We incorporate a microscopic relativistic nuclear potential obtained from the recently developed relativistic R3Y potential in the coupled-channels code ccfull to study fusion dynamics. The R3Y potential and the densities of interacting nuclei are obtained for the relativistic mean-field appro…
[Phys. Rev. C 109, 034617] Published Wed Mar 27, 2024
]]>Background: Multinucleon transfer (MNT) reactions are considered now as a possible tool to produce new isotopes of heavy and superheavy elements.
Purpose: Experimental study of MNT fragments formed in the reaction at beam energy of 1.11 GeV and comparison with theoretical calculatio…
[Phys. Rev. C 109, 034616] Published Thu Mar 21, 2024
]]>We suggest that the angular momentum in fission fragments is generated by statistical excitation at scission. The magnitude of the angular momentum is determined by excitation energy and shell structure in the level density. Treating the prescission shape evolution as a diffusive process, implemente…
[Phys. Rev. C 109, 034615] Published Wed Mar 20, 2024
]]>We have studied the shear and bulk viscosities of asymmetric nuclear matter in the mechanical and chemical instability region based on isospin-dependent Boltzmann-Uehling-Uhlenbeck transport simulations in a box system. The Green-Kubo method is used to calculate these viscosities with a prepared dyn…
[Phys. Rev. C 109, 034614] Published Mon Mar 18, 2024
]]>Scattering experiments were performed at the Geel Electron Linear Accelerator (GELINA) to determine the differential cross sections of neutron elastic and inelastic scattering on , using a highly enriched sample. Neutron energies were calculated via the time-of-flight technique. The scattered ne…
[Phys. Rev. C 109, 034612] Published Fri Mar 15, 2024
]]>Optical potentials, either phenomenological or microscopic, are used in nuclear reactions to reduce the complexity of the quantum many-body scattering to a tractable one-body problem. In this work the authors extend to heavier nuclei a highly predictive microscopic approach based on - self-consistent Green’s function (SCGF) calculations that use and chiral interactions as the only input. The computed elastic proton scattering off Ca and Ni isotope chains demonstrate the stability of the SCGF input, a method that requires only polynomial scaling of computational resources and reaches masses up to 140 nucleons or more. The predictive power of their optical potential promises interesting implications for studying nuclei away from stability, a frontier in nuclear science including nuclear astrophysics in the coming years.
[Phys. Rev. C 109, 034613] Published Fri Mar 15, 2024
]]>A reliable way of calculating the width, , of an extremely narrow quantum resonance is suggested. The proposed method is based on expanding the Jost function in the Taylor series around the real resonance energy, , and looking for its zero at the nearby complex point . The coefficients of …
[Phys. Rev. C 109, 034610] Published Thu Mar 14, 2024
]]>A standard way to solve the Schrödinger equation is to discretize the radial coordinates and apply a numerical method for a differential equation, such as the Runge-Kutta method or the Numerov method. Here I employ a discrete basis formalism based on a finite mesh method as a simpler alternative, wi…
[Phys. Rev. C 109, 034611] Published Thu Mar 14, 2024
]]>Fusion reactions with stable and radioactive isotopes of light nuclei are indicated to control the crustal composition, nucleosynthesis, and heating mechanism during nuclear burning in neutron stars. The role of isospin asymmetry and proton-/neutron-skin thickness in the fusion excitation function a…
[Phys. Rev. C 109, 034604] Published Tue Mar 12, 2024
]]>Background: Well established coupled channel (CC) and coupled reaction channel (CRC) processes make contributions to the elastic scattering optical model potential (OMP) that are not represented in local density folding models.
Purpose: We aim to establish and characterize the contribution to the
[Phys. Rev. C 109, 034605] Published Tue Mar 12, 2024
]]>We performed a least-squares fit analysis to reproduce the elastic angular distributions for scattering on various nuclei form to for incident energies in the range 18–70 MeV using a velocity-dependent optical model (VDOM). The model reproduced the experimental data well including the en…
[Phys. Rev. C 109, 034606] Published Tue Mar 12, 2024
]]>Natural indium targets were exposed to high-energy bremsstrahlung radiation, from 9 MeV to 23 MeV. Using the measured spectra, the yield ratio of and was determined. It was checked to what extent the measured values of the yield ratio can be reproduced using the existing experimental…
[Phys. Rev. C 109, 034607] Published Tue Mar 12, 2024
]]>We propose two functions to distinguish fission-like events from quasielastic (QE) scattering and deep-inelastic collisions (DIC), for a better analysis of the measured mass-total kinetic energy distributions of binary fragments formed in fusion-fission reactions. We note that the ratio of capture t…
[Phys. Rev. C 109, 034608] Published Tue Mar 12, 2024
]]>Background: The fission mechanism of sub-lead nuclides remains unclear, especially the types of fission modes involved and their corresponding shell effects.
Purpose: The aim is to identify the different modes in the fission of , and investigate the corresponding mechanism.
Method: The three-di…
[Phys. Rev. C 109, 034609] Published Tue Mar 12, 2024
]]>Background: We clarified that the fusion hindrance in heavy ion collisions is caused by the expansion of the neck bridge at the early stage of collision [Phys. Rev. C 108, 014612 (2023)]; however, our discussion was limited to the trajectory analysis. To get a reliable fusion cross section, it is im…
[Phys. Rev. C 109, 034603] Published Mon Mar 11, 2024
]]>We have generalized the four-dimensional Langevin approach used in our previous works for the description of the fission process to five dimensions by considering the neck parameter in the two-center shell model shape parametrization as an independent dynamical variable. The calculated results for…
[Phys. Rev. C 109, 034602] Published Wed Mar 06, 2024
]]>Simultaneous analyses are performed of cross-section data for elastic scattering, fusion, Coulomb breakup, and other direct yields for the system at near Coulomb-barrier energies. The bare and dynamical polarization potentials are constructed microscopically from the structure of the colli…
[Phys. Rev. C 109, 034601] Published Fri Mar 01, 2024
]]>In this work, we propose a novel method for calculating the occupation probability in the Pauli blocking of the quantum molecular dynamics type models. This method refines the description of the Pauli blocking ratio in the nuclear matter and that in the finite nucleus. The influence of the new Pauli…
[Phys. Rev. C 109, L021604] Published Thu Feb 29, 2024
]]>Within the framework of the isospin-dependent quantum molecular dynamics (IQMD) model, we simulate the semiperipheral collisions of neutron-rich Ca, Mg, and Ne isotopes on target at 50 MeV/nucleon. Different neutron-skin thicknesses of projectiles are obtained by adjusting the neutron diffu…
[Phys. Rev. C 109, 024616] Published Mon Feb 26, 2024
]]>Multinucleon transfer (MNT) reactions have received increasing interest in the synthesis of neutron-rich nuclei due to the distinct limitations of other reactions, particularly in the region, which represents the last waiting point of astrophysical nucleosynthesis. However, it is still a chall…
[Phys. Rev. C 109, 024617] Published Mon Feb 26, 2024
]]>Background: A systematic exploration of one-nucleon transfer reactions induced by the () and () reactions on different targets () is being performed at the Istituto Nazionale di Fisica Nucleare–Laboratori Nazionali del Sud (INFN-LNS) at beam energ…
[Phys. Rev. C 109, 024615] Published Thu Feb 22, 2024
]]>The microscopic framework of time-dependent covariant density functional theory is applied to study multinucleon transfer reactions with transfer probabilities calculated using the particle number projection method. It is found that similar total cross sections are obtained with two different relati…
[Phys. Rev. C 109, 024614] Published Wed Feb 21, 2024
]]>The evaporation residue (ER) cross sections of and channels related to the synthesis of a superheavy element (SHE) with the charge number in the reaction have been calculated by the dinuclear system (DNS) model as a sum of the partial cross sections of the corresponding channel…
[Phys. Rev. C 109, 024613] Published Tue Feb 20, 2024
]]>First-chance fission probabilities of various Am, Pu, and Np isotopes are found to display a significant neutron odd-even stagger (OES), and an obvious excitation energy dependence of the OES is presented. Moreover, a prominent dissipation effect on the OES is revealed, and the differences in
[Phys. Rev. C 109, L021603] Published Tue Feb 20, 2024
]]>To discuss the half-life of the electron-capture decay of in cluster and crystal forms of beryllium, we performed density functional calculations of the electron density at the Be nucleus by assuming an inversely proportional relationship between them. We found that the electron density
[Phys. Rev. C 109, 024609] Published Thu Feb 15, 2024
]]>We systematically explored all conceivable combinations of projectiles and targets through experimental studies, focusing on the synthesis of lanthanides to superheavy nuclei within the atomic number range of . Utilizing the dinuclear system model, we evaluated evaporation residue cross sect…
[Phys. Rev. C 109, 024610] Published Thu Feb 15, 2024
]]>There are three accepted next proton closures beyond the lead atomic number: , 120, and 126. The heaviest one, , is analyzed within its decay process. A binary adapted macroscopic-microscopic method is used to obtain all fission barriers along different decay channels. The whole range of m…
[Phys. Rev. C 109, 024611] Published Thu Feb 15, 2024
]]>This study investigates the probable heavy-cluster radioactivity from superheavy nuclei with using the modified double-folding formalism by applying the Pauli exclusion principle. To this aim, the half-lives of the most probable cluster radioactivity are investigated by applying the Pauli …
[Phys. Rev. C 109, 024612] Published Thu Feb 15, 2024
]]>The issue of cluster production in heavy-ion collisions is addressed in a new manner, by implementing cluster correlation into the quantum molecular dynamics (QMD) transport model. We demonstrate for the first time, the good potentialities of this popular transport approach in the unified descriptio…
[Phys. Rev. C 109, L021602] Published Thu Feb 15, 2024
]]>Within the framework of the isospin-dependent quantum molecular dynamics model and statistical evaporation model, the production of neutron-deficient isotopes is investigated. The fusion probability in the reaction is larger than that with beam, especially at a lower incide…
[Phys. Rev. C 109, 024606] Published Tue Feb 13, 2024
]]>The properties of resonances in the interaction are important for analyses of astrophysical processes and for understanding of the development of the -cluster structure with addition of neutrons to 4N nuclei. Previous high-energy resolution measurements have not been treated using the contemp…
[Phys. Rev. C 109, 024607] Published Tue Feb 13, 2024
]]>Theoretical predictions for lepton-induced single-pion production (SPP) on are revisited in order to assess the effect of different treatments of the current operator. On one hand we have the asymptotic approximation, which consists in replacing the particle four-vectors that enter in the operat…
[Phys. Rev. C 109, 024608] Published Tue Feb 13, 2024
]]>A neutron-generator-based source of fission products (nuCARIBU) is being developed to replace the existing source at Argonne National Laboratory. Neutrons generated by reaction are thermalized in a compact polyethylene [( moderator and impinge on a thin foil to produce …
[Phys. Rev. C 109, 024605] Published Mon Feb 12, 2024
]]>Electron emission in the deuteron-deuteron reaction supporting existence of the single-particle threshold resonance in has been observed for the first time. The measured electron energy spectrum and the electron-proton branching ratio agree very well with the assumed electron-positron pair creat…
[Phys. Rev. C 109, L021601] Published Mon Feb 12, 2024
]]>We investigated the elastic scattering, inelastic scattering, breakup reactions, and total fusion reactions of the system using the extended optical model (OM) and a coupled channel (CC) approach. The aim of this study is to elucidate the suppression of the elastic cross section that is i…
[Phys. Rev. C 109, 024603] Published Thu Feb 08, 2024
]]>In this work, the Light Gradient Boosting Machine (LightGBM), which is a modern decision tree based machine-learning algorithm, is used to study the fusion cross section (CS) of heavy-ion reaction. Several basic quantities (e.g., mass number and proton number of projectile and target) and the CS obt…
[Phys. Rev. C 109, 024604] Published Thu Feb 08, 2024
]]>The accurate determination of the nuclear interaction potential is essential for predicting fusion cross sections and understanding the reaction mechanism, which plays an important role in the synthesis of superheavy elements. In this work, a neural network, which combines with the calculations of t…
[Phys. Rev. C 109, 024601] Published Mon Feb 05, 2024
]]>The fission process of the excited compound nucleus produced in neutron-induced reactions at incident energies from thermal to 14 MeV has been simulated by using a stochastic approach based on four-dimensional Langevin equations. The fission cross section, the total kinetic energy of fission f…
[Phys. Rev. C 109, 024602] Published Mon Feb 05, 2024
]]>Background: The neutron capture cross section has significant implications for Be materials in the nuclear industry as well as the α process in stellar nucleosynthesis. While the cross section is well constrained at thermal neutron energies, there is a lack of experimental data at higher neutron…
[Phys. Rev. C 109, 014625] Published Wed Jan 31, 2024
]]>The angular distributions for the elastic scattering and breakup reactions of the mirror nuclei and on a target, at incident energies of 255 MeV and 343 MeV, respectively, were measured at HIRFL-RIBLL. The elastic scattering and breakup angular distributions of the halolike nucleus …
[Phys. Rev. C 109, 014624] Published Mon Jan 29, 2024
]]>Microscopic calculations of neutrino-nucleus scattering cross sections are critical for the success of the neutrino-oscillation program. In addition to retaining nuclear correlations in the initial and final state of the reaction, they are based on consistent nuclear interactions and transition curr…
[Phys. Rev. C 109, 014623] Published Fri Jan 26, 2024
]]>Within the framework of the dinuclear system model, the experimentally accessible projectile-target combinations are predicted for the production of new superheavy elements with and . The entrance channel effect and the isotopic dependence of targets and projectiles on the capture, fusion…
[Phys. Rev. C 109, 014622] Published Thu Jan 25, 2024
]]>Root mean square (rms) radii of light-heavy nuclei , and are studied by analyzing the total reaction cross section data on a target at intermediate energies within the range of MeV/nucleon with the eikonal model. For calculati…
[Phys. Rev. C 109, 014621] Published Wed Jan 24, 2024
]]>Understanding of -ray production via neutron interactions on oxygen is essential for the study of neutrino neutral-current quasielastic interactions in water Cherenkov detectors. A measurement of -ray production from such reactions was performed using a 77 MeV quasimonoenergetic neutron beam. Seve…
[Phys. Rev. C 109, 014620] Published Mon Jan 22, 2024
]]>We have calculated the cross sections (CS), differential cross sections (DCS), and astrophysical factors for the reactions , , , , , , and through a multichannel-multilevel -matrix analysis. We have performed …
[Phys. Rev. C 109, 014619] Published Fri Jan 19, 2024
]]>Fission barrier heights of short-lived nuclei away from line of stability are not known reliably. Low-energy fission of and , produced by () and () transfer reaction on the re-accelerated unstable beam was investigated at HIE-ISOLDE. Four Timepix3 pixel detectors were instal…
[Phys. Rev. C 109, 014618] Published Thu Jan 18, 2024
]]>Photoneutron emission cross sections were measured for below threshold using quasimonochromatic -ray beams produced in laser Compton scattering at the NewSUBARU synchrotron radiation facility. The data show fine structures in the low-energy tail of the giant-dipole resonance; the integrated …
[Phys. Rev. C 109, 014617] Published Wed Jan 17, 2024
]]>The fragment mass and total kinetic energy distributions were measured in fission of , populated in the reaction at excitation energies down to 15.3 MeV above the fission barrier. Fits considering admixture of symmetric and asymmetric fission indicate the presence of substantial asymm…
[Phys. Rev. C 109, 014613] Published Tue Jan 16, 2024
]]>A self-consistent description of angular correlations in neutron-induced reactions is required for quantitative analysis of parity violating (PV) and time-reversal invariance violating (TRIV) effects in neutron-nucleus scattering. The 1.33 eV -wave compound resonance in is one of the few -wa…
[Phys. Rev. C 109, 014614] Published Tue Jan 16, 2024
]]>We have revisited the spin dynamics in intermediate-energy heavy-ion collisions based on the improved spin- and isospin-dependent Boltzmann-Uehling-Uhlenbeck (SIBUU) transport model, particularly with the constraint of rigorous angular momentum conservation incorporated. We have studied the spin pol…
[Phys. Rev. C 109, 014615] Published Tue Jan 16, 2024
]]>We combine the ab initio symmetry-adapted no-core shell model (SA-NCSM) with the single-particle Green's function approach to construct optical potentials rooted in first principles. Specifically, we show that total cross sections and phase shifts for neutron elastic scattering from a target wit…
[Phys. Rev. C 109, 014616] Published Tue Jan 16, 2024
]]>A comprehensive study of the proton capture reaction is performed. The three major reaction mechanisms, namely, compound-nucleus capture (CNC), pre-equilibrium capture (PEC), and direct capture (DIC), are simultaneously considered on the basis of the Hauser-Feshbach model, the exciton model, and pot…
[Phys. Rev. C 109, 014611] Published Fri Jan 12, 2024
]]>The α-decay chains of the isotopes are studied in the present paper. The modified generalized liquid drop model (MGLDM) is used to study the α-decay half-lives. The results are then compared with other theoretical formalisms. The decay chains of these isotopes are predicted by comparin…
[Phys. Rev. C 109, 014612] Published Fri Jan 12, 2024
]]>The complete and incomplete fusion cross sections for the reaction were measured at near barrier energies by the online characteristic -ray detection technique. The complete fusion (CF) cross sections at energies above the Coulomb barrier were found to be suppressed by compared to th…
[Phys. Rev. C 109, 014610] Published Thu Jan 11, 2024
]]>The fusion-evaporation reaction aimed at synthesizing new neutron-deficient protactinium isotopes has been studied at the gas-filled recoil separators SHANS and SHANS2. The cross sections for the and evaporation channels were measured. The calculation by the statistical model HIVAP…
[Phys. Rev. C 109, 014608] Published Tue Jan 09, 2024
]]>A global phenomenological energy dependent optical potential for the radioactive nucleus on various targets is developed. This optical potential is based on Woods-Saxon form factors with a smooth mass dependent potential depth for above-barrier energies and an energy and mass dependent depth bel…
[Phys. Rev. C 109, 014609] Published Tue Jan 09, 2024
]]>Fusion enhancement for neutron-rich isotopes of oxygen on carbon nuclei was probed. To measure the fusion cross section a beam accelerated to MeV bombarded the active-target detector MuSIC@Indiana with a fill gas of . Examination of the average fusion cross section over the interva…
[Phys. Rev. C 109, L011601] Published Tue Jan 09, 2024
]]>Background: Several approaches are currently trying to understand the generation of angular momentum in the fission fragments. The microscopic TDDFT and statistical FREYA lead to different predictions concerning the opening angle distribution formed between the two spins in particular at 0 and 180 d…
[Phys. Rev. C 109, L011602] Published Tue Jan 09, 2024
]]>We systematically investigate the -decay and spontaneous fission (SF) half-lives of superheavy nuclei (SHN) and 126 in the mass number range . The -decay half-lives have been calculated within the double folding model (DFM), the universal decay law (UDL), the scaling law…
[Phys. Rev. C 109, 014606] Published Mon Jan 08, 2024
]]>The statistical model for the calculation of the compound nucleus formation cross section and the probability of compound nucleus formation in heavy-ion collisions is discussed in detail. Light, heavy, and superheavy nucleus-nucleus systems are considered in this model in the framework of one approa…
[Phys. Rev. C 109, 014607] Published Mon Jan 08, 2024
]]>The influence of the spin cut-off parameter on the isomeric cross-section ratio of the reaction is studied within the Huizenga-Vandenbosch method, in which the neutron transmission coefficient is evaluated from the optical model, and the spin cut-off parameter is treated for the residual nucl…
[Phys. Rev. C 109, 014603] Published Fri Jan 05, 2024
]]>Background: In recent years, the NUMEN project has highlighted that the systematic study of double charge exchange (DCE) nuclear reactions could provide precious information on the nuclear matrix elements of neutrinoless double decay. To achieve this goal, a multichannel approach was adopted, wher…
[Phys. Rev. C 109, 014604] Published Fri Jan 05, 2024
]]>The study of the angular momentum properties of fission fragments can shed light on the complex mechanisms that characterize the fission process. One quantity that is of significant interest, and has not yet been studied adequately, is the alignment of the fragments, which is the cause of anisotropy…
[Phys. Rev. C 109, 014605] Published Fri Jan 05, 2024
]]>The importance of studying the reaction is motivated by multiple nuclear applications which rely on an accurate nuclear reaction data library for oxygen. Discrepancies between past experimental data on the reaction and its time-reverse reaction have led to various di…
[Phys. Rev. C 109, 014601] Published Tue Jan 02, 2024
]]>Approximating the angular momentum dependence of the reaction probability at a given bombarding energy by shifting it by the centrifugal energy and using the analytical formula for the elastic scattering probability, new analytical formulas for heavy-ion reaction cross sections and the universal rea…
[Phys. Rev. C 109, 014602] Published Tue Jan 02, 2024
]]>An infinity of extensions of the Siegert transformation exist in the Coulomb gauge. All resulting transition multipoles of the electric field are identical at the long-wavelength approximation but differ beyond. In the particular case of isospin forbidden electric dipole transitions, they introduce …
[Phys. Rev. C 108, 064610] Published Thu Dec 28, 2023
]]>The nuclear collision at 275 MeV is theoretically studied in the elastic, inelastic, one-nucleon transfer, and charge-exchange channels. The elastic scattering channel is treated within the optical model framework with the help of semimicroscopic double folding potentials, which are constru…
[Phys. Rev. C 108, 064609] Published Tue Dec 26, 2023
]]>New experimental and theoretical results obtained in 2021 made it acutely clear that more than 80 years after the discovery of nuclear fission we do not understand the generation and dynamics of fission fragment (FF) intrinsic spins well, in particular their magnitudes, their spatial orientation, an…
[Phys. Rev. C 108, L061602] Published Tue Dec 26, 2023
]]>Electron scattering is currently the subject of renewed interest, also by virtue of its connections with the neutrino-nucleus interaction. This work represents a step forward for the description of the quasielastic region, through the introduction of two-body meson-exchange currents in a fully relativistic approach. The good agreement with the experimental response of C opens up interesting perspectives of applications of the same model to neutrino scattering of heavier nuclei, of great interest for neutrino oscillation experiments, in particular for the new generation of experiments that require an unprecedented level of accuracy.
[Phys. Rev. C 108, 064608] Published Fri Dec 22, 2023
]]>In reference to the complete fusion (CF) and incomplete fusion (ICF) processes, the analysis of and reactions forming the compound nucleus (CN) is carried out at incident energies spreading across the Coulomb barrier. The theoretical calculations of the formation of the comp…
[Phys. Rev. C 108, 064607] Published Thu Dec 21, 2023
]]>We present results from direct measurements of the total cross section over laboratory energies –8.0 MeV, performed with the giant barrel neutron detector at the Edwards Accelerator Laboratory. The cross sections reported in this work are considerably lower than prior direct…
[Phys. Rev. C 108, L061601] Published Wed Dec 20, 2023
]]>Nuclear fission produces fragments endowed with typically half a dozen units of angular momentum. After scission has occurred, the fragments are still interacting via the Coulomb force which exerts a torque on deformed fragments, thereby accelerating their rotations. The essential features of this e…
[Phys. Rev. C 108, 064606] Published Fri Dec 15, 2023
]]>A inelastic scattering experiment was carried out using a 23 MeV/nucleon beam in order to search for the missing positive parity state with a configuration of in the neutron-rich nucleus , referred to as the -wave neutron excitation state. Several states at excitat…
[Phys. Rev. C 108, 064605] Published Thu Dec 14, 2023
]]>Background: Multinucleon transfer (MNT) reactions involving heavy projectile and target combinations stand as a promising method for synthesizing new neutron-rich exotic nuclei, which may not be possible using hot or cold fusion reactions or fragmentation. Exploring the mechanisms behind MNT reactio…
[Phys. Rev. C 108, 064604] Published Tue Dec 12, 2023
]]>Based on the Boltzmann-Uehling-Uhlenbeck (BUU) transport equation, a medium correction to the elastic nucleon-nucleon () cross sections is given by comparing the width of the isovector giant dipole resonance in and the nuclear stopping obtained from the BUU equation with those from experimen…
[Phys. Rev. C 108, 064603] Published Wed Dec 06, 2023
]]>Background: Nuclear fission is influenced by shell effects. Fission modes are a strong signature of the compound nucleus formation in heavy ion induced reactions. The evolution of the relative strengths of the fission modes with excitation energy is a matter of intense interest.
Purpose: We investig…
[Phys. Rev. C 108, 064601] Published Mon Dec 04, 2023
]]>The population of isomeric states in the prompt decay of fission fragments—so-called isomeric yield ratios (IYRs)—is known to be sensitive to the angular momentum that the fragment emerged with, and may therefore contain valuable information on the mechanism behind the fission process. In this wor…
[Phys. Rev. C 108, 064602] Published Mon Dec 04, 2023
]]>
Background: Isomeric yield ratios are an important observable in nuclear fission as they can guide model development by providing insight into the angular momentum generation. Furthermore, isomeric yield ratios are important in applications for nuclear energy, as well as in the study of the…
[Phys. Rev. C 108, 054613] Published Thu Nov 30, 2023
]]>The excitation functions of evaporation residues in , and channels for the reactions leading to the compound nucleus with are studied within the dinuclear system model. The stationary solution of master equation is applied to calculate the formation-decay probabilities of dinuclea…
[Phys. Rev. C 108, 054612] Published Wed Nov 29, 2023
]]>An investigation of the quasiprojectile breakup channel in semiperipheral and peripheral collisions of at 32 and 52 MeV/nucleon is presented. Data have been acquired in the first experimental campaign of the INDRA-FAZIA apparatus in GANIL. The effect of isospin diffusion between proj…
[Phys. Rev. C 108, 054611] Published Tue Nov 28, 2023
]]>The neutron emission, extensively used as a clock to measure fission delay, is not fully understood. There are ambiguities in interpretation of experimental results at higher energies and a dearth of information at low energies. In order to address these issues, a measurement of pre-scission neutron…
[Phys. Rev. C 108, 054609] Published Mon Nov 27, 2023
]]>We determined the matter density distributions and root-mean-square radii of , , , , , , , , , , , and through fitting the relative and the absolute small-angle differential cross sections of proton-nucleus elastic scatt…
[Phys. Rev. C 108, 054610] Published Mon Nov 27, 2023
]]>Background: Asymmetric fission is known to occur in two regions, the actinides and sublead, and is dependent on the fissioning system excitation energy. Experimental evidence in the sublead region show that this mode is surprisingly persistent with increasing energy and its origin is not fully under…
[Phys. Rev. C 108, 054608] Published Wed Nov 22, 2023
]]>Background: Precise understanding of nuclear fission is crucial for experimental and theoretical nuclear physics, astrophysics, and industrial applications; however, the complete physical mechanism is unresolved due to the complexities.
Purpose: In this study, we present a new method to describe the…
[Phys. Rev. C 108, 054607] Published Tue Nov 21, 2023
]]>The multinucleon transfer mechanism in collisions is investigated in the framework of quantal transport description, based on the stochastic mean-field (SMF) theory. The SMF theory provides a microscopic approach for nuclear dynamics beyond the time-dependent Hartree-Fock approach by incl…
[Phys. Rev. C 108, 054605] Published Mon Nov 20, 2023
]]>The mechanism of direct knockout of a nucleon from heavy deformed nuclei with by photons in the MeV energy range is considered, and the interaction of the ejected nucleon with the rotational degrees of freedom of the final nucleus is taken into account. It is assumed that the rotation fr…
[Phys. Rev. C 108, 054606] Published Mon Nov 20, 2023
]]>Background: Spectroscopy of the exotic, neutron unbound beryllium isotope is still a puzzle despite significant experimental efforts.
Purpose: We aim to observe states in , establish spin-parities and spectroscopic factors, and use isospin symmetry to inform spectroscopy of .
Metho…
[Phys. Rev. C 108, L051606] Published Mon Nov 20, 2023
]]>Electron capture (EC) decay of a atom, the rate of which is affected by the electron density at the nucleus, forms a atom and emits a neutrino. Herein, we studied the EC decay rate of , in which those fullerenes have enhanced stability relative to their nea…
[Phys. Rev. C 108, 054604] Published Fri Nov 17, 2023
]]>Contrary to descriptions from coupled-channels or other model calculations, heavy-ion fusion excitation functions are not smooth near and above the Coulomb barrier. There appear to be weak but noticeable oscillations or structures within the excitation functions that can be observed clearly in repre…
[Phys. Rev. C 108, L051604] Published Thu Nov 16, 2023
]]>An unexpected overlapping behavior has been observed for fusion excitation functions from different entrance channels that fuse to the same compound nucleus in energies above the barrier. The overlap appears when the center of mass energy of each excitation function is multiplied by a constant …
[Phys. Rev. C 108, L051605] Published Thu Nov 16, 2023
]]>Reaction-plane deblurring is applied to the triple-differential distributions of protons, deuterons, and negatively charged pions from central Ar KCl collisions at , measured with the LBL-GSI Streamer Chamber, to yield distributions relative to the true reaction plane of the collisio…
[Phys. Rev. C 108, L051603] Published Wed Nov 15, 2023
]]>Background: The reaction is of interest for nuclear reaction theory, nuclear astrophysics, and is important for neutronless (aneutronic) fusion . At low-energies the factor of the reaction is contributed by the near-threshold resonance with the …
[Phys. Rev. C 108, 054603] Published Tue Nov 14, 2023
]]>Heavy-ion fusion is a major research area, and practical approaches to describe the evolution of the nucleon movement across the barrier between the two nuclei are highly relevant for elucidating the essential dynamics of the fusion process. When two nuclei approach each other to distances where the nuclear force becomes active, neutrons and protons could move from one nucleus to the other. This movement could open and facilitate the pathway to fusion. The authors employ a microscopic many-body approach based on the density-constrained time-dependent Hartree-Fock calculations to study the impact of isospin (i.e., proton versus neutron) dynamics on low-energy nuclear fusion along an isotope chain and its dependence on the deformation of the colliding nuclei. In asymmetric systems, iso-vector dynamics plays a significant role. Its typical effect is a reduction in the potential barrier, which turns into enhancement for neutron-rich systems. These effects could be studied at facilities that provide beams of exotic, unstable nuclei.
[Phys. Rev. C 108, L051602] Published Tue Nov 14, 2023
]]>I investigate the difficulties in obtaining the electromagnetic response of light, halolike nuclei using reactions at radioactive beam facilities. A relativistic coupled-channels theory for the calculation of dissociation cross sections of halo nuclei is compared to first-order perturbation theory. …
[Phys. Rev. C 108, 054602] Published Mon Nov 13, 2023
]]>The cluster transfer in multinucleon-transfer reactions near Coulomb barrier energies is implemented into the master equations in the dinuclear system model, in which deuterons, tritons, , and particles are taken into account. The effects of cluster transfer and dynamical deformation on the for…
[Phys. Rev. C 108, L051601] Published Mon Nov 13, 2023
]]>We use a recently proposed theoretical model to evaluate complete and incomplete fusion cross sections in collisions of with . The former is compared to the data of Kumawat et al. [H. Kumawat, V. Jha, V. V. Parkar, B. Roy, S. K. Pandit, R. Palit, P. K. Rath, C. F. Palshetkar, S. K. Sharma, S…
[Phys. Rev. C 108, 054601] Published Tue Nov 07, 2023
]]>Nucleon-nucleon () interactions based on chiral effective theories are commonly used in ab initio calculations of light nuclei. Here we present a study based on three different interactions (up to next-to-next-to-leading order) for which structure and elastic proton scattering observables are c…
[Phys. Rev. C 108, 044617] Published Mon Oct 30, 2023
]]>Spontaneous fission half-lives of actinide and superheavy nuclei are calculated using the least-action integral of the Wentzel-Kramers-Brillouin (WKB) tunneling probability through the barrier that appears in the deformation landscape obtained in the macroscopic-microscopic potential-energy surface.…
[Phys. Rev. C 108, 044618] Published Mon Oct 30, 2023
]]>Background: and play an important role in big bang nucleosynthesis and nuclear astrophysics. The radiative capture reaction is crucial for the determination of the primordial abundance. In nuclear astrophysics, lithium isotopes have attracted great interest because of the pu…
[Phys. Rev. C 108, 044616] Published Fri Oct 27, 2023
]]>The aim of this paper is to investigate how the choice of deuteron potential affects the nonelastic cross sections of , and in the low-energy region below 200 MeV within the extended framework of the intranuclear cascade model, in which a three-body proton-neutron-target system …
[Phys. Rev. C 108, 044615] Published Wed Oct 25, 2023
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