Article
Astronomy & Astrophysics
A. Rahmatinejad, T. M. Shneidman, G. G. Adamian, N. V. Antonenko, P. Jachimowicz, M. Kowal
Summary: The probabilities of xn-, pxn-, and αxn- evaporation channels in excited superheavy nuclei were evaluated using the Monte Carlo method. The calculations utilized microscopically determined nuclear level densities and were compared with results obtained from the phenomenological Jackson formula. Effective temperatures derived from the microscopic approach were incorporated into the Jackson formula for different evaporation channels at low and moderate excitation energies. Additionally, an analytical formula was introduced to estimate the average kinetic energy of emitted particles in multi-step processes.
Article
Physics, Nuclear
Rajni, Kirandeep Sandhu, Manoj K. Sharma
Summary: The Skyrme energy density formalism is used to study the capture cross sections of superheavy nuclei. Different forces and parameters are included to calculate the cross sections of neutron evaporation, fission, and quasifission, and the mass distribution, deformations, and magic shell effects are also investigated. Finally, the kinetic energy distribution of fragments is calculated using different potentials and compared with experimental data.
Article
Physics, Nuclear
Juhee Hong, G. G. Adamian, N. V. Antonenko, M. Kowal, P. Jachimowicz
Summary: In this study, excitation functions for the production of isotopes of superheavy nuclei with charge numbers 108-116 are calculated and compared to experimental data, specifically for the Ca-48 and Ra/actinide-based complete fusion reactions. The calculated production cross sections clearly identify the border nucleus Ds between the island of stability of superheavy nuclei and the mainland with a relatively large number of neutrons.
Article
Physics, Nuclear
Jia-Xing Li, Hong-Fei Zhang
Summary: This study investigates the possible stable and radioactive beam-induced hot fusion reactions for the production of a new superheavy element (SHE) with Z=120 using the dinuclear system model. The results show that the reaction 45Sc+252Es is a suitable choice for synthesizing the SHE Z=120 due to its larger mass asymmetry. Furthermore, the effects of fission barrier and neutron separation energy on the reaction cross-section are analyzed.
Article
Physics, Multidisciplinary
H. C. Manjunatha, N. Sowmya, P. S. Damodara Gupta, L. Seenappa, T. Nandi
Summary: Research has found that selecting the appropriate beam energy is crucial for the synthesis of superheavy elements. Improper choice of beam energy has been identified as the cause of failure in synthesizing certain superheavy elements. Optimal beam energies for obtaining the maximum evaporation residue cross sections have been predicted, with hopes of extending the periodic table.
EUROPEAN PHYSICAL JOURNAL PLUS
(2022)
Article
Physics, Nuclear
Jia-Xing Li, Hong-Fei Zhang
Summary: This study predicts the optimal projectile-target combination and bombarding energy for the production of the new superheavy element Z = 119 using a dinuclear system model. The results suggest that the use of Sc-45 as the projectile and increasing the neutron number of the target nucleus can enhance the evaporation residue cross section.
Article
Physics, Nuclear
B. M. Kayumov, O. K. Ganiev, A. K. Nasirov, G. A. Yuldasheva
Summary: The DNS model and statistical model in KEWPIE2 were used to study the synthesis of a superheavy element with Z = 119 in the Cr-54 + Am-243 fusion reaction. The calculation method was verified by describing the evaporation residue cross sections in the Ca-48 + (243)AM reaction. The calculated results of partial and total cross sections for complete fusion, quasifission, fast fission, and evaporation residues formation for both reactions were discussed.
Article
Physics, Multidisciplinary
Nagaraj Sowmya, Holaly Chandrashekara Shastry Manjunatha, Pachipulusu Seetharamaiah Setty Damodara Gupta, Lakshmappa Seenappa, Narayanaswamy Manjunatha, Thiyagarajan Ganesh
Summary: In this study, the fusion cross sections, evaporation residue cross sections, fusion barrier distribution, and quasielastic distribution were investigated for the synthesis of superheavy elements using 45Sc-induced fusion reactions on actinide targets using ASM and DNS models. The evaporation residue cross sections using 45Sc projectiles were compared with experimental data. It was found that the 45Sc + 251Cf reaction is a potential fusion reaction for synthesizing the superheavy element Z = 119, with a predicted production cross section greater than 5 fb at an excitation energy of 44.41 MeV, and higher charge and mass asymmetry compared to other fusion reactions planned for synthesizing Z = 119.
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
(2023)
Article
Physics, Nuclear
J. Yang, J. Dudek, I Dedes, A. Baran, D. Curien, A. Gaamouci, A. Gozdz, A. Pedrak, D. Rouvel, H. L. Wang
Summary: This study introduces the concept of the nuclear octupole fourfold and discusses its impact on the stability of nuclei. The calculations suggest that the octupole-tetrahedral geometry significantly lowers the nuclear energy.
Article
Physics, Nuclear
G. Saxena, A. Jain
Summary: This article proposes a simple relation that estimates the half-life of cluster and alpha-decays by considering the isospin of the parent nucleus and the angular momentum taken away by the emitted particle. The improved version not only accurately predicts experimental half-lives in the trans-tin and trans-lead regions, but also explains cluster emission in superheavy nuclei.
EUROPEAN PHYSICAL JOURNAL A
(2023)
Article
Physics, Nuclear
P. Sarriguren
Summary: The competition between alpha- and beta(+) /EC-decay modes in superheavy nuclei synthesis is systematically studied. The alpha decay is found to be the dominant decay mode in most cases, but there are interesting instances where the half-lives of both modes are comparable, indicating the possibility of new pathways to more neutron-rich nuclei in this region.
Article
Astronomy & Astrophysics
Erika M. Holmbeck, Jennifer Barnes, Kelsey A. Lund, Trevor M. Sprouse, G. C. McLaughlin, Matthew R. Mumpower
Summary: As LIGO-Virgo-KAGRA begins its fourth observing run, there is a new opportunity to search for electromagnetic counterparts of compact object mergers. The study investigates the properties of neutron-rich nuclei in binary neutron star mergers and their potential impact on kilonova light-curve evolution. Establishing a lower limit on heavy-element production and potential synthesis of superheavy elements in nature are important.
ASTROPHYSICAL JOURNAL LETTERS
(2023)
Article
Physics, Nuclear
R. M. Clark, D. Rudolph
Summary: We use the superfluid tunneling model (STM) to accurately calculate the half-lives of alpha decays of odd -A and odd -odd superheavy nuclei (SHN) with Z ?, 100 and A ?, 250, comparable to other contemporary models. The influence of the quasiparticle structure on the properties of alpha decay chains of odd -A SHN is examined using the STM. High-Q orbitals play an important role in defining the observed characteristics of the alpha-decay chains, and ambiguity in assigning alpha-decay chains to specific SHN may arise due to the quasiparticle structure.
Review
Physics, Nuclear
G. G. Adamian, N. V. Antonenko
Summary: This paper discusses the optimal reactions for producing superheavy nuclei and reviews fusion models. It presents the dependence of calculated evaporation residue cross sections on predicted nuclear properties and suggests reactions to produce nuclei with Z = 119 and 120, as well as unknown isotopes of superheavy nuclei. The predicted evaporation residue cross sections for future experiments are provided, and the relationship between self-consistent methods and microscopic-macroscopic approaches is considered.
EUROPEAN PHYSICAL JOURNAL A
(2022)
Article
Physics, Nuclear
C. Nithya, K. P. Santhosh
Summary: This paper investigates the competition between alpha-decay and spontaneous fission (SF) of Z = 120 isotopes with 283 <= A <= 350. The dominant decay mode is found to be alpha-decay, with smaller possibility of cluster radioactivity.
Article
Physics, Nuclear
Prithwijita Ray, Hi Pai, Sajad Ali, A. Mukherjee, S. Rajbanshi, S. Chakraborty, Soumik Bhattacharya, R. Banik, S. Nandi, S. Bhattacharyya, G. Mukherjee, C. Bhattacharya, G. Gangopadhyay, S. Samanta, S. Das, S. Chatterjee, R. Raut, S. S. Ghugre, P. C. Srivastava, J. Jehangir, Bharati Bhoy, N. Rather, G. H. Bhat, J. A. Sheikh, A. Goswami
Summary: This study investigates the low-lying states and three-phonon multiplets in the Sn-116 nucleus using experimental data and theoretical models. The experimental results provide insights into nuclear structure and reactions.
Article
Physics, Multidisciplinary
S. Malbrunot-Ettenauer, S. Kaufmann, S. Bacca, C. Barbieri, J. Billowes, M. L. Bissell, K. Blaum, B. Cheal, T. Duguet, R. F. Garcia Ruiz, W. Gins, C. Gorges, G. Hagen, H. Heylen, J. D. Holt, G. R. Jansen, A. Kanellakopoulos, M. Kortelainen, T. Miyagi, P. Navratil, W. Nazarewicz, R. Neugart, G. Neyens, W. Noertershauser, S. J. Novario, T. Papenbrock, T. Ratajczyk, P. G. Reinhard, L. Rodriguez, R. Sanchez, S. Sailer, A. Schwenk, J. Simonis, V Soma, S. R. Stroberg, L. Wehner, C. Wraith, L. Xie, Z. Y. Xu, X. F. Yang, D. T. Yordanov
Summary: Collinear laser spectroscopy was used to study the nuclear charge radii of nickel isotopes. Three ab initio methods were compared, with agreement in differential radii but only the NNLOsat method showing consistent absolute radii. The Skyrme functional SV-min was found to match experimental results more closely in nuclear density functional theory.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Nuclear
Manvi Rajput, Suram Singh, Preeti Verma, Veerta Rani, Arun Bharti, G. H. Bhat, J. A. Sheikh
Summary: A systematic study of nuclear observables related to the triaxial nature of even-even Cd isotopes is presented using the multi-quasiparticle triaxial projected shell model approach. The study reproduces observed systematics and provides a reasonable description of the measured properties.
Article
Computer Science, Interdisciplinary Applications
Mengzhi Chen, Tong Li, Bastian Schuetrumpf, Paul-Gerhard Reinhard, Witold Nazarewicz
Summary: The HFBFFT solver, based on Sky3D code, is developed to study the weakly bound nuclei affected by the quasiparticle continuum space. It solves the underlying equations directly in the canonical basis using fast Fourier transform, and implements measures like soft energy cutoff and pairing annealing to address the problems encountered in the pairing collapse. The accuracy and performance of HFBFFT have been tested and compared with other HFB codes for various nuclei.
COMPUTER PHYSICS COMMUNICATIONS
(2022)
Article
Physics, Multidisciplinary
Felix Sommer, Kristian Konig, Dominic M. Rossi, Nathan Everett, David Garand, Ruben P. de Groote, Jason D. Holt, Phillip Imgram, Anthony Incorvati, Colton Kalman, Andrew Klose, Jeremy Lantis, Yuan Liu, Andrew J. Miller, Kei Minamisono, Takayuki Miyagi, Witold Nazarewicz, Wilfried Noertershaeuser, Skyy V. Pineda, Robert Powel, Paul-Gerhard Reinhard, Laura Renth, Elisa Romero-Romero, Robert Roth, Achim Schwenk, Chandana Sumithrarachchi, Andrea Teigelhofer
Summary: Nuclear charge radii of Ni-55;56 were measured using collinear laser spectroscopy, and it was found that the trend of charge radii across shell closures is similar to that of calcium. The study also revealed the impact of M1 excitations between spin-orbit partners.
PHYSICAL REVIEW LETTERS
(2022)
Review
Physics, Multidisciplinary
Amber Boehnlein, Markus Diefenthaler, Nobuo Sato, Malachi Schram, Veronique Ziegler, Cristiano Fanelli, Morten Hjorth-Jensen, Tanja Horn, Michelle P. Kuchera, Dean Lee, Witold Nazarewicz, Peter Ostroumov, Kostas Orginos, Alan Poon, Xin-Nian Wang, Alexander Scheinker, Michael S. Smith, Long-Gang Pang
Summary: The advances in machine learning methods have broadened their applicability in scientific research, including nuclear physics, which has been greatly transformed by these techniques.
REVIEWS OF MODERN PHYSICS
(2022)
Article
Physics, Nuclear
Mohd Faisal, Rani Devi, S. K. Khosa, G. H. Bhat, J. A. Sheikh
Summary: The projected shell model is used to investigate the energy levels and alignment frequencies of normally deformed bands in light lutetium isotopes. The study successfully reproduces the band head spins and configurations for both positive and negative parity bands. The calculated aligned angular momenta accurately reproduce the observed backbends and rotational frequencies. The results also predict the band head spins and configurations for certain isotopes and show reasonable agreement with experimental data.
Article
Physics, Multidisciplinary
Paul-Gerhard Reinhard, Xavier Roca-Maza, Witold Nazarewicz
Summary: The recent experimental determination of the parity violating asymmetry APV in 48Ca and 208Pb at Jefferson Lab is important for understanding the arrangement of neutrons and protons inside atomic nuclei. To assess the impact of these measurements, a rigorous theoretical investigation and evaluation of associated uncertainties were conducted. The study concluded that accurate description of APV in 48Ca and 208Pb cannot be achieved by their models.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Nuclear
V Cirigliano, Z. Davoudi, J. Engel, R. J. Furnstahl, G. Hagen, U. Heinz, H. Hergert, M. Horoi, C. W. Johnson, A. Lovato, E. Mereghetti, W. Nazarewicz, A. Nicholson, T. Papenbrock, S. Pastore, M. Plumlee, D. R. Phillips, P. E. Shanahan, S. R. Stroberg, F. Viens, A. Walker-Loud, K. A. Wendt, S. M. Wild
Summary: This article presents the results of a study on the calculation of nuclear matrix elements for neutrinoless double-beta decay. It discusses recent progress, uncertainty quantification, and future plans to provide accurate and precise matrix elements.
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS
(2022)
Article
Physics, Nuclear
Kaushik Katre, P. V. Madhusudhana Rao, R. Raut, A. Sharma, K. Suryanarayana, A. Tejaswi, M. Ratna Raju, D. Vijaya Lakshmi, T. Seshi Reddy, M. Kumar Raju, S. Jehangir, N. Rather, G. H. Bhat, Nazira Nazir, J. A. Sheikh, Y. P. Wang, J. T. Matta, A. D. Ayangeakaa, U. Garg, S. S. Ghugre, T. Trivedi, B. S. Naidu, R. Palit, S. Saha, S. Muralithar, R. P. Singh
Summary: The nature of the yrast negative-parity band and its chiral-like partner band in 104Ag is investigated experimentally and theoretically. Lifetimes of states in the bands are measured and calculations are performed to unravel the intrinsic structures of these bands.
Article
Physics, Nuclear
Paul-Gerhard Reinhard, Witold Nazarewicz
Summary: In this study, the impact of local shell effects on the statistical correlations between quadrupole deformations and charge radii in Er, Yb, and Hf isotopes is investigated. The results show that the correlations between nuclear deformations and charge radii are affected by the underlying shell structure, and the correlation range is rather short even for well deformed nuclei.
Article
Physics, Nuclear
S. Jehangir, Nazira Nazir, G. H. Bhat, J. A. Sheikh, N. Rather, S. Chakraborty, R. Palit
Summary: By extending the triaxial projected shell model approach, this study investigates the rich band structures and the occurrence of signature inversion in odd-neutron systems, particularly in odd-mass Xe isotopes.
Article
Physics, Nuclear
Paul-Gerhard Reinhard, Witold Nazarewicz
Summary: Differences in charge radii of mirror nuclei are suggested to contain information on the slope of the symmetry energy. However, statistical correlation analysis shows that the difference in charge radii, Delta R-ch(mir), is an inferior indicator compared to other observables such as neutron skin or electric dipole polarizability. The presence of pairing correlations and low-lying proton continuum affects Delta R-ch(mir). Therefore, the precise data on mirror charge radii cannot provide a stringent constraint on the slope of the symmetry energy L.
Article
Physics, Nuclear
Markus Kortelainen, Zhonghao Sun, Gaute Hagen, Witold Nazarewicz, Thomas Papenbrock, Paul-Gerhard Reinhard
Summary: The radii of nuclear charge distributions provide information about the forces inside the atomic nucleus. The global behavior of nuclear charge radii is determined by nuclear matter properties, while the local trends are influenced by the motion of protons and neutrons. By analyzing even-even nuclei from calcium to zinc, two advanced theories based on nuclear interactions reveal a universal pattern and demonstrate the impact of nuclear properties and shell structure on the differential charge radii.
Article
Physics, Nuclear
Jhilam Sadhukhan, Samuel A. Giuliani, Witold Nazarewicz
Summary: This paper introduces a global modeling approach to fission fragment distributions and investigates the effects of odd-even staggering in charge yields and neutron evaporation. The results show that this approach can accurately predict the mass and charge yields of fissioning nuclei, including the odd-even staggering. The method also successfully describes the isotopic yields and provides insights into the fragment distributions of neutron-rich and superheavy systems.
