Nuclear Theory·nucl-th

Thursday·May 25, 2023

7 papers—3 primary·4 cross-listed

01
[Submitted on 24 May 2023]
Ab initio study of nuclear clustering in hot dilute nuclear matter
Zhengxue Ren · Serdar Elhatisari · Timo A. Lähde · Dean Lee · Ulf-G. Meißner
We present a systematic ab initio study of clustering in hot dilute nuclear matter using nuclear lattice effective field theory with an SU(4)-symmetric interaction. We introduce a method called light-cluster distillation to determine the abundances of dimers, trimers, and alpha clusters as a function of density and temperature. Our lattice results are compared with an ideal gas model composed of free nucleons and clusters. Excellent agreement is found at very low density, while deviations from ideal gas abundances appear at increasing density due to cluster-nucleon and cluster-cluster interactions. In addition to determining the composition of hot dilute nuclear matter as a function of density and temperature, the lattice calculations also serve as benchmarks for virial expansion calculations, statistical models, and transport models of fragmentation and clustering in nucleus-nucleus collisions.
Comments:
6+8 pages, 4+8 figures
Subjects:
Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph); Nuclear Experiment (nucl-ex)
arXiv:
2305.15037 [pdf]
PLB(2024)·37 citations
02
[Submitted on 24 May 2023]
Electric $1^{+}$ state below nuclear scissors
E.B. Balbutsev · I.V. Molodtsova
The solution of time dependent Hartree-Fock-Bogoliubov equations by the Wigner function moments method predicts four low-lying $1^{+}$ states. Three of them are known as various scissors modes. Fourth state is disposed below all scissors modes and has the electrical nature. It is found that it represents one of three branches of $2^{+}$ state which can exist in spherical nuclei and which is split in deformed nuclei. It is discovered, that the antiferromagnetic properties of nuclei lead to the splitting of $2^{+}$ states already at the zero deformation.
Comments:
20 pages, 5 figures, 2 tables
Subjects:
Nuclear Theory (nucl-th)
arXiv:
2305.15039 [pdf]
EPJA(2023)·4 citations
03
[Submitted on 24 May 2023]
Systematic shell-model study for structure and isomeric states in $^{200 - 210}$ Po isotopes
Sakshi Shukla · Praveen C. Srivastava · Kosuke Nomura · Larry Zamick
We report systematic large-scale shell-model calculation for Po isotopes with $A =$ 200 to 210. We have performed calculations using KHH7B interaction in the model space $Z$ = 58-114 and $N$ = 100-164 around doubly-magic $^{208}$ Pb. We allow valence neutrons to occupy in the $1 f_{5/2}$ , $2 p_{3/2}$ , $2 p_{1/2}$ , and $0 i_{13/2}$ orbitals, while two valence protons beyond $Z = 82$ are occupied in $0 h_{9/2}$ , $1 f_{7/2}$ and $0 i_{13/2}$ orbitals. The calculated energies and electromagnetic properties are compared with the available experimental data and predicted where experimental data are not available. We have also reported shell-model results for different isomeric states of these nuclei.
Comments:
35 pages, 12 figures
Subjects:
Nuclear Theory (nucl-th); Nuclear Experiment (nucl-ex)
arXiv:
2305.15131 [pdf]
NPA(2024)·5 citations

Affiliations

first authorsco-authorsvia INSPIRE

Ab initio study of nuclear clustering in hot dilute nuclear matter

Electric 1+ state below nuclear scissors

Systematic shell-model study for structure and isomeric states in 200−210Po isotopes

Affiliations

Electric $1^{+}$ state below nuclear scissors

Systematic shell-model study for structure and isomeric states in $^{200 - 210}$ Po isotopes