TY - JOUR

T1 - High-performance algorithm to calculate spin- and parity-dependent nuclear level densities

AU - Sen'Kov, R. A.

AU - Horoi, M.

PY - 2010/8/3

Y1 - 2010/8/3

N2 - A new algorithm for calculating the spin- and parity-dependent shell-model nuclear level densities using the moments method in the proton-neutron formalism is presented. A new, parallelized code based on this algorithm was developed and tested using up to 4000 cores for a set of nuclei from the sd-, pf-, and pf+g9/2-model spaces. By comparing the nuclear level densities at low excitation energy for a given nucleus calculated in two model spaces, such as pf and pf+g9/2, one can estimate the ground-state energy in the larger model space, which is not accessible to direct shell-model calculations due to the unmanageable dimension. Examples for the ground-state energies of for Ge64 and Se68 in the pf+g9/2 model space are presented.

AB - A new algorithm for calculating the spin- and parity-dependent shell-model nuclear level densities using the moments method in the proton-neutron formalism is presented. A new, parallelized code based on this algorithm was developed and tested using up to 4000 cores for a set of nuclei from the sd-, pf-, and pf+g9/2-model spaces. By comparing the nuclear level densities at low excitation energy for a given nucleus calculated in two model spaces, such as pf and pf+g9/2, one can estimate the ground-state energy in the larger model space, which is not accessible to direct shell-model calculations due to the unmanageable dimension. Examples for the ground-state energies of for Ge64 and Se68 in the pf+g9/2 model space are presented.

UR - http://www.scopus.com/inward/record.url?scp=77956135685&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.82.024304

DO - 10.1103/PhysRevC.82.024304

M3 - Article

AN - SCOPUS:77956135685

SN - 0556-2813

VL - 82

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

IS - 2

M1 - 024304

ER -