Moments Method for Shell-Model Level Density

[摘要] The modern form of the Moments Method applied to the calculation of the nuclear shell-model level density is explained and examples of the method at work are given. The calculated level density practically exactly coincides with the result of full diagonalization when the latter is feasible. The method provides the pure level density for given spin and parity with spurious center-of-mass excitations subtracted. The presence and interplay of all correlations leads to the results different from those obtained by the mean-field combinatorics.

[发布机构] Department of Physics and Astronomy, National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing; MI; 48824-1321, United States^1;Department of Physics, Central Michigan University, Mount Pleasant; MI; 48859, United States^2

[效力级别] 天文学 [学科分类] 天文学(综合)

[关键词] Center of mass;Combinatorics;Diagonalizations;Level density;Mean field;Moments method;Nuclear shell model;Shell models