Isospin-projected nuclear level densities by the shell model Monte Carlo method

Journal Article · Sat Nov 15 00:00:00 EST 2008 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.78.051304· OSTI ID:21199344

Nakada, H ^[1]; Alhassid, Y ^[2]

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1. Department of Physics, Graduate School of Science, Chiba University, Inage, Chiba 263-8522 (Japan)
2. Center for Theoretical Physics, Yale University, New Haven, Connecticut 06520 (United States)

We have developed an efficient isospin projection method in the shell model Monte Carlo approach for isospin-conserving Hamiltonians. For isoscalar observables this method has the advantage of being exact sample by sample. It allows us to take into account the proper isospin dependence of the nuclear interaction, thus avoiding a sign problem that such an interaction introduces in unprojected calculations. We apply the method to calculate the isospin dependence of level densities in the complete pf+g{sub 9/2} shell. We find that isospin-dependent corrections to the total level density are particularly important for N{approx}Z nuclei.

• OSTI ID: 21199344
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 78, Issue 5; Other Information: DOI: 10.1103/PhysRevC.78.051304; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CORRECTIONS
ENERGY-LEVEL DENSITY
HAMILTONIANS
INTERACTIONS
ISOSPIN
MONTE CARLO METHOD
NUCLEI
SHELL MODELS