Practical solution to the Monte Carlo sign problem: Realistic calculations of [sup 54]Fe

Journal Article · Mon Jan 31 00:00:00 EST 1994 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.72.613· OSTI ID:5237939

Alhassid, Y; Dean, D J; Koonin, S E; Lang, G; Ormand, W E ^[1]

---

1. W. K. Kellogg Radiation Laboratory, 106-38, California Institute of Technology, Pasadena, California 91125 (United States)

We present a practical solution to the sign problem'' in the auxiliary field Monte Carlo approach to the nuclear shell model. The method is based on extrapolation from a continuous family of problem-free Hamiltonians. To demonstrate the resultant ability to treat large shell-model problems, we present results for the [sup 54]Fe in the full [ital fp]-shell basis using the Brown-Richter interaction. We find the Gamow-Teller [beta][sup +] strength to be quenched by 58% relative to the single-particle estimate, in better agreement with experiment than previous estimates based on truncated bases.

• DOE Contract Number: FG02-91ER40608
• OSTI ID: 5237939
• Journal Information: Physical Review Letters; (United States), Vol. 72:5; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
SHELL MODELS
IRON 54
EXTRAPOLATION
GAMOW-TELLER RULES
HAMILTONIANS
MONTE CARLO METHOD
NUMERICAL SOLUTION
CALCULATION METHODS
EVEN-EVEN NUCLEI
INTERMEDIATE MASS NUCLEI
IRON ISOTOPES
ISOTOPES
MATHEMATICAL MODELS
MATHEMATICAL OPERATORS
NUCLEAR MODELS
NUCLEI
QUANTUM OPERATORS
STABLE ISOTOPES
663120* - Nuclear Structure Models & Methods- (1992-)
663540 - Nuclear Mass Ranges- A=39-58- (1992-)