Automated angular momentum recoupling algebra

Conference · Mon Jan 01 00:00:00 EST 1990

DOI:https://doi.org/10.1016/0021-9991(92)90291-6· OSTI ID:6897120

Williams, H T ^[1]; Silbar, R R ^[2]

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1. Washington and Lee Univ., Lexington, VA (USA). Dept. of Physics
2. Los Alamos National Lab., NM (USA)

We describe a code, RACAH, for algebraic solution of angular momentum recoupling problems. The general problem is to find an optimal path from one binary tree (representing the angular momentum coupling scheme for the reduced matrix element) to another (representing the sub-integrals and spin sums to be done). RACAH is implemented on a MS-DOS microcomputer, using the SCHEME dialect of LISP. 6 refs.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: DOE/ER
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 6897120
• Report Number(s): LA-UR-90-1933; CONF-9003167-1; ON: DE90011988
• Resource Relation: Journal Volume: 99; Journal Issue: 1; Conference: Lyon workshop, Lyon (France), 19-24 Mar 1990
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
RACAH COEFFICIENTS
COMPUTER CALCULATIONS
ANGULAR MOMENTUM
AUTOMATION
MATRIX ELEMENTS
PERSONAL COMPUTERS
R CODES
COMPUTER CODES
COMPUTERS
DIGITAL COMPUTERS
MICROCOMPUTERS
657002* - Theoretical & Mathematical Physics- Classical & Quantum Mechanics
990200 - Mathematics & Computers