QRAP: A numerical code for projected (Q)uasiparticle (RA)ndom (P)hase approximation
A computer code for quasiparticle random phase approximation - QRPA and projected quasiparticle random phase approximation - PQRPA models of nuclear structure is explained in details The residual interaction is approximated by a simple delta-force An important application of the code consists in evaluating nuclear matrix elements involved in neutrino-nucleus reactions. As an example, cross sections for Fe-56 and C-12 are calculated and the code output is explained The application to other nuclei and the description of other nuclear and weak decay processes are also discussed. Program summary Title of program QRAP (Quasiparticle RAndom Phase approximation) Computers The code has been created on a PC, but also runs on UNIX or LINUX machines Operating systems WINDOWS or UNIX Program language used Fortran-77 Memory required to execute with typical data 16 Mbytes of RAM memory and 2 MB of hard disk space No of lines in distributed program, including test data, etc similar to 8000 No of bytes in distributed program, including test data, etc similar to 256 kB Distribution format tar gz Nature of physical problem. The program calculates neutrino- and antineutrino-nucleus cross sections as a function of the incident neutrino energy, and moun capture rates, using the QRPA or PQRPA as nuclear structure models Method of solution The QRPA. or PQRPA. equations are solved in a self-consistent way for even-even nuclei The nuclear matrix elements for the neutrino-nucleus interaction are treated as the beta inverse reaction of odd-odd nuclei as function of the transfer momentum Typical running tune approximate to 5 min on a 3 GHz processor for Data set 1 (C) 2010 Elsevier B.V All rights reserved
qrpa projected qrpa semileptonic processes