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Nuclear physicists, have a look at Racah package!! 3rd release!
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week.ps --> it's a weekly agenda for your appointments and reminders.
tabul.ps --> a guitar scratch tabulate. If you are a guitar player and like to find out some song's riff this is very useful.
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swappa.for --> Utility that swap two columns of data in a text file (It has been written in 23 minutes so let me know all the bugs !!).
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The package contains the functions RACAH3J,RACAH6J, RACAH9J and CLEB that calculate all those coefficients (very important for nuclear physics and not only!). Complile it together with your codes. They are implemented using the formulae in "Nuclear Shell Theory" by deShalit-Talmi and other publications. They are really simple and well-working and allow for real antries (therefore the outputs are approximations, check them!!).
Short history of the package so far:
-Apr 2002: v.1 released
-Jun 2002: short function ELSPHAR (calculates the matrix elements of the spherical harmonic functions) and RELSPH (calculates the reduced matrix elements of spherical harmonics).
-Jun 2002: one bug fixed in ELSPHAR.
-Apr 2006: v.2 released with function RACAH3J and RACAH6J improved, both in speed and performance, by Antonio Mason.
-Jan 2007: v.3 released. RACAH9J improved to include simultaneous integer and half-integer entries. Error control added.
IRREP and IRHAR --> Two (trivial) codes to count the number of repetitions of a given "L" quantum number within a given "tau" q.n. (IRREP) for gamma-unstable cases or within the pricipal q. n. "N" (IRHAR) for the five dimensional harmonic oscillator in connection with the analytic solution of the Bohr hamiltonian [gosh..i know that a decent explanation would require some more comment, but I don't have so many MBytes in my account!]
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1) gives you the spectrum of a selected isotope
2) search for specified simple patterns in the whole database.
Very useful for quick lookups, not 100% reliable, due to restrictions in the database.
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