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Manuscript Title: EFYGA: a Monte Carlo program to compute the interaction probability and the counting efficiency of gamma rays in liquid scintillators.
Authors: E. Garcia-Torano, A. Grau Malonda
Program title: EFYGA
Catalogue identifier: ABBC_v1_0
Distribution format: gz
Journal reference: Comput. Phys. Commun. 47(1987)341
Programming language: Fortran.
Computer: VAX 11/785.
Operating system: VAX/VMS.
RAM: 15K words
Word size: 32
Keywords: Nuclear physics, Activity detection, Photon transport, Monte carlo codes, Liquid scintillation, Efficiency.
Classification: 17.6.

Nature of problem:
This program computes the interaction probability and the counting efficiency of gamma photons in toluene scintillators for a given energy.

Solution method:
The Compton-electron distribution produced by the gamma ray-scintillator interaction is simulated by means of a Montecarlo process. The counting efficiency is then computed by computing the efficiency for every point in the distribution and summing up to obtain the total efficiency.

Restrictions:
None.

Running time:
The test requires about 10 m of CPU time for a VAX 11/785 computer with the machine-independent random numbers generator. If the FORTRAN 'RAN' function is used in a VAX, the time is about 3 minutes.