α-spectrum analyzing program ALPS

A computer program was developed for the analysis of spectrum. The construction of the program is essentially the same as that of the γ-spectrum analyzing program BOB73S, except for the peak-fitting part. The α line shape function was approximated with a Gaussian on the high-energy side smoothly connected to an exponential function for the lose tail on the low-energy side. Parameters describing the line shape function was determined separately for individual peak compounds in the spectrum. The program size is 114k words and the speed of analysis is less than 10 sec by FACOM 230-75 for a spectrum with appropriate sharpness. Structure and functions of the program are described, and instructions are given on program usage. Reliability of the program was examined with α spectra obtained with plutonium isotopes and those constructed artificially with the single-peaked 210Po spectrum. (auth.)