RSIC COMPUTER CODE PSR-085
1. NAME AND TITLE
NAISAP: Theory and Use of Gamma-Ray Spectrum Analysis Codes for NaI(Tl) Detectors.
Japan Atomic Energy Research Institute, Tokai Research Establishment, Ibaraki-Ken, Japan.
3. CODING LANGUAGE AND COMPUTER
Fortran IV; FACOM 230-60.
4. NATURE OF PROBLEM SOLVED
NAISAP analyzes the NaI(Tl) gamma-ray spectrum and other types of spectra to determine the
energies and intensities of the peaks detected. The spectrum is plotted in option.
5. METHOD OF SOLUTION
The analysis is carried out by the photopeak method on the basis of the NaI(Tl) response function
represented in an analytical form. The peak search is based on the first derivative method accompanied
with various peak shape tests. The usual least squares method is adopted for resolving the complex of
peaks. Values of the parameters for constructing the NaI(Tl) response are stored as data for two
detector sizes: 1-3/4" phi x 2" and 3" phi x 3."
6. RESTRICTIONS OR LIMITATIONS
NAISAP accepts a spectrum of a maximum of 1024 channels with up to 49 peaks. Response
functions of detectors with dimensions different from those mentioned above must be given by the user
in specifying the parameters as functions of the photon energy.
7. TYPICAL RUNNING TIME
NAISAP requires approximately one second for the analysis of each peak.
8. COMPUTER HARDWARE REQUIREMENTS
NAISAP is operable on the FACOM 230-60 computer. A 76 K word memory is required. A
CALCOMP plotter is optional.
9. COMPUTER SOFTWARE REQUIREMENTS
A Fortran IV compiler is required.
H. Baba, T. Sekine, S. Baba, and H. Okashita, "A Method of the Gamma-Ray Spectrum Analysis: Fortran IV Programs 'BOB 73' for Ge(Li) Detectors and 'NAISAP' for NaI(Tl) Detectors," JAERI 1227 (June 1973).
T. Sekine, S. Baba, H. Baba, "Analytical Functions Representing Response Functions of NaI(Tl)
Detector Systems to Gamma Rays," ORNL-tr-2941/JAERI-M 4590 (September 1971).
11. CONTENTS OF CODE PACKAGE
Included are the referenced documents and one (1.2MB) DOS diskette which contains the source
code and sample problem input and output.
12. DATE OF ABSTRACT
KEYWORDS: DATA PROCESSING, SPECTRA; GAMMA-RAY SPECTRUM ANALYSIS; UNFOLDING