last modified: 27-APR-1983 | catalog | categories | new | search |

IAEA0877 GASPAN-ZKD.

GASPAN-ZKD, Ge(Li) Detector and Multichannel Analyser Gamma Spectra Unfolding

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1. NAME OR DESIGNATION OF PROGRAM:  GASPAN-ZKD.
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2. COMPUTERS
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Program name Package id Status Status date
GASPAN-ZKD IAEA0877/01 Tested 27-APR-1983

Machines used:

Package ID Orig. computer Test computer
IAEA0877/01 IBM 370/168 IBM 370/168
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3. NATURE OF PHYSICAL PROBLEM SOLVED

Analysis of gamma-ray spectra obtained by a Ge(Li) detector and a multichannel pulse-height analyser to determine energy and intensity of gamma-lines.
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4. METHOD OF SOLUTION

After smoothing the spectral data (approximation to a power function by least squares method) domains with significant negative second differences are determined which mark the position of the peaks. A Gaussian function plus a quadratic function is fitted to each peak. The program allows identifying unresolved multiple peaks. It is possible to fit simultaneously up to 5 peaks.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM:  Limited to spectra with 4096 channels and 100 peaks.
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6. TYPICAL RUNNING TIME

The running time depends on the number of channels and peaks and the demanded precision. The calculation for a spectrum with 1700 channels and 42 peaks requires 250 seconds of CPU-time.
NEA-DB executed the test case on IBM 370/168 in 5 CPU seconds.
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7. UNUSUAL FEATURES OF THE PROGRAM:  The programme uses an overlay structure.
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8. RELATED AND AUXILIARY PROGRAMS:  Random transfer system 'REX'.
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9. STATUS
Package ID Status date Status
IAEA0877/01 27-APR-1983 Tested at NEADB
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10. REFERENCES

- H.P. Yule:
  Mathematical Smoothing of Gamma Ray Spectra
  Nuclear Instruments and Methods, Vol. 54, 1967, no.1, pp. 61-65
- S.J. Mills:
'AUTSPAN' - A Computer Program for the Automatic Analysis of Gamma Ray Spectra
  CSIR Research Report 289, National Physical Research Laboratory,
  Pretoria (1969)
- M.A. Mariscotti:
  A Method for Automatic Identification of Peaks in the Presence of Background and Its Applications to Spectrum Analysis
  Nuclear Instruments and Methods, Vol. 50, 1967, pp. 309-320
IAEA0877/01, included references:
- B. Lindemann and M. Geisler:
  GASPAN - A program for automatic evaluation of gamma spectra with
  the help of photo peak analysis (in German) (December 1972)
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11. MACHINE REQUIREMENTS:  400K bytes of main storage on IBM 370/168.
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
IAEA0877/01 FORTRAN-IV
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13. OPERATING SYSTEM OR MONITOR UNDER WHICH PROGRAM IS EXECUTED:  OS370/081 using the FORTRAN-H-EXTENDED compiler.
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14. ANY OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:  Input of the spectral data by perforated tape.
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15. NAME AND ESTABLISHMENT OF AUTHOR

B.Lindemann, M.Geisler
Zentralinstitut fuer Isotopen und Strahlenforschung
DDR 705 Leipzig
Permoserstrasse 15.
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16. MATERIAL AVAILABLE
IAEA0877/01
File name File description Records
IAEA0877_01.003 GASPAN-ZKD INFORMATION FILE 41
IAEA0877_01.004 GASPAN-ZKD SOURCE (FORTRAN-4) 1145
IAEA0877_01.005 GASPAN-ZKD JCL 23
IAEA0877_01.006 GASPAN-ZKD INPUT FOR TEST CASE 214
IAEA0877_01.007 GASPAN-ZKD OUTPUT OF TEST CASE 38
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17. CATEGORIES
  • O. Experimental Data Processing

Keywords: Gauss function, Li-drifted ge detectors, gamma detectors, gamma spectra, least square fit, multi-channel analysers, radiation detectors.