IAEA0877 GASPAN-ZKD.

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

NAME OR DESIGNATION OF PROGRAM, COMPUTER, NATURE OF PHYSICAL PROBLEM SOLVED, METHOD OF SOLUTION, RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM, TYPICAL RUNNING TIME, UNUSUAL FEATURES OF THE PROGRAM, RELATED AND AUXILIARY PROGRAMS, STATUS, REFERENCES, MACHINE REQUIREMENTS, LANGUAGE, OPERATING SYSTEM OR MONITOR UNDER WHICH PROGRAM IS EXECUTED, ANY OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS, NAME AND ESTABLISHMENT OF AUTHOR, MATERIAL, CATEGORIES

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1. NAME OR DESIGNATION OF PROGRAM: GASPAN-ZKD.

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2. COMPUTERS

To submit a request, click below on the link of the version you wish to order. Only liaison officers are authorised to submit online requests. Rules for requesters are available here.

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.