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IAEA1175 GRAP.

GRAP, Gamma-Ray Level-Scheme Assignment

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1. NAME OR DESIGNATION OF PROGRAM:  GRAP.
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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
GRAP IAEA1175/01 Tested 18-JUL-2002

Machines used:

Package ID Orig. computer Test computer
IAEA1175/01 IBM PC PC Pentium III
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3. DESCRIPTION OF PROGRAM OR FUNCTION

An interactive program for allocating gamma-rays to an energy level scheme.
Procedure allows for searching for new candidate levels of the form:  1) L1 + G(A) + G(B) = L2
2) G(A) + G(B) = G(C)
3) G(A) + G(B) = C                (C is a user defined number)
4) L1 + G(A) + G(B) + G(C) = L2
Procedure indicates intensity balance of feed and decay of each energy level. Provides for optimization of a level energy (and associated error). Overall procedure allows for pre-defining of certain gamma-rays as belonging to particular regions of the level scheme, for example, high energy transition levels, or due to beta-  decay.
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4. METHOD OF SOLUTION

Search for cases in which the energy difference between two energy levels is equal to a gamma-ray energy within user-defined limits.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

Maximum number of gamma-rays      :   999
Maximum gamma ray energy          : 32000 units
Minimum gamma ray energy          :    10 units
Maximum gamma-ray intensity       : 32000 units
Minimum gamma-ray intensity       : 0.001 units
Maximum number of levels          :   255
Maximum level energy              : 32000 units
Minimum level energy              :    10 units
Maximum error on energy, intensity:    32 units
Minimum error on energy, intensity: 0.001 units
Maximum number of combinations    :  6400 (ca)
Maximum number of gamma-ray types :   127
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6. TYPICAL RUNNING TIME

Highly dependent on the number of transitions to be allocated and errors used. To generate the initial scheme (CRAG1) takes typically 10-15 minutes for 800 gamma-rays fitting to  120 levels.
IAEA1175/01
interactive programs; almost instantaneous responses.
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7. UNUSUAL FEATURES OF THE PROGRAM

Intensity balance display of the feeding level and decaying level for particular transition gamma-ray energies.
Selective inclusion/removal of gamma-rays in multiple fit situation.
Ability to force fit of gamma-ray even though errors dictate outside acceptance window.
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8. RELATED AND AUXILIARY PROGRAMS

   TRED - Raw data input, and edit, program.
  GRAG1 - Preliminary assignment program.
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9. STATUS
Package ID Status date Status
IAEA1175/01 18-JUL-2002 Tested at NEADB
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10. REFERENCES

- C. Hofmeyr et al:
  74GE: Transitions and Levels Excited in Thermal-Neutron Capture
  AIP Conference Proceedings No. 125 - Capture Gamma-Ray
  Spectrometry and Related Topics  - 1984.
  Edited by S. Raman , pages 378-381.
IAEA1175/01, included references:
- C.B. Franklyn:
  GRAP - Gamma Ray Allocations Program - A User's Guide
  PEL-286 (May 1985)
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11. MACHINE REQUIREMENTS

HP-version: HP-1000 series minicomputer, 192 Kbytes memory, disc drive, magnetic tape, terminal/monitor.
PC-version: IBM-PC XT or compatible, 512 Kbytes RAM, disc drive, printer, maths coprocessor (optional).
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
IAEA1175/01 FORTRAN
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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED

HP version: Designed on RTE-IV B system, runs on RTE-VI.
PC version: MS-DOS 3.2 or higher.
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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

HP version: makes system calls to LOGLU, EXEC, OPEN, READF, WRITF, CLOSE, RMPAR, LURQ, IFBRK, FTIME. The printer for which the program  was originally designed was a HP7310A.
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15. NAME AND ESTABLISHMENT OF AUTHORS

          Dr. C.B. Franklyn
          Nuclear Energy Systems
          Atomic Energy Corporation of South Africa
          P.O. Box 582, Pretoria, South Africa
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16. MATERIAL AVAILABLE
IAEA1175/01
miscellaneous    mag tapeREADME File                                MISTP
source program   mag tapeGRAP Source Programs (HP Computer) (FTN4)  SRCTP
source program   mag tapeGRAG1 Source Programs (HP Computer) (FTN4) SRCTP
source program   mag tapeTRED Source Programs (HP Computer) (FTN4)  SRCTP
test-case data   mag tapeGRAPEM Data File (HP Computer)             DATTP
test-case data   mag tapeTREDED Data File (HP Computer)             DATTP
source program   mag tape1TRED Source Program (IBM PC/XT)           SRCTP
source program   mag tape1CRAG1 Source Program (IBM PC/XT)          SRCTP
source program   mag tape1GRAP Source Program (IBM PC/XT)           SRCTP
test-case data   mag tapeTREDED Data File (IBM PC/XT)               DATTP
test-case data   mag tapeGRAPEM Data File (IBM PC/XT)               DATTP
test-case data   mag tapeTREDTEST/CRAGTEST/GRAPTEST Data Files      DATTP
test-case output listing README.TXT from DISC 1 & 2                 OUTLS
test-case output listing Source Programs (4 files)                  OUTLS
test-case data   listing Data for TRED                              DATLS
test-case output listing Sample Output from GRAP                    OUTLS
test-case output listing Sample Output from GRAG                    OUTLS
report                   PEL-286 (May 1985)                         REPPT
&cofl.for Subroutine
&crag1.for Subroutine
&danp.for Subroutine
&grap.for Subroutine
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17. CATEGORIES
  • O. Experimental Data Processing

Keywords: gamma spectra, multilevel analysis, spectra unfolding.