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ESTS0827 UNSPEC.

UNSPEC, X-Ray Spectrum Unfolding

NAME OR DESIGNATION OF PROGRAM, COMPUTER, DESCRIPTION OF PROGRAM OR FUNCTION, 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 UNDER WHICH PROGRAM IS EXECUTED, OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS, NAME AND ESTABLISHMENT OF AUTHORS, MATERIAL, CATEGORIES
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1. NAME OR DESIGNATION OF PROGRAM:  UNSPEC (Unfolding X-Ray
Spectrums).
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2. COMPUTERS
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Program name Package id Status Status date
UNSPEC ESTS0827/01 Arrived 06-AUG-2001

Machines used:

Package ID Orig. computer Test computer
ESTS0827/01 CRAY 1
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3. DESCRIPTION OF PROGRAM OR FUNCTION

UNSPEC is used to solve the problem of unfolding an observed X-ray spectrum given the response matrix of the measuring system and the measured signal valued.
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4. METHOD OF SOLUTION

UNSPEC uses an iterative technique to solve the unfold problem. Qualitatively, the solution proceeds as follows: 1.  Choose a trial spectrum consistent with the experiments criterion for smoothness, 2. Fold this spectrum with the known response matrix, 3. Compare the measured and calculated signal values, 4. Adjust the trial spectrum in order to improve the agreement between  the measured and calculated signal values, 5. Repeat steps 1-4 until the final result is consistent with the measured signal values to some arbitrary criterion selected by the experimenter.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM:
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6. TYPICAL RUNNING TIME:
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7. UNUSUAL FEATURES OF THE PROGRAM:
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8. RELATED AND AUXILIARY PROGRAMS:
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9. STATUS
Package ID Status date Status
ESTS0827/01 06-AUG-2001 Masterfiled Arrived
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10. REFERENCES:
ESTS0827/01, included references:
- H.F. Finn:
  UNSPEC Reference Manual version 10/29/82
  UCID-19616 (December 1, 1982)
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11. MACHINE REQUIREMENTS:
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
ESTS0827/01 LLNL-FORTRAN
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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:  Machine
dependent.
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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:
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15. NAME AND ESTABLISHMENT OF AUTHORS

    H.F. Finn
    Lawrence Livermore National Lab., CA (United States)
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16. MATERIAL AVAILABLE
ESTS0827/01
source program   mag tapeUNSPEC.SUB Source code                     SRCTP
test-case data   mag tapeUNSPEC.CAR Sample problem (cards)          DATTP
test-case data   mag tapeUNSPEC.SOC Sample problem (sock)           DATTP
report                   UCID-19616 (December 1, 1982)              REPPT
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17. CATEGORIES
  • O. Experimental Data Processing
  • W. Physics

Keywords: gamma detectors, radiation detectors, spectra unfolding, x-rays.