Computer Programs

ESTS0827 UNSPEC.

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	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.