PSR-0130 MATXUF.

1. NAME OR DESIGNATION OF PROGRAM:  MATXUF.
NE-213 Liquid Scintillator, Proton Recoil Unfolding Matrix Generator

3. DESCRIPTION OF PROBLEM OR FUNCTION

The MATXUF code generates an "unfolding matrix" for the analysis of NE-213 liquid scintillation proton recoil spectra. This unfolding matrix can be used in either an off-line or an on-line unfolding environment. For off-line application, unfolding can be accomplished by simple multiplication  of the proton recoil vector times the unfolding matrix. For on-line  application, the unfolding is accomplished one detected recoil proton at a time by using a small computer (in which the matrix has  been stored) interfaced to the detection system.

4. METHOD OF SOLUTION

The many channel, radiation spectrum unfolding  problem remains a basic problem for radiation detection and analysis. In particular, the unfolding of fast-neutron induced proton recoil data has been solved by a variety of techniques. The technique used in this code uses the derivative method of unfolding  which assumes an ideal, theoretical step function relationship between incoming neutrons and the resulting proton recoil distribution. This ideal function is corrected for anisotropic scattering and proton leakage. This code also includes a smoothing technique applied directly to the unfolded result which improves energy identification and results in the ultimate generation of an unfolding matrix.

5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM:

6. TYPICAL RUNNING TIME:  10 seconds of CPU.

7. UNUSUAL FEATURES OF THE PROGRAM:

8. RELATED AND AUXILIARY PROGRAMS:

10. REFERENCES

- "MATXUF: On-Line, Real Time Derivative Method Neutron Spectrum
           Unfolding"
  Trans. Am. Nucl. Soc., 26 (June 1977).
- "MATXUF: On-Line, Real Time Derivative Method Neutron Spectrum
           Unfolding"
  Nuclear Instruments and Methods, 153, 535-541 (1978).

11. MACHINE REQUIREMENTS

The computer core requirement for MATXUF is 320K for a typical case. This allows for up to 256 input data bins (or rows in the matrix) and up to 120 output data bins (or columns in the matrix). The creation of larger unfolding matrices may require additional core requirements.

13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:

14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:

15. NAME AND ESTABLISHMENT OF AUTHOR

Nuclear Engineering Department
University of Missouri-Columbia
Columbia, Missouri 65211

File name	File description	Records
PSR0130_01.001	INFORMATION	12
PSR0130_01.002	JCL	6
PSR0130_01.003	SOURCE (F4,EBCDIC)	759
PSR0130_01.004	DD CARDS	2
PSR0130_01.005	INPUT DATA FOR S.P.	111
PSR0130_01.006	PRINTED OUTPUT OF S.P.	429