PSR-0267 SCINFUL.

1. NAME OR DESIGNATION OF PROGRAM:  SCINFUL.
(Scintillator Full Response to Neutron Detection).

3. DESCRIPTION OF PROGRAM OR FUNCTION

SCINFUL uses a few programming  techniques of its parent program 05S and includes several new features. SCINFUL is designed to provide a calculated full response  anticipated for neutron interactions in either an NE-213 (liquid) or NE-110 (solid) cylindrical detector using Monte Carlo methods. Given a right-circular scintillation neutron detector of either NE-213 or  NE-110, SCINFUL computes the full energy response, N(E) vs E, where  E is a value of pulse height converted to "light", units. These units are defined in the program. Pulse-height predictions of the code have been compared with measured responses for incident neutron energies between 0.1 and 75 MeV, and the predictions are in good agreement with the measurements.

4. METHOD OF SOLUTION

In the first part of the calculation Monte Carlo techniques and tabulated cross sections for H and energetically available 12C reactions are utilized to determine if an interaction of an incident neutron occurs in the detector. If so, information of this interaction is stored, including coordinates of  the collision spot, the direction cosines of the scattered neutron or other light ion, the energy of the colliding neutron, and the particular reaction type. The second part of the calculation follows the history of each colliding neutron, again using Monte Carlo methods, until either the neutron escapes the detector, or loses sufficient energy with respect to an input value, or is absorbed.

5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

The detector shape must have cylindrical geometry. No external influences (e.g. light piping or canning material) are considered. The range of incident neutron energy is 0.1 to 80 MeV. Only the scintillators NE-213 and NE-110 are considered (although NE-102 is sufficiently similar to NE-110 that one may use NE-110 for comparisons to NE-102 responses). Although gamma-ray interactions are included as part of the total neutron response, program computation for gamma radiation is quite approximate. Present program dimensions limit any computation to a maximum of 100000 histories.

6. TYPICAL RUNNING TIME

On the VAX 8600 running under VAX/VMS Version 4.7, SCINFUL takes about 11 minutes to execute the sample problem. SCINSPEC only takes a few seconds. For a maximum of 100000 histories, approximately 30 CPU minutes on the VAX 11/785 is required. The sample problem ran in about 30 seconds on the CRAY XMP-2.

NEA-DB ran the test case included in this package on a  DEC VAX 6000-510 computer in approximately 168 seconds of CPU time.

7. UNUSUAL FEATURES OF THE PROGRAM:

8. RELATED AND AUXILIARY PROGRAMS

SCINSPEC: Reformat SCINFUL Output into Standard Spectrum.
O5R: Parent program of SCINFUL.

10. REFERENCES:

- J.K. Dickens:
  SCINFUL - A Monte Carlo Based Computer Program to Determine a
  Scintillator Full Energy Response to Neutron Detection for En
  Between 0.1 and 80 MeV: User's Manual and FORTRAN Program Listing
  ORNL-6462 (March 1988).
- J.K. Dickens:
  SCINFUL - A Monte Carlo Based Computer Program to Determine a
  Scintillator Full Energy Response to Neutron Detection for En
  Between 0.1 and 80 MeV: Program Development and Comparisons of
  Program Predictions with Experimental Data
  ORNL-6463 (April 1988).

11. MACHINE REQUIREMENTS

SCINFUL was developed on the VAX 11/785 and tested on an 8600. The Cray version was converted and tested on a CRAY X-MP.

13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED

A FORTRAN 77 compiler is required. VAX/VMS FORTRAN recognizes eight-character descriptors, and many are used throughout the program. Standard trigonometric and other library functions are required. Also needed  is a library random-number generator, called RAN(K) in this program. An initial value for K must be specified. A VAX/VMS function IDATE,  which returns today's date, is called. The CRAY version was run under the CTSS operating system using the CFT compiler linked to the CFTLIB library.

At the NEA-DB the program was compiled with the VAX FORTRAN-77 compiler and executed under VMS 5.5-2.

14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:

15. NAME AND ESTABLISHMENT OF AUTHORS

Contributed by: Radiation Safety Information Computational Center
                Oak Ridge National Laboratory
                Oak Ridge, Tennessee, U. S. A.

Developed by:
                Oak Ridge National Laboratory
                Oak Ridge, Tennessee, and
                Los Alamos National Laboratory
                Los Alamos, New Mexico

File name	File description	Records
PSR0267_01.001	SCINFUL Information file	183
PSR0267_01.002	Notes on the SCINFUL program	402
PSR0267_01.003	Source code file of program SCINFUL	188
PSR0267_01.004	Source code file of program SCINSPEC	105
PSR0267_01.005	Routines for Li->X+alpha decay energetics	292
PSR0267_01.006	Bookkeping+output control routine	1071
PSR0267_01.007	Electron range <-> energy relation routine	53
PSR0267_01.008	"Miscellaneous" routines	938
PSR0267_01.009	"Miscellaneous" routines	675
PSR0267_01.010	"Miscellaneous" routines	531
PSR0267_01.011	Legendre coeff. for n+12C elastic scattering	508
PSR0267_01.012	Source code of routines for n+12C kinematics	2656
PSR0267_01.013	"Miscellaneous" routines	455
PSR0267_01.014	Cross-section routines for n+12C->X reaction	497
PSR0267_01.015	"Miscellaneous" routines	441
PSR0267_01.016	Command file to compile the FORTRAN sources	3
PSR0267_01.017	Command file to create the executable files	4
PSR0267_01.018	Sample input file to the SCINFUL program	7
PSR0267_01.019	Sample output file from the SCINFUL program	580
PSR0267_01.020	SCINSPEC sample input file (SCINFUL output)	442
PSR0267_01.021	SCINSPEC sample output file	516