1. NAME AND TITLE
BON: A Code System for Unfolding Multisphere Spectrometer Neutron Measurements.
Environmental Measurements Laboratory, U.S. Department of Energy, New York, New York.
3. CODING LANGUAGE AND COMPUTER
Fortran IV; IBM 360/370, CDC 6600.
4. NATURE OF PROBLEM SOLVED
BON unfolds neutron spectra from multisphere spectrometer measurements near particle
5. METHOD OF SOLUTION
An iterative technique is used to solve a matrix approximation of the homogeneous Fredholm
equation. BON yields a differential energy spectrum and, if the system is calibrated with a known
source, the integral of the spectrum is the total neutron fluence rate. Published flux-to-dose conversion
factors are folded into the spectrum to yield the absorbed dose and dose-equivalent rates.
6. RESTRICTIONS OR LIMITATIONS
7. TYPICAL RUNNING TIME
For a 25 group spectrum, BON runs in about 6 minutes on the IBM 360/370 computers.
8. COMPUTER HARDWARE REQUIREMENTS
BON is operable on the IBM 360/370 or the CDC 6600 computers. A printer is required.
9. COMPUTER SOFTWARE REQUIREMENTS
A Fortran IV compiler is required. A standard operating system is used.
R. S. Sanna, "A Manual for BON: A Code for Unfolding Multisphere Spectrometer Neutron
Measurements," EML-394 (August 1981).
11. CONTENTS OF CODE PACKAGE
Included are the referenced document and one (1.2MB) DOS diskette which contains the source
code and sample problem input and output.
12. DATE OF ABSTRACT