Delayed neutron spectra by decay group for fissioning systems from /sup 227/Th through /sup 255/Fm

Conference · Fri Jan 01 00:00:00 EST 1988

OSTI ID:6907219

England, T R; Brady, M C

The quality and quantity of delayed neutron precursor data has greatly improved over the past approximately 15 years. Supplementation of the data with model calculations and the use of models to extend the number of precursors to 271 is now practical. These data, along with improved fission-product parameters, permit direct calculations of aggregate behavior for many fissioning nuclides. The results can even be approximated using a few (usually six) temporal groups. This paper summarizes an extensive four-year effort to provide a complete set of evaluated data and emphasizes its use to generate the temporal approximations; precursor data and group values are intended for inclusion in ENDF/B-VI. 19 refs., 8 figs., 1 tab.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 6907219
• Report Number(s): LA-UR-88-2140; CONF-880911-10; ON: DE88014408
• Resource Relation: Conference: International reactor physics conference, Jackson Hole, WY, USA, 18 Sep 1988; Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
NUCLEAR DATA COLLECTIONS
NEUTRON SPECTRA
DATA BASE MANAGEMENT
DELAYED NEUTRON ANALYSIS
EXPERIMENTAL DATA
FISSILE MATERIALS
THEORETICAL DATA
CHEMICAL ANALYSIS
DATA
FISSIONABLE MATERIALS
INFORMATION
MANAGEMENT
MATERIALS
NONDESTRUCTIVE ANALYSIS
NUCLEAR REACTION ANALYSIS
NUMERICAL DATA
SPECTRA
651000* - Nuclear Physics