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Title: Delayed neutron yields: Time dependent measurements and a predictive model

Abstract

The delayed neutrons from neutron-induced fission in /sup 232/U, /sup 237/Np, /sup 238/Pu, /sup 241/Am, /sup 242/Am/sup m/, /sup 245/Cm, and /sup 249/Cf were studied for the first time; those from /sup 232/Th, /sup 233/U, /sup 235/U, /sup 238/U, /sup 239/Pu, /sup 241/Pu, and /sup 242/Pu were measured again. The data were used to develop an expression for the prediction of the absolute delayed neutron yield, and the prediction of delayed neutron emission with time. This approach accurately predicts observed delayed neutron yields and decay characteristics. A fission product yield model was used in conjunction with delayed neutron emission probability to analytically predict delayed neutron characteristics. The results of this analysis are in excellent agreement with experimental values.

Authors:
; ;
Publication Date:
Research Org.:
Nuclear Chemistry Division, Lawrence Livermore National Laboratory, Livermore, California 94550
OSTI Identifier:
6633172
Alternate Identifier(s):
OSTI ID: 6633172
Resource Type:
Journal Article
Journal Name:
Phys. Rev., C; (United States)
Additional Journal Information:
Journal Volume: 23:3
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; AMERICIUM 241 TARGET; NEUTRON REACTIONS; AMERICIUM 242 TARGET; CALIFORNIUM 249 TARGET; CURIUM 245 TARGET; NEPTUNIUM 237 TARGET; FISSION; PLUTONIUM 238 TARGET; PLUTONIUM 239 TARGET; PLUTONIUM 241 TARGET; PLUTONIUM 242 TARGET; THORIUM 232 TARGET; URANIUM 232 TARGET; URANIUM 233 TARGET; URANIUM 235 TARGET; URANIUM 238 TARGET; CROSS SECTIONS; DELAYED NEUTRONS; TIME DEPENDENCE; BARYON REACTIONS; BARYONS; ELEMENTARY PARTICLES; FERMIONS; FISSION NEUTRONS; HADRON REACTIONS; HADRONS; NEUTRONS; NUCLEAR REACTIONS; NUCLEON REACTIONS; NUCLEONS; TARGETS 652026* -- Nuclear Properties & Reactions, A=220 & above, Experimental-- Spontaneous & Induced Fission-- (-1987); 653007 -- Nuclear Theory-- Nuclear Models-- (-1987)

Citation Formats

Waldo, R.W., Karam, R.A., and Meyer, R.A. Delayed neutron yields: Time dependent measurements and a predictive model. United States: N. p., 1981. Web. doi:10.1103/PhysRevC.23.1113.
Waldo, R.W., Karam, R.A., & Meyer, R.A. Delayed neutron yields: Time dependent measurements and a predictive model. United States. doi:10.1103/PhysRevC.23.1113.
Waldo, R.W., Karam, R.A., and Meyer, R.A. Sun . "Delayed neutron yields: Time dependent measurements and a predictive model". United States. doi:10.1103/PhysRevC.23.1113.
@article{osti_6633172,
title = {Delayed neutron yields: Time dependent measurements and a predictive model},
author = {Waldo, R.W. and Karam, R.A. and Meyer, R.A.},
abstractNote = {The delayed neutrons from neutron-induced fission in /sup 232/U, /sup 237/Np, /sup 238/Pu, /sup 241/Am, /sup 242/Am/sup m/, /sup 245/Cm, and /sup 249/Cf were studied for the first time; those from /sup 232/Th, /sup 233/U, /sup 235/U, /sup 238/U, /sup 239/Pu, /sup 241/Pu, and /sup 242/Pu were measured again. The data were used to develop an expression for the prediction of the absolute delayed neutron yield, and the prediction of delayed neutron emission with time. This approach accurately predicts observed delayed neutron yields and decay characteristics. A fission product yield model was used in conjunction with delayed neutron emission probability to analytically predict delayed neutron characteristics. The results of this analysis are in excellent agreement with experimental values.},
doi = {10.1103/PhysRevC.23.1113},
journal = {Phys. Rev., C; (United States)},
number = ,
volume = 23:3,
place = {United States},
year = {1981},
month = {3}
}