Delayed neutron emission from mass-separated fission products
- Iowa State Univ., Ames, IA (United States)
Thesis. Delayed neutron characteristics of six fission product nuclides were determined using a mass separator operated on-line with a nuclear reactor. Beta-decay half-lives were- measured using neutron multiscaling techniques for the precursors 88Br, 89Br, 98Kr, 93Kr, 137I, and 138I. The observed half-lives were 16.52 plus or minus .17 seconds, respectively.. Energy spectra were measured for delayed neutrons emitted in the beta-decays of 17N, 137I, 93Kr , and 93Rb. The spectra of neutron emissions in the mass 93 parentdaughter decay chain were observed using a moving tape collector to effect isobaric separation. Two different types of 3He- filled neutron spectrometer were used to determine the spectra; a proportional counter with risetime discrimination electronics, and a high resolution ionization chamber. The measured delayed, neutron spectra using both detector types are presented, and the results compared, where possible, with other reported measurements.
- Research Organization:
- Ames Lab., Ames, IA (United States)
- Sponsoring Organization:
- US Atomic Energy Commission (AEC)
- DOE Contract Number:
- W-7405-ENG-82
- NSA Number:
- NSA-29-025566
- OSTI ID:
- 4345590
- Report Number(s):
- IS-T--627
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
*BROMINE 88-- BETA-MINUS DECAY
*BROMINE 89-- BETA-MINUS DECAY
*IODINE 137-- BETA-MINUS DECAY
*IODINE 138-- BETA-MINUS DECAY
*KRYPTON 93-- BETA-MINUS DECAY
*NITROGEN 17-- BETA-MINUS DECAY
*RUBIDIUM 93-- BETA-MINUS DECAY
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
DELAYED NEUTRONS
ENERGY SPECTRA
HALF-LIFE
N68621* --Physics (Nuclear
Experimental)--Nuclear Properties & Reactions
59 <= A <= 89--Radioactive Decay
N68721 --Physics (Nuclear
Experimental)--Nuclear Properties & Reactions
90 <= A <= 149--Radioactive Decay
*BROMINE 89-- BETA-MINUS DECAY
*IODINE 137-- BETA-MINUS DECAY
*IODINE 138-- BETA-MINUS DECAY
*KRYPTON 93-- BETA-MINUS DECAY
*NITROGEN 17-- BETA-MINUS DECAY
*RUBIDIUM 93-- BETA-MINUS DECAY
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
DELAYED NEUTRONS
ENERGY SPECTRA
HALF-LIFE
N68621* --Physics (Nuclear
Experimental)--Nuclear Properties & Reactions
59 <= A <= 89--Radioactive Decay
N68721 --Physics (Nuclear
Experimental)--Nuclear Properties & Reactions
90 <= A <= 149--Radioactive Decay