Delayed neutron emission from mass-separated fission products

Thesis/Dissertation · Fri Feb 01 00:00:00 EDT 1974

DOI:https://doi.org/10.2172/4345590· OSTI ID:4345590

Norman, Jay Harold ^[1]

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1. 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
• Resource Relation: Other Information: Thesis. Orig. Receipt Date: 30-JUN-74
• Country of Publication: United States
• Language: English

Related Subjects

N68621* -Physics (Nuclear
Experimental)-Nuclear Properties & Reactions
59 <= A <= 89-Radioactive Decay
N68721 -Physics (Nuclear
Experimental)-Nuclear Properties & Reactions
90 <= A <= 149-Radioactive Decay
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
*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
DELAYED NEUTRONS
ENERGY SPECTRA
HALF-LIFE