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Prompt Gamma Radiation from Fragments in the Thermal Fission of {sup 235}U

Abstract

Measurements were made on the gamma radiation emitted from fission fragments in slow neutron induced fission of {sup 235}U. The fragments were detected with solid state detectors of the surface barrier type and the gamma radiation with a Nal(Tl) scintillator. Mass selection was used so that the gamma radiation could be measured as a function of fragment mass. Time discrimination between the fission gammas and the prompt neutrons released in the fission process was employed to reduce the background. The gamma radiation emitted during different time intervals after the fission event was studied with the help of a collimator, the position of which was changed along the path of the fission fragments. In this way a decay curve was obtained from which the life-time of one of the gamma-emitting states could be estimated. The relative yield of the gamma-rays was determined as a function of mass for different gamma-ray energy portions and two specific time intervals after the fission events. Comparisons were made with data obtained from {sup 252} Cf-fission. Attention is drawn to some features which seem to be the same in {sup 235}U and {sup 252} Cf-fission.
Authors:
Albinsson, H; [1]  Lindow, L [2] 
  1. Chalmers Univ. of Technology, Goteborg (Sweden)
  2. AB Atomenergi, Nykoeping (Sweden)
Publication Date:
Jun 15, 1970
Product Type:
Technical Report
Report Number:
AE-398
Resource Relation:
Other Information: 42 refs., 10 figs.
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; URANIUM 235; THERMAL FISSION; PROMPT GAMMA RADIATION; FISSION FRAGMENTS; SURFACE BARRIER DETECTORS; NAI DETECTORS
OSTI ID:
20886598
Research Organizations:
AB Atomenergi, Nykoeping (Sweden)
Country of Origin:
Sweden
Language:
English
Other Identifying Numbers:
TRN: SE0708148
Availability:
Commercial reproduction prohibited; OSTI as DE20886598
Submitting Site:
SWDN
Size:
52 pages
Announcement Date:
Jul 13, 2007

Citation Formats

Albinsson, H, and Lindow, L. Prompt Gamma Radiation from Fragments in the Thermal Fission of {sup 235}U. Sweden: N. p., 1970. Web.
Albinsson, H, & Lindow, L. Prompt Gamma Radiation from Fragments in the Thermal Fission of {sup 235}U. Sweden.
Albinsson, H, and Lindow, L. 1970. "Prompt Gamma Radiation from Fragments in the Thermal Fission of {sup 235}U." Sweden.
@misc{etde_20886598,
title = {Prompt Gamma Radiation from Fragments in the Thermal Fission of {sup 235}U}
author = {Albinsson, H, and Lindow, L}
abstractNote = {Measurements were made on the gamma radiation emitted from fission fragments in slow neutron induced fission of {sup 235}U. The fragments were detected with solid state detectors of the surface barrier type and the gamma radiation with a Nal(Tl) scintillator. Mass selection was used so that the gamma radiation could be measured as a function of fragment mass. Time discrimination between the fission gammas and the prompt neutrons released in the fission process was employed to reduce the background. The gamma radiation emitted during different time intervals after the fission event was studied with the help of a collimator, the position of which was changed along the path of the fission fragments. In this way a decay curve was obtained from which the life-time of one of the gamma-emitting states could be estimated. The relative yield of the gamma-rays was determined as a function of mass for different gamma-ray energy portions and two specific time intervals after the fission events. Comparisons were made with data obtained from {sup 252} Cf-fission. Attention is drawn to some features which seem to be the same in {sup 235}U and {sup 252} Cf-fission.}
place = {Sweden}
year = {1970}
month = {Jun}
}