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Binary and ternary photofission of thorium 232

Journal Article:

Abstract

Work by Titterton and Goward (1949) has shown that uranium undergoes photofission into three charged fragments. Experiments have been conducted to determine whether a similar process takes place in the photofission of thorium. Some difficulties were encountered in loading plates with /sup 232/Th atoms, but this was finally accomplished by means of a technique described in detail. Plates loaded by this method were irradiated with a continuous spectrum of ..gamma.. rays of maximum energy 24 MeV from the (Atomic Energy Research Establishment) Synchrotron. Three irradiations, of 100, 150, and 180 r, were made and the resulting plates showed a fission density of 2.5 x 10/sup 4//cc at the 150 r level. In an examination involving 2500 binary photofissions, 5 cases of ternary fission involving the emission of a long range light fragment, probably an ..cap alpha..-particle, were observed. These events are described. A number-range curve was determined for the photofission tracks and is compared with a similar curve for tracks formed by the slow neutron fission of /sup 235/U in a D/sub 1/ emulsion under conditions of similar emulsion sensitivity. It appears that the energy release in the photofission of /sup 232/Th is smaller than that in the slow neutron  More>>
Publication Date:
May 01, 1950
Product Type:
Journal Article
Reference Number:
EDB-79-134562
Resource Relation:
Journal Name: Philos. Mag.; (United Kingdom); Journal Volume: 41; Other Information: In NSA; 4: 4368(1950)
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; THORIUM 232 TARGET; PHOTOFISSION; BINARY FISSION; BREMSSTRAHLUNG; KINETIC ENERGY; MEV RANGE 10-100; TERNARY FISSION; ELECTROMAGNETIC RADIATION; ENERGY; ENERGY RANGE; FISSION; MEV RANGE; NUCLEAR REACTIONS; PHOTONUCLEAR REACTIONS; RADIATIONS; TARGETS; 652026* - Nuclear Properties & Reactions, A=220 & above, Experimental- Spontaneous & Induced Fission- (-1987)
OSTI ID:
5812191
Country of Origin:
United Kingdom
Language:
English
Other Identifying Numbers:
Journal ID: CODEN: PHMAA
Submitting Site:
TIC
Size:
Pages: 500-503
Announcement Date:

Journal Article:

Citation Formats

Titterton, E W, and Brinkley, T A. Binary and ternary photofission of thorium 232. United Kingdom: N. p., 1950. Web.
Titterton, E W, & Brinkley, T A. Binary and ternary photofission of thorium 232. United Kingdom.
Titterton, E W, and Brinkley, T A. 1950. "Binary and ternary photofission of thorium 232." United Kingdom.
@misc{etde_5812191,
title = {Binary and ternary photofission of thorium 232}
author = {Titterton, E W, and Brinkley, T A}
abstractNote = {Work by Titterton and Goward (1949) has shown that uranium undergoes photofission into three charged fragments. Experiments have been conducted to determine whether a similar process takes place in the photofission of thorium. Some difficulties were encountered in loading plates with /sup 232/Th atoms, but this was finally accomplished by means of a technique described in detail. Plates loaded by this method were irradiated with a continuous spectrum of ..gamma.. rays of maximum energy 24 MeV from the (Atomic Energy Research Establishment) Synchrotron. Three irradiations, of 100, 150, and 180 r, were made and the resulting plates showed a fission density of 2.5 x 10/sup 4//cc at the 150 r level. In an examination involving 2500 binary photofissions, 5 cases of ternary fission involving the emission of a long range light fragment, probably an ..cap alpha..-particle, were observed. These events are described. A number-range curve was determined for the photofission tracks and is compared with a similar curve for tracks formed by the slow neutron fission of /sup 235/U in a D/sub 1/ emulsion under conditions of similar emulsion sensitivity. It appears that the energy release in the photofission of /sup 232/Th is smaller than that in the slow neutron fission of /sup 235/U. The data indicate that 124 MeV is the mean kinetic energy released in the photofission of /sup 232/Th.}
journal = {Philos. Mag.; (United Kingdom)}
volume = {41}
journal type = {AC}
place = {United Kingdom}
year = {1950}
month = {May}
}