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Distribution of nuclear charge in the proton-induced fission of Th-232

Technical Report:

Abstract

A great deal of work has been done on the distribution of nuclear mass in the fission process. About the nuclear charge distribution less is known. Data exist on the distribution from the fission of U-235 with thermal neutrons and with 14 Mev neutrons. Data also exist for the fission of uranium by 170 Mev protons, of bismuth by 190 Mev deuterons, and of uranium, thorium and bismuth by 480 Mev protons, and there is fragmentary information from other systems. The present work was undertaken to investigate the changes that occur in the charge distribution from proton-induced fission of Th-232 as the bombarding energy is raised from 8 to 90 Mev, the maximum proton energy of the McGill synchrocyclotron. This energy range is of interest in view of the substantial changes observed in the mass distribution. Also in this interval a change presumably begins in the nature of the initial step in nuclear reactions, from simple compound-nucleus formation, to a mechanism of direct interaction with individual nucleons. Thus at the lower energies studied, excitation of the nuclei at the end of the first step of the reaction will be essentially monochromatic whereas at the higher end of the bombarding-energy range,  More>>
Authors:
Pate, B D; [1]  Foster, J S; Yaffe, L [2] 
  1. Brookhaven National Laboratory, Upton, New York (United States)
  2. McGill Univ., Montreal, Quebec (Canada)
Publication Date:
Sep 15, 1958
Product Type:
Technical Report
Report Number:
AECL-607
Resource Relation:
Other Information: 24 refs., 1 tab., 8 figs
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ATOMIC NUMBER; BISMUTH; EXCITATION; FISSION; NUCLEAR REACTION ANALYSIS; PROTON BEAMS; THORIUM 232; URANIUM 235
OSTI ID:
21260727
Research Organizations:
Atomic Energy of Canada Limited, Chalk River, Ontario (Canada)
Country of Origin:
Canada
Language:
English
Other Identifying Numbers:
TRN: CA1000189011562
Availability:
Available from Atomic Energy of Canada Limited, Chalk River, Ontario (Canada) under report number. Also paper A/CONF.15/P197 presented at the Second International Conference on the Peaceful Uses of Atomic Energy, Geneva, Switzerland, 1-13 Sep 1958
Submitting Site:
CANN
Size:
20 pages
Announcement Date:
Mar 04, 2010

Technical Report:

Citation Formats

Pate, B D, Foster, J S, and Yaffe, L. Distribution of nuclear charge in the proton-induced fission of Th-232. Canada: N. p., 1958. Web.
Pate, B D, Foster, J S, & Yaffe, L. Distribution of nuclear charge in the proton-induced fission of Th-232. Canada.
Pate, B D, Foster, J S, and Yaffe, L. 1958. "Distribution of nuclear charge in the proton-induced fission of Th-232." Canada.
@misc{etde_21260727,
title = {Distribution of nuclear charge in the proton-induced fission of Th-232}
author = {Pate, B D, Foster, J S, and Yaffe, L}
abstractNote = {A great deal of work has been done on the distribution of nuclear mass in the fission process. About the nuclear charge distribution less is known. Data exist on the distribution from the fission of U-235 with thermal neutrons and with 14 Mev neutrons. Data also exist for the fission of uranium by 170 Mev protons, of bismuth by 190 Mev deuterons, and of uranium, thorium and bismuth by 480 Mev protons, and there is fragmentary information from other systems. The present work was undertaken to investigate the changes that occur in the charge distribution from proton-induced fission of Th-232 as the bombarding energy is raised from 8 to 90 Mev, the maximum proton energy of the McGill synchrocyclotron. This energy range is of interest in view of the substantial changes observed in the mass distribution. Also in this interval a change presumably begins in the nature of the initial step in nuclear reactions, from simple compound-nucleus formation, to a mechanism of direct interaction with individual nucleons. Thus at the lower energies studied, excitation of the nuclei at the end of the first step of the reaction will be essentially monochromatic whereas at the higher end of the bombarding-energy range, a broad spectrum of excitation energies will be produced, with corresponding complexity of the reaction products observed. (author)}
place = {Canada}
year = {1958}
month = {Sep}
}