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Title: ALPHA-EMITTERS WITH SHORT HALF-LIFE INDUCED BY PROTONS ON HEAVY ELEMENTS

Abstract

Alpha-emitters with shod lifetimes have been produced by pulsed bombardment in a synchrocyclotron. The energies were measured with the help of the magnetic field of the cyclotron. and the decay times with an electronic time analyzer. New data for alpha -emitters in the region between uranium and bismuth are given. The results from bombardment of thorium agree with previ-ous information about the Th/sup 224/ and Th/sup 223/ series, and yield half lives for Th/sup 224/ and Th/sup 223/ of respectively 1.05 plus or minus 0.05 sec and 0.9 plus or minus 0.1 sec. Information about further a peaks in the 1 sec region is obtained and the possibility that these are due to the Pa/sup 224/ and Pa/sup 225/ decay series is discussed. The main result from irradiations of Ra is a check of previous data. yielding nuclei with half lives in the range O.5 to 40 sec. No a emitters with lifetimes in the second region were obtained from uranium, lead, thallium, gold. and platinum targets. Bombardments of bismuth yield four new alpha emitters which from alpha systematics are assigned to Po isotopes Po/sup 195-192/. (auth)

Authors:
Publication Date:
Research Org.:
Gustaf Werner Inst. for Nuclear Chemistry, Uppsala
OSTI Identifier:
4300480
NSA Number:
NSA-12-012536
Resource Type:
Journal Article
Journal Name:
Arkiv Fysik
Additional Journal Information:
Journal Volume: Vol: 13; Other Information: Orig. Receipt Date: 31-DEC-58
Country of Publication:
Country unknown/Code not available
Language:
English
Subject:
PHYSICS; ALPHA PARTICLES; BEAMS; CYCLOTRONS; DECAY; ELECTROMAGNETIC FIELDS; ELECTRONICS; ENERGY; GOLD; HALF-LIFE; IRRADIATION; LEAD; MEASURED VALUES; PLATINUM; POLONIUM 192; POLONIUM 193; POLONIUM 194; POLONIUM 195; PRODUCTION; PROTACTINIUM 224; PROTACTINIUM 225; RADIUM; SYNCHROCYCLOTRONS; SYNCHROTRONS; TARGETS; THALLIUM; THORIUM 223; THORIUM 224; URANIUM

Citation Formats

Tove, P A. ALPHA-EMITTERS WITH SHORT HALF-LIFE INDUCED BY PROTONS ON HEAVY ELEMENTS. Country unknown/Code not available: N. p., 1958. Web.
Tove, P A. ALPHA-EMITTERS WITH SHORT HALF-LIFE INDUCED BY PROTONS ON HEAVY ELEMENTS. Country unknown/Code not available.
Tove, P A. Wed . "ALPHA-EMITTERS WITH SHORT HALF-LIFE INDUCED BY PROTONS ON HEAVY ELEMENTS". Country unknown/Code not available.
@article{osti_4300480,
title = {ALPHA-EMITTERS WITH SHORT HALF-LIFE INDUCED BY PROTONS ON HEAVY ELEMENTS},
author = {Tove, P A},
abstractNote = {Alpha-emitters with shod lifetimes have been produced by pulsed bombardment in a synchrocyclotron. The energies were measured with the help of the magnetic field of the cyclotron. and the decay times with an electronic time analyzer. New data for alpha -emitters in the region between uranium and bismuth are given. The results from bombardment of thorium agree with previ-ous information about the Th/sup 224/ and Th/sup 223/ series, and yield half lives for Th/sup 224/ and Th/sup 223/ of respectively 1.05 plus or minus 0.05 sec and 0.9 plus or minus 0.1 sec. Information about further a peaks in the 1 sec region is obtained and the possibility that these are due to the Pa/sup 224/ and Pa/sup 225/ decay series is discussed. The main result from irradiations of Ra is a check of previous data. yielding nuclei with half lives in the range O.5 to 40 sec. No a emitters with lifetimes in the second region were obtained from uranium, lead, thallium, gold. and platinum targets. Bombardments of bismuth yield four new alpha emitters which from alpha systematics are assigned to Po isotopes Po/sup 195-192/. (auth)},
doi = {},
journal = {Arkiv Fysik},
number = ,
volume = Vol: 13,
place = {Country unknown/Code not available},
year = {1958},
month = {1}
}