ALPHA-EMITTERS WITH SHORT HALF-LIFE INDUCED BY PROTONS ON HEAVY ELEMENTS
Journal Article
·
· Arkiv Fysik
OSTI ID:4300480
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)
- Research Organization:
- Gustaf Werner Inst. for Nuclear Chemistry, Uppsala
- NSA Number:
- NSA-12-012536
- OSTI ID:
- 4300480
- Journal Information:
- Arkiv Fysik, Journal Name: Arkiv Fysik Vol. Vol: 13
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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Related Subjects
ALPHA PARTICLES
BEAMS
CYCLOTRONS
DECAY
ELECTROMAGNETIC FIELDS
ELECTRONICS
ENERGY
GOLD
HALF-LIFE
IRRADIATION
LEAD
MEASURED VALUES
PHYSICS
PLATINUM
POLONIUM 192
POLONIUM 193
POLONIUM 194
POLONIUM 195
PRODUCTION
PROTACTINIUM 224
PROTACTINIUM 225
RADIUM
SYNCHROCYCLOTRONS
SYNCHROTRONS
TARGETS
THALLIUM
THORIUM 223
THORIUM 224
URANIUM
BEAMS
CYCLOTRONS
DECAY
ELECTROMAGNETIC FIELDS
ELECTRONICS
ENERGY
GOLD
HALF-LIFE
IRRADIATION
LEAD
MEASURED VALUES
PHYSICS
PLATINUM
POLONIUM 192
POLONIUM 193
POLONIUM 194
POLONIUM 195
PRODUCTION
PROTACTINIUM 224
PROTACTINIUM 225
RADIUM
SYNCHROCYCLOTRONS
SYNCHROTRONS
TARGETS
THALLIUM
THORIUM 223
THORIUM 224
URANIUM