Isotopes of Berkelium and Californium Produced by Neutron Irradiation of Plutonium

Isotopes of Berkelium and Californium Produced by Neutron Irradiation of Plutonium

Samples of Bk and Cf have been separated from neutronirradiated Pu and carefully purified. Pure Cf/sup 249/ daughter has been separated from the Bk/sup 249/. The Cf sample and its Cm decay products have been mass analyzed. The Bk fraction contained 314 plus or minus 8 day Bk/sup 249/ emitting 0.114...

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Veröffentlicht in:Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, 1957-01, Vol.107 (6), p.1635-1638
Hauptverfasser: Eastwood, T. A., Butler, J. P., Cabell, M. J., Jackson, H. G., Schuman, R. P., Rourke, F. M., Collins, T. L.
Format: Artikel
Sprache:eng
Schlagworte:
ALPHA DECAY
ALPHA PARTICLES
BERKELIUM
BERKELIUM 249
BERKELIUM ISOTOPES
BETA DECAY
BETA PARTICLES
CALIFORNIUM
CALIFORNIUM 249
CALIFORNIUM 250
CALIFORNIUM 251
CALIFORNIUM 252
CALIFORNIUM 253
CALIFORNIUM ISOTOPES
CLEANING
CURIUM
DECAY
EFFICIENCY
ENERGY
HALF-LIFE
IRRADIATION
ISOTOPES
MASS
MEASURED VALUES
NEUTRON BEAMS
NEUTRONS
PHYSICS
PLUTONIUM
PRODUCTION
SEPARATION PROCESSES
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Zusammenfassung:Samples of Bk and Cf have been separated from neutronirradiated Pu and carefully purified. Pure Cf/sup 249/ daughter has been separated from the Bk/sup 249/. The Cf sample and its Cm decay products have been mass analyzed. The Bk fraction contained 314 plus or minus 8 day Bk/sup 249/ emitting 0.114 plus or minus 0.115 Mev beta particles and 5.417 plus or minus 0.015 Mev and 5.03 plus or minus 0.03 Mev alpha particles. The alpha - beta ratio was found to be (2.2 plus or minus 0. 10/sup -5/. The Cf sample contained: 360 plus or minus 40 year Cf/sup 249/ emitting 5.808 plus or minus 0.010, 5.93 plus or minus 0.02, and 6.20 plus or minus 0.02 Mev alpha par ticles; 10.9 plus or minus 0.8 year Cf/sup 250/ emitting 6.020 plus or minus 0.010 Mev alpha particles; 800-year Cf/sup 251/; 2.55 plus or minus 0.15 year Cf/sup 252/ emitting 6.112 plus or minus 0.015 Mev alpha particles; and 17 plus or minus 1 day Cf/sup 253/. (auth)
ISSN:0031-899X
DOI:10.1103/PhysRev.107.1635