Neutron-Deficient Cesium Isotopes

Richard W. Fink; Frederick L. Reynolds; D. H. Templeton

doi:10.1103/PhysRev.77.614

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Neutron-Deficient Cesium Isotopes

Richard W. Fink, Frederick L. Reynolds, and D. H. Templeton

Department of Chemistry and Chemical Engineering and Radiation Laboratory, University of California, Berkeley, California

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Phys. Rev. 77, 614 – Published 1 March, 1950

DOI: https://doi.org/10.1103/PhysRev.77.614

Abstract

The new isotopes ${Cs}^{127}$ and ${Cs}^{129}$ have been produced from iodine by irradiation with high energy helium ions. Their mass assignments were determined with a mass spectrograph. ${Cs}^{127}$ decays with 5.5±0.5 hr. half-life with emission of positrons (1.2 Mev maximum energy), giving rise to the daughter activity 34-day ${Xe}^{127}$ . ${Cs}^{129}$ decays by electron capture with half-life 31±1 hr. A 30-min. activity, presumed to be ${Cs}^{130}$ , was also produced, but its mass assignment is uncertain.

References (5)

Reynolds, Karraker, and Templeton, Phys. Rev. 75, 313 (1949)
G. T. Seaborg and I. Perlman, "Table of isotopes," Rev. Mod. Phys. 20, 585 (1948) Yaffe, Kirsch, Standil, and Grunlund, Phys. Rev. 75, 699 (1949) N. Sugarman, 75, 1473 (1949) J. L. Meem and F. Maienschein, 76, 328 (1949) J. S. Osoba, 76, 345 (1949) Karraker, Reynolds, and Templeton, UCRL Report-285 (February 11, 1949) (to be published)
"J. R. Risser and R. N. Smith, private communication from K. Lark-Horowitz," G. T. Seaborg and I. Perlman, [2]
R. W. Fink, M.S. thesis, University of California, Berkeley, 1949
Creutz, Delsasso, Sutton, White, and Barkas, Phys. Rev. 58, 481 (1940) M. Camac, Plutonium Project Report CC-2409 (October, 1944) Overstreet, Jacobson, Scott, and Hamilton, Plutonium Project Report CH-379 (December 1942)

[c1] Reynolds, Karraker, and Templeton, Phys. Rev. 75, 313 (1949)

[c2] G. T. Seaborg and I. Perlman, "Table of isotopes," Rev. Mod. Phys. 20, 585 (1948) Yaffe, Kirsch, Standil, and Grunlund, Phys. Rev. 75, 699 (1949) N. Sugarman, 75, 1473 (1949) J. L. Meem and F. Maienschein, 76, 328 (1949) J. S. Osoba, 76, 345 (1949) Karraker, Reynolds, and Templeton, UCRL Report-285 (February 11, 1949) (to be published)

[c3] "J. R. Risser and R. N. Smith, private communication from K. Lark-Horowitz," G. T. Seaborg and I. Perlman, [2]

[c4] R. W. Fink, M.S. thesis, University of California, Berkeley, 1949

[c5] Creutz, Delsasso, Sutton, White, and Barkas, Phys. Rev. 58, 481 (1940) M. Camac, Plutonium Project Report CC-2409 (October, 1944) Overstreet, Jacobson, Scott, and Hamilton, Plutonium Project Report CH-379 (December 1942)

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Neutron-Deficient Cesium Isotopes

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