Alpha-decay of neutron-deficient ²⁰⁰Fr and heavier neighbours

H. De Witte,A. N. Andreyev,S. Dean,S. Franchoo,M. Huyse,O N Ivanov,U. Köster,W. Kurcewicz,J. Kurpeta,A. Plochocki,K. Van de Vel,J. Van de Walle,Piet Van Duppen

EUROPEAN PHYSICAL JOURNAL A（2005）

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摘要

A new measurement of the Fr-200 alpha-decay half-life, with improved accuracy compared to previous measurements, has been carried out at the Isolde-CERN on-line mass separator. A half-life of 49(4) ms has been obtained, which is substantially different from earlier literature values. For the At-196 daughter decay, a half-life of 389(54) ms and an alpha branching ratio b(alpha) = 94(5)% were measured. In addition, the half-lives of Fr-201,Fr-203,Fr-205 and At-197,At-199 are reported.

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Alpha-decay of neutron-deficient 200Fr and heavier neighbours

Alpha-decay of neutron-deficient ²⁰⁰Fr and heavier neighbours