Neutron-Deficient Isotopes of Thallium

I. Bergström, R. D. Hill, and G. de Pasquali
Phys. Rev. 92, 918 – Published 15 November 1953
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Abstract

The activities of the K-capturing isotopes of Tl198202 have been investigated. Using 180° beta-ray spectrographs, more than 150 conversion lines have been observed. A new isomer of 1.9-hr half-life has been found and assigned to mass number 198. There are three gamma rays of 282.4, 260.7 (isomeric), and 48.7 kev associated with this activity. No thallium isomers, other than Tl198m, or mercury isomers, other than the already known Hg199m, were found. The first excited states in Hg200 and Hg202 were found to be 2+ states. The level schemes of Hg198 and Hg200 are complex.

  • Received 11 August 1953

DOI:https://doi.org/10.1103/PhysRev.92.918

©1953 American Physical Society

Authors & Affiliations

I. Bergström*, R. D. Hill, and G. de Pasquali

  • Physics Department, University of Illinois, Urbana, Illinois

  • *On leave of absence from the Nobel Institute of Physics, Stockholm, Sweden. Assistance in part from Svenska Atomkommittén is gratefully acknowledged.

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Issue

Vol. 92, Iss. 4 — November 1953

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