Decay of the Odd-Odd Isomer <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow><mi mathvariant="normal">Tl</mi></mrow><mrow><mn>1</mn><mn>9</mn><mn>8</mn><mi>m</mi></mrow></msup></mrow></math></span>

T. O. Passell; M. C. Michel; I. Bergström

doi:10.1103/PhysRev.95.999

Decay of the Odd-Odd Isomer ${Tl}^{198 m}$

T. O. Passell, M. C. Michel, and I. Bergström

Phys. Rev. 95, 999 – Published 15 August 1954

Abstract

The electron spectrum of ${Tl}^{198 m}$ has been investigated in a 25-cm double-focusing beta spectrometer with a resolution of approximately 0.4 percent. The electron lines have been assigned to three gamma rays with energies (in kev) 261.5, 284, and 48.4, respectively. The multipolarities assigned from conversion ratio and lifetime considerations are $M 4$ , $M 1 + E 2$ , and $E 2$ , respectively. A tentative decay scheme is proposed which is consistent with all the available data.

Received 4 May 1954

DOI:https://doi.org/10.1103/PhysRev.95.999

Authors & Affiliations

T. O. Passell, M. C. Michel, and I. Bergström^*

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

^*On leave of absence from the Nobel Institute for Physics, Stockholm, Sweden, with a grant from Svenska Atomkommitten.

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Vol. 95, Iss. 4 — August 1954

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