Radiations from <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow><mi mathvariant="normal">Ge</mi></mrow><mrow><mn>77</mn></mrow></msup></mrow></math></span> and <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow><mi mathvariant="normal">Ge</mi></mrow><mrow><mn>71</mn></mrow></msup></mrow></math></span>

C. E. Mandeville; Y. H. Woo; M. V. Scherb; W. B. Keighton; E. Shapiro

doi:10.1103/PhysRev.75.1528

Radiations from ${Ge}^{77}$ and ${Ge}^{71}$

C. E. Mandeville, Y. H. Woo, M. V. Scherb, W. B. Keighton, and E. Shapiro

Phys. Rev. 75, 1528 – Published 15 May 1949

Abstract

The 12-hour ${Ge}^{77}$ was found to emit beta-rays of energy 1.74 Mev and $γ$ -rays of 0.5 Mev. Beta-gamma-coincidences were measured in the 12-hour period. The 40-hour positron emitter is not formed by slow neutrons on germanium. The 11-day ${Ge}^{71}$ decays with the emission of the x-rays of gallium following orbital electron capture. Previously obtained absorption curves have given evidence of emission of charged particles by the 11-day period. This misinterpretation is discussed.

See note added in proof.

Received 10 February 1949

DOI:https://doi.org/10.1103/PhysRev.75.1528

Authors & Affiliations

C. E. Mandeville, Y. H. Woo^*, M. V. Scherb^†, W. B. Keighton^‡, and E. Shapiro

Bartol Research Foundation of the Franklin Institute, Swarthmore, Pennsylvania

^*Guest physicist, Bartol Research Foundation, on leave of absence from National Central University and Academia Sinica, Nanking, China.
^†Now at Princeton University, Princeton, New Jersey.
^‡Also of the Department of Chemistry, Swarthmore College, Swarthmore, Pennsylvania.

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Vol. 75, Iss. 10 — May 1949

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