New neutron deficient isotopes of krypton

doi:10.1016/0022-1902(60)80079-6

Journal of Inorganic and Nuclear Chemistry

Volume 16, Issues 1–2, November 1960, Pages 10-15

https://doi.org/10.1016/0022-1902(60)80079-6 Get rights and content

Abstract

Two new activities have been found in the neutron deficient isotopes of krypton produced by [p, xn] reactions on bromine. The half-lives have been determined as 12·0 ± 1·0 min and 5·5 ± 0·4 min. These activities are assigned to ⁷⁴Kr and ⁷⁵Kr respectively on the basis of their genetic relationships with bromine isotopes.

The isotope ⁷⁴Br has been observed to emit a positron with a maximum energy of 4·7 MeV and the half-life of this isotope is 25·7 ± 0·9 min.

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Citation Excerpt :
The three most recent values were 73.5 (11) min (Houdayer, 1974), 75 (3) min (Baskova, 1973), and 74.7 (7) min (Borchert, 1971), respectively. However, another value of 71.1 (5) min reported by Butement (1960) was more precise, but not included in the evaluators’ averaging procedure, owing to the obvious difference by comparison with the values clustered around 74 min. The large discrepancy (∼4%) between the evaluated value 74.4 (6) and the precise value 71.1 (5) min aroused our interest in investigating the 77Kr half-life.
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^∗: Present address: College of Technology, Liverpool, 3.

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New neutron deficient isotopes of krypton

Abstract

Nucl. Phys.

Physica

Phys. Rev.

Phys. Rev.