Levels in K45 and K46 excited by the β decay of Ar45 and Ar46

A. Huck, G. Klotz, A. Knipper, C. Miehé, G. Walter, and C. Richard-Serre
Phys. Rev. C 21, 712 – Published 1 February 1980
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Abstract

The nuclides Ar45 and Ar46 have been produced by spallation reactions on vanadium targets at Ep=600 MeV. The subsequent β decays to K45 and K46 states have been studied. An intensity of 98.6 ± 0.6% was measured for the β transition to the 1.94 MeV state in K46. A decay scheme involving 13 β branches has been established for Ar45, and the corresponding logft values have been deduced. Eleven states are reported for the first time in the β decay scheme of Ar45 at 1.42, 1.47, 1.72, 2.52, 2.57, 2.75, 3.31, 3.99, 4.04, 4.36, and 4.57 MeV. From the lifetime, τ=4.6±0.6 ns, deduced from γγ delayed coincidences, the angular momentum of the 1081 keV level has been established as 7/2 on the basis of the transition strength of its γ decay. A survey on the 1f721d32 M2 transition in odd K nuclei is presented and the observed hindrance factors are discussed.

RADIOACTIVITY Ar45,46 [from V50,51(p,6pxn)—natural target, mass separated] measured delayed Eγ, Iγ, prompt and delayed γγ coin., deduced decay schemes, logft, J, π T12.

  • Received 24 July 1979

DOI:https://doi.org/10.1103/PhysRevC.21.712

©1980 American Physical Society

Authors & Affiliations

A. Huck, G. Klotz, A. Knipper, C. Miehé, and G. Walter

  • Centre de Recherches Nucléaires, 67037 Strasbourg Cedex, France Isolde Collaboration, CERN, 1211 Geneva 23, Switzerland

C. Richard-Serre

  • Isolde Collaboration, CERN, 1211 Geneva 23, Switzerland

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Issue

Vol. 21, Iss. 2 — February 1980

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