$\ensuremath{\gamma}$-ray and decay spectroscopy of ${}^{194,195,196}$At

$γ$ -ray and decay spectroscopy of $^{194, 195, 196}$ At

M. Nyman, S. Juutinen, I. Darby, S. Eeckhaudt, T. Grahn, P. T. Greenlees, U. Jakobsson, P. Jones, R. Julin, S. Ketelhut, H. Kettunen, M. Leino, P. Nieminen, P. Peura, P. Rahkila, J. Sarén, C. Scholey, J. Sorri, J. Uusitalo, and T. Enqvist

Phys. Rev. C 88, 054320 – Published 25 November 2013

Abstract

Excited states of $^{195}$ At have been studied by means of in-beam $γ$ -ray spectroscopy and the recoil-decay tagging technique. A strongly coupled rotational band feeding the $α$ -decaying $7 / 2^{-}$ state via unobserved transitions was identified. This band is presumably built on the oblate proton $I^{π} = 13 / 2^{+}$ state. Confirming earlier measurements, $α$ decays from the $1 / 2^{+}$ and $7 / 2^{-}$ states were observed. Additionally, an $E 3$ branch competing with the $α$ decay of the $7 / 2^{-}$ state was inferred. Also $α$ decays of the odd-odd isotopes $^{194, 196}$ At were examined.

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Received 5 January 2012

DOI:https://doi.org/10.1103/PhysRevC.88.054320

Authors & Affiliations

M. Nyman^1,*, S. Juutinen¹, I. Darby^1,†, S. Eeckhaudt¹, T. Grahn¹, P. T. Greenlees¹, U. Jakobsson¹, P. Jones^1,‡, R. Julin¹, S. Ketelhut^1,§, H. Kettunen¹, M. Leino¹, P. Nieminen¹, P. Peura¹, P. Rahkila¹, J. Sarén¹, C. Scholey¹, J. Sorri¹, J. Uusitalo¹, and T. Enqvist²

¹Department of Physics, P.O. Box 35 (YFL), FI-40014 University of Jyväskylä, Finland
²CUPP, P.O. Box 22, FI-86801 Pyhäsalmi, Finland

^*Present address: Institute for Reference Materials and Measurements (IRMM), Retieseweg 111, B-2440 Geel, Belgium; markus.e.j.nyman@gmail.com.
^†Present address: Instituut voor Kern- en Stralingsfysica, University of Leuven, Celestijnenlaan 200 D, B-3001 Leuven, Belgium.
^‡Present address: iThemba LABS, National Research Foundation, P.O. Box 722, Somerset West 7129, South Africa.
^§Present address: TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, Canada V6T 2A3.

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Vol. 88, Iss. 5 — November 2013

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Physical Review C

covering nuclear physics

$γ$ -ray and decay spectroscopy of $^{194, 195, 196}$ At

M. Nyman, S. Juutinen, I. Darby, S. Eeckhaudt, T. Grahn, P. T. Greenlees, U. Jakobsson, P. Jones, R. Julin, S. Ketelhut, H. Kettunen, M. Leino, P. Nieminen, P. Peura, P. Rahkila, J. Sarén, C. Scholey, J. Sorri, J. Uusitalo, and T. Enqvist

Phys. Rev. C 88, 054320 – Published 25 November 2013

Abstract

Authors & Affiliations

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Physical Review C

covering nuclear physics

γ-ray and decay spectroscopy of 194,195,196At

M. Nyman, S. Juutinen, I. Darby, S. Eeckhaudt, T. Grahn, P. T. Greenlees, U. Jakobsson, P. Jones, R. Julin, S. Ketelhut, H. Kettunen, M. Leino, P. Nieminen, P. Peura, P. Rahkila, J. Sarén, C. Scholey, J. Sorri, J. Uusitalo, and T. Enqvist

Phys. Rev. C 88, 054320 – Published 25 November 2013

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$γ$ -ray and decay spectroscopy of $^{194, 195, 196}$ At