Absolute E3 and M2 transition probabilities for the electromagnetic decay of the isomeric state in 132Ce

J. Perkowski; J. Andrzejewski; J. Srebrny; A. M. Bruce; Ch. Droste; E. Grodner; M. Kisieliński; A. Korman; M. Kowalczyk; J. Kownacki; A. Król; J. Marganiec; J. Mierzejewski; T. Morek; K. Sobczak; W. H. Trzaska; M. Zielińska

doi:10.1140/epja/i2009-10820-8

EPJ

Absolute E3 and M2 transition probabilities for the electromagnetic decay of the $\mathrm{\ensuremath I^{\pi}=K^{\pi}=8^{-}}$ isomeric state in ¹³²Ce

J. Perkowski¹^*, J. Andrzejewski¹, J. Srebrny², A. M. Bruce⁷, Ch. Droste³, E. Grodner³, M. Kisieliński²^,4, A. Korman⁴, M. Kowalczyk²^,3, J. Kownacki², A. Król¹, J. Marganiec¹^,9, J. Mierzejewski²^,3, T. Morek³, K. Sobczak¹^,8, W. H. Trzaska⁵^,6 and M. Zielińska²

¹ Faculty of Physics and Applied Informatics, University of Lodz, Pomorska 149/153, 90-236, Lodz, Poland
² Heavy Ion Laboratory, University of Warsaw, Pasteura 5A, 02-093, Warsaw, Poland
³ Nuclear Physics Division, IEP, University of Warsaw, Hoża 69, 00-681, Warsaw, Poland
⁴ The Andrzej Soltan Institute for Nuclear Studies, Hoża 69, 00-681, Warsaw, Poland
⁵ Department of Physics, University of Jyväskylä, Survontie 9, P.O. Box 35, FIN-40014, Jyväskylä, Finland
⁶ Helsinki Institute of Physics, Survontie 9, P.O. Box 35, FIN-40014, Helsinki, Finland
⁷ School of Environment and Technology, University of Brighton, Lewes road Brighton, BN2 4GJ, Brighton, UK
⁸ Institute of Physics Polish Academy of Sciences, Al. Lotników 32/46, 02-668, Warsaw, Poland
⁹ Reactions and Nuclear Astrophysics Division, Gesellschaft für Schwerionenforschung (GSI), Planckstrasse 1, D-64291, Darmstadt, Germany

Received: 30 December 2008
Revised: 17 April 2009
Accepted: 9 May 2009
Published online: 9 June 2009

Abstract

The decay of the $\ensuremath I^{\pi}=K^{\pi}=8^{-}$ isomeric state at 2340keV in ¹³²Ce has been investigated in the ¹²⁰Sn(¹⁶O, 4n)¹³²Ce reaction. The measurements were carried out in e - $\gamma$ and $\gamma$ - $\gamma$ coincidence modes using an electron spectrometer coupled to the OSIRIS II gamma-ray array at the Heavy Ion Laboratory of the University of Warsaw. Experimentally obtained internal conversion coefficients for the $\ensuremath 8^{-} \rightarrow 6^{+}$ and $\ensuremath 8^{-} \rightarrow 5^{+}$ transitions allowed the multipolarities, mixing ratios, reduced transition probabilities and hindrance factors to be determined.

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EPJ

Absolute E3 and M2 transition probabilities for the electromagnetic decay of the isomeric state in 132Ce

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Absolute E3 and M2 transition probabilities for the electromagnetic decay of the $\mathrm{\ensuremath I^{\pi}=K^{\pi}=8^{-}}$ isomeric state in ¹³²Ce