Article

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P. H. ReganDepartment of Nuclear Physics, Research School of Physical Sciences Engineering, Australian National University, Canberra, ACT 0200, AustraliaG. D. DracoulisDepartment of Nuclear Physics, Research School of Physical Sciences Engineering, Australian National University, Canberra, ACT 0200, AustraliaA.P. ByrneDepartment of Nuclear Physics, Research School of Physical Sciences Engineering, Australian National University, Canberra, ACT 0200, AustraliaG. J. LaneDepartment of Nuclear Physics, Research School of Physical Sciences Engineering, Australian National University, Canberra, ACT 0200, AustraliaT. KibédiDepartment of Nuclear Physics, Research School of Physical Sciences Engineering, Australian National University, Canberra, ACT 0200, AustraliaP. M. WalkerDepartment of Nuclear Physics, Research School of Physical Sciences Engineering, Australian National University, Canberra, ACT 0200, AustraliaA. M. BruceDepartment of Nuclear Physics, Research School of Physical Sciences Engineering, Australian National University, Canberra, ACT 0200, Australia

1995lv

ABI

Abstract

High-spin states have been studied in the very neutron deficient N=74 nucleus, $^{136}\mathrm{Sm}$ with the reaction $^{107}\mathrm{Ag}$${(}^{32}$S,p2n${)}^{136}$Sm. Using time-correlated charged-particle--\ensuremath{\gamma}--\ensuremath{\gamma} spectroscopy, a rotational cascade built upon the ${\mathit{t}}_{1/2}$=15 \ensuremath{\mu}s, ${\mathit{K}}^{\mathrm{\ensuremath{\pi}}}$=${8}^{\mathrm{\ensuremath{-}}}$ isomer has been identified. Although equivalent isomers are known in other N=74 isotones, this represents the only case where the associated band has been observed. The in-band decay properties of this structure are consistent with a 7/${2}^{+}$[404]\ensuremath{\bigotimes}9/${2}^{\mathrm{\ensuremath{-}}}$[514] two quasineutron assignment. A second high-K band, probably of a four-quasiparticle nature, is observed to feed into the ${\mathit{K}}^{\mathrm{\ensuremath{\pi}}}$=${8}^{\mathrm{\ensuremath{-}}}$ band.

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Identifiers

DOI: 10.1103/physrevc.51.1745

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