A<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="italic">K</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant="normal">π</mml:mi></mml:mrow></mml:msup></mml:mrow></mml:math>=<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mn>8</mml:mn></mml:mrow><mml:mrow><mml:mi mathvariant="normal">−</mml:mi></mml:mrow></mml:msup></mml:mrow></mml:math>isomer in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">Sm</mml:mi></mml:mrow><mml:mprescripts/><mml:mrow/><mml:mrow><mml:mn>136</mml:mn></mml:mrow><mml:mrow/><mml:mrow/></mml:mmultiscripts></mml:mrow></mml:math>
A. M. BruceDepartment of Mathematical Sciences, University of Brighton, Brighton BN2 4GJ, United KingdomP. M. WalkerDepartment of Mathematical Sciences, University of Brighton, Brighton BN2 4GJ, United KingdomP. H. ReganDepartment of Mathematical Sciences, University of Brighton, Brighton BN2 4GJ, United KingdomG. D. DracoulisDepartment of Mathematical Sciences, University of Brighton, Brighton BN2 4GJ, United KingdomA.P. ByrneDepartment of Mathematical Sciences, University of Brighton, Brighton BN2 4GJ, United KingdomT. KibédiDepartment of Mathematical Sciences, University of Brighton, Brighton BN2 4GJ, United KingdomG. J. LaneDepartment of Mathematical Sciences, University of Brighton, Brighton BN2 4GJ, United KingdomKa Chun Au YeungDepartment of Mathematical Sciences, University of Brighton, Brighton BN2 4GJ, United Kingdom
1994lv
ABI
Аннотация
An isomer with a half-life of 15\ifmmode\pm\else\textpm\fi{}1 \ensuremath{\mu}s has been observed in the N=74 nucleus $^{136}\mathrm{Sm}$, populated following the reaction $^{107}\mathrm{Ag}$${(}^{32}$S,p2n${)}^{136}$Sm. It is proposed to have a ${\mathit{K}}^{\mathrm{\ensuremath{\pi}}}$=${8}^{\mathrm{\ensuremath{-}}}$ two quasineutron configuration. The isomer decays via a \ensuremath{\Delta}K=8, 466 keV E1 transition with a surprisingly low hindrance per degree of K forbiddenness, ${\mathit{f}}_{\ensuremath{\nu}}$=25.
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