High-<i>K</i>structures 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>
Аннотация
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.
Перевод пока недоступен