<i>γ</i>decay of the superdeformed shape 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">U</mml:mi></mml:mrow><mml:mprescripts/><mml:mrow/><mml:mrow><mml:mn>236</mml:mn></mml:mrow><mml:mrow/><mml:mrow/></mml:mmultiscripts></mml:mrow></mml:math>

Using the Heidelberg-Darmstadt Crystal Ball spectrometer the \ensuremath{\gamma} decay of the superdeformed shape isomer in $^{236}\mathrm{U}$ has been investigated employing the $^{235}$U(d,p) reaction at 11 MeV. The isomer was isolated by requiring that the prompt and delayed \ensuremath{\gamma} sum energy add up to the initial excitation energy of $^{236}\mathrm{U}$ as determined from the energy of the recoiling proton. The shape isomer was found to have an excitation energy of E${(0}_{\mathrm{II}{}^{+})=2.75\ifmmode\pm\else\textpm\fi{}0.01}$ MeV and to decay by four different \ensuremath{\gamma} transitions in competition with its well known fission mode. The corresponding branching ratio of \ensuremath{\gamma} decay to fission was determined to be ${\ensuremath{\Gamma}}_{F\ensuremath{\gamma}}$/${\ensuremath{\Gamma}}_{\mathrm{Ff}}$=8\ifmmode\pm\else\textpm\fi{}3, thus resolving the long-standing problem of the missing \ensuremath{\gamma} decay branch.

Перевод пока недоступен