First observation of excited states in the neutron deficient<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>N</mml:mi><mml:mo>=</mml:mo><mml:mn>86</mml:mn><mml:mn/></mml:math>isotones<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow/><mml:mrow><mml:mn>159</mml:mn></mml:mrow></mml:msup></mml:mrow><mml:mi mathvariant="normal">Ta</mml:mi></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow/><mml:mrow><mml:mn>160</mml:mn></mml:mrow></mml:msup></mml:mrow><mml:mi mathvariant="normal">W</mml:mi></mml:math>
Аннотация
The $\ensuremath{\gamma}$ decays of excited states in the neutron deficient nuclei ${}^{159}\mathrm{Ta}$ and ${}^{160}\mathrm{W}$ have been identified for the first time. The nuclei of interest were produced in reactions induced by beams of ${}^{58}\mathrm{Ni}$ ions at energies of 286 MeV, 291 MeV, and 298 MeV bombarding a ${}^{106}\mathrm{Cd}$ target. Prompt $\ensuremath{\gamma}$ rays were recorded using the JUROSPHERE spectrometer and were tagged through the subsequent $\ensuremath{\alpha}$ decays of associated recoil ions measured in a position-sensitive silicon strip detector at the focal plane of the gas-filled separator RITU. Level schemes have been deduced and compared with similar structures observed in neighboring nuclei.
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