Evidence for Deformed Ground States in Light Kr Isotopes
R. B. PierceyPhysics Department, Vanderbilt University, Nashville, Tennessee 37235J. H. HamiltonPhysics Department, Vanderbilt University, Nashville, Tennessee 37235R. SoundranayagamPhysics Department, Vanderbilt University, Nashville, Tennessee 37235A. V. RamayyaPhysics Department, Vanderbilt University, Nashville, Tennessee 37235C. MaguirePhysics Department, Vanderbilt University, Nashville, Tennessee 37235Xiaojun SunPhysics Department, Vanderbilt University, Nashville, Tennessee 37235Z. ZhaoPhysics Department, Vanderbilt University, Nashville, Tennessee 37235R.L. RobinsonPhysics Department, Vanderbilt University, Nashville, Tennessee 37235H. J. KimPhysics Department, Vanderbilt University, Nashville, Tennessee 37235S. FrauendorfPhysics Department, Vanderbilt University, Nashville, Tennessee 37235J. DöringPhysics Department, Vanderbilt University, Nashville, Tennessee 37235L. FunkePhysics Department, Vanderbilt University, Nashville, Tennessee 37235G. WinterPhysics Department, Vanderbilt University, Nashville, Tennessee 37235J. D. RothPhysics Department, Vanderbilt University, Nashville, Tennessee 37235Lars Nilausen CleemannPhysics Department, Vanderbilt University, Nashville, Tennessee 37235J. EberthPhysics Department, Vanderbilt University, Nashville, Tennessee 37235W. NeumannPhysics Department, Vanderbilt University, Nashville, Tennessee 37235J. C. WellsPhysics Department, Vanderbilt University, Nashville, Tennessee 37235Jui‐Teng LinPhysics Department, Vanderbilt University, Nashville, Tennessee 37235A.C. ResterPhysics Department, Vanderbilt University, Nashville, Tennessee 37235H. K. CarterPhysics Department, Vanderbilt University, Nashville, Tennessee 37235
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Аннотация
The levels in $^{74,76}\mathrm{Kr}$ were studied with in-beam $\ensuremath{\gamma}$-spectroscopy techniques and the ${\ensuremath{\beta}}^{+}$ decay of $^{76}\mathrm{Rb}$. The energies of the ${2}_{1}^{+}$ states in $^{74,76}\mathrm{Kr}$ deviate from smooth behavior compared with the higher spin levels. The yrast cascade $B(E2)$'s are highly collective. The $^{74,76}\mathrm{Kr}$ ground states have unusually large deformation. The origin of this deformation and of shape coexistence in this region is described in terms of the protons driving the deformation.
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