Background: Type II shell evolution has recently been identified as a microscopic cause for nuclear shape coexistence.
Purpose: Establish a low-lying rotational band in ^{96}Zr.
Methods: High-resolution inelastic electron scattering and a relative analysis of transition strengths are used.
Results: The B(E2;0_{1}^{+}→2_{2}^{+}) value is measured and electromagnetic decay strengths of the 2_{2}^{+} state are deduced.
Conclusions: Shape coexistence is established for ^{96}Zr. Type II shell evolution provides a systematic and quantitative mechanism to understand deformation at low excitation energies.
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| http://dx.doi.org/10.1103/PhysRevLett.117.172503 | DOI Listing |
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