Isospin Mixing in Zr80: From Finite to Zero Temperature

S. Ceruti et al.
Phys. Rev. Lett. 115, 222502 – Published 25 November 2015

Abstract

The isospin mixing was deduced in the compound nucleus Zr80 at an excitation energy of E*=54MeV from the γ decay of the giant dipole resonance. The reaction Ca40+Ca40 at Ebeam=136MeV was used to form the compound nucleus in the isospin I=0 channel, while the reaction Cl37+Ca44 at Ebeam=95MeV was used as the reference reaction. The γ rays were detected with the AGATA demonstrator array coupled with LaBr3:Ce detectors. The temperature dependence of the isospin mixing was obtained and the zero-temperature value deduced. The isospin-symmetry-breaking correction δC used for the Fermi superallowed transitions was extracted and found to be consistent with β-decay data.

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  • Received 26 March 2015

DOI:https://doi.org/10.1103/PhysRevLett.115.222502

© 2015 American Physical Society

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Vol. 115, Iss. 22 — 27 November 2015

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