The isospin mixing was deduced in the compound nucleus Zr80 at an excitation energy of E∗=54 MeV from the γ decay of the giant dipole resonance. The reaction Ca40+Ca40 at Ebeam=136 MeV was used to form the compound nucleus in the isospin I=0 channel, while the reaction Cl37+Ca44 at Ebeam=95 MeV 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.

Isospin Mixing in 80Zr : from Finite to Zero Temperature / S. Ceruti, F. Camera, A. Bracco, R. Avigo, G. Benzoni, N. Blasi, G. Bocchi, S. Bottoni, S. Brambilla, F.C.L. Crespi, A. Giaz, S. Leoni, A. Mentana, B. Million, A.I. Morales, R. Nicolini, L. Pellegri, A. Pullia, S. Riboldi, O. Wieland, B. Birkenbach, D. Bazzacco, M. Ciemala, P. Désesquelles, J. Eberth, E. Farnea, A. Görgen, A. Gottardo, H. Hess, D.S. Judson, A. Jungclaus, M. Kmiecik, W. Korten, A. Maj, R. Menegazzo, D. Mengoni, C. Michelagnoli, V. Modamio, D. Montanari, S. Myalski, D. Napoli, B. Quintana, P. Reiter, F. Recchia, D. Rosso, E. Sahin, M.D. Salsac, P.-. Söderström, O. Stezowski, C. Theisen, C. Ur, J.J. Valiente-Dobón, M. Zieblinski. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 115:22(2015 Nov 27), pp. 222502.1-222502.5.

Isospin Mixing in 80Zr : from Finite to Zero Temperature

S. Ceruti
Primo
;
F. Camera
Secondo
;
A. Bracco;R. Avigo;G. Benzoni;G. Bocchi;S. Bottoni;F.C.L. Crespi;A. Giaz;S. Leoni;A. Mentana;R. Nicolini;L. Pellegri;A. Pullia;S. Riboldi;D. Montanari;
2015-11-27

Abstract

The isospin mixing was deduced in the compound nucleus Zr80 at an excitation energy of E∗=54 MeV from the γ decay of the giant dipole resonance. The reaction Ca40+Ca40 at Ebeam=136 MeV was used to form the compound nucleus in the isospin I=0 channel, while the reaction Cl37+Ca44 at Ebeam=95 MeV 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.
Physics and Astronomy (all)
Settore FIS/01 - Fisica Sperimentale
Settore FIS/04 - Fisica Nucleare e Subnucleare
Article (author)
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/461944
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