Isospin mixing at finite temperature in Zr-80

Academic Article

Publication Date:

2012

Citation:

Isospin mixing at finite temperature in Zr-80 / A. Corsi, A. Bracco, F. Camera, F.C.L. Crespi, A. Giaz, S. Leoni, D. Montanari, R. Nicolini, V. Vandone, O. Wieland, G. Benzoni, N. Blasi, S. Brambilla, B. Million, V.L. Kraychuk, M. Cinausero, M. Degerlier, F. Gramegna, T. Marchi, S. Barlini, L. Bardelli, M. Bini, G. Casini, A. Nannini, G. Pasquali, G. Poggi, G. Baiocco, M. Bruno, M. D'Agostino, L. Morelli, G. Vannini, M. Ciemala, M. Kmiecik, A. Maj, K. Mazurek, W. Meczynski, S. Myalski. - In: JOURNAL OF PHYSICS. CONFERENCE SERIES. - ISSN 1742-6588. - 381(2012), pp. 012045.1-012045.6. ((Intervento presentato al convegno Rutherford Centennial Conference on Nuclear Physics tenutosi a Manchester nel 2011 [10.1088/1742-6596/381/1/012045].

abstract:

The degree of isospin mixing in the hot compound nucleus Zr-80 has been extracted by statistical-model analysis of the gamma-decay spectrum emitted in fusion reactions Ca-40+Ca-40 at E-beam= 200 MeV and Cl-37+Ca-44 at E-beam= 153 MeV. In the case of Ca-40+Ca-40 reaction an hindrance of first-step gamma-decay is expected because in self-conjugate nuclei the E1 selection rules forbid the decay between states with isospin I=0. The results obtained at finite temperature (T similar to 2 MeV) have been used to extrapolate the degree of mixing at zero temperature.

IRIS type:

01 - Articolo su periodico

Keywords:

giant-dipole resonance; isobaric analog resonances; proton-DRIP-line; nuclei; symmetry; states; restoration; excitation; radiation; decay

List of contributors: