Octupole signatures in Ba-124,Ba-125

Mason, P.; Benzoni, G.; Bracco, A.; Camera, F.; Million, B.; Wieland, O.; Leoni, S.; Singh, A.K.; Al Khatib, A.; Hubel, H.; Bringel, P.; Burger, A.; Neusser, A.; Schonwasser, G.; Hagemann, G.B.; Hansen, C.R.; Herskind, B.; Sletten, G.; Algora, A.; Dombradi, Z.; Gal, J.; Kalinka, G.; Molnar, J.; Nyako, B.M.; Sohler, D.; Timar, J.; Zolnai, L.; Kmiecik, M.; Maj, A.; Styczen, J.; Zuber, K.; Azaiez, F.; Hauschild, K.; Korichi, A.; Lopez Martens, A.; Roccaz, J.; Siem, S.; Hannachi, F.; Scheurer, J.N.; Bednarczyk, P.; Byrski, T.; Curien, D.; Dorvaux, O.; Duchene, G.; Gall, B.; Khalfallah, F.; Piqueras, I.; Robin, J.; Juhasz, K.; Patel, S.B.; Evans, A.O.; Rainovski, G.; Petrache, C.M.; Petrache, D.; La Rana, G.; Moro, R.; De Angelis, G.; Fallon, P.; Lee, I.Y.; Lisle, J.C.; Cederwall, B.; Lagergen, K.; Lieder, R.M.; Podsvirova, E.; Gast, W.; Jager, H.; Redon, N.; Gorgen, A.

doi:10.1088/0954-3899/31/10/063

The gamma decay of the nuclei Ba-121,Ba-125 has been investigated with the EUROBALL array, using the reaction Ni-64+Ni-64 at E-beam = 255 and 261 MeV. Six new E1 transitions have been found in the nucleus Ba-125, suggesting a significant role of octupole correlations in the origin of its parity doublets. The J(pi) = 3(-) level of the nucleus Ba-124 has been identified for the first time. Its excitation energy is in very good agreement with a prediction based on a microscopic model including octupole interactions.

Octupole signatures in Ba-124,Ba-125 / P. Mason, G. Benzoni, A. Bracco, F. Camera, B. Million, O. Wieland, S. Leoni, A.K. Singh, A. Al-Khatib, H. Hubel, P. Bringel, A. Burger, A. Neusser, G. Schonwasser, G.B. Hagemann, C.R. Hansen, B. Herskind, G. Sletten, A. Algora, Z. Dombradi, J. Gal, G. Kalinka, J. Molnar, B.M. Nyako, D. Sohler, J. Timar, L. Zolnai, M. Kmiecik, A. Maj, J. Styczen, K. Zuber, F. Azaiez, K. Hauschild, A. Korichi, A. Lopez-Martens, J. Roccaz, S. Siem, F. Hannachi, J.N. Scheurer, P. Bednarczyk, T. Byrski, D. Curien, O. Dorvaux, G. Duchene, B. Gall, F. Khalfallah, I. Piqueras, J. Robin, K. Juhasz, S.B. Patel, A.O. Evans, G. Rainovski, C.M. Petrache, D. Petrache, G. La Rana, R. Moro, G. De Angelis, P. Fallon, I.Y. Lee, J.C. Lisle, B. Cederwall, K. Lagergen, R.M. Lieder, E. Podsvirova, W. Gast, H. Jager, N. Redon, A. Gorgen. - In: JOURNAL OF PHYSICS. G, NUCLEAR AND PARTICLE PHYSICS. - ISSN 0954-3899. - 31:10(2005 Oct), pp. S1729-S1733. [10.1088/0954-3899/31/10/063]