High-spin states in Ba-124 were investigated in two experiments using the Ni-64(Ni-64, 4n)Ba-124 reaction at three different beam energies. In-beam gamma-ray coincidences were measured with the Euroball and Gammasphere detector arrays. In the experiment with Euroball, the CsI detector array Diamant was employed to discriminate against charged-particle channels. Six new rotational bands were observed in Ba-124, and previously known bands were extended to higher spins. One of the bands shows a transition from collective to noncollective behavior at high spins. Configuration assignments are suggested on the basis of comparison with cranked shell model and cranked Nilsson-Strutinsky calculations.
Competition between collective and noncollective excitation modes at high spin in 124Ba / A. Al-Khatib, A. K. Singh, H. Hubel, P. Bringel, A. Burger, J. Domscheit, A. Neußer-Neffgen, G. Schonwaßer, G. B. Hagemann, C. Ronn Hansen, B. Herskind, G. Sletten, J. N. Wilson, J. Timar, A. Algora, Zs. Dombradi, J. Gal, G. Kalinka, J. Molnar, B. M. Nyako, D. Sohler, L. Zolnai, R. M. Clark, M. Cromaz, P. Fallon, I. Y. Lee, A. O. Macchiavelli, D. Ward, H. Amro, W. C. Ma, M. Kmiecik, A. Maj, J. Styczen, K. Zuber, K. Hauschild, A. Korichi, A. Lopez-Martens, J. Roccaz, S. Siem, F. Hannachi, J. N. Scheurer, P. Bednarczyk, Th. Byrski, D. Curien, O. Dorvaux, G. Duchene, B. Gall, F. Khalfallah, I. Piqueras, J. Robin, A. Gorgen, K. Juhasz, S. B. Patel, A. O. Evans, G. Rainovski, G. Benzoni, A. Bracco, F. Camera, S. Leoni, P. Mason, B. Million, A. Paleni, R. Sacchi, O. Wieland, C. M. Petrache, D. Petrache, G. La Rana, R. Moro, G. De Angelis, J. C. Lisle, B. Cederwall, K. Lagergren, R. M. Lieder, E. Podsvirova, W. Gast, H. Jager, N. Redon. - In: PHYSICAL REVIEW. C, NUCLEAR PHYSICS. - ISSN 0556-2813. - 74:1(2006), pp. 014305.014305-1-014305.014305-18.
Competition between collective and noncollective excitation modes at high spin in 124Ba
G. Benzoni;A. Bracco;F. Camera;S. Leoni;P. Mason;R. Sacchi;
2006
Abstract
High-spin states in Ba-124 were investigated in two experiments using the Ni-64(Ni-64, 4n)Ba-124 reaction at three different beam energies. In-beam gamma-ray coincidences were measured with the Euroball and Gammasphere detector arrays. In the experiment with Euroball, the CsI detector array Diamant was employed to discriminate against charged-particle channels. Six new rotational bands were observed in Ba-124, and previously known bands were extended to higher spins. One of the bands shows a transition from collective to noncollective behavior at high spins. Configuration assignments are suggested on the basis of comparison with cranked shell model and cranked Nilsson-Strutinsky calculations.
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