arXiv 0806.48832008-06-30nucl-ex

超形变~（151）Tb和~（196）Pb连续γ跃迁有序到混沌区的探测

Probing the order-to-chaos region in superdeformed 151Tb and 196Pb nuclei with continuum gamma-transitions

S. Leoni, G. Benzoni, N. Blasi, A. Bracco, S. Brambilla, F. Camera, A. Corsi, F. C. L. Crespi, P. Mason, B. Million, D. Montanari, M. Pignanelli, E. Vigezzi, O.… 展开作者

S. Leoni, G. Benzoni, N. Blasi, A. Bracco, S. Brambilla, F. Camera, A. Corsi, F. C. L. Crespi, P. Mason, B. Million, D. Montanari, M. Pignanelli, E. Vigezzi, O. Wieland, M. Matsuo, Y. R. Shimizu, P. Bednarczyk, M. Castoldi, D. Curien, G. Duchene, B. Herskind, M. Kmiecik, A. Maj, W. Meczynski, J. Robin, J. Styczen, M. Zieblinski, K. Zuber, A. Zucchiatti

发表信息：: Phys.Rev.Lett.101:142502,2008
DOI：: 10.1103/PhysRevLett.101.142502

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摘要：

用EUROBALL IV阵列测量了超形变核151 Tb和196 Pb的暖旋转γ衰变。几个独立的数量提供了一个严格的测试人口和衰变动力学的SD好。基于微观计算的γ衰变的蒙特卡罗模拟给出了与数据的显著一致性，仅假设在低激发能下B（E1）强度的大增强，这可能与两个质量区域中八极振动的证据有关。

英文摘要：

The gamma-decay associated with the warm rotation of the superdeformed (SD) nuclei 151Tb and 196Pb has been measured with the EUROBALL IV array. Several independent quantities provide a stringent test of the population and decay dynamics in the SD well. A Monte Carlo simulation of the gamma-decay based on microscopic calculations gives remarkable agreement with the data only assuming a large enhancement of the B(E1) strength at low excitation energy, which may be related to the evidence for octupole vibrations in both mass regions.

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