$γ$ - 雷强度功能在霓虹灯同位素中的演变

论文标题

$γ$ - 雷强度功能在霓虹灯同位素中的演变

Evolution of the $γ$-ray strength function in neodymium isotopes

论文作者

Guttormsen, M., Ay, K. O., Ozgur, M., Algin, E., Larsen, A. C., Garrote, F. L. Bello, Berg, H. C., Campo, L. Crespo, Dahl-Jacobsen, T., Furmyr, F. W., Gjestvang, D., Görgen, A., Hagen, T. W., Ingeberg, V. W., Kheswa, B. V., Kullmann, I. K. B., Klintefjord, M., Markova, M., Midtbø, J. E., Modamio, V., Paulsen, W., Pedersen, L. G., Renstrøm, T., Sahin, E., Siem, S., Tveten, G. M., Wiedeking, M.

论文摘要

已经研究了142,144-151ND的实验性伽马射线强度函数（伽马-SF），以持续到中子分离能的γ射线能量。结果代表了一组独特的同位素链的γ-SF，核变形增加。数据揭示了低能增强，剪刀模式和侏儒偶极子共振如何随核变形和质量数演化而来。数据表明，低能增强和剪刀模式背后的机制彼此分离。

The experimental gamma-ray strength functions (gamma-SFs) of 142,144-151Nd have been studied for gamma-ray energies up to the neutron separation energy. The results represent a unique set of gamma-SFs for an isotopic chain with increasing nuclear deformation. The data reveal how the low-energy enhancement, the scissors mode and the pygmy dipole resonance evolve with nuclear deformation and mass number. The data indicate that the mechanisms behind the low-energy enhancement and the scissors mode are decoupled from each other.

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