由单极张量相互作用驱动的64ni中的零自旋共存形状共存

论文标题

由单极张量相互作用驱动的64ni中的零自旋共存形状共存

Shape Coexistence at Zero Spin in 64Ni Driven by the Monopole Tensor Interaction

论文作者

Mărginean, N., Little, D., Tsunoda, Y., Leoni, S., Janssens, R. V. F., Fornal, B., Otsuka, T., Michelagnoli, C., Stan, L., Crespi, F. C. L., Costache, C., Lica, R., Sferrazza, M., Turturica, A., Ayangeakaa, A. D., Auranen, K., Barani, M., Bender, P. C., Bottoni, S., Boromiza, M., Bracco, A., Călinescu, S., Campbell, C. M., Carpenter, M. P., Chowdhury, P., Ciemała, M., Cieplicka-Orynczak, N., Cline, D., Clisu, C., Crawford, H. L., Dinescu, I. E., Filipescu, D., Florea, N., Forney, A. M., Fracassetti, S., Gade, A., Gheorghe, I., Hayes, A. B., Harca, I., Henderson, J., Ionescu, A., Iskra, Ł. W., Jentschel, M., Kandzia, F., Kim, Y. H., Kondev, F. G., Korschinek, G., Köster, U., Krishichayan, Krzysiek, M., Lauritsen, T., Li, J., Mărginean, R., Maugeri, E. A., Mihai, C., Mihai, R. E., Mitu, A., Mutti, P., Negret, A., Niţă, C. R., Olăcel, A., Oprea, A., Pascu, S., Petrone, C., Porzio, C., Rhodes, D., Seweryniak, D., Schumann, D., Sotty, C., Stolze, S. M., Şuvăilă, R., Toma, S., Ujeniuc, S., Walters, W. B., Wu, C. Y., Wu, J., Zhu, S., Ziliani, S.

论文摘要

半型64NI核的低自旋结构已大大扩展：将四个实验结合在一起，在4.5 MeV以下确定了几个0+和2+激发态，并确定了它们的性质。蒙特卡洛壳模型解释了结果，并揭示了共存形状的出乎意料的复杂景观：pr酸0+激发位于令人惊讶的高能量（3463 keV），其集体2+状态286 keV高于其，这是Ni同位素的第一个这样的观察结果。跨中子n = 40子壳间隙的岩体最小值的激发能的演变突出了单极相互作用的影响及其与n的强度变化。

The low-spin structure of the semimagic 64Ni nucleus has been considerably expanded: combining four experiments, several 0+ and 2+ excited states were identified below 4.5 MeV, and their properties established. The Monte Carlo shell model accounts for the results and unveils an unexpectedly complex landscape of coexisting shapes: a prolate 0+ excitation is located at a surprisingly high energy (3463 keV), with a collective 2+ state 286 keV above it, the first such observation in Ni isotopes. The evolution in excitation energy of the prolate minimum across the neutron N = 40 subshell gap highlights the impact of the monopole interaction and its variation in strength with N.

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