用（p，2p）准无散射反应探测z = 6个自旋轨道壳间隙

论文标题

用（p，2p）准无散射反应探测z = 6个自旋轨道壳间隙

Probing the Z = 6 spin-orbit shell gap with (p,2p) quasi-free scattering reactions

论文作者

Syndikus, I., Petri, M., Macchiavelli, A. O., Paschalis, S., Bertulani, C. A., Aumann, T., Alvarez-Pol, H., Atar, L., Beceiro-Novo, S., Benlliure, J., Boillos, J. M., Boretzky, K., Borge, M. J. G., Brown, B. A., Caamaño, M., Caesar, C., Casarejos, E., Catford, W., Cederkall, J., Chulkov, L. V., Cortina-Gil, D., Cravo, E., Crespo, R., Dillmann, I., Fernández, P. Díaz, Elekes, Z., Enders, J., Farinon, F., Fraile, L. M., Redondo, D. Galaviz, Geissel, H., Gernhäuser, R., Golubev, P., Göbel, K., Heil, M., Heine, M., Heinz, A., Henriques, A., Holl, M., Johansson, H. T., Jonson, B., Kalantar-Nayestanaki, N., Kanungo, R., Kelic-Heil, A., Kröll, T., Kurz, N., Langer, C., Bleis, T. Le, Machado, J. F. D. C., Marganiec-Gałazka, J., Nacher, E., Nilsson, T., Nociforo, C., Panin, V., Perea, A., Pietri, S. B., Plag, R., Reifarth, R., Revel, A., Ribeiro, G., Rigollet, C., Rossi, D. M., Savran, D., Scheit, H., Simon, H., Sorlin, O., Tengblad, O., Togano, Y., Vandebrouck, M., Volkov, V., Wheldon, F. Wamers C., Wilson, G. L., Winfield, J. S., Weick, H., Woods, P., Yakorev, D., Zhukov, M., Zilges, A., Zuber, K.

论文摘要

传统核魔法数量远离稳定谷的演变是一个积极的研究领域。实验努力的重点是提供关键的光谱信息，这些信息将使外来核的结构融为一体，并了解壳演化背后的驾驶机制。在这项工作中，我们研究了Z = 6旋转轨道壳向中子滴管的缝隙。为此，我们采用$^{a} $ n（p，2p）$^{a-1} $ c quasi-free散射反应来测量2 $^+_ 1 $状态的质子组件$^{16,18,20} $ c。实验发现支持了质子1p $ _ {1/2} $ - 1p $ _ {3/2} $ spin-orbit拆分的中等减少的概念，这与最近普遍存在的Z = 6魔术数字的声称差异。

The evolution of the traditional nuclear magic numbers away from the valley of stability is an active field of research. Experimental efforts focus on providing key spectroscopic information that will shed light into the structure of exotic nuclei and understanding the driving mechanism behind the shell evolution. In this work, we investigate the Z = 6 spin-orbit shell gap towards the neutron dripline. To do so, we employed $^{A}$N(p,2p)$^{A-1}$C quasi-free scattering reactions to measure the proton component of the 2$^+_1$ state of $^{16,18,20}$C. The experimental findings support the notion of a moderate reduction of the proton 1p$_{1/2}$-1p$_{3/2}$ spin-orbit splitting, at variance to recent claims for a prevalent Z = 6 magic number towards the neutron dripline.

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