학술논문
Observation of the near-threshold intruder $0^-$ resonance in $^{12}$Be
Document Type
Working Paper
Author
Chen, J.; Wang, S. M.; Fortune, H. T.; Lou, J. L.; Ye, Y. L.; Li, Z. H.; Michel, N.; Li, J. G.; Yuan, C. X.; Ge, Y. C.; Li, Q. T.; Hua, H.; Jiang, D. X.; Yang, X. F.; Pang, D. Y.; Xu, F. R.; Zuo, W.; Pei, J. C.; Li, J.; Jiang, W.; Sun, Y. L.; Zang, H. L.; Aoi, N.; Ong, H. J.; Ideguchi, E.; Ayyad, Y.; Hatanaka, K.; Tran, D. T.; Bazin, D.; Lee, J.; Zhang, Y. N.; Wu, J.; Liu, H. N.; Wen, C.; Yamamoto, T.; Tanaka, M.; Suzuki, T.
Source
Subject
Language
Abstract
A resonant state at $3.21^{+0.12}_{-0.04}$\,MeV, located just above the one-neutron separation threshold, was observed for the first time in $^{12}$Be from the $^{11}$Be\,$(d,p)^{12}$Be one-neutron transfer reaction in inverse kinematics. This state is assigned a spin-parity of $0^-$, according to the distorted-wave Born approximation (DWBA) and decay-width analysis. Gamow coupled-channel (GCC) and Gamow shell-model (GSM) calculations show the importance of the continuum-coupling, which dramatically influences the excitation energy and ordering of low-lying states. Various exotic structures associated with cross-shell intruding configurations in $^{12}$Be and in its isotonic nucleus $^{11}$Li are comparably discussed.