Article
Physics, Nuclear
Yan Li, D. Y. Pang
Summary: The study analyzed the effects of breakup reactions of Be-11 with a Pb-208 target on the elastic scattering angular distributions, revealing a suppression of the Coulomb-nuclear interference peaks. The weighted mean local polarization potentials obtained from continuum discretized coupled channel calculations were found to mimic the dynamic polarization potentials induced by the breakup coupling effects. Comparisons between the weighted mean local polarization potentials and the theoretically calculated Coulomb dipole polarization potentials suggested that the breakup coupling effect of the Be-11+Pb-208 system cannot be fully represented by the Coulomb dipole polarization potentials alone.
EUROPEAN PHYSICAL JOURNAL A
(2021)
Article
Physics, Nuclear
Z. W. Tan, J. L. Lou, Y. L. Ye, Y. Liu, D. Y. Pang, C. X. Yuan, J. G. Li, W. Liu, Y. Jiang, B. Yang, L. C. Tao, K. Ma, Z. H. Li, Q. T. Li, X. F. Yang, J. Y. Xu, H. Z. Yu, J. X. Han, S. W. Bai, S. W. Huang, G. Li, H. Y. Wu, H. L. Zang, J. Feng, J. S. Wang, Y. Y. Yang, P. Ma, Q. Hu, Z. Bai, Z. H. Gao, F. F. Duan, L. Y. Hu, J. H. Tan, S. Q. Sun, Y. S. Song, H. J. Ong, D. T. Tran, H. Y. Zhu, B. L. Xia
Summary: Two low-lying unbound states in C-16 were investigated using deuteron inelastic scattering in inverse kinematics. In addition to the previously measured 2(-) state at 5.45 MeV in a 1n knockout reaction, a new resonant state at 6.89 MeV was observed for the first time. The inelastic scattering angular distributions of these states were well reproduced by the distorted-wave Born approximation calculation with an l = 1 excitation. The spin-parities of the unbound states were tentatively assigned based on shell model calculations using the modified YSOX interaction.
Article
Physics, Nuclear
Yi-Ping Xu, Dan-Yang Pang, Cen-Xi Yuan, Xiao-Yan Yun
Summary: In this study, a systematic analysis was performed on the quenching of single-particle strengths of carbon isotopes using the Glauber model. The extracted quenching factors were found to be strongly dependent on the proton-neutron asymmetry.
Article
Physics, Nuclear
Zengqi Cui, Haoyu Jiang, Wei Jiang, Guohui Zhang, Ruirui Fan, Danyang Pang, Kang Sun, Huaiyong Bai, Yiwei Hu, Jie Liu, Han Yi, Changjun Ning, Zhijia Sun, Jingyu Tang, Qi An, Jie Bao, Yu Bao, Ping Cao, Haolei Chen, Qiping Chen, Yonghao Chen, Yukai Chen, Zhen Chen, Changqing Feng, Keqing Gao, Minhao Gu, Changcai Han, Zijie Han, Guozhu He, Yongcheng He, Yang Hong, Hanxiong Huang, Weiling Huang, Xiru Huang, Xiaolu Ji, Xuyang Ji, Zhijie Jiang, Hantao Jing, Ling Kang, Mingtao Kang, Bo Li, Chao Li, Jiawen Li, Lun Li, Qiang Li, Xiao Li, Yang Li, Rong Liu, Shubin Liu, Xingyan Liu, Guangyuan Luan, Qili Mu, Binbin Qi, Jie Ren, Zhizhou Ren, Xichao Ruan, Zhaohui Song, Yingpeng Song, Hong Sun, Xiaoyang Sun, Zhixin Tan, Hongqing Tang, Xinyi Tang, Binbin Tian, Lijiao Wang, Pengcheng Wang, Qi Wang, Taofeng Wang, Zhaohui Wang, Jie Wen, Zhongwei Wen, Qingbiao Wu, Xiaoguang Wu, Xuan Wu, Likun Xie, Yiwei Yang, Li Yu, Tao Yu, Yongji Yu, Linhao Zhang, Qiwei Zhang, Xianpeng Zhang, Yuliang Zhang, Zhiyong Zhang, Yubin Zhao, Luping Zhou, Zuying Zhou, Danyang Zhu, Kejun Zhu, Peng Zhu
Summary: This study measured the relative differential cross sections of neutron-deuteron elastic scattering using a white neutron source and compared the results with previous measurements, theoretical calculations, and data from libraries.
EUROPEAN PHYSICAL JOURNAL A
(2021)
Article
Astronomy & Astrophysics
Yangping Shen, Bing Guo, Richard J. deBoer, Ertao Li, Zhihong Li, Yunju Li, Xiaodong Tang, Danyang Pang, Sucheta Adhikari, Chinmay Basu, Jun Su, Shengquan Yan, Qiwen Fan, Jiancheng Liu, Chen Chen, Zhiyu Han, Xinyue Li, Gang Lian, Tianli Ma, Wei Nan, Weike Nan, Youbao Wang, Sheng Zeng, Hao Zhang, Weiping Liu
Summary: We present a precise measurement of the asymptotic normalization coefficient (ANC) for the O-16 ground state (GS), which has a strong effect on the C-12(alpha, gamma)O-16 reaction rate. Based on the new ANC, the astrophysical S-factor and stellar rate of the reaction are determined, leading to an increase in the total reaction rate within the temperature range of astrophysical relevance. The updated reaction rate also impacts the pair-instability mass gap for black holes.
ASTROPHYSICAL JOURNAL
(2023)
Article
Physics, Nuclear
X. Y. Li, B. Guo, Z. H. Li, Y. J. Li, J. Su, D. Y. Pang, J. J. He, S. Q. Yan, Q. W. Fan, J. C. Liu, L. Gan, Z. Y. Han, E. T. Li, G. Lian, Y. P. Shen, Y. B. Wang, S. Zeng, W. P. Liu
Summary: In this study, the neutron spectroscopic factors of N-16 states and the resulting N-15(n,γ)N-16 reaction rate were measured using a Q3D magnetic spectrograph. The results support the conclusion that these four states in 16N are good single-particle levels.
Article
Physics, Nuclear
Y. Z. Sun, S. T. Wang, Y. P. Xu, D. Y. Pang, J. G. Li, C. X. Yuan, L. F. Wan, Y. Qiao, Y. Q. Wang, X. Y. Chen
Summary: This study investigates the single-proton removal cross sections of various oxygen isotopes at intermediate energies and compares them with predictions from the Glauber reaction model. The results suggest that high beam energies enhance the applicability of the model and reveal the dependence of the spectroscopic strength reduction factor R-s on the binding depth Delta S of the removed nucleon.
Article
Physics, Nuclear
K. Wang, Y. Y. Yang, V. Guimaraes, D. Y. Pang, F. F. Duan, Z. Y. Sun, Jin Lei, G. Yang, S. W. Xu, J. B. Ma, Q. Liu, Z. Bai, H. J. Ong, B. F. Lv, S. Guo, X. H. Wang, R. H. Li, M. Kumar, Z. G. Hu, H. S. Xu
Summary: Elastic scattering measurements were performed to study the interaction between the proton drip-line nucleus 13O and its partner mirror nucleus 13B on a 208Pb target. The experimental results show that the angular distributions of these projectiles exhibit a typical Fresnel diffraction peak at forward angles.
Article
Physics, Nuclear
W. Liu, J. L. Lou, Y. L. Ye, S. M. Wang, Z. W. Tan, Z. H. Li, Q. T. Li, H. Hua, X. F. Yang, J. Y. Xu, H. J. Ong, D. T. Tran, N. Aoi, E. Ideguchi, D. Y. Pang, C. X. Yuan, Y. Jiang, B. Yang, Y. Liu, J. G. Li, Z. Q. Chen, J. X. Han, S. W. Bai, G. Li, K. Ma, H. Y. Zhu, B. L. Xia
Summary: In this study, the low-lying positive-parity states in Be-12 were investigated for the first time using a radioactive beam B-13 at 23 MeV/nucleon via the (2)H(B-13, He-3) reaction. The spectroscopic factors and excitation energies of these states were found to be in reasonable agreement with the predictions of the shell model. In addition to two bound states, a resonant state was observed at an energy of 4.8 +/- 0.1 MeV with an intrinsic width of 0.42 +/- 0.28 MeV. This resonance primarily decays via one neutron to the bound states in 11Be and is likely correlated to the previously observed state at 1.24 MeV in one-proton removal reaction. The spin-parity of 2(+) was tentatively assigned to this resonance based on the analysis of its angular distributions and theoretical calculations, including shell model and Gamow coupled-channel approach.
Article
Physics, Nuclear
F. F. Duan, Y. Y. Yang, Jin Lei, K. Wang, Z. Y. Sun, D. Y. Pang, J. S. Wang, X. Liu, S. W. Xu, J. B. Ma, P. Ma, Z. Bai, Q. Hu, Z. H. Gao, X. X. Xu, C. J. Lin, H. M. Jia, N. R. Ma, L. J. Sun, D. X. Wang, G. Yang, S. Y. Jin, Z. Z. Ren, Y. H. Zhang, X. H. Zhou, Z. G. Hu, H. S. Xu
Summary: Quasielastic scattering and breakup angular distributions of the neutron halo nucleus Be-11 on a Pb-208 target at 210 MeV were studied, revealing a suppression of CNIP and corresponding theoretical agreement with CDCC method. The experimental angular distribution of Be-10 fragments matched well with CDCC calculations and a model by Ichimura, Austern, and Vincent. Systematic comparisons between experimental and theoretical data showed sensitivity of elastic scattering with heavy targets at high incident energies to the structure of neutron-rich nuclei.
Article
Physics, Nuclear
W. Liu, J. L. Lou, Y. L. Ye, Z. H. Li, Q. T. Li, H. Hua, X. F. Yang, J. Y. Xu, H. J. Ong, D. T. Tran, N. Aoi, E. Ideguchi, D. Y. Pang, C. X. Yuan, S. M. Wang, Y. Jiang, B. Yang, Y. Liu, J. G. Li, Z. Q. Chen, J. X. Han, S. W. Bai, G. Li, K. Ma, Z. W. Tan, H. Y. Zhu, B. L. Xia
Summary: Experimental results of H-1(B-13, d) B-12 transfer reaction to the low-lying states in B-12 are reported, with extracted optical potential parameters for entrance and exit channels. Spectroscopic factors associated with neutron transfer to known B-12 states were determined, showing s- and d-wave intruder strengths in B-13(g.s.) follow systematics for N = 8 neutron-rich isotones. Further theoretical interpretation is needed for the sudden change of intruder sd-wave intensity between B-13 and Be-12.
Article
Physics, Nuclear
Y. Z. Sun, S. T. Wang, Z. Y. Sun, X. H. Zhang, S. Y. Jin, Y. X. Zhao, D. Y. Pang, S. W. Tang, D. Yan, P. Ma, Y. H. Yu, K. Yue, F. Fang, Y. J. Zhang, C. G. Lu, L. M. Duan
Summary: The inclusive single-neutron removal cross sections of C-14, C-15, and C-16 on a carbon target were measured at around 240 MeV/nucleon at the HIRFL-CSR External Target Facility and compared with Glauber model predictions. The experimental results for the spectroscopic factor reduction conform to earlier studies, with the incident beam energy affecting the single-nucleon removal process.
Article
Physics, Nuclear
J. Chen, S. M. Wang, H. T. Fortune, J. L. Lou, Y. L. Ye, Z. H. Li, N. Michel, J. G. Li, C. X. Yuan, Y. C. Ge, Q. T. Li, H. Hua, D. X. Jiang, X. F. Yang, D. Y. Pang, F. R. Xu, W. Zuo, J. C. Pei, J. Li, W. Jiang, Y. L. Sun, H. L. Zang, N. Aoi, H. J. Ong, E. Ideguchi, Y. Ayyad, K. Hatanaka, D. T. Tran, D. Bazin, J. Lee, Y. N. Zhang, J. Wu, H. N. Liu, C. Wen, T. Yamamoto, M. Tanaka, T. Suzuki
Summary: A resonant state at 3.21 MeV above the one-neutron separation threshold was observed for the first time in Be-12, with a spin-parity of 0(-). Calculations using Gamow coupled-channel and Gamow shell model showed the significant influence of continuum coupling on the excitation energy and ordering of low-lying states. Various exotic structures in Be-12 and its isotonic nucleus Li-11 were compared in the study.
Article
Nuclear Science & Technology
Wei Nan, Bing Guo, Cheng-Jian Lin, Lei Yang, Dong-Xi Wang, Yang-Ping Shen, Bing Tang, Bao-Qun Cui, Tao Ge, Yin-Long Lyu, Hui-Ming Jia, Yun-Ju Li, Chen Chen, Li-Hua Chen, Qi-Wen Fan, Xin-Yue Li, Gang Lian, Jian-Cheng Liu, Tian-Peng Luo, Nan-Ru Ma, Rui-Gang Ma, Xie Ma, Ying-Jun Ma, Wei-Ke Nan, Dan-Yang Pang, You-Bao Wang, Pei-Wei Wen, Feng Yang, Yong-Jin Yao, Sheng Zeng, Hao Zhang, Fu-Peng Zhong, Shan-Hao Zhong, Zhi-Hong Li, Tian-Jue Zhang, Wei-Ping Liu
Summary: The reaction dynamics of exotic nuclei near the drip line is a research topic of interest, with elastic scattering being a useful probe for investigating size and surface diffuseness. This study presents the first experiment using a post-accelerated ISOL beam at the Beijing Radioactive Ion Beam Facility, showing good agreement with measurements using non-ISOL beam, and providing useful background for utilizing BRIF as a powerful tool for investigating the reaction dynamics of exotic nuclei.
NUCLEAR SCIENCE AND TECHNIQUES
(2021)
Article
Physics, Nuclear
K. Wang, Y. Y. Yang, A. M. Moro, V Guimaraes, Jin Lei, D. Y. Pang, F. F. Duan, J. L. Lou, J. C. Zamora, J. S. Wang, Z. Y. Sun, H. J. Ong, X. Liu, S. W. Xu, P. Ma, Z. Bai, Q. Hu, X. X. Xu, Z. H. Gao, G. Yang, S. Y. Jin, Y. H. Zhang, X. H. Zhou, Z. G. Hu, H. S. Xu
Summary: Elastic scattering and breakup angular distributions of the weakly bound radioactive nucleus B-8 on a Pb-208 target at an incident energy of 238 MeV have been measured, showing no significant Coulomb rainbow suppression. The comparison with Be-11 breakup cross section suggests that Coulomb and centrifugal barriers may suppress the breakup cross section of B-8. The measured angular distribution of the Be-7 fragments could be reproduced by considering elastic plus nonelastic breakup contributions.
