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arXiv · 1403.6912

Proton widths of the low-lying 16F states from the 15N(7Li, 6Li)16N reaction

Z. D. Wu·B. Guo·Z. H. Li·Y. J. Li·J. Su·D. Y. Pang·S. Q. Yan·E. T. Li·X. X. Bai·X. C. Du·Q. W. Fan·L. Gan·J. J. He·S. J. Jin·L. Jing·L. Li·Z. C. Li·G. Lian·J. C. Liu·Y. P. Shen·Y. B. Wang·X. Q. Yu·S. Zeng·D. H. Zhang·L. Y. Zhang·W. J. Zhang·W. P. Liu
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Abstract

All the 16F levels are unbound by proton emission. To date the four low-lying 16F levels below 1 MeV have been experimentally identified with well established spin-parity values and excitation energies with an accuracy of 4 - 6 keV. However, there are still considerable discrepancies for their level widths. The present work aims to explore these level widths through an independent method. The angular distributions of the 15N(7Li, 6Li)16N reaction leading to the first four states in 16N were measured using a high-precision Q3D magnetic spectrograph. The neutron spectroscopic factors and the asymptotic normalization coefficients for these states in 16N were then derived based on distorted wave Born approximation analysis. The proton widths of the four low-lying resonant states in 16F were obtained according to charge symmetry of strong interaction.

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Z. D. Wu, B. Guo, Z. H. Li, Y. J. Li, J. Su, D. Y. Pang, S. Q. Yan, E. T. Li, X. X. Bai, X. C. Du, Q. W. Fan, L. Gan, J. J. He, S. J. Jin, L. Jing, L. Li, Z. C. Li, G. Lian, J. C. Liu, Y. P. Shen, Y. B. Wang, X. Q. Yu, S. Zeng, D. H. Zhang, L. Y. Zhang, W. J. Zhang, W. P. Liu. 2014-03-27. Proton widths of the low-lying 16F states from the 15N(7Li, 6Li)16N reaction. https://doi.org/10.1103/physrevc.89.054315

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