First investigation of the <math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><mmultiscripts><mi>Bi</mi><mprescripts></mprescripts><none></none><mn>209</mn></mmultiscripts><mo>(</mo><mmultiscripts><mi>Li</mi><mprescripts></mprescripts><none></none><mn>6</mn></mmultiscripts><mo>,</mo><msup><mrow><mmultiscripts><mi>Li</mi><mprescripts></mprescripts><none></none><mn>7</mn></mmultiscripts></mrow><mo>*</mo></msup><mo>→</mo><mi>α</mi><mo>+</mo><mi>t</mi><mo>)</mo><mmultiscripts><mi>Bi</mi><none></none><mo>*</mo><mprescripts></mprescripts><none></none><mn>208</mn></mmultiscripts></mrow></math> breakup channel

Y. S. Wu; G. X. Zhang; N. Keeley; C. J. Lin; N. R. Ma; L. Yang; H. M. Jia; S. P. Hu; H. Q. Zhang; M. Mazzocco; Y. J. Yao; C. Cheng; C. L. Zhang; K. Dong; H. B. Lv; J. L. Chen; L. Jiang; R. Cao; B. R. Gonçalves; C. Huang; Y. NZ. Tan; G. L. Zhang

doi:10.1103/bqs3-vr6d

First investigation of the ${}^{209}{Bi} ({}^{6}{Li}, {}^{7}{Li}^{} \to α + t) {}^{208}{Bi}^{}$ breakup channel

Y. S. Wu ¹, G. X. Zhang ^2,*, N. Keeley^3,†, C. J. Lin ^4,‡, N. R. Ma⁴, L. Yang ⁴, H. M. Jia⁴, S. P. Hu⁵, H. Q. Zhang ⁴ et al.

M. Mazzocco ^6,7, Y. J. Yao ¹, C. Cheng ¹, C. L. Zhang^8,9, K. Dong ¹, H. B. Lv ¹, J. L. Chen ¹, L. Jiang¹, R. Cao¹, B. R. Gonçalves ¹, C. Huang¹, Y. NZ. Tan¹, and G. L. Zhang^1,§

¹School of Physics, Beihang University, Beijing 100191, China
²Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-Sen University, Zhuhai 519082, China
³National Centre for Nuclear Research, ul. Andrzeja Sołtana 7, 05-400 Otwock, Poland
⁴China Institute of Atomic Energy, Beijing 102413, China
⁵Institute for Advanced Study in Nuclear Energy & Safety, Shenzhen University, Shenzhen 518060, China
⁶Dipartimento di Fisica e Astronomia, Università di Padova, Padova 35131, Italy
⁷Istituto Nazionale di Fisica Nucleare, Sezione di Padova, Padova 35131, Italy
⁸Key Laboratory of Beam Technology of Ministry of Education, School of Physics and Astronomy, Beijing Normal University, Beijing 100875, China
⁹Key Laboratory of Beam Technology of Ministry of Education, Institute of Radiation Technology, Beijing Academy of Science and Technology, Beijing 100875, China

^*Contact author: zhanggx37@mail.sysu.edu.cn
^†Contact author: nicholas.keeley@ncbj.gov.pl
^‡Contact author: cjlin@ciae.ac.cn
^§Contact author: zgl@buaa.edu.cn

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Phys. Rev. C 113, 044616 – Published 20 April, 2026

DOI: https://doi.org/10.1103/bqs3-vr6d

Abstract

The $({}^{6}{Li}, {}^{7}{Li}^{*}$ $\to$ $α$ $+$ $t)$ breakup channel has been investigated for the first time in an experiment with a ${}^{209}{Bi}$ target in which the 4.63-MeV $7 / 2^{-}$ and 6.68-MeV $5 / 2^{-}$ resonant states of ${}^{7}{Li}$ were well identified and extracted with the help of a large-solid-angle detector array. The angular distributions of ${}^{7}{Li}^{*}$ prior to its breakup were reconstructed via fragment coincidence measurements, which were well reproduced by detailed coupled discretized continuum channels (CDCC) plus coupled channel Born Approximation (CCBA) calculations. Further theoretical calculations indicate that the formation of the two resonant states of ${}^{7}{Li}$ proceeds mainly via a two-step mechanism, driven by the coupling between the projectile excitation and single nucleon transfer.

Physical Review C

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First investigation of the ${}^{209}{Bi} ({}^{6}{Li}, {}^{7}{Li}^{} \to α + t) {}^{208}{Bi}^{}$ breakup channel

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First investigation of the Bi209(Li6,Li7*→α+t)Bi*208 breakup channel

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First investigation of the ${}^{209}{Bi} ({}^{6}{Li}, {}^{7}{Li}^{} \to α + t) {}^{208}{Bi}^{}$ breakup channel