Abstract
The reaction dynamics of exotic nuclei near the drip line is one of the main research topics of current interest. Elastic scattering is a useful probe for investigating the size and surface diffuseness of exotic nuclei. The development of rare isotope accelerators offers opportunities for such studies. To date, many relevant measurements have been performed at accelerators using the projectile fragmentation technique, while the measurements at accelerators using isotope separator on-line (ISOL) systems are still quite scarce. In this work, we present the first proof-of-principle experiment with a post-accelerated ISOL beam at the Beijing Radioactive Ion Beam Facility (BRIF) by measuring the angular distribution of elastic scattering for the stable nucleus \(^{23}\)Na from the doubly magic nucleus \(^{40}\)Ca at energies above the Coulomb barrier. The angular distribution measured by a silicon strip detector array in a scattering chamber using the ISOL beam at BRIF is in good agreement with that measured by the high-precision Q3D magnetic spectrograph using the non-ISOL beam at nearly the same energy. This work provides useful background for making BRIF a powerful tool for the investigation of the reaction dynamics of exotic nuclei.
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All authors contributed to the study conception and design. Experiment was carried out by Wei Nan, Cheng-Jian Lin, Lei Yang, Dong-Xi Wang, Yang-Ping Shen, Hui-Ming Jia, Yun-Ju Li, and Xin-Yue Li. Targets were made by Qi-Wen Fan. Data analysis was performed by Wei Nan, Bing Guo, Cheng-Jian Lin, Yang-Ping Shen, Dan-Yang Pang, and Wei-Ping Liu. The ISOL beam was developed by Bing Tang, Bao-Qun Cui, Tao Ge, Yin-Long Lyu, Li-Hua Chen, Jian-Cheng Liu, Rui-Gang Ma, Xie Ma, Ying-Jun Ma, and Tian-Jue Zhang. The first draft of the manuscript was written by Wei Nan and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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This work was supported by the National Natural Science Foundation of China (Nos. 11490561, 11635015, 11961141003, 11805280, 11975316, 12075045, 12005304, U1867212, and U1867214), the National Key Research and Development Project (Nos. 2016YFA0400502 and 2018YFA0404404), the Continuous Basic Scientific Research Project (No. WDJC-2019-13), and the Leading Innovation Project (Nos. LC192209000701 and LC202309000201).
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Nan, W., Guo, B., Lin, CJ. et al. First proof-of-principle experiment with the post-accelerated isotope separator on-line beam at BRIF: measurement of the angular distribution of \(^{23}\)Na + \(^{40}\)Ca elastic scattering. NUCL SCI TECH 32, 53 (2021). https://doi.org/10.1007/s41365-021-00889-9
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DOI: https://doi.org/10.1007/s41365-021-00889-9