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Commissioning and full realization of a collinear resonance ionization spectroscopy setup at Beijing Radioactive Ion-beam Facility

W. C. Mei1,*, H. R. Hu1,*, Y. F. Guo1,*, Z. Yan1,*, X. F. Yang1,†, S. J. Chen1, D. Y. Chen1, Y. P. Lin1, Y. S. Liu1 et al.

C. Zhang1, Y. P. Jing1, T. X. Gao1, X. Shen1, Y. Y. Jia1, Y. T. Lin1, H. X. Zhang1, S. W. Bai2, B. Tang3,‡, X. Ma3, G. F. Song3, S. Ye3, M. Y. Lu3, J. Y. Dong3, B. K. Dong3, J. H. Lv4, S. Y. Dong5, F. C. Liu6, Z. Hu6, X. Liu6, S. T. Zhu6, Y. L. Yi6, C. Y. He3, A. Takamine7,8, B. Q. Cui3, J. Yang4, Z. Y. Liu5, J. Su6, H. N. Liu6, Y. L. Ye1, and B. Guo3

  • *These authors contributed equally to this work.
  • †Contact author: xiaofei.yang@pku.edu.cn
  • ‡Contact author: tangb364@ciae.ac.cn
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Phys. Rev. Research 8, 023286 – Published 12 June, 2026

DOI: https://doi.org/10.1103/gp2b-krwb

Abstract

A PLASEN (Precision LAser Spectroscopy for Exotic Nuclei) system, consisting of a compact radio-frequency quadrupole cooler buncher (RFQ-cb) and a collinear resonance ionization spectroscopy setup, has now been fully commissioned with radioactive ion beams at the Beijing Radioactive Ion-beam Facility (BRIF). Using both stable and radioactive Rb ion beams from BRIF, we demonstrated that the large beam energy spread observed at BRIF has been successfully handled by employing the RFQ-cb, enabling the delivery of high-quality bunched radioactive ion beams for collinear resonance ionization spectroscopy experiments. Under these conditions, we performed laser spectroscopy of exotic nuclei, achieving high resolution (∼100MHz spectral linewidth) and high sensitivity (∼1:200 efficiency). This fully operational PLASEN system will serve as a state-of-the-art experimental platform at BRIF for research in multiple fields such as nuclear, atomic, and molecular physics.

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Phys. Rev. Research 8, 023286– Published 12 June, 2026
  • Received 4 March 2026
  • Accepted 18 May 2026
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