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Commissioning and Full Realization of the PLASEN System at BRIF
Authors:
W. C. Mei,
H. R. Hu,
Y. F. Guo,
Z. Yan,
X. F. Yang,
S. J. Chen,
D. Y. Chen,
Y. P. Lin,
Y. S. Liu,
C. Zhang,
Y. P. Jing,
T. X. Gao,
X. Shen,
Y. Y. Jia,
Y. T. Lin,
H. X. Zhang,
S. W. Bai,
B. Tang,
X. Ma,
G. F. Song,
S. Ye,
M. Y. Lu,
J. Y. Dong,
B. K. Dong,
J. H. Lv
, et al. (15 additional authors not shown)
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 b…
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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 (about 100 MHz spectral linewidth) and high sensitivity (up to 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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Submitted 4 March, 2026;
originally announced March 2026.
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Development and Characterization of a High-Resolution and High-Sensitivity Collinear Resonance Ionization Spectroscopy Setup
Authors:
H. R. Hu,
Y. F. Guo,
X. F. Yang,
Z. Yan,
W. C. Mei,
S. J. Chen,
Y. S. Liu,
P. Zhang,
S. W. Bai,
D. Y. Chen,
Y. C. Liu,
S. J. Wang,
Q. T. Li,
Y. L. Ye,
C. Y. He,
J. Yang,
Z. Y. Liu
Abstract:
With the recent implementation of a radio-frequency quadrupole (RFQ) cooler-buncher and a multi-step laser resonance ionization technique, our previously developed collinear laser spectroscopy setup has been successfully upgraded into a fully functional collinear resonance ionization spectroscopy system. The new system was fully characterized using a bunched ion beam at 30~keV, during which hyperf…
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With the recent implementation of a radio-frequency quadrupole (RFQ) cooler-buncher and a multi-step laser resonance ionization technique, our previously developed collinear laser spectroscopy setup has been successfully upgraded into a fully functional collinear resonance ionization spectroscopy system. The new system was fully characterized using a bunched ion beam at 30~keV, during which hyperfine structure spectra of $^{85,87}$Rb isotopes were measured. An overall efficiency exceeding 1:200 (one resonant ion detected for every 200 ions after the RFQ cooler-buncher) was achieved while maintaining a spectral resolution of 100 MHz. Under these conditions, the extracted hyperfine structure parameters and isotope shift for $^{85,87}$Rb show excellent agreement with the literature values. These results demonstrate the system's capability to perform high-resolution and high-sensitivity laser spectroscopy of neutron-rich Rb isotopes, which are expected to be produced at the Beijing Radioactive Ion-beam Facility at a rate of approximately 100 particles per second.
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Submitted 21 May, 2025; v1 submitted 26 March, 2025;
originally announced March 2025.
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Construction and commissioning of the collinear laser spectroscopy system at BRIF
Authors:
S. J. Wang,
X. F. Yang,
S. W. Bai,
Y. C. Liu,
P. Zhang,
Y. S. Liu,
H. R. Hu,
H. W. Li,
B. Tang,
B. Q. Cui,
C. Y. He,
X. Ma,
Q. T. Li,
J. H. Chen,
K. Ma,
L. S. Yang,
Z. Y. Hu,
W. L. Pu,
Y. Chen,
Y. F. Guo,
Z. Y. Du,
Z. Yan,
F. L. Liu,
H. R. Wang,
G. Q. Yang
, et al. (2 additional authors not shown)
Abstract:
We have constructed a collinear laser spectroscopy (CLS) system installed at the Beijing Radioactive Ion-beam Facility (BRIF), aiming to investigate the nuclear properties of unstable nuclei. The first on-line commissioning experiment of this system was performed using the continuous stable ($^{39}$K) and unstable ($^{38}$K) ion beams produced by impinging a 100-MeV proton beam on a CaO target. Hy…
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We have constructed a collinear laser spectroscopy (CLS) system installed at the Beijing Radioactive Ion-beam Facility (BRIF), aiming to investigate the nuclear properties of unstable nuclei. The first on-line commissioning experiment of this system was performed using the continuous stable ($^{39}$K) and unstable ($^{38}$K) ion beams produced by impinging a 100-MeV proton beam on a CaO target. Hyperfine structure spectra of these two isotopes are reasonably reproduced, and the extracted magnetic dipole hyperfine parameters and isotope shift agree with the literature values. The on-line experiment demonstrates the overall functioning of this CLS system, opening new opportunities for laser spectroscopy measurement of unstable isotopes at BRIF and other radioactive ion beam facilities in China.
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Submitted 11 March, 2022;
originally announced March 2022.