Commissioning and Full Realization of the PLASEN System at BRIF

TL;DR

The paper reports the full commissioning of the PLASEN system at BRIF, combining a RFQ cooler-buncher and resonance ionization spectroscopy to produce high-quality radioactive ion beams for advanced nuclear, atomic, and molecular research.

Contribution

It introduces the fully operational PLASEN system at BRIF, demonstrating high-resolution spectroscopy with radioactive ion beams and handling large beam energy spreads effectively.

Findings

Successful handling of large beam energy spread at BRIF

High-resolution laser spectroscopy achieved (~100 MHz linewidth)

High sensitivity with up to 1:200 efficiency

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 (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.