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Description:

We are developing a laser spectroscopic method for the study of nuclear structure of radioactive isotope utilizing superfluid helium (He II). In the method, He II is used as an efficient stopper for highly energetic ion beams and as an in-situ laser spectroscopic environment. Recently, we conducted an ion stopping experiment for the energy of approximately 350 AMeV 84Rb37+ at QST-HIMAC. Radioactive 84Rb ions were produced via projectile fragmentation reaction using accelerated 84Kr36+ and 12-mm thickness Be target. As the first step, we measured the stopping range of the injected ion beam using liquid N2 to estimate the stopping range in He II and the spot size of the injected ion beam using a plastic scintillator. Then, laser-induced fluorescence (LIF) detection experiment was performed using He II. We successfully observed the LIF from 84Rb atoms. We estimated stopping range of 84Rb ions in superfluid helium from the obtained results. The details of experiment at QST-HIMAC and results are given in this report.

Description:

We are developing a laser spectroscopic method for the study of nuclear structure
of radioactive isotope utilizing superfluid helium (He II). In the method, He
II is used as an efficient stopper for highly energetic ion beams and as an in-situ
laser spectroscopic environment. Recently, we conducted an ion stopping experiment
for the energy of approximately 350 AMeV 84Rb37+ at QST-HIMAC.
Radioactive 84Rb ions were produced via projectile fragmentation reaction using
accelerated 84Kr36+ and 12-mm thickness Be target. As the first step, we measured
the stopping range of the injected ion beam using liquid N2 to estimate
the stopping range in He II and the spot size of the injected ion beam using a
plastic scintillator. Then, laser-induced fluorescence (LIF) detection experiment
was performed using He II. We successfully observed the LIF from 84Rb atoms.
We estimated stopping range of 84Rb ions in superfluid helium from the obtained
results. The details of experiment at QST-HIMAC and results are given in this
report.

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• In Copyright
  

  This version of the article has been accepted for publication, after peer review (when applicable) and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: https://doi.org/10.1007/s10751-024-01889-y.

Keyword: Ion beam stopping in liquid, Superfluid helium, Nuclear physics experiment , Matrix laser spectroscopy

Date published: 2024-04-11

Publisher:

Journal:

• Interactions vol. 245 69

Conference:

Funding:

• JSPS KAKENHI 18H05457
• RIKEN Pioneering Projects Fundamental Principles Underlying the Hierarchy of Matter

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4517

First published URL: https://doi.org/10.1007/s10751-024-01889-y

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Updated at: 2025-04-14 16:30:09 +0900

Published on MDR: 2025-04-14 14:56:25 +0900