Development of Low Radioactive Molecular Sieves for Ultra-Low Background Particle Physics Experiment

H. Ogawa; K. Abe; M. Matsukura; H. Mimura

doi:10.1088/1748-0221/15/01/P01039

Development of Low Radioactive Molecular Sieves for Ultra-Low Background Particle Physics Experiment

Instrumentation and Detectors 2020-04-22 v3

Authors: H. Ogawa , K. Abe , M. Matsukura , H. Mimura

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Abstract

This study develops low radioactive molecular sieves (MS) for ultra-low background particle physics experiment. The manufactured MS is of type 4A. $^{226}$ Ra and $^{232}$ Th have concentrations of about 57 and 198 mBq/kg, respectively, measured by applying high-purity germanium (HPGe) measurement. The reduction of the radioactivity from the commercial one is about 99 and 97 percent for $^{226}$ Ra and $^{232}$ Th, respectively. Furthermore, the radon emanation rate from MS filter is about 2.1 mBq, which is measured by utilizing pin-photo type radon detector. This developed MS is expected to remove the impurity from the noble gas, in which low radioactivity is needed such as dark matter search experiment.

Keywords

low radioactive molecular sieves ultra-low background particle physics experiment radon emanation high-purity germanium dark matter search

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@article{arxiv.1910.02617,
  title  = {Development of Low Radioactive Molecular Sieves for Ultra-Low Background Particle Physics Experiment},
  author = {H. Ogawa and K. Abe and M. Matsukura and H. Mimura},
  journal= {arXiv preprint arXiv:1910.02617},
  year   = {2020}
}

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7 pages, 1 figure

Development of Low Radioactive Molecular Sieves for Ultra-Low Background Particle Physics Experiment

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