Thermal properties of holmium-implanted gold films for a neutrino mass experiment with cryogenic microcalorimeters

K. Prasai, E. Alves, D. Bagliani, S. Basak Yanardag, M. Biasotti, M. Galeazzi, F. Gatti, M. Ribeiro Gomes, J. Rocha, Y. Uprety

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4 Scopus citations

Abstract

In a microcalorimetric neutrino mass experiment using the radioactive decay of 163Ho, the radioactive material must be fully embedded in the microcalorimeter absorber. One option that is being investigated is to implant the radioactive isotope into a gold absorber, as gold is successfully used in other applications. However, knowing the thermal properties at the working temperature of microcalorimeters is critical for choosing the absorber material and for optimizing the detector performance. In particular, it is paramount to understand if implanting the radioactive material in gold changes its heat capacity. We used a bolometric technique to measure the heat capacity of gold films, implanted with various concentrations of holmium and erbium (a byproduct of the 163Ho fabrication), in the temperature range 70 mK-300 mK. Our results show that the specific heat capacity of the gold films is not affected by the implant, making this a viable option for a future microcalorimeter holmium experiment.

Original languageEnglish (US)
Article number083905
JournalReview of Scientific Instruments
Volume84
Issue number8
DOIs
StatePublished - Aug 1 2013

ASJC Scopus subject areas

  • Instrumentation

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    Prasai, K., Alves, E., Bagliani, D., Yanardag, S. B., Biasotti, M., Galeazzi, M., Gatti, F., Gomes, M. R., Rocha, J., & Uprety, Y. (2013). Thermal properties of holmium-implanted gold films for a neutrino mass experiment with cryogenic microcalorimeters. Review of Scientific Instruments, 84(8), [083905]. https://doi.org/10.1063/1.4816640