Measurements of absolute gamma-ray energies using an ultra-high energy resolution magnetic microcalorimeter
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arXiv
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| Autori principali: | , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| _version_ | 1866908833218035712 |
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| author | Rodrigues, Matias Zahir, Mostafa L. Loidl, Martin Chambon, Lucille Drenne, Quentin Müller, Michael Kempf, Sebastian Nigron, Etienne Haddad, Ferid |
| author_facet | Rodrigues, Matias Zahir, Mostafa L. Loidl, Martin Chambon, Lucille Drenne, Quentin Müller, Michael Kempf, Sebastian Nigron, Etienne Haddad, Ferid |
| contents | We present new measurements of 27 gamma ray energies ranging from 14 keV to 136 keV, obtained using high-energy-resolution magnetic microcalorimeters for energy-dispersive spectrometry. The spectrometer has eight pixels and achieves an energy resolution between 15 and 30 eV across the entire energy range. It faces a cryogenic source sampler with four movable sources. Each source contains a mixture of radionuclides, including Yb-169 and Co-57 used to calibrate the spectrometer and correct its non-linearity. The gamma-ray energies, emitted through the decay of Co-57, Cd-109, Ba-133, Gd-153, Eu-154, Eu-155, Yb-169, Tm-170, Pb-210, Np-239, Am-241 and Am-243, have been reassessed. The lowest absolute uncertainty achieved is 0.13 eV at 105.3 keV, which corresponds to a relative uncertainty of 1.3 ppm. Of the 27 measured gamma rays, the uncertainties of 19 energies were improved with respect to the available literature: 10 by a factor of 5 and 4 by more than one order of magnitude. Good agreement is observed with energies obtained elsewhere by wavelength-dispersive spectrometry. This work significantly improves upon previously reported gamma energies obtained by energy-dispersive spectrometry using semiconductor detectors, thanks to the ultra-high energy resolution of magnetic microcalorimeters. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_12836 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Measurements of absolute gamma-ray energies using an ultra-high energy resolution magnetic microcalorimeter Rodrigues, Matias Zahir, Mostafa L. Loidl, Martin Chambon, Lucille Drenne, Quentin Müller, Michael Kempf, Sebastian Nigron, Etienne Haddad, Ferid Instrumentation and Detectors We present new measurements of 27 gamma ray energies ranging from 14 keV to 136 keV, obtained using high-energy-resolution magnetic microcalorimeters for energy-dispersive spectrometry. The spectrometer has eight pixels and achieves an energy resolution between 15 and 30 eV across the entire energy range. It faces a cryogenic source sampler with four movable sources. Each source contains a mixture of radionuclides, including Yb-169 and Co-57 used to calibrate the spectrometer and correct its non-linearity. The gamma-ray energies, emitted through the decay of Co-57, Cd-109, Ba-133, Gd-153, Eu-154, Eu-155, Yb-169, Tm-170, Pb-210, Np-239, Am-241 and Am-243, have been reassessed. The lowest absolute uncertainty achieved is 0.13 eV at 105.3 keV, which corresponds to a relative uncertainty of 1.3 ppm. Of the 27 measured gamma rays, the uncertainties of 19 energies were improved with respect to the available literature: 10 by a factor of 5 and 4 by more than one order of magnitude. Good agreement is observed with energies obtained elsewhere by wavelength-dispersive spectrometry. This work significantly improves upon previously reported gamma energies obtained by energy-dispersive spectrometry using semiconductor detectors, thanks to the ultra-high energy resolution of magnetic microcalorimeters. |
| title | Measurements of absolute gamma-ray energies using an ultra-high energy resolution magnetic microcalorimeter |
| topic | Instrumentation and Detectors |
| url | https://arxiv.org/abs/2602.12836 |