Development of Metallic Magnetic Calorimeters for High Precision Measurements of Calorimetric 187Re and 163Ho Spectra
Development of Metallic Magnetic Calorimeters for High Precision Measurements of Calorimetric 187Re and 163Ho Spectra
复制标题
开发用于高精度测量 187Re 和 163Ho 光谱的金属磁性量热仪
DOI:
10.1007/s10909-012-0556-0
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发表时间:
2012
影响因子:
2
通讯作者:
Hengstler
中科院分区:
文献类型:
--
作者:
Ranitzsch;P. C.-O;Schäfer;Hengstler
The measurement of calorimetric spectra following atomic weak decays, beta (β) and electron capture (EC), of nuclides having a very lowQ-value, can provide an impressively high sensitivity to a non-vanishing neutrino mass. The achievable sensitivity in this kind of experiments is directly connected to the performance of the used detectors. In particular an energy resolution of a few eV and a pulse formation time well below 1 μs are required. Low temperature Metallic Magnetic Calorimeters (MMCs) for soft X-rays have already shown an energy resolution of 2.0 eV FWHM and a pulse rise-time of about 90 ns for fully micro-fabricated detectors. We present the use of MMCs for high precision measurements of calorimetric spectra following theβ-decay of187Re and the EC of163Ho. We show results obtained with detectors optimized for187Re and for163Ho experiments respectively. While the detectors equipped with superconducting Re absorbers have not yet reached the aimed performance, a first detector prototype with a Au absorber having implanted163Ho ions already shows excellent results. An energy resolution of 12 eV FWHM and a rise time of 90 ns were measured.
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