Development of Decay Energy Spectroscopy for Radio Impurity Analysis

IF 1.7 3区物理与天体物理 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC IEEE Transactions on Applied Superconductivity Pub Date : 2024-12-12 DOI:10.1109/TASC.2024.3515965

J. S. Chung;O. Gileva;C. Ha;J. A Jeon;H. B. Kim;H. L. Kim;Y. H. Kim;H. J. Kim;M. B. Kim;D. H. Kwon;D. S. Leonard;D. Y. Lee;Y. C. Lee;H. S. Lim;K. R. Woo;J. Y. Yang

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引用次数: 0

Abstract

We present the development of a decay energy spectroscopy (DES) method for the analysis of radioactive impurities using magnetic microcalorimeters (MMCs). The DES system was designed to analyze radionuclides, such as

$^{226}$

Ra,

$^{228}$

Th, and their daughter nuclides, in materials like copper, commonly used in rare-event search experiments. We tested the DES system with a gold foil absorber measuring 20

$\,\times\, 20 \, \times$

0.05 mm

$^{3}$

, large enough to accommodate a significant drop of source solution. Using this large absorber and an MMC sensor, we conducted a long-term measurement over ten days of live time, requiring 11 ADR cooling cycles. The combined spectrum achieved an energy resolution of 45 keV FWHM, sufficient to identify most alpha and DES peaks of interest. Specific decay events from radionuclide contaminants in the absorber were identified. This experiment confirms the capability of the DES system to measure alpha decay chains of

$^{226}$

Ra and

$^{228}$

Th, offering a promising method for radio-impurity evaluation in ultra-low background experiments.

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来源期刊

IEEE Transactions on Applied Superconductivity 工程技术-工程：电子与电气

CiteScore

3.50

自引率

33.30%

发文量

650

审稿时长

2.3 months

期刊介绍： IEEE Transactions on Applied Superconductivity (TAS) contains articles on the applications of superconductivity and other relevant technology. Electronic applications include analog and digital circuits employing thin films and active devices such as Josephson junctions. Large scale applications include magnets for power applications such as motors and generators, for magnetic resonance, for accelerators, and cable applications such as power transmission.