174Hf 阿尔法衰变的新测量方法

IF 1.7 4区物理与天体物理 Q2 PHYSICS, NUCLEAR

Nuclear Physics A Pub Date : 2024-10-28 DOI:10.1016/j.nuclphysa.2024.122976

P. Belli , R. Bernabei , F. Cappella , V. Caracciolo , R. Cerulli , A. Incicchitti , M. Laubenstein , A. Leoncini , V. Merlo , S.S. Nagorny , V.V. Nahorna , S. Nisi , P. Wang

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引用次数: 0

摘要

意大利国家核研究所的格兰萨索国家实验室（LNGS）在地下深处对 174Hf α衰变到 170Yb 基态进行了新的测量。实验数据是用 16.87 克 Cs2HfCl6 单晶体在 97.7 天内积累的。得出了 174Hf α 衰变的新半衰期值：T1/2=（3.8-0.9+1.7）×1016 年。该晶体的内部α总活度为 18.6(4) mBq/kg，还需要进一步提高，特别是在 147Sm 污染（0.25 mBq/kg）方面，以达到更高的实验灵敏度。

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A new measurement of 174Hf alpha decay

A new measurement of ¹⁷⁴Hf alpha decay to the ground state of ¹⁷⁰Yb was performed deep underground at the Gran Sasso National Laboratory (LNGS) of the INFN (Italy). The experimental data were accumulated over 97.7 days with a 16.87 g Cs₂HfCl₆ single crystal. A new half-life value of ¹⁷⁴Hf α decay: T_1/2 =

({3.8}_{- 0.9}^{+ 1.7}) \times 10^{16}

yr, was evaluated. The total internal α activity of the crystal is 18.6(4) mBq/kg, and should be further improved, especially in terms of ¹⁴⁷Sm contamination (0.25 mBq/kg), in order to achieve a higher experimental sensitivity.

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来源期刊

Nuclear Physics A 物理-物理：核物理

CiteScore

3.60

自引率

7.10%

发文量

113

审稿时长

61 days

期刊介绍： Nuclear Physics A focuses on the domain of nuclear and hadronic physics and includes the following subsections: Nuclear Structure and Dynamics; Intermediate and High Energy Heavy Ion Physics; Hadronic Physics; Electromagnetic and Weak Interactions; Nuclear Astrophysics. The emphasis is on original research papers. A number of carefully selected and reviewed conference proceedings are published as an integral part of the journal.