A new measurement of 174Hf alpha decay

IF 1.7 4区 物理与天体物理 Q2 PHYSICS, NUCLEAR
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引用次数: 0

Abstract

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: T1/2 = (3.80.9+1.7)×1016 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.
174Hf 阿尔法衰变的新测量方法
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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来源期刊
Nuclear Physics A
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.
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