Search for α decay of naturally occurring Hf-nuclides using a Cs2HfCl6 scintillator

被引：18

作者：

Caracciolo, V ^{[1
,2
,3
]}

Nagorny, S. S. ^{[4
]}

Belli, P. ^{[1
,2
]}

Bernabei, R. ^{[1
,2
]}

Cappella, F. ^{[5
,6
]}

Cerulli, R. ^{[1
,2
]}

Incicchitti, A. ^{[5
,6
]}

Laubenstein, M. ^{[3
]}

Merlo, V ^{[1
,2
]}

Nisi, S. ^{[3
]}

Wang, P. ^{[7
]}

机构：

[1] Ist Nazl Fis Nucl, Sez Roma Tor Vergata, I-00133 Rome, Italy

[2] Univ Roma Tor Vergata, Dipartimento Fis, I-00133 Rome, Italy

[3] Ist Nazl Fis Nucl, Lab Nazl Gran Sasso, I-67100 Assergi, AQ, Italy

[4] Queens Univ, Dept Phys, Kingston, ON K7L 3N6, Canada

[5] Ist Nazl Fis Nucl, Sez Roma, I-00185 Rome, Italy

[6] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy

[7] Queens Univ, Dept Chem, Kingston, ON K7L 3N6, Canada

来源：

NUCLEAR PHYSICS A | 2020年 / 1002卷

关键词：

Rare alpha decay; Hf-174; Crystal scintillator; Cs2HfCl6; Low background experiment; Hafnium; CRYSTAL; CONTAMINATION;

D O I：

10.1016/j.nuclphysa.2020.121941

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Residual radioactive contaminants of a caesium hafnium chloride (Cs2HfCl6) crystal scintillator have been measured in a low background setup at the Gran Sasso National Laboratory of the INFN, Italy. The total alpha activity of the detector is at the level of 7.8(3) mBq/kg. The results of direct studies of the alpha decay of naturally occurring Hf isotopes that have been performed using the "source=detector" approach are presented. In 2848h of data taking, the alpha decay of Hf-174 was observed with T-1/2 = (7.0 +/- 1.2) x 10(16) y. Crown Copyright (C) 2020 Published by Elsevier B.V. All rights reserved.

引用

页数：17

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