DOUBLE BETA DECAY OF Nd-150 TO THE FIRST EXCITED 0(+) LEVEL OF Sm-150: PRELIMINARY RESULTS

被引：9

作者：

Barabash, A. S. ^{[1
]}

Belli, P. ^{[2
,3
]}

Bernabei, R. ^{[2
,3
]}

Boiko, R. S. ^{[4
,5
]}

Cappella, F. ^{[6
]}

Caracciolo, V ^{[7
]}

Cerulli, R. ^{[2
,3
]}

Danevich, F. A. ^{[4
]}

Di Marco, A. ^{[2
,3
]}

Incicchitti, A. ^{[6
,8
]}

Kasperovych, D., V ^{[4
]}

Kobychev, R., V ^{[4
]}

Kobychev, V. V. ^{[4
]}

Konovalov, S., I ^{[1
]}

Laubenstein, M. ^{[7
]}

Poda, D., V ^{[4
,9
]}

Polischuk, O. G. ^{[4
]}

Tretyak, V., I ^{[4
]}

Umatov, V., I ^{[1
]}

机构：

[1] Inst Theoret & Expt Phys, Kurchatov Inst, Natl Res Ctr, Moscow, Russia

[2] Ist Nazl Fis Nucl, Sez Roma Tor Vergata, Rome, Italy

[3] Univ Roma Tor Vergata, Dipartimento Fis, Rome, Italy

[4] Natl Acad Sci Ukraine, Inst Nucl Res, Kiev, Ukraine

[5] Natl Univ Life & Environm Sci Ukraine, Kiev, Ukraine

[6] Ist Nazl Fis Nucl, Sez Roma, Rome, Italy

[7] Ist Nazl Fis Nucl, Lab Nazl Gran Sasso, Assergi, AQ, Italy

[8] Univ Roma La Sapienza, Dipartimento Fis, Rome, Italy

[9] Univ Paris Saclay, Univ Paris Sud, IN2P3, CNRS,CSNSM, Orsay, France

来源：

NUCLEAR PHYSICS AND ATOMIC ENERGY | 2018年 / 19卷 / 02期

关键词：

double beta decay; Nd-150; low counting experiment;

D O I：

10.15407/jnpae2018.02.095

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：

The double beta decay of Nd-150 to the first excited 0(+) level of Sm-150 (E-exc = 740.5 keV) has been investigated with the help of the ultra-low-background setup consisting of four HP Ge (high-purity germanium) detectors (similar or equal to 225 cm(3) volume each one) at the Gran Sasso underground laboratory of INFN (Italy). A highly purified 2.381-kg sample of neodymium oxide (Nd2O3) was used as a source of gamma quanta expected in the decays. Gamma quanta with energies 334.0 keV and 406.5 keV emitted after deexcitation of the 0(1)(+) 740.5 keV level of Sm-150 are observed in the coincidence spectra accumulated over 16375 h. The half-life relatively to the two neutrino double beta decay Nd-150 -> Sm-150(0(1)(+)) is measured as T-1/2 = [4.7(-1.9)(+4.1)(stat) +/- 0.5(syst)].10(19) y, in agreement with results of previous experiments.

引用

页码：95 / 102

页数：8

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