A separation method of 0ν- and 2ν-events in double beta decay experiments with DCBA

被引：51

作者：

Ishihara, N ^{[1
]}

Inagaki, T

Ohama, T

Omata, K

Takeda, S

Yamada, Y

Emura, T

Itoh, R

Kato, Y

Sakamoto, Y

Shimada, K

Tamura, N

Kitamura, S

机构：

[1] KEK, High Energy Accelerator Res Org, Tsukuba, Ibaraki 3050801, Japan

[2] Tokyo Univ Agr & Technol, Koganei, Tokyo 1848588, Japan

[3] Niigata Univ, Grad Sch Sci & Technol, Niigata 9502181, Japan

[4] Tokyo Metropolitan Univ Hlth Sci, Tokyo 1168551, Japan

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2000年 / 443卷 / 01期

关键词：

momentum analyzer; drift chamber; vertex detection;

D O I：

10.1016/S0168-9002(99)01003-7

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

A detector called Drift Chamber Beta-ray Analyzer (DCBA) will provide momentum information of each beta-ray in double beta decay. The DCBA is expected to have good capabilities for particle identification, detection efficiency, background elimination and decay-source integration. Under the assumption of mass mechanism dominance in neutrinoless double beta decay, a simulation study shows that a combination method using both sum and single-energy distributions of double beta decay events can separate 0 nu- and 2 nu-events down to 0.05 eV of the effective neutrino mass with the help of a calculated nuclear matrix element, even though the DCBA has relatively poor energy resolution. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：101 / 107

页数：7

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