Maximum-likelihood analysis and goodness-of-fit estimation in low count-rate experiments:: 85Kr β activity in the test facility of the Borexino detector and double-beta decay of 76Ge in the Heidelberg-Moscow experiment

被引：4

作者：

Ianni, A ^{[1
]}

机构：

[1] Ist Nazl Fis Nucl, Lab Nazl Gran Sasso, I-67010 Assergi, AQ, Italy

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2004年 / 516卷 / 01期

关键词：

maximum-likelihood inference; goodness-of-fit; low-level counting;

D O I：

10.1016/j.nima.2003.07.040

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Statistical methods for low count-rate experiments are reviewed and applied to two samples of experimental data. In one case the beta activity of Kr-85 in the test facility of the Borexino detector is determined. In another case a data sample from the Heidelberg-Moscow experiment used to claim the discovery of the neutrinoless double-beta decay of Ge-76 is analyzed. Exploiting a Bayesian technique a conservative upper limit on the half-life of the 0v2beta decay of Ge-76 is found at T-1/2(0v) greater than or equal to 1.2 x 10(25) yr (90% CL) in the window (2000-2080) keV. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：184 / 192

页数：9

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