γ production and neutron inelastic scattering cross sections for 76Ge

被引：12
|
作者：
Rouki, C. [1 ]
Domula, A. R. [2 ]
Drohe, J. C. [1 ]
Koning, A. J. [3 ]
Plompen, A. J. M. [1 ]
Zuber, K. [2 ]
机构：
[1] Commiss European Communities, Joint Res Ctr, Inst Reference Mat & Measurements, B-2440 Geel, Belgium
[2] Tech Univ Dresden, Inst Kern & Teilchenphys, D-01069 Dresden, Germany
[3] Nucl Res & Consultancy Grp NRG, NL-1755 ZG Petten, Netherlands
来源：
PHYSICAL REVIEW C | 2013年 / 88卷 / 05期
关键词：
DOUBLE-BETA DECAY; HIGH-RESOLUTION MEASUREMENT; FLUX; GELINA;
D O I：
10.1103/PhysRevC.88.054613
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 2040.7-keV gamma ray from the 69th excited state of Ge-76 was investigated in the interest of Ge-based double-beta-decay experiments like the Germanium Detector Array (GERDA) experiment. The predicted transition could interfere with valid 0 nu beta beta events at 2039.0 keV, creating false signals in large-volume Ge-76 enriched detectors. The measurement was performed with the Gamma Array for Inelastic Neutron Scattering (GAINS) at the Geel Electron Linear Accelerator (GELINA) white neutron source, using the (n,n'gamma) technique and focusing on the strongest gamma rays originating from the level. Upper limits obtained for the production cross section of the 2040.7-keV gamma ray showed no possible influence on GERDA data. Additional analysis of the data yielded high-resolution cross sections for the low-lying states of Ge-76 and related gamma rays, improving the accuracy and extending existing data for five transitions and five levels. The inelastic scattering cross section for Ge-76 was determined for incident neutron energies up to 2.23 MeV, significantly increasing the energy range for which experimental data are available. Comparisons with model calculations using the TALYS code are presented indicating that accounting for the recently established asymmetric rotor structure should lead to an improved description of the data.
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页数：12
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