Monte Carlo Comparison of Alternatives to 3He Thermal Neutron Detectors for Logging Applications

被引：0
作者：
Bala, A. [1 ,2 ]
Jenkins, D. [1 ]
Brown, J. R. [1 ]
Bordes, J. [1 ]
Joshi, P. [1 ]
Worthington, P. [3 ]
机构：
[1] Univ York, Dept Phys, York YO10 4DD, N Yorkshire, England
[2] Usmanu Danfodiyo Univ, Dept Phys, PMB 2346, Sokoto, Sokoto, Nigeria
[3] Robertson Geologging Co, York Rd, Deganwy LL31 9PX, Conwy, Wales
来源：
2019 IEEE NUCLEAR SCIENCE SYMPOSIUM AND MEDICAL IMAGING CONFERENCE (NSS/MIC) | 2019年
关键词：
BORON-COATED STRAWS;
D O I：
暂无
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
The survey of oil and gas often employs two radiation-based measurements in a rock formation: the electron density with gamma-ray density tools; and the hydrogen content with neutron porosity tools. The former tools are composed of a gamma-ray source and a gamma-rays detector, such as NaI(Tl). The latter tools comprise a neutron source and a thermal neutron (25 meV) detector, such as He-3 tube. However, gamma-ray density and neutron porosity tools must be used conjointly. Additionally, the demand for neutron detection technology is increasing while the supply of He-3 gas is extremely scarce. These issues have led to the development of alternative neutron detection technology based on B-10 and Li-6. Here, the first aim was to review detectors belonging to (10) B and Li-6 families. The second aim was to compare He-3 tube and some B-10 and Li-6 detectors selected from the review. Their counting rates were calculated with Geant4 Monte Carlo simulations. In the tested configurations, it was shown that both B-10 and Li-6 families present counting rates similar to He-3 tubes. Furthermore, Li-6 detectors are capable of measuring both electron density and hydrogen content, eliminating the need for two separate tools.
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