Systematic investigation of background sources in neutron flux measurements with a proton-recoil silicon detector

作者：Marini P^*; Mathieu L; Acosta L; Aiche M; Czajkowski S; Jurado B; Tsekhanovich I

来源：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment , 2017, 841: 56-64.

DOI：10.1016/j.nima.2016.10.026

• Proton-recoil single-silicon detector
• Neutron flux measurement
• Sources of background in neutron flux measurements

Proton-recoil detectors (PRDs), based on the well known standard H(n,p) elastic scattering cross section, are the preferred instruments to perform precise quasi-absolute neutron flux measurements above 1 MeV. The limitations of using a single silicon detector as PRD at a continuous neutron beam facility are investigated, with the aim of extending such measurements to neutron energies below 1 MeV. This requires a systematic investigation of the background sources affecting the neutron flux measurement. Experiments have been carried out at the AIFIRA facility to identify these sources. A study on the role of the silicon detector thickness on the background is presented and an energy limit on the use of a single silicon detector to achieve a neutron flux precision better than 1% is given.

• 出版日期2017-1-1