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

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• 作者：P. Marini^a ; ^{marini@cenbg.in2p3.fr" class="auth_mail" title="E-mail the corresponding author} ; L. Mathieu^a ; L. Acosta^b ; M. Aï ; che^a ; S. Czajkowski^a ; B. Jurado^a ; I. Tsekhanovich^a
• 关键词：Proton-recoil single-silicon detector ; Neutron flux measurement ; Sources of background in neutron flux measurements
• 刊名：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
• 出版年：2017
• 出版时间：1 January 2017
• 年：2017
• 卷：841
• 期：Complete
• 页码：56-64
• 全文大小：1004 K

文摘

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.