Method for measuring multiple scattering corrections between liquid scintillators

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• 作者：J.M. Verbeke ; ^{verbeke2@llnl.gov" class="auth_mail" title="E-mail the corresponding author} ; A.M. Glenn ^{glenn22@llnl.gov" class="auth_mail" title="E-mail the corresponding author} ; G.J. Keefer ^{keefer1@llnl.gov" class="auth_mail" title="E-mail the corresponding author} ; R.E. Wurtz ^{wurtz1@llnl.gov" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Liquid scintillators ; Crosstalk ; Multiple scattering ; Neutron multiplicity ; Neutron correlation ; Fissile materials
• 刊名：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
• 出版年：2016
• 出版时间：21 July 2016
• 年：2016
• 卷：825
• 期：Complete
• 页码：69-77
• 全文大小：1655 K

文摘

A time-of-flight method is proposed to experimentally quantify the fractions of neutrons scattering between scintillators. An array of scintillators is characterized in terms of crosstalk with this method by measuring a californium source, for different neutron energy thresholds. The spectral information recorded by the scintillators can be used to estimate the fractions of neutrons multiple scattering. With the help of a correction to Feynman's point model theory to account for multiple scattering, these fractions can in turn improve the mass reconstruction of fissile materials under investigation.