A boron-coated ionization chamber for ultra-cold neutron detection

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• 作者：D.J. Salvat ; C.L. Morris ; Z. Wang ; E.R. Adamek ; J. Bacon ; K.P. Hickerson ; J. Hoagl ; A.T. Holley ; C.-Y. Liu ; M. Makela ; J. Ramsey ; A. Reid ; R. Rios ; A. Saunders ; S.K.L. Sjue ; B. VornDick ; A.R. Young
• 关键词：Ionization chamber ; Ultracold neutrons ; 3H replacement ; 10B
• 刊名：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
• 出版年：2012
• 出版时间：1 November, 2012
• 年：2012
• 卷：691
• 期：Complete
• 页码：109-112
• 全文大小：376 K

文摘

The design and performance of a boron-coated ionization chamber for the detection of ultra-cold neutrons (UCN) are presented. We detect UCN from the solid deuterium-based UCN source at the Los Alamos Neutron Science Center. Our results indicate comparable efficiency to ³He ionization chambers and proportional counters currently used at the UCN source. In addition, the ion chamber is used to detect thermal neutrons; a comparison of the thermal neutron and UCN pulse-height spectra indicates that UCN mostly capture near the layer surface.