Detection system for neutron β decay correlations in the UCNB and Nab experiments

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• 作者：L.J. Broussard^a ; ^b ; ^{broussardlj@ornl.gov} ; B.A. Zeck^a ; ^c ; E.R. Adamek^d ; S. Baeß ; ler^e ; N. Birge^f ; M. Blatnik^a ; ^g ; J.D. Bowman^b ; A.E. Brandt^a ; ^c ; M. Brown^h ; J. Burkhart^a ; N.B. Callahan^d ; S.M. Clayton^a ; C. Crawford^h ; C. Cude-Woods^c ; S. Currie^a ; E.B. Dees^c ; X. Dingⁱ ; N. Fomin^f ; E. Frlez^e ; J. Fry^e ; F.E. Gray^j ; S. Hasan^h ; K.P. Hickerson^k ; J. Hoagland^c ; A.T. Holley^l ; T.M. Ito^a ; A. Klein^a ; H. Li^e ; C.-Y. Liu^d ; M.F. Makela^a ; P.L. McGaughey^a ; J. Mirabal-Martinez^a ; C.L. Morris^a ; J.D. Ortiz^a ; ^m ; R.W. Pattie Jr.^a ; S.I. Penttilä ; ^b ; B. Plaster^h ; D. Počanić^e ; J.C. Ramsey^a ; A. Salas-Bacci^e ; D.J. Salvat^a ; ^d ; A. Saunders^a ; S.J. Seestrom^a ; S.K.L. Sjue^a ; A.P. Sprow^h ; Z. Tang^a ; R.B. Vogelaarⁱ ; B. Vorndick^c ; Z. Wang^a ; W. Wei^a
• 关键词：Silicon detector ; Neutron beta decay ; Ultracold neutrons
• 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：21 March 2017
• 年：2017
• 卷：849
• 期：Complete
• 页码：83-93
• 全文大小：2048 K
• 卷排序：849

文摘

We describe a detection system designed for precise measurements of angular correlations in neutron β decay. The system is based on thick, large area, highly segmented silicon detectors developed in collaboration with Micron Semiconductor, Ltd. The prototype system meets specifications for β electron detection with energy thresholds below 10 keV, energy resolution of ∼3 keV FWHM, and rise time of ∼50 ns with 19 of the 127 detector pixels instrumented. Using ultracold neutrons at the Los Alamos Neutron Science Center, we have demonstrated the coincident detection of β particles and recoil protons from neutron β decay. The fully instrumented detection system will be implemented in the UCNB and Nab experiments to determine the neutron β decay parameters B, a, and b.