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

Here, we describe a detection system designed to precisely measure multiple correlations in neutron β decay. Furthermore, the system is based on thick, large area, highly segmented silicon detectors developed in collaboration with Micron Semiconductor, Ltd. The prototype system meets specifications of 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. We have demonstrated the coincident detection of β particles and recoil protons from neutron β decay, using ultracold neutrons at the Los Alamos Neutron Science Center, . 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.
Authors:
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  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. (ORNL), Oak Ridge, TN (United States)
  3. (United States)
  4. Indiana Univ., Bloomington, IN (United States)
  5. Univ. of Virginia, Charlottesville, VA (United States)
  6. Univ. of Tennessee, Knoxville, TN (United States)
  7. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  8. Univ. of Kentucky, Lexington, KY (United States)
  9. North Carolina State Univ., Raleigh, NC (United States)
  10. Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)
  11. Regis Univ., Denver, CO (United States)
  12. California Inst. of Technology (CalTech), Pasadena, CA (United States)
  13. Tennessee Technological Univ., Cookeville, TN (United States)
Publication Date:
Grant/Contract Number:
AC05-00OR22725; AC52-06NA25396; FG02-03ER41258; FG02-97ER41042; SC0008107; SC0014622; 20110043DR; 2017LANLEEDM
Type:
Accepted Manuscript
Journal Name:
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
Additional Journal Information:
Journal Volume: 849; Journal Issue: C; Journal ID: ISSN 0168-9002
Publisher:
Elsevier
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26); USDOE Office of Science (SC), Workforce Development for Teachers and Scientists (WDTS) (SC-27)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; silicon detector; neutron beta decay; ultracold neutrons
OSTI Identifier:
1344260
Alternate Identifier(s):
OSTI ID: 1416083