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Instrumentation for correlated prompt n – γ emission studies in coincidence with fission fragments

Journal Article · · Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
 [1];  [2];  [3];  [2];  [2];  [2];  [4];  [5];  [4];  [6];  [6];  [3];  [2]
  1. University of Michigan, Ann Arbor, MI (United States); MTV/University of Michigan, NERS
  2. Argonne National Laboratory (ANL), Argonne, IL (United States)
  3. University of Michigan, Ann Arbor, MI (United States)
  4. Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
  5. Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Colorado School of Mines, Golden, CO (United States)
  6. Oregon State University, Corvallis OR (United States)
+ Show Author Affiliations
Recent theoretical and experimental results have brought renewed interest and focus on the topic of fission fragment angular momentum. Measurements of neutrons and rays in coincidence with fission fragments remain the most valuable tool in the exploration of fission physics. To achieve these scientific goals, we have developed a system that combines a state-of-the-art fission fragment detector and n – γ radiation detectors. A new twin Frisch-gridded ionization chamber has been designed and constructed for use with a spontaneous fission source and an array of forty trans-stilbene organic scintillators (FS-3) at Argonne National Laboratory. The new ionization chamber design we present in this work aims at minimizing particle attenuation in the chamber walls, and provides a compact apparatus that can be fit inside existing experimental systems. The ionization chamber is capable of measuring fission fragment masses and kinetic energies, whereas the FS-3 provides neutron and γ-ray multiplicities and spectra. Here, the details of both detector assemblies are presented along with the first experimental results of this setup. Planned event-by-event analysis and future experiments are briefly discussed.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States); Oregon State University, Corvallis, OR (United States); Univ. of Michigan, Ann Arbor, MI (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation; USDOE Office of Nuclear Energy (NE); USDOE Office of Science (SC), Nuclear Physics (NP)
Grant/Contract Number:
AC02-06CH11357; NA0003920; NA0004072
OSTI ID:
1989471
Alternate ID(s):
OSTI ID: 2350573
OSTI ID: 2473095
Journal Information:
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment, Journal Name: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment Vol. 1048; ISSN 0168-9002
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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