Your browser doesn't support javascript.
loading
Commissioning of the NPDGamma Detector Array: Counting Statistics in Current Mode Operation and Parity Violation in the Capture of Cold Neutrons on B 4 C and (27) Al.
Gericke, M T; Bowman, J D; Carlini, R D; Chupp, T E; Coulter, K P; Dabaghyan, M; Desai, D; Freedman, S J; Gentile, T R; Gillis, R C; Greene, G L; Hersman, F W; Ino, T; Ishimoto, S; Jones, G L; Lauss, B; Leuschner, M B; Losowski, B; Mahurin, R; Masuda, Y; Mitchell, G S; Muto, S; Nann, H; Page, S A; Penttila, S I; Ramsay, W D; Santra, S; Seo, P-N; Sharapov, E I; Smith, T B; Snow, W M; Wilburn, W S; Yuan, V; Zhu, H.
Afiliação
  • Gericke MT; Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
  • Bowman JD; Indiana University, Bloomington, Indiana 47405, USA.
  • Carlini RD; Thomas Jefferson National Accelerator Facility, Newport News VA 23606, USA.
  • Chupp TE; University of Michigan, Ann Arbor, MI 48104, USA.
  • Coulter KP; University of Michigan, Ann Arbor, MI 48104, USA.
  • Dabaghyan M; University of New Hampshire, Durham, NH 03824, USA.
  • Desai D; University of Tennessee, Knoxville, TN 37996, USA.
  • Freedman SJ; University of California, Berkeley, CA 94720-7300, USA.
  • Gentile TR; National Institute of Standards and Technology, Gaithersburg, MD 20899-0001, USA.
  • Gillis RC; University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada.
  • Greene GL; Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.
  • Hersman FW; University of New Hampshire, Durham, NH 03824, USA.
  • Ino T; High Energy Accelerator Research Organization (KEK), Tukubash-shi, 305-0801, Japan.
  • Ishimoto S; High Energy Accelerator Research Organization (KEK), Tukubash-shi, 305-0801, Japan.
  • Jones GL; Hamilton College, Clinton, NY 13323, USA.
  • Lauss B; University of California, Berkeley, CA 94720-7300, USA.
  • Leuschner MB; Indiana University, Bloomington, Indiana 47405, USA.
  • Losowski B; Indiana University, Bloomington, Indiana 47405, USA.
  • Mahurin R; University of Tennessee, Knoxville, TN 37996, USA.
  • Masuda Y; High Energy Accelerator Research Organization (KEK), Tukubash-shi, 305-0801, Japan.
  • Mitchell GS; Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
  • Muto S; High Energy Accelerator Research Organization (KEK), Tukubash-shi, 305-0801, Japan.
  • Nann H; Indiana University, Bloomington, Indiana 47405, USA.
  • Page SA; University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada.
  • Penttila SI; Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
  • Ramsay WD; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada.
  • Santra S; Indiana University, Bloomington, Indiana 47405, USA.
  • Seo PN; Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
  • Sharapov EI; Joint Institute for Nuclear Research, Dubna, Russia.
  • Smith TB; University of Dayton, Dayton, OH 45469, USA.
  • Snow WM; Indiana University, Bloomington, Indiana 47405, USA.
  • Wilburn WS; Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
  • Yuan V; Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
  • Zhu H; University of New Hampshire, Durham, NH 03824, USA.
J Res Natl Inst Stand Technol ; 110(3): 215-9, 2005.
Article em En | MEDLINE | ID: mdl-27308124
ABSTRACT
The NPDGamma γ-ray detector has been built to measure, with high accuracy, the size of the small parity-violating asymmetry in the angular distribution of gamma rays from the capture of polarized cold neutrons by protons. The high cold neutron flux at the Los Alamos Neutron Scattering Center (LANSCE) spallation neutron source and control of systematic errors require the use of current mode detection with vacuum photodiodes and low-noise solid-state preamplifiers. We show that the detector array operates at counting statistics and that the asymmetries due to B4C and (27)Al are zero to with- in 2 × 10(-6) and 7 × 10(-7), respectively. Boron and aluminum are used throughout the experiment. The results presented here are preliminary.
Palavras-chave
Texto completo
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2005 Tipo de documento: Article
Texto completo
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2005 Tipo de documento: Article