Measurement of Parity-Violating Gamma-ray Asymmetry in Compound Nuclei with Cold Neutrons
- Department of Physics, North Carolina State University, Raleigh, NC 27695 (United States)
- Los Alamos National Laboratory, Los Alamos, NM 87545 (United States)
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606 (United States)
- University of Michigan, Ann Arbor, MI 48104 (United States)
- Department of Physics, University of New Hampshire, Durham, NH 03824 (United States)
- Department of Physics University of California, Berkeley, CA 94720 (United States)
- National Institute of Standards and Technology, Gaithersburg, MD 20899 (United States)
- Department of Physics, University of Manitoba, Winnipeg, Manitoba R3T2N2 (Canada)
The NPDGamma collaboration has constructed and commissioned an apparatus on flight path 12 at LANSCE to measure with a high precision, 5x10-9, the small parity-violating gamma-ray asymmetry, A{gamma}, in polarized neutron capture on protons. This asymmetry can be determined unambiguously the weak pion-nucleon coupling constant. To study the hadronic weak interaction at low energy, the collaboration has used the NPDGamma apparatus to measure parity-violating gamma-ray asymmetries in compound nuclei with cold neutrons. Using the statistical model of compound nuclei and spectroscopic information of the target nuclei, we can set upper limit on the spreading width of the hadronic weak interaction for intermediate-mass nuclei. We describe the experiment and the preliminary results of measured gamma-ray asymmetries of Al, Sc, Ti, Mn, and Co.
- OSTI ID:
- 20798381
- Journal Information:
- AIP Conference Proceedings, Vol. 819, Issue 1; Conference: 12. international symposium on capture gamma-ray spectroscopy and related topics, Notre Dame, IN (United States), 4-9 Sep 2005; Other Information: DOI: 10.1063/1.2187838; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
Similar Records
Measurement of Parity-Violating y-ray Asymmetry in the Capture of Polarized Cold Neutrons on Protons
Measurement of parity-violating γ-ray asymmetry in the capture of polarized cold neutrons on protons