Measurement of the parity-odd angular distribution of gamma rays from polarized neutron capture on Cl-35
Por:
Fomin, N., Alarcon, R., Alonzi, L., Askanazi, E., Baessler, S., Balascuta, S., Barron-Palos, L., Barzilov, A., Blyth, D., Bowman, J. D., Birge, N., Calarco, J. R., Chupp, T. E., Cianciolo, V, Coppola, C. E., Crawford, C. B., Craycraft, K., Evans, D., Fieseler, C., Frlez, E., Fry, J., Garishvili, I, Gericke, M. T. W., Gillis, R. C., Grammer, K. B., Greene, G. L., Hall, J., Hamblen, J., Hayes, C., Iverson, E. B., Kabir, M. L., Kucuker, S., Lauss, B., Mahurin, R., McCrea, M., Maldonado-Velazquez, M., Masuda, Y., Mei, J., Milburn, R., Mueller, P. E., Musgrave, M., Nann, H., Novikov, I, Parsons, D., Penttila, I, S., Pocanic, D., Ramirez-Morales, A., Root, M., Salas-Bacci, A., Santra, S., Schroeder, S., Scott, E., Seo, P-N, Sharapov, I, E., Simmons, F., Snow, W. M., Sprow, A., Stewart, J., Tang, E., Tang, Z., Tong, X., Turkoglu, D. J., Whitehead, R., Wilburn, W. S.
Publicada:
27 jul 2022
Categoría:
Nuclear and high energy physics
Resumen:
We report a measurement of two energy-weighted gamma cascade angular
distributions from polarized slow neutron capture on the Cl-35 nucleus,
one parity-odd correlation proportional to (s) over right arrown.(k)
over right arrow (gamma) and one parity-even correlation proportional to
(s) over right arrown.(k) over right arrown x (k) over right arrow
(gamma). A parity-violating asymmetry can appear in this reaction due to
the weak nucleon-nucleon interaction, which mixes opposite parity S-and
P-wave levels in the excited compound Cl-36 nucleus formed upon slow
neutron capture. If parity-violating (PV) and parity-conserving (PC)
terms both exist, the measured differential cross section can be related
to them via d sigma sigma/d Omega proportional to 1 +A(gamma,PV) cos
theta +A(gamma,PC) sin theta. The PV and PC asymmetries for
energy-weighted gamma cascade angular distributions for polarized slow
neutron capture on Cl-35 averaged over the neutron energies from
2.27-9.53 meV were measured to be A(gamma,PV) = (-23.9 +/- 0.7) x 10(-6)
and A(gamma,PC) = (0.1 +/- 0.7) x 10(-6). These results are consistent
with previous experimental results. Systematic errors were quantified
and shown to be small compared to the statistical error. These
asymmetries in the angular distributions of the gamma rays emitted from
the capture of polarized neutrons in Cl-35 were used to verify the
operation and data analysis procedures for the NPDGamma experiment,
which measured the parity-odd asymmetry in the angular distribution of
gamma s from polarized slow neutron capture on protons.
Filiaciones:
Fomin, N.:
(Corresponding Author), Univ Tennessee, Knoxville, TN 37996 USA
(Corresponding Author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA
Univ Tennessee, Knoxville, TN 37996 USA
Los Alamos Natl Lab, Los Alamos, NM 87545 USA
Alarcon, R.:
Arizona State Univ, Tempe, AZ 85287 USA
Alonzi, L.:
Univ Virginia, Charlottesville, VA 22904 USA
Askanazi, E.:
Univ Virginia, Charlottesville, VA 22904 USA
Baessler, S.:
Univ Virginia, Charlottesville, VA 22904 USA
Penttila, S
Balascuta, S.:
Horia Hulubei Natl Inst Phys & Nucl Engn, Magurele 077125, Romania
Barron-Palos, L.:
Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20-364, Mexico City 01000, DF, Mexico
Barzilov, A.:
Univ Nevada, Las Vegas, NV 89154 USA
Blyth, D.:
Argonne Natl Lab, High Energy Phys Div, Argonne, IL 60439 USA
Bowman, J. D.:
Penttila, S
Birge, N.:
Univ Tennessee, Knoxville, TN 37996 USA
Calarco, J. R.:
Univ New Hampshire, Durham, NH 03824 USA
Chupp, T. E.:
Univ Michigan, Ann Arbor, MI 48109 USA
Cianciolo, V:
Penttila, S
Coppola, C. E.:
Univ Tennessee, Knoxville, TN 37996 USA
Crawford, C. B.:
Univ Kentucky, Lexington, KY 40506 USA
Craycraft, K.:
Univ Virginia, Charlottesville, VA 22904 USA
Indiana Univ, Bloomington, IN 47405 USA
Evans, D.:
Univ Virginia, Charlottesville, VA 22904 USA
Indiana Univ, Bloomington, IN 47405 USA
Fieseler, C.:
Univ Kentucky, Lexington, KY 40506 USA
Frlez, E.:
Univ Virginia, Charlottesville, VA 22904 USA
Fry, J.:
Univ Virginia, Charlottesville, VA 22904 USA
Indiana Univ, Bloomington, IN 47405 USA
Eastern Kentucky Univ, Richmond, KY 40475 USA
Garishvili, I:
Univ Tennessee, Knoxville, TN 37996 USA
Penttila, S
Gericke, M. T. W.:
Univ Manitoba, Winnipeg, MB R3T 2N2, Canada
Gillis, R. C.:
Penttila, S
Indiana Univ, Bloomington, IN 47405 USA
Grammer, K. B.:
Univ Tennessee, Knoxville, TN 37996 USA
Penttila, S
Greene, G. L.:
Univ Tennessee, Knoxville, TN 37996 USA
Penttila, S
Hall, J.:
Univ Virginia, Charlottesville, VA 22904 USA
Hamblen, J.:
Univ Tennessee, Chattanooga, TN 37403 USA
Hayes, C.:
Univ Tennessee, Knoxville, TN 37996 USA
North Carolina State Univ, Phys Dept, Raleigh, NC 27695 USA
Iverson, E. B.:
Penttila, S
Kabir, M. L.:
Univ Kentucky, Lexington, KY 40506 USA
Mississippi State Univ, Mississippi State, MS 39759 USA
Kucuker, S.:
Univ Tennessee, Knoxville, TN 37996 USA
Northwestern Univ, Feinberg Sch Med, Chicago, IL 60611 USA
Lauss, B.:
Paul Scherrer Inst, CH-5232 Villigen, Switzerland
Mahurin, R.:
Middle Tennessee State Univ, Murfreesboro, TN 37132 USA
McCrea, M.:
Univ Kentucky, Lexington, KY 40506 USA
Univ Manitoba, Winnipeg, MB R3T 2N2, Canada
Maldonado-Velazquez, M.:
Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20-364, Mexico City 01000, DF, Mexico
Masuda, Y.:
High Energy Accelerator Res Org KEK, Tsukuba 3050801, Japan
Mei, J.:
Indiana Univ, Bloomington, IN 47405 USA
Milburn, R.:
Univ Kentucky, Lexington, KY 40506 USA
Mueller, P. E.:
Penttila, S
Musgrave, M.:
MIT, 77 Massachusetts Ave, Cambridge, MA 02139 USA
Nann, H.:
Indiana Univ, Bloomington, IN 47405 USA
Novikov, I:
Western Kentucky Univ, Bowling Green, KY 42101 USA
Parsons, D.:
Univ Tennessee, Chattanooga, TN 37403 USA
Pocanic, D.:
Univ Virginia, Charlottesville, VA 22904 USA
Ramirez-Morales, A.:
Univ Nacl Autonoma Mexico, Inst Fis, Apartado Postal 20-364, Mexico City 01000, DF, Mexico
Root, M.:
Univ Virginia, Charlottesville, VA 22904 USA
Salas-Bacci, A.:
Univ Virginia, Charlottesville, VA 22904 USA
Santra, S.:
Bhabha Atom Res Ctr, Mumbai 400085, Maharashtra, India
Schroeder, S.:
Univ Virginia, Charlottesville, VA 22904 USA
Saarland Univ, Inst Expt Ophthalmol, Kirrberger Str 100,Bldg 22, D-66424 Homburg, Germany
Scott, E.:
Univ Tennessee, Knoxville, TN 37996 USA
Seo, P-N:
Univ Virginia, Charlottesville, VA 22904 USA
Triangle Univ Nucl Lab, Durham, NC 27708 USA
Simmons, F.:
Univ Kentucky, Lexington, KY 40506 USA
Snow, W. M.:
Indiana Univ, Bloomington, IN 47405 USA
Sprow, A.:
Univ Kentucky, Lexington, KY 40506 USA
Stewart, J.:
Univ Tennessee, Chattanooga, TN 37403 USA
Tang, E.:
Univ Kentucky, Lexington, KY 40506 USA
Tang, Z.:
Los Alamos Natl Lab, Los Alamos, NM 87545 USA
Indiana Univ, Bloomington, IN 47405 USA
Tong, X.:
I , Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA
Turkoglu, D. J.:
NIST, Gaithersburg, MD 20899 USA
Whitehead, R.:
Univ Tennessee, Knoxville, TN 37996 USA
Wilburn, W. S.:
Los Alamos Natl Lab, Los Alamos, NM 87545 USA
Green Submitted, All Open Access; Green
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