Parity violation in neutron resonances in 107,109Ag

L. Y. Lowie, J. D. Bowman, F. Corvi, B. E. Crawford, P. P. J. Delheij, C. M. Frankle, M. Iinuma, J. N. Knudson, A. Masaike, Y. Masuda, Y. Matsuda, G. E. Mitchell, S. I. Penttilä, H. Postma, N. R. Roberson, S. J. Seestrom, E. I. Sharapov, H. M. Shimizu, S. L. Stephenson, Y.-F. Yen, V. W. Yuan, and L. Zanini
Phys. Rev. C 59, 1119 – Published 1 February 1999
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Abstract

Parity nonconservation (PNC) was studied in p-wave resonances in Ag by measuring the helicity dependence of the neutron total cross section. Transmission measurements on natural Ag were performed in the energy range 32 to 422 eV with the time-of-flight method at the Manuel Lujan Neutron Scattering Center at Los Alamos National Laboratory. A total of 15 p-wave neutron resonances were studied in 107Ag and nine p-wave resonances in 109Ag. Statistically significant asymmetries were observed for eight resonances in 107Ag and for four resonances in 109Ag. An analysis treating the PNC matrix elements as random variables yields a weak spreading width of Γw=(2.671.21+2.65)×107eV for 107Ag and Γw=(1.300.74+2.49)×107eV for 109Ag.

  • Received 19 August 1998

DOI:https://doi.org/10.1103/PhysRevC.59.1119

©1999 American Physical Society

Authors & Affiliations

L. Y. Lowie1,*, J. D. Bowman2, F. Corvi3, B. E. Crawford4,†, P. P. J. Delheij5, C. M. Frankle2, M. Iinuma6,‡, J. N. Knudson2, A. Masaike6, Y. Masuda7, Y. Matsuda6,§, G. E. Mitchell1, S. I. Penttilä2, H. Postma8, N. R. Roberson4, S. J. Seestrom2, E. I. Sharapov9, H. M. Shimizu6,§, S. L. Stephenson1,∥, Y.-F. Yen2,¶, V. W. Yuan2, and L. Zanini3

  • 1North Carolina State University, Raleigh, North Carolina 27695-8202Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708-0308
  • 2Los Alamos National Laboratory, Los Alamos, New Mexico 87545
  • 3Institute for Reference Materials and Measurements, Geel, Belgium
  • 4Duke University, Durham, North Carolina 27708Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708-0308
  • 5TRIUMF, Vancouver, British Columbia, Canada V6T 2A3
  • 6Department of Physics, Kyoto University, Kyoto 606-01, Japan
  • 7National Laboratory for High Energy Physics, 1-1, Oho, Tsukuba 305, Japan
  • 8Delft University of Technology, Delft, 2600 GA, The Netherlands
  • 9Joint Institute for Nuclear Research, 141980 Dubna, Russia

  • *Present address: McKinsey and Company, Atlanta, GA 30303.
  • Present address: North Carolina State University, Raleigh, NC 27695-8202 and Gettysburg College, Gettysburg, PA 17325.
  • Present address: Hiroshima University, Hiroshima-Ken 739-8526, Japan.
  • §Present address: Institute of Physical and Chemical Research (RIKEN), Saitama, 351-0198, Japan.
  • Present address: Gettysburg College, Gettysburg, PA 17325.
  • Present address: Wake Forest University School of Medicine, Winston-Salem, NC 27157.

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Vol. 59, Iss. 2 — February 1999

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