Parity violation in neutron resonances in <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow></mrow><mrow><mn>115</mn></mrow></msup></mrow><mi mathvariant="normal">In</mi></math></span>

S. L. Stephenson; J. D. Bowman; F. Corvi; B. E. Crawford; P. P. J. Delheij; C. M. Frankle; M. Iinuma; J. N. Knudson; L. Y. Lowie; 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; Y.-F. Yen; V. W. Yuan; L. Zanini

doi:10.1103/PhysRevC.61.045501

Parity violation in neutron resonances in $^{115} In$

S. L. Stephenson, J. D. Bowman, F. Corvi, B. E. Crawford, P. P. J. Delheij, C. M. Frankle, M. Iinuma, J. N. Knudson, L. Y. Lowie, 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, Y.-F. Yen, V. W. Yuan, and L. Zanini

Phys. Rev. C 61, 045501 – Published 6 March 2000

Abstract

Parity nonconservation (PNC) was studied in p-wave resonances in indium by measuring the helicity dependence of the neutron total cross section in the neutron energy range 6.0–316 eV with the time-of-flight method at LANSCE. A total of 36 p-wave neutron resonances were studied in $^{115} In,$ and statistically significant asymmetries were observed for nine cases. An analysis treating the PNC matrix elements as random variables yields a weak matrix element of ${M = (0.67}_{- 0.12}^{+ 0.16}) meV$ and a weak spreading width of $Γ_{w} {= (1.30}_{- 0.43}^{+ 0.76}) \times 10^{- 7} eV .$

Received 28 September 1999

DOI:https://doi.org/10.1103/PhysRevC.61.045501

Authors & Affiliations

S. L. Stephenson^1,*, J. D. Bowman², F. Corvi³, B. E. Crawford^4,*, P. P. J. Delheij⁵, C. M. Frankle², M. Iinuma^6,†, J. N. Knudson², L. Y. Lowie^1,‡, A. Masaike^6,§, Y. Masuda⁷, Y. Matsuda^6,∥, G. E. Mitchell¹, S. I. Penttilä², H. Postma⁸, N. R. Roberson⁴, S. J. Seestrom², E. I. Sharapov⁹, H. M. Shimizu^7,¶, Y.-F. Yen^2,**, V. W. Yuan², and L. Zanini^3,††

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
⁶Physics Department, Kyoto University, Kyoto 606-01, Japan
⁷National Laboratory for High Energy Physics, 1-1, Oho, Tsukuba 305, Japan
⁸Delft University of Technology, IRI/ISO, 2629 JB, Delft, the Netherlands
⁹Joint Institute for Nuclear Research, 141980 Dubna, Russia

^*Present address: Gettysburg College, Gettysburg, PA 17325.
^†Present address: Hiroshima University, Hiroshima-Ken 739-8526, Japan.
^‡Present address: McKinsey and Company, Atlanta, GA 30303.
^§Present address: Fukui University of Technology, 3-6-1 Gakuen, Fukui-shi, 910-8505, Japan.
^∥Present address: Institute of Physical and Chemical Research (RIKEN), 2-1 Hirosawa, Wako, Saitama, 351-8526, Japan.
^¶Present address: Institute of Physical and Chemical Research (RIKEN), 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan.
^**Present address: Wake Forest University School of Medicine, Winston-Salem, NC 27157.
^††Present address: Los Alamos National Laboratory, Los Alamos, New Mexico 87545.

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Vol. 61, Iss. 4 — April 2000

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