Observation of a large parity nonconserving analyzing power in Xe

J. J. Szymanski; W. M. Snow; J. D. Bowman; B. Cain; B. E. Crawford; P. P. J. Delheij; R. D. Hartman; T. Haseyama; C. D. Keith; J. N. Knudson; A. Komives; M. Leuschner; L. Y. Lowie; A. Masaike; Y. Matsuda; G. E. Mitchell; S. I. Penttilä; H. Postma; D. Rich; N. R. Roberson; S. J. Seestrom; E. I. Sharapov; S. L. Stephenson; Y. F. Yen; V. W. Yuan

doi:10.1103/PhysRevC.53.R2576

Rapid Communication

Observation of a large parity nonconserving analyzing power in Xe

J. J. Szymanski, W. M. Snow, J. D. Bowman, B. Cain, B. E. Crawford, P. P. J. Delheij, R. D. Hartman, T. Haseyama, C. D. Keith, J. N. Knudson, A. Komives, M. Leuschner, L. Y. Lowie, A. Masaike, Y. Matsuda, G. E. Mitchell, S. I. Penttilä, H. Postma, D. Rich, N. R. Roberson, S. J. Seestrom, E. I. Sharapov, S. L. Stephenson, Y. F. Yen, and V. W. Yuan

Phys. Rev. C 53, R2576(R) – Published 1 June 1996

Abstract

A large parity nonconserving longitudinal analyzing power was discovered in polarized-neutron transmission through Xe. An analyzing power of 4.3±0.2% was observed in a $p$ -wave resonance at $E_{n} = 3.2$ eV. The measurement was performed with a liquid Xe target of natural isotopic abundance that was placed in the polarized epithermal neutron beam, flight path 2, at the Manuel Lujan Neutron Science Center. This apparatus was constructed by the TRIPLE Collaboration, and has been used for studies of parity symmetry in compound nuclear resonances. Part of the motivation of the experiment was to discover a nucleus appropriate for a sensitive test of time-reversal invariance in polarized-neutron transmission. The large analyzing power of the observed resonance may make it possible to design a test of time reversal invariance using a polarized-Xe target.

Received 25 March 1996

DOI:https://doi.org/10.1103/PhysRevC.53.R2576

Authors & Affiliations

J. J. Szymanski¹, W. M. Snow¹, J. D. Bowman², B. Cain^1,*, B. E. Crawford³, P. P. J. Delheij⁴, R. D. Hartman¹, T. Haseyama⁵, C. D. Keith¹, J. N. Knudson², A. Komives¹, M. Leuschner^1,†, L. Y. Lowie⁶, A. Masaike⁵, Y. Matsuda⁵, G. E. Mitchell⁶, S. I. Penttilä², H. Postma⁷, D. Rich¹, N. R. Roberson³, S. J. Seestrom², E. I. Sharapov⁸, S. L. Stephenson⁶, Y. F. Yen², and V. W. Yuan²

¹Department of Physics, Indiana University, Bloomington, Indiana 47405
²Los Alamos National Laboratory, Los Alamos, New Mexico 87545
³Duke University, Durham, North Carolina 27706 and Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708
⁴TRIUMF, Vancouver, British Columbia, Canada V6T 2A3
⁵Department of Physics, Faculty of Science, Kyoto University, Kyoto 606-01, Japan
⁶North Carolina State University, Raleigh, North Carolina 27695 and Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708
⁷University of Technology, P. O. Box 5064, 2600 GA Delft, The Netherlands
⁸Joint Institute for Nuclear Research, 141980 Dubna, Moscow, Region, Russia

^*Present address: Department of Physics, Texas A and M University, College Station, TX 77843.
^†Present address: Department of Physics, University of New Hampshire, Durham, NH 038245.

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Vol. 53, Iss. 6 — June 1996

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