Calibration of Apparatus for Parity-Violating Neutron Spin Rotation in $^{4}$He Using Heavy Nuclei and Small Angle Scattering Standards

ORAL

Abstract

A measurement of parity-violating (PV) neutron spin rotation in liquid $^{4}$He, is being prepared at the NIST Center for Neutron Research (NCNR). To test the apparatus and amplify certain possible systematic effects we plan to conduct spin rotation measurements in the nuciei $^{139}$La, $^{81}$Br, and $^{35}$Cl. Large PV spin rotation effects have been seen in the past in $^{139}$La and $^{81}$Br, and $^{35}$Cl possesses a large P-odd gamma asymmetry. We also plan to use D$_{2}$O, whose small angle neutron scattering is well-known, to verify our estimates of systematic effects from small angle scattering and longitudinal magnetic fields. I will talk about our choices of targets and the design of target system. Work supported in part by NSF PHY-0457219.

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Authors

  • J.M. Dawkins

    • Indiana Univ./IUCF

  • V. Zhumabekova

    • Al-Farabi Khazakh National Univ.

  • K. Gan

  • A.K. Opper

    • The George Washington Univ.

  • B.E. Crawford

    • Gettysburg College

  • C.D. Bass

  • T.D. Findley

  • J.C. Horton

  • C.R. Huffer

  • D. Luo

  • A.M. Micherdzinska

  • M. Sarsour

  • W.M. Snow

    • Indiana Univ./IUCF

  • E.I. Sharapov

    • Joint Institute for Nuclear Reserach, Dubna

  • H.P. Mumm

  • J.S. Nico

    • NIST

  • D.M. Markoff

    • North Carolina Central Univ.

  • P.R. Huffman

    • North Carolina State Univ. /TUNL

  • B.R. Heckel

  • H.E. Swanson

    • Univ. of Washington