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T. R. Donoghue, Sr; M. A. Doyle; H. W. Clark; L. J. Dries; J. L. Regner; W. Tornow; R. C. Byrd; P. W. Lisowski; R. L. Walter

doi:10.1103/PhysRevLett.37.981

Equality of Analyzing Power and Polarization in the Reaction ${}^{3}H {(p, n)}^{3} He$

T. R. Donoghue, Sr., M. A. Doyle, H. W. Clark, L. J. Dries, J. L. Regner, W. Tornow, R. C. Byrd, P. W. Lisowski, and R. L. Walter

Phys. Rev. Lett. 37, 981 – Published 11 October 1976

Abstract

The quantities $A_{y}$ and $P^{y}$ were remeasured for $E_{p} < 4$ MeV in the reaction ${}^{3}H {(p, n)}^{3} He$ . Although our $A_{y}$ data confirm previous data, our $P^{y}$ values are appreciably larger than earlier results and in fact agree well with those for $A_{y}$ . Elimination of the previously reported $A_{y} - P^{y}$ difference has important consequences. Charge-symmetry-breaking effects must be small or nonexistent in this reaction; and the previously required $f$ -wave admixture to the lowest $J^{π} = 2^{-}$ state of ${}^{4}{He}$ is no longer necessary.

Received 20 August 1976

DOI:https://doi.org/10.1103/PhysRevLett.37.981

Authors & Affiliations

T. R. Donoghue, Sr.^†, M. A. Doyle^*,†, H. W. Clark^†, L. J. Dries^†, and J. L. Regner^†

Department of Physics, The Ohio State University, Columbus Ohio 43210

W. Tornow^‡,§, R. C. Byrd^§, P. W. Lisowski^§, and R. L. Walter^§

Department of Physics, Duke University, Durham, North Carolina 27701,
Triangle Universities Nuclear Laboratory, Durham, North Carolina 27706

^*Now at Regis College, Weston, Mass. 02193.
^†Work supported in part by the National Science Foundation.
^‡Supported by Deutsche Forschungsgemeinschaft.
^§Work supported in part by the U. S. Energy Research and Development Administration.