Positive pion production from the bombardment of <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">Be</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>9</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math></span> with 200, 225, and 250 MeV polarized protons

E. G. Auld; G. Jones; G. J. Lolos; E. L. Mathie; P. L. Walden; R. B. Taylor

doi:10.1103/PhysRevC.25.2222

Positive pion production from the bombardment of ${}^{9}{Be}$ with 200, 225, and 250 MeV polarized protons

E. G. Auld, G. Jones, G. J. Lolos, E. L. Mathie, P. L. Walden, and R. B. Taylor

Phys. Rev. C 25, 2222 – Published 1 May 1982

Abstract

The analyzing power angular distributions $A_{y} (θ)$ for the ${}^{10}{Be}_{g . s .}$ as well as the ${}^{10}{Be}_{3.37}$ * state transitions from the ${}^{9}{Be}$ ( $\vec{p}$ , $π^{+}$ ) ${}^{10}{Be}$ reaction are reported as a function of incident proton energy from 200 to 250 MeV. Instead of the dramatic dependence on energy characterizing the ${}^{12}C$ ( $\vec{p}$ , $π^{+}$ ) ${}^{13}C$ reaction, the analyzing power for the present reaction shows little variation with energy. At energies above 200 MeV the analyzing power angular distributions exhibited by the ( $\vec{p}$ , $π^{+}$ ) reactions on ${}^{9}{Be}$ and ${}^{12}C$ are markedly different, unlike the earlier observations at 200 MeV where the distribution was essentially the same.

NUCLEAR REACTIONS ${}^{9}{Be}$ ( $\vec{p}$ , $π^{+}$ ) ${}^{10}{Be}_{g . s .}$ and ${}^{10}{Be}_{3.37}$ *, polarized protons, $T_{p} = 200 - 250$ MeV, measured $A_{y} (θ)$ for ${}^{10}{Be}_{g . s .}$ and ${}^{10}{Be}_{3.37}$ * transitions.

Received 13 July 1981

DOI:https://doi.org/10.1103/PhysRevC.25.2222

Authors & Affiliations

E. G. Auld, G. Jones, G. J. Lolos, E. L. Mathie^*, and P. L. Walden

Physics Department, University of British Columbia and TRIUMF, Vancouver, British Columbia, Canada V6T 2A6

R. B. Taylor

Physics Department, James Cook University of North Queensland, Townsville, North Queensland, Australia

^*Present address: Schweizerisches Institute für Nuklearforshung (SIN), CH-5234 Villigen, Switzerland.

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Vol. 25, Iss. 5 — May 1982

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Physical Review C

covering nuclear physics