7Li(p, α)4He reaction with polarized protons from 0.8 to 3 MeV

✍ Scribed by Claude Petitjean; Louis Brown

• Book ID: 104336074
• Publisher: Elsevier Science
• Year: 1968
• Tongue: English
• Weight: 248 KB
• Volume: 111
• Category: Article
• ISSN: 0375-9474
• DOI: 10.1016/s0375-9474(68)90678-7

✦ Synopsis

A polarized beam was used to measure the asymmetry in the angular distribution of the alpha particles from the 7Li(p, ct)4He reaction at 2.07 and 3 MeV. The polarization efficiency Pa(O) can be fitted to the form

where Wo(O) is the normalized angular distribution for unpolarized protons. At these energies, the coefficient As(E) is much larger than A,(E). A polarization excitation function at O = 135°(c. m.) was measured from 0.8 to 3 MeV in 0.1 MeV steps from which A~(E) is calculated. The data consist of 40 points that were measured typically to an accuracy of 2.2 ~o with a target 110 keV thick at 2 MeV bombarding energy. A polarization contour map is given.

NUCLEAR REACTION 7Li(polarized p, ct), E = 0.8-3.0 MeV; measured tr(E; 0); deduced polarization analysing power. Natural target.