抄録
The polarization of protons elastically scattered by helium was measured by the double scattering method. Incident proton or alpha-particle beam was obtained from the INSJ 160 cm variable energy cyclotron. Three interdependent measurements, in which the polarization product was equal to P1P2, P2P3 or P3P1, were made. The following results were obtained:
P1(6.2 MeV,130.0°)=0.92±0.11
P2(11.5 MeV,61.1°)=−0.45±0.06
P3(9.1 MeV,61.1°)=−0.45±0.06,
where angles and energies are those in the center-of-mass system. Experimental values of the polarization agreed well to the values calculated by using phase shifts, which were obtained from the analysis of the angular distribution of the scattering cross sections.
