PHASE-SHIFT ANALYSIS OF 160(ALPHA, ALPHA)160 SCATTERING FROM 5-MEV TO 10-MEV

Angular distributions for the elastic scattering of α particles by O16 have been measured at 10-keV intervals from a bombarding energy of 5.0-12.5 MeV. Real phase shifts have been extracted by means of a partial- wave analysis of the data between 5 and 10 MeV. Twenty-seven resonances are found in the Ne20 excitation energy range of 8.73-12.77 MeV. Seven of the corresponding levels in Ne20 have not been previously reported. Spins and parities are assigned to 26, confirming a number of previously tentative assignments and correcting a few. Resonance widths are estimated for most of the levels. © 1969 The American Physical Society.