Excited Levels in F20 at 1.82 and 1.84 MeV

Examination of the γ-ray spectrum from O¹⁸(He³, pγ)F²⁰ in the region near 1.85-MeV excitation has indicated the existence of a new level in addition to the one previously reported. With a magnetic spectrograph, this doublet structure has been confirmed, and the excitation energies of the two levels have been measured as 1824.4+/-2.1 and 1843.0+/-2.2 keV. The separation is 18.6+/-0.7 keV. Directional correlations of γ rays from these levels have been studied in an axially symmetric arrangement. Based on these correlations, the spins of both levels are restricted to the values 1, 2, or 3; a probable assignment of spin 2 or 3 is made for the 1.84-MeV level. Branching ratios and multipole mixtures are reported.