High precision studies on the level scheme of 80Se by the resonant-scattering method

The energies and reduced strengths of the γ rays following deexcitation of the 7818.9-keV highly excited level in ⁸⁰Se reached by the (γ,γ′) reaction, were measured using a nickel capture γ source. The level scheme deduced for this nucleus is presented. Measurements of the angular distributions of the scattered radiation permitted the assignment of spin values for most of the low-lying levels in this nucleus. Parity determinations were made comparing the reduced strengths with the statistics of known E 1 and M 1 transitions.