Energy Levels of ⁹⁵Tc from the ⁹⁵Mo(p, nγ)⁹⁵Tc Reaction

Abstract

Energy levels of ⁹⁵Tc have been investigated by means of the ⁹⁵Mo(p, nγ) reaction. Excitation functions of γ-ray yields were measured with a Ge(Li) detector in the bombarding energy range from 2.8 MeV to 5.1 MeV in steps of 10 keV to 100 keV. The decay scheme which includes 40 levels and 104 γ rays has been constructed from the comparisons of the 1st 2⁺ and the 2nd 4⁺ isobaric analogue resonance yields, threshold energies for 88 γ rays, branching ratios, γ-ray angular distributions and systematics. Spin and parity values for the 9th, 13th and 15th excited states were assigned as 1/2⁺, 9/2⁻ and 7/2⁻, respectively. New levels at 1837.5 keV(7/2⁺, 9/2⁺), 1873.9 keV(7/2⁺, 9/2⁺), 1888.8 keV(5/2⁻) and 2118.1 keV(7/2⁺, 9/2⁺) were also proposed. A rotation-particle-coupling model calculation has been undertaken in ^95,97,99Tc isotopes. The calculation gives reasonable agreements with the experimental results.