High-spin states in99Tc

Abstract

The level scheme of 99Tc was studied by y-ray spectroscopy with the 96Zr(6Li, 3 n y)99Tc reaction. New levels were established and spins and parities assigned. 99Tc is compared with 93'95'97Tc, with the neighbouring even-even Mo-isotopes and with the results of an IBFM calculation.Nuclear Reaction: 96Zr(6Li, 3n)99Tc, ELi=24-31 MeV, measured E~, I~, y-excitation functions, yy-coincidences, y-angular distributions, 99Tc deduced levels, J, re, enriched target, Ge(Li). IBFM calculation.

Shape trends and triaxiality in neutron-rich odd-mass Y and Nb isotopes

“…However, less has been reported for the odd-Z neighbours so far. High-spin states in 99,101,103 Tc (Z = 43, N = 56, 58, 60) have been studied and the single-proton states located around the Fermi level were discussed as a function of deformation [11,12,13]. Triaxial deformation was observed in 105 Rh (Z = 45, N = 60) and used to explain the large signature splitting in the ground-state band based on a g 9/2 odd proton, while a shape change from triaxial (in the ground-state band) to prolate deformation (in the three-quasiparticle band with very small signature splitting) was discussed [14].…”