Yrast states in the doubly-odd nucleus100Tc

Abstract

Abstract. High spin states up to J = 14 and excitation energy up to E* = 3076 keV have been observed in the odd odd nucleus 100Tc with the reaction 96Zr(TLi, 3n), at bombarding energies between 21 and 31 MeV, by in-beam 7 spectroscopy and conversion-electron measurements.A AJ = 1 negative parity band similar to that observed in the N = 57 isotone l~ and based on the 8-, 708 keV state has been identified. The observed band can be interpreted in terms of collective core excitations based on a two-quasiparticle state of (gg9/2 @ vhl 1/2) configuration.Comparison with IBFM-2 calculations have been performed.

Prompt Gamma Rays Emitted in Thermal-neutron Capture Reaction by 99Tc and Its Reaction Cross Section

“…High-spin yrast states of 100 Tc were investigated using the 96 Zr( 7 Li; 3n) reaction. 31) The highest excitation energy and spin-parity reported in the study are 3,075.7 keV and 14 À , respectively.…”

“…There were several studies which aimed at establishing low-lying levels in 100 Tc using 99 Tc(n th ; ), 22,24) 100 Mo(d; 2n), 24) 99 Tc(d; p), 27) 100 Mo(p; n), [28][29][30] and 96 Zr( 7 Li; 3n) 31 29) investigated low-lying levels of 100 Tc with the same reaction in the energy range of 4:0 E p 6:8 MeV by means ofcoincidence technique, and constructed a level scheme up to 521.0 keV. Á rvay et al 30) reported a level scheme up to 906.1 keV energy.…”

Prompt Gamma Rays Emitted in Thermal-neutron Capture Reaction by99Tc and Its Reaction Cross Section

“…(1) 456.69-keV Level A level with spin-parity of 7 þ was reported at almost the same energy (457.0 keV in the original report, 31) 456.9 keV in Table 3) as this one, but the two levels seem to be different. The 456.69-keV level is populated by the 6,308.5-keV primary ray.…”

“…31) The highest excitation energy and spin-parity reported in the study are 3,075.7 keV and 14 À , respectively.…”

“…The ICCs of the transitions in 100 Tc have been measured and reported for some lower shells by several authors. 24,30,31) In order to deduce the capture cross section, however, total ICCs were in need, and therefore, these were calculated theoretically using the reported ICCs to the lower shells in the following manner. At first, for each study which reports ICC values, the reported value was compared to the theoretical value based on Ref.…”