Level structure of 100Tc

The 99Tc(n,γ)100Tc cross section, 99Tc(d,p)100Tc and the 100Tc decay scheme and neutron binding energy

“…Many of the coincident γ-rays shown there are either inconsistent with the placements in the adopted decay scheme [8], or are not placed in the decay scheme at all. In particular, the γ-rays with energies of 31, 43, 75, 99, 105, 179 and 181 keV are all shown on the Pinston decay scheme as not being in coincidence with the 299 keV γ-ray.…”

“…Each sum gives a value of the neutron binding energy of 100 Tc. The average of the sums for the 10 lowest laying levels fed by primary gamma rays of 100 Tc was calculated to give a new value of the neutron binding energy of: E b = 6764.85 ± 0.25 keV which is 0.45 keV higher and has four times smaller uncertainty than the previously accepted value [8] in TOI.…”

“…The previous knowledge about the decay scheme of the lowlying levels of 100 Tc, taken from the work of Pinston et al [8], is shown in figure 1.…”

“…Each fully corrected primary γ-ray energy was then added to the corresponding level energy of the final state for the γ-decay. The level energies were the very accurate values determined with a crystal diffraction spectrometer by Pinston et al [8]. Each sum gives a value of the neutron binding energy of 100 Tc.…”

Partial and total thermal neutron capture cross sections for non-destructive assay and transmutation monitoring of 99Tc

“…The relative efficiency was determined using radioactive sources and capture γ -rays as described elsewhere [6]. Partial cross-sections for the strong 172, 223 and 263 keV capture γ -rays [7,8] as well as for the 539 and 591 keV γ -rays from 100 Tc decay [9] were determined from the same in-beam spectrum. In the latter case, however, the yield of a decay line is proportional to the effective counting time:…”