Neutron capture by Ru: Neutron cross sections ofRu96,102,104andγ-ray spectroscopy in the

Abstract

Cross sections for radiative capture of neutrons have been measured for stable isotopes of Ru with mass numbers 96, 102, and 104. From separate irradiations using thermal and epithermal neutrons, independent values for the thermal cross section and effective resonance integral have been determined. Spectroscopic studies of the γ rays emitted in the decays of 97,103,105 Ru have enabled improvements in the precision of the energies and intensities of the radiations along with corresponding improvements in the β-decay feeding intensities and the energies of the levels in the respective daughter nuclei. Similar spectroscopic measurements of the decays of 105 Rh (daughter of 105 Ru) and 96 Tc (produced from n, p reactions on 96 Ru) have resulted in improved γ -ray energies and intensities in those decays.

Precise measurement of αK and αT for the 39.8-keV E3 transition in Nica1, Hardy2, Iacob3 et al. 2018Phys. Rev. C6000View full textAdd to dashboardCite

“…The relative γ-ray intensities we measure from 103 Ru β decay, corrected for coincidence summing, are given in Table II, where they are compared with previous measurements. It can be seen that our results are the most precise, and agree well with the measurements by Macias et al [17] and by Krane [33], but not with the results of Chand et al [32], particularly for the two lowest-energy peaks. Given this situation, we choose to use only our own results rather than an average over world data.…”

Reanalysis of radioisotope measurements of theBe9(γ,n)Be8cross section

“…The neutron count rate, neutron detection efficiency (εn), photon source intensity, and source intensity corrections are shown. Half-lives and branching fractions are from relevant Nuclear Data Sheets[47][48][49][50][51][52] and from recent experiments[53,54].…”

Evaluation of neutron nuclear data on ruthenium isotopes

“…The thermal capture cross sections of both nuclei are listed in Table 3, where the recommendation of Mughabghab [10] is also given. It should be noted that [9] 0.207 ± 0.010 Mughabghab [10] 0.29 ± 0.02 102 Ru Present 1.178 JENDL-4.0 1.475 Krane [9] 1.14 ± 0.05 Mughabghab [10] 1.27 ± 0.04 the JENDL-4.0 evaluation of the thermal capture cross section of 102 Ru placed much emphasis on a value of 1.50 ± 0.22 barns measured by Katcoff and Williams [11], resulting in deviation from the other works in the table. The thermal cross sections and RRPs for the rest of Ru isotopes remain unchanged from JENDL-4.0.…”