Evaluation of neutron nuclear data on ruthenium isotopes

Abstract

Neutron nuclear data on 96,98,99,100,101,102,103,104,105,106 Ru have been evaluated for the next version of JENDL general-purpose file in the energy region from 10 −5 eV to 20 MeV. The thermal capture cross sections of 96,102 Ru were modified so as to reproduce the latest measured data. The statistical model was applied to calculate the cross sections above the resolved resonance region. In the calculations, coupled-channel optical-model parameters were used for neutrons. Preequilibrium and direct-reaction processes were taken into account in addition to the compound process. The present evaluation is consistent with available experimental data. The evaluated data are compiled into an ENDF-formatted data file.

Synthesis and preclinical evaluation of BOLD-100 radiolabeled with ruthenium-97 and ruthenium-103

“…The β − emitter 103 Ru can be produced by the irradiation of natural ruthenium ( nat Ru, composition: 96 Ru (5.54%), 98 Ru (1.87%), 99 Ru (12.76%), 100 Ru (12.60%), 101 Ru (17.06%), 102 Ru (31.55%), and 104 Ru (18.62%)) or of enriched 102 Ru with thermal neutrons via the 102 Ru(n, γ) 103 Ru reaction. 26,27 97 Ru can be produced by alpha particle induced nuclear reaction on natural molybdenum ( nat Mo) via nat Mo(α, xn) 97 Ru, 28,29 by the irradiation of enriched 96 Ru with thermal neutrons via the 96 Ru(n, γ) 97 Ru reaction or by proton irradiation of long-lived technetium-99 ( 99 Tc) via 99 Tc(p, 3n) 97 Ru reaction. 30 97 Ru decays by 100% electron capture, releasing photons with energies of 216 keV (86%) and 324 keV (11%), the former of which is within the energy window of clinical SPECT detectors.…”

Evaluation of neutron nuclear data on iodine isotopes

“…Hence, the fast-neutron cross sections for the rest of the fission-product nuclides may need improvements for the next version of JENDL general-purpose file. Under such circumstances, re-evaluations have been actually performed for the data on Er [2], Ga [3], Ru [4], Sb [5] and Te [6], after the release of JENDL-4.0. Iodine is the next target to be dealt with.…”