Measurement of half-lives for 87m,g Y and 196m,g,194 Au produced from the photon and neutron induced reactions of 89 Y and 197 Au

AbstractWe have measured the half-lives of87mY and87gY produced from the89Y( γ, 2n) and89Y(n, 3n) reactions with the bremsstrahlung end-point energy of 65  MeV and the average neutron energy of 37.2 MeV using an activation and an off-line γ-ray spectrometric technique, respectively. The bremsstrahlung photon was produced by using the 100 MeV electron linac of the Pohang Accelerator Laboratory (PAL), whereas the fast neutron was produced from the9Be(p, n) reaction by using the 45  MeV proton of the MC-50 Cyclotron at the Korea Institute of Radiological and Medical Sciences (KIRAMS). We have also measured the half-lives of194Au and196m2,gAu produced from the197Au( γ, xn; x = 1, 3) and197Au(n, xn; x  = 2, 4) reactions with the bremsstrahlung end-point energy of 60 MeV and the average neutron energy of 37.2 MeV using the same technique and the same facilities as mentioned above. The induced γ-ray activities of the irradiated samples were measured by using an energy- and efficiency calibra ted high purity germanium (HPGe) detector. The spectrum analysis has been done by using the ROOT software to separate signals from background. The measured half-lives are compared with the literature values and are in general agreement with each other within the uncertainties.
Source: Journal of Radioanalytical and Nuclear Chemistry - Category: Nuclear Medicine Source Type: research