Observation of intrashell radiative decay of Li-like uranium (2p(3/2)-2s(1/2)) using silicon drift detectors
Abstract
We observed the x-ray emission of 191.7 MeV u−1 Li-like uranium associated with resonant coherent excitation from 1s22s to 1s22p3/2 (4459 eV) in a thin silicon crystal target. De-excitation x-rays were observed by using large-area silicon drift detectors installed inside the target vacuum chamber together with their preamplifiers. We found that the x-ray yield under the resonance condition was clearly enhanced by a factor of three compared to that under the random incidence condition.