Publications [#313746] of Anton P. Tonchev

Papers Published
  1. Omer, M; Negm, H; Zen, H; Hori, T; Kii, T; Masuda, K; Ohgaki, H; Hajima, R; Hayakawa, T; Daito, I; Shizuma, T; Fujiwara, M; Park, SH; Kikuzawa, N; Rusev, G; Tonchev, AP; Wu, YK, Detection of photon-induced excitations in 235U with LaBr 3:Ce scintillating detectors, Ieee Nuclear Science Symposium Conference Record (2012), pp. 55-58 [doi] .

    Excitations in 235U were measured with LaBr3:Ce scintillation detectors using the nuclear resonance fluorescence (NRF) technique. A NRF experiment was performed at the High Intensity γ-ray Source (HIγS) facility using quasi-monochromatic circularly or linearly polarized γ-ray beams. Photons scattered at 90°relative to the incident beam were detected with two different sizes of cylindrical LaBr 3:Ce detectors. Clear NRF peaks at 1733 and 1815 keV corresponding to de-excitations to the ground state and/or low-lying levels in 235U were observed within 77 minutes of beam time even under the high background due to the self-activity of LaBr3:Ce and the radioactive decay of 214Bi nuclei existing in the 235U target. The present study shows a possibility of using LaBr3:Ce detector to perform NRF experiments, promoting many options for inspection of special nuclear materials. © 2012 IEEE.