Molekulární cytologie a cytometrie
Fast neutrons from thick helium target irradiated by 17 MeV deuterons
Publikace: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 466, 509-512 Autoři: Bem, P., Burjan, V., Cvachovec, F., Gotz, M., Kralik, M., Kroha, V., Lukasova, E., Simeckova, E., Vincour, V. Rok: 2001
The spectral yield of fast neutrons from the d + He (thick target) reaction has been measured at different angles for the incident deuteron energy of 17 MeV. The measurement has been performed in an open geometry employing the shadow-bar method. The scintillation detection technique with two-dimensional n-gamma discrimination electronics has been used. In the measurement, the list mode of the PC data-acquisition system was effectively employed in the elimination of the parasitic neutron contribution, caused by the random fluctuation of the beam-spot position out of the target window. The measured angular distribution of the neutron yield was compared with relevant data of the reaction Be(d, xn). The high yield, Gaussian-like shape of the energy spectrum and strongly forward-directed emission of neutrons from the thick He target seem to be advantageous for selected irradiation tasks. (C) 2001 Elsevier Science B.V. All rights reserved.