Measurement of double differential neutron yields from thick carbon target irradiated by 5-MeV and 9-MeV deuterons

Abstract

Double differential neutron yields from carbon target irradiated by 5 MeV and 9 MeV deuterons were measured at the Kyushu University Tandem Accelerator Laboratory. A carbon target was thick enough to stop the incident deuterons in the target. An NE213 liquid organic scintillator was employed to detect neutrons emitted from the target and placed at several directions from 0° to 140°. To estimate the contribution of scattered neutrons from the floor and walls, neutron yields were measured with an iron shadow bar located in front of the scintillator. The measured energy spectrum was derived by an unfolding method with FORIST and MAXED codes using the response functions of the NE213 scintillator calculated with the SCINFUL-QMD code. The incident energy dependence of total thick target neutron yields for carbon was investigated over the energy range from 5 to 50 MeV and the empirical formula was obtained. The measured neutron energy spectra were also compared with the calculations by PHITS code.

Modelling and analysis of nucleon emission from deuteron-induced reactions at incident energies up to 100 MeV

“…The experimental data are taken from Refs. [22][23][24][25][26][27]. In the wide incident energy range, the present calculation reproduces both the shape and magnitude of the experimental TTNY spectra at forward angles around 0 o .…”

Measurement of Double Differential Neutron Yields from Thick Aluminum Target Irradiated by 9 MeV Deuteron

“…In the calculations, the Shen formula [15] was chosen as a calculation option of total reaction cross sections instead of the default option with the NASA formula [16] because the former formula provided better result than the latter in our early work on C target [10]. The dynamical process and the subsequent evaporation process are described with the JAERI quantum molecular dynamics model (JQMD) [17] or the INCL model and the generalized evaporation model (GEM) [18], respectively.…”

“…Details of the experimental set up have been reported in Refs [9,10,11]. The experiments were carried out at the 1st target room in the Kyushu University Tandem accelerator Laboratory (KUTL).…”

“…The target thickness was chosen so that 9 MeV deuterons are stopped completely in the targets. The carbon target was used for comparison with our early data [10] and for after-mentioned detector calibration.…”

“…Several experimental data related to neutron source targets such as lithium, beryllium and carbon were measured [5,6,7,8], however, there are few data for accelerator structure material targets such as iron, aluminum, copper and others. Recently, systematic measurements of double differential thick target neutron yields (DDTTNYs) for several targets have been performed in Kyushu University [9,10,11]: carbon, titanium, cupper and niobium at 5 and 9 MeV, but aluminum only at 5 MeV. There are available DDTTNYs at 40 MeV for carbon and aluminum measured in Tohoku University [12].…”