Publication details
Pulse-shape discrimination of the new plastic scintillators in neutron–gamma mixed field using fast digitizer card
| Authors | |
|---|---|
| Year of publication | 2015 |
| Type | Article in Periodical |
| Magazine / Source | Radiation Physics and Chemistry |
| MU Faculty or unit | |
| Citation | |
| Web | http://www.sciencedirect.com.ezproxy.muni.cz/science/article/pii/S0969806X15001759 |
| Doi | http://dx.doi.org/10.1016/j.radphyschem.2015.05.007 |
| Field | Nuclear, atomic, and moleculary physics |
| Keywords | Scintillation detectors; Mono-energetic neutron sources; Pulse-shape discrimination; Figure of merit; Digital-signal processing |
| Description | Recently invented plastic scintillator EJ-299-33 enables pulse-shape discrimination (PSD) and thus measurement of neutron and photon spectra in mixed fields. In this work we compare the PSD properties of EJ-299-33 plastic and the well-known NE-213 liquid scintillator in monoenergetic neutron fields generated by the Van de Graaff accelerator using the 3H(d, n)4He reaction. Pulses from the scintillators are processed by a newly developed digital measuring system employing the fast digitizer card. This card contains two AD converters connected to the measuring computer via 10 Gbps optical ethernet. The converters operate with a resolution of 12 bits and have two differential inputs with a sampling frequency 1 GHz. The resulting digital channels with different gains are merged into one composite channel with a higher digital resolution in a wide dynamic range of energies. Neutron signals are fully discriminated from gamma signals. Results are presented. |