https://doi.org/10.1051/epjconf/202023105010
Hybrid boron-10 gaseous detector for slow and fast neutron simultaneous detection
1 Institute for Nuclear Research, Russian Academy of Sciences, 117312 Moscow, Russia
2 State Research Institute for Chemistry and Technology of Organoelement Compounds, 119991 Moscow, Russia
* Corresponding author: potashev@inr.ru
Published online: 11 March 2020
A hybrid position-sensitive neutron detector with active 10B-layer and proportional chamber filled by the gas mixture Ar+25%CO2 is being studied. The detector is used on the neutron source based at the linear accelerator. Recording two pairs of pulse heights which are produced in two gas gaps by 7Li and 4He nuclei between the anode and two cathodes gives a possibility to determine the X and Y neutron coordinates. This detector permits time-of-flight measurements. A significant difference in pulse height spectra for slow and fast (several MeV) neutrons was observed in experiment. In recent experiments with 10B-detector we found that (1) the pulse heights depend on the neutron energy and (2) the position of the maximum in the pulse height spectrum varies monotonically versus the maximum neutron energy.
© The Authors, published by EDP Sciences, 2020
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