Two-dimensional solid state gaseous detector based on ${}^{10}B$ layer for thermal and cold neutrons

Abstract

Two-dimensional solid state gaseous detector for thermal and cold neutrons is created. The detector has active area of 128 x 128 $m{m}^2$, ${}^{10}B$ neutron converter, and gas chamber with thin windows. The resistive charge-division readout is applied to determine the neutron position. The detector was tested using $W-Be$ photoneutron source at the Institute for Nuclear Research, Moscow. The detector efficiency is estimated as ~4% at neutron wavelength $\lambda =1.82\mathring{A}$ and 8% at $\lambda =8\mathring{A}$. The efficiency of the background detection was less than $10^{-5}$ of that for thermal neutrons. The resulting pulse height resolution and the spatial resolution are estimated as $\approx 15\%$ and $\approx 2.5mm$, respectively.

5 pages, 10 figures, 1 table