Frank Laboratory of Neutron Physics

Topical Seminar

FLNP – Department of Spectrometers’ Complex

Leaders – Belushkin A.V., Prikhodko V.I.

Date and Time: Friday, 31 May 2019, at 11:00 AM

Venue: Department of Spectrometers’ Complex, Conference hall, bld. 119, Frank Laboratory of Neutron Physics

Seminar topic: «Study of LiInSe₂ single crystals for the thermal neutron detection»

Authors: A. V. Belushkin^a,d, A. A. Bogdzel^a, A. A. Goloshumova^b,c, L. I. Isaenko^b,c, S. I. Lobanov^b,c, V. M. Milkov^a, A. Yu. Tarasova^b,c, A. P. Yelisseyev<sup>b,c

a</sup> – Frank Laboratory of Neutron Physics, JINR, Dubna
^b – Novosibirsk State University, Novosibirsk
^c – Institute of geology and mineralogy, Siberian Branch, Russian Academy of Sciences, Novosibirsk
^d – Institute of Physics, Kazan Federal University, Kazan

Speaker: A. V. Belushkin

Abstract:

Lithium-indium di-selenide (LiInSe2) is the new semiconductor material, sensitive to the thermal neutrons. LiInSe2 compound was synthesized from Li (99.99%), In (99.999%), Se (99.999%). LiInSe₂ (LISe) single crystals growth was performed using the vertical option of Bridgeman-Stockbarger method. The crystals were characterized using the electrical conductivity and optical spectroscopy methods. Stoichiometric composition of the LiInSe2 was confirmed by the high precision chemical analysis as well as by X-ray diffraction. Compact neutron source 252Cf – with the activity 6,3 x 10⁵ n/s allowed to measure amplitude characteristics and to define the optimal operating voltage for neutron detection. Time-of-flight neutron spectra were measured at the fast pulsed research reactor IBR-2 at JINR.