METHOD TO PRODUCE BEAM OF MONOENERGETIC NEUTRONS, DEVICE FOR PRODUCTION OF BEAM OF MONOENERGETIC NEUTRONS AND METHOD TO CALIBRATE DETECTOR OF DARK MATTER WITH USING OF BEAM OF MONOENERGETIC NEUTRONS

摘要

FIELD: power engineering.;SUBSTANCE: method includes radiation with a beam of protons with energy exceeding 1.920 MeV, a neutron-generating target, at the same time the beam of monoenergetic neutrons is formed from neutrons, which spread in direction that is reverse to direction of spread of the beam of protons. By varying the energy of protons and the angle of neutrons release, they create a monoenergetic neutron beam with any required energy. To exclude neutrons with other energies, which randomly got into the beam, it is possible to place a filter on the way of the beam. The method to calibrate the dark matter detector with liquid Ar as a working substance consists in the fact, that it is radiated with a beam of monoenergentic neutrons with energy of 74-82 keV, generated during radiation of the target ⁷Li(p,n)⁷Be with a beam of protons with energy exceeding 1.920 MeV, and formed in accordance with the above method using a sulphur filter with subsequent registration of the completed ionisation of liquid argon.;EFFECT: possibility to produce a beam of monoenergetic neutrons designed for calibration of a dark matter detector, with different energies without beam scattering.;9 cl, 4 dwg