31st International Seminar on Interaction of Neutrons with Nuclei: Fundamental Interactions & Neutrons, Nuclear Structure, Ultracold Neutrons, Related Topics (ISINN-31)

Parameters of Extracted Neutron Beams of the IREN Resonance Neutron Source at the FLNP, JINR

29 May 2025, 12:20

15m

Room V6 (4th floor)

Parallel session 3 Parallel Session 3: Neutron detection & Methodical aspects/Physics of ultracold neutrons

Speaker

Almat Yergashov (JINR)

Description

There are several instruments on the flight bases of the IREN facility that are used to carry out measurements on the transmission, capture and scattering of neutrons on samples.
The analysis of experimental data, the assessment of the possibility of conducting, and the planning of experiments with IREN beams require knowledge of the facility parameters: the absolute fluxes of resonance and thermal neutrons at the sample locations, the dependence of the neutron fluxes on the neutron energy, and the energy resolution function of the instruments.
The fluxes of thermal and resonance neutrons, the dependence of the neutron flux on their energy, and the resolution function were determined experimentally for 11-meter and 60-meter bases (on channels 4 and 3) of the IREN facility, JINR. The experimentally determined parameters are compared with the results of Monte Carlo calculations.