FLEROV LABORATORY of NUCLEAR REACTIONS

Seminar of FLNR Physics Sectors

Date and Time: Thuesday, 13 June 2017, at 3:30 PM

Venue: Conference hall, Flerov Laboratory of Nuclear Reactions

Seminar topic: “Modeling and analysis of few-nucleon reactions to obtain data on the low energy parameters for NN-interference” (on materials of Candidate thesis)

Speakers: A.A. Kasparov (Institute for Nuclear Research of the Russian Academy of Sciences)

Abstract:

This thesis is about the new approaches to acquisition of data on NN-interaction low energy parameters in reactions with formation and breakup of NN-virtual states. A number of computer programs for kinematic simulation of nuclear reactions with any amount of secondary particles as well as some accessory programs for experiment simulation based on kinematic simulation are described here. Some nuclear reactions were calculated with these programs. Special consideration was given to the simulation of d + ²H –> (nn)^s + (pp)^s –> p + p + n + n reaction forming singlet diproton and dineutron in the intermediate stage. The experimental setup based on d + ²H –> p + p + n + n reaction simulation is described. The results of experimental study of this reaction are given. Comparison of d + ²H –> p + p + n + n reaction experimental data and the simulation results gave a_nn=-22.2+-0.6 fm nn-scattering length in this reaction.