The first meeting of the User Committee of the IBR-2 neutron source was organized at FLNP on 24 of February and took place via videoconference. The User Committee of the IBR-2 neutron source has recently been established to increase the user activity related to the interactions with the FLNP, giving support to both specific and general user questions, and with the aim to provide a discussion forum for the benefit of the users. The IBR-2 User Committee proposes new strategic ideas and procedures to the FLNP Directorate with the ultimate goal to improve the quality and efficiency of the organizational issues related to the user operation at the IBR-2.

Delegates from Poland, Bulgaria, Hungary, Armenia and Spain have taken part on this first meeting of the User Committee and the FLNP directorate. The agenda of this meeting included the introduction of the User committee members and of the FLNP directorate, followed by a discussion on further steps of the development of the IBR-2 instruments & infrastructure, ways to improve users’ satisfaction and to a general success of neutron science at IBR-2. During this first meeting, some questions concerning organization of the neutron scattering experiments, as well as future plans and ideas were discussed in detail. From now on meeting of the User Committee will be organized on regular basis.

"The acceleration effect in quantum mechanics"

Zakharov M.A.

The report is devoted to the development of ideas about the Acceleration Effect as a general physical effect formulated in the recent work of A. I. Frank. It is devoted to the presentation of the results of a numerical study of the manifestation of the acceleration effect in the interaction of a particle with various accelerating quantum objects.

A wave packet with parameters characteristic of ultracold neutrons was considered as a particle. Various planar potential structures were used as quantum objects, namely: potential step, potential barrier, potential well, double potential step, interference filter, two-layer structure.

The problems were studied by numerically solving the nonstationary Schrödinger equation by splitting the evolution operator. The spectra of the resulting state after the interaction of the packet with the object were obtained.

The results demonstrate a pronounced presence of the acceleration effect in all studied problems. In the case of resonant structures, the acceleration effect is proportional to the lifetime of the state inside the object (which can be many times longer than the time of flight of a particle). The results obtained confirm the hypothesis that the acceleration effect is a consequence not so much of the passage of a particle through an accelerated refractive sample, as the existence of a nonzero interaction time in quantum mechanics.


"Solemn seminar dedicated to the 90th birth anniversary of G.A. Ososkov

Workshop program

 - Official part.  Speeches by colleagues and friends

 - Scientific part

P.V.  Goncharov, “Using deep learning methods to reconstruct the trajectories of elementary particles”

A.S.  Zhemchugov, “Fast track recovery for the SPD experiment”

A.A.  Lebedev, S.A.  Lebedev, “Reconstruction of events in the CBM experiment”


Information about the seminar and a link to connect are posted on Indico:

Meeting agenda:

Discussion of proposals on the nomination of scientific works for the FLNP competition for 2020 under the section "competition of scientific works in condensed matter physics”

"JINR Innovative Radiobiological Research Program"

A.N.  Bugai

An international program of radiobiological research, formed by the Laboratory of Radiation Biology within the framework of the project of the JINR Innovation Center at the accelerators of the Institute and member-countries, is presented.  The program includes two main fields: medical radiobiology and brain sciences.  The tasks of the first field include the development of new breakthrough approaches to increase the efficiency of radiation and radionuclide therapy.  The second field concerns studies of the mechanisms of radiation-induced disorders in the central nervous system.