ASRP-2026 School & BRIA-2026 Conference

Session

Lectures & Reports at Moselle

LR27/6-3

27 Jun 2026, 14:20

Yerevan & Jermuk

200. Optical Absorption and Photoionization of Coulomb Systems in Colloidal CdSe Nanoplatelets: A Brief Review

Hayk Sarkisyan (Institute of Applied Problem of Physics)

27/06/2026, 14:20

In this paper, the phenomena of optical absorption and photoionization of exciton and impurity systems localized within colloidal CdSe nanoplatelets (NPLs) are theoretically and numerically investigated, taking into account the dielectric confinement effect. It is shown that reducing the dimensionality of the semiconductor and accounting for polarization effects at the NPL/environment...

190. Numerical modelling of twisted radiation of relativistic electrons from a spiral target

Nikita Berdnikov

27/06/2026, 15:10

As recent studies have shown, radiation with orbital angular momentum – commonly referred to as twisted radiation – has the potential to become a new tool in research, owing to the additional degree of freedom provided by the orbital angular momentum [1]. This type of radiation and the additional degree of freedom it offers can provide valuable additional information about the interactions of...

184. Study of the quasar 0827+24 and the distribution of quasars located within a conical section of radius 6° around it

Aleksandr Voskanyan

27/06/2026, 15:30

The quasar 0827+24 is located more than 30° above the plane of the Galaxy. Radiation coming from its surroundings is only weakly absorbed by the Galaxy, and therefore the reliability of the obtained observational data is fairly high. Spectral studies of the quasar show that:
1. In the radio range, the spectrum is extremely flat (α ≈ 0, F ∼ να), which supports the idea that quasar 0827+24 is...

186. Study of the Quasar 1637+57 and about the Distribution of Quasars Within a Cone of 6° Radius Around It

Vahe Hovhannisyan (https://indico.cern.ch/event/1525866/abstracts/)

27/06/2026, 15:50

The quasar 1637+57 has been studied over a very wide range of the electromagnetic spectrum. Particularly interesting are the data obtained in the radio range, according to which the radio spectral index is close to 0, which is typical for quasars. For the majority of the 11 quasars studied by us, the spectral indices are also close to that of our quasar (Figure 1).
Within a region of 6°...

189. Study of the Distribution of Extragalactic Sources Around the Quasar 1641+39 Within a Radius of 6 Degrees

Artush Sedrakyan

27/06/2026, 16:10

The quasar 1641+39 is a relatively nearby and fairly bright source. In the blue band, it has exhibited variability with a very large amplitude, changing between magnitudes 14.7 and 17.7. Variability is a common phenomenon for quasars; however, a variation of 3 magnitudes is a rather rare event. Taking this variability into account, spectral studies produce the following picture (Fig. 1). From...