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SUMMARY:Dependence of the spectral and luminescent properties of polymethy
 l methacrylate on its molecular weight
DTSTART;VALUE=DATE-TIME:20200715T072000Z
DTEND;VALUE=DATE-TIME:20200715T074000Z
DTSTAMP;VALUE=DATE-TIME:20260909T102247Z
UID:indico-contribution-1888@indico.inp.nsk.su
DESCRIPTION:Speakers: G.A. Lyubas (ISSCM SB RAS)\nA line of polymethylmeth
 acrylate (PMMA) samples was synthesized using synchrotron radiation of the
  VEPP-3 accelerator and the high-energy electron beam of the ILU-6 acceler
 ator. The study was carried out during the in situ synthesis of PMMA in th
 e recording of luminescence spectra and their kinetics. An experimental st
 udy was also made of the luminescence of PMMA samples with a molecular wei
 ght in the range 0.2 · 10^6 - 6 · 10^6 under excitation by an SR beam in
  the range of 3 - 60 keV. It was found that with an increase in the molecu
 lar weight of PMMA\, the maximum of the luminescence band of PMMA shifts t
 oward the long-wavelength direction (redshift)\, and the luminescence deca
 y time decreases. An increase in the luminescence bandwidth with increasin
 g molecular weight is also observed. These effects are explained by the or
 dering of the polymer structure and increase in density\, which leads to a
  decrease in interatomic distances and\, consequently\, to a shift in elec
 tronic levels and a change in their width.\nThis work was supported by RFB
 R grants 19-29-12045\, 16-29-01050\, 14-03-00770 and the Ministry of Scien
 ce and Education of Russia grant AAAA-A17-117030310280-6.\n\nhttps://indic
 o.inp.nsk.su/event/24/contributions/1888/
LOCATION:Zoom Zoom 860 5034 1820
URL:https://indico.inp.nsk.su/event/24/contributions/1888/
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