SMuK 2023 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
HK: Fachverband Physik der Hadronen und Kerne
HK 13: Instrumentation IV
HK 13.2: Vortrag
Dienstag, 21. März 2023, 17:15–17:30, SCH/A251
Systematic Studies of Radiation Damage and Stimulated Recovery of PWO — •Pavel Orsich, Valery Dormenev, Hans-Georg Zaunick, Markus W. H. Moritz, Rainer W. Novotny, and Kai-Thomas Brinkmann — II. Physikalisches Institut, Justus-Liebig-Universität, Gießen
Degradation of the optical transmittance of lead tungstate (PWO) scintillation crystals
in the luminescence spectrum under ionizing radiation leads to loss of the light output,
which results in the deterioration of the energy resolution.
Stimulated recovery allows to restore the optical transmittance losses and is achieved by inducing
photons of different wavelengths via external light sources (laser diode, LED).
Here we report on new results of studies on the stimulated
recovery and the radiation damage under gamma irradiation cooled
down and at room temperature of lead tungstate crystals. It includes light output and
transmittance degradation of PWO, correlations between
variations of transmittance at 420 nm and the radiation induced
absorption coefficient. Moreover, we present the first lab experiment results of in-situ recovery of the PWO optical transmittance during
radiation period3.
We also propose the model of the radiation damage and the stimulated
recovery of damaged PWO after gamma irradiation as well as spontaneous recovery.
This work is supported by BMBF, GSI and HFHF.