Browsing Zinātniskie raksti (CFI) / Scientific articles by Author "Cipa, Janis"

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    • Luminescence of AlN:Mn2+ materials: Properties and mechanisms 

      Ruska, Rihards; Berzina, Baiba; Cipa, Janis; Trinkler, Laima; Sarakovskis, Anatolijs; Grabis, J.; Steins, I. (Elsevier, 2023)
      Luminescence processes resulting in 600 nm emission of Mn2+ ions in AlN:Mn ceramics were studied based on investigations of photoluminescence and its excitation spectra, luminescence kinetics and long-lasting luminescence ...

    • Luminescence of X-ray induced radiation defects in modified lithium orthosilicate pebbles with additions of titanium dioxide 

      Cipa, Janis; Kizane, Gunta; Supe, Arnis; Zolotarjovs, Aleksejs; Zarins, Arturs; Baumane, Larisa (Lithuanian Academy of Sciences Publishers, 2017)
      Modified lithium orthosilicate (Li4SiO4) pebbles with additions of titanium dioxide (TiO2) are designed as a possible tritium breeder ceramic for the helium cooled pebble bed (HCPB) test blanket module. Additions of TiO2 ...

    • Re-Evaluation of Chromium Doped Alumina for Dosimetric Applications 

      Einbergs, E.; Zolotarjovs, Aleksejs; Bite, Ivita; Cipa, Janis; Vitola, Virginija; Laganovska, Katrina; Trinkler, Laima (De Gruyter, 2021)
      Many medical examinations involve ionizing radiation. Although the range of available dosimeters is rather wide, their linearity and chemical stability are limited. Recently, there has been a growing interest in new, ...

    • Thermoluminescence Response of AlN+Y2O3 Ceramics to Sunlight and X-Ray Irradiation 

      Cipa, Janis; Trinkler, Laima; Berzina, Baiba (De Gruyter, 2021)
      AlN is a wide band gap material with promising properties for dosimetric applications, especially in UV dosimetry. In the present research, the thermoluminescence method is used in order to better understand ...

    • UV light induced processes in pure and doped AlN ceramics 

      Trinkler, Laima; Trukhin, Anatoli; Cipa, Janis; Berzina, Baiba (Elsevier, 2021)
      AlN ceramics samples, pure and doped with Y2O3, Eu2O3 and GaN, and produced from the same AlN powder, were studied for photoelectric effect, photoluminescence spectra and kinetics and thermoluminescence under irradiation ...