Ivars TALE  

Professor Ivars Tale  Head of the Department of Crystal Physics  Institute of Solid State Physics  University of Latvia  Kengaraga iela 8  Riga, LV 1063  Latvia  Phone: +371 7 260639  Fax:     +371 7 112583  E-mail:  iatale@com.latnet.lv

Interests:

• Wide-gap solid state physics
• Radiation energy storage and read-out processes in solids
• Physics of thin isolator and semiconductor films
• Radiation memory and optoelectronics material science

Languages:  German, English, Russian, Latvian

Education

• University of Latvia (Faculty of Physics and Mathematics), 1959
• Dr.phys. (Candidate of Science in former USSR, Ph.D. in Western countries), University of Latvia, 1974
• in Physics and Mathematics, Academy of Sciences of Latvia, 1982
• Dr. habil. phys. (Doctor of Science in former USSR), University of Latvia, 1982
• Professor of solid state physics, Supreme Attestation Comission of the former USSR system, 1987
•  

Experience

University of Latvia:

• Researcher, Laboratory of Semiconductor Physics, 1959 - 1971
• Head, Scientific group,  Laboratory of Semiconductor Physics, 1971 - 1978
• Head,  Department of Crystal Physics, Institute of Solid State Physics, 1979-
• Professor of solid state physics, Faculty of physics and mathematics, 1991-  

Honours

• Corresponding Member, Latvian Academy of Sciences, 1993-1996
• Full Member, Latvian Academy of Sciences, 1996

 

Professional Activities and Memberships:

• Chairman, Promotion and Habilitation Council for Physics, University of Latvia, 1991-
• Member, Latvian Council of Science Expert Coommission for Physics, Mathematics and Astronomy
• Member, Physical Society of Russia, 1990
• Member (President 1992 - 1994), Physical Society of Latvia,
• Member, Latvian Union of Scientists, 1989
• Visiting scientist, Institute of Physics, Charles University, Prague, Czechoslovakia, 1974, 1978, 1983, 1986
• Visiting scientist, Department Physics University Rostock, FRG (inc. former DDR) , 1973, 1981, 1985, 1995, 1996, 1997
• Visiting Scientist, University of Prama, Italy, 1988
• Visiting Scientist, University  GH Paderborn, Germany, 1993, 1994
• Visiting professor, Institute of Physics, University Sonora, Mexico, 1994-1995

   

Lectures:

A series of guest lectures at the universities and scientific centres in CSSR (1974, 1978, 1983, 1986);; Germany (1973, 1981, 1985, 1995, 1996, 1997)

 

Courses:

• Solid state physics (for BS, MS), Technology of  experiment in physics  (for BS), Thermal physics (MS),  University of Latvia
• Physics of ionic crystals,  Solid state radiation physics PhD students in solid state physics, University of LatviaI
• Director of bachelor studies: specialization "Information technologies in physics"

 

Recent/Representative Publications:
 
     Tale I., Kulis P., Rogulis U., Trokss J., Veispals A., Barboza-Flores M.  Color centers in LiBaF3. - J. Luminescence, 1997, 72-74, p.722-723.
     Springis M., Tale V., Tale I. Nature of the blue luminescence bands in PbWO4. - J. Luminescence, 1997, 72-74, p.784-785.
    Tale I. and Rudlof G. Advanced trap spectroscopy in a-Al2O3 by TSL and TSEE. Proceedings of the 12-th Internat. Symposium ‘’12EEEA’97’’ (in press)
    Kulis P., Springis M. and Tale I. The thermal quenching of the F-centre luminescence. Radiation Measurements, 1997 (in press).
    Rogulis U., Trokss J., Tale I. and Nagornaya V. EPR of molybdenum-related defect in CdWO4 crystals. Radiation Measurements, 1997 (in press).
    Springis M., Kulis P. and Tale I. Polarised blue luminescence in PbWO4 and CaWO4 crystals under polarised UV-excitation. Radiation Measurements, 1997 (in press).
    Tale I., Springis M., Kulis P., Rogulis U., Trokss J., Veispals A., and Fitting H.-J. Radiation defects and processes in LiBaF3 crystals. Radiation Measurements, 1997 (in press).
    Visocekas R., Tale V., Zink A. and Tale I. Trap spectrscopy and tunnelling luminescence in feldspars. Radiation Measurements, 1997 (in press).

    Rogulis U., Troksh J., Veispals A., Kulios P., Springis M., Tale I. and Fitting H.-J., Degradation features of BaF2 scintillators under radiation and magnetic fields. - Phys. Stat. Sol. (a),  1996, 156, p.515-522.
    Visocekas R., Tale V., Zink A., Spooner N.A. and Tale I. Trap Spectroscopy and TSL in Feldspars, Radiat. Protection. Dosim., vol.66, pp.391-4, 1996.
    Tale I., Rudlof G. and Tale V. Glow Rate Technique for Spectroscopy of Complex Thermostimulated Relaxation Processes, Radiat. Protection. Dosim., vol.65, pp.33-6, 1996.
    Springis M, Kulis P., Veispals A., Tale V. and Tale I. Origin of the Dosimetric 430K TL Peak in the Thermochemically Reduced a-Al2O3, Radiat. Protection. Dosim., vol.65, pp. 231-4,1996.
    Tale I., Piters T.M., Barboza-Flores M., Perez-Salas R. and Springis M. Optical Properties of Complex Anion Vacancy Centers and Photoexcitted Electronic Processes in Anion Deficient a-Al2O3, Radiat. Protection. Dosim., 1996,  p.231-5.
    Kotomin E.A. Stasahns, A., Kantorovich L.N., Lifshitz A.I., Popov A., Tale I. - Calculations of the geometry and optical properties of FMg and dimer (F2 -type) centers in corundum crystals, Phys Rev., 1995,vol. B51,No14,pp.8770-78 .
    Rogulis U.,Tale I., Hangleiter T. and Spaeth J.-M., Photostimulation process in the x-ray storage phosphor KBr:In, J.Phys.Condens.Matter.1995,vol 7, pp.3129-3137.
    Tale V., Tale I. and Nagornaya L.L. Thermoactivated Spectroscopy of Hetrovalent Impurity Traps in CdWO4, Radiat. Effects Defects Sol, 1995, vol. 134, pp.477-480.
    Springis M., Kulis P. and Tale I. Point defects related to 260K tThermostimulated Luminescence in a-Al2O3,  Radiat. Effects Defects Sol, 1995, vol. 134, pp.481-4.
    Rogulis U., Trokss J., Veispals A., Tale I., Kulis P. and Springis M. ODMR of Cd Impurity Centers in g-Irradiated BaF2 Crystals, Radiat. Effects Defects Sol, 1995, vol. 135, pp.361 - 5.
    Rogulis U., Spaeth J.-M., Tale I. and Ruzha E. ODEPR of Indium Colour Centers in the X-Irradiated Storage Phosphor KBr:In, Radiat. Effects Defects Sol, 1995, vol. 134, pp.471 - 5.
Jacobs P.W.M., Kotomin E.A., Stashans A and Tale I. Theoretical simulations of hole centres in corundum crystals, Modelling Simul. Mater. Sci. Eng. 1994, vol.2, p.109-117
    I.Tale, V.Tale, P.Kulis. The effect of ionic movementn on TSL in TLD LiF- Mg, Ti. - Radiation Protection Dosimetry, 1993, vol. 47, No 1/4, pp.107-110.
    Tale I. Thermostimulated Processes in Statically and Dynamically Disordered Luminescent Solids. - Nucl. Tracks Radiat. Meas., 1993, V.21, No.1, p. 65-71.
    Jacobs P.W.M., Kotomin E.A., Stashans A. and Tale I.A. Mechanism of self-trapped hole motion in corundum crystals. Philosopical Mag. B, 1993, vol.67, No.4, p.557-567
    Jacobs P.W.M., Kotomin E.A., Stashans A., Stefanovich E.V. and Tale I.  Quantum chemical simulations of hole self-trapping in corundum. - J.Phys.: Condens. Matter 1992, v.4, pp. 7531-7544.
    Jacobs P.W.M., Kotomin E.A., Stashans A., Tale I. Mechanism of Self-Trapped Hole Motion in Corundum Crystals. -Phil.Mag. B, 1992 ,V.67, No.4, 557-67.
    Tale I. Thermostimulated Processes in Dynamically Disordered Ionic Crystals. - Radiat Effects and defects in Solids, 1991, Vols. 119-121, pp.99-104.

"Models of processes in wide- gap solids with defects" (L.Kantorovich, E.Kotomin, V.Kuzovkov, I.Tale, A.Shluger, Yu.Zakis) Zinatne Publishing House: Riga, 1991, 320 p.

Research Projects:

• • Head, Research grant "Recombination mechanisms of electronic excitations in new binary and thernary optical materials", supported by Latvian Council of Science, 1997-2000.
  • Co-ordinator of the National Programme "New advanced materials for microelectronics and photonics: synthesis, research and development. Subprogramm "Technology of the Al-Ga nitride thin film heterostructures", supported by Latvian Council of Science, 1997-2000.
  • Co-ordinator of the Joint research project : "Magneto-optische Spinresonanz zur Defektspektroskopie in Fluorperovskiten mit dem Einsatzziel als Strahlungs-Speichermaterialien" (Germany-Latvia), supported by DFG grant, beginning 1998.

 Family

Last update 04.01.1998