Fyzikální ústav AV ČR v.v.i

Project title: Multicomponent garnet scintillators 
Researcher: Karol Bartosiewicz
Supervisor name:Martin Nikl, Co-supervisor: Marco Bettinelli, UNIVR

Project description


Objectives:
To prepare/obtain the undoped, Ce -doped (Gd,Y)3(Al,Ga)5O12 multicomponent garnets in powder, thin film and bulk forms
To characterize their optical, luminescence and scintillation characteristics
To find out relation between chemical composition of the host, the properties measured, technology-specific material defects and scintillation performance/application potential
Tasks and methodology:
 Preparation of materials in the project (AS Prague, UNIVR) and collaborating technological laboratories (Czech Technical univ., and Charles univ, in Prague, Tohoku university in Sendai, Japan). Bulk crystals by flux and micropulling down, thin film by liquid phase epitaxy, powders by solid state sintering, sol gel, Pechini and coprecipitation methods. Fellow will participate in selected technological runs.
Characterization by absorption and time-resolved luminescence spectroscopic studies, thermoluminescence, electron paramagnetic resonance (EPR), scintillation decay and light yield measurements. Evaluation of correlated experiments. Fellow will participate in all the performed experiments and will make all related data evaluation.


Achievemets:


Papers:


1. W. Chewpraditkul, P. Bruza, D. Panek, N. Pattanaboonmee, K. Wantonga, W. Chewpraditkul, V. Babin, K. Bartosiewicz, K. Kamada, A. Yoshikawa, M. Nikl, Optical and scintillation properties of Ce3+-doped YGd2Al5-xGaxO12 (x=2,3,4) single crystal scintillators, J. Lum., 169, (2016), 43-50.
2. I. Carrasco, K. Bartosiewicz, M. Nikl, F. Piccinelli, M. Bettinelli, Energy transfer processes in Ca3Tb2 xEuxSi3O12 (x=0-2), Optical Materials 48 (2015), 252–257.
3. E. Mihóková, V. Babin, K. Bartosiewicz, L.S. Schulman, V. Čuba, M. Kučera, M. Nikl, Low temperature delayed recombination decay in scintillating garnets, Opt. Mater. 40 (2015) 127–131.
4. K. Bartosiewicz, V. Babin, K. Kamada, A. Yoshikawa , M. Nikl, Energy migration processes in undoped and Ce-doped multi-component garnet single crystal scintillators, J. Lum., 166, (2015), 117-122.
5. W. Chewpraditkul, D. Panek, P. Bruza, W. Chewpraditkul, C.  Wanarak, N. Pattanaboonmee, V. Babin, K. Bartosiewicz, K.  Kamada, A. Yoshikawa, M. Nikl, Luminescence properties and scintillation response in Ce3+-doped Y2Gd1Al5-xGaxO12 (x = 2, 3, 4) single crystals, J. Appl. Phys., 116, (2014), 083505-1 - 083505-7.
6. M. Nikl, K. Kamada, V. Babin, J. Pejchal, K. Pilarova, E. Mihokova, A. Beitlerova, K. Bartosiewicz, S. Kurosawa, A. Yoshikawa, Defect Engineering in Ce-Doped Aluminum Garnet Single Crystal Scintillators, Cryst. Growth Des. 14 (2014) 4827 - 4833.



Presentations:

Conference presentations:

1.K. Bartosiewicz, V. Babin, K. Kamada, A. Yoshikawa, J.A. Mares, A. Beitlerova, M. Nikl, "Luminescence Quenching and Scintillation Response in Ce3+ Doped GdxY3-xAl5O12 (x= 0.75, 1, 1.25, 1.5, 1.75, 2) Single Crystals", 13th International Conference on Inorganic Scintillators and Their Applications June 7-12, 2015 Berkeley, California, USA

2.K. Bartosiewicz, V. Babin, M. Nikl, J.A. Mares, Y. Zorenko, V. Gorbenko, "Luminescence and Energy Transfer Processes in (Lu,Tb)3Al5O12 Single Crystalline Films Doped with Ce3+", 9th International Conference on Luminescent Detectors and Transformers of Ionizing Radiation  September 20-25, 2015 Tartu, Estonia



LUMINET meetings :

LUMINET Seminar, 19 July 2014, Wrocław, Poland
LUMINET Autumn Meeting, September 2014, Ausburg, Germany
LUMINET Spring Meeting, 3-6 March 2015, Verona, Italy
LUMINET Autumn Meeting, 25 September 2015, Tartu, Estonia
LUMINET Spring Meeting, 21-22 March, Aveiro, Portugal
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