Transcript katedra.ppt

Charles University in Prague
Faculty of Mathematics and Physics
Ke Karlovu 3, 121 16 Praha 2
Internal Structure
School of Informatics,
School of Mathematics,
School of Physics,
Astronomical Institute of Charles University
Institute of Physics of Charles University
Laboratory of General Physics Education
Department of Physics Education
Department of Surface and Plasma Science
Department of Physics of Materials
Department of Low Temperature Physics
Department of Condensed Matter Physics
Department of Macromolecular Physics
Department of Geophysics
Department of Chemical Physics and Optics
Institute of Particle and Nuclear Physics
Department of Meteorology and Environment Protection
Institute of Theoretical Physics
Department of Low-Temperature Physics
Groups
Radiofrequency Spectroscopy Group
Spin Physics Group
Positron Annihilation
Low-Temperature Physics and Techniques Group
KRYO
Joint Low Temperature Laboratory (JLTL)
Mössbauer Spectroscopy Group
Superfluidity Group
Superconductivity Group
Low
Temperature
Department
founded
(1. 9. 1981)
August
2002…
NMR in 2002
VIII. 2002
Spectrometer NMR
IX. 2002
NMR Lab
New Cryohall, opened in 2005
Joint Low Temperature Laboratory (JLTL)
Mössbauer Spectroscopy Group
Superfluidity Group
Superconductivity Group
Positron Annihilation Group
γ-quantum
1,27 MeV
positron lifetime t
PAS/LT
γ
0,511 MeV±∆E
∆E ≈ cpL/2
PAS/DB
≈0,1 mm
Positron
22Na
Thermalisation
(tth≈10-11 s)
Diffusion
(L+≈100 nm)
Sample
PAS/AC
∆θ ≈ pT/m0c
1500 l
Liquid He
Storage
Vessel