1 / 34

INSTITUTE of SOLID STATE PHYSICS Founded 1972 18 Laboratories and Theoretical Department

INSTITUTE of SOLID STATE PHYSICS Founded 1972 18 Laboratories and Theoretical Department Staff - 180, Scientific staff - 100 In the field of atomic and plasma physics 1.Optics and Spectroscopy 2. Atomic Spectroscopy 3. Metal Vapour Lasers. Laboratory Atomic Spectroscopy

dextra
Download Presentation

INSTITUTE of SOLID STATE PHYSICS Founded 1972 18 Laboratories and Theoretical Department

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. INSTITUTE of SOLID STATE PHYSICS Founded 1972 18 Laboratories and Theoretical Department Staff - 180, Scientific staff - 100 In the field of atomic and plasma physics 1.Optics and Spectroscopy 2. Atomic Spectroscopy 3. Metal Vapour Lasers

  2. Laboratory Atomic Spectroscopy 1. Employment of HCD for analytical investigations – analyses of layer-by-layer surface of the complex material.- Dr. V. Mihailov 2. Investigation of plasma electron spectroscopy and applications – Dr. P. Pramatarov, Dr. M. Stefanova 3. Atomic constants, atomic spectroscopy and application – Prof. K. Blagoev 4. Quantum optics – Dr. E. Dimova

  3. Atomic structure, atomic constants G. MalchevaK. Blagoev

  4. Experimental methods for lifetimes and transition probabilities determination • Radiative lifetimes • - time evolution of the population • * Beam foil/laser • * time resolved method with: • ++ electron excitation • ++ laser excitation ( LIF) • width of the excited states • + Hanle method Transition probabilities – branching fractions I = 1/Aik Aik = (1/i)(Ii/Ij)

  5. Radiative lifetimes of excited states • - time evolution of the population • * Beam foil/laser • * time resolved method with: • ++ electron excitation • ++ laser excitation ( LIF) • width of the excited states • + Hanle method

  6. Motivation • Obtaining new information about atomic structure and radiative properties; • New or more precise data for radiative lifetimes and transition probabilities in application for: laser physics, plasma physics and especially for astrophysics • Verification of theoretical methods

  7. List of the investigated atomic spectra Radiative lifetimes of high lying excited states of NeII,ArII,KrII,XeII – delayed coincidence method with pulsed electron excitation - Radiative lifetimes and transition probabilities of atoms and ions of IIB, IIA group Hg I - LIF and DC methods and HF calculations, Hg II - Delayed coincidence method with electron excitation, Hg III – Delayed coincidence method, Cd I, II - LIF method, HF calculation, branching ratio, Cd III - Delayed coincidence method with electron excitation, Zn I, I – LIF method and HF calculations, AgII, CuII – transition probabilities, branching ratio Radiative lifetimes of some transition elements Zr I, Zr II, III – LIF method and HF calculation Hf I, Hf III – LIF method and HF calculation Nb I LIF, calculations YI, Y III LIF, calculations Tb I , LIF in progress

  8. VACUUM SYSTEM GAS INLET POWER SUPPLY ELECTRON GUN MONOCHROMATOR PMP Dt=10 ns AMPLIFIER GENERATOR TIME – AMPLITUDE CONVERTOR AMPLIFIER PC ADC CAMAC

  9. Table 2. Radiative Lifetimes of n3P states of HgI(ns) • K. Blagoev et al Proc SPIE,v5226, 164(2002), Proc. EGAS34,186(2002) • E. Alipieva et al Opt. Sprctr. 43,529(1977); • 3. W. J. Alford et al Phys. Rev A36, 641(1987); • 4. P. Hafner et al J. Phys. B 11, 2975(1978)

  10. Table 1. Radiative Lifetimes of np1P states of HgI(ns). 1. K. Blagoev et al proc. SPIE, v. 5256,164(2002); 2. G. C. King et al J. Phys. B B8, 365(1975); 3. W. J. Alford et al Phys. Rev A36, 641(1987); 4. E. H. Pinnington et al Canadian J of Physics, 66, 960(1988); 5. T. Anderson et al JQSRT 13,369(1973); 6. P. Hafner et al J. Phys. B 11, 2975(1978)

  11. Table 1a. Radiative Lifetimes of np P states of HgI(ns). • K.Blagoev et al Proc. SPIE, v4397, p. 256

  12. Nd:YAG laser (B) Dye laser KDP BBO SBS compressor Trigger Side view Delay generator Ablation laser Nd:YAG laser (A) Helmholtz coil Computer Rotating Zr target Trigger Top view MCP PMT Transient Digitizer Monochromator Time Resolved Laser Induced Fluorescence Equipment in Lund Laser Centre

  13. H2 Pelin-Brocaprism Lens Lens Raman cell Generation of necessary frequencies using second, third harmonic and Stokes and anti-Stokes Raman components.

  14. List of the investigated atomic spectra Radiative lifetimes of high lying excited states of NeII,ArII,KrII,XeII – delayed coincidence method with pulsed electron excitation - Radiative lifetimes and transition probabilities of atoms and ions of IIB, IIA group Hg I - LIF and DC methods and HF calculations, Hg II - Delayed coincidence method with electron excitation, Hg III – Delayed coincidence method, Cd I, II - LIF method, HF calculation, branching ratio, Cd III - Delayed coincidence method with electron excitation, Zn I, I – LIF method and HF calculations, AgII, CuII – transition probabilities, branching ratio Radiative lifetimes of some transition elements Zr I, Zr II, III – LIF method and HF calculation Hf I, Hf III – LIF method and HF calculation Nb I - LIF, calculations YI, Y III - LIF, calculations Tb I - LIFin progress

  15. Table 1. Radiative Lifetimes of Zr III excited levels (data in ns). Table2. Excitation schemes R. Mayo, J. Campos, M. Ortiz, H. Xu, S. Svanberg , G. Malcheva and K. Blagoev Eur. Phys. J: D40,169,2006.

  16. A typical experimental time-resolved signal from the 53647.21 cm−1 level in Zr III.

  17. Experimental methods for lifetimes and transition probabilities determination • Radiative lifetimes • - time evolution of the population • * Beam foil/laser • * time resolved method with: • ++ electron excitation • ++ laser excitation ( LIF) • width of the excited states • + Hanle method Transition probabilities – branching fractions I = 1/Aik, Aik = (1/i)(Ii/Ij)

  18. Принцип на действие на лазерно-индуцираната спектроскопия (LIBS)

  19. Nd-YAG Laser Monochromator Photodetector Oscilloscope Delay Amplifier OMA III Computer Transition probabilities - LIBS Laser parameters: 1064 nm, 20 Hz, t = 7 ns, E = 240 mJ.

  20. Time dependence of Au I and Au II spectra

  21. LIBS in archaeology

  22. Nd:YAG laser (Quanta Ray GC3),λ = 1064 nm E = 700-800 mJ T≈ 10 ns; 10 Hz Eschelle spectrometer (Mechelle 5000) Sample

  23. Spectrum from silver sample obtained by Meshele 5000

  24. LIBS in Art

  25. LIBS

  26. J. Campos, M. Ortiz,R. Mayo - Universidad Complutense de Madrid, Spain; • H. L. Xu, S. Svanberg, L. Engstr¨om, H. Lundberg - Lund Institute of Technology, Lund, Sweden • - H. Nilsson - Lund Observatory, Lund, Sweden • E. Biémont, P. Quinet, V. Fivet - Université de Liège, Liège 1, Belgium • P. Palmeri - Astrophysique et Spectroscopie, - Universit´e de Mons– UMONS, Mons, Belgium • Acknowledgements • Laser lab in Europe • Bulgarian National Science Foundation

  27. Thank you

More Related