A significant number of experimental spectral line shapes studies of various elements were performed in our laboratory. Studies of broadening and shifting along isoelectronic sequences is of a special importance for many applications. In this research area our attention is mainly concentrated on most complex spectral line shape studies like: on simultaneous determination of electron impact width, ion-broadening and ion-dynamic parameter from the shape of plasma broadened non-hydrogenic atom lines, hydrogen spectral lines and lines with forbidden components.

More interested reader is directed to our publication list.

Most of the experimental work on plasma spectroscopy was directed to the application for diagnostics of various plasmas. List goes from astrophysics to laser induced plasmas for nanocomposite creation. In that area we even published several articles with critical reviews of different methods, theirs analysis and ours suggestions for improvement of methods and further research.

We use OES for low temperature plasma in microwave induce plasma, laser-induced plasma (also LIBS) and analysis of hydrogen Balmer lines (and specifically beta line).

The Laboratory is world-known by its research in Stark broadening of spectral lines in plasma, mainly due to work and reputation of the Nikola Konjević, but also due to significant contribution of his PhD students.

N. Konjević, Plasma broadening and shifting of non-hydrogenic spectral lines:Recent status and applications. Physics Reports. (1999); 316, No.6, pp.339-401, DOI.

N.Konjević and J.R.Roberts, A critical review of the Stark widths and shifts of spectral lines from non-hydrogenic atoms, J.Phys.Chem.Ref.Data 5, 209-57 (1976). DOII.

N.Konjević and W.L.Wiese, Experimental Stark widths and shifts for non-hydrogenic spectral lines of ionized atoms (a critrcal review and tabulation of selected data), J.Phys.Chem.Ref.Data 5, 259-308 (1976). DOI

N.Konjević, M.S.Dimitrijević and W.L.Wiese, Experimental Stark widths and shifts for spectral lines of neutral atoms (a critical review of selected data for the period 1976 to 1982), J.Phys.Chem.Ref.Data 13, 619-47 (1984), DOI

N.Konjević, M.S.Dimitrijević and W.L.Wiese, Experimental Stark widths and shifts for spectral lines of positive ions (a critical review and tabulation of selected data for the period 1976 to 1982), J.Phys.Chem.Ref.Data 13, 649-86 (1984), DOI

N.Konjević and W.L.Wiese, Experimental Stark widths and shifts for spectral lines of neutral and ionized atoms (a critical review of selected data for period 1983 through 1988), J.Phys.Chem.Ref.Data 19, 1307-85 (1990), DOI

N.Konjević, A.Lesage, J.R.Fuhr and W.L.Wiese Experimental Stark widths and shifts for spectral lines of neutral and ionized atoms (a critical review of selected data for period 1989 through 2000), J.Phys.Chem.Ref.Data 31, 819-927 (2002). DOI

W.L. Wiese and N. Konjević, Regularities and similarities in plasma broadened spectral line widths. J.Quant.Spectrosc.Radiat.Transfer. (1982); 28, pp.185-98, DOI.

Presentation on laser application (in Serbian Cyrillic).

LAPD methods used in our laboratory are: laser interferometry, laser scattering, shadowgraphy and Schlieren photography. Laser interferometry using He-Ne and CO₂ lasers are mainly used for electron number density diagnostics.

Thomson scattering was performed in collaboration with Polish researchers at their laboratories in Krakow in aluminium and lithium plasma. Laser scattering was performed in our laboratory in combination with shadowgraphy and schlieren techniques to derive parameters of laser produced bubble on a target in a liquid.

LIBS is one of the best analytical techniques for fast, on site analysis of the samples with no sample preparation needed, and especially advantageous for the harsh environments (toxic waste, fusion reactors, Martian environment, etc). Basic physical principles, possible improvements and applications of LIBS are being experimentally investigated in laboratory since 2011, although the interaction of the laser with materials which is the basics of LIBS was investigated in the laboratory quite earlier in the 1980s and 1990s. This renewed interest in the subject was initiated by the collaboration of dr Sonja Jovićević with our external collaborator dr Violeta Lazić (explosive detection, LIBS analysis at Martian conditions, sediments underwater, review article on LIBS in liquids).

Current LIBS related research in the laboratory is:

• physical principles of LIBS in gaseous (review article) and liquid environments (poster)
• on LIBS characteristics enhancement with additional electrical discharge (poster)
• LIBS application for analysis of archaeological samples
• LIBS application for soil composition analysis (poster)

Pulsed laser deposition (PLD) is a laser technique used in our laboratory for a long time for creation of nano-composites. We even call it “a shortcut to novel technologies” due to their possibilities.

This work was presented on 11^th Kongres Fizičara Jugoslavije, 16 ^th National Symposium on Condensed Matter Physics (SFKM) and 15^th Central European Workshop on Quantum Optics. Our most notable publication is “PS-NH2+PMMA-COOH blend: a promising substrate material for the deposition of densely packed gold nanoparticles”.

We are also in cooperation with friends from Bucharest work on Matrix Assisted Pulsed Laser Evaporation, Laser Induced Forward Transport etc.

Note: Work on this subject is currently (but temporally!) stopped due to delay in payment of the turbomolecular pump and vacuum chamber with accessories, approved in 2010 (purchase of capital investment through Project Implementation Unit).