Ljubinko Ignjatović's Site

Dr Ljubinko Ignjatović

Research Professor

Institute of Physics

Laboratory for Physics of Nonideal Plasma

P. O. Box 57

11001 Beograd

Serbia

Phone: +381 11 3713137

Fax: +381 11 3162190

Mob: +381 64 3649326

ljubinko.ignjatovic@phy.bg.ac.rs

ljuba@ipb.ac.rs

ljubai@sbb.rs

Key Research Expertise

· Modelling and Simulation

* kinetics of atomic and molecular processes in low temperature both laboratorial and astrophysical plasmas

* dynamics of atomic collisions

* molecular dynamics

* ion beam and collinear laser beam interaction (in the frame of consideration of new kind of mass spectrometer)

* moving of ions in RF electromagnetic field – ion trap simulation

· Numerical Methods/Techniques

* solving ordinary differential equations (developed the computer program for solving Schrodinger equation with an arbitrary potential)

* solving linear and non-linear algebraic and integral equations

* solving eigen value problems

* solving ill posed problems

* making and using of Monte Carlo simulations

· Programming Skills

* FORTRAN 77, FORTRAN 90, C and Visual Basic using PCs and UNIX-based work stations

Research interest

* Developed the method for the calculations of the wave functions and the molecular terms for the ground and several excited electronic states of quasi-one-electron molecular ions, such as Hli⁺, HNa⁺, Li2⁺, Na2⁺,LiNa⁺, ...etc. Besides, the dipole matrix element for the transitions between these states has been successfully calculated.

* Considered two classes of atomic processes (quasi-static and pure quantum mechanical approach):

- the radiative ion-atom processes: photoassociation, photodissociation and radiative charge exchange;

- the processes of chemi-ionozation during the atom-Rydberg atom collisions:asociative ionization and Penning ionization.

* Investigated the influence of these processes on the the kinetics of low temperature, both laboratory and astrophysical, plasmas.

*Developed the model of fluorescence caused by interaction of ion beam with a collinear laser beam.

* Developed programme for simulation of ion trap.

Employment history

* Institute of Physics, Belgrade, Principal Research Fellow, Institute of Physics, 2009

* Institute of Physics, Belgrade, Senior Research Associate, Institute of Physics, 2005-2009

* Institute of Physics, Belgrade, Research Associate, Institute of Physics, 2002-2005

* Loughborough University, UK, Research Fellow, Department of Chemistry, 2001, 2002

* University of Belgrade, Research Associate, Institute of Physics, 1997-2000

* University of Belgrade, Belgrade, Research Assistant, Institute of Physics, 1992-1997

* University of Belgrade, Belgrade, Research Trainee, Institute of Physics, 1987-1992

Education and Qualifications

Education: 1978 - 1986, Faculty of Physics, Belgrade/Yugoslavia, BSc

1987 - 1992, Institute of Physics, Belgrade/Yugoslavia, MSc

MSc Thesis: "Elastic electron-excited atom scattering in plasma"

1992 - 1997, Institute of Physics, Belgrade/Yugoslavia, PhD

PhD Thesis: "The contribution to the theory of ion-atom and atom-atom collisions in plasma"

Languages: English, Russian

List of Publications in International Journals:

Lj. M. Ignjatović, A. A. Mihajlov, N. M. Sakan, M. S. Dimitrijević and A. Metropoulos, “The total and relative contribution of the relevant absorption processes to the opacity of DB white dwarf atmospheres in the UV and VUV regions”, Monthly Notices of the Royal Astronomical Society 396 (4), pp. 2201-2210, (2009)

doi: 10.1111/j.1365-2966.2009.14870.x

Cited by …

A. A. Mihajlov, Y. Vitel and Lj. M. Ignjatović, “The new screening characteristics of strongly non-ideal and dusty plasmas. Part 3: Properties and Applications”, High Temperature, 47, No. 2, 163-174, (2009)

DOI: 10.1134/S0018151X09020011

Cited by

А. А. Михайлов, И. Витель, Л. М. Игнатович, “НОВЫЙ СПОСОБ ОПИСАНИЯ ЭКРАНИРОВАНИЯ В СИЛЬНО НЕИДЕАЛЬНОЙ И ПЫЛЕВОЙ ПЛАЗМЕ. ЧАСТЬ 3. СВОЙСТВА И ПРИЛОЖЕНИЯ”, Теплофизика высоких температур, 47, No. 2, 163-174, (2009)

DOI: 10.1134/S0018151X09020011

PII: S0018151X09020011

A. A. Mihajlov, Y. Vitel and Lj. M. Ignjatović, “The new screening characteristics of strongly non-ideal and dusty plasmas. Part 2: Two-Component Systems”, High Temperature, 47, No. 1, 5-16, (2009)

DOI: 10.1134/S0018151X09010015

Cited by

А. А. Михайлов, И. Витель, Л. М. Игнатович, “НОВЫЙ СПОСОБ ОПИСАНИЯ ЭКРАНИРОВАНИЯ В СИЛЬНО НЕИДЕАЛЬНОЙ И ПЫЛЕВОЙ ПЛАЗМЕ. ЧАСТЬ 2. ДВУХКОМПОНЕНТНЫЕ СИСТЕМЫ”, Теплофизика высоких температур, 47, No. 1, 5-16, (2009)

DOI: 10.1134/S0040364409010013

PII: S0040364409010013

A. A. Mihajlov, Y. Vitel and Lj. M. Ignjatović, “The new screening characteristics of strongly non-ideal and dusty plasmas. Part 1: Single-Component Systems”, High Temperature, 46, No. 6, 737-745, (2008)

DOI: 10.1134/S0018151X08060011

Cited by

А. А. Михайлов, И. Витель, Л. М. Игнатович, “НОВЫЙ СПОСОБ ОПИСАНИЯ ЭКРАНИРОВАНИЯ В СИЛЬНО НЕИДЕАЛЬНОЙ И ПЫЛЕВОЙ ПЛАЗМЕ. OДНОКОМПОНЕНТНЫЕ СИСТЕМЫ”, Теплофизика высоких температур, 46, No. 6, 805-813, (2008)

DOI: 10.1134/S004036440806001X

PII: S004036440806001X

B. L. Sharp, Lj. M. Ignjatović and P. S. Goodall, “Inductively coupled plasma mass spectrometry, coincidence laser spectroscopy (ICP-MS-CLS), simulation of the transmission efficiency of a 3D quadrupole ion trap for cooling energetic ions from the ICP prior to optical detection”, J. Anal. At. Spectrom., 23, 985-991, (2008)

DOI: 10.1039/b800035b

Cited by …

Lj. M. Ignjatović, A. A. Mihajlov and A. N. Klyucharev, “The rate coefficients of the chemi-ionization processes in slow Li*(n)+Na collisions”, J. Phys. B: At. Mol. Opt. Phys., 41, 025203 (7pp), (2008)

DOI:10.1088/0953-4075/41/2/025203

Cited by

A. A. Mihajlov, Lj. M. Ignjatović, V.A. Srećković and Z. Djurić, “The influence of (n-n′)-mixing processes in He*(n)+He(1s²) collisions on He*(n) atoms’ populations in weakly ionized helium plasmas”, JQSRT, 109, 853-862, (2008)

DOI:10.1016/j.jqsrt.2007.09.005

Cited by

B. L. Sharp, P. S. Goodall, Lj.M. Ignjatović, H. Teng, “Coincidence laser spectroscopy (CLS) for the detection of ions in ICP-MS (ICP-MS-CLS). A feasibility study.”, J. Anal. At. Spectrom., 22, 1447 – 1470, (2007)

DOI: 10.1039/b707394c.

Cited by 1

A. A. Klyucharev, N. N. Bezuglov, A. A. Metveev, A. A. Mihajlov, Lj. M. Ignjatović and M. S. Dimitrijević , “Rate coefficients for the chemi-ionization processes in sodium- and other alkali-metal geocosmical plasmas”, New Astronomy Reviews, 51/7, pp. 547-562, (2007),

DOI: 10.1016/j.newar.2007.05.001

Cited by

A. A. Mihajlov, D. Jevremović, P. Hauschildt, M. S. Dimitrijević, Lj. M. Ignjatović and F. Alard, “Influence of chemi-ionization and chemi-recombination processes on hydrogen line shapes in M dwarfs”, Astronomy and Astrophysics, 471, p. 671-673, (2007)

DOI: 10.1051/0004-6361:20077517

Cited by

A. A. Mihajlov, Lj. M. Ignjatović, N. M. Sakan, and M. S. Dimitrijević, “The influence of H₂⁺ - photo-dissociation and (H + H⁺)- radiative collisions on the solar atmosphere opacity in UV and VUV regions”, Astronomy and Astrophysics, 469, p. 749-754, (2007)

DOI: 10.1051/0004-6361:20077206

Cited by

Lj.M. Ignjatović and A.A. Mihajlov, “Rate coefficient for the chemi-ionization in slow Li^*(n)+Li and Na^*(n)+Na collisions”, Phys. Rev. A, 437, 022715, (2005).

DOI: 10.1103/PhysRevA.72.022715

Cited by

A.A. Mihajlov, Lj.M. Ignjatović and M.S. Dimitrijević, "Processes of (n-n’)-mixing in collisions of Rydberg H^*(n) atoms with H(1s) in the Solar atmosphere", Astronomy and Astrophysics, 437, p. 1023-1027, (2005).

DOI: 10.1051/0004-6361:20052694

Cited by 1

A. A. Mihajlov, Lj. M. Ignjatović, Z. Djurić and N. N. Ljepojević, “The rate coefficients for the processes of (n-n’)-mixing in collisions of Rydberg atoms H^*(n) with H(1s) atoms”, J. Phys. B: At. Mol. Opt. Phys. 37, 4493–4506, (2004).

DOI: 10.1088/0953-4075/37/22/008

Cited by 1

A. A. Mihajlov, A. M. Ermolaev, Lj. M. Ignjatović and N. M. Sakan, “Radiative charge exchange in ion–atom collisions at intermediate impact velocities: spectral characteristics and possibilities of experimental studies”, J. Phys. B: At. Mol. Opt. Phys. 37, 3563–3569, (2004).

DOI: 10.1088/0953-4075/37/18/001

Cited by

A. A. Mihajlov, A. M. Ermolaev, and Lj. M. Ignjatović, “H⁺+H(1s) collisions at intermediate impact velocities as a new source of UV and VUV radiation”, Astronomy and Astrophysics., 419, 1–5 (2004).

DOI: 10.1051/0004-6361:20040040

Cited by 1

A. Mihajlov, Lj. M. Ignjatović, M. S. Dimitrijević and Z. Djurić, “Symmetrical chemi-ionization and chemi-recombination processes in low temperature layers of helium-rich DB white dwarf atmospheres”, The Astrophysical Journal Supplement Series, 147, 369–377, (2003).

DOI: 10.1086/375621

Cited by 3

A.A. Mihajlov, D. Jevremović, P. Hauschildt, M.S. Dimitrijević, Lj.M. Ignjatović and F. Alard, "Influence of chemi-ionization and chemi-recombination processes on the population of hydrogen Rydberg states in atmospheres of late type dwarfs", Astronomy and Astrophysics, 403, p.787-791, (2003).

DOI: 10.1051/0004-6361:20030463

Cited by 5

A.A. Mihajlov, D. Jevremović, Lj.M. Ignjatović, P. Hauschildt and M.S. Dimitrijević "The influence of chemical ionization and chemical recombination processes on the plasma parameters in low temperature layers of stellar atmospheres", Astronomical and Astrophysical Transactions, 22, Nos. 4-5, p.513-517, (2003).

DOI: 10.1080/1055679031000136445

Cited by

Lj.M. Ignjatović and A.A. Mihajlov, "The realization of Abel's inversion in the case of discharge with undetermined radius", JQSRT, 72/5, p.677-689, (2002).

DOI: 10.1016/S0022-4073(01)00149-2

Cited by 3

A.A. Mihajlov, M.S. Dimitrijević, Lj.M. Ignjatović and M.M. Vasilijević, "Chemi-ionization and chemi-recombination processes in astrophysical plasmas", Astronomical and Astrophysical Transactions, 18, p.145-149, (1999).

DOI:10.1080/10556799908203047

Cited by

Lj.M. Ignjatović and A.A. Mihajlov, "Interaction of electrons with atoms in ground and excited states: potential of interaction, momentum transfer cross-sections", Contrib. Plasma Phys., 37, p.309-326, (1997).

DOI: 10.1002/ctpp.2150370404

Cited by 2

A.A. Mihajlov, Lj.M. Ignjatović, M.M. Vasilijević and M.S. Dimitrijević, "Processes of H-H⁺-e and H₂⁺-e recombination in the weakly-ionized layers of the Solar atmosphere", Astronomy and Astrophysics, 324, p.1206-1210, (1997).

Bibliographic Code:1997A&A...324.1206M

Cited by 3

A.A. Mihajlov, M.S. Dimitrijević, Lj.M. Ignjatović and Z. Djurić, "Radiative He⁺ + He(1s²) processes as the source of the DB white dwarf atmosphere EM-continuous spectra", Astrophysical Journal, 454, p.420-428, (1995).

DOI: 10.1086/176493

Cited by

A.M. Ermolaev, A.A. Mihajlov, Lj.M. Ignjatović and M.S. Dimitrijević, "Continuous emission due to radiative ion-atom association and charge exchange in weakly ionized plasmas of H, He, Li and Na", J. Phys. D: Appl. Phys., 28, p. 1047-1057, (1995).

DOI:10.1088/0022-3727/28/6/005

Cited by 3

A.A. Mihajlov, M.S. Dimitrijević and Lj.M. Ignjatović, "The influence of ion-atom radiative collisions on the continuous optical spectra in helium-rich DB white-dwarf atmospheres", Astronomy and Astrophysics, 287, p. 1026-1028, (1994).

Bibliographic Code:1994A&A...287.1026M

Cited by

A.A. Mihajlov, M.S. Dimitrijević, Lj.M. Ignjatović and Z. Djurić, "Spectral coefficients of emission and absorption due to ion-atom radiation collisions in Solar atmosphere", Astronomy and Astrophysics. Suppl. Ser., 103, p. 57-66, (1994).

Bibliographic Code:1994A&AS..103...57M

Cited by

A.A. Mihajlov, A.M. Ermolaev, Z. Djurić and Lj.M. Ignjatović, "Static electrical conductivity in weak and moderately non-ideal plasmas", J. Phys. D: Appl. Phys., 26, p. 1041-1047, (1993).

DOI: 10.1088/0022-3727/26/7/005

Cited by 8

A.A. Mihajlov, M.S. Dimitrijević and Lj.M. Ignjatović, "The contribution of ion-atom radiative collisions to the opacity of the Solar atmosphere",Astronomy and Astrophysics, 276, p. 187-192, (1993).

Bibliographic Code:1993A&A...276..187M

Cited by 2

List of Publications at International Conferences:

A. A. Mihajlov, D. Jevremović, P. Hauschildt, M. S. Dimitrijević, Lj. M. Ignjatović, F. Allard, “The influence of chemi-ionization and chemi-recombination processes on H lines in M dwarf atmospheres”,2007 AIP Conference Proceedings 938, pp. 214-217

A. N. Klyucharev, N. N. Bezuglov, A. A. Matveev, A. A. Mihajlov, Lj.M. Ignjatović, M. S. Dimitrijević, “Chemi-ionization processes. Alkali-metal geocosmical plasmas”, 2007 AIP Conference Proceedings 938, pp. 136-141

Z. Djuric, Lj. M. Ignjatovic, A. A. Mihajlov and V. A. Sreckovic, “The influence of (n-n')-mixing processes in He*(n) + He(1s2) collisions on He* (n) atoms population of in weakly ionized non-equilibrium helium plasmas”, 28th ICPIG, July 15-20, 2007, Prague, Czech Republic

Cited by

V A. Sreckovic, Lj. M. Ignjatovic, and A. A. Mihajlov, “The Electrical Conductivity Of Partly Ionized Helium Plasma”, SIXTH INTERNATIONAL CONFERENCE OF THE BALKAN PHYSICAL UNION, AIP Conference Proceedings, April 23, 2007, Vol. 899, p. 704

DOI:10.1063/1.2733445

N. M. Sakan, A. A. Mihajlov, Lj. M. Ignjatović, V. A. Srećković, “THE MODELING OF THE CONTINUOUS EMISSION SPECTRUM OF A DENSE NON-IDEAL PLASMA IN OPTICAL REGION”, VI SERBIAN CONFERENCE ON SPECTRAL LINE SHAPES IN ASTROPHYSICS, 11-15 June 2007, Sremski Karlovci, Serbia

A. A. Mihajlov, D. Jevremovic, M. S. Dimitrijevic, Lj. M. Ignjatovic, “Influence of chemi-ionization and chemi-recombination processes on Hydrogen line shapes in M dwarfs”, 23rd Summer School and International Symposium on the Physics of Ionized Gases, Kopaonik, Serbia, August 28 – September 1, 2006

B. L. Sharp, P. S. Goodall, Lj.M. Ignjatović, H. Teng, "CLS-ICP-MS: Coincidence Laser Spectroscopy for Ion Detection in ICP-MS. Does it work?", WINTER 2005, European Winter Conference on Plasma Spectrochemistry, Budapest, Hungary

A. A. Mihajlov, Lj. M. Ignjatovic, M. S. Dimitrijevic ”Processes of Atom - Atom (n - n’)-mixing Influence on Hydrogen Atom Rydberg States Populations in Stellar Atmospheres”, 5th Serbian Conference on spectral lines shapes in Astrophysics, Vrsac, June 6-10, 2005, MEMORIE DELLA SOCIET` ASTRONOMICA ITALIANA Vol.7, p.151, 2005

Lj.M. Ignjatović, A.A. Mihajlov, A.M. Ermolaev and Sakan N.M., "Radiation charge exchange in ion-atom collisions at intermediate impact velocities: the importance and possibilities of experimental studies", 8th ECAMP, Contr. Papers, p. …, Rennes, France, (2004)

Lj.M Ignjatović, A. A. Mihajlov, "The contribution of strongly non-symmetric ion-atom collisions to the opacity of some star atmospheres in UV and VUV region", Moskva, (2004)

A.A. Mihajlov, Lj.M Ignjatović, "The influence of non-elastic processes in H*(n)+H collisions on the Rydberg states hydrogen atom populations in the photosphere of Sun", Moskva, (2004)

Mihajlov, A. A.; Ignjatovic, Lj. M.; Dimitrijevic, M. S.; Jevremovic, D.; Hauschildt, P. IAUS 210, B2 (2003)

Lj.M. Ignjatović and A. A. Mihajlov, "Modification of Abel inversion for discharges unstabilized by walls", 20th SPIG, Contrib. papers, Zlatibor, Yugoslavia, (2000).

Mihajlov, A. A., Dimitrijevic, M. S., Ignjatovic, Lj., Djuric, Z.: 2000, DIELECTRONIC CHEMI-IONIZATION AND CHEMI-RECOMBINATION ATOMIC PROCESSES IN STELLAR ATMOSPHERES, Joint European and National Astronomy Meeting JENAM-2000, 9th European and 5th Euro-Asian Astronomical Society Conference, ‘European Astronomy at the Turn of the Millennium', Moscow, Russia, May 29 - June 3, 2000, Abstracts, European Astronomical Society, Euro-Asian Astronomical Society, 207.

Lj.M. Ignjatović and A.A. Mihajlov, "Photoassociation during non-symmetrical ion-atom collisions as an absorbtion mechanism in low temperature plasmas", 31^st EGAS, Contrib. Papers, p. P2-80, Marseille, France, (1999).

Lj. M. Ignjatović and A. A. Mihajlov, "UV emission/absorption in H + A⁺ and H⁺ + A ion-atom collisions", 19th SPIG, Contrib. papers, Zlatibor, Yugoslavia, (1998).

Mihajlov, A. A., Ignjatovic, Lj. M., Dimitrijevic, M. S.: 1998, ROLE OF CHEMI-IONIZATION AND CHEMI-RECOMBINATION COLLISION PROCESSES IN PLASMA OF SOLAR PHOTOSPHERE, Novyj cikl aktivnosti Solnca: Nablyudatel'nyj i teoreticheskij aspekty, Pulkovo, 1998, Tezisi Konferencii, posvyashchennoj 50-letiyu Gornoj Astronomicheskoj Stancii GAO RAN, 52.

Mihajlov, A. A., Dimitrijevic, M. S., Ignjatovic, Lj. M., Djuric, Z.: 1997, THE INFLUENCE OF ION-ATOM COMPLEXES ON THE STELLAR PLASMA KINETIC AND OPTICAL CHARACTERISTICS OF STELLAR ATMOSPHERES, JENAM `97 (Joint European and National Astronomical Conference), New Trends in Astronomy and Astrophysics, Kalithea (Thessaloniki) 1997, Thessaloniki, European Space Agency, 147.

DOI: 1997jena.confE.147D

Mihajlov, A. A., Dimitrijevic, M. S., Ignjatovic, Lj. M., Vasiljevic, M.: 1997, CHEMI-IONIZATION AND CHEMIRECOMBINATION PROCESSES INFLUENCE ON EXCITED ATOM POPULATIONS IN SOLAR ATMOSPHERES, JENAM `97 (Joint European and National Astronomical Conference), New Trends in Astronomy and Astrophysics, Kalithea (Thessaloniki) 1997, Thessaloniki, European Space Agency, 48.

DOI: 1997jena.confE..48M

Mihajlov, A. A., Dimitrijevic, M. S., Ignjatovic, Lj. M., Vasiljevic, M. M.: 1997, CHEMI-IONIZATION AND CHEMI-RECOMBINATION RATE COEFFICIENTS FOR STELLAR ATMOSPHERES CONDITIONS, Abstracts of the 3rd General Conference of the Balkan Physical Union, eds. Emil Burzo and Viorel Pop, Cluj-Napoca 1997, 57.

A. A. Mihajlov, Lj.M. Ignjatović and M.S. Dimitrijević, "Emission/absorption bands in optical and VUV spectra of partialy ionized plasma generated by ion-atom collisions", Second Yugoslav Conference on Spectral Line Shapes, Proceedings, p. 9, Bela Crkva, Yugoslavia, (1997)

A. A. Mihajlov, E. M. Ermolaev, M. S. Dimitrijević and Lj. M. Ignjatović, "Radiative symmetrical ion-atom collisions as an additional source of continuous radiation from weakly-ionized plasma", 5th EPS Conference on Atomic and Molecular physics, Contrib. Papers, p. 793, (1995)

A. A. Mihajlov, Lj. M. Ignjatović, Z. Djurić and M. S. Dimitrijević, "Electron-ion-atom and electron-molecular ion recombination in hydrogen plasma", 19th ICPEAC, Contributed Papers, p. 587, (1995)

A. A. Mihajlov, M. S. Dimitrijević and Lj.M. Ignjatović, "Ion-atom collisions and electron recombination in astrophysical hydrogen plasma", 17th SPIG Contrib. papers, p. 346, Beograd (1994)

A. A. Mihajlov, M. S. Dimitrijević and Lj.M. Ignjatović, "The influence of ion-atom radiative collisions to the opacity in helium rich DB white dwarfs", Chemically Peculiar and Magnetic Stars, pp. 149-154, Tatranska Lomnica, Slovakia, (1994)

A. A. Mihajlov, M. S. Dimitrijević and Lj.M. Ignjatović, "Ion-atom radiative collisions in the solar atmosphere", 18th ICPEAC, Contr. Papers, p. 825, Aarhus, Denmark, (1993)

A.A. Mihajlov, Z. Djurić, Lj.M. Ignjatović and A. M. Ermolaev, "Structure of Coulomb logarithm and relation between efective and Debye's radius of electrostatic screening in highly ionized plasma", 20th ICPIG, Contr. Papers, p. 885, Pisa, Italia, (1991)

Z. Djurić, Lj.M. Ignjatović and A. A. Mihajlov, "Elastic scattering of free electron on in advance polarized atom", 20th ICPIG, Contr. Papers, p. 85, Pisa, Italia, (1991)

Lj.M.Ignjatović, A. A. Mihajlov and M.S. Dimitrijević, "Electron elastic scattering on the cut-off Coulomb and Debye potential", 15th SPIG, Contr. Papers, p. 37-38, Dubrovnik, (1990)