University of Latvia, Association FOTONIKA-LV, Institute of Atomic Physics and Spectroscopy
The Group of Atomic and Atmospheric Physics, and Photochemistry

Research Activities
Research and Teaching Projects
Cooperation and Research Contacts
Main Publications
Extended CVs of researchers: Dr. A. Ubelis, Dr. Hab. U. Berzinsh, Dr. U. Gross, Dr.J.Abolins, MSc E. Smalinsh, MSc. D. Berzina, MSc J. Blahins, MSc J. Pukite,Dr.Phys Janis Alnis, Dr.Phys Ojars Balcers
Research activities

experimental studies in atomic and ion physics, photochemistry, sources of UV - VUV atomic spectra, atmospheric pollution and photochemistry, technologies for sustainable development:


Previous but still on agenda:



Completed research and teaching projects



Active research and teaching projects

1.       FP7-REGPOT-2011-1 project FOTONIKA-LV, reg.  Nr. 285912.  Unlocking and Boosting Research Potential for Photonics  in Latvia  – Towards Effective Integration in the European Research Area (01.02.2012-31.07.2015). A. Ūbelis (Coordinator)

2.       NOCTURNAL ATMOSPHERE - FP7-PEOPLES-2011-IRSES project, contract Nr294949. “Secondary photochemical reactions and technologies for active remote sensing of nocturnal atmosphere” (01.02.2013-31.01.2017. A. Ūbelis (Coordinator), M.Abele (principal investigator)

3.       BIOSENSORS AGRICULT - FP7-PEOPLES-2012-IRSES project, contract Nr.316177 - “DEVELOPMENT OF NANOTECHNOLOGY BASED BIOSENSORS FORAGRICULTURE”, 01.09.2012-31.08.2016. A. Ūbelis (Coordinator), R.Viter (principal investigator)

4.      Taiwan-Latvia-Lithuania trilateral  Cooperation, Year 2011–2013. Nanoscaled functional materials for biotechnological and optical applications: RTU (Dr.K.Gross)  and LU ASI, Department of General and Inorganic Chemistry, Vilnius University,  Department of Chemical Engineering and Biotechnology, National Taipei University of Technology. A. Ūbelis (principal investigator).

5.       REFINED STEP,  FP7-PEOPLE-2013-IRSES,  Reg. 612691. An international network on new strategies for processing calcium phosphates. Coordinator K.Gross Riga Technical University. A.Ūbelis (principal Investigator)

6.       The project of  University of Latvia and Freiburg University : “Experimental research dedicated to interactions of negative ions with femtosecond laser light  beams”, Baltische-Deutsch HochSchule Kontor, 2013, U.Berziņš  (Coordinator), J.Alnis, J.Kļaviņš (principal investigators)

7.       International cooperation project at the University of Latvia Nr.1486 –“Atomic Physics and Spectroscopy” A. Ūbelis (Coordinator)


Cooperation and research contacts

·       Chalmer University of Technology University of Gothenburg, Sweden - Dr. D.Hastorp.

·       University of Bremen, Germany  (Prof.J.Burrows)

·       Laboratory for Atmospheric and Climate Science,   CSIC-JCCM,  Toledo,

·       University of East Anglia (Prof.P.Brimblecombe)

·       Stockholm University (Prof. H Cederquist)

·       Uppsala University, Baltic University Programme (Prof.L.Ryden)

·       Lund Institute of Technology, Sweden - Prof. S.Svanberg


Head: Dr.phys. Arnolds Ūbelis


Dr.Hab.phys. Uldis Bērziņš

Dr.Phys Janis Alnis

Dr.Phys Roman Viter

Dr.Āris Veispals

Dr.Phys Uldis Gross

Dr.phys. Janis Āboliņš

Dr.Phys Ojars Balcers

Dr.Jānis Kļaviņš

PhD candidate Janis Blahins

PhD candidate Edgars Šmaliņš

PhD candidate Sandra Šmaliņa

MSc. Dina Bērziņa

MSc Aigara Apsītis

MSc Viesturs Silamiķelis

MSc Aigars Rieba

MSc Regina Ūbele

Tech. Aleksandrs Kapralovs


Pavels Pavelko                     MSc  Student

Kristīne Ozola,                     MSc  Student

Levs Dolgovs,                       MSc  Student

Kristaps Kovaļevskis          MSc  Student

Armans Bžishjans               MSc  Student

Nauris Bruniņš                     MSs Student

Darta Ubele                          MSc student

Mārtiņš Sarma                     MSc  Student


Main publications


1.       Radiative and Collisional Characteristics of Atoms and Molecules. Tellurium. Ed. A.Ubelis. Riga. University of Latvia. 1989. 157 p.

  1. Integrative Approaches Towards Sustainability in the Baltic Sea Region, Ed.W.Leal, A.Ubelis, Peter Lang Europäischer Verlag  der Wissenschaften 2004. 556 p.

3.       Sustainable Development in the Baltic Sea Region and Beyond, Ed.:W.Leal, A.Ubelis, D.Berziņa, Peter Lang Europäischer Verlag der Wissenschaften 2006. 700 p.



1.       Viter, Roman; Starodub, Nikolay; Gevelyuk, Sergey; Ogorodniichuk, Yulia; Alute, Zanda; Smyntyna, Valentyn; Poletaev, Niklay; Ubelis, Arnolds. ZNO nanorods: application of room temperature photoluminescence for salmonella detection,.Submitted to IEEE Sensors Journal (Impact factor 1,52).

2.       Juan Carlos Gómez Martķn (1), Janis Blahins (2), Uldis Gross (2), Trevor Ingham (3,4), Andrew Goddard (3),  Anoop Sharad Mahajan (1), Arnolds Ubelis (2), and Alfonso Saiz-López. ROFLEX: Resonance and Off-Resonance Fluorescence by Lamp Excitation for in situ detection of atomic and molecular iodine.   Vol. 13, EGU2011-1239, 2011.

3.       In situ detection of atomic and molecular iodine using resonance and off-resonance fluorescence by lamp excitation: ROFLEX J. C. Gómez Martín, J. Blahins, U. Gross, T. Ingham, A. Goddard, A. S. Mahajan, A. Ubelis, and A. Saiz-Lopez. Atmospheric Measurement Techniques, 2010 AMTD - Atmos. Meas. Tech., 4, 29-45, 2011, (Impact factor 3,587).

4.       European Geosciences Union, General Assembly 2010, Vienna, Austria, 02 – 07 May 2010, EGU2010-15109, Eva Schuepbach, Peter Brimblecombe, Krisjanis Gross, Mark J. Jacobs, Annette Ladstätter-Weißenmayer, Nicolas Moussiopoulos, Theodora Slini, Arnolds Übelis, and Elmar Uherek We Care for Clean Air! The Contribution of ACCENT to Education and Communication.

5.       G.Bajars, A.Lusis, A.Ubelis. Integration of ecodesign course in design studies at the University of Latvia. Abstracts of Engineering Education in Sustainable Development 2008 Conference, Graz,

6.       J. Puķīte, S. Kühl, T. Deutschmann, U. Platt, and T. Wagner, Accounting for the effect of horizontal gradients in limb measurements of scattered sunlight, Atmos. Chem. Phys. Discuss., ACPD - Volume 7, Number 6, pp. 16155-16183, 2007

7.       J. Gravitis, J. Abolins, „Biomass Conversion to Chemicals and Nano-Materials by Steam Explosion”, in: 15-th European Biomass Conference & Exhibition, 7—11 May, 2007, Berlin, Germany, pp. 2076 – 2080

8.       E. Schuepbach, P. Brimblecombe, N. Moussiopoulos, M. Jacob, A. Ubelis, M. Kobernus and A. Arflot (2006) Learning about inter- and transdisciplinary: A training module for early career scientists. IGACtivities, 34. pp. 27-30.

9.       Kühl, S., Pukite, J., Deutschmann, T., Platt, U., and Wagner, T. 2006. SCIAMACHY Limb Measurements of NO2, BrO and OClO. Retrieval of vertical profiles: Algorithm, first results and validation. Adv. Space Res., in review.

10.    Ankie Piters, Ellen Brinksma, Miranda van den Broek, Bart Dils, Bo Galle, Louise, Kramer, Mark Kroon, Emmanuel Mahieu, Johan Meilqvist, Pauls S.Monk, Justusx Notholt, Yvan Orsolini, Andrea Petritoli, Daniel Schaub, Ralf Sussmann, Arnolds Ubelis.Validation Strategies for Tropospherc Satellite Data Products. In the book: The Changing Chemical Climate of the Atmosphe re. The first ACCENT Symposium, Sept. 2005. MMVI, ARACNE editrice, Roma, Nov.2006,  256.p.

11.    Pukite J., Ubelis A., Research and Monitoring of Air pollution from satellites. The aspects of Latvia. Sustainable Development in the Baltic Sea Region and Beyond, Ed.:W.Leal, A.Ubelis, D.Berzina, Peter Lang Europäischer Verlag  der Wissenschaften 2006. A.Ubelis.  Teaching for Sustainable Development and University-Municipality Partnership (project « Inversed BRAIN DRAIN). Sustainable Development in the Baltic Sea Region and Beyond, Ed.:W.Leal, A.Ubelis, D.Berzina, Peter Lang Europäischer Verlag  der Wissenschaften 2006. p193-203..

12.    A.Ubelis.  Teaching for Sustainable Development and University-Municipality Partnership (project « Inversed BRAIN DRAIN). Sustainable Development in the Baltic Sea Region and Beyond, Ed.:W.Leal, A.Ubelis, D.Berzina, Peter Lang Europäischer Verlag  der Wissenschaften 2006. p193-203..


14.    E. Smalins, U. Gross, J. Jansons, A. Ubelis, Atomic Spectra from RF Electrodeless Discharge Sources for UV and VUV Spectrometry and Analytical Measurements. MEASUREMENT SCIENCE REVIEW Volume 5, Section 3, 2005, pp. 94-97.  

15.    A Ground Validation Station for the Satellite-based Atmospheric Sensor Instruments GOME and SCIAMACHY, 187 Arnolds Ubelis, Edgars Smalins, Uldis Gross, Janis Pukite. In the book:  P Borrell, PM Borrell, JP Burrows, U Platt - 2004. Sounding the troposphere from space: a new era for atmospheric research. pp. 187-189.

16.    Edgars Smalins., Uldis Gross., Peter Spietz. Arnolds Ubelis. Iodine and bromine resonance lamps in atmospheric research,, Proc. SPIE vol. 5123, "Advanced optical devices", 2003, pages 63-68

17.    Air quality modelling as a part of complex air management system in Latvia. Kadikis N., Vasiljeva T., Jevtushenko L., Lyulko L, Smalins, E. Eighth International Conference on Harmonization within Atmospheric Dispersion Modelling for Regulatory Purposes. Sofia, Bulgaria,14-17 October 2002. Proceedings. Editors: Ekaterina Batchvarova and Dimiter,Syrakov. Sofia: Demetra Ltd. pp. 159 - 163.

18.    V.Gercans, A.Ubelis, Efforts to Create a Sustainable Economic Development in Livani. Co-ordinator of the model project (Livani-LU) within the INTERREG IIC project Sustainable Urban Patterns Around the Baltic Sea (SUPERBS). Case study III, INTERREG IIC report 21-32, 2002.

19.    P. Spietz, U. Gross, E. Smalins, J. Orphal and J.P.Burrows. Estimation of the emission temperature of an Electrode less Discharge lamp and Determination of the Oscillator Strength for the I(2P3/2) 183.038nm Resonance Transition, Spectrochimia Acta Part B (56) (2001), 2465-2478.

20.    Gunnar Haeffler, Igor Yu. Kiyan, Uldis Berzinsh, Dag Hanstorp, Nicklas Brandefelt, Eva Lindroth and David J. Pegg. Strongly correlated states in the Li- ion. Phys. Rev. A 6305 (2001) 3409

21.    Z S Li, H Lundberg, U. Berzinsh, S. Johansson and S. Svanberg: The FERRUM project: radiative lifetimes of the 3d5(6S)4s4p(3P)y6Po states of Fe II measured with time-resolved vacuum ultra-violet laser spectroscopy, will be published in J.Phys. B: At. Mol. Opt. Phys.34 (2001) 1-8.

22.    Gross, U. Ubelis A. Jansons J. 2001 Iodine and mercury resonance lamps and their spectrum in far UV, In Smart Optical Inorganic Structures and Devices Ašmontas S. A., Gradauskas J. Editors, Proc SPIE, Vol. 4318, p. 84-88

23.    Uldis Gross, Arnolds Ubelis, Peter Spietz, John Burrows. Iodine  and Mercury Resonance lamps for Kinetics Experiments and their Spectrum in the far Ultraviolet.. J. Phys.D.Appl.Phys.33(2000) 1588-1591

24.    .A.Ubelis, J.Abolins  Lessons of the past and challenges of the future Latvia, In: The knowledge-based economy. The Global Challenges of the 21st  Century. State Committee for Scientific Research. Republic of Poland. Science and Government Series. Vol. 5. Ed. Antoni Kuklinski, Witold M.Orlowski Warszawa 2000, p.130-140.

25.    Spietz P., Gross U., Smalins E., Orphal J., Burrows J. P. 2001 Estimation of the Emission Temperature of an Electrodeless Discharge Lamp and Determination of the Oscillator Strength for the I(2P3/2) 183.038 nm Resonance Transition Spectrochimica Acta   

26.    Spietz P., Gross U., Smalins E., Orphal J., Burrows J. P. 2001 Combined absorption and resonance absorption time resolved spectroscopy of iodine species for improved determination of IO and OIO absorption cross section Geophys. Res. Abstracts, Vol 3 GFA3, p.4879,

27.    I.Yu. Kiyan, U. Berzinsh, J. Sandstrom, D. Hanstorp and D. Pegg: Spectrum of Doubly Excited States in the K- ion, Phys. Rev. >Lett. 84 (2000) 5979-5982.

28.    D. H. Lee, M. B. Poston, D. J. Pegg, D. Hanstorp, U. Berzinsh, "Photodetachment of the Ca- ion at the 3P kp threshold", Phys. Rev. A 60, 715, (1999).

29.    Spietz P., Himmelmann S., Gross U., Orphal J., and Burrows J. P. 1998 Study of iodine oxides and iodine chemistry using flash photolysis and time resolved absorption spectroscopy (abstract) Ann. Geophys. Supp. II, 16, C p 722

30.    U. Berzinsh, S. Svanberg, "Atomic radiative lifetimes measured by pulsed laser spectroscopy in the UV/VUV spectral region", Adv. Quant. Chem. 30, 283 (1998).

31.    D. Hanstorp, G. Haeffler, A. E. Klinkmüller, U. Ljungblad, U. Berzinsh, I. Yu. Kiyan, and D. J. Pegg. "Two electron dynamics in photodetachment", Adv. Quant. Chem., 30 (1998).

32.    Andreas E. Klinkmüller, Gunnar Haeffler, Dag Hanstorp, Igor Yu. Kiyan, Uldis Berzinsh, and David J. Pegg, "Photodetachment study of the He- quartet resonances below the He(n=3) thresholds", J. Phys. B 31, 2549 (1998).

33.    Yu. Kiyan, U. Berzinsh, D. Hanstorp, and D. J. Pegg, "Series of doubly excited quartet states of He-", Phys. Rev. Lett. 81, 2874 (1998).

34.    Andreas E. Klinkmüller, Gunnar Haeffler, Dag Hanstorp, Igor Yu. Kiyan, Uldis Berzinsh, Christopher Ingram, David J. Pegg, and James R. Peterson, "Photodetachment study of the 1s3s4s 4S resonance in He-", Phys. Rev. A 56, 2788, (1997).

35.    Berzinsh U., Svanberg S.; Atomic Radiative Lifetimes Measured by Pulsed Laser  Spectroscopy in the UV/ VUV Spectral  Region, Accepted by Advances in Quantum Chemistry, 1997.

36.    Berzinsh TJ., Svanberg S. Biemont E.; Lifetimes for the 4p Excited States of Phosphorous and the Osciliator Strengths of Solar Lines,  Astron. & Astrphys 326, 1997, 412-416.

37.    Hanstorp ß.,.Ljungblad U., Berzinsh U., Pegg D.; Observation of Doubly Excited States in Negative Ions Using Resonance Ionization Spectroscopy; In the book ed. by Vinograd N., Parks J.E., Resonance Ionization Spectroscopy 1996, AIP Press; Woodbury, New York,1997, 97-102.

38.    Berzinsh U., Luo Cai an Zerne R Svanbe S.Biemont E.; Determination of Radiative Lifetimes in Neutral Sulphur Using Time-Resolved VUv Laser Spectroscopy, Phys. Rev. A 55, 1997, 936-942.

39.    R. Zerne, Luo Caiyan, U. Berzinsh and S. Svanberg, "Oscillator strengths of sulphur 3s23p34s 3So-3s23p34p 3P transitions measured by time resolved two-photon laser spectroscopy", Phys. Scripta 56, 459 (1997)..

40.    A.Ubelis, J.Silins I.Trabjerg. Specific UV and VUV Spectra Light Sources, in: Optical Inorganic Dielectric Materials and Devices. A.Krumins, D.Millers, A.Sternbergs, J.Spigulis(eds), Proc.SPIE 2967, (1997), pp. 266-269.

41.    U.Ljungblad, D.Hanstorp, U.Berzinsh, D.Pegg. Observation of Doubly Excited States in Li- Using Resonance Ionisation Spectroscopy. Phys. Rev. Lett. 77, 1996, 3751-3754.

42.    Gunnar Haeffler, Andreas E. Klinkmüller, Jonas Rangell, Uldis Berzinsh, and Dag Hanstorp, "The electron affinity of Tellurium", Z. Phys. D38 211-214, (1996).

43.    Luo Caiyan, Berzinsh U., Zerne R., Svanberg S.; Determination of Radiative Lifetimes in Neutral Bismuth by Time-Resolved Laser Spectroscopy, Phys. Rev. A. 52, 1995, 1936-1941.

44.    U.Berzinsh, G.Haeffler, D.Hanstorp, A.Klinkmuller, E.Lindroth, U.Ljungblad, D.J.Pegg. Resonance structure in the Li- Photo-detachment Crossection. Phys.Rev.Lett.1995, Vol.74, 4795-4798. e-print: physics/9703015.

45.    U.Berzinsh, D.Hanstorp, A.Klinkmuller, U.Ljungblad, A.M.Martenson-Pendrill. Isotope Shift in the Electrone Affinity of Clorine. Phys.Rev.A 1995 Vol. 51, 231-238. e-print: physics/9804028.

46.    R.Zerne, U.Berzinsh, S.Svanberg. Radiative Lifetimes of Neutral Tellurium Measured by Time Resolved Laser Spectroscopy. Z.Phys.D: Atoms, Molecules and Clusters 1994. Vol.32, 31-34.

47.    Hanstorp D., Gustaffson. IVT., Berzinsh U., Ljungblad U.; Collinear Photodetachment Spectroscopy, Nucl.Instr. & Meth.Phys.Res. B 79,1993 159-16I.

48.    Bengtsson G.J., Berzinsh U., Larsson J., Svanberg S.; Oscillator Strengths for Resonance Transitions in Neutral Selenium arid Tellurium Derived from Time-Resolved Laser Spectroscopy, Z.Phys. D: Atoms, Molecules and Clusters 23,1992, 29- 32.

49.    Bengtsson G.J., Berzinsh U., Larsson J., Svanberg S.; Determination of Radiative Lifetimes in Neutral Arsenic Using Time Resolved Laser Spectroscopy in the VUV Region, Astron. & Astrophýs. 263,1992, 440-442.

50.    Bengtsson G.J., Berzinsh U., Larsson J., Svanberg S., Zerne R.; Radiative Lifetime and Lande Factor measurements of the Se 4p3 5s 5S2 Level Using Pulsed-Laser Spectroscopy, J.Phys. II France 2, 1992, 773-779.

51.    Ubelis A., Berzinsh U.; 5s2 5p3 6s-5s2 5p4 Transition Probabilities of Te I. Phys. Scr. 43, 1991, 162-165.

52.    J.E.Rupkus, A.P.Ubelis, E.K.Kraulinya. Impact of Quartz Surfaces on the Volume Photochemical Processes in the Flash Photolysis of Tin Dibromide. Chim.Phys. 1989, V.8, No 3, p. 333-342. Russian.

53.    J.E.Rupkus, A.P.Ubelis. The Chemiluminescence in Flash Photolysis of Tin Dicloride Vapour. Chem. Phys. 1987, V. 6, No 7, p.1000- 1002. Russian.

54.    A.Ubelis, U.Berzinsh. Transition Probabilities Measurments of Se I Spectral Lines by Emission Method. Phys.Scr., 1986, V.34, No 6,  p.805-807.

55.    A.P.Ubelis, A.E.Lezdin. Spectral Distribution of Afterglow in the Flash Photolysis of Selenium and Sulphur Vapour. Chem.Phys. 1984, V.3, No 6, P.833-835, Russian.

56.    A.P.Ubelis, U.V.Berzinsh. Transition Probabilities Measurements of Te I Spectral Lines by Methods of Emission and Absorption of Radiation.- Phys.Scr. 1983. Vol.28. No 2. P.171-176.

57.    .A.P.Ubelis, A.E.Lezdin. Measurements of Absolute Values of Afterglows Intensity in Flash Photolysis of Tellurium Vapour. Kvant. Electr. 1982, V.9, No 10, p. 2097-2099.Russian.

58.    A.P.Ubelis. Temperature Curves of Saturated Tellurium Vapour. Inzh. Fiz. Zhrn. 1982. V. 42, No 3, p. 427-434, Russian.

59.    A.P.Ubelis,J.A.Silinsh, U.V.Berzinsh, Z.A.Rachko. The Spectra of High Frecquency Electrodeless Lamps in the Vacuum UV Region. Zhrn.Prikl.Spectr.1981, V. 35, No 2, p.216-219, Russian.

60.    A.P.Ubelis, J.A.Silinsh. Experimental Setup for high Temperature Flash Photolysis. Zhrnl. Prikl.Spekt.1979, V 31, No 4, p.755-757.

61.    A.P.Ubelis. Investigation of Selenium and Tellurium Atoms Using Method of Gaseous Flash Photolysis. Izv. AN Latv.SSR. 1978, No 2, p. 20-35, Russian.

62.    A.P.Ubelis, J.A.Silinsh The Population of Atomic States 1S0, 1D2, 3P0,1,2 in the Flash Photolysis of Selenium and Tellurium Molecules. Opt.Spectrosc. 1975, V33, No 3, p 479-485, Russian.


Last changes 2013.09.03.