Laboratory of Molecular Beams

of the division of PHYSICAL CHEMISTRY

Professor Dmitrii N. Trubnikov - head of the laboratory since 1979.


The Laboratory of Molecular Beams has been created by Prof. D. Trubnikov in 1979. The main contributions to the development of the Laboratory were made by Dr. A. Lazarev, Dr. V. Baranov, Dr. N. Zastenker, Dr. A. Larin, Dr. E. Belega.

The main field of the investigations carried out in the laboratory is the chemistry in supersonic beams. The investigations include:

Essential contribution was made to the field of investigation of the physical-chemical processes in the non-equilibrium gas matter. Some laws of relaxation processes in continuous and pulse supersonic jets expanding into a vacuum have been estimated; mathematical models were developed to describe the macroparameters of the jets in the different regions of expanding.

New method to obtain the interaction potential parameters was proposed for atoms at low energy. A modified quasi-classical method was developed and used to calculate the partition functions of van der Waals clusters.

Molecular Dynamic Method is widely used in the Laboratory to study conformational transitions in clusters. Studies of van der Waals complexes like benzene-Arn is of special significance by time-of-flight mass spectrometry with resonance enhanced two-photon ionization (REMPI) and zero-energy spectroscopy (ZEKE).

New effects of atom, molecule, and ion velocity distributions have been experimentally obtained from pulse laser deposition of the different complex thin films.

Some research of the last years deals with the relationship between interaction energy and intermolecular vibration frequency shift in diatomic molecule adsorbed or included in benzene complex.

van der Waals molecules are investigated experimentally by RETOF method. Complex for these studies includes: reflection time of flight mass spectrometer, the source of supersonic jet and molecular beam, CO2 laser, eximer laser, two tunable dye lasers with doubling frequency, YAG:Nd laser with five harmonics, and multichannel optical analyzer. For theoretical investigations of van der Waals molecules Molecular Dynamics method is widely used.

The laboratory is a member of the inter-university project "Chemistry in supersonic jets", and is a member of the joint project with Sussex University (Great Britain) "Investigation of small van der Waals and metal clusters and ions (theory and experiment)" supported by the Royal Society.


Two courses for students and graduate students are given:

Selected publications

A.V. Larin, S.V. Poljanski, D.N. Trubnikov.
Assignment of rotational structure of band Ooo of electronic transition A1g-B2u in van-der-Waals clusters of the C6H6-X (X=N2, CO2, CO) type. Chem.Phys.Lett. 216, 619-626 (1993).
P.V. Elyutin, V.I. Baranov, E.D. Belega, D.N. Trubnikov.
The partition functions and thermodynamic properties of small clusters of rare gas atoms. J.Chem.Phys. 100, 3843-3854 (1994).
V.I. Baranov, A.V. Pribytkov, D.N. Trubnikov.
Metastable decay of benzene-Arn toluene-Arn clusters their registration by time of flight mass-spectrometer. Khimicheskaya Fizika 13, N 6, 32-41 (1994).
V.A. Mikhailov, F.N. Putilin, D.N. Trubnikov.
Study of PbTe(Ga) evaporation using a nanosecond laser. Appl.Surf.Sci. 86, 64-67 (1995).

Phone: (095) 939-4560
FAX: (095) 939-3952

List of other divisions and laboratories of the Chemistry Department
Home Page of the Chemistry Department