Mikhail Ivanovich Bagatskii
 


 

 Head of Group for investigation of heat capacity of molecular crystals.
Doctor of Physics and Mathematics Leading reasercher in Department of Thermal Properties of Molecular Crystals
ILTPE NAS of Ukraine
47, Prospekt Lenina, Kharkov-103
E-mail: bagatskii@ilt.kharkov.ua
Tel.: +38-(057)-330-85-79
Fax: +(38)-057-340-33-70


M.I. Bagatskii, born 16th September, 1939, in Kharkov, graduated from Kharkov State University in 1962. Since 1962 he has working at the Institute for Low Temperature Physics and Engineering of NAS of Ukraine in the Department of Thermal Properties of Molecular Crystals.

Since 1962 M.I. Bagatskii has been engaged in calorimetric investigations at low temperatures. He is an author and co-author of over 70 scientific publication and investigations.

M.I. Bagatskii and his collaborators have developed and constructed a unique adiabatic colorimeter permitting investigations of thermal effect in crystals and the heat capacity of quantum and classical molecular crystals (cryocrystals) in temperature interval of 0.4 300 Ê.

Basic trends of scientific activity: phase transitions, lattice dynamics of quantum molecular crystals (H2, HD, D2, CH4) and their solution, classical cryocrystals (Ne, Ar, Kr, Xe, N2, CO2, CO, ND3, NH3, CH4, CD4, CCl4, SF4, and so on) and their solytions, dynamic of disordered systems, impacts of various factor on heat transfer in a system with superfluid helium.
Properties under investigation: heat capacity, heats of phase transition, conversion, quantum diffusion (configuration relaxation).

Principal results obtained by the researchers of the group:
- detection of a great decrease in helium transfer by the film on the solid para-hydrogen surface
- detection of quantum diffusion in solid deuterium with a record-narrow tunelling band ≈ 10-9 Ê,
- detection of a glass-like behavior of weak solution of cryocrystals - detection of nuclear
- spin conversion of deuteromethane in solid CD4–Kr solution at helium temperatures

It has been shown experimentally that quantum diffusion in solid hydrogen and deuterium is determined by the tunnel transfer of the angular momentum of the molecule rather than by the mass transfer. The isotopic effect in the heat capacity of solid concentrated orientationally disordered solutions of ÑD4 and ÑÍ4 in Kr has been revealed and interpreted. It is shown experimentally that the hybryd machanism of ÑD4 and ÑÍ4 conversion is dominant below 2 K.

Publication after 2000:

  1. I.Ya. Minchina, V. G. Manzhelii, M. I. Bagatskii, O. V. Sklyar, D. A. Mashchenko, and M. A. Pokhodenko, Heat capacity of methane-krypton solid solutions. Conversion effect, Fiz. Nizk. Temp. 27, 773, (2001) [Low Temp. Phys. 27, 568 (2001)].
  2. M.I. Bagatskii, V.G. Manzhelii, I.Ya. Minchina, D.A. Mashchenko, I.A. Gospodarev, Rotational excitations in concentrated solid Kr–CH4 solutions. Calorimetric studies, J. Low Temp. Phys. 130, 459 (2003).
  3. 3. M.I. Bagatskii, V.G. Manzhelii, D.A. Mashchenko, V.V. Dudkin, Detection of nuclear-spin conversion of CD4 molecules in solid deuteromethane-krypton solution, Fiz. Nizk. Temp 29, 216 (2003) [Low Temp. Phys. 29, 159 (2003)].
  4. M.I. Bagatskii, V.G. Manzhelii, D.A. Mashchenko, V.V. Dudkin, Heat capacity of solid deuteromethane-krypton solutions, Nuclear spin conversion in CD4 molecules. Fiz. Nizk. Temp 29, 1362 (2003) [Low Temp. Phys. 29, 1028 (2003)].
  5. M.I. Bagatskii, V.V. Dudkin., D.A. Mashchenko, V.G. Manzhelii, E.V. Manzhelii, Isotopic effect in heat capacity of solid concentrated orientationally-disordered solutions of methane and deuteromethane in krypton, Fiz. Nizk. Temp 31, (2005) [Low Temp. Phys. 31, (2005) (in press)].
  6. M.I. Bagatskii, I.Ya. Minchina, V.M. Bagatskii, Heat capacity of p-H2 p-D2 Ne solid solution: Effect of (p-D2)Ne clusters, Fiz. Nizk. Temp 31, 620 (2005) [Low Temp. Phys. 31, 470 (2005)].
  7. M.I. Bagatskii, V.V. Dudkin, V.G. Manzhelii, D.A. Mashchenko, S.B. Feodosiev, Low temperature anomaly of heat capacity of CD4 rotors in solid CD4 Kr solution, J. Low Temp. Phys. 139, 551 (2005).

June, 2005.