From 1923 to 1935 she took part in the researches at the Radium Institute as a member of the Austro-German research group (K. Przibram, H. Pettersson, B. Karlik, M. Blau, E. Föyn, E. Rona, L. Meitner, S. Horovitz, etc.). The results of these researches are broadly cited.

       Przibram and Karamichailova carried out research in radioluminescence. Pettersson, Karlik and Karamichailova investigated the scintillation method for registration of alpha-particles and protons. During the 1931 Blau and Karamichailova measured the absorption coefficient of the high penetrated radiation, discovered one year ago from Bote and Becker at alpha-ray treatment of beryllium. At that time, this radiation was accepted as high energetic gamma quanta. One year later Chaduik in England ascertained that it consist of neutral material particles with a mass close to that of the proton and therefore he is known as discoverer of the neutron. Föyn, Rona and Karamichailova carried out research over transmutation of thorium under the neutrons.

       In 1935 E. Karamichailova was granted a 3-year Alfred Yarrow Research Fellowship from Girton College in Cambridge. She was employed by Cavendish Laboratory, whose director was Lord Rutherford. There she applied the scintillation method for gamma-spectroscopy of actinium radiation. E. Karamihailova and D. Lea investigated the secondary and tertiary ionization in gases under the high pressure. Later Lea continued these investigations in the biological objects which lay the foundation of the Radiobiology.

       In 1939 Karamihailova returned in Bulgaria and she was appointed to be associate professor in physics by Sofia University. From 1946 she was a head of the new chair of Atomic physics. From 1955 to 1968 she was employed by Institute of Physics of the Bulgarian Academy of Sciences as a head of the Department of Radioactivity.

       In Bulgaria she carried out investigations over the natural radioactivity of different objects (natural and mineral water sources, air, soil, curative mud, rocks and minerals, etc.) and over the radioactive contamination of the environment in results of the nuclear explosions in the atmosphere at that time.

Elizabet Karamichailova 2006, 1:15 B. Amov

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