Dr. Irisali Khidirov is the head of the Composition Materials Laboratory of the Institute of Nuclear Physics of the Uzbekistan Academy of Sciences (Tashkent), doctor of sciences in physics and mathematics, full professor of Solid State Physics, Honorary Doctor of Sciences in Physics of the Yorker International University in Italy. His research is concerned with the study of phase transformations and crystal structures of interstitial alloys, intermetallic compounds and their hydrides, superconducting ceramics and other ceramics by method of neutron diffraction. He has found various types of long-range orders, ordered antiphase domains, stable and metastable phases in interstitial alloys formed under the influence of temperature and - irradiation; the hydrogen thermoemission phenomenon from hydrogen containing powder crystals - full removal of hydrogen from a crystal lattice without change of elements symmetry. He showed that in the ordered layered hexagonal close-packed structure of interstitial solid solutions hydrogen isotopes H and D cannot be on the same plane. He has more than 150 scientific publications.