We develop a method for a Mossbauer study at high pressures using radioactive samples, with extraction of radiation via a Bridgman anbil, made from boron nitride. The pressure calibration is carried out by measuring the lattice parameter of NaCl. We obtain Mossbauer spectra of tellurium and tellurium clioxide at pressures up to 110 kbar. In tellurium, we observe a decrease of the quadrupole splitting of the spectrum at pressures above 40 kbar, which corresponds to the points of first-order phase transition.
Department of Solid-State Physics, Faculty of Physics, Moscow State University, Leninskie Gory, Moscow, 119991, Russia
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