91 research outputs found
On nature of the scalar-isoscalar mesons in the uniformizing-variable method based on analyticity and unitarity
The experimental data on the processes
in the
channel have been jointly analyzed to study the status
and nature of the . The method of analysis is based on analyticity and
unitarity and uses an uniformization procedure. Some spectroscopic implications
from results of the analysis are discussed.Comment: 18 pages, 5 figures, 9 table
Synthesis of technetium hydride TcH at 27 GPa
In this work, we synthesize and investigate lower technetium hydrides at
pressures up to 45 GPa using the synchrotron X-ray diffraction, reflectance
spectroscopy, and ab initio calculations. In the Tc-H system, the hydrogen
content in TcH phases increases when the pressure rises, and at 27 GPa we
found a new hexagonal (hcp) nonstoichiometric hydride TcH. The
formation of technetium hydrides is also confirmed by the emergence of a new
reflective band at 450-600 nm in the reflectance spectra of TcH samples
synthesized at 45 GPa. On the basis of the theoretical analysis, we proposed
crystal structures for the TcH (TcH) and
TcH (TcH) phases previously obtained at 1-2 GPa. The
calculations of the electron-phonon interaction show that technetium hydrides
TcH do not possess superconducting properties due to the low
electron-phonon interaction parameter ()
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