Yu. M. Tsipenyuk

Search for anomalous carbon atoms — evidence of violation of the Pauli principle during the period of nucleosynthesis

AbstractA search for anomalous carbon atoms

Application of the 30 MeV microtron for gamma and neutron activation analysis

{}^{12}\tilde C

Gamma-activation analysis of nitrogen solubility in alumosilicates at high pressure and temperature

— atoms with three K-shell electrons — is made by γ-activation analysis of boron with the impurity carbon removed radiochemically. A limit on the existence of such atoms was determined:

Influence of a nonmagnetic impurity on the properties of the quasi-one-dimensional antiferromagnet CsNiCl3

{}^{12}\tilde C/{}^{12}C < 2.5 \times 10^{ - 12}

Observation of anomalous dissipation in dynamics of vortices in Bi2212 in the region of 3D-2D crossover

. This corresponds to a limit on the lifetime with respect to violation of the Pauli principle by electrons in a carbon atom of τ⩾2×1021 yr.

Dynamic and stimulated rf echo in high-Tc superconducting powders

The potential of the gamma activation determination of platinum-group elements and gold both by instrumental gamma activation analysis (bulk analysis) and by monitoring their distribution using autoradiography (local analysis) is studied. It is shown that platinum-group elements and gold can be determined by direct gamma-ray spectrometry in silicate samples with a detection limit of 10–3–10–5%. In contact gamma activation autoradiography, the detection limit for these elements is about 10 ng with a spatial resolution of 10–20 μm.