INTERNATIONAL JOURNAL OF MODERN PHYSICS D, cilt.13, sa.2, ss.197-213, 2004 (SCI-Expanded)
Dependences of the X-ray luminosity (L-x) of young single pulsars, due to ejection of relativistic particles, on electric field intensity, rate of rotational energy loss ((E)over dot), magnetic field, period, and some other parameters of neutron stars are discussed. Influence of the magnetic field and effects of some other parameters of neutron stars on the L-x and the L-x-tau (characteristic time) dependences are considered. Evolutionary factors also play an important role in our considerations. Only the pulsars with L2-10 keV > 10(33)erg/s have pulsar wind nebula around them. The pulsars from which gamma-ray radiation has been observed have low X-ray luminosity in general.