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The quasimolecular KX-ray spectrum obtained by bombarding Nb with 67 MeV Nb ions has been found to undergo a Doppler shift with an effective Doppler velocity equal to the mean center-of-mass velocity of the intermediate Nb + Nb molecule, corresponding to the projectile velocity. By applying Doppler shift corrections the intrinsic anisotropy of the quasimolecular KX-radiation is found.We have first shown in our previous experiments with Ge, Nb and ga ions [1][2][3] that the x-ray continuum lying above the intensive characteristic KX-lines of the ions and the target material consists of a lowenergy and high-energy component, denoted by us as (C1) and (C2), respectively. The high-energy part (C2) of the continuum has been interpreted as quasimolecular KX-radiation. Besides the properties of the (C2) component, the physical nature of the low energy component (

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