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We present an experimentally study of the dissociative excitation incollision of helium ions with nitrogen and oxygen molecules for collisionenergy of $0.7-10$ keV. Absolute emission cross sections is measured andreported for the most nitrogen and oxygen atomic and ionic lines in wide,vacuum ultraviolet ($80-130$ nm) and visible ($380-800$ nm), spectral region.The striking similarities of processes realized in He$^{+}+$N$_{2}$ andHe$^{+}+$O$_{2}$ collision system are observed. We present polarizationmeasurements for He$^{+}+$N$_{2}$ collision system. Emission of exciteddissociative products was detected with the improved method of high-resolutionoptical spectroscopy. This device is incorporated with the retarding potentialmethod and a high resolution electrostatic energy analyzer to measure preciselythe energy of incident particles and the energy of dispersion. The improvementof an optics resolution allows us to measure the cross section on the order of10$^{-19}$ cm$^{2}$ or lower.

Excitations of N$_{2 }$ and O$_{2}$ molecules due to helium ion impact and a polarization effect