Table 1 Ratio of the relative intensities of the light emission of the molecular bands of OH, N2(C) and N2+ and of the atomic lines of He and O from the plasma jet in the absence or presence of a shielding gas of pure O2.

From: Synergistic Effect of H2O2 and NO2 in Cell Death Induced by Cold Atmospheric He Plasma

Gas species

Ratio (no shielding/O2 shielding)

OH (309 nm)

33

N2(C) (337 nm)

2155

N2+ (391 nm)

1475

He (706 nm)

0.72

O (777 nm)

0.22

  1. The data are derived from the experimental values measured from the emission spectra of each species shown in Fig. 10. Note that the emission intensity of the molecular bands of OH, N2(C) and N2+ drop drastically in the presence of the shielding gas of pure O2.
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