26.08.2015   Pumping

Mixtures of Rare Gases with Molecular Gases

Interest in the study of luminescence characteristics of mixtures of rare gases with molecular gases is related primarily to the search for new lasing transmissions for NPLs and to the study of the influence of molecular impurities on the parameters of known NPLs. The most significant studies in this area are shown in Table 4.13.

Table 4.13 Experimental research on radioluminescent characteristics of mixtures of rare gases with molecular gases

Spectral

Pressure,

Works

Gas media (excitation method)

range, nm

atm

Luminescent spectrum

cited

Mixtures of rare gases with N2, CO2

He(Ne, Ar)-N2 (210Po a particles)

240-550

<1.3

Bands 2+N2 and 1 Nj

[36]

Ne-N2(CO2) (239Pu a particles)

300-820

0.1-6

Ne-N2: bands 2+N2 and 1~N+, Ne-CO2: UV transitions of COj

[77]

He(Ne, Ar)-N2 (210Po a particles)

240-1,200

1

Bands 2+N2 and 1~Nj; bands of radicals CN, NO, OH, NH

[81]

He(Ar)-N2 (252Cf fission fragments)

200-500

0.2-6

Bands 2+ N2 and 1~Nj

[92, 93]

Mixtures of rare gases with halogen-containing substances

3He-Cl2(F2) (products of the reaction 3He(n, p)3H)

300-900

<2

3He-Cl2: atomic lines ClI, 3He-F2: atomic lines of FI

[86]

He(Ne, Ar)-NF3; He-SF6(CCl4,

350-875

0.45-1.8

Relative intensities of

[94, 95]

CCl2F2, C2F3Cl3) (235U fission

13 lines of FI and

fragments)

10 lines of ClI

In studies [92, 93], apart from the luminescence spectra of mixtures (Ar)-N2, the time dependencies of luminescence and populating efficiencies of the states N2(C3nu), N2+(B2Xm+) were also determined.