Figure 2. Gaseous products found in the photolysis of ClONO2 adsorbed on ice.

T = 200 K Excitation source: High pressure Hg lamp.

Figure 3. Gaseous products found in the photolysis of ClONO2 adsorbed on ice as a function of the photolysis time.

T = 200 K Excitation source: Halogen lamp.

Figure 4. Comparison between UV spectra of photochemical gaseous products and bibliography³.

Figure 5. Photochemical gaseous products obtained at different thickness of ClONO2 adsorbed on ice.

T = 200 K. Photolysis time: 10 min. (Hg lamp). The thickness was estimated assuming a ClONO2 molecular radio of 3.59 Å calculated using the program Gaussian94 (Base 6-31g*).

Figure 6. Photochemical gaseous products obtained at various temperatures.

Excitation source: Halogen lamp.

Table 1. Percentage of ClONO₂ decomposed under illumination calculated as:

2 x (mole of Cl₂ + mole of Cl₂O). Excitation source: Hg lamp

* Excitation source: Halogen lamp

INTRODUCTION EXPERIMENTAL RESULTS DISCUSSION ATMOSPHERIC IMPLICATIONS REFERENCES