Table 2: Values of non-dissociative single ionization (photoionization) cross section ( $\sigma _{\rm ph-i}$ ) and dissociative ionization (photodissociation) cross section ( $\sigma _{\rm ph-d}$ ) of formic acid as a function of photon energy. The estimated experimental error was 30%. The photoabsorption cross section $\sigma _{\rm ph-abs}$ from Ishii & Hitchcock (1987).
Photon Cross sections (cm²)

energy (eV) $\sigma _{\rm ph-d}$ $\sigma _{\rm ph-i}$ $\sigma _{\rm ph-abs}$

275 $6.61\times 10^{-20}$ $7.21 \times 10^{-23}$ $7.00^a \times 10^{-20}$

280 $6.64\times 10^{-20}$ $6.12 \times 10^{-22}$ $7.00^a \times 10^{-20}$

290 $6.20\times 10^{-19}$ $6.06 \times 10^{-21}$ $6.42\times 10^{-19}$

300 $1.78\times 10^{-18}$ $1.83 \times 10^{-20}$ $1.88\times 10^{-18}$

310 $1.03\times 10^{-18}$ $9.83 \times 10^{-21}$ $1.10\times 10^{-18}$

^a Extrapolated data (see Fig. 7).

**Table 2:** Values of non-dissociative single ionization (photoionization) cross section ( $\sigma _{\rm ph-i}$ ) and dissociative ionization (photodissociation) cross section ( $\sigma _{\rm ph-d}$ ) of formic acid as a function of photon energy. The estimated experimental error was 30%. The photoabsorption cross section $\sigma _{\rm ph-abs}$ from Ishii & Hitchcock (1987).
Photon	Cross sections (cm²)
energy (eV)	$\sigma _{\rm ph-d}$	$\sigma _{\rm ph-i}$	$\sigma _{\rm ph-abs}$
275	$6.61\times 10^{-20}$	$7.21 \times 10^{-23}$	$7.00^a \times 10^{-20}$
280	$6.64\times 10^{-20}$	$6.12 \times 10^{-22}$	$7.00^a \times 10^{-20}$
290	$6.20\times 10^{-19}$	$6.06 \times 10^{-21}$	$6.42\times 10^{-19}$
300	$1.78\times 10^{-18}$	$1.83 \times 10^{-20}$	$1.88\times 10^{-18}$
310	$1.03\times 10^{-18}$	$9.83 \times 10^{-21}$	$1.10\times 10^{-18}$

Source LaTeX | All tables | In the text

	1 Introduction
	2 Experimental
	3 Results and discussion
	4 Summary and conclusions
	References