Astronomy & Astrophysics

Table 1: Hydrogen peroxide destruction and formation cross-sections calculated by using Eqs. (3) and (4) and maximum H₂O₂/H₂O(%) ratio obtained from Figs. 4 and 5.

Ion Temp. Cross-sections Maximum

(K) destruction ( $\sigma_{\rm d})$ formation ( $\sigma_{\rm f}$ ) H₂O₂/H₂O(%)

$\times 10^{-15}$ cm² $\times$ 10^-15 cm²

H⁺ 16 $9.0 \pm 1.2$ $0.099 \pm 0.017$ 1.2

H⁺ 77 $16 \pm 5$ $0.056 \pm 0.021$ 0.4

He⁺ 16 $13.0 \pm 1.0$ $0.29 \pm 0.02$ 2.4

He⁺ 77 $30 \pm 5$ $0.38 \pm 0.05$ 1.3

Ar⁺⁺ 16 $3.8 \pm 0.4$ $0.115 \pm 0.008$ 6

Ar⁺⁺ 77 $9.5 \pm 2.0$ $0.26 \pm 0.05$ 3.0

**Table 1:** Hydrogen peroxide destruction and formation cross-sections calculated by using Eqs. (3) and (4) and maximum H₂O₂/H₂O(%) ratio obtained from Figs. 4 and 5.
Ion	Temp.	Cross-sections	Maximum
	(K)	destruction ( $\sigma_{\rm d})$	formation ( $\sigma_{\rm f}$ )	H₂O₂/H₂O(%)
		$\times 10^{-15}$ cm²	$\times$ 10^-15 cm²
H⁺	16	$9.0 \pm 1.2$	$0.099 \pm 0.017$	1.2
H⁺	77	$16 \pm 5$	$0.056 \pm 0.021$	0.4
He⁺	16	$13.0 \pm 1.0$	$0.29 \pm 0.02$	2.4
He⁺	77	$30 \pm 5$	$0.38 \pm 0.05$	1.3
Ar⁺⁺	16	$3.8 \pm 0.4$	$0.115 \pm 0.008$	6
Ar⁺⁺	77	$9.5 \pm 2.0$	$0.26 \pm 0.05$	3.0

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