Swift heavy ion irradiation of water ice from MeV to GeV energies - Approaching true cosmic ray compaction

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Table 3

OH-db destruction rates.

	GCR			⊙

	E₀ = 200	E₀ = 400	E₀ = 600	E₀ = 200	E₀ = 400	E₀ = 600

ζ(s^-1)^a	3.34(–16)	5.89(–17)	2.12(–17)	1.70(–16)	3.00(–17)	1.08(–17)
E_th = 0eV /Å^b
Light^c	0.589	0.580	0.576	0.935	0.933	0.932
Z ≥ 3^d	0.411	0.420	0.424	0.065	0.067	0.068
Fe	0.073	0.078	0.080	0.012	0.013	0.014
τ(My)^e	0.14	0.71	1.82	0.25	1.34	3.48
E_th = 4eV /Å^b
Light^c	0.122	0.090	0.075	0.534	0.455	0.410
Z ≥ 3^d	0.878	0.910	0.925	0.466	0.545	0.590
Fe	0.179	0.213	0.238	0.101	0.139	0.168
τ(My)^e	0.33	1.94	5.43	2.09	14.11	42.79

Notes.Calculated with the best fit cross section σ^OH d.b.(Se) = 131 × Se(eV/Å)^1.0. 4.05(−16) means 4.05 × 10^-16;

^(a)

calculated ionisation rate;

^(b)

adopted cross section stopping power threshold;

^(c)

fraction of the OH-db destruction rate induced by H and He ions;

^(d)

fraction of the OH-db destruction rate induced by Li to Ni ions;

^(e)

OH-db calculated destruction time scale. A destruction time scale of one million years corresponds to a rate of about 3.17 × 10^-14 s^-1.

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