Lyα irradiation of solid-state formamide | Astronomy & Astrophysics (A&A)

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Table 2.

Destruction cross-sections of NH₂CHO under different energetic processing and the corresponding rates in the dense interstellar clouds.

Processing	Destruction cross-section	Flux	Destruction rate
	σ_d, (cm²)	Φ, (cm⁻² s⁻¹)	R_d, (s⁻¹)
UV photons	1.9 ± 0.2 × 10⁻¹⁸	4.8 × 10³ ^(c)	9.1 × 10⁻¹⁵
H atoms	3.0 ± 0.6 × 10⁻¹⁷ ^(a)	9.1 × 10⁴ ^(b)	2.7 × 10⁻¹²
Cosmic rays	3.7 ± 0.4 × 10⁻¹⁶ ^(d)	1 ^(e)	3.7 × 10⁻¹⁶

Notes.

^(a)

Suhasaria & Mennella (2020).

^(b)

Mennella (2006).

^(c)

Corresponds to 10 eV photons (Mennella et al. 2003).

^(d)

Corresponds to 1 MeV protons under monoenergetic approximation (Baratta & Palumbo, priv. comm.)

^(e)

Mennella et al. (2003).

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