Chiral molecule formation in interstellar ice analogs: alpha-aminoethanol NH2CH(CH3)OH

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Table 4

Parameters for thermal formation, photo-destruction, and desorption rates.

	Species		A (s^-1)	E(kJ mol^-1)	Ref.

Thermal formation rate^a	NH₂CH(CH₃)OH	k₁	6.7 × 10¹⁰	33	this work

	NH₃	k₅	3 × 10¹²	25.5	Sandford & Allamandola (1993)
Desorption rate^a	CH₃CHO	k₆	3 × 10¹²	25.5	Sandford & Allamandola (1993)
	NH₂CH(CH₃)OH	k₇	3 × 10¹²	58	Bossa et al. (2009a)

			σ (photon^-1 cm²)
	NH₂CH(CH₃)OH	k₂	4.5 × 10^-19		this work
Photo-destruction rate^b	NH₃	k₃	5 × 10^-18		Woodall et al. (2007)
	CH₃CHO	k₄	1.1 × 10^-17		Woodall et al. (2007)

Notes.

^(a)

The rate coefficients are given in the form k = A.exp(−E / RT), where T is the ice temperature, A the pre-exponential factor, and E the energy (activation or desorption).

^(b)

Photodissociation rates are written as k = σ.f, where σ represents the photodissociation cross-section and f the interstellar ultraviolet radiation field.

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