Table 3: The fixed parameter values of the precomputed KOSMA- $\tau$ PDR-model clumps. Note that powers of ten are given in parentheses and the elemental abundances are given in units of the hydrogenabundance, i.e. X_i = n_i / n.
Quantity Value

He abundance $X_{\element{He}}$ 0.1

O abundance $X_{\element{O}}$ 3.0 (-4)

C abundance $X_{\element{C}}$ 1.4 (-4)

S abundance $X_{\element{S}}$ 2.8 (-5)

¹³C abundance $X_{\element[][13]{C}}$ 2.1 (-6)

Cosmic ray ionization rate $\chi_{\rm CR}\ [\ensuremath{{\rm s}^{-1}} ]$ 5 (-17)

Velocity width (FWHM) $\delta v\ [{\rm km}\ \ensuremath{{\rm s}^{-1}} ]$ 1.2

Dust UV cross section $\sigma\ensuremath{_{\rm dust}}\ [{\rm cm}^2]$ 1.9 (-21)

**Table 3:** The fixed parameter values of the precomputed KOSMA- $\tau$ PDR-model clumps. Note that powers of ten are given in parentheses and the elemental abundances are given in units of the hydrogenabundance, i.e. X_i = n_i / n.
Quantity	Value
He abundance $X_{\element{He}}$	0.1
O abundance $X_{\element{O}}$	3.0 (-4)
C abundance $X_{\element{C}}$	1.4 (-4)
S abundance $X_{\element{S}}$	2.8 (-5)
¹³C abundance $X_{\element[][13]{C}}$	2.1 (-6)
Cosmic ray ionization rate $\chi_{\rm CR}\ [\ensuremath{{\rm s}^{-1}} ]$	5 (-17)
Velocity width (FWHM) $\delta v\ [{\rm km}\ \ensuremath{{\rm s}^{-1}} ]$	1.2
Dust UV cross section $\sigma\ensuremath{_{\rm dust}}\ [{\rm cm}^2]$	1.9 (-21)

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