Table 1: "Standard'' clouds.
Type r(pc) $n({\rm cm}^{-3})$ $N({\rm cm}^{-2})$ G₀ $F_{\rm X}$ [erg s^-1 cm^-2]

A 1 10⁴ - 10^6.5 $3 \times 10^{22}{-}1 \times 10^{25}$ 10²-10⁵ 1.6-160

B 10 10³ - 10⁴ $3 \times 10^{22}{-}3 \times 10^{23}$ 10¹-10⁴ $1.6\times10^{-1}{-}16$

C 10 10² - 10³ $3 \times 10^{21}{-}3 \times 10^{22}$ 10^0.5-10³ $1.6\times10^{-2}{-}1.6$

**Table 1:** "Standard'' clouds.
Type	r(pc)	$n({\rm cm}^{-3})$	$N({\rm cm}^{-2})$	G₀	$F_{\rm X}$ [erg s^-1 cm^-2]
A	1	10⁴ - 10^6.5	$3 \times 10^{22}{-}1 \times 10^{25}$	10²-10⁵	1.6-160
B	10	10³ - 10⁴	$3 \times 10^{22}{-}3 \times 10^{23}$	10¹-10⁴	$1.6\times10^{-1}{-}16$
C	10	10² - 10³	$3 \times 10^{21}{-}3 \times 10^{22}$	10^0.5-10³	$1.6\times10^{-2}{-}1.6$

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