Table 4: Recombination time-scale for atomic states at $T_{\rm e}=10~000$ K for electron densities $n_{\rm e}$ of 100 and 200 e^- cm^-3. An increase of the electron density to $n_{\rm e}=300$ e^- cm^-3 only lowers the upper limits. The terms "r'' and "d'' refer to the radiative and dielectronic components in the total recombination coefficient "t''.
State $\tau_r(n_{\rm e}=100)~[{\rm yr}]$ $\tau_r(n_{\rm e}=200)~[{\rm yr}]$

H⁰ 760    380

He⁰ 1500    750

He⁺ 206    103

O²⁺(r) 31    16

O²⁺(d) 28    14

O²⁺(t) 19    9

O⁺(r) 155    78

O⁺(d) 190    95

O⁺(t) 85    43

N⁺(r) 139    70

N⁺(d) 155    78

N⁺(t) 73    37

**Table 4:** Recombination time-scale for atomic states at $T_{\rm e}=10~000$ K for electron densities $n_{\rm e}$ of 100 and 200 e^- cm^-3. An increase of the electron density to $n_{\rm e}=300$ e^- cm^-3 only lowers the upper limits. The terms "r'' and "d'' refer to the radiative and dielectronic components in the total recombination coefficient "t''.
State	$\tau_r(n_{\rm e}=100)~[{\rm yr}]$	$\tau_r(n_{\rm e}=200)~[{\rm yr}]$
H⁰	760	380
He⁰	1500	750
He⁺	206	103
O²⁺(r)	31	16
O²⁺(d)	28	14
O²⁺(t)	19	9
O⁺(r)	155	78
O⁺(d)	190	95
O⁺(t)	85	43
N⁺(r)	139	70
N⁺(d)	155	78
N⁺(t)	73	37

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