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Table B.1

continued.

Reaction Rate coefficient (cm3 s-1) T range Ref.

6...... He++ + e He+ + γ k6 = 1.891 × 10-10(1.0+ 5
× (1.0+ /(
7...... H + e H + γ k7 = 1.4 × 10-18T0.928exp( − T/ 16 200) 6
8...... H + H H2 + e k8 = a1(Ta2 + a3Ta4 + a5Ta6) / (1.0 + a7Ta8 + a9Ta10 + a11Ta12) 7
a1 = 10-10
a2 = 9.8493 × 10-2
a3 = 3.2852 × 10-1
a4 = 5.5610 × 10-1
a5 = 2.7710 × 10-7
a6 = 2.1826
a7 = 6.1910 × 10-3
a8 = 1.0461
a9 = 8.9712 × 10-11
a10 = 3.0424
a11 = 3.2576 × 10-14
a12 = 3.7741
9...... H + H+ H + γ k9 = 2.10 × 10-20(T/ 30.)-0.15 T< 30 K 8
dex[−18.20 − 3.194log 10T + 1.786(log 10T)2 − 0.2072(log 10T)3 ] T ≥ 30 K
10...... H + H H2 + H+ k10 = 6.0 × 10-10 9
11...... H2 + H+ H + H k11= dex 102T ≤ 108 K 10
12...... H+ e H + 2e k12 = exp[–18.018 493 342 73 1
+ 2.360 852 208 681 lnTe
– 2.827 443 061 704 × 10-1 (ln Te)2
+ 1.623 316 639 567 × 10-2 (ln Te)3
– 3.365 012 031 362 999 × 10-2 (ln Te)4
+ 1.178 329 782 711 × 10-2 (ln Te)5
– 1.656 194 699 504 × 10-3 (ln Te)6
+ 1.068 275 202 678 × 10-4 (ln Te)7
– 2.631 285 809 207 × 10-6 (ln Te)8]

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