Lifetimes (in yrs) Photo dissociation t PD = 10 3 AB + h A + B 2-body collisions t 2B = 10 3 /n A + B AB* A + B Radiative association t RA = 10 9 /n yrs A + B AB* AB + h Grain sticking t GS = 10 9 /n yrs A + B + Gr AB + Gr 3 - body collision t 3B = / n 2 A + B + M MAB AB + M t (BIG U) = yrs n number of atoms or molecules per cm 3 Harry Kroto 2004
Lifetimes (in yrs) Photo dissociation t PD = 10 3 AB + h A + B 2-body collisions t 2B = 10 3 /n A + B AB* A + B Radiative association t RA = 10 9 /n yrs A + B AB* AB + h Grain sticking t GS = 10 9 /n yrs A + B + Gr AB + Gr 3 - body collision t 3B = / n 2 A + B + M MAB AB + M t (BIG U) = yrs n number of atoms or molecules per cm 3 Harry Kroto 2004
Lifetimes (in yrs) Photo dissociation t PD = 10 3 AB + h A + B 2-body collisions t 2B = 10 3 /n A + B AB* A + B Radiative association t RA = 10 9 /n yrs A + B AB* AB + h Grain sticking t GS = 10 9 /n yrs A + B + Gr AB + Gr 3 - body collision t 3B = / n 2 A + B + M MAB AB + M t (BIG U) = yrs n number of atoms or molecules per cm 3 Harry Kroto 2004
Lifetimes (in yrs) Photo dissociation t PD = 10 3 AB + h A + B 2-body collisions t 2B = 10 3 /n A + B AB* A + B Radiative association t RA = 10 9 /n yrs A + B AB* AB + h Grain sticking t GS = 10 9 /n yrs A + B + Gr AB + Gr 3 - body collision t 3B = / n 2 A + B + M MAB AB + M t (BIG U) = yrs n number of atoms or molecules per cm 3 Harry Kroto 2004
Lifetimes (in yrs) Photo dissociation t PD = 10 3 AB + h A + B 2-body collisions t 2B = 10 3 /n A + B AB* A + B Radiative association t RA = 10 9 /n yrs A + B AB* AB + h Grain sticking t GS = 10 9 /n yrs A + B + Gr AB + Gr 3 - body collision t 3B = / n 2 A + B + M MAB AB + M t (BIG U) = yrs n number of atoms or molecules per cm 3 Harry Kroto 2004
Lifetimes (in yrs) Photo dissociation t PD = 10 3 AB + h A + B 2-body collisions t 2B = 10 3 /n A + B AB* A + B Radiative association t RA = 10 9 /n yrs A + B AB* AB + h Grain catalysis t GC = 10 9 /n yrs A + B + Gr AB + Gr 3 - body collision t 3B = / n 2 A + B + M MAB AB + M t (BIG U) = yrs n number of atoms or molecules per cm 3 Harry Kroto 2004
Lifetimes (in yrs) Photo dissociation t PD = 10 3 AB + h A + B 2-body collisions t 2B = 10 3 /n A + B AB* A + B Radiative association t RA = 10 9 /n yrs A + B AB* AB + h Grain sticking t GS = 10 9 /n yrs A + B + Gr AB + Gr 3 - body collision t 3B = / n 2 A + B + M MAB AB + M t (BIG U) = yrs n number of atoms or molecules per cm 3 Harry Kroto 2004