1. CH3Br, 031209 1)PD summary status 2)Thresholds for direct excitations 3)CH3+ formation energetics / thresholds (direct and indirect)/ PD agust, heima,.....Dec09/CH3Br-Overall +mass-221109km-031209ak.pxp agust,www,...Dec09/PPT-031209ak.ppt

2. PD ready PD NOT ready

3. Br+(3) CH2Br+(3) CHBr+(5) CBr+ (5)(4) CH3+ (3) (2) CH2+ (4) (3) CH+ (5) (4) C+ (6) (5) (4) Thresholds for direct excitations / number of photons required: (n)

4. CH3+ formation energetics:

5. 0 20K 40K 60K 80K 100K CH3 + Br (24587.8 cm-1 http://www3.hi.is/~agust/rannsoknir/rempi/ch3br/CH3-Br bond energy-070709ak.ppt ) http://www3.hi.is/~agust/rannsoknir/rempi/ch3br/CH3-Br bond energy-070709ak.ppt CH3Br CH3+ + Br- (76695 cm-1; t. Ridley, 2008) CH3+ + Br + e- (103953 cm-1; 24587.8+ IE/ 79364.91 / 9.84eV: http://webbook.nist.gov/cgi/cbook.cgi?ID=C2229074&Units=SI&Mask=20#Ion-Energeticshttp://webbook.nist.gov/cgi/cbook.cgi?ID=C2229074&Units=SI&Mask=20#Ion-Energetics ) 66020 (2) 33010 (1) 57598 (3) 90608 (4) 69302 (2) 76695 (2) (3) 79365 (2) CH3+ formation energetics:

6. 69302 Direct: CH3+ + Br + e- (3 = 2+1) 76695 Direct: CH3+ + Br- (2 = 2+0) 79365 Indirect via CH3 + Br (4 = 2+2) CH3+ formation energetics: (2.5)old (2.2)old 3.3 4.0? 3.1 3.0 3.1 2.9 3.2 2.8 2.9 CH3+