1. CH3Br agust,www,...Sept09/PPt-011009ak.ppt agust,heima,....Sept09/CH3BR78320-78520-220909avhwak.pxp agust,heima,....Sept09/CH3BR78320-78520-220909bvhwak.pxp

2. 78420 78520 Mw 2h (excitation) Br; 78513.41 CH 3 +

3. Br; 78513.41 2h (excitation)

4. Configuration Term J Level (cm -1 ) 4s24p5 4s24p5 2 P° 3/2 3/2 0 1/2 1/2 3 685.24 4s 2 4p 4 ( 3 P 2 )5s 4 P 5/2 5/2 63 436.45 3/2 3/2 64 907.19 4s 2 4p 4 ( 3 P 1 )5s 4 P 1/2 1/2 66 883.87 4s 2 4p 4 ( 3 P 1 )5s 2 P 3/2 3/2 67 183.58 4s 2 4p 4 ( 3 P 0 )5s 2 P 1/2 1/2 68 970.21 4s 2 4p 4 ( 3 P 2 )5p 4 P° 5/2 5/2 74 672.32 3/2 3/2 75 009.13 1/2 1/2 75 814.00 4s 2 4p 4 ( 3 P 2 )5p 4 D° 7/2 7/2 75 521.50 5/2 5/2 75 697.05 3/2 3/2 76 743.08 4s 2 4p 4 ( 1 D)5s 2 D 5/2 5/2 75 890.33 3/2 3/2 75 908.53 4s 2 4p 4 ( 3 P 1 )5p 2 S° 1/2 1/2 78 076.00 4s 2 4p 4 ( 3 P 1 )5p 2 D° 5/2 5/2 78 511.60 3/2 3/2 78 676.65 Br + signal is observed at 78513.41 cm -1 (2h (exc.)) => 4s 2 4p 5 ( 2 P o ) ->-> 4s 2 4p 4 ( 3 P 1 )5p( 2 D o ) J´´ = 3/2 ->-> J´ = 5/2 i.e.  l=0 (p ->->p)  L = +1(= 2 - 1);  S =0,  J = +1(= 5/2 - 3/2)

5. Br atomic lines which have been observed (see also http://www3.hi.is/~agust/rannsoknir/rempi/ch3br/PPT-180809aak.ppt )http://www3.hi.is/~agust/rannsoknir/rempi/ch3br/PPT-180809aak.ppt correspond to transitions from Ground state (4s24p5 Term: 2P° J = 3/2 Energy = 0) to 4s 2 4p 4 ( 3 P 1 )5p 2 S° 1/2 1/2 78 076.00 4s 2 4p 4 ( 3 P 1 )5p 2 D° 5/2 5/2 78 511.60 3/2 3/2 78 676.65 Based on the energetics (see below) Br(J=3/2) could be formed after two photon excitation to CH 3 Br* as: CH 3 Br* -> CH 2 + H + Br CH 3 Br* -> CH 3 + Br -after which Br + could be formed via Br* resonance excitation

6. 0 20 40 60 80 100 120 CH 3 Br CH 3 Br* CH 3 + Br ( 2 P 3/2 ) x10 3 cm -1 o Abs. due to transition to the repulsive state 78 076.00 78 511.60 78 676.65 CH 2 + H + Br ( 2 P 3/2 ) H 2 + C + H + Br ( 2 P 3/2 ) 24587.8 62447.6 See evaluation in notes 011009;2 92419.1

7. Blown up figure: NB!: Br + > CBr + near78420 cm -1 Mw 78520

8. Mw 2h (excitation) 78320 cm -1 78440 cm -1 C 2 + impurity CBr + Br +

9. CBr + Br + CBr + also Br + > CBr + for region 78320-78440 cm -1 agust,heima,....Sept09/CH3BR78320-78520-220909bvhwak.pxp

10. CBr + Br + agust,heima,....Sept09/CH3BR78320-78520-220909bvhwak.pxp