1. I 2 fs REMPI 1) Energetics / excitation calculations....slide 2 2) Absorption spectrum.........................slides 3-6 3)REMPI spectrum................................slide 7 4)(2B+2R)fs-REMPI scheme...................slide 8 5)Effect of laser pulse bandwidth..........slides 10-11 https://notendur.hi.is/agust/rannsoknir/Bergen/2012/I2-100312ak.pxp https://notendur.hi.is/agust/rannsoknir/Bergen/2012/CH3I&I2-limits.xls https://notendur.hi.is/agust/rannsoknir/Bergen/2012/CH3I&I2-limits.xls https://notendur.hi.is/agust/rannsoknir/Bergen/2012/I2-fs-REMPI-100312ak.ppthttps://notendur.hi.is/agust/rannsoknir/Bergen/2012/I2-fs-REMPI-100312ak.ppt

2. https://notendur.hi.is/agust/rannsoknir/Bergen/2012/CH3I&I2-limits.xls B = Blue R = red I2I2 IE=9.3074eV75069.21 exc.B(2) R(2) IE-exc cm-1 nm cm-1 53812.3226906.16371.6621743.324213453.0821256.89 photonsE/cm-1 126906.16 253812.32 367265.4 480718.48 Dalby (v´,0) lines: BB 1hv/cm-12hv 0,026785.3753570.74 1,026906.1653812.32 6,027497.6954995.38

4. Slide 5 Slide 6 In Slide 9

6. https://notendur.hi.is/agust/rannsoknir/Bergen/2012/I2-100312ak.pxp 1hv absorption cross section / nm 50000 cm -1

7. 2hv = 53570.74 …………………………………… 54995.38 cm -1 https://notendur.hi.is/agust/rannsoknir/papers/jms163-541-94.pdf One- color I 2 REMPI 1hv The Dalby system

8. I 2 Rel. Absorption 1980 & See next Slide : Visible absorption I 2 + + e - 75069.21cm -1 Dalby System: I 2 ** <-<- I 2 +2hv for (v´,v´´=0) transitions (v´=0 – 6): 53570.74 - 54995.38 cm-1 https://notendur.hi.is/agust/rannsoknir/papers/jms163-541-94.pdf 26906.16 53812.32 (v´=1,v´´=0) 67265.4 80718.48 E/cm -1 2B 2 x 371.7 nm 2R / 2 x 743.3 nm https://notendur.hi.is/agust/rannsoknir/Bergen/2012/I2-100312ak.pxp (2B + 2R) fs- REMPI of I 2 

9. I2 Abs. shown in slide 8:

10. 2hv = 53570.74 …………………………………… 54995.38 cm -1 https://notendur.hi.is/agust/rannsoknir/papers/jms163-541-94.pdf One- color I 2 REMPI 1hv The Dalby system 7 nm Bandwidth For 1hv(?) https://notendur.hi.is/agust/rannsoknir/Bergen/2012/CH3I&I2-limits.xls

11. NB!: Assuming about 7 nm bandwidth for the fs pulse (Is that correct???) The Dalby system could be split into two – three regions (see slide above) to see effect of changing vibrational energies on lifetimes. Moving to other electronic systems (higher in energy; possibly lower in energy(?)) will allow comparison of electronic states (and vibrational energies) in terms of lifetimes. https://notendur.hi.is/agust/rannsoknir/Bergen/2012/CH3I&I2-limits.xls