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Energetics and Excitation Calculations in REMPI Spectroscopy

Explore the energetics and excitation calculations in REMPI spectroscopy, including absorption and REMPI spectra analysis. Understand the effect of laser pulse bandwidth and visualize the absorption cross section. Compare electronic states and vibrational energies for in-depth analysis. Visit the provided links for detailed information.

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Energetics and Excitation Calculations in REMPI Spectroscopy

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  1. I2 fs REMPI • 1) Energetics / excitation calculations....slide 2 • 2) Absorption spectrum.........................slides 3-6 • REMPI spectrum................................slide 7 • (2B+2R)fs-REMPI scheme...................slide 8 • 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.xlshttps://notendur.hi.is/agust/rannsoknir/Bergen/2012/I2-fs-REMPI-100312ak.ppt

  2. B = Blue R = red https://notendur.hi.is/agust/rannsoknir/Bergen/2012/CH3I&I2-limits.xls

  3. Slide 5 In Slide 9 Slide 6

  4. 1hv absorption cross section l / nm 50000 cm-1 https://notendur.hi.is/agust/rannsoknir/Bergen/2012/I2-100312ak.pxp

  5. One- color I2 REMPI 2hv = 53570.74 …………………………………… 54995.38 cm-1 The Dalby system 1hv https://notendur.hi.is/agust/rannsoknir/papers/jms163-541-94.pdf

  6. E/cm-1 80718.48 (2B + 2R) fs- REMPI of I2 I2+ + e- 75069.21cm-1 2R / 2 x 743.3 nm 67265.4 53812.32 (v´=1,v´´=0) I2 Rel. Absorption 1980 & See next Slide : : Visible absorption s Dalby System: I2** <-<- I2 +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 2B 2 x 371.7 nm 26906.16 https://notendur.hi.is/agust/rannsoknir/Bergen/2012/I2-100312ak.pxp

  7. I2 Abs. shown in slide 8:

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

  9. 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

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