Spectroscopy calculations and ideas as web pages: overlap factors, beam alignment and spectrum processing, moved from Igor Pro into the browser so they are easy to use. Every page is kept here as a copy, so the handbook is one site. Click a preview or a title to open a page; "source" opens the page's own repository and "also at" its standalone site.
Two harmonic potential energy surfaces. Set ωg, ωe, the displacement and the starting level v″; the page gives every overlap ⟨χ′|χ″⟩, the Franck–Condon factors and the vibronic stick spectrum, with the closed form for each row.
Notation from McHale, Molecular Spectroscopy. source
Pump and probe Gaussian beams crossing in a sample. The intensity-weighted overlap fv and the absolute overlap η for 2PA, transient absorption and 2P-excited TA, with the crossing plane, the beam cross-section, an overlap map and delay and position scans.
source · also at beamoverlap.koemel.net
Steer the pump with a kinematic mirror and slide the delay stage until the pulses meet in the sample. The cyclohexane Raman spectrum grows as you get closer; hold 95 % overlap to lock in. Three beams per game and three levels; hard has 50 fs pulses and small beams.
source · also at beamoverlap.game.koemel.net. Best times are kept per site, in your browser.
A pump and a probe spot drift around a black screen and bounce off the edges, like the old bouncing-logo
screensaver. Where they cross, the signal glows white and the corner shows the overlap. Each load picks new
colours, waists and pulse lengths; add a seed to the address (#48213, #classic) to
keep one. Double-click for full screen.
Also at screensaver.overlap.koemel.net
Removes solvent Raman bands from a spectrum, written for FSRS data. Load Igor Pro waves (.ibw, .itx, .pxp) or text, fit the solvent by a scale factor, a Taylor expansion (shift and broadening) or an exact shift-and-broadening model, and download the result as an Igor wave.
franck-condon/, focal-overlap/,
overlap-game/, screensaver/, solvent-subtraction/): open its index.html and it runs with
no server or build step. The calculation pages list their model and equations at the bottom.node franck-condon/tests/validate.mjs), which check the calculation against closed forms and
numerical integration; their repositories' READMEs give the numbers.Source of this page: github.com/CrestK/Spectroscopist-Handbook