Anti-Stokes kab muaj nyob rau hauv fluorescence thiab nyob rau hauv Raman spectra thaum lub atoms los yog molecules ntawm cov khoom twb nyob rau hauv ib tug zoo siab lub xeev (raws li thaum kub siab). … Qhov txawv ntawm zaus lossis wavelength ntawm lub emission thiab absorbed teeb yog hu ua Stokes hloov.
Dab tsi ua rau Stokes hloov pauv rau Raman?
Kev hloov pauv ntawm Stokes feem ntau yog tshwm sim los ntawm ob qhov tshwm sim: vibrational so lossis dissipation thiab hnyav reorganization. Ib tug fluorophore yog ib tug dipole, surrounded los ntawm cov kuab tshuaj molecules. Thaum lub fluorophore nkag mus rau hauv lub xeev zoo siab, nws lub sijhawm dipole hloov, tab sis nyob ib puag ncig cov kuab tshuaj molecules tsis tuaj yeem kho sai sai.
Raman hloov pauv li cas?
Feem ntau, Raman hloov pauv feem ntau nyob rau hauv wavenumbers, uas muaj units ntawm inverse length (cm-1). Txhawm rau hloov pauv ntawm spectral wavelength, wavenumbers thiab zaus ntawm kev hloov pauv hauv Raman spectrum, peb tau tsim cov applet no los suav Raman hloov pauv thiab bandwidths.
Stokes hloov pauv qhia koj li cas?
Lub Stokes hloov yog lo lus siv los piav qhia qhov sib txawv ntawm lub wavelength uas lub molecule emits lub teeb yog txheeb ze rau lub wavelength uas lub molecule tau zoo siab.
kab twg yog Raman kab?
Cov kab Raman tshwm sim ntawm frequencies v ±vk , qhov twg v yog thawj zaus thiab vkyog tusfrequencies sib xws rau quanta ntawm molecular vibrations lossis rotations.
