Video: Dab tsi yog natural broadening?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Ntuj nthuav dav . Ntuj (qhov tseeb) Kev nthuav dav yog ib qho ua rau ntawm qhov dav Δν nyob rau hauv kab profile muaj nuj nqi φ(ν). Hom kab spectral no nthuav dav tshwm sim los ntawm spontaneous decay rate A10. Ntawd yog, qhov loj dua A's (ceev dua / muaj zog dua, lossis ib qho stepper decay profile) ua rau ntau dua nthuav dav (wide profile muaj nuj nqi).
Tsis tas li ntawd, txoj kab dav dav yog dab tsi?
Kev nthuav dav Nyob rau hauv spectroscopy, qhov kis thoob plaws lub wavelength ntau dua, los yog ntau zaus, ntawm kev nqus kab (dub) los yog emission kab (ci) hauv cov hluav taws xob tau txais los ntawm qee yam khoom. Ntuj nthuav dav yog ib txwm tam sim no, yog tib yam ntawm tag nrho cov wavelengths, thiab yog heev me me.
Tsis tas li ntawd, txoj kab dav dav hauv laser yog dab tsi? Kev nthuav dav hauv laser physics yog lub cev tshwm sim uas cuam tshuam rau spectroscopic kab puab ntawm laser emission profile. Cov laser emission yog vim (excitation thiab tom qab) so ntawm ib tug quantum system (atom, molecule, ion, thiab lwm yam) ntawm ib tug zoo siab lub xeev (siab zog) thiab ib tug qis dua.
Kuj paub, dab tsi ua rau spectral kab broading?
Thermal (doppler) nthuav dav . Nws yog vim lub doppler hloov ua rau los ntawm cov lus tsa suab, txheeb ze rau tus soj ntsuam, ntawm cov atoms uas emit lub teeb. Kev sib tsoo ntawm cov atom zoo siab uas ua rau muaj kev hloov pauv hluav taws xob thiab qhov tshwm sim ntawm lub teeb.
Koj txhais li cas los ntawm Doppler broading ntawm spectral kab?
Hauv atomic physics, Doppler nthuav dav yog cov Kev nthuav dav ntawm spectral kab vim o Doppler Cov nyhuv tshwm sim los ntawm kev faib tawm nrawm ntawm atoms lossis molecules. Qhov no tshwm sim kab profile hu ua a Doppler profile. Ib rooj plaub tshwj xeeb yog thermal Doppler nthuav dav vim thermal txav ntawm cov khoom.
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