Cov txheej txheem:
Video: Dab tsi ua rau spectral broading?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Spectral nthuav dav yog ua rau los ntawm turbulence nyob rau hauv cov ntshav khiav raws li ib txwm homogeneous tshaj tawm ntawm reflective cov qe ntshav liab ua ntau haiv neeg, ua rau pom tseeb. nthuav dav ntawm spectral Doppler waveform.
Ib yam li ntawd, nws raug nug, qhov kev nthuav dav spectral txhais li cas?
Cov spectral qhov rai yog lub meej dub cheeb tsam ntawm lub spectral kab thiab lub hauv paus. Kev nthuav dav ntawm spectral kab thiab filling ntawm lub spectral qhov rai yog hu ua spectral nthuav dav . Spectral nthuav dav yog feem ntau pom nyob rau hauv lub xub ntiag ntawm high flow velocity, ntawm lub branching ntawm ib lub hlab ntsha, los yog nyob rau hauv me me-inch hlab ntsha.
Qhov thib ob, 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.
Ib yam li ntawd, tib neeg nug, kev sib tsoo yog dab tsi?
Kev sib tsoo , los yog Siab 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 kev sib tsoo uas cuam tshuam nrog cov txheej txheem emission. Qhov no muaj feem xyuam rau lub siab, uas yog vim li cas Collisional Broadning qee zaum hu ua Siab Kev nthuav dav.
Dab tsi yog peb yam ua rau txoj kab dav dav hauv atomic spectroscopy?
Lub cev phenomena uas nthuav cov kab spectral yog qhov tseem ceeb hauv qab no:
- Quantum mechanical uncertainty, ΔE, ntawm lub zog tus nqi E ntawm atomic qib uas tsis infinity lifetime: ntuj broaden.
- Thermal (doppler) nthuav dav.
Pom zoo:
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