LADP-1 Kev Tshawb Fawb Txheej Txheem ntawm CW NMR - Qauv Qis

Nuclear magnetic resonance (NMR) yog ib hom resonance kev hloov pauv tshwm sim los ntawm electromagnetic yoj hauv qhov chaw sib nqus. Txij li cov kev tshawb fawb no tau coj tawm xyoo 1946, cov hau kev thiab cov txheej txheem ntawm nuclear magnetic resonance (NMR) tau tsim kho sai sai thiab siv dav vim tias lawv tuaj yeem nkag mus tob rau hauv cov khoom siv yam tsis muaj kev rhuav tshem cov qauv, thiab muaj qhov zoo ntawm kev nrawm, raug thiab qhov siab kev daws teeb meem. Tam sim no, lawv tau nkag mus los ntawm physics mus rau chemistry, biology, geology, kev kho mob, ntaub ntawv thiab lwm yam kev cai, ua si lub luag haujlwm loj hauv kev tshawb fawb thiab kev tsim khoom.

Kev piav qhia 

Xaiv yeem: Feem ntau cov 'meter', tus kheej npaj ntawm oscilloscope

Qhov kev sim ntawm lub zog txuas ntxiv mus yoj hluav taws xob nuclear sib nqus sib zog (CW-NMR) muaj cov hlau nplaum sib luag siab siab thiab lub tshuab loj tseem ceeb. Cov hlau nplaum ruaj khov yog siv los muab cov khoom sib nqus ntawm cov teb sib nqus superimposed los ntawm qhov chaw hloov kho hluav taws xob, tsim los ntawm ob peb lub kauj, kom muaj kev hloov kho kom zoo rau tag nrho cov chaw sib nqus thiab kom them cov kev sib pauv hloov magnetic teb los ntawm qhov ntsuas kub.

Vim tias tsuas yog kev sib nqus me me tam sim no xav tau rau qhov chaw qis hluav taws xob tsawg, qhov teeb meem cua sov ntawm lub zog yog qhov tsawg heev. Yog li, lub kaw lus yuav ua haujlwm tsis tu ncua rau ntau teev. Nws yog qhov khoom siv sim zoo tshaj plaws rau qib siab ntawm lub chaw soj nstuam.

Cov Lus Qhia Tshwj Xeeb

Kev sim

1. Txhawm rau soj ntsuam qhov muaj hlau nplaum nuclear resonance (NMR) qhov tshwm sim ntawm hydrogen nuclei hauv dej thiab piv cov cawv ntawm paramagnetic ions;

2. Txhawm rau ntsuas qhov ntsuas ntawm hydrogen nuclei thiab fluorine nuclei, xws li tig sib nqus sib piv, Lande g zoo, thiab lwm yam.