Bragg txoj cai Nyob rau hauv crystallography, txoj cai uas piav txog yuav ua li cas an X-ray beam yog reflected los yog disfracted nyob rau hauv ib tug siv lead ua lattice, muab los ntawm Bragg sib npaug nλ - 2dsinθ qhov twg n yog ib tug integer, λ yog lub wavelength ntawm qhov teeb meem-beam X-ray, d yog qhov sib nrug ntawm cov siv lead ua dav hlau (d spacing), thiab θ yog lub kaum sab xis ntawm …
N yog dab tsi hauv Bragg's equation?
Ntawm no yog qhov sib nrug ntawm cov dav hlau lattice, θ yog lub kaum sab xis ntawm lub kaum sab xis, λ yog lub neutron wavelength, thiab n yog qhov kev txiav txim siab. Bragg txoj cai lij choj yog qhov tshwm sim ntawm geometric qhov tshwm sim ntawm nthwv dej tawg hauv cov siv lead ua yog li nws tseem ceeb tsis txawv rau cov neutrons thiab x rays.
N yog dab tsi hauv Xray Diffraction?
X-ray diffraction (XRD) tso siab rau ntawm ob nthwv dej / qhov xwm txheej ntawm X-ray kom tau txais cov ntaub ntawv hais txog cov qauv ntawm cov ntaub ntawv crystalline. … Qhov sib txawv ntawm X-rays los ntawm cov muaju yog piav qhia los ntawm Bragg Txoj Cai, n(lambda)=2d sin(theta).
Vim li cas Cu thiaj siv hauv XRD?
Cu yog qhov kev sib haum xeeb zoo rau cov hmoov sib txawv ntawm ntau lub tebchaw. … Lwm qhov laj thawj ntawm Cu tube yognws yooj yim dua txias anode vim nws muaj qhov ua tau zoo, yog li nws tuaj yeem ua haujlwm ntawm qhov hluav taws xob siab (nce kev siv) thiab raj lub neej feem ntau zoo dua. ib co lwm anodes siv tib lub txias.
Dab tsi tshwm sim hauv Fresnel diffraction?
Fresnel diffractiontshwm sim thaum txawm qhov kev ncua deb ntawm qhov chaw mus rau qhov kev cuam tshuam lossis qhov kev ncua deb ntawm qhov thaiv mus rau qhov screen yog piv rau qhov loj ntawm qhov thaiv. Cov kev sib piv thiab qhov loj me no ua rau tus cwj pwm txawv txawv.
