Qhov sib txawv tseem ceeb ntawm electron thiab neutron diffraction yog tias electrons tau tawg los ntawm atomic electrons, whereas neutrons tawg los ntawm atomic nuclei.
Electron diffraction yog nthwv dej ntawm electrons. Neutron diffraction yog qhov tshwm sim ntawm elastic neutron scattering. Feem ntau, electron diffraction piav txog qhov zoo li nthwv dej, thaum neutron diffraction piav txog atomic thiab / lossis magnetic qauv ntawm cov khoom.
Electron Diffraction yog dab tsi?
Electron diffraction yog nthwv dej ntawm electrons. Xyaum, nws yog cov txheej txheem uas yog siv los kawm txog qhov teeb meem los ntawm kev tua hluav taws xob ntawm tus qauv thiab saib xyuas qhov cuam tshuam cov qauv. Peb feem ntau hu qhov tshwm sim no lub nthwv dej-particle dual. Nws hais tias ib qho me me ntawm cov teeb meem coj li nthwv dej. Yog li ntawd, ib qho hluav taws xob tuaj yeem suav tias yog nthwv dej zoo ib yam li suab lossis dej nthwv dej. Cov txheej txheem electron diffraction zoo ib yam li X-ray diffraction thiab neutron diffraction cov txheej txheem.
Feem ntau, electron diffraction yog qhov tseem ceeb hauv lub xeev physics thiab chemistry rau kev nkag siab ntawm cov qauv siv lead ua ntawm cov khib nyiab. Feem ntau, peb tuaj yeem ua qhov kev sim no hauv kev xa hluav taws xob hluav taws xob (TEM) lossis scanning electron microscope (SEM). Cov cuab yeej no siv cov khoom siv hluav taws xob uas tau nrawm los ntawm lub peev xwm electrostatic kom tau txais lub zog xav tau thiab txiav txim siab lub wavelength ua ntej kev sib cuam tshuam nrog cov qauv ntawm kev ntshaw.
Daim duab 01: Ib Hom Electron Diffraction Pattern
Txawm hais tias cov txheej txheem no yog qhov tseem ceeb hauv kev tshawb fawb ntawm cov pob zeb zoo ib ntus xws li electron crystallography, nws kuj tseem muaj txiaj ntsig hauv kev kawm luv luv ntawm kev txiav txim siab ntawm amorphous solids, luv luv txiav txim siab ntawm qhov tsis zoo nrog rau cov neeg ua haujlwm. Geometry ntawm gaseous molecules, thiab lwm yam.
Neutron Diffraction yog dab tsi?
Neutron diffraction yog qhov tshwm sim ntawm elastic neutron tawg. Nws yog daim ntawv thov ntawm neutron scattering los txiav txim siab atomic thiab / lossis magnetic qauv ntawm cov khoom. Peb yuav tsum tso cov qauv mus kuaj rau hauv ib lub teeb ntawm thermal lossis txias neutrons. Tom qab ntawd peb tuaj yeem tau txais tus qauv diffraction uas tuaj yeem muab cov ntaub ntawv ntawm cov qauv ntawm cov khoom.
Daim duab 02: Neutron Diffraction uas siv tau rau hauv Molecular Stimulations
Txoj kev neutron diffraction zoo ib yam li X-ray diffraction. Txawm li cas los xij, vim muaj cov khoom sib txawv, cov neutrons thiab X-rays zoo li muab cov ntaub ntawv ntxiv; Piv txwv li, X-rays haum rau kev tsom xam, muaj zog X-rays los ntawm cov hluav taws xob synchrotron yog haum rau qhov tob tob lossis nyias cov qauv, thiab lwm yam.
Feem ntau, cov txheej txheem neutron diffraction yuav tsum muaj qhov chaw ntawm cov neutrons uas tsim nyob rau hauv lub reactor nuclear los yog qhov chaw spallation. Yog tias peb siv lub tshuab hluav taws xob tshawb fawb, peb xav tau lwm yam khoom xws li siv lead ua monochromator, cov ntxaij lim dej los xaiv cov neutron wavelength, thiab lwm yam.
Qhov txawv ntawm Electron thiab Neutron Diffraction
Electrons thiab neutron diffraction yog cov txheej txheem kev tshuaj xyuas tseem ceeb. Qhov sib txawv tseem ceeb ntawm electron thiab neutron diffraction yog tias electrons tawg los ntawm atomic electrons, hos neutrons tawg los ntawm atomic nuclei. Ntxiv mus, electron diffraction yog yoj xwm ntawm electrons. Neutron diffraction yog qhov tshwm sim ntawm elastic neutron scattering. Feem ntau, electron diffraction piav txog qhov zoo li nthwv dej, thaum neutron diffraction piav txog atomic thiab / lossis magnetic qauv ntawm cov khoom.
Hauv qab no yog cov ntsiab lus ntawm qhov sib txawv ntawm electron thiab neutron diffraction hauv daim ntawv tabular rau ib sab ntawm kev sib piv.
Summary – Electron vs Neutron Diffraction
Electron diffraction yog nthwv dej ntawm electrons. Neutron diffraction yog qhov tshwm sim ntawm elastic neutron scattering. Qhov sib txawv tseem ceeb ntawm electron thiab neutron diffraction yog tias electrons tawg los ntawm atomic electrons, hos neutrons tawg los ntawm atomic nuclei. Feem ntau, electron diffraction piav txog qhov zoo li nthwv dej, thaum neutron diffraction piav txog atomic thiab / lossis magnetic qauv ntawm cov khoom.
