Photon attenuation yog dab tsi?
Photon attenuation yog dab tsi?

Video: Photon attenuation yog dab tsi?

Video: Photon attenuation yog dab tsi?
Video: 3.1 - Photon beam attenuation and filtration in RT 2024, Kaum ib hlis
Anonim

Attenuation yog qhov kev loj hlob poob ntawm lub zog los ntawm ib tug nqaj raws li nws traverses teeb meem. A photon beam tej zaum attenuated los ntawm ib qho ntawm cov txheej txheem tau piav qhia hauv ntu dhau los. Muaj qee cov ntsiab lus tseem ceeb dua thaum xav txog cov attenuation ntawm photon kab teeb.

Ib yam li ntawd ib tug yuav nug, dab tsi yog txhais los ntawm attenuation coefficient?

Cov linear attenuation coefficient (µ) piav qhia txog ib feem ntawm lub beam ntawm x-rays los yog gamma rays uas yog absorbed los yog tawg rau ib chav tsev thickness ntawm lub absorber. qhov kev siv zog ntawm lub zog kis tau los ntawm cov khoom siv thaum qhov xwm txheej x-ray siv, cov khoom siv thiab cov khoom thickness paub.

hluav taws xob attenuation yog dab tsi? Attenuation . Attenuation yog cov txheej txheem uas tus naj npawb ntawm cov hais los yog photons nkag mus rau hauv lub cev ntawm cov teeb meem raug txo los ntawm kev nqus thiab tawg.

Tsis tas li ntawd, lub teeb attenuation yog dab tsi?

Cov attenuation ntawm lub teeb hais txog qhov txo qis hauv nws qhov kev siv zog thaum nws mus los ntawm qhov nruab nrab vim yog nqus los yog tawg ntawm photons.

Yuav ua li cas koj xam attenuation?

Tus nqi ntawm attenuation nyob rau hauv ib tug muab network yog txiav txim los ntawm tus piv ntawm: Output/Input. Piv txwv li, yog hais tias tus input voltage rau ib lub voj voog yog 1 volt (1V) thiab cov zis voltage yog 1 milli-volt (1mV) ces tus nqi ntawm attenuation yog 1mV / 1V uas yog sib npaug rau 0.001 lossis txo ntawm 1,000th.

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