Video: Dab tsi yog ib nrab nqi txheej ntawm txhuas?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Ib nrab - Txheej Txheem . Lub thickness ntawm cov khoom muab qhov twg 50% ntawm qhov teeb meem lub zog tau raug txo qis yog paub tias yog ib nrab - tus nqi txheej ( HVL ). Cov HVL yog qhia nyob rau hauv units ntawm qhov deb (mm los yog cm).
Tsis tas li lo lus nug yog, dab tsi yog ib nrab nqi txheej?
Ib cov ntaub ntawv ib nrab - tus nqi txheej ( HVL ), los yog ib nrab - tus nqi tuab, yog cov thickness ntawm cov khoom uas qhov kev siv ntawm hluav taws xob nkag mus rau nws yog txo los ntawm ib tug ib nrab.
Ib sab saum toj no, vim li cas ib nrab nqi txheej tseem ceeb? Ib nrab nqi txheej . HVL yog ib tseem ceeb Kev tswj xyuas zoo raws li nws yog siv los ntsuas seb puas muaj kev pom txaus hauv lub x-ray beam kom tshem tawm cov hluav taws xob tsawg, uas tuaj yeem ua rau puas tsuaj. Nws tseem yuav pab txiav txim seb hom thiab thickness ntawm shielding xav tau nyob rau hauv qhov chaw.
Ib sab ntawm no, koj ua li cas thiaj nrhiav tau ib nrab nqi ntawm ib txheej?
Cov ib nrab - tus nqi txheej formula is HVL = = 0.693/Μ. Muab koj cov lus teb los ntawm 10 los qhia koj HVL hauv millimeters. Qhov no yog qhov tsim nyog vim tias muaj ntau cov coefficients attenuation tau muab nrog cov units cm-1, thiab qee qhov HVL tau qhia hauv mm. Koj cov lus teb kuj tuaj yeem muab faib ua 0.39 los hloov cov centimeters rau ntiv tes.
Ntev npaum li cas yuav tsum ua rau thaiv hluav taws xob?
Cov ntaub thaiv npog yuav tsum yog li 13.8 feet ntawm dej, txog 6.6 feet ntawm pob zeb, lossis txog 1.3 feet ntawm coj . tuab , ntom thaiv yog tsim nyog tiv thaiv tiv thaiv gamma rays. Qhov siab dua lub zog ntawm gamma ray, lub tuab dua daim thaiv yuav tsum ua. X-rays ua rau muaj kev sib tw zoo sib xws.
Pom zoo:
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