Video: TVL suav li cas?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Ib nrab nqi txheej (HVL) thiab kaum tus nqi txheej ( TVL ) yog txhais raws li lub thickness ntawm ib daim ntaub thaiv npog los yog ib tug absorber uas txo cov hluav taws xob theem los ntawm ib feem ntawm ib nrab thiab ib feem kaum ntawm thawj theem, feem. Hauv qhov kev tshawb fawb no, TVL thiab HVL thickness yog xam rau cov pob zeb uas muaj qhov sib txawv.
Tom qab ntawd, ib tus tuaj yeem nug, HVL suav li cas?
Txiav txim siab qhov attenuation coefficient ntawm cov khoom. Qhov no tuaj yeem pom hauv lub rooj ntawm attenuation coefficient lossis los ntawm cov chaw tsim khoom ntawm cov khoom. Faib 0.693 los ntawm attenuation coefficient los txiav txim qhov HVL . Ib nrab nqi txheej qauv yog HVL = = 0,693/Μ.
Ib tug kuj yuav nug, 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 yam li ntawd, nws raug nug, yuav tsum ua kom tuab npaum li cas los 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.
HVL yog dab tsi hauv hluav taws xob?
Ib nrab nqi txheej ( HVL ) yog qhov dav ntawm cov khoom yuav tsum tau txo cov cua kerma ntawm ib qho x-ray los yog gamma-ray mus rau ib nrab ntawm nws tus nqi qub. Qhov no siv rau nqaim beam geometry nkaus xwb raws li broad-beam geometry yuav muaj kev cuam tshuam loj heev, uas yuav ua rau qis qis qis ntawm qhov attenuation. HVL = 0.693 / Μ
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