Hlau phajPuas yog thawj cov kev ua yeeb yam, txhuas yog qhov tseem ceeb tshaj plaws hlau, muaj ntau yam ntxwv tseem ceeb, nyuaj thiab tiv thaiv kev tiv thaiv kev ua haujlwm zoo. Nrog ib tug kuj loj loj thiab ceev, feem ntau yog siv nyob rau hauv zus tau tej cov txhuas roj teeb, acid kev lag luam thiab metallurgical kev lag luam nrog hlau phaj, txhuas yeeb nkab raws li ntaub tu cov khoom, hluav taws xob kev lag luam raws li lead cable sheath thiab fuse. Cov hlau lead uas muaj cov tin thiab antimony yog siv rau kev luam ntawv, cov hlau lead tin alloys yog siv los ua fusible lead electrodes, thiab cov hlau lead plated thiab txhuas plated steel phaj yog siv hauv kev tsim kho kev lag luam. Lead muaj qhov nqus tau zoo ntawm X-ray thiab gamma rays thiab tau siv dav los ua cov ntaub ntawv kho mob rau cov tshuab X-ray thiab cov khoom siv hluav taws xob atomic. Cov txhuas tau los yog yuav raug hloov los ntawm lwm cov ntaub ntawv nyob rau hauv qee qhov chaw vim muaj tshuaj lom thiab kev lag luam. Ib qho tseem ceeb tshaj plaws yog siv hauv kev tiv thaiv hluav taws xob. Ntawm no yog yuav ua li cas cov hlau lead phaj ua lub luag haujlwm tiv thaiv hluav taws xob:
α particle nkag mus tsis muaj zog, ib daim ntawv tuaj yeem thaiv; Kev tiv thaiv txhuas phaj tuaj yeem thaiv tag nrho, tiv thaiv alpha hluav taws xob tsom tsis txhob noj, stained ntawm daim tawv nqaij. Lwm qhov yog beta ray, uas muaj qhov nkag mus rau nruab nrab. Cov phaj hlau tiv thaiv dav dav tuaj yeem thaiv cov kab hluav taws xob feem ntau, tab sis cov kab hluav taws xob beta feem ntau muaj kev tiv thaiv nrog ib qho kev thaiv ntawm qis atomic tooj, thiaj li tsis tsim bremsstrahlung. Thaum kawg, gamma rays yog tsim nrog α thiab β, nrog rau kev nkag mus tau zoo, qee qhov tuab ntawm cov hlau tiv thaiv phaj tuaj yeem thaiv qee qhov kev faib ua feem ntawm gamma rays, kev siv hluav taws xob siv hluav taws xob nrog lub thickness ntawm cov hlau tiv thaiv phaj raws li txoj cai exponential attenuation, theoretically tsis tuaj yeem thaiv tag nrho. Tab sis tsis tas yuav muaj kev thaiv tag nrho. Qhov tseeb, xov tooj cua yog nyob txhua qhov chaw, thiab muaj hluav taws xob nyob rau hauv ib puag ncig qhov chaw, tsuav nws tau khaws cia rau hauv qhov kev txwv tsim nyog.
Lub sij hawm xa tuaj: Plaub Hlis-04-2022