Qhov sib txawv tseem ceeb ntawm carbon dating thiab uranium dating yog tias carbon dating siv cov xov tooj cua isotopes ntawm carbon, whereas uranium dating siv uranium, uas yog ib tug xov tooj cua tshuaj.
Carbon dating thiab uranium dating yog ob txoj hauv kev tseem ceeb ntawm kev txiav txim siab hnub nyoog ntawm cov khoom siv organic sib txawv. Peb hu lawv isotopic dating txoj kev. Txoj kev qub tshaj plaws ntawm lawv yog Uranium-Lead dating method. Txawm hais tias nws yog txoj kev pheej hmoo heev, yog tias peb ua tib zoo ua tib zoo, cov txiaj ntsig tau raug siab heev.
Carbon Dating yog dab tsi?
Carbon dating lossis radiocarbon dating yog ib txoj hauv kev los txiav txim lub hnub nyoog ntawm cov khoom siv hauv cov khoom siv hluav taws xob uas siv cov isotopes ntawm cov tshuaj lom neeg carbon. Lub xov tooj cua isotope peb siv rau txoj kev no yog carbon-14. Peb hu nws radiocarbon.
Txoj kev xav tseem ceeb tom qab txoj kev sib tham no yog qhov tseeb tias carbon-14 tas li tsim nyob rau hauv cov huab cua los ntawm kev sib cuam tshuam ntawm cosmic rays thiab atmospheric nitrogen. Tshiab tsim carbon-14 reacts nrog atmospheric oxygen thiab tsim carbon dioxide, uas muaj radiocarbon atoms. Yog li ntawd, peb hu nws radioactive carbon dioxide. Tom qab ntawd, cov pa roj carbon dioxide no tau muab tso rau hauv cov nroj tsuag rau photosynthesis. Los ntawm kev noj cov nroj tsuag no, tsiaj kuj tau txais radiocarbon rau hauv lawv lub cev.
Daim duab 01: Kev lwj ntawm cov pa roj carbon-14
Thaum kawg, thaum cov tsiaj no lossis cov nroj tsuag tuag, kev noj cov tshuaj radiocarbon nres. Tom qab ntawd, cov nyiaj uas twb muaj lawm ntawm carbon-14 nyob rau hauv cov nroj tsuag tuag lossis tsiaj cov teeb meem pib txo qis vim yog cov hluav taws xob tawg ntawm radiocarbon. Yog li, los ntawm kev ntsuas cov pa roj carbon-14 uas muaj nyob rau hauv cov qauv ntawm cov khoom siv organic, peb tuaj yeem txiav txim siab lub sijhawm uas cov nroj tsuag lossis tsiaj tuag. Tsawg dua cov pa roj carbon-14 muaj nyob hauv cov qauv yog tias cov qauv qub.
Peb tuaj yeem txiav txim siab lub hnub nyoog ntawm tus qauv vim peb paub ib nrab-lub neej ntawm carbon-14. Ib nrab-lub neej ntawm cov khoom siv tshuaj yog lub sij hawm ntawm lub sij hawm tom qab uas ib nrab ntawm cov qauv muab yuav tau lwj. Rau carbon-14, ib nrab-lub neej yog hais txog 5730 xyoo. Cov txheej txheem no tseem ceeb heev hauv kev tshawb nrhiav forensic, txiav txim siab lub hnub nyoog ntawm pob txha, thiab lwm yam.
Uranium Dating yog dab tsi?
Uranium yos yog txoj kev qub tshaj plaws ntawm isotopic yos nyob rau hauv uas peb tuaj yeem txiav txim siab hnub nyoog ntawm cov khoom siv organic siv cov tshuaj radioactive tshuaj Uranium. Muaj peb hom txheej txheem no: Uranium-Uranium method, Uranium-Thorium method thiab Uranium-Lead method. Ntawm lawv, Uranium-lead txoj kev yog txoj kev qub tshaj plaws. Tab sis, nws muab qhov tseeb tshaj plaws txawm tias nws muaj kev pheej hmoo siab.
Daim duab 02: Uranium sib ntsib hauv daim duab yooj yim
Hauv Uranium-Uranium txoj kev, peb siv ob lub xov tooj cua sib txawv ntawm Uranium. Cov no yog U-234 thiab U-238. U-238 tau dhau alpha thiab beta lwj thiab tsim Pb-206, uas yog ib qho isotope ruaj khov. Hauv Uranium-Thorium yos txoj kev, peb siv U-234 thiab Th-230 radioisotopes. Txoj kev uranium-lead suav nrog kev lwj ntawm U-238 rau hauv Pb-206 lossis Pb-207 isotopes.
Qhov txawv ntawm Carbon Dating thiab Uranium Dating yog dab tsi?
Muaj ntau txoj kev sib tham isotopic sib txawv. Carbon dating thiab uranium dating yog ob txoj hauv kev. Ntawm lawv, uranium yos txoj kev yog txoj kev qub tshaj plaws. Qhov sib txawv tseem ceeb ntawm carbon dating thiab uranium dating yog tias carbon dating siv radioactive isotopes ntawm carbon w, hereas uranium dating siv uranium, uas yog ib tug xov tooj cua tshuaj.
Hauv qab infographic qhia txog qhov sib txawv ntawm carbon dating thiab uranium dating.
Summary – Carbon Dating vs Uranium Dating
Muaj ntau txoj kev sib tham isotopic sib txawv. Carbon dating thiab uranium dating yog ob txoj hauv kev. Ntawm lawv, uranium yos txoj kev yog txoj kev qub tshaj plaws. Qhov sib txawv tseem ceeb ntawm carbon dating thiab uranium dating yog tias carbon dating siv xov tooj cua isotopes ntawm carbon, whereas uranium dating siv uranium uas yog ib tug radioactive tshuaj keeb.
