Qee lub ntsiab lus hnyav hauv lub rooj zaum yog tsim thaum khub ntawm neutron hnub qub sib tsoo cataclysmically thiab tawg, cov kws tshawb fawb tau pom thawj zaug. Lub teeb lub teeb xws li hydrogen thiab helium tsim thaum lub sij hawm loj bang, thiab cov mus txog hlau yog tsim los ntawm fusion nyob rau hauv lub cores ntawm hnub qub.
Thaum twg cov ntsiab lus hnyav dua?
Tag nrho cov hydrogen thiab feem ntau ntawm cov helium hauv ntiaj teb tau tshwm sim 13.8 billion xyoo dhau los los ntawm Big Bang. Cov seem ntawm cov tshuaj lom neeg, tshwj tsis yog rau me me ntawm lithium, tau tsim nyob rau hauv stellar interiors, supernova explosions, thiab neutron-star mergers.
Vim li cas thiaj ua tsis tau cov ntsiab lus hnyav dua?
Cov ntsiab lus hnyav tuaj yeem tsim tsis tau tom qab Loj Bang vim tias tsis muaj cov nuclei ruaj khov nrog 5 lossis 8 nucleons.
Lub caij hnyav tshaj plaws uas tuaj yeem tsim tau yog dab tsi?
Lub caij hnyav tshaj plaws uas tshwm sim hauv ntau yog uranium (atomic tooj 92). Koj tuaj yeem ua kuv li kub. Technetium (atomic tooj 43) tsis tshwm sim lawm. Promethium (atomic tooj 61) tsis tshwm sim lawm.
Txhua yam hnyav dua tuaj qhov twg?
Lub ntiaj teb peb lub teeb tshaj plaws - hydrogen, helium thiab lithium - tau tsim nyob rau lub sijhawm ntxov ntawm cosmos, tsuas yog tom qab lub Big Bang. Feem ntau ntawm cov ntsiab lus hnyav dua lithium, mus txog rau cov hlau ntawm lub sij hawm lub rooj, tau forged billions xyoo. Tom qab ntawd, hauv cov cores ntawm cov hnub qub.
