Cosmic ray spallation yog xav tias yog lub luag haujlwm rau kev nplua nuj nyob hauv lub ntiaj teb ntawm qee lub teeb-lithium, beryllium, thiab boron-zoo li cov isotope helium-3. … Boron tuaj yeem tsim ncaj qha. Cov beryllium thiab boron raug coj los nag los rau hauv av.
feem ntau ntawm cov boron thiab beryllium nyob rau hauv lub ntug tuaj qhov twg?
Ob lub ntsiab lus no, tsis yog coincidentally, kuj tau khi ua ke hauv lawv lub hauv paus, rau tag nrho cov beryllium thiab feem ntau boron yog tsim tob hauv qhov chaw los ntawm cosmic rays. Tsuas yog lithium thiab deuterium, ib qho isotope ntawm hydrogen, qhia qhov keeb kwm no.
cosmic rays muaj dab tsi?
Cosmic rays originate ua thawj cosmic rays, uas yog cov Ameslikas tsim nyob rau hauv ntau yam astrophysical txheej txheem. Thawj cosmic rays yog tsim los ntawm protons thiab alpha particles(99%), nrog me me ntawm hnyav dua nuclei (≈1%) thiab ib feem tsawg kawg nkaus ntawm positrons thiab antiprotons.
Lithium beryllium thiab boron ua li cas?
Boron thiab beryllium yog tsim los ntawm kev sib tsoo ntawm protons hauv cosmic rays nrog carbon atoms, thaum lithium tuaj yeem tsim los ntawm kev sib tsoo ntawm ntau tshaj helium atoms hauv cosmic rays nrog lwm yam helium nuclei. … Yog li boron thiab beryllium abundances muab qhia rau keeb kwm ntawm lub galaxy thiab tseeb ntawm lub ntug.
Cov khoom hnyav npaum li cas yog tsim thaum lub sijhawmnucleosynthesis?
Lub hnub qub tsim nyob rau hauv lub ntiaj teb thaum ntxov tsim cov ntsiab lus hnyav los ntawm kev sib xyaw nws cov nuclei sib zog - hydrogen, helium, lithium, beryllium, thiab boron - uas tau pom nyob rau hauv thawj qhov sib xyaw ntawm lub hnub qub nruab nrab thiab yog li lub hnub qub.
