Qhov sib txawv tseem ceeb ntawm fission thiab fragmentation yog qhov fission yog cov txheej txheem ntawm kev faib cov atomic nucleus rau hauv ob los yog ntau dua nuclei me me whereas fragmentation yog dissociation ntawm unstable ions los ntawm molecules.
Fission tseem ceeb heev hauv nuclear physics vim nws txhawj xeeb txog kev tsim hluav taws xob siv nuclear fission tshwm sim txij li kev sib cais ntawm lub atomic nucleus tuaj yeem ua rau muaj zog ntau heev. Fragmentation, ntawm qhov tod tes, tseem ceeb heev hauv huab hwm coj spectrometry vim peb siv cov txheej txheem no los tshuaj xyuas cov molecules sib txawv.
Fission yog dab tsi?
Fission hauv nuclear physics thiab nuclear chemistry yog txheej txheem uas lub atomic nucleus faib ua ob lossis ntau lub nuclei. Peb hu qhov no yog cov tshuaj tiv thaiv nuclear lossis feem ntau yog cov xov tooj cua tawg. Feem ntau, cov txheej txheem no tsim cov neutrons dawb nrog rau gamma rays. Ntxiv mus, qhov tshuaj tiv thaiv no ua rau lub zog siab uas tuaj yeem siv rau ntau lub hom phiaj. Sib nrug los ntawm cov neutrons dawb thiab gamma rays, qhov no kuj tsim ib co lwm yam fragments xws li alpha thiab beta hais.
Daim duab 01: A Nuclear Fission Reaction
Tsis tas li ntawd, fission feem ntau yog cov tshuaj tiv thaiv exothermic uas tso tawm nuclear zog raws li lub zog kinetic ntawm cov khoom tawg. Txij li cov khoom ntawm cov tshuaj tiv thaiv nuclear sib txawv ntawm cov ntsiab lus ntawm thawj atom, nws yog cov txheej txheem hloov hluav taws xob nuclear.
Fragmentation yog dab tsi?
Fragmentation hauv chemistry yog kev sib cais ntawm ions los ntawm cov molecule. Ntawm no, lub zog tsis ruaj khov ions tuaj yeem tawm ntawm cov molecule. Tsis tas li ntawd, qhov no tshwm sim hauv ionization chamber ntawm huab hwm coj spectrometer. Cov khoom uas tshwm sim yog hu ua fragments. Ntxiv mus, cov fragments no tuaj yeem tsim tau ib qho qauv - qhov loj spectrum. Thiab, qhov loj spectrum no tshwj xeeb rau ib qho molecule, yog li, nws yog qhov tseem ceeb hauv kev txheeb xyuas. Tsis tas li ntawd, cov qauv fragmentation muaj txiaj ntsig zoo hauv kev txiav txim siab qhov hnyav molecular thiab txawm tias cov qauv ntawm cov molecule.
Daim duab 02: Ib qho piv txwv ntawm Fragmentation
Muaj ntau yam kev cuam tshuam cuam tshuam nrog kev tawg thaum lub sijhawm huab hwm coj;
1. Tej yam yooj yim daim ntawv cog lus cleavage reactions
2. Radical site-initiated fragmentation
3. Charge-site pib fragmentation
4. Rearrangement reactions
Qhov txawv ntawm Fission thiab Fragmentation yog dab tsi?
Fission hauv nuclear physics thiab nuclear chemistry yog txheej txheem uas atomic nucleus faib ua ob lossis ntau lub nuclei thaum tawg hauv chemistry yog kev sib cais ntawm ions los ntawm cov molecule. Yog li, qhov sib txawv tseem ceeb ntawm fission thiab fragmentation yog qhov fission yog cov txheej txheem ntawm kev faib cov atomic nucleus rau hauv ob los yog ntau dua nuclei me me whereas fragmentation yog dissociation ntawm unstable ions los ntawm molecules.
Lwm qhov sib txawv tseem ceeb ntawm fission thiab fragmentation yog tias fission yog qhov tseem ceeb rau kev tsim cov hluav taws xob nuclear thaum fragmentation muaj txiaj ntsig zoo rau huab hwm coj spectrometry - rau kev txheeb xyuas cov qauv thiab molar qhov hnyav ntawm lub molecule.
Summary – Fission vs Fragmentation
Fission hauv nuclear physics thiab nuclear chemistry yog txheej txheem uas lub atomic nucleus faib ua ob lossis ntau lub nuclei. thaum fragmentation nyob rau hauv chemistry yog tus txheej txheem ntawm dissociation ntawm ions los ntawm ib tug molecule. Qhov sib txawv tseem ceeb ntawm fission thiab fragmentation yog tias fission yog cov txheej txheem ntawm kev faib cov atomic nucleus rau hauv ob los yog ntau dua nuclei me me whereas fragmentation yog tus txheej txheem ntawm dissociation ntawm unstable ions los ntawm molecules.
