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廈門西林社一出租房3樓動怒 1人和4煤氣罐被救出

時間:2025-05-15 05:40:08 來源:網絡整理 編輯:娛樂

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BEIJING,Feb.22(Xinhua)--Chineseresearchershavesynthesizedtwonewnucleusisotopesthatcontain84neutronsa

BEIJING,Feb.22(Xinhua)--Chineseresearchershavesynthesizedtwonewnucleusisotopesthatcontain84neutronsand82neutrons,accordingtoarecentresearcharticlepublishedinthejournalPhysicalReviewLetters.Thenucleusiscomposedofprotonsandneutrons.Differentnumbersofprotonsandneutronsmakeupnucleiwithdifferentpropertieswhichwerecallednucleusisotopesbyscientists.Thesynthesisandstudyofnewnucleusisotopesareofgreatsignificanceforunderstandingboththestructureofmatterandtheevolutionofthecelestialenvironment.Previousexperimentsonproton-richnucleithatcontainaround126neutronsshowedthatahigherprotonnumbereventuallyrendersthenucleusunstable.Toseeifthesamebehavioroccursfornucleithatcontainaround82neutrons,theresearchersfromtheInstituteofModernPhysics,ChineseAcademyofSciences,studiedtheosmium-160.Theysynthesizedosmium-160andwolframium-156andfoundthattheosmium-160contains84neutronsand76protons,moreprotonsthananyother84-neutronnucleus.Thestudyillustratestheevolutionofaneutronshellwith82neutronsontheneutron-deficientsideofthenucleusisotopes.
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