摘要
Highresolutionspectralanalysisoflithiumplasmaformedbysingleanddoublelaserablationhasbeenundertakentounderstandtheplume-laserinteraction,especiallyattheearlystagesoftheplasmaplume.Inordertoidentifydifferentatomicprocessesinevolvingplasma,timeresolvedspectralemissionstudiesatdifferentinter-pulsedelayshavebeenperformedforionicandneutrallithiumlinesemittingfromdifferentlevels.Alongwiththeenhancementinemissionintensity,alargelinebroadeningandspectralshift,especiallyinthecaseofexcitedstatetransitionLiI610.3nmhavebeenobservedinthepresenceofthesecondpulse.Thisbroadeningandshiftgraduallydecreasewithincreasingtimedelay.Anotherinterestingfeatureistheappearanceofamulti-componentstructureintheioniclineat548.4nmandthesecomponentschangeconverselyintoasinglestructureatthelaterstagesoftheplasma.Themulti-componentstructuresarecorrelatedwiththepresenceofdifferentvelocity(temperature)distributionsinnon-LTEconditions.AtomicanalysesbycomputingphotonemissivitycoefficientswithanADAScodehavebeenusedtoidentifytheaboveprocesses.
出版日期
2013年03月13日（中国期刊网平台首次上网日期，不代表论文的发表时间）
