?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.relation=http%3A%2F%2Fd-scholarship-dev.library.pitt.edu%2F6954%2F&rft.title=PENNING+IONIZATION+OF+SMALL+MOLECULES+BY+METASTABLE+NEON&rft.creator=Noroski%2C+Joseph+Harold&rft.description=Penning+ionization+electron+spectroscopy+(PIES)+in+crossed%2C+supersonic+molecular+beams+was+used+to+examine+the+reactions+of+Ne*+(2p53s+3P2%2C+3P0)+with+two+target+molecules%2C+CO2+and+C2H2.+Tentative+peak+assignments+were+made+for+each+reaction%2C+and+the+collision+dynamics+of+these+reactions+were+also+examined+at+various+collision+energies+in+light+of+the+two+potential+model+of+Penning+ionization.+The+2.6+%E2%88%92+3.2+eV+region+of+the+Ne*+%2B+CO2+spectrum+is+assigned+to+a+n%C3%AD1+progression.+The+region+from+2.6+%E2%88%92+2.0+eV+is+more+complex%2C+but+a+n%C3%AD1+%2B+2%C3%AD3+progression+in+addition+to+the+n%C3%AD1+progression+is+very+likely+present.+The+region+below+2.0+eV+contains+a+broad+band+of+signal%2C+but+no+assignments+have+yet+been+made+on+this+region.+The+Ne*+%2B+C2H2+spectrum+has+a+very+well+resolved+%C3%AD2+progression+around+5+eV.+The+A+state+of+the+Ne*+%2B+C2H2+PIES+spectrum+is+present%2C+but+it+can't+be+resolved+with+our+data.+The+Ne*+%2B+CO2+reaction+was+run+at+collision+energies+of+1.73%2C+1.97%2C+2.56%2C+and+3.13+kcal%2Fmol.+A+red+shift+(~+%E2%88%9218+meV)+was+found+for+all+but+the+3.13+kcal%2Fmol+energy%2C+which+was+blue+shifted+(~+18+meV).+This+small+shift%2C+combined+with+broad+peakshapes%2C+indicates+that+ionization+occurs+over+the+positive+and+negative+regions+of+the+Ne*+%2B+CO2+potential+energy+surface%2C+that+is%2C+ionization+straddles+the+zero-crossing+point.+The+Ne*+%2B+C2H2+reaction+was+run+at+collision+energies+of+1.80%2C+2.37%2C+and+2.94+kcal%2Fmol.+A+decreasing+blue+shift+with+increasing+collision+energy+was+found+(~+60%2C+50%2C+and+45+meV%2C+respectively).+Decreasing+blue+shift+with+increasing+E+is+not+typical+and+could+be+due+to+changing+dynamic+factors+as+E+increases.+Since+the+shift+is+significantly+smaller+for+Ne*+%2B+CO2+than+for+Ne*+%2B+C2H2%2C+we+propose+that+the+interaction+between+Ne*+and+CO2+is+less+repulsive+than+that+of+Ne*+and+C2H2+in+the+range+of+geometries+over+which+ionization+occurs.&rft.date=2007-09-19&rft.type=University+of+Pittsburgh+ETD&rft.type=PeerReviewed&rft.format=application%2Fpdf&rft.language=en&rft.identifier=http%3A%2F%2Fd-scholarship-dev.library.pitt.edu%2F6954%2F1%2FTHESIS2007.pdf&rft.identifier=++Noroski%2C+Joseph+Harold++(2007)+PENNING+IONIZATION+OF+SMALL+MOLECULES+BY+METASTABLE+NEON.++Master's+Thesis%2C+University+of+Pittsburgh.++++(Unpublished)++