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Relative Quenching Cross Sections in the Reaction of Hg(63P1) Atoms with Isotopic N2O Molecules

dc.contributor.authorHoffman, Morton Z.en_US
dc.contributor.authorBernstein, Richard B.en_US
dc.date.accessioned2010-05-06T21:16:12Z
dc.date.available2010-05-06T21:16:12Z
dc.date.issued1960-08en_US
dc.identifier.citationHoffman, Morton Z.; Bernstein, Richard B. (1960). "Relative Quenching Cross Sections in the Reaction of Hg(63P1) Atoms with Isotopic N2O Molecules." The Journal of Chemical Physics 33(2): 526-529. <http://hdl.handle.net/2027.42/69865>en_US
dc.identifier.urihttps://hdl.handle.net/2027.42/69865
dc.description.abstractThe N14/N15 and O16/O18 isotope effects in the Hg(63P1)‐photosensitized decomposition of nitrous oxide have been measured. Observed isotopic fractionation factors, S0 (interpreted in terms of ratios of rate constants for quenching by N14N14O16 vs N15N14O16, N14N15O16, and N14N14O18), are related to the ratio of isotopic quenching cross sections by the equation Q/Q*=S0(μ/μ*)☒, where μ and μ* are the collisional reduced masses for Hg and the light and heavy isotopic molecules, respectively. The quenching cross section ratio for N142O16/N142O18 was unity within the experimental uncertainty (±0.1%). The ratios for N14N14O16/N15N14O16 and N14N14O16/N14N15O16 differed from unity by +0.98 and +0.44%, respectively. The order of the quenching cross sections for the isotopic nitrous oxide molecules is thus: N15N14O16<N14N15O16<14N14O18≅N14N14O16. The implications of the present observations are briefly discussed.en_US
dc.format.extent3102 bytes
dc.format.extent300427 bytes
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dc.publisherThe American Institute of Physicsen_US
dc.rights© The American Institute of Physicsen_US
dc.titleRelative Quenching Cross Sections in the Reaction of Hg(63P1) Atoms with Isotopic N2O Moleculesen_US
dc.typeArticleen_US
dc.subject.hlbsecondlevelPhysicsen_US
dc.subject.hlbtoplevelScienceen_US
dc.description.peerreviewedPeer Revieweden_US
dc.contributor.affiliationumDepartment of Chemistry, The University of Michigan, Ann Arbor, Michiganen_US
dc.description.bitstreamurlhttp://deepblue.lib.umich.edu/bitstream/2027.42/69865/2/JCPSA6-33-2-526-1.pdf
dc.identifier.doi10.1063/1.1731178en_US
dc.identifier.sourceThe Journal of Chemical Physicsen_US
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dc.identifier.citedreferenceIn the case of NN15O,NN15O, for example, the 4.3 at. %N15%N15 would be distributed as follows, in terms of all the molecules: N15NO  =  0.4%,N15NO=0.4%, NN15O  =  3.9%,NN15O=3.9%, and NNO  =  95.7%.NNO=95.7%.en_US
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dc.identifier.citedreferenceTypical quantities of H2OH2O obtained were in the range of 6.5–15 mg.6.5–15mg.en_US
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dc.identifier.citedreferenceThe symbols N and N∗ represent N14N14 and N15,N15, respectively, while O and O∗ refer, respectively, to O16O16 and O18.O18.en_US
dc.identifier.citedreferenceThe value of Y for sample A is: Y  =  (0.004)/(0.004+0.039)  =  0.093;Y=(0.004)∕(0.004+0.039)=0.093; for sample B, Y  =  (0.039)/(0.039+0.004)  =  0.907.Y=(0.039)∕(0.039+0.004)=0.907.en_US
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dc.owningcollnamePhysics, Department of


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