Primary author repository: authors.library.caltech.edu/records/55vz5-ymz44 . DOI doi.org/10.1063/1.454408 . Todd S. Rose, Mark J. Rosker and Ahmed H. Zewail, Journal of Chemical Physics 88(10), 6672–6673, published 15 May 1988. Repository bylines establish Todd S. and Mark J. without expansion of remaining initials. The paper reports wave-packet oscillations in dissociation reactions; the related NaI interpretation is discussed in the existing Zewail Nobel Lecture, The NaI Discovery and Figure 15.