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POSTDOCTORAL POSITION AT ARGONNE NATIONAL LABORATORY The Gas-Phase Chemical Dynamics Program at Argonne National Laboratory has a postdoctoral position open to work with Dr. Stephen Pratt. The appointee will be involved in experimental laser-based studies of the photoionization and photodissociation dynamics of small polyatomic molecules in the gas phase. The research program is aimed at characterizing and elucidating the ionization and dissociation dynamics of highly excited states of molecules. There is a particular interest in understanding how the ionization and dissociation branching ratios, product state distributions, angular distributions, etc. depend on the quantum numbers of the prepared states. Recent work on ammonia is discussed in Phys. Rev. Lett. 84 (2000) 5078 and J. Chem. Phys. 113 (2000) 7188. Future work will involve a variety of complementary experimental techniques, including time-of-flight mass spectrometry, conventional and threshold/ZEKE photoelectron spectroscopy, and laser-induced fluorescence. In general, double- or multi-resonance techniques will be used to excite the molecules of interest, although single-photon vacuum ultraviolet techniques will be employed as appropriate. A new project to use photoion and photoelectron imaging to elucidate the decay of highly excited states is also currently underway. The applicant should be a recent (or soon-to-be) Ph.D. in Chemistry, Physics, or a related field, and have experience in experimental chemical, atomic, or molecular physics. Please send a curriculum vitae and the names of three references to Stephen Pratt, Building 200, Argonne National Laboratory, Argonne, IL 60439 or e-mail to [log in to unmask] Argonne National Laboratory is an equal opportunity/affirmative action employer.