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Stephen
T. Pratt
Group Leader, Chemist,
Chemical Dynamics in the Gas Phase
Argonne National Laboratory
Bldg. 200, Room D177
Chemistry Division
Argonne, IL 60439
Phone: 630-252-4199
Fax: 630-252-9292
E-mail: stpratt@anl.gov
Areas
of Research and Expertise
Chemical Physics; Molecular Photoionization and
Photodissociation; X-Ray Imaging and Spectroscopy
Vacuum ultraviolet and multiphoton studies
of atomic and
molecular photoionization dynamics, photoionization and
photodissociation from excited states, and autoionization
and predissociation phenomena; multichannel quantum defect
theory calculations of molecular photoionization processes.
Decay processes of highly excited states
including unimolecular
reaction dynamics, Rydberg state collisions and reactions,
field-ionization dynamics, ion-molecule reactions, and the
mode dependence of decay processes in larger molecules.
Techniques of X-ray physics including
spectroscopy,
microimaging, and microtomography, and their applications,
particularly in the area understanding processes occurring in
complex, heterogeneous media.
Recent
Publications
Vibrational Autoionization and Predissociation in
High
Rydberg States of Nitric Oxide, S. T. Pratt, J. Chem. Phys.
108 (17), 7131-7140 (1998)
Dynamics of Rydberg States of Nitric
Oxide Probed by
Two-Color Resonant Four-Wave Mixing Spectroscopy,
E. F. McCormack, F. Di Teodoro, J. M. Grochocinski, and
S. T. Pratt, J. Chem. Phys. 109 (1), 63-71 (1998)
Rotationally Resolved Photoelectron Spectroscopy
of
Autoionizing States of Water, W. L. Glab, M. S. Child, and
S. T. Pratt, J. Chem. Phys. 109 (8), 3062-3068 (1998)
X-Ray Imaging and Microspectroscopy of
Plants and Fungi,
W. Yun, S. T. Pratt, R. M. Miller, Z. Cai, D. B. Hunter,
A. G. Jarstfer, K. M. Kemner, B. Lai, H. R. Lee, D. G. Legnini,
W. Rodriques, and C. I. Smith, J. Synchrotron
Rad. 5,
1390-1395 (1998)
Rotational Interactions in Autoionizing
Rydberg States of
Ammonia, C. A. Raptis and S. T. Pratt, Chem.
Phys. Lett.
303, 281-288 (1999)
Photoelectron Spectroscopy of Rydberg
States of the Methyl
Radical, J. A. Bacon and S. T. Pratt, Chem.
Phys. Lett. 311,
346-354 (1999)
Using Zone Plates for X-Ray Microimaging
and Micro-
spectroscopy in Environmental Science, K. M.
Kemner,
W. Yun, Z. Cai, B. Lai, H. R. Lee, D. G. Legnini,
W. Rodriques, J. D. Jastrow, R. M. Miller, S. T. Pratt, and
A. J. M. Smucker, J. Synchrotron Rad. 6. 639-641 (1999)
Double-Resonance Spectroscopy of Autoionizing
States of
Ammonia, C. A. Raptis, J. A. Bacon, and S. T. Pratt, J. Chem.
Phys. 112 (6), 2815-2825 (2000)
Photoelectron Spectroscopy of Autoionizing
Rydberg States
of Ammonia, J. A. Bacon and S. T. Pratt, J.
Chem. Phys. 112
(9), 4153-4161 (2000)
Vibrational Autoionization in Rydberg
States of Ammonia,
C. A. Raptis and S. T. Pratt, Phys. Rev. Lett. 84 (22),
5078-5081 (2000)
Mode-Dependent Vibrational Autoionization
Rates in Aniline,
C. A. Raptis and S. T. Pratt, J. Chem. Phys.
113 (10),
4190-4202 (2000)
Photoelectron Spectroscopy of Ammonia:
Mode-Dependent
Vibrational Autoionization, J. A. Bacon and
S. T. Pratt, J. Chem.
Phys. 113 (17), 7188-7196 (2000)
Competition Between Autoionization and
Predissociation in
Molecular Rydberg States, S. T. Pratt. In Adv.
Ser. in Phys.
Chem., Vol. 10: Photoionization and Photodetachment, edited
by C. Y. Ng, World Scientific, Singapore, 1011-1062 (2000)
Two-Photon Spectroscopy of Autoionizing
States of
Ammonia, C. A. Raptis and S. T. Pratt, J. Chem.
Phys. 115
(6), 2483-2491 (2001)
Photoelectron Spectroscopy via the 1
1Du State of Diacetylene,
C. Ramos, P. R. Winter, T. S. Zwier, and S. T. Pratt, J. Chem.
Phys. 116 (10), 4011-4022 (2002)
Photoionization Dynamics of the B1E"
State of Ammonia,
S. T. Pratt, J. Chem. Phys. 117 (3), 1055-1067 (2002)
Photoionization of Dabco via High Vibrational
Levels of the S1
State, S. T. Pratt, Chem. Phys. Lett. 360, 406-413 (2002)
Velocity Map Imaging of the Photodissociation
of CF3I: Vibrational
Energy Dependence of the Recoil Anisotropy, F. Aguirre and
S. T. Pratt, J. Chem. Phys. 118 (3), 1175-1183 (2003)
Ion-Imaging of the Photodissociation
of CF3I+, F. Aguirre and
S. T. Pratt, J. Chem. Phys. 118 (14), 6318-6326 (2003)
Microtomography of Dinosaur Shells and
Bones, S. T. Pratt,
C. A. Raptis, F. DeCarlo, and D. C. Mancini, Report,
ANL-01/03 (in preparation)
Vibrational Autoionization in Polyatomic
Molecules, S. T. Pratt,
J. A. Bacon, and C. A. Raptis, Book Chapter, Dissociative
Recombination , Kluwer Academic Publishers, Editor,
S. Guberman (in preparation)
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