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(2+1’) rotationally resolved resonance enhanced multiphoton ionization via the E ^2∑^+(4s,3d) and H ^2∑^+(3d,4s) Rydberg states of NO

Rudolph, H. and McKoy, V. (1990) (2+1’) rotationally resolved resonance enhanced multiphoton ionization via the E ^2∑^+(4s,3d) and H ^2∑^+(3d,4s) Rydberg states of NO. Journal of Chemical Physics, 93 (10). pp. 7054-7065. ISSN 0021-9606. https://resolver.caltech.edu/CaltechAUTHORS:20151028-114732155

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Abstract

The results of studies of ionic rotational branching ratios and photoelectron angular distributions resulting from (2+1’) resonance enhanced multiphoton ionization of NO via various high J (≊21.5) rotational branches of the E ^2∑^+(4s,3d) and H ^2∑^+(3d,4s) Rydberg states are presented. The rotational branching ratios show the expected ΔN=even rotational propensity rule with very small ΔN=odd signals. The branching ratios for the E ^2∑^+ state are seen to be independent of photoelectron energy with the ΔN=+2 signals strongest and no appreciable higher rotational transfer peaks (‖ΔN‖≥3). The higher rotational transfer signal for ionization of the H ^2∑^+ state are also negligible but the rotational branching ratios are strongly energy dependent due to a Cooper minimum in the l=3 partial wave of the kσ‐ and kπ‐continua at a photoelectron kinetic energy of 2.6 eV and 2.9 eV, respectively. This leads to a strong rotational selectivity that can be exploited to produce ions in a specific rotational level. These consequences of Cooper minima close to threshold are quite general and their influence on rotational distributions should be readily observable in other molecular systems. The photoelectron angular distributions via both states show a strong energy dependence with a rapid change in the angular distributions around the Cooper minimum associated with the H ^2∑^+ state.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1063/1.459428DOIArticle
http://scitation.aip.org/content/aip/journal/jcp/93/10/10.1063/1.459428PublisherArticle
Alternate Title:(2+1’) rotationally resolved resonance enhanced multiphoton ionization via the E 2∑+(4s,3d) and H 2∑+(3d,4s) Rydberg states of NO
Additional Information:© 1990 American Institute of Physics. (Received 4 May 1990; accepted 23 July 1990) The research was supported by the National Science Foundation (Grant No. CHE-8521391), the Air Force Office of Scientific Research (Contract No. 87-0039), and the Office of Health and Environmental Research of the U.S. Department of Energy (Grant No. DE-FG03-87ER60513). We also made use of resources of the San Diego SuperComputer Center, which is supported by the National Science Foundation. H. R. gratefully acknowledges support from the NATO Science Fellowship Program (Denmark). We would also like to acknowledge helpful discussions with Dr. Richard Zare, Mr. David Leahy, and Dr. James P. Reilly during the preparation of this work.
Funders:
Funding AgencyGrant Number
NSFCHE-8521391
Air Force Office of Scientific Research (AFOSR)87-0039
Department of Energy (DOE)DE-FG03-87ER60513
NATO Postdoctoral FellowshipUNSPECIFIED
Issue or Number:10
Record Number:CaltechAUTHORS:20151028-114732155
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20151028-114732155
Official Citation:(2+1’) rotationally resolved resonance enhanced multiphoton ionization via the E  2∑+(4s,3d) and H  2∑+(3d,4s) Rydberg states of NO Rudolph, H. and McKoy, V., The Journal of Chemical Physics, 93, 7054-7065 (1990), DOI:http://dx.doi.org/10.1063/1.459428
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:61647
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:09 Nov 2015 23:47
Last Modified:03 Oct 2019 09:10

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