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K Codling

Publications and source records attributed to K Codling.

5 recordsLinked to original sources
PubMed2001

Counterintuitive alignment of H2(+) in intense femtosecond laser fields.

The multiphoton ionization of H2 has been studied using laser pulses of 266 nm wavelength, 250 fs duration, and 5x10(13) W/cm(2) peak intensity. Dissociation of H2(+) via one-photon absorption proceeds through two channels with markedly different proton angular distributions. The lower-energy channel (2.6 eV kinetic energy release) is produced in the bond softening mechanism, which generates parallel alignment. The higher-energy channel (3.5 eV) originates from population trapping in a light-induced bound state, where bond hardening generates orthogonal, counterintuitive alignment.

Journal Article↗
PubMed1997

Atomic and molecular physics using synchrotron radiation - the early years.

The field of atomic and molecular photoionization has undoubtedly been transformed by the use of synchrotron radiation. In the mid-1960's the 180 MeV electron synchrotron at the National Bureau of Standards, Washington, DC, was used to discover many resonances in the photoionization continua of atoms and simple molecules. The resonances were characterized in terms of the excited states involved, their energies and lifetimes. This article concentrates on that period. As dedicated high-flux storage rings became available, the emphasis turned to the study of the products of the photoionization process in order to further understand the electron correlation effects that had been uncovered earlier; examples of these more sophisticated experiments are given.

Journal Article↗