Spectroscopy and dynamics of the Rydberg states of C2H2 and their relevance to astrophysical photochemistry.

Details Spectroscopy and dynamics of the Rydberg states of C2H2 and their relevance to astrophysical photochemistry. Spectroscopy and dynamics of the Rydberg states of C2H2 and their relevance to astrophysical photochemistry.

Aug 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997rspta.355.1637s&link_type=abstract

Philos. Trans. R. Soc. Lond. A, Math. Phys. Eng. Sci., Vol. 355, No. 1729, p. 1637 - 1658

Physics

9

Photochemistry: Circumstellar Shells, Acetylene: Circumstellar Shells

Scientific paper

In order to understand the role of the Rydberg states in the photodestruction of acetylene in circumstellar envelopes, the authors have investigated the spectroscopy of some of the ungerade and gerade states by resonant multiphoton ionization in a magnetic bottle photoelectron spectrometer. The ungerade ns+nd Rydberg supercomplexes of C2H2 have been investigated by one-colour (3+1) multiphoton ionization, in the energy region 79500 - 87000 cm-1. The highly excited gerade nf Rydberg states have been observed for the first time, by two-colour (3+1') multiphoton ionization. A value for the adiabatic ionization potential, 91956 cm-1, has been obtained from the observed series limit and from earlier high-resolution infrared data on the ground state of the ion. This value is 4 cm-1 higher than the one measured by ZEKE spectroscopy. The apparent broadening of the observed Rydberg features may originate both from Zeeman 'broadening' of the non-penetrating nf complexes and from predissociation. The np Rydberg states, for which observation is fully allowed in the same spectral region, do not appear in the ionization signal at least in the low-n range, most probably because of their very short lifetime. In the high-energy region, spectral congestion, probably involving p-f mixing, occurs.

Affiliated with

Also associated with

No associations

Rating

Spectroscopy and dynamics of the Rydberg states of C2H2 and their relevance to astrophysical photochemistry. does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Spectroscopy and dynamics of the Rydberg states of C2H2 and their relevance to astrophysical photochemistry., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spectroscopy and dynamics of the Rydberg states of C2H2 and their relevance to astrophysical photochemistry. will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-808202