Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004apj...615l.177g&link_type=abstract
The Astrophysical Journal, Volume 615, Issue 2, pp. L177-L180.
Astronomy and Astrophysics
Astronomy
15
Ism: Clouds, Methods: Laboratory, Molecular Processes, Radiation Mechanisms: Nonthermal, Ultraviolet: Ism, Ultraviolet: Solar System
Scientific paper
In studying various interstellar and solar system ice analogs, we have recently found that upon vacuum ultraviolet photolysis, polycyclic aromatic hydrocarbons (PAHs) frozen in water ice at low temperatures are easily ionized and indefinitely stabilized as trapped ions (Gudipati; Gudipati & Allamandola). Here we report the first experimental study that shows that PAH ionization energy is significantly lowered in PAH/H2O ices, in agreement with recent theoretical work (Woon & Park). The ionization energy (IE) of the PAH studied here, quaterrylene (C40H20, IE=6.11 eV), is lowered by up to 2.11 eV in water ice. PAH ionization energy reduction in low-temperature water ice substantially expands the astronomical regions in which trapped ions and electrons may be important. This reduction in ionization energy should also hold for other types of trapped species in water-rich interstellar, circumstellar, and solar system ices.
Allamandola Louis J.
Gudipati Murthy S.
No associations
LandOfFree
Polycyclic Aromatic Hydrocarbon Ionization Energy Lowering in Water Ices 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 Polycyclic Aromatic Hydrocarbon Ionization Energy Lowering in Water Ices, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polycyclic Aromatic Hydrocarbon Ionization Energy Lowering in Water Ices will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1009399