Aerosol nucleation induced by a high energy particle beam

Details Aerosol nucleation induced by a high energy particle beam Aerosol nucleation induced by a high energy particle beam

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011georl..3809805e&link_type=abstract

Geophysical Research Letters, Volume 38, Issue 9, CiteID L09805

Physics

3

Atmospheric Composition And Structure: Aerosols And Particles (0345, 4801, 4906), Atmospheric Composition And Structure: Ion Chemistry Of The Atmosphere (2419, 2427)

Scientific paper

We have studied sulfuric acid aerosol nucleation in an atmospheric pressure reaction chamber using a 580 MeV electron beam to ionize the volume of the reaction chamber. We find a clear contribution from ion-induced nucleation and consider this to be the first unambiguous observation of the ion-effect on aerosol nucleation using a particle beam under conditions that resemble the Earth's atmosphere. By comparison with ionization using a gamma source we further show that the nature of the ionizing particles is not important for the ion-induced component of the nucleation. This implies that inexpensive ionization sources - as opposed to expensive accelerator beams - can be used for investigations of ion-induced nucleation.

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