Gold Cluster Electronic Radiative Cooling and Abundances

• The effect on abundances of radiative cooling of gold clusters is analyzed quantitatively for cluster sizes n = 8-20 based on known dissociation energies, radiative time Constants and the monomer unimoledilar decay frequency factor, and an assumed dimer loss frequency factor. Radiative cooling is observed to quench the temporal development of the abundance spectra and, in general, to produce larger size-to-size contrasts than observed in the absence of radiation. Also, the emission of photons with large and small energies was compared quantitatively. For small photon energies, the radiative time constant is not given by the photon emission rate constant. An alternative expression for this regime was found to be very accurate. Strong radiative cooling will have consequences both for the interpretation of mass abundance spectra and potentially also for the production of specific mass selected nanoparticles. The present work supplies the conceptual framework for such applications.

Ämnesord

NATURVETENSKAP  -- Fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences (hsv//eng)

Nyckelord

photodissociation spectroscopy

vibrational spectroscopy

optical-absorption

nanoscale

emission

cations

size

Chemistry

Science & Technology - Other Topics

Materials Science

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