New spectroscopic tool for cluster science: Nonexponential laser fluence dependence of photofragmentation

Journal Article · Thu Feb 01 00:00:00 EST 1996 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.76.1445· OSTI ID:284547

Haberland, H; Issendorff, B v ^[1]

---

1. Fakultaet fuer Physik, Universitaet Freiburg, H. Herderstrasse 3, D-79104 Freiburg (Germany)

The photodestruction of Hg{sub 7}{sup ++} and Hg{sub 9}{sup ++} has been measured as a function of photon flux. A polarization dependent deviation from a purely exponential intensity decrease was observed in both cases. This effect, which in essence is an alignment phenomenon, can be used to characterize dissociating electronic transitions of molecules and clusters. For the clusters studied it is due to a one-dimensional transition dipole moment having a fixed direction within the cluster. The effect is expected to play a role in many photoabsorption experiments where molecule/cluster ionization or fragmentation is studied under high photon fluxes. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 284547
• Journal Information: Physical Review Letters, Vol. 76, Issue 9; Other Information: PBD: Feb 1996
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
MERCURY
ATOMIC CLUSTERS
ABSORPTION SPECTRA
PHOTONS
SPECTROSCOPY
ABSORPTION
DIPOLES
IONIZATION
FRAGMENTATION
CROSS SECTIONS
POLARIZATION