https://doi.org/10.1007/s100530050217
Photoionization of argon, krypton and xenon clusters in the inner valence shell region
1
LURE, Université Paris-Sud, 91405 Orsay, France
2
DIAM, Université Pierre et Marie Curie, 4 place Jussieu, BP 75, 75252 Paris, France
3
Department of Applied Physics, Tokyo University of Agriculture and Technology,
Nakacho 2-24-16, Koganei-shi,
Tokyo 184, Japan
4
Photon Factory, Institute of Materials Structure Science, High Energy Accelerator
Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305, Japan
Corresponding author: a thissen@lure.u-psud.fr
Received:
10
February
1998
Revised:
17
July
1998
Accepted:
31
July
1998
Published online: 15 December 1998
Photoionization of rare gas clusters in the innervalence shell region has been
investigated using threshold photoelectron and photoion spectrometers and
synchrotron radiation. Two classes of states are found to play an
important role: (A)
valence states, correlated to dissociation limits involving an ion with a
hole in its
innervalence ns shell, (B) Rydberg states correlated to dissociation limits involving
an ion with a hole in its outervalence np shell plus an excited neutral atom. In
dimers, class A states are "bright", that is, accessible by photoionization, and serve
as an entrance step to form the class B "dark" states; this character fades as the size
of the cluster increases. In the dimer, the "Mulliken" 
valence state is found
to present a shallow potential well housing a few vibrational levels; it is
predissociated by the class B Rydberg states. During the predissociation a
remarkable energy transfer process is observed from the excited ion that loses its
innershell electron to its neutral partner.
PACS: 36.40.-c – Atomic and molecular clusters / 36.40.Wa – Charged clusters
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 1998
