Interatomic Coulombic decay cascades in multiply excited neon clusters

K. Nagaya, D. Iablonskyi, N. V. Golubev, K. Matsunami, H. Fukuzawa, K. Motomura, T. Nishiyama, T. Sakai, T. Tachibana, S. Mondal, S. Wada, K. C. Prince, C. Callegari, C. Miron, N. Saito, M. Yabashi, Ph. V. Demekhin, L. S. Cederbaum, A. I. Kuleff, M. Yao and K. Ueda ()
Additional contact information
K. Nagaya: Graduate School of Science, Kyoto University
D. Iablonskyi: Institute of Multidisciplinary Research for Advanced Materials, Tohoku University
N. V. Golubev: Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg
K. Matsunami: Graduate School of Science, Kyoto University
H. Fukuzawa: RIKEN SPring-8 Center
K. Motomura: RIKEN SPring-8 Center
T. Nishiyama: Graduate School of Science, Kyoto University
T. Sakai: Graduate School of Science, Kyoto University
T. Tachibana: Institute of Multidisciplinary Research for Advanced Materials, Tohoku University
S. Mondal: Institute of Multidisciplinary Research for Advanced Materials, Tohoku University
S. Wada: RIKEN SPring-8 Center
K. C. Prince: Elettra-Sincrotrone Trieste
C. Callegari: Elettra-Sincrotrone Trieste
C. Miron: Synchrotron SOLEIL, L’Orme des Merisiers, Saint-Aubin, BP 48
N. Saito: RIKEN SPring-8 Center
M. Yabashi: RIKEN SPring-8 Center
Ph. V. Demekhin: Theoretische Atom- und Molekülphysik, Institut für Physik und CINSaT, Universität Kassel
L. S. Cederbaum: Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg
A. I. Kuleff: Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg
M. Yao: Graduate School of Science, Kyoto University
K. Ueda: RIKEN SPring-8 Center

Nature Communications, 2016, vol. 7, issue 1, 1-6

Abstract: Abstract In high-intensity laser light, matter can be ionized by direct multiphoton absorption even at photon energies below the ionization threshold. However on tuning the laser to the lowest resonant transition, the system becomes multiply excited, and more efficient, indirect ionization pathways become operative. These mechanisms are known as interatomic Coulombic decay (ICD), where one of the species de-excites to its ground state, transferring its energy to ionize another excited species. Here we show that on tuning to a higher resonant transition, a previously unknown type of interatomic Coulombic decay, intra-Rydberg ICD occurs. In it, de-excitation of an atom to a close-lying Rydberg state leads to electron emission from another neighbouring Rydberg atom. Moreover, systems multiply excited to higher Rydberg states will decay by a cascade of such processes, producing even more ions. The intra-Rydberg ICD and cascades are expected to be ubiquitous in weakly-bound systems exposed to high-intensity resonant radiation.

Date: 2016
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DOI: 10.1038/ncomms13477

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