Double Core Hole Creation and Subsequent Auger Decay in NH3 and CH4 Molecules

J. H. D. Eland, M. Tashiro, P. Linusson, M. Ehara, K. Ueda, and R. Feifel
Phys. Rev. Lett. 105, 213005 – Published 19 November 2010


Energies of the hollow molecules CH42+ and NH32+ with double vacancies in the 1s shells have been measured using an efficient coincidence technique combined with synchrotron radiation. The energies of these states have been determined accurately by high level electronic structure calculations and can be well understood on the basis of a simple theoretical model. Their major decay pathway, successive Auger emissions, leads first to a new form of triply charged ion with a core hole and two valence vacancies; experimental evidence for such a state is presented with its theoretical interpretation. Preedge 2-hole-1-particle (2h1p) states at energies below the double core-hole states are located in the same experiments and their decay pathways are also identified.

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  • Received 14 July 2010


© 2010 The American Physical Society

Authors & Affiliations

J. H. D. Eland1,2, M. Tashiro3, P. Linusson4, M. Ehara3, K. Ueda5, and R. Feifel2

  • 1Department of Chemistry, Physical and Theoretical Chemistry Laboratory, Oxford University, South Parks Road, Oxford OX1 3QZ, United Kingdom
  • 2Department of Physics and Astronomy, Uppsala University, Box 516, SE-751 20 Uppsala, Sweden
  • 3Institute for Molecular Science, Okazaki 444-8585, Japan
  • 4Department of Physics, Stockholm University, AlbaNova University Centre, SE-106 91 Stockholm, Sweden
  • 5Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan

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Vol. 105, Iss. 21 — 19 November 2010

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