Charge-exchange x-ray spectra: Evidence for significant contributions from radiative decays of doubly excited states
Abstract
Charge-exchange collisions of slow Ne10+ ions with He, Ne, and Ar targets were studied with simultaneous x-ray and cold-target recoil-ion-momentum spectroscopy proving the contribution of several mechanisms to the radiative stabilization of apparent (4,4) doubly excited states for He and Ne targets and of (5,6) states for Ar. In particular, the stabilization efficiency of the mechanism of dynamic auto-transfer to Rydberg states is confirmed. Moreover, we present evidence for direct radiative decays of (4,4) states populated in collisions with He, which is an experimental indication of the population of so-called unnatural-parity states in such collisions. Lastly, these mechanisms lead to the emission of x-rays that have considerably higher energies than those predicted by current spectral models and may explain recent observations of anomalously large x-ray emission from Rydberg levels.
- Authors:
-
- Univ. of Jordan, Amman (Jordan). Dept. of Physics
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Gulf Coast State College, Panama City, FL (United States). Natural Sciences Division
- Univ. of Nevada, Reno, NV (United States). Dept. of Physics
- Publication Date:
- Research Org.:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE; National Aeronautics and Space Administration (NASA)
- OSTI Identifier:
- 1400100
- Alternate Identifier(s):
- OSTI ID: 1235608
- Report Number(s):
- LLNL-JRNL-664892
Journal ID: ISSN 2469-9926; PLRAAN; TRN: US1703226
- Grant/Contract Number:
- AC52-07NA27344
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review A
- Additional Journal Information:
- Journal Volume: 93; Journal Issue: 1; Journal ID: ISSN 2469-9926
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 74 ATOMIC AND MOLECULAR PHYSICS; 79 ASTRONOMY AND ASTROPHYSICS
Citation Formats
Ali, R., Beiersdorfer, P., Harris, C. L., and Neill, P. A. Charge-exchange x-ray spectra: Evidence for significant contributions from radiative decays of doubly excited states. United States: N. p., 2016.
Web. doi:10.1103/PhysRevA.93.012711.
Ali, R., Beiersdorfer, P., Harris, C. L., & Neill, P. A. Charge-exchange x-ray spectra: Evidence for significant contributions from radiative decays of doubly excited states. United States. https://doi.org/10.1103/PhysRevA.93.012711
Ali, R., Beiersdorfer, P., Harris, C. L., and Neill, P. A. Thu .
"Charge-exchange x-ray spectra: Evidence for significant contributions from radiative decays of doubly excited states". United States. https://doi.org/10.1103/PhysRevA.93.012711. https://www.osti.gov/servlets/purl/1400100.
@article{osti_1400100,
title = {Charge-exchange x-ray spectra: Evidence for significant contributions from radiative decays of doubly excited states},
author = {Ali, R. and Beiersdorfer, P. and Harris, C. L. and Neill, P. A.},
abstractNote = {Charge-exchange collisions of slow Ne10+ ions with He, Ne, and Ar targets were studied with simultaneous x-ray and cold-target recoil-ion-momentum spectroscopy proving the contribution of several mechanisms to the radiative stabilization of apparent (4,4) doubly excited states for He and Ne targets and of (5,6) states for Ar. In particular, the stabilization efficiency of the mechanism of dynamic auto-transfer to Rydberg states is confirmed. Moreover, we present evidence for direct radiative decays of (4,4) states populated in collisions with He, which is an experimental indication of the population of so-called unnatural-parity states in such collisions. Lastly, these mechanisms lead to the emission of x-rays that have considerably higher energies than those predicted by current spectral models and may explain recent observations of anomalously large x-ray emission from Rydberg levels.},
doi = {10.1103/PhysRevA.93.012711},
journal = {Physical Review A},
number = 1,
volume = 93,
place = {United States},
year = {Thu Jan 21 00:00:00 EST 2016},
month = {Thu Jan 21 00:00:00 EST 2016}
}
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Works referencing / citing this record:
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