Measurement of Anomalously Strong Emission from the $1s\mathrm{\text{\ensuremath{-}}}9p$ Transition in the Spectrum of H-Like Phosphorus Following Charge Exchange with Molecular Hydrogen

Measurement of Anomalously Strong Emission from the $1 s − 9 p$ Transition in the Spectrum of H-Like Phosphorus Following Charge Exchange with Molecular Hydrogen

M. A. Leutenegger, P. Beiersdorfer, G. V. Brown, R. L. Kelley, C. A. Kilbourne, and F. S. Porter

Phys. Rev. Lett. 105, 063201 – Published 5 August 2010

Abstract

We have measured $K$ -shell x-ray spectra of highly ionized argon and phosphorus following charge exchange with molecular hydrogen at low collision energy in an electron beam ion trap using an x-ray calorimeter array with $\sim 6 eV$ resolution. We find that the emission at the high end of the Lyman series is greater by a factor of 2 for phosphorus than for argon, even though the measurement was performed concurrently and the atomic numbers are similar. This does not agree with current theoretical models and deviates from the trend observed in previous measurements.

Received 19 January 2010

DOI:https://doi.org/10.1103/PhysRevLett.105.063201

Authors & Affiliations

M. A. Leutenegger¹, P. Beiersdorfer^2,3, G. V. Brown², R. L. Kelley¹, C. A. Kilbourne¹, and F. S. Porter¹

¹NASA Goddard Space Flight Center, Greenbelt, Maryland 20771, USA
²Lawrence Livermore National Laboratory, Livermore, California 94550, USA
³Space Sciences Laboratory, University of California, Berkeley, California 96720, USA

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Vol. 105, Iss. 6 — 6 August 2010

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Physical Review Letters

Measurement of Anomalously Strong Emission from the 1s−9p Transition in the Spectrum of H-Like Phosphorus Following Charge Exchange with Molecular Hydrogen

M. A. Leutenegger, P. Beiersdorfer, G. V. Brown, R. L. Kelley, C. A. Kilbourne, and F. S. Porter

Phys. Rev. Lett. 105, 063201 – Published 5 August 2010

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Measurement of Anomalously Strong Emission from the $1 s − 9 p$ Transition in the Spectrum of H-Like Phosphorus Following Charge Exchange with Molecular Hydrogen