Ion trap measurement of U64+ X-ray transition spectra

doi:10.1016/0168-583X(91)96012-A

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms

Volumes 56–57, Part 1, 1 May 1991, Pages 227-231

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Abstract

Highly-charged uranium ions with a dominant nickel-like component (U⁶⁴⁺) were produced using the electron beam ion trap (EBIT) with an electron bombardment energy of 7.4 keV. A comparison of the measured n = 4 to n = 3 X-ray transition spectra with calculations for U⁶⁴⁺ gave excellent qualitative agreement. The low-energy region of the 4-3 spectrum for the Ni-like ions was characterized by a strong electric quadrupole 4s-3d transition, about as large as the leading dipole 4f-3d transition, which tagged the abundance of U⁶⁴⁺ ions. High resolution spectroscopy was used to measure 4f-3d transition energies for ten charge states: U⁶⁰⁺-⁶⁹⁺ excited by 6.4–8.9 keV electrons. The ionization balance for 8.9 keV electron excitation was mostly from five charge states, U⁶⁴⁺-U⁶⁸⁺ qualitative agreement with a separate analysis of extracted ions.

References (16)

M. Klapisch et al.
Phys. Lett.
(1980)
C. Bauche-Arnoult et al.
Nucl. Instr. and Meth.
(1988)
J.H. Scofield
Phys. Rev.
(1974)
R.E. Marrs et al.
Phys. Rev. Lett.
(1988)
P. Beiersdorfer et al.
Phys. Rev.
(1990)
P. Beiersdorfer et al.
Phys. Rev. Lett.
(1990)
D.A. Knapp et al.
Phys. Rev. Lett.
(1989)
J.R. Henderson et al.
Phys. Rev. Lett.
(1990)

There are more references available in the full text version of this article.

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Ion trap measurement of U64+ X-ray transition spectra

Abstract

Phys. Lett.

Nucl. Instr. and Meth.

Phys. Rev.

Phys. Rev. Lett.

Phys. Rev.

Phys. Rev. Lett.

Phys. Rev. Lett.

Phys. Rev. Lett.

Ion trap measurement of U⁶⁴⁺ X-ray transition spectra