Measuring the wavelengths of the Ni-like 4d <sup>1</sup>S<sub>0</sub> (arrow) 4p <sup>1</sup>P<sub>1</sub> and 4f <sup>1</sup>P<sub>1</sub> (arrow) 4d <sup>1</sup>P<sub>1</sub> x-ray laser lin

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In this work we present measurements of the wavelengths of the nickel-like 3d9 4d IS0 + 3d94p � P, X-ray laser line in several low-Z nickel-like ions ranging from yttrium (Z=39) to cadmium (Z=45). With the help of these laser results, we identify this line to very high accuracy in nonlasing plasmas from gallium (Z=3 1) to molybdenum (Z=42). The measured wavelengths are compared with optimized level calculations using the multi-configuration Dirac-Fock code of Grant et al. As an example, for yttrium, we calculate a wavelength of 240.2 A, and measure wavelengths of 240.1 I i 0.30 A in the ... continued below

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Churilov, S; Nilsen, J & Ryobtsev, A September 21, 1998.

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In this work we present measurements of the wavelengths of the nickel-like 3d9 4d IS0 + 3d94p � P, X-ray laser line in several low-Z nickel-like ions ranging from yttrium (Z=39) to cadmium (Z=45). With the help of these laser results, we identify this line to very high accuracy in nonlasing plasmas from gallium (Z=3 1) to molybdenum (Z=42). The measured wavelengths are compared with optimized level calculations using the multi-configuration Dirac-Fock code of Grant et al. As an example, for yttrium, we calculate a wavelength of 240.2 A, and measure wavelengths of 240.1 I i 0.30 A in the lasing plasma and 240.135 + 0.015 A in the nonlasing plasma. Accurate values of these wavelengths are essential for performing plasma imaging and interferometry experiments with multilayer optics which use the X-ray laser to backlight other plasmas. These results also provide important atomic data which is currently missing about the energy of the Id � S, level in the Ni I sequence and help guide evperimentalists who are looking for lasing in these materials for the first time. We also observe lasing on the nickel-like 3d9 4f � P, + 3d94d � P, X-ray laser line in Zr, Nb, and Iv10 and present measured wavelengths for these ions as well as predicted values for other nearby ions.

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  • 6th International Conference on X-Ray Lasers, Kyoto, Japan, August 31-September 4, 1998

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  • Other: DE00002649
  • Report No.: UCRL-JC-130946
  • Grant Number: W-7405-Eng-48
  • Office of Scientific & Technical Information Report Number: 2649
  • Archival Resource Key: ark:/67531/metadc665191

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  • September 21, 1998

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  • June 29, 2015, 9:42 p.m.

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Churilov, S; Nilsen, J & Ryobtsev, A. Measuring the wavelengths of the Ni-like 4d <sup>1</sup>S<sub>0</sub> (arrow) 4p <sup>1</sup>P<sub>1</sub> and 4f <sup>1</sup>P<sub>1</sub> (arrow) 4d <sup>1</sup>P<sub>1</sub> x-ray laser lin, article, September 21, 1998; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc665191/: accessed October 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.