Experimental Verification of Theoretical Configuration Mixing in the Energy Levels of Er II Spectra via Isotope Shift Measurements Using a FTS
American Journal of Astronomy and Astrophysics
Volume 5, Issue 2, March 2017, Pages: 10-20
Received: Feb. 8, 2017;
Accepted: Feb. 22, 2017;
Published: Mar. 9, 2017
Views 1599 Downloads 77
Balkrishna Keraba Ankush, Atomic and Molecular Physics Division, Bhabha Atomic Research Centre, Trombay, Mumbai, India
Mukul Narayan Deo, High Pressure and Synchrotron Radiation Physics Division, Bhabha Atomic Research Centre, Trombay, Mumbai, India
Balkrishna Keraba Ankush,
Mukul Narayan Deo,
Experimental Verification of Theoretical Configuration Mixing in the Energy Levels of Er II Spectra via Isotope Shift Measurements Using a FTS, American Journal of Astronomy and Astrophysics.
Vol. 5, No. 2,
2017, pp. 10-20.
Copyright © 2017 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/
) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
W. C. Martin, R. Zalubas, and L. Hagan, “Atomic Energy Levels: The Rare Earth Elements,” NSRDS- NBS 60 Washington: National Bureau of Standards, 1978.
T. A. M. van Kleef and J. J. A. Koot, Unpublished material, 1975.
J. Sugar and J. Reader, “Ionization energies of the singly ionized rare earths”, J. Opt. Soc. Am., Vol. 55, pp. 1286, 1965.
S. M. Bentzen, U. Nielsen, O. Poulsen, “Lifetime measurements in singly ionized erbium using fast-beam laser-modulation spectroscopy” J. Opt. Soc. Am. vol. 72, pp. 1210, 1982.
J. E. Lawler, C. Sneden, J. J. Cowan, J-F Wyart, I. I. Ivans, J. S. Sobeck, M. H. Stockett, E. A. D. Hartog, “Improved laboratory transition probabilities for Er II and application to the erbium abundances of the sun and five r- process-rich, metal-poor stars”, Astrophys. J., Supp. Ser., vol. 178 pp. 71, 2008.
J-F. Wyart and J. E. Lawler, “Theoretical interpretation and new energy levels in Er II”, Phys. Scr., vol. 79, pp. 045301, 2009.
U. Nielsen, K. T. Cheng, H. Ludvigsen, J. N. Xiao, “Hyperfine structure of 4f126s and 4f125d configurations in 167Er II measured by collinear fast-beam laser and radio-frequency laser double-resonance spectroscopy”, Phys. Scr. vol. 34, pp. 776, 1986.
L. Wilets and L. C. Bradley, “Isotope shifts in Erbium” Phys. Rev. vol. 87, pp. 1018, 1952.
W. F. Meggers, C. H. Corliss, and B. F. Scribner, “Tables of spectral line intensities”, vol.145 NBS, Washington, 1975.
N. Spector and S. Held, “The first spectrum of erbium- description and classification” Report No: IA – 13554-T: Israel Atomic Energy Commission, 1980.
J. Čajko, and R. Textoris, “Determination of the intrinsic quadrupole moment of Er162 from a photoelectric measurement of the isotope shifts of the Er I and Er II lines”, Czech J. Phys. B. vol. 17. pp. 917, 1967.
J. Pacheva, “Summaries of the second EGAS- Conference” Hannover, 70 ISV, Fiz. Inst. Bulgar. Acad. Nauk, vol. 21 pp. 41, 1970.
H. D. Kronfeldt and G. Sinn, “Crossed-second-order effects of the isotope shift in the Er II ground configuration 4f126s”, Z. Phys. D, 14 pp. 205, 1989.
B. K. Ankush and M. N. Deo, “Isotope shift measurements in the 660 spectral lines of Er I covering the 340-605 nm wavelength region with a Fourier Transform Spectrometer”, JQSRT, vol. 155 pp. 96. 2015.
W. H. King, “Isotope shifts in Atomic Spectra”, New York Plenum Press, 1984.
M. Wilson, “Ab initio calculation of core relaxation and screening effects on |ѱ(0)|2 for Sm and Eu”, J. Phys. B, vol. 52, pp. 18, 1972.