U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PUBLICATIONS

Spectrum and Energy Levels of the Nd4+ Free Ion (Nd V)

Published

Author(s)

Ali Meftah, J-F Wyart, Jocelyne Sinzelle, Wan-U Lydia Tchang-Brillet, Norbert Champion, Nissan Spector, J Sugar

Abstract

The spectrum of neodymium excited by a sliding spark source was photographed on two vacuum ultraviolet normal-incidence spectrographs. About 250 lines attributed to Nd V, hitherto unknown, have been identified. The analysis of this spectrum established all the energy levels of the configuration 4f^2, 4f5d, 4f6s and 4f6p (except for 4f^2^1 S_0). Altogether, 48 known levels classify about 160 lines. Their theoretical calculation includes a least-squares fit with an rms error of 28 cm^-1 for the even parity levels of 26 cm^-1 for the odd parity ones, as well as best values for the relevant radial interaction parameters. In particular, interactions with the core-excited configurations 5p^5 4f^3 and 5p^5 4f^2 5d are discussed. Intensities derived from phosphor image plates are used to estimate an effective temperature in the spark of T_eff - 3.6 eV.
Citation
Physica Scripta
Volume
73
Pub Type
Journals

Keywords

emission spectrum, energy levels, fits, free-ion, parametric, triply ionized, wavelengths

Citation

Meftah, A. , Wyart, J. , Sinzelle, J. , Tchang-Brillet, W. , Champion, N. , Spector, N. and Sugar, J. (2021), Spectrum and Energy Levels of the Nd<sup>4+</sup> Free Ion (Nd V), Physica Scripta (Accessed November 8, 2024)

Issues

If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.

Created October 12, 2021