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

Spectroscopic Data for Neutral Francium (Fr I)

Published

Author(s)

Jean E. Sansonetti

Abstract

Energy levels and hyperfine structure constants have been compiled for the sixteen longest-lived isotopes of francium (Z=87). Wavelengths with classifications and transition probabilities are also tabulated for 212Fr. In addition, the ionization energy is included for isotopes in which a sufficient number of levels have been measured.
Citation
J. Phys. & Chem. Ref. Data (JPCRD) -
NIST Pub Series
J. Phys. & Chem. Ref. Data (JPCRD)
Pub Type
NIST Pubs

Keywords

atomic spectra, energy levels, francium, hyperfine structure, wave numbers, wavelength tables, wavelengths

Citation

Sansonetti, J. (2018), Spectroscopic Data for Neutral Francium (Fr I), J. Phys. & Chem. Ref. Data (JPCRD), National Institute of Standards and Technology, Gaithersburg, MD (Accessed June 9, 2023)

Created November 14, 2018