*

---

Scope: This Data Center critically evaluates, and compiles data on atomic energy levels and spectra, including Landé g-values, calculated eigenvectors, ionization energies, wavelengths, line classifications, transition probabilities, and oscillator strengths. Bibliographic databases maintained by the Data Center also include references for Zeeman effect, Stark effect, hyperfine structure, isotope shift, and spectral line shapes and shifts caused by surrounding media. Responds to user requests for data, literature references, and technical information. Maintains online Atomic Spectroscopy Databases.

Contacts:

Yuri Ralchenko Phone: 301-975-3210 E-mail: yuri.ralchenko@nist.gov

Alexander Kramida Phone: 301-975-8074 E-mail: alexander.kramida@nist.gov

Joseph Reader Phone: 301-975-3222 E-mail: joseph.reader@nist.gov