Abstract

Measurements are reported for the absorption of the 422.7 nm line of a natural-abundance calcium hollow cathode lamp by solutions of ⁴⁰Ca, ⁴⁴Ca, and ⁴⁸Ca at 0.5 to 3.0 ppm levels in 0.06 <i>M</i> HCl (aqueous) when aspirated into air-acetylene and nitrous oxide-acetylene flames. In the case of the air-acetylene flame the relative absorptions per mole of calcium in solution were 1.00, 1.11, and 1.08 for the 40, 44, and 48 isotopes, respectively. With the nitrous oxide-acetylene flame similar experiments gave ratios of 1.00, 1.08, and 1.06 in the same order. These results may be rationalized with a model that considers the simultaneous effects of isotope shifting, Lorentz broadening and shifting, and Doppler broadening of the calcium resonance line in the flame. With the air-acetylene flame, solutions that also contained 5000 ppm of Sr as SrCl₂ gave relative absorbances for the 40, 44, and 48 calcium isotopes of 1.00, 1.04, and 1.10. Flame-atomic-distribution studies lead to the conclusion that in the presence of 5000 ppm of Sr, calcium kinetic isotope effects are also important.

Atomic Absorption Spectroscopy with High Temperature Flames

J. B. Willis
Appl. Opt. 7(7) 1295-1304 (1968)

Nitrous Oxide Supported Flames for Atomic Absorption Spectroscopy

L. R. P. Butler and Anne Fulton
Appl. Opt. 7(10) 2131-2137 (1968)

Resonance ionization spectroscopy of high-lying 4sns and 4snd Rydberg levels of odd calcium isotopes

Yoshihiro Iwata, Masabumi Miyabe, Katsuaki Akaoka, Ikuo Wakaida, and Shuichi Hasegawa
J. Opt. Soc. Am. B 41(1) 119-126 (2024)

Hyperfine Structure and Isotope Shift in the 7 ²S_1/2–6 ²P_1/2 Transition of Natural Thallium by Atomic Beam Absorption*

C. J. Schuler, M. Çiftan, L. C. Bradley, and H. H. Stroke
J. Opt. Soc. Am. 52(5) 501-503 (1962)

The Electrooptic Effect in Calcium Pyroniobate

C. H. Holmes, E. G. Spencer, A. A. Ballman, and P. V. Lenzo
Appl. Opt. 4(5) 551-553 (1965)