Hyperfine Spectrum of NaCl by Molecular-Beam Electric Resonance

15 April 1969

journal article
research article
Published by AIP Publishing in The Journal of Chemical Physics

Vol. 50 (8) , 3547-3552
https://doi.org/10.1063/1.1671582

Abstract

The hyperfine spectrum of NaCl has been observed at very low field using the molecular‐beam electric resonance method. The Hamiltonian is expressed in a representation in which the combined quadrupole term is diagonal when the quadrupole interaction constants of the two nuclei are equal. The analysis of the spectrum then gives for the constants

X^{+} {≡ [(eqQ)}_{Na} {+ (eqQ)}_{Cl} {] / 2, X}^{-} {≡ [(eqQ)}_{Na} {− (eqQ)}_{Cl} {] / 2, c}^{+} {≡  (c}_{1} {+ c}_{2} {) / 2, c}_{3}, and c_{4}

the values (in kilohertz) for ²³Na³⁵Cl:

X^{+} {= − 5658.0 ± 0.1, X}^{-} {= − 16 ± 50, c}^{+} {= + 0.51 ± 0.01, c}_{3} = + 0.22 ± 0.02

, and

c_{4} = + 0.05 ± 0.03

for

{v = 0; X}^{+} = − 5716.3 ± 0.5

and

X^{-} = + 116 ± 20

for

{v = 1; X}^{+} = − 5772.6 ± 0.7

and

X^{-} = + 235 ± 12

for

v = 2; and X^{+} = − 5828 ± 1

and

X^{-} = + 340 ± 15

for

v = 3

. Lines have also been observed corresponding to ²³Na³⁵Cl,

J = 2

, and ²³Na³⁷Cl,

J = 1

Keywords

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