Nuclear charge radii and nuclear moments of neutron deficient Ba isotopes from high resolution laser spectroscopy

Abstract

tate über o<r >, das beobachtete "odd-even staggering" und die Kernmomente werden im Lichte anderer Ergebnisse über die Kernstruktur im Bereich 50 < (N,Z) < 82 diskutiert.-1 -

Collinear fast beam-laser spectroscopy on 5d 2 D 3/2, 5/2 barium ions

“…They are found to be in agreement with those obtained in an atomic beam-laser experiment on the resonance line of BaI [5].…”

Isotope shifts of perturbed 6sns 1 S 0 and3 S 1 Rydberg states of odd barium isotopes

“…of the intermediate state. From the known hyperfine structure of the intermediate state [20] this difference can be deduced from the measured shifts (~2137(/~],/7/) -O~38)/2n, using a relation similar to (9). The outlined procedure was followed for the 6sns tS o series.…”

Doppler-free two-photon laser spectroscopy of barium I: Hyperfine splitting and isotope shift of high lying levels

“…Change of total electron density at the nucleus for twophoton transitions i. Values are normalized to the electron density change in the 6s 2 ~So~6S 6p ~P~ one-photon transition j, whose data have been taken from [5] …”

“…On the other hand from the hyperfine structure of the levels information on electromagnetic moments and spins of the atomic nuclei can be deduced. Natural barium essentially consists of 5 stable isotopes, but more than 20 isotopes have lifetimes longer than i s. Investigations of the hyperfine structure have been done on Ba I [3][4][5][6] as well as on Ba II [7][8][9][10]. The stable isotope with largest mass, 138Ba, has magic neutron number 82 which results in a comparatively small nuclear size.…”

“…The stable isotope with largest mass, 138Ba, has magic neutron number 82 which results in a comparatively small nuclear size. The nuclear charge radii for a large number of stable and unstable isotopes have also been the subject of recent isotope shift investigations [5]. In contrast to the Ba fine structure, the understanding of the hyperfine structure is not yet satisfactory [11].…”