Electric quadrupole moments and isotope shifts of radioactive sodium isotopes

Touchard, F.; Serre, Josiane; Buettgenbach, Stephanus; Guimbal, P.; Klapisch, R.; Saint, M. Simon de; Thibault, C.; Duong, H. T.; Juncar, P.; Liberman, S.; Pinard, J.; Vialle, Jean

doi:10.1103/physrevc.25.2756

Cited by 68 publications

(37 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Toward the upper end of the sd shell the radii increase again, probably indicating the influence of deformation, which is related to the occupation of intruder states from the f 7/2 shell in the N = 20 region. The behavior is similar to that observed in the neighboring element sodium (see [6]) where Campi et al [32] showed by deformed Hartree-Fock calculations that the particular features of binding energies and radii in this region can be understood in terms of deformation effects. For this reason, we will consider how deformation shows up along the neon isotopes in the sd shell.…”

Section: Discussionsupporting

confidence: 61%

“…5) shows the characteristic features of a magic shell closure. A similar behavior is observed in the sodium radii [6]. This neutron number corresponds to a completed d 5/2 subshell, suggesting an increased N = 14 gap between d 5/2 and s 1/2 .…”

Section: Shell Structure In the Neon Isotope Chainsupporting

confidence: 48%

“…Spins and nuclear moments of 17 Ne, 23 Ne, and 25 Ne, obtained from the analysis of hyperfine structure for the odd-A isotopes, were published separately [8]. Known radii of the stable isotopes 20−22 Ne [30] were used to isolate the small nuclear volume (field) shifts from the isotope shifts dominated by mass shifts, which remained a major problem in the analysis of the early laser spectroscopy data on sodium [6,7]. Moreover, this procedure eliminates systematic errors of the evaluated radii arising from the large Doppler shifts [12].…”

Section: Discussionmentioning

confidence: 99%

“…This is well inside the working range used for collinear laser spectroscopy on the different isotopes. The Doppler-shifted transition frequency at this beam energy according to (6) becomes ν L = 16773.4128 cm −1 , corresponding to the easily accessible dye laser wavelength of λ = 596.2 nm.…”

Section: Neon Levels Used In the Experimentsmentioning

confidence: 99%

“…Until now sodium was the only element for which isotope shift measurements cover the neutron sd shell between the N = 8 and 20 shell closures. However, the presence of only one stable isotope in this chain set a serious constraint on the accuracy of the radii differences extracted from isotope shifts [6,7]. On the other hand, neon, with three stable isotopes, is the first element for which accurate radii can be obtained from the proton drip line at N = 7 ( 17 Ne) over most of the sd shell, up to N = 18 ( 28 Ne).…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Charge radii of neon isotopes across thesdneutron shell

et al. 2011

View full text Add to dashboard Cite

We report on the changes in mean square charge radii of unstable neon nuclei relative to the stable 20 Ne, based on the measurement of optical isotope shifts. The studies were carried out using collinear laser spectroscopy on a fast beam of neutral neon atoms. High sensitivity on short-lived isotopes was achieved thanks to nonoptical detection based on optical pumping and state-selective collisional ionization, which was complemented by an accurate determination of the beam kinetic energy. The new results provide information on the structural changes in the sequence of neon isotopes all across the neutron sd shell, ranging from the proton drip line nucleus and halo candidate 17 Ne up to the neutron-rich 28 Ne in the vicinity of the "island of inversion." Within this range the charge radius is smallest for 24 Ne with N = 14 corresponding to the closure of the neutron d 5/2 shell, while it increases toward both neutron shell closures, N = 8 and N = 20. The general trend of the charge radii correlates well with the deformation effects which are known to be large for several neon isotopes. In the neutron-deficient isotopes, structural changes arise from the onset of proton-halo formation for 17 Ne, shell closure in 18 Ne, and clustering effects in 20,21 Ne. On the neutron-rich side the transition to the island of inversion plays an important role, with the radii in the upper part of the sd shell confirming the weakening of the N = 20 magic number. The results add new information to the radii systematics of light nuclei where data are scarce because of the small contribution of nuclear-size effects to the isotope shifts which are dominated by the finite-mass effect.

show abstract

Section: Discussionsupporting

confidence: 61%

Section: Shell Structure In the Neon Isotope Chainsupporting

confidence: 48%