Charge radii of neon isotopes across the sd neutron shell

Journal Article · Thu Sep 15 00:00:00 EDT 2011 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.84.034313· OSTI ID:21596744

Marinova, K ^[1]; Geithner, W; Kappertz, S; Kloos, S; Kotrotsios, G; Neugart, R; Wilbert, S ^[1]; Kowalska, M; Keim, M ^[2]; Blaum, K ^[3]; Lievens, P ^[4]; Simon, H ^[5]

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1. Institut fuer Physik, Universitaet Mainz, D-55099 Mainz (Germany)
2. Physics Department, CERN, CH-1211 Geneva 23 (Switzerland)
3. Max-Planck-Institut fuer Kernphysik, D-69117 Heidelberg (Germany)
4. Laboratorium voor Vaste-Stoffysica en Magnetisme, K.U.Leuven, B-3001 Leuven (Belgium)
5. Institut fuer Kernphysik, TU Darmstadt, D-64289 Darmstadt (Germany)

We report on the changes in mean square charge radii of unstable neon nuclei relative to the stable {sup 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 {sup 17}Ne up to the neutron-rich {sup 28}Ne in the vicinity of the ''island of inversion.'' Within this range the charge radius is smallest for {sup 24}Ne with N=14 corresponding to the closure of the neutron d{sub 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 {sup 17}Ne, shell closure in {sup 18}Ne, and clustering effects in {sup 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.

• OSTI ID: 21596744
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 84, Issue 3; Other Information: DOI: 10.1103/PhysRevC.84.034313; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
DEFORMATION
DETECTION
IONIZATION
KINETIC ENERGY
LASER SPECTROSCOPY
NEON 17
NEON 18
NEON 20
NEON 21
NEON 24
NEON 28
NEUTRON-DEFICIENT ISOTOPES
NEUTRONS
NITROGEN 14
NITROGEN 20
NUCLEAR HALOS
NUCLEAR RADII
SENSITIVITY
SPECTRAL SHIFT
BARYONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
ELEMENTARY PARTICLES
ENERGY
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
FERMIONS
HADRONS
ISOTOPES
LIGHT NUCLEI
MILLISECONDS LIVING RADIOISOTOPES
MINUTES LIVING RADIOISOTOPES
NEON ISOTOPES
NITROGEN ISOTOPES
NUCLEAR PROPERTIES
NUCLEI
NUCLEONS
ODD-ODD NUCLEI
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
SPECTROSCOPY
STABLE ISOTOPES