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Huber, G.; Touchard, F.; Büttgenbach, S.; Thibault, C.; Klapisch, R.; Duong, H. T.; Liberman, S.; Pinard, J.; Vialle, Jean; Juncar, P.; Jacquinot, P.

doi:10.1103/physrevc.18.2342

Cited by 219 publications

(125 citation statements)

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“…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%

“…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%

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Charge radii of neon isotopes across thesdneutron shell

et al. 2011

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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.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Charge radii of neon isotopes across thesdneutron shell

et al. 2011

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“…The calculation and the experiment reveal strong negative correlation, which is better than 95% as revealed from Table I. [29,30,33,34] (where available). Indeed, both the calculations reproduce the experimental values well.…”

Section: Binding Energies and Deformationsmentioning

confidence: 95%

Microscopic investigations of mass and charge changing cross sections

Bhagwat

Gambhir

2004

Phys. Rev. C

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The mass and the charge changing cross sections recently measured in inverse kinematics are investigated microscopically in the framework of Glauber model using the ground state point proton/neutron densities obtained in the relativistic mean field/relativistic Hartree-Bogoliubov approach. As illustrative examples, explicit results for the nuclei spanning different regions of the periodic table, incident on 12 C, hydrogen, and −CH 2 targets are presented. The present study gives an excellent account of the experiment.

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“…Although well established in stable nuclei, these magic numbers begin to disappear for nuclei far from stability. For example, it has been known for over 30 years that the large shell gap at N = 20 diminishes for neutron-rich nuclei [1][2][3][4]. The change in shell structure around N = 20 is now known to be a result of the tensor force, which is strongly attractive for the spin flip pairs πd 5/2 -νd 3/2 and strongly repulsive for the pairs πd 5/2 -ν f 7/2 [5][6][7].…”

mentioning

confidence: 99%

Exploring the Low-ZShore of the Island of Inversion atN=19

Christian¹,

Frank²,

Ash³

et al. 2012

Phys. Rev. Lett.

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The technique of invariant mass spectroscopy has been used to measure, for the first time, the ground state energy of neutron-unbound 28 F, determined to be a resonance in the 27 F + n continuum at 220(50) keV. States in 28 F were populated by the reactions of a 62 MeV/u 29 Ne beam impinging on a 288 mg/cm 2 beryllium target. The measured 28 F ground state energy is in good agreement with USDA/USDB shell model predictions, indicating that p f shell intruder configurations play only a small role in the ground state structure of 28 F and establishing a low-Z boundary of the island of inversion for N = 19 isotones.PACS numbers: 21.10.Dr, 21.10.Pc A hallmark of the nuclear shell model is its reproduction of large energy gaps at nucleon numbers 2, 8, 20, 28, 50, 82, and 126. Although well established in stable nuclei, these magic numbers begin to disappear for nuclei far from stability. For example, it has been known for over 30 years that the large shell gap at N = 20 diminishes for neutron-rich nuclei [1][2][3][4]. The change in shell structure around N = 20 is now known to be a result of the tensor force, which is strongly attractive for the spin flip pairs πd 5/2 -νd 3/2 and strongly repulsive for the pairs πd 5/2 -ν f 7/2 [5][6][7]. For nuclei in the region of N ∼ 20 and Z 13, the reduced N = 20 gap allows p f shell intruder configurations, in the form of multi-particle, multi-hole (npnh or nℏω) cross shell excitations, to compete with standard sd only configurations if the gain in correlation energy is on the same order as the size of the shell gap [8][9][10]. This has led to the establishment of the "island of inversion"-a region of nuclei near N = 20 for which the intruder configuration is dominant in the ground state.

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Spins, magnetic moments, and isotope shifts ofNa21−31by high resolution laser spectroscopy of the atomic
G. Huber¹,
F. Touchard²,
S. Büttgenbach³
et al.

Cited by 219 publications

References 13 publications

Charge radii of neon isotopes across thesdneutron shell

Charge radii of neon isotopes across thesdneutron shell

Microscopic investigations of mass and charge changing cross sections

Exploring the Low-ZShore of the Island of Inversion atN=19

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Spins, magnetic moments, and isotope shifts ofNa21−31by high resolution laser spectroscopy of the atomicG. Huber1, F. Touchard2, S. Büttgenbach3 et al.

Cited by 219 publications

References 13 publications

Charge radii of neon isotopes across thesdneutron shell

Charge radii of neon isotopes across thesdneutron shell

Microscopic investigations of mass and charge changing cross sections

Exploring the Low-ZShore of the Island of Inversion atN=19

Contact Info

Product

Resources

About

Spins, magnetic moments, and isotope shifts ofNa21−31by high resolution laser spectroscopy of the atomic
G. Huber¹,
F. Touchard²,
S. Büttgenbach³
et al.