Nuclear Charge Radii of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi>Mg</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>21</mml:mn><mml:mtext mathvariant="normal">−</mml:mtext><mml:mn>32</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>

Yordanov, Deyan T.; Bissell, M. L.; Blaum, Klaus; Rydt, M. De; Geppert, Ch.; Kowalska, Magdalena; Krämer, Jörg; Kreim, Kim Dieter; Krieger, A.; Lievens, Peter; Neff, Thomas; Neugart, R.; Neyens, G.; Nörtershäuser, W.; Sánchez, R.; Vingerhoets, Pieter

doi:10.1103/physrevlett.108.042504

Cited by 78 publications

(87 citation statements)

References 36 publications

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“…The 33 Mg ground state could again be shown to have a nearly pure 2p-2h intruder nature, contrary to the earlier suggested 1p-1h configuration and in agreement with the structure of other isotopes in the 'island'.…”

Section: New Methods and Highlights Since 2000supporting

confidence: 64%

Collinear laser spectroscopy at ISOLDE: new methods and highlights

Neugart

Billowes

Bissell

et al. 2017

J. Phys. G: Nucl. Part. Phys.

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Over three and a half decades of collinear laser spectroscopy and the COL-LAPS setup have played a major role in the ISOLDE physics programme. Based on a general experimental principle and diverse approaches towards higher sensitivity, it has provided unique access to basic nuclear properties such as spins, magnetic moments and electric quadrupole moments as well as isotopic variations of nuclear mean square charge radii. While previous methods of outstanding sensitivity were restricted to selected chemical elements with special atomic properties or nuclear decay modes, recent developments have yielded a breakthrough in sensitivity for nuclides in wide mass ranges. These developments include the use of bunched beams from the radiofrequency quadrupole cooler-buncher ISCOOL, which allows a suppression of background by several orders of magnitude. Very recently, the combination of collinear laser spectroscopy with the principle of laser resonance ionisation took shape in the new CRIS setup, providing a very selective and efficient detection of optical resonance. We outline the basic experimental developments and discuss important results on nuclei or chains of isotopes in different mass ranges.

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Section: New Methods and Highlights Since 2000supporting

confidence: 64%

Collinear laser spectroscopy at ISOLDE: new methods and highlights

Neugart

Billowes

Bissell

et al. 2017

J. Phys. G: Nucl. Part. Phys.

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“…Neutron-rich 33 Al nuclei were produced and spin polarized in a projectile fragmentation reaction induced by a 36 S 16+ primary beam (77 MeV/u and 1.8 μA) on a 1018-μm thick 9 Be target. After selection in the LISE3 fragment separator, a 94% pure beam of 33 Al (8 × 10 3 particles per second) was guided to the β-NMR/NQR setup [22].…”

Section: Methodsmentioning

confidence: 99%

“…order to understand the origin of the changing nuclear structure [5][6][7][8][9][10]. Moreover, it is recognized that the development of deformation happens gradually as a function of N and Z [11].…”

Section: Introductionmentioning

confidence: 99%

High-precision quadrupole moment reveals significant intruder component inAl201333ground state

et al. 2016

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The electric quadrupole moment of the 33 13 Al 20 ground state, located at the border of the island of inversion, was obtained using continuous-beam β-detected nuclear quadrupole resonance (β-NQR). From the measured quadrupole coupling constant ν Q = 2.31(4) MHz in an α-Al 2 O 3 crystal, a precise value for the electric quadrupole moment is extracted: |Q s ( 33 Al)| = 141(3) mb. A comparison with large-scale shell model calculations shows that 33 Al has at least 50% intruder configurations in the ground state wave function, favoring the excitation of two neutrons across the N = 20 shell gap.33 Al therefore clearly marks the gradual transition north of the deformed Na and Mg nuclei towards the normal Z 14 isotopes.

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“…The cross section is accurately measured with recent intense beam facilities and the measurement now reaches beyond the sd-shell nuclei [9][10][11]. Compared to other methods, e.g., proton-nucleus scattering [12][13][14] and isotope shift measurements [15][16][17], the method has the great * whoriuchi@nucl.sci.hokudai.ac.jp advantage that it can be applied to almost all nuclei as long as they are produced in sufficient number. Furthermore, a theoretical model to evaluate high energy σ R values is well established.…”

Section: Introductionmentioning

confidence: 99%

Extracting nuclear sizes of medium to heavy nuclei from total reaction cross sections

et al. 2016

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Background: Proton and neutron radii are fundamental quantities of atomic nuclei. To study the sizes of short-lived unstable nuclei, there is a need for an alternative to electron scattering. Purpose: The recent paper by Horiuchi et al. [Phys. Rev. C 89, 011601(R) (2014)] proposed a possible way of extracting the matter and neutron-skin thickness of light-to medium-mass nuclei using total reaction cross section, σ R . The analysis is extended to medium to heavy nuclei up to lead isotopes with due attention to Coulomb breakup contributions as well as density distributions improved by paring correlation. Methods:We formulate a quantitative calculation of σ R based on the Glauber model including the Coulomb breakup. To substantiate the treatment of the Coulomb breakup, we also evaluate the Coulomb breakup cross section due to the electric dipole field in a canonical-basis-time-dependent-Hartree-Fock-Bogoliubov theory in the three-dimensional coordinate space. Results: We analyze σ R 's of 103 nuclei with Z = 20, 28, 40, 50, 70, and 82 incident on light targets, 1,2 H, 4 He, and 12 C. Three kinds of Skyrme interactions are tested to generate those wave functions. To discuss possible uncertainty due to the Coulomb breakup, we examine its dependence on the target, the incident energy, and the Skyrme interaction. The proton is a most promising target for extracting the nuclear sizes as the Coulomb excitation can safely be neglected. We find that the so-called reaction radius, a R = √ σ R /π, for the proton target is very well approximated by a linear function of two variables, the matter radius and the skin thickness, in which three constants depend only on the incident energy. We quantify the accuracy of σ R measurements needed to extract the nuclear sizes. Conclusions:The proton is the best target because, once the incident energy is set, its a R is very accurately determined by only the matter radius and neutron-skin thickness. If σ R 's at different incident energies are measured, one can determine both the proton and neutron radii for unstable nuclei as well. The total reaction cross sections calculated in this paper are given as Supplemental Material for the sake of future measurements.

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Nuclear Charge Radii ofMg21−32

Cited by 78 publications

References 36 publications

Collinear laser spectroscopy at ISOLDE: new methods and highlights

Collinear laser spectroscopy at ISOLDE: new methods and highlights

High-precision quadrupole moment reveals significant intruder component inAl201333ground state

Extracting nuclear sizes of medium to heavy nuclei from total reaction cross sections

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