Masses and Charge Radii of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi>Ne</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>17</mml:mn><mml:mo>–</mml:mo><mml:mn>22</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>and the Two-Proton-Halo Candidate<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi>Ne</mml:mi><mml:mprescripts /><mml:none /><mml:mn>17</mml:mn></mml:mmultiscripts></mml:math>

Geithner, W.; Neff, Thomas; Audi, G.; Blaum, Klaus; Delahaye, P.; Feldmeier, H.; George, Sebastian; Guénaut, C.; Herfurth, F.; Herlert, A.; Kappertz, S.; Keim, M.; Kellerbauer, A.; Kluge, H.‐J.; Kowalska, M.; Lievens, Peter; Lunney, D.; Marinova, K. P.; Neugart, R.; Schweikhard, L.; Wilbert, S.; Yazidjian, C.

doi:10.1103/physrevlett.101.252502

Cited by 117 publications

(109 citation statements)

References 29 publications

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“…The changes in mass and nuclear mean square charge radii were taken from Ref. [3]. As can be seen from this table, our isotope shifts are in good agreement with experimental values, and the difference is less than 4%.…”

Section: Isotope Shift In the 2psupporting

confidence: 75%

“…To confirm this speculation, many investigations have been stimulated to be performed [3,4]. However, the evidence for 17 Ne was not conclusive due to conflicting theoretical and experimental results.…”

Section: Introductionmentioning

confidence: 99%

“…However, the evidence for 17 Ne was not conclusive due to conflicting theoretical and experimental results. Experiments were carried out at ISOLDE/CERN to measure hyperfine structures and isotope shifts of the transition 2p 5 3s 2 [3/2] o 2 − −2p 5 3p 2 [3/2] 2 (λ = 614.5 nm) of 17 Ne and other unstable neon isotopes up to the neutron-rich 28 Ne by using fast-beam collinear laser spectroscopy [5,6,3,7]. The magnetic dipole and the electric quadrupole moments and the charge radii of the nuclei were deduced from these measurements in combination with atomic parameters.…”

Section: Introductionmentioning

confidence: 99%

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Atomic parameters for the $2{p}^{5}3p\;{}^{2}{[3/2]}_{2}-2{p}^{5}3s\;{}^{2}{[3/2]}_{2}^{o}$ transition of Ne I relevant in nuclear physics

Godefroid

Wang

2016

J. Phys. B: At. Mol. Opt. Phys.

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We calculated the magnetic dipole hyperfine interaction constants and the electric field gradients of 2p 5 3p 2 [3/2] 2 and 2p 5 3s 2 [3/2] o 2 levels of Ne I by using the multiconfiguration Dirac-Hartree-Fock method. The electronic factors contributing to the isotope shifts were also estimated for the λ = 614.5 nm transition connecting these two states. Electron correlation and relativistic effects including the Breit interaction were investigated in details. Combining with recent measurements, we extracted the nuclear quadrupole moment values for 20 Ne and 23 Ne with a smaller uncertainty than the current available data. Isotope shifts in the 2p 5 3p 2 [3/2] 2 − 2p 5 3s 2 [3/2] o 2 transition based on the present calculated field-and mass-shift parameters are in good agreement with the experimental values. However, the field shifts in this transition are two or three orders of magnitude smaller than the mass shifts, making rather difficult to deduce changes in nuclear charge mean square radii. According to our theoretical predictions, we suggest to use instead transitions connecting levels arising from the 2p 5 3s configuration to the ground state, for which the normal mass shift and specific mass shift contributions counteract each other, producing relatively small mass shifts that are only one order of magnitude larger than relatively large field shifts, especially for the 2p 5 3s 2 [1/2] o 1 − 2p 6 1 S 0 transition.

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Section: Isotope Shift In the 2psupporting

confidence: 75%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Atomic parameters for the $2{p}^{5}3p\;{}^{2}{[3/2]}_{2}-2{p}^{5}3s\;{}^{2}{[3/2]}_{2}^{o}$ transition of Ne I relevant in nuclear physics

Godefroid

Wang

2016

J. Phys. B: At. Mol. Opt. Phys.

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“…However, this experiment was not exclusive to the removal of halo protons, but also includes that of the core protons. Further reported s 2 -weights are 40 % [8], "dominant" [9], and 15 % [10]. Our aim is to provide a conclusive result.…”

Section: Introductionmentioning

confidence: 64%

Exclusive measurements of nuclear breakup reactions of¹⁷Ne

Wamers

Marganiec

Aksouh

et al. 2014

EPJ Web of Conferences

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“…[16], do not show the usual monotonic increase with mass number, while the matter radii seem to increase monotonically from 18 Ne on, see Fig. 3.…”

Section: Neon Isotopes and Two-proton Halomentioning

confidence: 99%

Clusters, Halos, And S-Factors In Fermionic Molecular Dynamics^*

Feldmeier

Neff

2013

EPJ Web of Conferences

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Abstract. In Fermionic Molecular Dynamics antisymmetrized products of Gaussian wave packets are projected on angular momentum, linear momentum, and parity. An appropriately chosen set of these states span the many-body Hilbert space in which the Hamiltonian is diagonalized. The wave packet parameters -position, momentum, width and spin -are obtained by variation under constraints. The great flexibility of this basis allows to describe not only shell-model like states but also exotic states like halos, e.g. the two-proton halo in 17 Ne, or cluster states as they appear for example in 12 C close to the α breakup threshold where the Hoyle state is located. Even a fully microscopic calculation of the 3 He(α,γ) 7 Be capture reaction is possible and yields an astrophysical S-factor that compares very well with newer data. As representatives of numerous results these cases will be discussed in this contribution, some of them not published so far. The Hamiltonian is based on the realistic Argonne V18 nucleon-nucleon interaction. Fermionic Molecular Dynamics (FMD)In the FMD approach we employ Gaussian wave packetsas single-particle basis states. The complex parameters b encode the mean positions and momenta of the wave packets and a the widths of the wave packets. The spins can assume any direction, isospin is ±1 denoting a proton or a neutron. Intrinsic many-body basis states are Slater determinantsthat reflect deformation or clustering and break the symmetries of the Hamiltonian with respect to parity, rotation and translation. To restore the symmetries the intrinsic basis states are projected on parity, angular momentum and total linear momentumIn a full FMD calculation the many-body Hilbert space is spanned by a set of N projected intrinsic basis states Q (a) ; J π MK; P = 0 , a = 1, . . . , N . By diagonalizing the Hamiltonian in this set of non-orthogonal basis states the amplitudes of the various configurations contained in the many-body eigenstate are determined.Starting from the realistic Argonne V18 interaction [1] we derive a phase-shift-equivalent effective lowmomentum interaction using the unitary correlation operator method (UCOM). The basic idea of the UCOM approach is to explicitly include short-range central and Cluster States in 1CThe structure of the second 0 + 2 state in 12 C, the Hoyle state, is enjoying renewed and still growing interest in nuclear structure research [5][6][7][8][9]. In [10] we investigated its structure with a model space spanned by angular momentum projected FMD configurations obtained by variation plus a full set of projected three-α triangular configurations. We found that the Hoyle state is very dilute and extended, consisting mainly of well distinguished α-clusters. This is illustrated in the top part of Fig. 1 where we show the density distribution of those intrinsic FMD basis states that have the largest overlap with the ground state and the Hoyle state.While the leading intrinsic configuration of the ground state is very compact, and after projection on good angular moment...

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Masses and Charge Radii ofNe17–22and the Two-Proton-Halo CandidateNe17

Cited by 117 publications

References 29 publications

Atomic parameters for the $2{p}^{5}3p\;{}^{2}{[3/2]}_{2}-2{p}^{5}3s\;{}^{2}{[3/2]}_{2}^{o}$ transition of Ne I relevant in nuclear physics

Atomic parameters for the $2{p}^{5}3p\;{}^{2}{[3/2]}_{2}-2{p}^{5}3s\;{}^{2}{[3/2]}_{2}^{o}$ transition of Ne I relevant in nuclear physics

Exclusive measurements of nuclear breakup reactions of¹⁷Ne

Clusters, Halos, And S-Factors In Fermionic Molecular Dynamics^*

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Masses and Charge Radii ofNe17–22and the Two-Proton-Halo CandidateNe17

Cited by 117 publications

References 29 publications

Atomic parameters for the $2{p}^{5}3p\;{}^{2}{[3/2]}_{2}-2{p}^{5}3s\;{}^{2}{[3/2]}_{2}^{o}$ transition of Ne I relevant in nuclear physics

Atomic parameters for the $2{p}^{5}3p\;{}^{2}{[3/2]}_{2}-2{p}^{5}3s\;{}^{2}{[3/2]}_{2}^{o}$ transition of Ne I relevant in nuclear physics

Exclusive measurements of nuclear breakup reactions of17Ne

Clusters, Halos, And S-Factors In Fermionic Molecular Dynamics*

Contact Info

Product

Resources

About

Exclusive measurements of nuclear breakup reactions of¹⁷Ne

Clusters, Halos, And S-Factors In Fermionic Molecular Dynamics^*