<i>N</i>and<i>Z</i>dependence of nuclear charge radii

Angeli, I.; Gangrsky, Yu. P.; Marinova, K. P.; Boboshin, I. N.; Komarov, S. Yu.; Ishkhanov, B. S.; Варламов, В.В.

doi:10.1088/0954-3899/36/8/085102

Cited by 60 publications

(87 citation statements)

References 79 publications

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“…Nuclear radii trends in the neutron f 7/2 shell. The present investigation of nuclear radii changes along the scandium isotopic chain complements the published results [4,5,7] on nuclear radii behaviour in the f 7/2 shell. This is illustrated in figures 5 and 6 where the absolute rms nuclear radii values, R = r 2 1/2 , are presented in terms of N and Z, respectively.…”

Section: Discussionsupporting

confidence: 86%

“…If a similar attempt is made for the ground state, a value of Q 0 ( 45g Sc) =-0.47(2) b may be deduced from the spectroscopic quadrupole moment, corresponding to a deformation of β 2 ( 45g Sc)= −0.154 (7). From these values and equation (11), assuming β 2 2 = β 2 2 , the estimated change in ms charge radii, δ r 2 45g,m = +0.43(20) fm 2 , is significantly higher than the experimental value of δ r 2 45g,m = +0.186(27) fm 2 .…”

Section: Discussionmentioning

confidence: 99%

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Nuclear charge radii and electromagnetic moments of radioactive scandium isotopes and isomers

Avgoulea¹,

Gangrsky²,

Marinova³

et al. 2011

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

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Abstract. Collinear laser spectroscopy experiments with the Sc + transition 3d4s 3 D 2 → 3d4p 3 F 3 at λ = 363.1 nm were performed on the 42−46 Sc isotopic chain using an ion guide isotope separator with a cooler-buncher. Nuclear magnetic dipole and electric quadrupole moments as well as isotope shifts were determined from the hyperfine structure for five ground states and two isomers. Extensive multi-configurational Dirac-Fock calculations were performed in order to evaluate the specific mass-shift, M SMS , and field-shift, F , parameters which allowed evaluation of the charge radii trend of the Sc isotopic sequence. The charge radii obtained show systematics more like the Ti radii, which increase towards the neutron shell closure N = 20, than the symmetric parabolic curve for Ca. The changes in mean square charge radii of the isomeric states relative to the ground states for 44 Sc and 45 Sc were also extracted. The charge radii difference between the ground and isomeric states of 45 Sc is in agreement with the deformation effect estimated from the B(E2) measurements but is smaller than the deformation extracted from the spectroscopic quadrupole moments.

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Section: Discussionsupporting

confidence: 86%

Section: Discussionmentioning

confidence: 99%

Nuclear charge radii and electromagnetic moments of radioactive scandium isotopes and isomers

Avgoulea¹,

Gangrsky²,

Marinova³

et al. 2011

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

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“…This gives rise to the characteristic slope changes (kinks) at magic neutron numbers, which are observed at all neutron shell closures with N 28 [60]. For the neon radii a distinct minimum is observed for 18 Ne at the classical shell closure N = 8.…”

Section: Shell Structure In the Neon Isotope Chainmentioning

confidence: 84%

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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“…The slight increased cases also include the neutron-deficient nuclei at Z ∼ 55 and N ∼ 40. These groups are normally quoted as typical "shape phase transition" or "shape coexistence" zones [30][31][32]. Sudden changes in the shape and single-particle distributions with the number of protons and neutrons result in a large residuals other than zero.…”

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confidence: 99%

New charge radius relations for atomic nuclei

et al. 2014

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We show that the charge radii of neighboring atomic nuclei, independent of atomic number and charge, follow remarkably very simple relations, despite the fact that atomic nuclei are complex finite many-body systems governed by the laws of quantum mechanics. These relations can be understood within the picture of independent-particle motion and by assuming that neighboring nuclei have similar patterns in the charge density distribution. A root-mean-square (rms) deviation of 0.0078 fm is obtained between the predictions in these relations and the experimental values, i.e., a precision comparable modern experimental techniques. Such high accuracy relations are very useful to check the consistence of the nuclear charge radius surface and moreover to predict unknown nuclear charge radii, while large deviations from experimental data are seen to reveal the appearance of nuclear shape transition or coexsitence.PACS numbers: 21.10. Ft, 21.90.+f, 27.70.+q, 29.87.+g Like many systems governed by the laws of quantum mechanics, the nucleus is an object full of mysteries whose properties are much more difficult to characterize than those of macroscopic objects. Rather than build an exact replica of the nuclear system (almost an impossible job), nuclear physicists in reality have selected a different approach, using a relatively small number of measurable properties of quantum systems to specify the overall characteristic of the entire nucleus. Investigations of these properties and moreover using them as bridges to reveal the atomic nucleus, form the basis of present nuclear physics investigations. Nuclear extension in space, often characterized by charge radius, is one of such static properties.Nowadays, nuclear size data [1] constitute one of the most precise and extensive arrays of experimental information available for the interpretation of nuclear phenomena. The pioneering works by using various methods such as electron scattering and muonic atomic spectroscopy [2], indicated that a nuclide near the β-stability line behaves like a solid sphere with constant density. In recent decades, the enormous progress in size determination of exotic nuclides has been entwined with the realization of radioactive ion beams [3] and fast developments especially in ultra-high-sensitivity laser spectroscopy techniques [4,5]. The new measurements contributed to revealing, for example, the neutron skin effect [6,7] and the nuclear shape variances [8][9][10] when moving far away from the stability line. These new results are among the strongest motivations for the next generations of nuclear physics facilities, in which electron-scattering experiments [11,12] on unstable nu- * Corresponding author: bhsun@buaa.edu.cn † ymzhao@sjtu.edu.cn clei are under way. In the march towards the new era of nuclear physics, the knowledge of nuclear sizes plays a very important role in understanding complex atomic nuclei.New precision data in turn challenge the present theories and trigger innovations to interpret the results and to understand underlying...

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NandZdependence of nuclear charge radii

Cited by 60 publications

References 79 publications

Nuclear charge radii and electromagnetic moments of radioactive scandium isotopes and isomers

Nuclear charge radii and electromagnetic moments of radioactive scandium isotopes and isomers

Charge radii of neon isotopes across thesdneutron shell

New charge radius relations for atomic nuclei

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