The quadrupole moment of the neutron-halo nucleus11Li

Arnold, E.; Bonn, J.; Klein, Alexander; Lievens, Peter; Neugart, R.; Neuroth, M; Otten, E.‐W.; Reich, H.; Widdra, W.

doi:10.1007/bf01288986

Cited by 14 publications

(48 citation statements)

References 12 publications

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“…For the three transitions in neutral lithium the average values and the corresponding standard deviation are listed. The overall average of all measurements is −0.63 (20) fm 2 , where the uncertainty is given by the standard deviation. The average of the bold printed δ r 2 6,7 values from [14,94] and this work is −0.734(40) fm 2 and is indicated in Fig.…”

Section: Extraction Of δ R 2 C For 67 Limentioning

confidence: 99%

“…Spectroscopy on trapped ions or atoms has proved to provide the required sensitivity and accuracy for such measurements [16,17]; however, the 11 Li lifetime is much too short to allow sufficient time for trapping and cooling. The 2s 2 S 1/2 → 2p 2 P J transitions in Li were used previously for several investigations of 8,9,11 Li in collinear laser spectroscopy by optical pumping and β nuclear magnetic resonance (β-NMR) detection [18][19][20][21][22]. In these cases the lithium ions, provided by the ISOLDE radioactive beam facility at CERN, were neutralized in flight in a charge exchange cell and then used as a fast atomic beam.…”

Section: Introductionmentioning

confidence: 99%

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Isotope-shift measurements of stable and short-lived lithium isotopes for nuclear-charge-radii determination

et al. 2011

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Changes in the mean square nuclear charge radii along the lithium isotopic chain were determined using a combination of precise isotope shift measurements and theoretical atomic structure calculations. Nuclear charge radii of light elements are of high interest due to the appearance of the nuclear halo phenomenon in this region of the nuclear chart. During the past years we have developed a laser spectroscopic approach to determine the charge radii of lithium isotopes which combines high sensitivity, speed, and accuracy to measure the extremely small field shift of an 8-ms-lifetime isotope with production rates on the order of only 10 000 atoms/s. The method was applied to all bound isotopes of lithium including the two-neutron halo isotope 11 Li at the on-line isotope separators at GSI, Darmstadt, Germany, and at TRIUMF, Vancouver, Canada. We describe the laser spectroscopic method in detail, present updated and improved values from theory and experiment, and discuss the results.

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Section: Extraction Of δ R 2 C For 67 Limentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Isotope-shift measurements of stable and short-lived lithium isotopes for nuclear-charge-radii determination

et al. 2011

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“…We describe the tensor correlations in 9 Li fully in the tensor-optimized shell model, where the variation of the size parameters of the single particle orbits is essential for getting strong tensor correlations. We have shown in our previous study that in 10,11 Li the tensor and pairing correlations in 9 Li are Pauli-blocked by additional valence neutrons, which make the p-shell configurations pushed up in energy. As a result, the s 2 valence neutron component increases to reveal the halo structure of 11 Li and the inversion phenomenon of the single particle spectrum in 10 Li arises.…”

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confidence: 94%

Systematic Study of 9,10,11Li with the Tensor and Pairing Correlations

Myo

Kikuchi

Katō

et al. 2008

Progress of Theoretical Physics

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We make a systematic study of Li isotopes (A = 9, 10, 11) in the tensor optimized shell model for 9 Li and treat the additional valence neutrons in the cluster model approach by taking into account the Pauli-blocking effect caused by the tensor and pairing correlations. We describe the tensor correlations in 9 Li fully in the tensor-optimized shell model, where the variation of the size parameters of the single particle orbits is essential for getting strong tensor correlations. We have shown in our previous study that in 10,11 Li the tensor and pairing correlations in 9 Li are Pauli-blocked by additional valence neutrons, which make the p-shell configurations pushed up in energy. As a result, the s 2 valence neutron component increases to reveal the halo structure of 11 Li and the inversion phenomenon of the single particle spectrum in 10 Li arises. Following the previous study, we demonstrate the reliability of our framework by performing a detailed systematic analysis of the structures of 9,10,11 Li, such as the charge radius, the spatial correlation of halo neutrons of 11 Li and the electromagnetic properties of Li isotopes. The detailed effects of the Pauli-blocking on the spectroscopic properties of 10,11 Li are also discussed. It is found that the blocking acts strongly for the 11 Li ground state rather than for 10 Li and for the dipole excited states of 11 Li, which is mainly caused by the interplay between the tensor correlation in 9 Li and the halo neutrons. The results obtained in these analyses clearly show that the inert core assumption of 9 Li is not realistic to explain the anomalous structures observed in 10,11 Li. For the dipole excitation spectrum of 11 Li, the effect of the final state interactions is discussed in terms of the dipole strength function. * )

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“…However, it was only recently that such measurements became possible for the radioactive isotopes of the lightest nuclei [3][4][5][6]. Based on new and very specialized techniques, two groups have succeeded in measuring, for the first time, optical isotope shifts of very light radioactive nuclei (Z<10) with a precision that is sufficient to extract nuclear charge radii.…”

Section: Introductionmentioning

confidence: 99%

“…11 Li was the first halo nucleus that was studied in this way. In a series of measurements the COLLAPS collaboration at ISOLDE determined the nuclear magnetic dipole moment and the electric quadrupole moment using the β-NMR technique [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Towards a nuclear charge radius determination for beryllium isotopes

et al. 2006

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We propose determination of isotope shifts for radioactive beryllium isotopes using laser cooled ions in a linear radio frequency (RF) trap. Based on these measurements, combined with precise mass shift calculations, it will be possible to extract modelindependent nuclear charge radii of 7,9,10 Be and the one-neutron halo 11 Be with precision better than 3%. Radioactive beryllium isotopes produced at ISOLDE and ionized with a laser ion source will be cooled and bunched in the radio frequency quadrupole buncher of ISOLTRAP. Ion temperatures will be reduced to the mK range by sympathetic cooling with co-trapped laser cooled ions in a specially designed two-stage linear RF trap. Resonances will be detected via fluorescence and frequencies measured with a femtosecond frequency comb.

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The quadrupole moment of the neutron-halo nucleus11Li

Cited by 14 publications

References 12 publications

Isotope-shift measurements of stable and short-lived lithium isotopes for nuclear-charge-radii determination

Isotope-shift measurements of stable and short-lived lithium isotopes for nuclear-charge-radii determination

Systematic Study of 9,10,11Li with the Tensor and Pairing Correlations

Towards a nuclear charge radius determination for beryllium isotopes

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