Nuclear charge radius of 11Li

Rodolfo Sánchez; Wilfried Nörtershäuser; Andreas Dax; Guido Ewald; Stefan Götte; Reinhard Kirchner; H. Jürgen Kluge; Thomas Kühl; Agnieszka Wojtaszek; Bruce A. Bushaw; Gordon W.F. Drake; Zong Chao Yan; Claus Zimmermann; Daniel Albers; John Behr; Pierre Bricault; Jens Dilling; Marik Dombsky; Jens Lassen; C. D.Phil Levy; Matthew R. Pearson; Erika J. Prime; Vladimir Ryjkov

doi:10.1007/s10751-007-9507-6

Nuclear charge radius of ¹¹Li

Rodolfo Sánchez, Wilfried Nörtershäuser, Andreas Dax, Guido Ewald, Stefan Götte, Reinhard Kirchner, H. Jürgen Kluge, Thomas Kühl, Agnieszka Wojtaszek, Bruce A. Bushaw, Gordon W.F. Drake, Zong Chao Yan, Claus Zimmermann, Daniel Albers, John Behr, Pierre Bricault, Jens Dilling, Marik Dombsky, Jens Lassen, C. D.Phil LevyMatthew R. Pearson, Erika J. Prime, Vladimir Ryjkov

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

We have determined the nuclear charge radius of ¹¹Li by high-precision laser spectroscopy. The experiment was performed at the TRIUMF-ISAC facility where the ⁷Li-¹¹Li isotope shift (IS) was measured in the 2s → 3s electronic transition using Doppler-free two-photon spectroscopy with a relative accuracy better than 10^-5. The accuracy for the IS of the other lithium isotopes was also improved. IS's are mainly caused by differences in nuclear mass, but changes in proton distribution also give small contributions. Comparing experimentally measured IS with advanced atomic calculation of purely mass-based shifts, including QED and relativistic effects, allows derivation of the nuclear charge radii. The radii are found to decrease monotonically from ⁶Li to ⁹Li, and then increase with ¹¹Li about 11% larger than ⁹Li. These results are a benchmark for the open question as to whether nuclear core excitation by halo neutrons is necessary to explain the large nuclear matter radius of ¹¹Li; thus, the results are compared with a number of nuclear structure models.

Original language	English
Pages (from-to)	181-188
Number of pages	8
Journal	Hyperfine Interactions
Volume	171
Issue number	1-3
DOIs	https://doi.org/10.1007/s10751-007-9507-6
State	Published - Jul 2006
Externally published	Yes

Funding

Acknowledgements This work is supported from BMBF Contract No. 06TU203 and EURONS (European Commission Contract No. 506065). Support from the U.S. DOE Office of Science (B.A.B.), NRC through TRIUMF, and NSERC and SHARCnet.(G.W.F.D. and Z.-C.Y.) is acknowledged. A.W. was supported by a Marie-Curie Fellowship of the European Community Programme IHP under contract number HPMT-CT-2000-00197.

Funders	Funder number
EURONS
European Community Programme IHP	HPMT-CT-2000-00197
SHARCnet
Office of Science
FP7 People: Marie-Curie Actions
National Research Council
Natural Sciences and Engineering Research Council of Canada
European Commission	506065
Bundesministerium für Bildung und Forschung	06TU203

Keywords

Halo nucleus
Isotope shift
Laser spectroscopy
Lithium
Nuclear charge radius

Access to Document

10.1007/s10751-007-9507-6

Cite this

Sánchez, R., Nörtershäuser, W., Dax, A., Ewald, G., Götte, S., Kirchner, R., Kluge, H. J., Kühl, T., Wojtaszek, A., Bushaw, B. A., Drake, G. W. F., Yan, Z. C., Zimmermann, C., Albers, D., Behr, J., Bricault, P., Dilling, J., Dombsky, M., Lassen, J., ... Ryjkov, V. (2006). Nuclear charge radius of ¹¹Li. Hyperfine Interactions, 171(1-3), 181-188. https://doi.org/10.1007/s10751-007-9507-6

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title = "Nuclear charge radius of 11Li",

abstract = "We have determined the nuclear charge radius of 11Li by high-precision laser spectroscopy. The experiment was performed at the TRIUMF-ISAC facility where the 7Li-11Li isotope shift (IS) was measured in the 2s → 3s electronic transition using Doppler-free two-photon spectroscopy with a relative accuracy better than 10-5. The accuracy for the IS of the other lithium isotopes was also improved. IS's are mainly caused by differences in nuclear mass, but changes in proton distribution also give small contributions. Comparing experimentally measured IS with advanced atomic calculation of purely mass-based shifts, including QED and relativistic effects, allows derivation of the nuclear charge radii. The radii are found to decrease monotonically from 6Li to 9Li, and then increase with 11Li about 11% larger than 9Li. These results are a benchmark for the open question as to whether nuclear core excitation by halo neutrons is necessary to explain the large nuclear matter radius of 11Li; thus, the results are compared with a number of nuclear structure models.",

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year = "2006",

month = jul,

doi = "10.1007/s10751-007-9507-6",

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Sánchez, R, Nörtershäuser, W, Dax, A, Ewald, G, Götte, S, Kirchner, R, Kluge, HJ, Kühl, T, Wojtaszek, A, Bushaw, BA, Drake, GWF, Yan, ZC, Zimmermann, C, Albers, D, Behr, J, Bricault, P, Dilling, J, Dombsky, M, Lassen, J, Levy, CDP, Pearson, MR, Prime, EJ & Ryjkov, V 2006, 'Nuclear charge radius of ¹¹Li', Hyperfine Interactions, vol. 171, no. 1-3, pp. 181-188. https://doi.org/10.1007/s10751-007-9507-6

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T1 - Nuclear charge radius of 11Li

AU - Sánchez, Rodolfo

AU - Nörtershäuser, Wilfried

AU - Dax, Andreas

AU - Ewald, Guido

AU - Götte, Stefan

AU - Kirchner, Reinhard

AU - Kluge, H. Jürgen

AU - Kühl, Thomas

AU - Wojtaszek, Agnieszka

AU - Bushaw, Bruce A.

AU - Drake, Gordon W.F.

AU - Yan, Zong Chao

AU - Zimmermann, Claus

AU - Albers, Daniel

AU - Behr, John

AU - Bricault, Pierre

AU - Dilling, Jens

AU - Dombsky, Marik

AU - Lassen, Jens

AU - Levy, C. D.Phil

AU - Pearson, Matthew R.

AU - Prime, Erika J.

AU - Ryjkov, Vladimir

PY - 2006/7

Y1 - 2006/7

N2 - We have determined the nuclear charge radius of 11Li by high-precision laser spectroscopy. The experiment was performed at the TRIUMF-ISAC facility where the 7Li-11Li isotope shift (IS) was measured in the 2s → 3s electronic transition using Doppler-free two-photon spectroscopy with a relative accuracy better than 10-5. The accuracy for the IS of the other lithium isotopes was also improved. IS's are mainly caused by differences in nuclear mass, but changes in proton distribution also give small contributions. Comparing experimentally measured IS with advanced atomic calculation of purely mass-based shifts, including QED and relativistic effects, allows derivation of the nuclear charge radii. The radii are found to decrease monotonically from 6Li to 9Li, and then increase with 11Li about 11% larger than 9Li. These results are a benchmark for the open question as to whether nuclear core excitation by halo neutrons is necessary to explain the large nuclear matter radius of 11Li; thus, the results are compared with a number of nuclear structure models.

AB - We have determined the nuclear charge radius of 11Li by high-precision laser spectroscopy. The experiment was performed at the TRIUMF-ISAC facility where the 7Li-11Li isotope shift (IS) was measured in the 2s → 3s electronic transition using Doppler-free two-photon spectroscopy with a relative accuracy better than 10-5. The accuracy for the IS of the other lithium isotopes was also improved. IS's are mainly caused by differences in nuclear mass, but changes in proton distribution also give small contributions. Comparing experimentally measured IS with advanced atomic calculation of purely mass-based shifts, including QED and relativistic effects, allows derivation of the nuclear charge radii. The radii are found to decrease monotonically from 6Li to 9Li, and then increase with 11Li about 11% larger than 9Li. These results are a benchmark for the open question as to whether nuclear core excitation by halo neutrons is necessary to explain the large nuclear matter radius of 11Li; thus, the results are compared with a number of nuclear structure models.

KW - Halo nucleus

KW - Isotope shift

KW - Laser spectroscopy

KW - Lithium

KW - Nuclear charge radius

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DO - 10.1007/s10751-007-9507-6

M3 - Article

AN - SCOPUS:34147207211

SN - 0304-3843

VL - 171

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EP - 188

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