Abstract
We propose to determine the nuclear charge radius of 8B by high-resolution laser spectroscopy. 8B (t 1/2 = 770 ms) is perhaps the best candidate of a nucleus exhibiting an extended proton wave-function or “one-proton-halo” in a more descriptive picture. Laser spectroscopic measurements of the isotope shift will be used to probe the change in nuclear charge radius along the three boron isotopes 8B, 10B and 11B. The change in nuclear charge radius directly correlates with the extent of the proton wave function. In-flight production and preparation of sufficient yields of 8B ions at low energies is provided by the Argonne Tandem Linac Accelerator System (ATLAS) at Argonne National Laboratory (ANL) in Chicago, IL, USA. Subsequently, the ions will be guided through a charge exchange cell for neutralization and the fluorescence signal of the atoms which interact with the resonant laser light will be detected. The charge radius can then be extracted from the measured isotope shift by employing highly accurate atomic theory calculations of this five-electron system which are carried out presently.
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References
Tanihata, I., et al.: Measurements of Interaction Cross Sections and Nuclear Radii in the Light p-Shell Region. Phys. Rev. Lett. 55, 2676–2679 (1985)
Lu, Z.T., et al.: Laser probing of neutron-rich nuclei in light atoms. Rev. Mod. Phys. 85, 1383–1400 (2013)
Wang, L.B., et al.: Laser Spectroscopic Determination of the 6He Nuclear Charge Radius. Phys. Rev. Lett. 93, 142501 (2004)
Müller, P., et al.: Nuclear Charge Radius of 8He. Phys. Rev. Lett. 99, 252501 (2007)
Ewald, G., et al.: Nuclear Charge Radii of Li-8, Li-9 Determined by Laser Spectroscopy. Phys. Rev. Lett. 93, 113002 (2004)
Sánchez, R., et al.: Nuclear Charge Radii of 9,11Li: The Influence of Halo Neutrons. Phys. Rev. Lett. 96, 033002 (2006)
Nörtershäuser, W., et al.: Nuclear Charge Radii of 7,9,10Be and the One-Neutron Halo Nucleus 11Be. Phys. Rev. Lett. 102, 062503 (2009)
Krieger, A., et al.: Nuclear Charge Radius of 12Be. Phys. Rev. Lett. 108, 142501 (2012)
Krieger, A., et al.: Frequency-comb referenced collinear laser spectroscopy of Be + for nuclear structure investigations and many-body QED tests. Appl. Phys. B 123, 15 (2017)
Geithner, W., et al.: Masses and Charge Radii of 17−22Ne and the Two-Proton-Halo Candidate 17Ne. Phys. Rev. Lett. 101, 252502 (2008)
Sumikama, T., et al.: Electric quadrupole moment of the proton halo nucleus 8B. Phys. Rev. C 74, 024327 (2006)
Pieper, S.C., et al.: Quantum Monte Carlo Calculations of Light Nuclei. Annu. Rev. Nucl. Part. Sci. (2001)
Navrátil, P., et al.: Recent developments in no-core shell-model calculations. J. Phys. G 36(8), 083101 (2009)
Neff, T., et al.: Clustering and other exotic phenomena in nuclei. Eur. Phys. J Spec. Top. 156(1), 69–92 (2008)
Ryberg, E., et al.: Effective field theory for proton halo nuclei. Phys. Rev. C 89, 014325 (2014)
Kramida, A.E., et al.: A critical compilation of energy levels and spectral lines of neutral boron. Phys. Scr. 76(5), 544 (2007)
Ryberg, E., et al.: Constraining low-energy proton capture on beryllium-7 through charge radius measurements. Eur. Phys. J. A 50, 170 (2014)
Yan, Z.C., et al.: Lithium isotope shifts as a measure of nuclear size. Phys. Rev. A 61, 022504 (2000)
Puchalski, M., et al.: Isotope shift in a beryllium atom. Phys. Rev. A 89, 012506 (2014)
Puchalski, M., et al.: Explicitly correlated wave function for a boron atom. Phys. Rev. A 92, 062501 (2015)
Schaller, L., et al.: Nuclear charge radii from muonic X-ray transitions in beryllium, boron, carbon and nitrogen. Nucl. Phys. A 343, 333–346 (1980)
Sternberg, M., et al.: Limit on Tensor Currents from 8Li β Decay. Phys. Rev. Lett. 115, 182501 (2015)
Galvȧn, A.P., et al.: Status Update on the β-nu Correlation Measurement in the β Decay of 8B. JPS Conf. Proc. 6, 030071 (2015)
Li, G., et al.: Tensor Interaction Limit Derived from the α- β-\(\overline {\nu }\) Correlation in Trapped 8Li Ions. Phys. Rev. Lett. 110, 092502 (2013)
Gorges, C., et al.: Isotope shift of 40,42,44,48Ca in the 4s \({~}^2\textit {S}_{1/2}\rightarrow \) 4p 2 P 3/2 transition. J. Phys. B 48, 245008 (2015)
Ketelaer, J., et al.: TRIGA-SPEC: A setup for mass spectrometry and laser spectroscopy at the research reactor TRIGA Mainz. Nucl. Instr. Meth. Phys. Res. A 594(2), 162–177 (2008)
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This article is part of the Topical Collection on Proceedings of the 10th International Workshop on Application of Lasers and Storage Devices in Atomic Nuclei Research: “Recent Achievements and Future Prospects” (LASER 2016), Poznań, Poland, 16–19 May 2016
Edited by Krassimira Marinova, Magdalena Kowalska and Zdzislaw Błaszczak
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Maaß, B., Müller, P., Nörtershäuser, W. et al. Towards laser spectroscopy of the proton-halo candidate boron-8. Hyperfine Interact 238, 25 (2017). https://doi.org/10.1007/s10751-017-1399-5
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DOI: https://doi.org/10.1007/s10751-017-1399-5