The nuclear electric polarizability of 6He

Abstract

We present an estimate of the nuclear electric polarizability of the 6He halo nucleus based on six-body microscopic calculations. Wave functions are obtained from semi-realistic two-body interactions using the hyperspherical harmonics expansion method. The polarizability is calculated as a sum rule of the dipole response function using the Lanczos algorithm and also by integrating the photo-absorption cross section calculated via the Lorentz integral transform method. We obtain alpha_E=1.00(14) fm^3, which is much smaller than the published value 1.99(40) fm^3 extracted from experimental data. This points towards a potential disagreement between microscopic theories and experimental observations.

8 pages, 8 figures, minor changes, added error analysis

References in corpus (1)

• Photonuclear sum rules and the tetrahedral configuration of ${}^4$He

Cited by in corpus (8)

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• Improved estimates of the nuclear structure corrections in $\mu$D
• Benchmark calculations of electromagnetic sum rules with a symmetry-adapted basis and hyperspherical harmonics
• Electric dipole response of ${}^6$He: Halo-neutron and core excitations
• Electromagnetic Observables in Few-Nucleon Systems
• Electric dipole polarizability: from few- to many-body systems
• Neutron-rich Helium isotopes based on hyperspherical harmonics