Neutron deformation in <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">Ho</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>165</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math></span>

J. N. Knudson; J. D. Bowman; S. I. Penttilä; J. R. Comfort; B. G. Ritchie; J. Goergen; D. Mathis; J. Tinsley; S. S. Hanna; B. King; D. Počanić; R. A. Loveman; L. S. Fritz; N. S. Dixon

doi:10.1103/PhysRevLett.66.1026

Neutron deformation in ${}^{165}{Ho}$

J. N. Knudson, J. D. Bowman, S. I. Penttilä, J. R. Comfort, B. G. Ritchie, J. Goergen, D. Mathis, J. Tinsley, S. S. Hanna, B. King, D. Počanić, R. A. Loveman, L. S. Fritz, and N. S. Dixon

Phys. Rev. Lett. 66, 1026 – Published 25 February 1991

Abstract

Measurements are reported of orientation asymmetries in the forward-angle differential cross sections for pion single-charge-exchange scattering of aligned and unaligned ${}^{165}{Ho}$ nuclei. The extrapolated 0° asymmetry of -0.022±0.024 indicates a quadrupole deformation ratio $β_{2}^{a}$ / $β_{2}^{c}$ =0.84±0.08. This result conflicts with the predictions of the best available Hartree-Fock models.