Neutron deformation in Ho165

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

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Abstract

We report asymmetries in the forward-angle differential cross sections for pion single-charge-exchange scattering from oriented and unoriented Ho165 nuclei. These asymmetries are directly related to the neutron deformation of a nucleus that has a large charge quadrupole moment. The measured asymmetry extrapolated to 0°is -0.0200.024. In the model of Chiang and Johnson, this value implies a quadrupole deformation ratio 2n/2p=0.840.08, indicating that the excess neutrons are less deformed than the protons. This result conflicts with the predictions of the best available Hartree-Fock models based on Skyrme interactions. We also report on asymmetries of the nonresonant continuum and of the giant dipole resonances.

Original languageEnglish (US)
Pages (from-to)909-917
Number of pages9
JournalPhysical Review C
Volume50
Issue number2
DOIs
StatePublished - Jan 1 1994

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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    Knudson, J. N., Bowman, J. D., Penttilä, S. I., Comfort, J. R., Tinsley, J., Ritchie, B., Görgen, J., Mathis, D., Hanna, S. S., King, B., Počanić, D., Loveman, R. A., Fritz, L. S., & Dixon, N. S. (1994). Neutron deformation in Ho165. Physical Review C, 50(2), 909-917. https://doi.org/10.1103/PhysRevC.50.909