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

doi:10.1103/PhysRevC.50.909

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

CLAS-NS: Physics

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

1 Scopus citations

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 language	English (US)
Pages (from-to)	909-917
Number of pages	9
Journal	Physical Review C
Volume	50
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevC.50.909
State	Published - Jan 1 1994

ASJC Scopus subject areas

Nuclear and High Energy Physics

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title = "Neutron deformation in Ho165",

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.",

author = "Knudson, {J. N.} and Bowman, {J. D.} and Penttil{\"a}, {S. I.} and Comfort, {J. R.} and J. Tinsley and Barry Ritchie and J. G{\"o}rgen and D. Mathis and Hanna, {S. S.} and B. King and D. Po{\v c}ani{\'c} and Loveman, {R. A.} and Fritz, {L. S.} and Dixon, {N. S.}",

year = "1994",

month = jan,

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doi = "10.1103/PhysRevC.50.909",

language = "English (US)",

volume = "50",

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publisher = "American Physical Society",

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TY - JOUR

T1 - Neutron deformation in Ho165

AU - Knudson, J. N.

AU - Bowman, J. D.

AU - Penttilä, S. I.

AU - Comfort, J. R.

AU - Tinsley, J.

AU - Ritchie, Barry

AU - Görgen, J.

AU - Mathis, D.

AU - Hanna, S. S.

AU - King, B.

AU - Počanić, D.

AU - Loveman, R. A.

AU - Fritz, L. S.

AU - Dixon, N. S.

PY - 1994/1/1

Y1 - 1994/1/1

N2 - 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.

AB - 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.

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