Neutron deformation in [sup 165]Ho

Journal Article · Mon Aug 01 04:00:00 EDT 1994 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.50.909· OSTI ID:7160736

Knudson, J N; Bowman, J D; Penttilae, S I ^[1]; Comfort, J R; Tinsley, J; Ritchie, B G; Goergen, J; Mathis, D ^[2]; Hanna, S S; King, B; Pocanic, D ^[3]; Loveman, R A ^[4]; Fritz, L S; Dixon, N S ^[5]

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1. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
2. Physics Department, Arizona State University, Tempe, Arizona 85287 (United States)
3. Physics Department, Stanford University, Palo Alto, California 94305 (United States)
4. Physics Department, University of Colorado, Boulder, Colorado 80309 (United States)
5. Physics Department, Franklin and Marshall College, Lancaster, Pennsylvania 17604 (United States)

We report asymmetries in the forward-angle differential cross sections for pion single-charge-exchange scattering from oriented and unoriented [sup 165]Ho 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[degree] is [minus]0.020[plus minus]0.024. In the model of Chiang and Johnson, this value implies a quadrupole deformation ratio [beta][sub 2][sup [ital n]]/[beta][sub 2][sup [ital p]]=0.84[plus minus]0.08, 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.

• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 7160736
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 50:2; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

663110 -- General & Average Properties of Nuclei & Nuclear Energy Levels-- (1992-)
663120 -- Nuclear Structure Models & Methods-- (1992-)
663460* -- Meson- & Hyperon-induced Reactions & Scattering-- (1992-)
663570 -- Nuclear Mass Ranges-- A=150-189-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ASYMMETRY
CALCULATION METHODS
CHARGE-EXCHANGE REACTIONS
CHARGED-PARTICLE REACTIONS
COLLECTIVE EXCITATIONS
COLLECTIVE MODEL
CROSS SECTIONS
DEFORMATION
ENERGY-LEVEL TRANSITIONS
EXCITATION
GIANT RESONANCE
HADRON REACTIONS
HARTREE-FOCK METHOD
HOLMIUM 165 TARGET
MATHEMATICAL MODELS
MESON REACTIONS
NUCLEAR DEFORMATION
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
NUCLEON-NUCLEON POTENTIAL
ORIENTED NUCLEI
PION REACTIONS
POTENTIALS
QUADRUPOLE MOMENTS
RESONANCE
SKYRME POTENTIAL
TARGETS