NEUTRON DEFORMATION IN HO-165

被引：2
作者：
KNUDSON, JN
BOWMAN, JD
PENTTILA, SI
COMFORT, JR
TINSLEY, J
RITCHIE, BG
GORGEN, J
MATHIS, D
HANNA, SS
KING, B
POCANIC, D
LOVEMAN, RA
FRITZ, LS
DIXON, NS
机构：
[1] ARIZONA STATE UNIV, DEPT PHYS, TEMPE, AZ 85287 USA
[2] STANFORD UNIV, DEPT PHYS, PALO ALTO, CA 94305 USA
[3] UNIV COLORADO, DEPT PHYS, BOULDER, CO 80309 USA
[4] FRANKLIN & MARSHALL COLL, DEPT PHYS, LANCASTER, PA 17604 USA
来源：
PHYSICAL REVIEW C | 1994年 / 50卷 / 02期
关键词：
D O I：
10.1103/PhysRevC.50.909
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
We report asymmetries in the forward-angle differential cross sections for pion single-charge-exchange scattering from oriented and unoriented Ho-165 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-degrees is -0.020 +/- 0.024. In the model of Chiang and Johnson, this value implies a quadrupole deformation ratio beta2n/beta2p = 0.84+/-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.
引用
收藏
页码：909 / 917
页数：9
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