Inconsistency of hexadecapole matrix elements for <sup>180</sup>Hf as extracted from nuclear and leptonic scattering
C F Maguire; J H Hamilton; R Soundranayagam; R B Piercey; J M Finn; W Bertozzi; H Baghaei; C Hyde-Wright; T Buti; C F Maguire; Dept. of Phys. & Astron., Vanderbilt Univ., Nashville, TN, USA; J H Hamilton; Dept. of Phys. & Astron., Vanderbilt Univ., Nashville, TN, USA; R Soundranayagam; Dept. of Phys. & Astron., Vanderbilt Univ., Nashville, TN, USA; R B Piercey; Dept. of Phys. & Astron., Vanderbilt Univ., Nashville, TN, USA; J M Finn; Dept. of Phys. & Astron., Vanderbilt Univ., Nashville, TN, USA; W Bertozzi; Dept. of Phys. & Astron., Vanderbilt Univ., Nashville, TN, USA; H Baghaei; Dept. of Phys. & Astron., Vanderbilt Univ., Nashville, TN, USA; C Hyde-Wright; Dept. of Phys. & Astron., Vanderbilt Univ., Nashville, TN, USA; T Buti; Dept. of Phys. & Astron., Vanderbilt Univ., Nashville, TN, USA
Журнал:
Journal of Physics G: Nuclear Physics
Дата:
1988-10-01
Аннотация:
Electron scattering on a highly enriched <sup>180</sup>Hf target has been carried out at the Bates Linear Accelerator Center. Elastic and inelastic cross sections were measured at lab energies of 115, 130, 160, 240 and 280 MeV incident energy. Excitation of the 0<sup>+</sup>, 2<sup>+</sup>, 4<sup>+</sup> ground-state rotational band members and 1.181(2<sup>+</sup>'), 1.386(3<sup>-</sup>), 1.621(5<sup>-</sup>), 1.693(2<sup>+</sup>") and 1.890 MeV(3<sup>-</sup>') states were observed. The analysis of the ground-band data yielded values of the transition matrix elements, M<sub>02</sub> and M<sub>04</sub>, of 2.29(1) eb and 0.128(5) eb<sup>2</sup>, respectively. The M<sub>04</sub> value is inconsistent with the large negative value (-0.67 eb<sup>2</sup>) obtained from ( alpha , alpha ') sub-Coulomb and Coulomb-nuclear interference studies of <sup>180</sup>Hf. Possible origins of this difference are presented.
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