Establishment of M1 multipolarity of a 6.5 mu_N^2 resonance in 172-Yb at E_gamma=3.3 MeV

A. Schiller; A. Voinov; E. Algin; J.A. Becker; J. Rekstad; L.A. Bernstein; M. Guttormsen; P.E. Garrett; R.O. Nelson; S. Siem

arxiv: nucl-ex/0401038 · v1 · submitted 2004-01-27 · ⚛️ nucl-ex

Establishment of M1 multipolarity of a 6.5 mu_N² resonance in 172-Yb at E_gamma=3.3 MeV

A. Schiller , A. Voinov , E. Algin , J.A. Becker , L.A. Bernstein , P.E. Garrett , M. Guttormsen , R.O. Nelson

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J. Rekstad S. Siem

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keywords gammamultipolarityresonancealphabeencalculationscapturecompared

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Two-step-cascade spectra in 172-Yb have been measured after thermal neutron capture. They are compared to calculations based on experimental values of the level density and radiative strength function (RSF) obtained from the 173-Yb(3-He,alpha gamma)172-Yb reaction. The multipolarity of a 6.5(15) mu_N^2 resonance at E_gamma=3.3(1) MeV in the RSF is determined to be M1 by this comparison.

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Establishment of M1 multipolarity of a 6.5 mu_N² resonance in 172-Yb at E_gamma=3.3 MeV

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