Article

Pionic double charge exchange on 93Nb at low energies 1 Supported by the BMBF (06 TU 886), DFG (Mu 705/3, Graduiertenkolleg), NFR and INTAS RFBR (95-605). 1

  • January 1998
Authors:
J. Pätzold
J. Pätzold
J. Pätzold
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Ralph Bilger at University of Tuebingen
Ralph Bilger
Hyelda Clement at Modibbo Adama University of Technology, Adama
Hyelda Clement
A. Denig at Johannes Gutenberg-Universität Mainz
A. Denig
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Abstract

The reaction 93Nb(π+,π−)93Te has been measured in the energy range Tπ=30–60 MeV at various scattering angles. At all energies the groundstate transition could be observed, whereas the transition to the double isobaric analog state has been identified unambiguously only at Tπ=50 MeV. The groundstate transition exhibits a pronounced resonance-like energy dependence which extends the systematics of this peculiar feature to heavy nuclei. An explanation within the d′ hypothesis is presented.

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