Strong population of excited 0+ states in even Zr isotopes observed with the (C14, O16) reaction

Phys. Rev. C 26, 500 – Published 1 August 1982
Wolfgang Mayer, D. Pereira, K. E. Rehm, H. J. Scheerer, H. J. Körner, G. Korschinek, Waltraud Mayer, P. Sperr, Steven C. Pieper, and R. D. Lawson


The two-proton pickup reaction (C14, O16) on the even Mo isotopes was investigated at Elab=71 MeV. It was found that the ratio of the ground and first excite O+ state cross sections changes dramatically as neutrons are added to the N=50 shell. While the reaction Mo92(C14, O16)Zr90 populates the ground state three times more strongly than the first excited O+ state, for the heaviest isotope Zr98, the excited O+ state has twice the population of the ground state. Attempts to explain the cross section ratios by means of distorted-wave Born approximation calculations, based on a complete Brody-Moshinsky decomposition of the two-proton cluster and spherical shell model wave functions, were not successful.

NUCLEAR REACTIONS Mo92,100(C14, C14)Mo92,100, Elab=71 MeV; measured σ(θ); elastic and inelastic scattering; Mo92,94,96,98,100(C14, O16)Zr90,92,94,96,98 reactions; optical model, DWBA calculations.


  • Received 15 March 1982
  • Published in the issue dated August 1982

© 1982 The American Physical Society

Authors & Affiliations

Wolfgang Mayer, D. Pereira*, K. E. Rehm, H. J. Scheerer, H. J. Körner, G. Korschinek, Waltraud Mayer, and P. Sperr

  • Physik Department, Technische Universität München, D-8046 Garching, West Germany

Steven C. Pieper and R. D. Lawson

  • Argonne National Laboratory, Argonne, Illinois 60439

  • *On leave of absence from Pelletron Laboratory, Sao Paulo University, Brazil.
  • Present address: Argonne National Laboratory, Argonne, Illinois 60439.

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