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

Abstract

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.

DOI: http://dx.doi.org/10.1103/PhysRevC.26.500

  • 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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