Particle-phonon interactions in Cf248 and Cf249

Phys. Rev. C 12, 442 – Published 1 August 1975
S. W. Yates, R. R. Chasman, A. M. Friedman, I. Ahmad, and K. Katori

Abstract

The extent of particle-photon mixing in Cf248 and Cf249 has been determined using the Cf249(d, t) and Cf249(d, d) reactions. Kπ=2- bands were identified at 593 and 1477 keV in Cf248. Since the only Kπ=2- neutron two quasiparticle configuration expected below 2 MeV in Cf248 is {92-[734]; 52+[622]}2-, the second Kπ=2- band is considered to be predominantly of phonon character. In Cf249 a Kπ=52+ band at 145 keV, known from decay scheme studies, receives a measurable population in the (d, d) reaction. The phonon admixture in the 52+ state which results from the {92-[734] 2- phonon} configuration was determined to be (29±5)%. The collective admixture in the 52+ state was also calculated from an octupole particle-hole interaction and was found to be 35%, in good agreement with the experimental value. The anomalously low energy of the 52+ state could not be entirely reproduced by this calculation.

NUCLEAR REACTIONS Cf249(d, d), Ed=15 MeV; Cf249(d, t), Ed=12 MeV; measured σ(θ). Cf248, Cf249 deduced levels, J, π, extracted phonon contributions. Enriched target. Calculated particle-phonon mixing.

DOI: http://dx.doi.org/10.1103/PhysRevC.12.442

  • Received 14 May 1975
  • Published in the issue dated August 1975

© 1975 The American Physical Society

Authors & Affiliations

S. W. Yates, R. R. Chasman, A. M. Friedman, I. Ahmad, and K. Katori*

  • Chemistry Division, Argonne National Laboratory, Argonne, Illinois 60439

  • *Present address: Tokyo University of Education, Tokyo, Japan.

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