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Electric monopole transitions and excited 0+ states in Cf250

Phys. Rev. C 19, 1140(R) – Published 1 March 1979
Irshad Ahmad and Richard R. Chasman


E0 transitions identified in Cf250 establish two excited 0+ states at 1154.2 and 1266.5 keV with dimensionless ratios X of 0.27 ± 0.03 and 2.5 ± 0.3, respectively. This is the heaviest nucleus in which excited 0+ states have been observed. Using density-dependent pairing matrix elements and appropriate single-particle energies we have calculated the energies of seniority 0 Kπ=0+ excited states to be 1310 and 1620 keV and the energy of the lowest s=2 0+ state as 1430 keV. These calculations suggest that the 1154.2 keV state is probably the lowest pair vibration and the 1266.5 keV state is possibly the lowest s=2 0+ state.

RADIOACTIVITY Es250 [from Cf249(d,n)]; measured Eγ, Iγ, Ece, Ice. Cf250 deduced levels, logft (EC), γ multipolarity, I, π, Two excited 0+ states. Mass-separated Es250.

DOI: http://dx.doi.org/10.1103/PhysRevC.19.1140

  • Received 6 November 1978
  • Published in the issue dated March 1979

© 1979 The American Physical Society

Authors & Affiliations

Irshad Ahmad and Richard R. Chasman

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

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