Elsevier

Nuclear Physics A

Volume 110, Issue 3, 29 March 1968, Pages 674-694
Nuclear Physics A

Decay of the 55 min and 12 min 133Te isomers

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Abstract

Gamma rays emitted in the decay of the 133Te isomers, 55.4 min 133mTe and 12.5 min133gTe, have been observed with Ge(Li) detectors. Sources were prepared by separating Sb from fission products, allowing several minutes for decay of 2.7 min 133Sb and then separating the Te daughter activities. A total of 29 γ-rays between 312 and 2541 keV were attributed to decay of 133gTe and 30 from 74 to 2050 keV to that of 133mTe. Gamma-gamma coincidences in the decay of 133gTe were observed with a NaI(Tl)single bondGe(Li) set-up. The decay scheme of 133gTe was constructed, involving placement of 25 of the γ-rays emitted. The decay of 133gTe populates levels in 133I at 0, 312, 720, 787, 1313, 1333, 1374, 1565, 1718, 2137, 2194 and 2541 keV. The decay of 133mTe is very complicated, and we have not attempted construction of a complete decay scheme for it; however, levels at 913 and 1561 keV in 133I are definitely populated in 133mTe decay. The value for Qβ of 133Te was measured as 3.52±0.10 MeV. The low-lying levels of the odd-mass iodine isotopes vary smoothly through the series 125I through 133I. The levels of 133I are fitted rather well by predictions based on quasi-particle-phonon coupling.

References (33)

  • BerzinsG. et al.

    Nucl. Phys.

    (1967)
  • BeyerL.M. et al.

    Nucl. Phys.

    (1967)
  • AubleR.L. et al.

    Nucl. Phys.

    (1965)
  • FarrarH. et al.

    Nucl. Phys.

    (1962)
  • BemisC.E. et al.

    J. Inorg. Nucl. Chem.

    (1964)
  • BemisC.E. et al.

    Nucl. Instr.

    (1965)
  • MenonM.P. et al.

    J. Inorg. Nucl. Chem.

    (1965)
  • RagainiR.C. et al.

    Nucl. Phys.

    (1967)
  • FranssonK. et al.

    Nucl. Phys.

    (1966)
  • HamiltonJ.H. et al.

    Nucl. Phys.

    (1965)
  • PramilaG.C. et al.

    Nucl. Phys.

    (1965)
  • EichlerE.

    Revs. Mod. Phys.

    (1964)
  • WaltersW.B. et al.

    Phys. Rev.

    (1965)
  • GeigerJ.S.

    Phys. Rev.

    (1967)
  • PappasA.C.

    U.S. Atomic Energy Commission Report AECU-2806

    (1953)
  • AlvägerT. et al.

    Ark. Fys.

    (1957)
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    Present address: Tehran University Nuclear Centre, Tehran, Iran.

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