Abstract
Using in-beam technique, gamma radiation from excited levels in the even Xe isotopes A = 124, 126, 128, 130 and 132 has been studied. The nuclei are produced in (α, 2n) reactions on enriched Te targets at a bombarding energy of about 28 MeV. From intensity and angular distribution measurements, members of the collective bands having spin and parity of up to 8 + or 10 + are assigned. On the basis of their angular distributions, a few dipole transitions are classified. These are tentatively interpreted as depopulating odd-parity two-quasi-particle neutron states. Indications of a new isomeric state in 130Xe are found. Because of the gamma intensities observed, the transition order is changed in the decay of the earlier known 8.4 ms isomeric state in 132Xe. Preliminary results from similar experiments on Te isotopes using Sn (α, 2n)Te reactions are also reported.
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