Article,

Dipole excitations in Te-122, Te-126 and Te-130

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ZEITSCHRIFT FUR PHYSIK A-HADRONS AND NUCLEI, 358 (2): 197-198 (1997)International Conference on Nuclear Structure Around the Turn of the Century, AGHIA PELAGHIA, GREECE, JUN 30-JUL 06, 1996.
DOI: 10.1007/s002180050306

Abstract

Excited states of the nuclei Te-122, Te-126 and Te-130 were populated via the (gamma, gamma') reaction at endpoint energies of the bremsstrahlung between 4.5 and 5.5 MeV. Gamma rays were detected with a EUROBALL-CLUSTER detector and a single detector. In all nuclei several dipole transitions were identified at energies around 3 MeV. The lowest corresponding J = 1 states are interpreted as two-phonon excitations. Quasiparticle-phonon-model calculations predict one 1(-) state arising from the coupling of the first quadrupole and the first octupole phonon and one 1(+) state arising from the coupling of the first: and the isovector second quadrupole phonon at about 3 MeV. The calculated transition strengths are compatible with experimental ones.

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