Elsevier

Nuclear Physics A

Volume 406, Issue 3, 26 September 1983, Pages 519-532
Nuclear Physics A

Low-lying levels, γ-ray transitions, and vibrational structure in 198Pt from (n, n'γ) reaction spectroscopy

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Abstract

Low-lying states in 198Pt have been studied by (n, n'γ) reaction spectroscopy at incident neutron energies below 2.5 MeV. Using detailed γ-ray excitation functions and angular distribution measurements, we have established a level scheme which includes 16 excited levels and is believed to include all levels below an excitation energy of 1.5 MeV. The positive-parity structure is similar to that expected for an anharmonic vibrator; however, difficulties in asserting that the first 0+ excited level is a collective excitation are encountered. Only two negative-parity states are observed, and they are adequately described in the semi-decoupled model.

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    Present address: Bell Laboratories, Allentown, Pennsylvania 18103.

    ††

    Present address: Physics Department, Yarmouk University, Irbid, Jordan.

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