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Isobaric analogue resonances; proton elastic scattering on⁷⁰Ge; levels in⁷¹As; spectroscopic factor; intermediate structure

The analogues of the low-lying levels in⁷¹Ge have been observed as resonances in the compound nucleus⁷¹As through proton elastic scattering on⁷⁰Ge in the energy rangeE_p=3.5 to 5.3 MeV. The excitation functions cover the analogue resonances corresponding to states upto 2.3 MeV excitation in⁷¹Ge. The sub-structures in the 5.06 MeV resonance, first observed by Temmer and co-workers have been confirmed in the present experiment. The present investigation reveals similar sub-structures in the 4.13 MeV resonance lending further support to the existence of intermediate structure near an isobaric analogue resonance. The resonance parameters and the spectroscopic factors (for the corresponding parent states) have been extracted. The results are compared with the information available from the⁷⁰Ge(d, p)⁷¹Ge reaction.

C R Ramaswamy¹ N G Puttaswamy¹ M G Betigeri^{1 2}

1. Department of Physics, Bangalore University, Bangalore - 560 001
2. Nuclear Physics Division, Bhabha Atomic Research Centre, Bombay - 400 085

Published

June 1979

Manuscript received

26 September 1978

Manuscript revised

11 April 1979