Eur. Phys. J. A (2000) 8: 157-160
https://doi.org/10.1007/s100530050021

Short Note

New states and γ-transitions in ²⁰⁹Bi observed in the (³He, d*γγ)-subcoulomb-reaction

Institut für Kernphysik, Universität zu Köln, Zülpicher Str. 77, 50937, Köln, Deutschland

Received: 18 May 2000
Published online: 15 June 2000

Abstract

Single-particle states as well as collective states in the natural Bismuth isotope ²⁰⁹Bi were investigatedusing two Euroball Cluster detectors at the Cologne FN-tandem accelerator. The states were populated by the subcoulomb proton stripping reaction ²⁰⁸Pb(³He,d*γγ)²⁰⁹Bi at 20.5 MeV beam-energy. Forty-eight γ-transitions and 33 levels were observedfor the first time. Gamma-transitions up to an energy of 6.0 MeV were detected. The energy of the observed states were determined to an accuracy of about 0.3 keV.