Nuclear structure of 156Gd studied with (n, γ), (n, e−), (d, p), (d, t) reactions and lifetime measurements

Abstract The nucleus 156 Gd was studied with (n, γ) and (n, e − ) reactions at the Institut Laue-Langevin (ILL) in Grenoble. The (d, t) and (d, p) reactions were investigated at the Munich Tandem Accelerator. Primary gamma rays following average resonance capture were observed at the Institut for Nuclear Research in Kiev. Summed coincidences measurements were carried out at the Reactor IBR-30 in Dubna. An extensive level scheme was constructed up to 2.35 MeV including 413 transitions and 18 band assignments. Lifetimes of 16 selected levels were measured with the Gamma-Ray Induced Doppler broadening method at the ILL. Low-lying bands of positive and negative parity were interpreted in the framework of the spdf-IBA. The agreement was found to be quite good.