Structure of N=81144Eu from the decay of144Gd

The structure of¹⁴⁴Eu is investigated through the beta decay of¹⁴⁴Gd, whose decay half-life is measured to be (4.47±0.06) m. A level scheme comprising 67 transitions depopulating 24 excited states is constructed. With the help of the deducedf t values and measured internal conversion coefficients, spin-parity assignments are proposed for several states in¹⁴⁴Eu. This level structure is discussed using the systematics of the odd-A N=81 and N=82 isotones which are investigated by a spherical BCS calculation.