Measurement of the147Gd mass excess by the (12C,9Be) reaction

The mass excess of the147Gd nucleus was measured from the144Sm(12C,9Be)147Gd reaction using the 72 MeV12C beam of the Orsay MP Tandem and the “Bacchus” magnetic spectrometer. The measurement is auto-calibrated by the10Be spectrum from the144Sm(12C,10Be) reaction. The derived value of the mass excess of147Gd is −75.401±0.025 MeV. It is compared with other recent results and with calculated values.