High Precision Mass Measurements of Intermediate-mass Neutron-deficient Nuclei via MRTOF-MS

International audiencePrecision mass measurements of ^63Cu, ^64–66Zn, ^65–67Ga, ^65–67Ge, ^67As, ^79,81Br, ^79Kr, ^80,81Rb, and ^79,80Sr were performed with a multireflection time-of-flight mass spectrograph. The masses of these nuclides were determined by the single reference method using isobaric references. In order to obtain precise results, time-of-flight drift compensations were performed and a phenomenological fit function was employed. Consequently, in the case of ^65Ga, a mass uncertainty of 2.1 keV, corresponding to a relative precision of \(\delta m/m = 3.5 \times 10^{ - 8}\), was obtained and the mass value is in excellent agreement with the 2016 Atomic Mass Evaluation