Mass is one of the most fundamental properties that can be obtained about an atomic nucleus. By precise control and manipulation of the movements of the particles in a Penning trap the precision mass data can be obtained. Generally speaking, more accurate and precise mass data are needed to study more fundamental physical problems. A mass resolution of about 0.1 ppm is needed for the studies of such as testing mass formulas and nuclear theories, and a resolution of better than 0.1 ppb should be satisfied for studying the fundamental constants.
To perform successfully high precision mass measurement we must manipulate the ions/atoms in very carefully ways by all available methods, such as static/radiofrequence electric field, magnetic field, buffer gas cooling, cryogenic gas cell and so on. The ions must act as we desired.
For some details, the following links can help you to understand our recent works performed in our laboratory: