Heidelberg 2015 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 49: Invited Talks 4

HK 49.3: Hauptvortrag

Donnerstag, 26. März 2015, 12:20–13:00, T/HS1

Precision mass measurements of rare isotopes in nuclear physics — •Jens Dilling — TRIUMF, Vancouver, Canada & University of British Columbia

From our current knowledge, we expect that there are up to 8000 different isotopes in the universe, out of those, 288 isotopes are stable or very long lived; the other isotopes are short-lived rare isotopes. At world-wide facilities, we have so far investigated about 3000 isotopes, to the extent that we know basic properties, like decay-modes, half-lives, or mass. The mass plays a particular important role, as it gives access to the binding energy and hence the underlying forces that hold the protons and neutrons together. The rare isotopes are produced at accelerator facilities, often only in minuscule quantities, and with half-lives as short as few milliseconds, hence the name rare. To overcome the research obstacles of rare isotopes and extract information about the atoms and their fundamental interactions dedicated instruments are required. We have developed very sensitive and fast methods using ion trap techniques at TITAN (TRIUMF's Ion Trap of Atomic and Nuclear science). Ion traps can be employed to measure atomic masses, using one single ion in as short as a 1/100 of a second with 10 parts per billion precision. One example is to probe into the world of so-called nuclear halos. Teetering on the edge of stability, the properties of halo nuclei have long been recognized as the most stringent test parameters of our understanding of the strong force. In this talk I will report on these measurements and new investigations of very extreme rare isotopes.