Dresden 2011 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MS: Fachverband Massenspektrometrie
MS 4: Precision Mass Spectrometry and Fundamental Applications
MS 4.2: Hauptvortrag
Dienstag, 15. März 2011, 11:00–11:30, GÖR 229
High-precision Penning trap mass spectrometry for neutrino physics — •sergey eliseev1, christine böhm1,2, klaus blaum1,2, andreas dörr2, mikhail goncharov1, yuri novikov3, julia repp1,2, and christian roux1,2 — 1Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany — 2Physikalisches Institut, Ruprecht-Karls-Universität, 69120 Heidelberg, Germany — 3PNPI, Gatchina, 188300 St. Petersburg, Russia
The discovery of neutrino oscillations has proven neutrinos are massive particles. However, this does not provide information on the type of the neutrino and its mass. An answer to these questions lies in a study of beta transitions, i.e., β−, double β−, EC and double EC decays. A crucial parameter in this study is the Q-value of the beta transitions, which has to be measured with an accuracy of 100 eV in the case of the determination of the neutrino type to better than 1 eV if the neutrino mass is concerned.
Tremendous progress in Penning traps finally allowed such high precision Q-value measurements. JYFLTRAP/Finland and SHIPTRAP/Germany, e.g., contribute to the search for neutrinoless double β transitions. In the sector of experiments for a determination of the neutrino mass two Penning trap mass spectrometers are being developed at Max-Planck Institut für Kernphysik/Germany. THe-TRAP is devoted to a measurement of the Q-value of Tritium beta decay for the KATRIN experiment, whereas PENTATRAP aims for a measurement of the Q-values of EC in 163Ho and of β−-decay of 187Re with accuracies of much below 10−11.