Nuclear structure studies in the xenon and radon region and the discovery of a new radon isotope by Penning trap mass spectrometry [Elektronische Ressource] / von Dennis Neidherr

Nuclear structure studies inthe xenon and radon regionand the discovery of a new radon isotopeby Penning trap mass spectrometryDissertation zur Erlangung des GradesDoktor der Naturwissenschaftenam Fachbereich 08: Physik, Mathematik und Informatikder Johannes Gutenberg-Universit˜at MainzVon Dennis Neidherrgeb. in Frankfurt am MainMainz 2010Betreuer und erster Gutachter:Zweiter Gutachter:Tag der Promotion: 28. 04. 2010Nuclearstructurestudiesinthexenonandradonregionandthediscoveryofanewradon isotope by Penning trap mass spectrometry:Nowadays high-precision mass measurements based on Penning traps allow a deep insightinto the fundamental properties of nucleonic matter. To this end, the cyclotron frequency” =qB=(2…m) of an ion conflned in a strong, homogeneous magnetic fleld B is determined. Atcthe ISOLTRAP mass spectrometer at ISOLDE / CERN the masses of short-lived radioactivenuclei with half-lives down to several ten ms can be measured with an uncertainty in the order¡8of 10 and below. ISOLTRAP consists of an RFQ cooler and buncher to cool and accumulatethe ions coming from ISOLDE and a double Penning trap system to flrst clean the ion samplesandflnallyperformthemassmeasurements. Withinthisthesisthemassesofneutronrichxenon138¡146 223¡229and radon isotopes, namely Xe and Rn were determined, eleven of them for the229flrst time. Rn was even discovered in this experiment and its half-life could be determined to+1:212 s.