TY  - GEN
KW  - Penningfalle
KW  -  Kernstruktur
KW  -  Präzisionsspannungsquelle
ID  - heidok18106
Y1  - 2015///
A1  - Böhm, Christine
N2  - Atomic masses and hence binding energies of nuclides are of great importance for studies of nuclear structure since they reflect all effective interactions in a nucleus.
Within this thesis the masses of seven nuclides, namely 194Au, 194Hg, 190,193,198Tl and 202,208Pb, were determined at the Penning-trap mass spectrometer ISOLTRAP at ISOLDE/CERN.
The thallium region in the chart of isotopes is of special interest due to the occurrence of nuclear structure effects like low-lying isomers, level inversion, shape coexistence
and deformations. These effects are investigated by applying finite-difference mass formulas, such as the two-neutron separation energies or the so-called empirical
pairing gaps. The second topic addressed within the present thesis is an ultra-stable voltage source, called StaReP (Stable Reference for Penning Trap Experiments),
which was developed at the Max-Planck-Institut für Kernphysik. It is one of the
key components of the high-precision mass spectrometer PENTATRAP, containing a tower of five Penning traps. A 25-channel voltage source with a relative stability
of few 10^?8 over a period of 10 minutes in the range of 0 to ?100V is mandatory for PENTATRAP aiming for mass measurements with relative mass uncertainties
of ? 10^?11. Mass values with such a high precision allow for stringent tests of quantum electrodynamics in strong electric fields, testing Einstein?s mass-energy relation
E = mc^2 as well as measurements of decay energies (Q-values) with applications in neutrino physics.
UR  - https://archiv.ub.uni-heidelberg.de/volltextserver/18106/
AV  - public
TI  - High-precision mass measurements of neutron-deficient Tl isotopes at ISOLTRAP and the development of an ultra-stable voltage source for the PENTATRAP experiment
ER  -