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@PHDTHESIS{Slavkovska:218413,
author = {Slavkovska, Zusana},
title = {{T}he $^{124}${X}e(p,g)$^{125}${C}s {R}eaction {M}easured
in {I}nverse {K}inematics at a {S}torage {R}ing},
school = {Johann Wolfgang Goethe-Universität Frankfurt},
type = {Dissertation},
address = {Frankfurt am Main},
publisher = {Universitätsbibliothek Johann Christian Senckenberg},
reportid = {GSI-2019-00391},
pages = {129 S.},
year = {2018},
note = {Dissertation, Johann Wolfgang Goethe-Universität Frankfurt
, 2018},
abstract = {This thesis presents the rst measurement of the proton
capture reaction on the isotope124Xe performed in inverse
kinematics. The experiment was carried out in June 2016 at
theExperimental Storage Ring (ESR) at the GSI Helmholtz
Centre for Heavy Ion Researchin Darmstadt, Germany.124Xe is
one of about 35 p-nuclei that cannot be produced via
neutron-induced nucleosynthesisas the vast majority of heavy
elements. Its production and destruction provideimportant
information about the nucleosynthesis of the p-nuclei.
Measuring the124Xe(p,)125Cs reaction also gives strong
constraints for its reverse 125Cs(,p)124Xe reaction.Fully
stripped 124Xe ions repeatedly passed a H2 gas jet target at
ve dierent energiesbetween 5.5MeV/u and 8MeV/u. An electron
cooler compensated for the energy lossin the target and
reduced the beam momentum spread. The reaction product
125Cs55+has a smaller magnetic rigidity than 124Xe54+.
Therefore 125Cs55+ was deected towardssmaller radii in the
rst dipole after the target area and thereby separated from
124Xe54+.It was detected with a position-sensitive
Double-Sided Silicon Strip Detector (DSSSD).The novelty of
this experiment was the installation of the DSSSD inside the
ultra-highvacuum of the storage ring using a newly designed
manipulator.Three High-Purity Germanium X-ray detectors were
used to measure the X-rays followingthe Radiative Electron
Capture (REC) events into 124Xe53+. The REC cross sections
arewell-known and were used to determine the luminosity.The
124Xe(p,)125Cs cross sections at ion beam energies between
5.5MeV/u and 8MeV/uwere determined relatively to the K-REC
cross sections and nally compared to the
theoreticallypredicted cross sections. While theoretical
predictions of the TENDL databaseare lower than the measured
ones by a factor of up to seven, the NON-SMOKER dataare
higher by a factor of up to two, except of the cross section
at 7MeV/u, where NONSMOKERdata are slightly lower than the
experimental value.For the rst time, a proton capture cross
section could be measured in inverse kinematicsclose to the
astrophysically relevant Gamow window. This allows the
direct determinationof the (p,) cross section of isotopes
with half-lives down to several minutes, which is
notpossible with any other technique.},
cin = {ATP},
cid = {I:(DE-Ds200)ATP-20051214OR020},
pnm = {6211 - Extreme States of Matter: From Cold Ions to Hot
Plasmas (POF3-621)},
pid = {G:(DE-HGF)POF3-6211},
typ = {PUB:(DE-HGF)11},
urn = {urn:nbn:de:hebis:30:3-485516},
url = {https://repository.gsi.de/record/218413},
}