19 research outputs found
Penning-trap mass spectrometry of highly charged, neutron-rich Rb and Sr isotopes in the vicinity of
The neutron-rich mass region around presents challenges for
modeling the astrophysical -process because of rapid shape transitions. We
report on mass measurements using the TITAN Penning trap at TRIUMF-ISAC to
attain more reliable theoretical predictions of -process nucleosynthesis
paths in this region. A new approach using highly charged () ions has
been applied which considerably saves measurement time and preserves accuracy.
New mass measurements of neutron-rich Rb and Sr have
uncertainties of less than 4 keV and show deviations of up to 11 to
previous measurements. An analysis using a parameterized -process model is
performed and shows that mass uncertainties for the A=90 abundance region are
eliminated
Discovery of Yttrium, Zirconium, Niobium, Technetium, and Ruthenium Isotopes
Currently, thirty-four yttrium, thirty-five zirconium, thirty-four niobium,
thirty-five technetium, and thirty-eight ruthenium isotopes have been observed
and the discovery of these isotopes is discussed here. For each isotope a brief
synopsis of the first refereed publication, including the production and
identification method, is presented.Comment: To be published in Atomic Data and Nuclear Data Table
Discovery of Cesium, Lanthanum, Praseodymium and Promethium Isotopes
Currently, forty-one cesium, thirty-five lanthanum, thirty-two praseodymium,
and thirty-one promethium, isotopes have been observed and the discovery of
these isotopes is discussed here. For each isotope a brief synopsis of the
first refereed publication, including the production and identification method,
is presented.Comment: To be published in At. Data. Nucl. Data Table
Bestimmung der Zerfallsenergie neutronenreicher Nuklide der Massenzahl 107 <= A <= 109 mit Beta-Gamma Koinzidenzmessungen
Available from the library of Braunschweig Technische Univ. (DE) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman