128 citations · 294 across the 7 of their papers we have counts for
7 papers
Radioactive nuclei from cosmochronology to habitability
M. Lugaro, U. Ott, Á. Kereszturi
In addition to long-lived radioactive nuclei like U and Th isotopes, which have been used to measure the age of the Galaxy, also radioactive nuclei with half-lives between 0.1 and…
Origin of the p-process radionuclides 92Nb and 146Sm in the early Solar System and inferences on the birth of the Sun
Maria Lugaro, Marco Pignatari, Ulrich Ott +4
The abundances of 92Nb and 146Sm in the early Solar System are determined from meteoritic analysis and their stellar production is attributed to the p process. We investigate if th…
Stellar origin of the 182Hf cosmochronometer and the presolar history of solar system matter
Maria Lugaro, Alexander Heger, Dean Osrin +7
Among the short-lived radioactive nuclei inferred to be present in the early solar system via meteoritic analyses, there are several heavier than iron whose stellar origin has been…
Origin of Anomalous Xe-H in Nanodiamond Stardust
K. -L. Kratz, K. Farouqi, O. Hallmann +2
Still today, the nucleosynthesis origin of Xe-H in presolar nanodiamonds is far from understood. Historically, possible explanations were proposed by a secondary "neutron-burst" pr…
Origin of anomalous Xe-H in presolar diamonds: Indications of a "cold" r-process
Karl-Ludwig Kratz, Khalil Farouqi, Ulrich Ott
We report on a concerted effort aimed at understanding the nucleosynthesis origin of Xe-H in presolar nanodiamonds. Previously explored possible explanations have included a second…
New attempts to understand nanodiamond stardust
Ulrich Ott, Astrid Besmehn, Khalil Farouqi +5
We report on a concerted effort aimed at understanding the origin and history of the pre-solar nanodiamonds in meteorites including the astrophysical sources of the observed isotop…
He and Ne ages of large presolar silicon carbide grains: Solving the recoil problem
U. Ott, P. R. Heck, F. Gyngard +4
Knowledge about the age of presolar grains provides important insights into Galactic chemical evolution and the dynamics of grain formation and destruction processes in the Galaxy.…