Zobrazeno 1 - 10
of 31
pro vyhledávání: '"Nicole Vassh"'
Autor:
Matthew R. Mumpower, Trevor M. Sprouse, Jonah M. Miller, Kelsey A. Lund, Jonathan Cabrera Garcia, Nicole Vassh, Gail C. McLaughlin, Rebecca Surman
Publikováno v:
The Astrophysical Journal, Vol 970, Iss 2, p 173 (2024)
The simulation of heavy element nucleosynthesis requires input from yet-to-be-measured nuclear properties. The uncertainty in the values of these off-stability nuclear properties propagates to uncertainties in the predictions of elemental and isotopi
Externí odkaz:
https://doaj.org/article/ad94ab32915c4c98b5a53518f07ab313
Publikováno v:
Frontiers in Physics, Vol 10 (2022)
In recent work, we developed a Markov Chain Monte Carlo (MCMC) procedure to predict the ground state masses capable of forming the observed Solar r-process rare-earth abundance peak. By applying this method to nucleosynthesis calculations which make
Externí odkaz:
https://doaj.org/article/958ad62fca9f42ed903d132a8893b96e
Autor:
Maria Lugaro, Andrés Yagüe López, Benjámin Soós, Benoit Côté, Mária Pető, Nicole Vassh, Benjamin Wehmeyer, Marco Pignatari
Publikováno v:
Universe, Vol 8, Iss 7, p 343 (2022)
We investigate the origin in the early Solar System of the short-lived radionuclide 244Pu (with a half life of 80 Myr) produced by the rapid (r) neutron-capture process. We consider two large sets of r-process nucleosynthesis models and analyse if th
Externí odkaz:
https://doaj.org/article/30e6148ab8e241d89a54c2291d601da7
Autor:
Iris Dillmann, Oliver Kester, Richard Baartman, Alan Chen, Tobias Junginger, Falk Herwig, Dobrin Kaltchev, Annika Lennarz, Thomas Planche, Chris Ruiz, Nicole Vassh
Publikováno v:
The European Physical Journal A. 59
Measuring neutron capture cross sections of radioactive nuclei is a crucial step towards a better understanding of the origin of the elements heavier than iron. For decades, the precise measurement of direct neutron capture cross sections in the “s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0956dec97065d3cc89eb1c804e63aa0f
https://doi.org/10.1140/epja/s10050-023-01012-9
https://doi.org/10.1140/epja/s10050-023-01012-9
Autor:
Ian U. Roederer, John J. Cowan, Marco Pignatari, Timothy C. Beers, Elizabeth A. Den Hartog, Rana Ezzeddine, Anna Frebel, Terese T. Hansen, Erika M. Holmbeck, Matthew R. Mumpower, Vinicius M. Placco, Charli M. Sakari, Rebecca Surman, Nicole Vassh
We present new observational benchmarks of rapid neutron-capture process (r-process) nucleosynthesis for elements at and between the first (A ~ 80) and second (A ~ 130) peaks. Our analysis is based on archival ultraviolet and optical spectroscopy of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d569ad7dd4a05bbad140851fb27f74d1
http://arxiv.org/abs/2210.15105
http://arxiv.org/abs/2210.15105
Autor:
Nicole Vassh, Francis Timmes
Publikováno v:
Vol. 52, Issue 2. 52
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e3828be3d3b21d2ca6dddc6b54305bc4
https://doi.org/10.3847/25c2cfeb.082fb169
https://doi.org/10.3847/25c2cfeb.082fb169
Autor:
Rebecca Surman, Nicole Vassh, Matthew Mumpower, Kelsey Lund, Gail C. McLaughlin, Jennifer Barnes, Trevor M. Sprouse, Yonglin Zhu
The mergers of binary neutron stars, as well as black hole-neutron star systems, are expected to produce an electromagnetic counterpart that can be analyzed to infer the element synthesis that occurred in these events. We investigate one source of un
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bdf4f7f6c40b4d5a57d5052c0dc45434
Autor:
Nicole Vassh, Matthew Mumpower, Brian D. Fields, Trevor M. Sprouse, Rebecca Surman, Xilu Wang
Neutron star mergers (NSMs) are rapid neutron capture (r-process) nucleosynthesis sites, which eject materials at high velocities, from 0.1c to as high as 0.6c. Thus the r-process nuclei ejected from a NSM event are sufficiently energetic to initiate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::50e266e4d0baec7438917bb4d6fe3a4f
Autor:
Jørgen Randrup, Matthew Mumpower, Ramona Vogt, Rebecca Surman, Trevor M. Sprouse, Xilu Wang, Nicole Vassh
Neutron star mergers (NSMs) are the first verified sites of rapid neutron capture (r-process) nucleosynthesis, and could emit gamma rays from the radioactive isotopes synthesized in the neutron-rich ejecta. These MeV gamma rays may provide a unique a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1bd717461ce79fc4fb295cdc6a2c7bfd
Publikováno v:
EPJ Web of Conferences, Vol 242, p 04002 (2020)
We review recent work examining the influence of fission in rapid neutron capture ($r$-process) nucleosynthesis which can take place in astrophysical environments. We briefly discuss the impact of uncertain fission barriers and fission rates on the p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ee5d2c283dd4c27a5b28f877cec2fccb