Zobrazeno 1 - 10
of 23
pro vyhledávání: '"Surman, Rebecca"'
Autor:
Roederer, Ian U., Vassh, Nicole, Holmbeck, Erika M., Mumpower, Matthew R., Surman, Rebecca, Cowan, John J., Beers, Timothy C., Ezzeddine, Rana, Frebel, Anna, Hansen, Terese T., Placco, Vinicius M., Sakari, Charli M.
Publikováno v:
Science, 382, 1177-1180 (2023)
The heaviest chemical elements are naturally produced by the rapid neutron-capture process (r-process) during neutron star mergers or supernovae. The r-process production of elements heavier than uranium (transuranic nuclei) is poorly understood and
Externí odkaz:
http://arxiv.org/abs/2312.06844
Autor:
Vassh, Nicole, Wang, Xilu, Lariviere, Maude, Sprouse, Trevor, Mumpower, Matthew R., Surman, Rebecca, Liu, Zhenghai, McLaughlin, Gail C., Denissenkov, Pavel, Herwig, Falk
We demonstrate that the well-known 2.6 MeV gamma-ray emission line from thallium-208 could serve as a real-time indicator of astrophysical heavy element production, with both rapid (r) and intermediate (i) neutron capture processes capable of its syn
Externí odkaz:
http://arxiv.org/abs/2311.10895
Publikováno v:
The Astrophysical Journal, 2024, Volume 967, Issue 2, id.146, 20 pp. The Astrophysical Journal, Volume 967, Issue 2, id.146, 20 pp
In high-energy astrophysical processes involving compact objects, such as core-collapse supernovae or binary neutron star mergers, neutrinos play an important role in the synthesis of nuclides. Neutrinos in these environments can experience collectiv
Externí odkaz:
http://arxiv.org/abs/2311.02562
Autor:
Wang, Xilu, Surman, Rebecca
Publikováno v:
In: Tanihata, I., Toki, H., Kajino, T. (eds) Handbook of Nuclear Physics . Springer, Singapore (2023)
This chapter discusses three nucleosynthesis processes involved in producing heavy nuclei beyond the iron group that are influenced or shaped by neutrino interactions: the v process, the vp process and the r process. These processes are all related t
Externí odkaz:
http://arxiv.org/abs/2309.06043
Developments in the description of the masses of atomic nuclei have led to various nuclear mass models that provide predictions for masses across the whole chart of nuclides. These mass models play an important role in understanding the synthesis of
Externí odkaz:
http://arxiv.org/abs/2305.01782
We apply Markov Chain Monte Carlo to predict the masses required to form the observed solar $r$-process rare-earth abundance peak. Given highly distinct astrophysical outflows and nuclear inputs, we find that results are most sensitive to the $r$-pro
Externí odkaz:
http://arxiv.org/abs/2202.09437
Autor:
Wang, Xilu, Clark, Adam M., Ellis, John, Ertel, Adrienne F., Fields, Brian D., Fry, Brian J., Liu, Zhenghai, Miller, Jesse A., Surman, Rebecca
Publikováno v:
The Astrophysical Journal, 2023, Volume 948, Issue 2, id.113, 13 pp
244Pu has recently been discovered in deep-sea deposits spanning the past 10 Myr, a period that includes two 60Fe pulses from nearby supernovae. 244Pu is among the heaviest $r$-process products, and we consider whether it was created in the supernova
Externí odkaz:
http://arxiv.org/abs/2112.09607
Autor:
Wang, Xilu, Clark, Adam M., Ellis, John, Ertel, Adrienne F., Fields, Brian D., Liu, Zhenghai, Miller, Jesse A., Surman, Rebecca
Publikováno v:
The Astrophysical Journal, 2021, Volume 923, Number 2
The astrophysical sites where r-process elements are synthesized remain mysterious: it is clear that neutron star mergers (kilonovae (KNe)) contribute, and some classes of core-collapse supernovae (SNe) are also likely sources of at least the lighter
Externí odkaz:
http://arxiv.org/abs/2105.05178
Autor:
Wang, Xilu, Vassh, Nicole, Sprouse, Trevor, Mumpower, Matthew, Vogt, Ramona, Randrup, Jorgen, Surman, Rebecca
Publikováno v:
The Astrophysical Journal Letters, 2020, Volume 903, Number 1
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:
http://arxiv.org/abs/2008.03335
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:
http://arxiv.org/abs/2006.10905