Results 91 to 100 of about 21,814 (256)

Challenges and Requirements in High-Precision Nuclear Astrophysics Experiments

Universe, 2022
In the 21th century astronomical observations, as well as astrophysical models, have become impressively precise. For a better understanding of the processes in stellar interiors, the nuclear physics of astrophysical relevance—known as nuclear ...
György Gyürky
doaj   +1 more source

The evolution and history of Vinca alkaloids: From the Big Bang to the treatment of pediatric acute leukemia

Pediatric Blood &Cancer, Volume 71, Issue 11, November 2024.
Abstract An attractive flower from the island of Madagascar has in part saved the lives of thousands of children with acute lymphoblastic leukemia (ALL). Random mutations and alterations to the genome led to the evolution of genes encoding enzymes, which would provide the periwinkle flower an arsenal of secondary metabolites to survive within the ...
Jeffrey W. Taub, Steven A. Buck, Ana C. Xavier, Holly Edwards, Larry H. Matherly, Yubin Ge   +5 more
wiley   +1 more source

Nucleosynthesis in the Innermost Ejecta of Neutrino-driven Supernova Explosions in Two Dimensions [PDF]

, 2017
We examine nucleosynthesis in the innermost neutrino-processed ejecta (a few ) of self-consistent two-dimensional explosion models of core-collapse supernovae (CCSNe) for six progenitor stars with different initial masses.
S. Wanajo, B. Müller, H. Janka, A. Heger   +3 more
semanticscholar   +1 more source

Abundance Ratios in GALAH DR2 and Their Implications for Nucleosynthesis [PDF]

Astrophysical Journal, 2019
Using a sample of 70,924 stars from the second data release of the GALAH optical spectroscopic survey, we construct median sequences of [X/Mg] versus [Mg/H] for 21 elements, separating the high-α/“low-Ia” and low-α/“high-Ia” stellar populations through ...
Emily J. Griffith, Jennifer A. Johnson, D. Weinberg   +2 more
semanticscholar   +1 more source

Theoretical Predictions of Surface Light Element Abundances in Protostellar and Pre-Main Sequence Phase

Frontiers in Astronomy and Space Sciences, 2021
Theoretical prediction of surface stellar abundances of light elements–lithium, beryllium, and boron–represents one of the most interesting open problems in astrophysics.
E. Tognelli, E. Tognelli, S. Degl’Innocenti, S. Degl’Innocenti, P. G. Prada Moroni, P. G. Prada Moroni, L. Lamia, L. Lamia, L. Lamia, R. G. Pizzone, A. Tumino, A. Tumino, C. Spitaleri, C. Spitaleri, A. Chiavassa   +14 more
doaj   +1 more source

Dark sector equilibration during nucleosynthesis [PDF]

Physical Review D, 2019
Light, weakly coupled dark sectors may be naturally decoupled in the early Universe and enter equilibrium with the Standard Model bath during the epoch of primordial nucleosynthesis.
A. Berlin, N. Blinov, S. Li
semanticscholar   +1 more source

The Nuclear Astrophysics program at n_TOF (CERN)

EPJ Web of Conferences, 2017
An important experimental program on Nuclear Astrophysics is being carried out at the n_TOF since several years, in order to address the still open issues in stellar and primordial nucleosynthesis.
Colonna N., Aberle O., Andrzejewski J., Audouin L., Bacak M., Balibrea J., Barbagallo M., Bečvář F., Berthoumieux E., Billowes J., Bosnar D., Brown A., Caamaño M., Calviño F., Calviani M., Cano-Ott D., Cardella R., Casanovas A., Cerutti F., Chen Y. H., Chiaveri E., Clai G., Cortés G., Cortés-Giraldo M. A., Cosentino, Cristallo S., Damone L. A., Diakaki M., Domingo-Pardo C., Dressler L. R., Dupont E., Durán I., Fernández-Domínguez B., Ferrari A., Ferreira P., Finocchiaro P., Furman V., Göbel K., García A. R., Gawlik A., Gilardoni S., Glodariu T., Gonçalves I. F., González E., Griesmayer E., Guerrero C., Gunsing F., Harada H., Heinitz S., Hernandez-Prieto A., Heyse J., Jenkins D. G., Jericha E., Käppeler F., Kadi Y., Kalamara A., Kavrigin P., Kimura A., Kivel N., Kokkoris M., Kroll J., Krtička M., Kurtulgil D., Langer C., Leal-Cidoncha E., Lederer C., Lerendegui-Marco J., Leeb H., Lo Meo S., Lonsdale S. J., Losito S., Macina D., Mallik A., Marganiec J., Martínez T., Masi A., Massimi C., Mastinu P., Mastromarco M., Maugeri E. A., Mazzone A., Mendoza E., Mengoni A., Mingrone F., Milazzo P. M., Mirea M., Musumarra A., Negret A., Nolte R., Oprea A., Patronis N., Pavlik A., Perkowski J., Piersanti L., Porras I., Praena J., Quesada J. M., Radeck D., Rauscher T., Reifarth R., Riego A., Robles M.S., Rubbia C., Ryan J. A., Sabaté-Gilarte M., Saxena A., Schillebeeckx P., Schumann D., Sedyshev P., Smith A. G., Sosnin N. V., Stamatopoulos A., Tagliente G., Tain J. L., Tarifeño-Saldivia A., Tassan-Got L., Tsinganis A., Valenta S., Vannini G., Variale V., Vaz P., Ventura A., Vlachoudis V., Vlastou R., Wallner A., Warren S., Weiss C., Woods P. J., Wright T., Žugec P.   +129 more
doaj   +1 more source

Big bang nucleosynthesis: Present status [PDF]

, 2015
Big-bang nucleosynthesis (BBN) describes the production of the lightest nuclides via a dynamic interplay among the four fundamental forces during the first seconds of cosmic time.
R. Cyburt, B. Fields, K. Olive, Tsung-Han Yeh   +3 more
semanticscholar   +1 more source

Precise Measurement of Magnesium Isotopes in Fe‐Mg Minerals Using a Multi‐collector SHRIMP Ion Microprobe

Geostandards and Geoanalytical Research, Volume 48, Issue 2, Page 331-343, June 2024.
Key Points Corrected for the Earth's magnetic field, the SHRIMP's IMF depends on the mineral species, not the chemical composition. The IMF arises from the force constant difference between "hard" and "soft" bonds, which is characteristic of each mineral. This permitted the calculation of IMF‐correction factors for most common Mg‐bearing minerals.
Fernando Bea, Pilar Montero, Delia Ortega, José F. Molina, Aitor Cambeses, Leticia Barcos, Shui‐Jiong Wang, Shan Ke   +7 more
wiley   +1 more source

Uncertainties in νp-process nucleosynthesis from Monte Carlo variation of reaction rates [PDF]

Monthly notices of the Royal Astronomical Society, 2019
It has been suggested that a νp-process can occur when hot, dense, and proton-rich matter is expanding within a strong flux of antineutrinos. In such an environment, proton-rich nuclides can be produced in sequences of proton captures and (n, p ...
N. Nishimura (西村信哉), T. Rauscher, R. Hirschi, G. Cescutti, A. Murphy, C. Fröhlich   +5 more
semanticscholar   +1 more source