Zobrazeno 1 - 10
of 258
pro vyhledávání: '"Hutcheon D. A."'
Autor:
Adsley, P, Williams, M, Harrouz, D S, Carrasco-Rojas, D P, de Séréville, N, Hammache, F, Longland, R, Bastin, B, Davids, B, Faestermann, T, Fougères, C, Greife, U, Hertenberger, R, Hutcheon, D, La Cognata, M, Laird, AM, Lamia, L, Lennarz, A, Meyer, A, Santos, F d'Oliveira, Palmerini, S, Psaltis, A, Pizzone, R G, Romano, S, Ruiz, C, Tumino, A, Wirth, H-F
Globular clusters contain multiple stellar populations, with some previous generation of stars polluting the current stars with heavier elements. Understanding the history of globular clusters is helpful in understanding how galaxies merged and evolv
Externí odkaz:
http://arxiv.org/abs/2212.03648
Autor:
Psaltis, A., Chen, A. A., Longland, R., Connolly, D. S., Brune, C. R., Davids, B., Fallis, J., Giri, R., Greife, U, Hutcheon, D. A., Kroll, L., Lennarz, A., Liang, J., Lovely, M., Luo, M., Marshall, C., Paneru, S. N., Parikh, A., Ruiz, C., Shotter, A. C., Williams, M.
A possible mechanism to explain the origin of the light $p$-nuclei in the Galaxy is the nucleosynthesis in the proton-rich neutrino-driven wind ejecta of core-collapse supernovae via the $\nu p$-process. However this production scenario is very sensi
Externí odkaz:
http://arxiv.org/abs/2209.06472
Autor:
Psaltis, A., Chen, A. A., Longland, R., Connolly, D. S., Brune, C. R., Davids, B., Fallis, J., Giri, R., Greife, U, Hutcheon, D. A., Kroll, L., Lennarz, A., Liang, J., Lovely, M., Luo, M., Marshall, C., Paneru, S. N., Parikh, A., Ruiz, C., Shotter, A. C., Williams, M.
We have performed the first direct measurement of two resonances of the $^7$Be($\alpha,\gamma$)$^{11}$C reaction with unknown strengths using an intense radioactive $^7$Be beam and the DRAGON recoil separator. We report on the first measurement of th
Externí odkaz:
http://arxiv.org/abs/2209.06465
Autor:
Williams, M., Adsley, P., Davids, B., Greife, U., Hutcheon, D., Karpesky, J., Lennarz, A., Lovely, M., Ruiz, C.
Publikováno v:
Phys. Rev. C 103, 055805 (2021)
At temperatures below 0.1 GK the $^{19}$F$(p,\gamma)^{20}$Ne reaction is the only breakout path out of the CNO cycle. Experimental studies of this reaction are challenging from a technical perspective due to copious $\gamma$-ray background from the f
Externí odkaz:
http://arxiv.org/abs/2206.06044
Autor:
Williams, M., Laird, A. M., Choplin, A., Adsley, P., Davids, B., Greife, U., Hudson, K., Hutcheon, D., Lennarz, A., Ruiz, C.
The efficiency of the slow neutron-capture process in massive stars is strongly influenced by neutron-capture reactions on light elements. At low metallicity, $^{16}$O is an important neutron absorber, but the effectiveness of $^{16}$O as a light-ele
Externí odkaz:
http://arxiv.org/abs/2206.06016
Autor:
Wilkinson R., Lotay G., Lennarz A., Ruiz C., Christian G., Akers C., Catford W. N., Chen A. A., Connolly D., Davids B., Hutcheon D. A., Jedrejcic D., Laird A. M., Martin L., McNeice E., Riley J., Williams M.
Publikováno v:
EPJ Web of Conferences, Vol 165, p 01054 (2017)
A direct measurement of the 19Ne(p, γ)20 Na reaction has been performed in inverse kinematics at the DRAGON recoil separator, at an energy ∼ 10 keV higher than previous measurements. The key resonance in the 19 Ne + p system relevant for ONe novae
Externí odkaz:
https://doaj.org/article/73c29b04d4af4a008f199f0cf4b35b5b
Beyond the acceptance limit of DRAGON: the case of the $\mathrm{^6Li(\alpha,\gamma)^{10}B}$ reaction
Autor:
Psaltis, A., Chen, A. A., Connolly, D. S., Davids, B., Gilardy, G., Giri, R., Greife, U, Huang, W., Hutcheon, D. A., Karpesky, J., Lennarz, A., Liang, J., Paneru, M. Lovely. S. N., Ruiz, C., Tenkila, G., Williams, M.
Radiative capture reactions play a pivotal role for our understanding of the origin of the elements in the cosmos. Recoil separators provide an effective way to study these reactions, in inverse kinematics, and take advantage of the use of radioactiv
Externí odkaz:
http://arxiv.org/abs/2011.01225
Autor:
Williams, M., Lennarz, A., Laird, A. M., Battino, U., Connolly, J. José D., Ruiz, C., Chen, A., Davids, B., Esker, N., Fulton, B. R., Garg, R., Gay, x M., Greife, U., Hager, U., Hutcheon, D., Lovely, M., Lyons, S., Psaltis, A., Riley, J. E., Tattersall, A.
Publikováno v:
Phys. Rev. C 102, 035801 (2020)
The abundances of sodium and oxygen are observed to be anti-correlated in all well-studied globular clusters. Asymptotic giant branch (AGB) stars undergoing hot bottom burning (HBB) are thought to be prime candidates for producing sodium-rich oxygen-
Externí odkaz:
http://arxiv.org/abs/1910.01698
Autor:
Taggart, M. P., Akers, C., Laird, A. M., Hager, U., Ruiz, C., Hutcheon, D. A., Bentley, M. A., Brown, J. R., Buchmann, L., Chen, A. A., Chen, J., Chipps, K. A., Choplin, A., D'Auria, J. M., Davids, B., Davis, C., Diget, C. Aa., Erikson, L., Fallis, J., Fox, S. P., Frischknecht, U., Fulton, B. R., Galinski, N., Greife, U., Hirschi, R., Howell, D., Martin, L., Mountford, D., Murphy, A. St. J., Ottewell, D., Pignatari, M., Reeve, S., Ruprecht, G., Sjue, S., Veloce, L., Williams, M.
Publikováno v:
Physics Letters B 798 (2019) 134894
During the slow neutron capture process in massive stars, reactions on light elements can both produce and absorb neutrons thereby influencing the final heavy element abundances. At low metallicities, the high neutron capture rate of 16-O can inhibit
Externí odkaz:
http://arxiv.org/abs/1910.00870
Autor:
Lennarz, A., Williams, M., Laird, A. M., Battino, U., Chen, A. A., Connolly, D., Davids, B., Esker, N., Garg, R., Gay, M., Greife, U., Hager, U., Hutcheon, D., José, J., Lovely, M., Lyons, S., Psaltis, A., Riley, J. E., Tattersall, A., Ruiz, C.
In this Letter we report on the first inverse kinematics measurement of key resonances in the ${}^{22}\text{Ne}(p,\gamma)^{23}\text{Na}$ reaction which forms part of the NeNa cycle, and is relevant for ${}^{23}$Na synthesis in asymptotic giant branch
Externí odkaz:
http://arxiv.org/abs/1910.00791