The Karlsruhe Astrophysical Database of Nucleosynthesis in Stars Project – Status and Prospects

Dillmann, I.; Szücs, T.; Plag, R.; Fülöp, Zsolt; Käppeler, F.; Mengoni, A.; Rauscher, T.

doi:10.1016/j.nds.2014.07.038

Cited by 49 publications

(54 citation statements)

References 32 publications

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“…[10]. The experimentally-constrained Maxwellian-averaged cross section at 25 keV is estimated to 0.18 ± 0.04 b, a value close to KADoNis database of 0.179 ± 0.045 b [19] and to the experimental value of 0.13 ± 0.07 b from Ref. [10].…”

Section: Uncertainties Implementationsupporting

confidence: 72%

Capture cross sections on unstable nuclei

et al. 2017

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Abstract. Accurate neutron-capture cross sections on unstable nuclei near the line of beta stability are crucial for understanding the s-process nucleosynthesis. However, neutron-capture cross sections for short-lived radionuclides are difficult to measure due to the fact that the measurements require both highly radioactive samples and intense neutron sources. Essential ingredients for describing the γ decays following neutron capture are the γ -ray strength function and level densities. We will compare different indirect approaches for obtaining the most relevant observables that can constrain Hauser-Feshbach statistical-model calculations of capture cross sections. Specifically, we will consider photon scattering using monoenergetic and 100% linearly polarized photon beams. Challenges that exist on the path to obtaining neutron-capture cross sections for reactions on isotopes near and far from stability will be discussed.

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Section: Uncertainties Implementationsupporting

confidence: 72%

Capture cross sections on unstable nuclei

et al. 2017

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“…The adopted gold reference cross section was taken from the new version KADONIS V1.0 [24]. Between kT = 5 and 50 keV it was derived by the weighted average of recent measurements at GELINA [25] and n TOF [26,27] and between kT = 60−100 keV by the average of the evaluated cross sections from the data libraries JEFF-3.2, JENDL-4.0, ENDF/B-VII.1 [28][29][30].…”

Section: -4mentioning

confidence: 99%

Accelerator mass spectrometry measurements of theC13(n,γ)C14and
Wallner
¹
,
Bichler
²
,
Buczak
³

et al. 2016
Phys. Rev. C
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28
1
17
0
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The technique of accelerator mass spectrometry (AMS), offering a complementary tool for sensitive studies of key reactions in nuclear astrophysics, was applied for measurements of the 13 C(n,γ ) 14 C and the 14 N(n,p) 14 C cross sections, which act as a neutron poison in s-process nucleosynthesis. Solid samples were irradiated at Karlsruhe Institute of Technology with neutrons closely resembling a Maxwell-Boltzmann distribution for kT = 25 keV, and also at higher energies between E n = 123 and 182 keV. After neutron irradiation the produced amount of 14 C in the samples was measured by AMS at the Vienna Environmental Research Accelerator (VERA) facility. For both reactions the present results provide important improvements compared to previous experimental data, which were strongly discordant in the astrophysically relevant energy range and missing for the comparably strong resonances above 100 keV. For 13 C(n,γ ) we find a four times smaller cross section around kT = 25 keV than a previous measurement. For 14 N(n,p), the present data suggest two times lower cross sections between 100 and 200 keV than had been obtained in previous experiments and data evaluations. The effect of the new stellar cross sections on the s process in low-mass asymptotic giant branch stars was studied for stellar models of 2 M initial mass, and solar and 1/10 th solar metallicity.

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“…Solid as it may look mathematically, the Monte Carlo methodology adopted to evaluate the reaction rate uncertainties is not free from some problems of physical nature, as briefly acknowledged by [89]. Another compilation, referred to as KADoNiS (Karlsruhe Astrophysical Database of Nucleosynthesis in Stars) [359] is dedicated to experimentally-based neutron capture cross sections between 1 H and 210 Bi of relevance to the s-process, and to proton and α-particle captures between 70 Ge and 209 Bi pertinent to the p-process (Section 8.5).…”

Section: Compilations Of Nuclear Data and Thermonuclear Reaction Ratementioning

confidence: 99%

“…In general, these uncertainties have, however, a more limited impact than those of astrophysical origin. This results from the fact that the s-process path lies close to the valley of nuclear stability, so that most neutron capture cross sections have been measured at supra-thermal energies of astrophysical relevance [359]. The situation is somewhat less pleasing at branching points involving unstable nuclides with generally unmeasured neutron capture cross sections and more or less uncertain astrophysical β − -decay rates [174,362].…”

Section: Specific S-process Sitesmentioning

confidence: 99%

Astronuclear Physics: A tale of the atomic nuclei in the skies

Arnould

Goriely

2020

Progress in Particle and Nuclear Physics

112

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A century ago, nuclear physics entered astrophysics, giving birth to a new field of science referred to as "Nuclear Astrophysics". With time, it developed at an impressive pace into a vastly inter-and multidisciplinary discipline bringing into its wake not only astronomy and cosmology, but also many other sub-fields of physics, especially particle, solid-state and computational physics, as well as chemistry, geology and even biology. The present Astronuclear Physics review focusses primarily on the facets of nuclear physics that are of relevance to astronomy and astrophysics, the theoretical aspects being of special concern here. The observational aspects of astronomy and astrophysics that may have some connection to nuclear physics are only broadly reviewed, mainly through the provision of recent relevant references. Multi-messenger astronomy has developed most remarkably during the last decades, with often direct implications for nuclear astrophysics. The electromagnetic view of the components of the Universe has improved dramatically at all wavelengths, from the γ-ray to the radio domains, providing important new information on the Big Bang and the properties of stars. Neutrino astronomy has made giant steps forward. In particular, the famed "solar neutrino problem" is now behind us. The long-sought gravitational waves have at last been detected, with direct relevance namely to the merger of compact stars. The composition of Galactic Cosmic Rays and stellar/solar energetic particles is better known than ever, providing constrains on the GCR physics.On the stellar modeling side, we broadly brush the progress that has been made based on new observations, and even more so on the spectacular increase in computer capabilities. We briefly outline recent advances regarding the quiescent evolution of stars, as well as the eventual catastrophic supernova explosion of certain classes of them. In spite of significant improvements in the simulations, many long-standing problems still await solid solutions, particularly regarding the details and robustness of explosion simulations. In fact, new questions are continuously emerging, and new facts may endanger old ideas.The lion's share of this review concerns the nuclear physics phenomena that may be at work in astrophysical conditions, with a strong focus on theory. Exceptionally large varieties of nuclei have to be dealt with, ranging from the lightest to the heaviest ones, from the valley of nuclear stability all the way to the proton and neutron drip lines. An additional serious difficulty comes from the fact that the nuclei are immersed in highly unusual environments which may have a significant impact on their static properties, the diversity of their transmutation modes, some of which not being observable in the laboratory, and on the probabilities of these modes. The description of nuclei as individual entities has even to be replaced by the construction of an Equation of State at high enough temperatures and/or densities prevailing in the cores of exploding stars an...

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The Karlsruhe Astrophysical Database of Nucleosynthesis in Stars Project – Status and Prospects

Cited by 49 publications

References 32 publications

Capture cross sections on unstable nuclei

Capture cross sections on unstable nuclei

Accelerator mass spectrometry measurements of theC13(n,γ)C14and
Wallner
¹
,
Bichler
²
,
Buczak
³

et al. 2016
Phys. Rev. C
Self Cite
28
1
17
0
View full text Add to dashboard Cite

Astronuclear Physics: A tale of the atomic nuclei in the skies

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The Karlsruhe Astrophysical Database of Nucleosynthesis in Stars Project – Status and Prospects

Cited by 49 publications

References 32 publications

Capture cross sections on unstable nuclei

Capture cross sections on unstable nuclei

Accelerator mass spectrometry measurements of theC13(n,γ)C14andWallner1, Bichler2, Buczak3 et al. 2016Phys. Rev. CSelf Cite281170View full textAdd to dashboardCite

Astronuclear Physics: A tale of the atomic nuclei in the skies

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Accelerator mass spectrometry measurements of theC13(n,γ)C14and
Wallner
¹
,
Bichler
²
,
Buczak
³

et al. 2016
Phys. Rev. C
Self Cite
28
1
17
0
View full text Add to dashboard Cite