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Measurement of radiative α-capture cross sections on 98Ru and 144Sm for γ-process nucleosynthesis
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| Zeitschriftentitel: | Journal of Physics: Conference Series |
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| Personen und Körperschaften: | , , , , , , , , , , , |
| In: | Journal of Physics: Conference Series, 1668, 2020, 1, S. 012036 |
| Format: | E-Article |
| Sprache: | Unbestimmt |
| veröffentlicht: |
IOP Publishing
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| Schlagwörter: |
| Zusammenfassung: | <jats:title>Abstract</jats:title> <jats:p>Since <jats:italic>p</jats:italic> isotopes cannot be produced in neutron-capture reaction networks, a production mechanism via photodisintegration reactions was proposed - the <jats:italic>γ</jats:italic> process. The specifc path of this reaction network, however, depends strongly on the statistically averaged ratios for proton-, neutron-, and <jats:italic>α</jats:italic>-decay widths.</jats:p> <jats:p>It was shown in the past, that the uncertainties in the <jats:italic>α</jats:italic>-decay widths have an impact on the isotopic abundance of the <jats:italic>γ</jats:italic>-process ashes. Besides systematic studies of the <jats:italic>α</jats:italic>+nucleus optical-model potential, direct measurements of (α, γ) reaction are needed to reduce the unpredictability of (<jats:italic>γ, α</jats:italic>) reaction rates.</jats:p> <jats:p>We present preliminary results from direct measurements of the <jats:sup>98</jats:sup>Ru(<jats:italic>α,γ</jats:italic>) and <jats:sup>144</jats:sup>Sm(<jats:italic>α,γ</jats:italic>) cross sections via in-beam measurements at the University of Cologne and the Ruhr-Universität Bochum and activation experiments at the Physikalisch-Technische Bundesanstalt in Braunschweig and the Technische Universität Dresden.</jats:p> <jats:p>The in-beam experiment might help to improve our understanding of the <jats:italic>γ</jats:italic>-process contribution to the <jats:italic>p</jats:italic> nuclei in the <jats:italic>A</jats:italic> ∼ 100 mass region, while the activation experiment is important for the determination of the initial isotopic abundance ratio of the <jats:sup>146</jats:sup>Sm/<jats:sup>144</jats:sup>Sm chronometer.</jats:p> |
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| Umfang: | 012036 |
| ISSN: |
1742-6588
1742-6596 |
| DOI: | 10.1088/1742-6596/1668/1/012036 |