First direct measurement of \(^{22}\)Mg(\(\alpha\),p)\(^{25}\)Al and implications for X-ray burst model-observation comparisons

First direct measurement of \(^{22}\)Mg(\(\alpha\),p)\(^{25}\)Al and implications for X-ray burst model-observation comparisons

Type-I X-ray burst (XRB) light curves are sensitive to the model's nuclear input and consequently affects the model-observation comparisons. \(^{22}\)Mg(\(\alpha\),p)\(^{25}\)Al is among the most important reactions which directly impact the XRB light curve. We report the first direct measureme...

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Veröffentlicht in:arXiv.org 2020-02
Hauptverfasser: Randhawa, J S, Ayyad, Y, Mittig, W, Meisel, Z, Ahn, T, Aguilar, S, Alvarez-Pol, H, Bardayan, D W, Bazin, D, Beceiro-Novo, S, Carpenter, L, Cortesi, M, Cortina-Gil, D, Blankstein, D, Gastis, P, Hall, M, Henderson, S, Kolata, J J, Mijatovic, T, Ndayisabye, F, Malley, P O, Pereira, J, Pierre, A, Robert, H, Santamaria, C, Schatz, H, Smith, J, Watwood, N, Zamora, J C
Format: Artikel
Sprache:eng
Schlagworte:
Alpha rays
Aluminum
Light curve
Magnesium
Neutron stars
Neutrons
Radiation counters
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Zusammenfassung:Type-I X-ray burst (XRB) light curves are sensitive to the model's nuclear input and consequently affects the model-observation comparisons. \(^{22}\)Mg(\(\alpha\),p)\(^{25}\)Al is among the most important reactions which directly impact the XRB light curve. We report the first direct measurement of \(^{22}\)Mg(\(\alpha\),p)\(^{25}\)Al using the Active Target Time Projection Chamber. XRB light curve model-observation comparison for the source \(\tt{GS 1826-24}\) using new reaction rate implies a less-compact neutron star than previously inferred. Additionally, our result removes an important uncertainty in XRB model calculations that previously hindered extraction of the neutron star compactness.
ISSN:2331-8422
DOI:10.48550/arxiv.2001.06087