First Direct Measurement of Mg(α,p)25Al and Implications for X-Ray Burst Model-Observation Comparisons
Type-I x-ray bursts can reveal the properties of an accreting neutron star system when compared with astrophysics model calculations. However, model results are sensitive to a handful of uncertain nuclear reaction rates, such as 22Mg(α , p). We report the first direct measurement of 22Mg(α , p), per...
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| Veröffentlicht in: | Physical review letters 2020-11, Vol.125 (20) |
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| creator | Randhawa, J. S. Ayyad, Y. Mittig, W. Meisel, Z. Ahn, T. Aguilar, S. Alvarez-Pol, H. Bardayan, D. W. Bazin, D. Beceiro-Novo, S. Blankstein, D. Carpenter, L. Cortesi, M. Cortina-Gil, D. Gastis, P. Hall, M. Henderson, S. Kolata, J. J. Mijatovic, T. Ndayisabye, F. O’Malley, P. Pereira, J. Pierre, A. Robert, H. Santamaria, C. Schatz, H. Smith, J. Watwood, N. Zamora, J. C. |
| description | Type-I x-ray bursts can reveal the properties of an accreting neutron star system when compared with astrophysics model calculations. However, model results are sensitive to a handful of uncertain nuclear reaction rates, such as 22Mg(α , p). We report the first direct measurement of 22Mg(α , p), performed with the Active Target Time Projection Chamber. The corresponding astrophysical reaction rate is orders of magnitude larger than determined from a previous indirect measurement in a broad temperature range. Overall, our new measurement suggests a less-compact neutron star in the source GS1826-24. |
| format | Article |
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S. ; Ayyad, Y. ; Mittig, W. ; Meisel, Z. ; Ahn, T. ; Aguilar, S. ; Alvarez-Pol, H. ; Bardayan, D. W. ; Bazin, D. ; Beceiro-Novo, S. ; Blankstein, D. ; Carpenter, L. ; Cortesi, M. ; Cortina-Gil, D. ; Gastis, P. ; Hall, M. ; Henderson, S. ; Kolata, J. J. ; Mijatovic, T. ; Ndayisabye, F. ; O’Malley, P. ; Pereira, J. ; Pierre, A. ; Robert, H. ; Santamaria, C. ; Schatz, H. ; Smith, J. ; Watwood, N. ; Zamora, J. C.</creator><creatorcontrib>Randhawa, J. S. ; Ayyad, Y. ; Mittig, W. ; Meisel, Z. ; Ahn, T. ; Aguilar, S. ; Alvarez-Pol, H. ; Bardayan, D. W. ; Bazin, D. ; Beceiro-Novo, S. ; Blankstein, D. ; Carpenter, L. ; Cortesi, M. ; Cortina-Gil, D. ; Gastis, P. ; Hall, M. ; Henderson, S. ; Kolata, J. J. ; Mijatovic, T. ; Ndayisabye, F. ; O’Malley, P. ; Pereira, J. ; Pierre, A. ; Robert, H. ; Santamaria, C. ; Schatz, H. ; Smith, J. ; Watwood, N. ; Zamora, J. C. ; Lawrence Berkeley National Lab. 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However, model results are sensitive to a handful of uncertain nuclear reaction rates, such as 22Mg(α , p). We report the first direct measurement of 22Mg(α , p), performed with the Active Target Time Projection Chamber. The corresponding astrophysical reaction rate is orders of magnitude larger than determined from a previous indirect measurement in a broad temperature range. 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| source | American Physical Society Journals; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals |
| subjects | nuclear astrophysics NUCLEAR PHYSICS AND RADIATION PHYSICS nuclear physics of explosive environments nuclear reactions |
| title | First Direct Measurement of Mg(α,p)25Al and Implications for X-Ray Burst Model-Observation Comparisons |
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