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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

First Direct Measurement of Mg-22(alpha,p)Al-25 and Implications for X-Ray Burst Model-Observation Comparisons

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Author(s):
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Randhawa, J. S. [1, 2] ; Ayyad, Y. [1] ; Mittig, W. [3, 1] ; Meisel, Z. [4] ; Ahn, T. [5] ; Aguilar, S. [5] ; Alvarez-Pol, H. [6] ; Bardayan, D. W. [5] ; Bazin, D. [1] ; Beceiro-Novo, S. [3] ; Blankstein, D. [5] ; Carpenter, L. [1] ; Cortesi, M. [1] ; Cortina-Gil, D. [6] ; Gastis, P. [7, 2] ; Hall, M. [5] ; Henderson, S. [5] ; Kolata, J. J. [5] ; Mijatovic, T. [1, 8] ; Ndayisabye, F. [1] ; O'Malley, P. [5] ; Pereira, J. [1] ; Pierre, A. [1] ; Robert, H. [1] ; Santamaria, C. [1, 9] ; Schatz, H. [3, 1, 2] ; Smith, J. [1] ; Watwood, N. [1] ; Zamora, J. C. [10, 1]
Total Authors: 29
Affiliation:
[1] Michigan State Univ, Natl Superconducting Cyclotron Lab, E Lansing, MI 48824 - USA
[2] Michigan State Univ, Joint Inst Nucl Astrophys, Ctr Evolut Elements, E Lansing, MI 48824 - USA
[3] Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 - USA
[4] Ohio Univ, Inst Nucl & Particle Phys, Dept Phys & Astron, Athens, OH 45701 - USA
[5] Univ Notre Dame, Dept Phys, Indianapolis, IN 46556 - USA
[6] Univ Santiago de Compostela, IGFAE, E-15782 Santiago De Compostela - Spain
[7] Cent Michigan Univ, Dept Phys, Mt Pleasant, MI 48859 - USA
[8] Rudjer Boskovic Inst, HR-10002 Zagreb - Croatia
[9] Lawrence Berkeley Natl Lab, Nucl Sci Div, Berkeley, CA 94720 - USA
[10] Univ Sao Paulo, Inst Fis, BR-05508090 Sao Paulo - Brazil
Total Affiliations: 10
Document type: Journal article
Source: Physical Review Letters; v. 125, n. 20 NOV 10 2020.
Web of Science Citations: 0
Abstract

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 Mg-22(alpha, p). We report the first direct measurement of Mg-22(alpha, 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. Our new measurement suggests a less-compact neutron star in the source GS1826-24. (AU)

FAPESP's process: 18/04965-4 - Study of structure and nuclear reactions induced by exotic nuclei using active targets
Grantee:Juan Carlos Zamora Cardona
Support type: Scholarships in Brazil - Post-Doctorate