Journal
PHYSICAL REVIEW LETTERS
Volume 125, Issue 20, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.125.202701
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Funding
- U.S. National Science Foundation (NSF), U.S. [MRI-0923087, PHY-140444, PHY-1565546, PHY-1713857, PHY-1430152, PHY-1102511, PHY-1913554]
- NSF [14-01343]
- College of Science and Engineering of CMU
- U.S. Department of Energy [DE-FG02-88er40387, DESC0019042]
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [2018/04965-4]
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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.
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