Advancement of Photospheric Radius Expansion and Clocked Type-I X-Ray Burst Models with the NewMg22(α,p)Al25Reaction Rate Determined at the Gamow Energy,Physical Review Letters

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Advancement of Photospheric Radius Expansion and Clocked Type-I X-Ray Burst Models with the NewMg22(α,p)Al25Reaction Rate Determined at the Gamow Energy
Physical Review Letters ( IF 8.1 ) Pub Date : 2021-10-19 , DOI: 10.1103/physrevlett.127.172701
J Hu _{1,

2} , H Yamaguchi _{3,

4} , Y H Lam _{1,

2} , A Heger _{5,

6,

7,

8} , D Kahl _{9,

10} , A M Jacobs _{8,

11} , Z Johnston _{8,

11} , S W Xu ₁ , N T Zhang ₁ , S B Ma ₁ , L H Ru ₁ , E Q Liu ₁ , T Liu ₁ , S Hayakawa ₃ , L Yang ₃ , H Shimizu ₃ , C B Hamill ₁₀ , A St J Murphy ₁₀ , J Su ₁₂ , X Fang ₁₃ , K Y Chae ₁₄ , M S Kwag ₁₄ , S M Cha ₁₄ , N N Duy _{14,

15} , N K Uyen ₁₄ , D H Kim ₁₄ , R G Pizzone ₁₆ , M La Cognata ₁₆ , S Cherubini ₁₆ , S Romano _{16,

17,

18} , A Tumino _{16,

19} , J Liang ₂₀ , A Psaltis ₂₀ , M Sferrazza ₂₁ , D Kim ₂₂ , Y Y Li _{1,

2} , S Kubono _{3,

23}

Affiliation

Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China.
School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China.
Center for Nuclear Study(CNS), the University of Tokyo, RIKEN campus, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan.
School of Physics and Astronomy, Monash University, Victoria 3800, Australia.
OzGrav-Monash-Monash Centre for Astrophysics, School of Physics and Astronomy, Monash University, Vic 3800, Australia.
Center of Excellence for Astrophysics in Three Dimensions (ASTRO-3D), Australia.
The Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA.
Extreme Light Infrastructure - Nuclear Physics, IFIN-HH, 077125 Bucharest-Măgurele, Romania.
SUPA, School of Physics & Astronomy, University of Edinburgh, Edinburgh EH9 3FD, United Kingdom.
Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA.
College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China.
Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-Sen University, Zhuhai 519082, Guangdong, China.
Department of Physics, Sungkyunkwan University, Suwon 16419, Korea.
Institute of Research and Development, Duy Tan University, Da Nang 550000, Vietnam.
Laboratori Nazionali del Sud-INFN, Via S. Sofia 62, Catania 95123, Italy.
Dipartimento di Fisica e Astronomia "Ettore Majorana"-Università degli Studi di Catania, Via. Sofia, 64 95123 Catania, Italy.
Centro Siciliano di Fisica Nucleare e Struttura della Materia (CSFNSM), Via. Sofia, 64 95123 Catania, Italy.
Facoltà di Ingegneria e Architettura, Università degli Studi di Enna "Kore," Enna 94100, Italy.
Department of Physics & Astronomy, McMaster University, Ontario L8S 4M1, Canada.
Département de Physique, Université Libre de Bruxelles, Bruxelles B-1050, Belgium.
Department of Physics, Ewha Womans University, Seoul 03760, Korea.
RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.

We report the first (in)elastic scattering measurement of

{}^{25}{Al} + p

with the capability to select and measure in a broad energy range the proton resonances in

{}^{26}{Si}

contributing to the

{}^{22}{Mg} (α, p)

reaction at type I x-ray burst energies. We measured spin-parities of four resonances above the

α

threshold of

{}^{26}{Si}

that are found to strongly impact the

{}^{22}{Mg} (α, p)

rate. The new rate advances a state-of-the-art model to remarkably reproduce light curves of the GS

1826 - 24

clocked burster with mean deviation

< 9 %

and permits us to discover a strong correlation between the He abundance in the accreting envelope of the photospheric radius expansion burster and the dominance of