Type I X-ray bursts, one of the explosive astrophysical phenomena, provide important sites for nucleosynthesis. The 14O(α,p)17F reaction is a key breakout pathway from the hot CNO cycle and strongly influences the onset of the rapid proton-capture process. However, most available constraints rely on indirect measurements, and direct cross-section data in the low-energy regime relevant to X-ray bursts remain scarce, leading to significant uncertainties in astrophysical models.
We performed a direct measurement of the 14O(α,p)17F reaction using the active-target time projection chamber TexAT_v2 with a radioactive 14O beam from the CRIB. The measurement extends experimental constraints toward lower center-of-mass energies in the astrophysically relevant region. Reaction events were reconstructed using Micromegas tracking together with silicon and CsI(Tl) detectors, and analyzed with the LILAK framework, including Geant4-based efficiency simulations.
We will present the measured excitation function and compare the results with previous experiments and theoretical predictions. The implications of the updated cross-section constraints for the astrophysically relevant energy region and Type I X-ray burst models will be discussed.
Chaeyeon Park
(IRIS/IBS)
Sunghoon (Tony) Ahn
(Institute for Basic Science)
A. Chen
A. Dohi
A. Psaltis
Dr
Aram Kim
(CENuM, Korea University)
Dr
Byul Moon
(Center for Exotic Nuclear Studies, Institute for Basic Science)
Byungsik Hong
(Korea University)
C.E. Parker
C.H. Kim
D. Bardayan
Dahee Kim
(Ewha Womans University)
Grigory Rogachev
(Texas A&M University)
Gyoungmo Gu
(Sungkyunkwan University)
Hidetoshi Yamaguchi
(CNS, the University of Tokyo)
Hyeji Lee
(University of Oslo)
J. Bishop
Dr
Jung Woo Lee
(Center for Exotic Nuclear Studies, Institutes for Basic Science)
Kevin Hahn
(Center for Exotic Nuclear Studies, IBS)
Kodai Okawa
Kyungyuk Chae
(Department of Physics, Sungkyunkwan University)
M. Avila
M. Barbui
M. Roosa
Masaki Sasano
(RIKEN Nishina Center)
Michele Sferrazza
(Université libre de Bruxelles)
Dr
Minju Kim
(Center for Exotic Nuclear Studies)
N.N. Duy
Naohito Iwasa
(Department of Physics, Tohoku University)
Nobuaki IMAI
(CNS, Univ. of Tokyo)
Noritaka Kitamura
(Center for Nuclear Study, University of Tokyo)
Qian Zhang
S. Do
S.H. Kim
Seiya Hayakawa
(Center for Nuclear Study, University of Tokyo)
Prof.
Shigeru Kubono
(RIKEN Nishina Center)
Dr
Soomi Cha
(Center for Exotic Nuclear Studies, Institute for Basic Science)
Dr
Sunghan Bae
(IRIS, IBS)
Takashi Nakamura
(Institute of Science Tokyo)
Thomas Chillery
(University of Naples)
Yevgen Koshchiy
(Cyclotron Institute, Texas A&M University)
Yudong Luo
Yung Hee Kim
(Center for Exotic Nuclear Studies (CENS), Institute for Basic Science)
marco la cognata
(infn-lns)
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