Improved precision on the experimental $E0$ decay branching ratio of the Hoyle state
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In: Physical Review C, Vol. 102, No. 2, 17.08.2020, p. 024320.
Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Improved precision on the experimental $E0$ decay branching ratio of the Hoyle state
AU - Eriksen, T. K.
AU - Kibédi, T.
AU - Reed, M. W.
AU - Stuchbery, A. E.
AU - Cook, K. J.
AU - Akber, A.
AU - Alshahrani, B.
AU - Avaa, A. A.
AU - Banerjee, K.
AU - Berriman, A. C.
AU - Bezzina, L. T.
AU - Bignell, L.
AU - Buete, J.
AU - Carter, I. P.
AU - Coombes, B. J.
AU - Dowie, J. T. H.
AU - Dasgupta, M.
AU - Evitts, L. J.
AU - Garnsworthy, A. B.
AU - Gerathy, M. S. M.
AU - Gray, T. J.
AU - Hinde, D. J.
AU - Hoang, T. H.
AU - Hota, S. S.
AU - Ideguchi, E.
AU - Lane, G. J.
AU - McCormick, B. P.
AU - Mitchell, A. J.
AU - Palalani, N.
AU - Palazzo, T.
AU - Ripper, M.
AU - Smallcombe, J.
AU - Swinton-Bland, B. M. A.
AU - Tanaka, T.
AU - Tornyi, T. G.
AU - de Vries, M. O.
PY - 2020/8/17
Y1 - 2020/8/17
N2 - Stellar carbon synthesis occurs exclusively via the 3α process, in which three α particles fuse toform 12C in the excited Hoyle state, followed by electromagnetic decay to the ground state. The Hoyle state is above the α threshold, and the rate of stellar carbon production depends on the radiative width of this state.The radiative width cannot be measured directly, and must instead be deduced by combining three separately measured quantities. One of these quantities is the E0 decay branching ratio of the Hoyle state, and the current10% uncertainty on the radiative width stems mainly from the uncertainty on this ratio. The rate of the 3α process is an important input parameter in astrophysical calculations on stellar evolution, and a high precision is imperative to constrain the possible outcomes of astrophysical models.
AB - Stellar carbon synthesis occurs exclusively via the 3α process, in which three α particles fuse toform 12C in the excited Hoyle state, followed by electromagnetic decay to the ground state. The Hoyle state is above the α threshold, and the rate of stellar carbon production depends on the radiative width of this state.The radiative width cannot be measured directly, and must instead be deduced by combining three separately measured quantities. One of these quantities is the E0 decay branching ratio of the Hoyle state, and the current10% uncertainty on the radiative width stems mainly from the uncertainty on this ratio. The rate of the 3α process is an important input parameter in astrophysical calculations on stellar evolution, and a high precision is imperative to constrain the possible outcomes of astrophysical models.
M3 - Article
VL - 102
SP - 024320
JO - Physical Review C
JF - Physical Review C
SN - 2469-9985
IS - 2
ER -