The branching ratio Γα/Γγ of the 4.033 MeV state in 19Ne

K. E. Rehm; A. H. Wuosmaa; C. L. Jiang; J. Greene; A. Heinz; D. Henderson; R. V.F. Janssens; L. Jisonna; E. F. Moore; G. Mukherjee; R. C. Pardo; M. Paul; T. Pennington; J. P. Schiffer; R. E. Segel; R. H. Siemssen

doi:10.1016/S0375-9474(03)00706-1

The branching ratio Γ_α/Γ_γ of the 4.033 MeV state in ¹⁹Ne

K. E. Rehm^*, A. H. Wuosmaa, C. L. Jiang, J. Greene, A. Heinz, D. Henderson, R. V.F. Janssens, L. Jisonna, E. F. Moore, G. Mukherjee, R. C. Pardo, M. Paul, T. Pennington, J. P. Schiffer, R. E. Segel, R. H. Siemssen

^*Corresponding author for this work

Racah Institute of Physics

Research output: Contribution to journal › Article › peer-review

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Abstract

The ¹⁵O(α,γ)¹⁹Ne reaction is an important pathway from the hot CNO cycle to the rp process that leads to the synthesis of heavier nuclei. At lower temperatures, the reaction rate is dominated by the transition to the 4.033 MeV 3/2⁺ state in ¹⁹Ne, the first level above the ¹⁵O(α,γ) threshold at 3.534 MeV. We have performed an indirect measurement of the ratio Γ_α/Γ_γ by populating the 3/2⁺ state via the ³He(²⁰Ne,α ¹⁹Ne reaction in inverse kinematics. The α particles were detected in a double-sided Si strip detector telescope while the heavy reaction products, ¹⁹Ne and ¹⁵O, were identified in the focal plane of a magnetic spectrograph. For the 4.033 MeV state in ¹⁹Ne an upper limit Γ_α/Γ_γ of ≤ 7x10^-4 has been obtained.

Original language	English
Pages (from-to)	151-154
Number of pages	4
Journal	Nuclear Physics A
Volume	723
Issue number	1-2
DOIs	https://doi.org/10.1016/S0375-9474(03)00706-1
State	Published - 28 Jul 2003

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Rehm, K. E., Wuosmaa, A. H., Jiang, C. L., Greene, J., Heinz, A., Henderson, D., Janssens, R. V. F., Jisonna, L., Moore, E. F., Mukherjee, G., Pardo, R. C., Paul, M., Pennington, T., Schiffer, J. P., Segel, R. E., & Siemssen, R. H. (2003). The branching ratio Γ_α/Γ_γ of the 4.033 MeV state in ¹⁹Ne. Nuclear Physics A, 723(1-2), 151-154. https://doi.org/10.1016/S0375-9474(03)00706-1

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title = "The branching ratio Γα/Γγ of the 4.033 MeV state in 19Ne",

abstract = "The 15O(α,γ)19Ne reaction is an important pathway from the hot CNO cycle to the rp process that leads to the synthesis of heavier nuclei. At lower temperatures, the reaction rate is dominated by the transition to the 4.033 MeV 3/2+ state in 19Ne, the first level above the 15O(α,γ) threshold at 3.534 MeV. We have performed an indirect measurement of the ratio Γα/Γγ by populating the 3/2+ state via the 3He(20Ne,α 19Ne reaction in inverse kinematics. The α particles were detected in a double-sided Si strip detector telescope while the heavy reaction products, 19Ne and 15O, were identified in the focal plane of a magnetic spectrograph. For the 4.033 MeV state in 19Ne an upper limit Γα/Γγ of ≤ 7x10-4 has been obtained.",

author = "Rehm, {K. E.} and Wuosmaa, {A. H.} and Jiang, {C. L.} and J. Greene and A. Heinz and D. Henderson and Janssens, {R. V.F.} and L. Jisonna and Moore, {E. F.} and G. Mukherjee and Pardo, {R. C.} and M. Paul and T. Pennington and Schiffer, {J. P.} and Segel, {R. E.} and Siemssen, {R. H.}",

year = "2003",

month = jul,

day = "28",

doi = "10.1016/S0375-9474(03)00706-1",

language = "אנגלית",

volume = "723",

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T1 - The branching ratio Γα/Γγ of the 4.033 MeV state in 19Ne

AU - Rehm, K. E.

AU - Wuosmaa, A. H.

AU - Jiang, C. L.

AU - Greene, J.

AU - Heinz, A.

AU - Henderson, D.

AU - Janssens, R. V.F.

AU - Jisonna, L.

AU - Moore, E. F.

AU - Mukherjee, G.

AU - Pardo, R. C.

AU - Paul, M.

AU - Pennington, T.

AU - Schiffer, J. P.

AU - Segel, R. E.

AU - Siemssen, R. H.

PY - 2003/7/28

Y1 - 2003/7/28

N2 - The 15O(α,γ)19Ne reaction is an important pathway from the hot CNO cycle to the rp process that leads to the synthesis of heavier nuclei. At lower temperatures, the reaction rate is dominated by the transition to the 4.033 MeV 3/2+ state in 19Ne, the first level above the 15O(α,γ) threshold at 3.534 MeV. We have performed an indirect measurement of the ratio Γα/Γγ by populating the 3/2+ state via the 3He(20Ne,α 19Ne reaction in inverse kinematics. The α particles were detected in a double-sided Si strip detector telescope while the heavy reaction products, 19Ne and 15O, were identified in the focal plane of a magnetic spectrograph. For the 4.033 MeV state in 19Ne an upper limit Γα/Γγ of ≤ 7x10-4 has been obtained.

AB - The 15O(α,γ)19Ne reaction is an important pathway from the hot CNO cycle to the rp process that leads to the synthesis of heavier nuclei. At lower temperatures, the reaction rate is dominated by the transition to the 4.033 MeV 3/2+ state in 19Ne, the first level above the 15O(α,γ) threshold at 3.534 MeV. We have performed an indirect measurement of the ratio Γα/Γγ by populating the 3/2+ state via the 3He(20Ne,α 19Ne reaction in inverse kinematics. The α particles were detected in a double-sided Si strip detector telescope while the heavy reaction products, 19Ne and 15O, were identified in the focal plane of a magnetic spectrograph. For the 4.033 MeV state in 19Ne an upper limit Γα/Γγ of ≤ 7x10-4 has been obtained.

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The branching ratio Γ_α/Γ_γ of the 4.033 MeV state in ¹⁹Ne

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