Measurement of 23Na (α,p) 26Mg at Energies Relevant to 26Al Production in Massive Stars

J. R. Tomlinson; J. Fallis; A. M. Laird; S. P. Fox; C. Akers; M. Alcorta; M. A. Bentley; G. Christian; B. Davids; T. Davinson; B. R. Fulton; N. Galinski; A. Rojas; C. Ruiz; N. De Séréville; M. Shen; A. C. Shotter

doi:10.1103/PhysRevLett.115.052702

Measurement of ²³Na (α,p) ²⁶Mg at Energies Relevant to ²⁶Al Production in Massive Stars

J. R. Tomlinson, J. Fallis, A. M. Laird, S. P. Fox, C. Akers, M. Alcorta, M. A. Bentley, G. Christian, B. Davids, T. Davinson, B. R. Fulton, N. Galinski, A. Rojas, C. Ruiz, N. De Séréville, M. Shen, A. C. Shotter

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Abstract

Al26 is an important radioisotope in astrophysics that provides evidence of ongoing nucleosynthesis in the Galaxy. The Na23(α,p)Mg26 reaction has been identified by a sensitivity study as being one of the most important reactions for the production of Al26 in the convective C/Ne burning shell of massive stars. Owing to large uncertainties in previous experimental data, model calculations are used for the reaction rate of Na23(α,p)Mg26 in this sensitivity study. Current experimental data suggest a reaction rate a factor of ∼40 higher than model calculations. However, a new measurement of this reaction cross section has been made in inverse kinematics in the energy range Ec.m.=1.28-3.15MeV at TRIUMF, and found to be in reasonable agreement with the model calculation. A new reaction rate is calculated and tight constraints on the uncertainty in the production of Al26, due to this reaction, are determined.

Original language	English
Article number	052702
Number of pages	5
Journal	Physical Review Letters
Volume	115
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevLett.115.052702
Publication status	Published - 29 Jul 2015

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10.1103/PhysRevLett.115.052702

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Tomlinson, J. R., Fallis, J., Laird, A. M., Fox, S. P., Akers, C., Alcorta, M., Bentley, M. A., Christian, G., Davids, B., Davinson, T., Fulton, B. R., Galinski, N., Rojas, A., Ruiz, C., De Séréville, N., Shen, M., & Shotter, A. C. (2015). Measurement of ²³Na (α,p) ²⁶Mg at Energies Relevant to ²⁶Al Production in Massive Stars. Physical Review Letters, 115(5), Article 052702. https://doi.org/10.1103/PhysRevLett.115.052702

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title = "Measurement of 23Na (α,p) 26Mg at Energies Relevant to 26Al Production in Massive Stars",

abstract = "Al26 is an important radioisotope in astrophysics that provides evidence of ongoing nucleosynthesis in the Galaxy. The Na23(α,p)Mg26 reaction has been identified by a sensitivity study as being one of the most important reactions for the production of Al26 in the convective C/Ne burning shell of massive stars. Owing to large uncertainties in previous experimental data, model calculations are used for the reaction rate of Na23(α,p)Mg26 in this sensitivity study. Current experimental data suggest a reaction rate a factor of ∼40 higher than model calculations. However, a new measurement of this reaction cross section has been made in inverse kinematics in the energy range Ec.m.=1.28-3.15MeV at TRIUMF, and found to be in reasonable agreement with the model calculation. A new reaction rate is calculated and tight constraints on the uncertainty in the production of Al26, due to this reaction, are determined.",

author = "Tomlinson, {J. R.} and J. Fallis and Laird, {A. M.} and Fox, {S. P.} and C. Akers and M. Alcorta and Bentley, {M. A.} and G. Christian and B. Davids and T. Davinson and Fulton, {B. R.} and N. Galinski and A. Rojas and C. Ruiz and {De S{\'e}r{\'e}ville}, N. and M. Shen and Shotter, {A. C.}",

year = "2015",

month = jul,

day = "29",

doi = "10.1103/PhysRevLett.115.052702",

language = "English",

volume = "115",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

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Tomlinson, JR, Fallis, J, Laird, AM , Fox, SP, Akers, C, Alcorta, M, Bentley, MA, Christian, G, Davids, B, Davinson, T, Fulton, BR, Galinski, N, Rojas, A, Ruiz, C, De Séréville, N, Shen, M & Shotter, AC 2015, 'Measurement of ²³Na (α,p) ²⁶Mg at Energies Relevant to ²⁶Al Production in Massive Stars', Physical Review Letters, vol. 115, no. 5, 052702. https://doi.org/10.1103/PhysRevLett.115.052702

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T1 - Measurement of 23Na (α,p) 26Mg at Energies Relevant to 26Al Production in Massive Stars

AU - Tomlinson, J. R.

AU - Fallis, J.

AU - Laird, A. M.

AU - Fox, S. P.

AU - Akers, C.

AU - Alcorta, M.

AU - Bentley, M. A.

AU - Christian, G.

AU - Davids, B.

AU - Davinson, T.

AU - Fulton, B. R.

AU - Galinski, N.

AU - Rojas, A.

AU - Ruiz, C.

AU - De Séréville, N.

AU - Shen, M.

AU - Shotter, A. C.

PY - 2015/7/29

Y1 - 2015/7/29

N2 - Al26 is an important radioisotope in astrophysics that provides evidence of ongoing nucleosynthesis in the Galaxy. The Na23(α,p)Mg26 reaction has been identified by a sensitivity study as being one of the most important reactions for the production of Al26 in the convective C/Ne burning shell of massive stars. Owing to large uncertainties in previous experimental data, model calculations are used for the reaction rate of Na23(α,p)Mg26 in this sensitivity study. Current experimental data suggest a reaction rate a factor of ∼40 higher than model calculations. However, a new measurement of this reaction cross section has been made in inverse kinematics in the energy range Ec.m.=1.28-3.15MeV at TRIUMF, and found to be in reasonable agreement with the model calculation. A new reaction rate is calculated and tight constraints on the uncertainty in the production of Al26, due to this reaction, are determined.

AB - Al26 is an important radioisotope in astrophysics that provides evidence of ongoing nucleosynthesis in the Galaxy. The Na23(α,p)Mg26 reaction has been identified by a sensitivity study as being one of the most important reactions for the production of Al26 in the convective C/Ne burning shell of massive stars. Owing to large uncertainties in previous experimental data, model calculations are used for the reaction rate of Na23(α,p)Mg26 in this sensitivity study. Current experimental data suggest a reaction rate a factor of ∼40 higher than model calculations. However, a new measurement of this reaction cross section has been made in inverse kinematics in the energy range Ec.m.=1.28-3.15MeV at TRIUMF, and found to be in reasonable agreement with the model calculation. A new reaction rate is calculated and tight constraints on the uncertainty in the production of Al26, due to this reaction, are determined.

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Measurement of ²³Na (α,p) ²⁶Mg at Energies Relevant to ²⁶Al Production in Massive Stars

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Alison Monica Laird

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Measurement of 23Na (α,p) 26Mg at Energies Relevant to 26Al Production in Massive Stars

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Measurement of ²³Na (α,p) ²⁶Mg at Energies Relevant to ²⁶Al Production in Massive Stars