Measurement of radiative proton capture on F18 and implications for oxygen-neon novae

C. Akers; C. Ruiz; L. Buchmann; G. Christian; B. Davids; J. Fallis; D. Hutcheon; L. Martin; D. Ottewell; A. Rojas; A.M. Laird; B.R. Fulton; D.W. Bardayan; L. Erikson; U. Hager; A.St.J. Murphy; K. Nelson; A. Spyrou; C. Stanford

doi:10.1103/PhysRevLett.110.262502

Measurement of radiative proton capture on F18 and implications for oxygen-neon novae

C. Akers, C. Ruiz, L. Buchmann, G. Christian, B. Davids, J. Fallis, D. Hutcheon, L. Martin, D. Ottewell, A. Rojas, A.M. Laird, B.R. Fulton, D.W. Bardayan, L. Erikson, U. Hager, A.St.J. Murphy, K. Nelson, A. Spyrou, C. Stanford

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

Abstract

The rate of the F18(p,γ)Ne19 reaction affects the final abundance of the γ-ray observable radioisotope F18, produced in novae. However, no successful measurement of this reaction exists and the rate used is calculated from incomplete information on the contributing resonances. Of the two resonances thought to play a significant role, one has a radiative width estimated from the assumed analogue state in the mirror nucleus, F19. The second does not have an analogue state assignment at all, resulting in an arbitrary radiative width being assumed. Here, we report the first successful direct measurement of the F18(p,γ)Ne19 reaction. The strength of the 665 keV resonance (E=7.076 MeV) is found to be over an order of magnitude weaker than currently assumed in nova models. Reaction rate calculations show that this resonance therefore plays no significant role in the destruction of F18 at any astrophysical energy.

Original language	English
Article number	262502
Number of pages	5
Journal	Physical Review Letters
Volume	110
Issue number	26
DOIs	https://doi.org/10.1103/PhysRevLett.110.262502
Publication status	Published - 28 Jun 2013

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Akers, C., Ruiz, C., Buchmann, L., Christian, G., Davids, B., Fallis, J., Hutcheon, D., Martin, L., Ottewell, D., Rojas, A., Laird, A. M., Fulton, B. R., Bardayan, D. W., Erikson, L., Hager, U., Murphy, A. S. J., Nelson, K., Spyrou, A., & Stanford, C. (2013). Measurement of radiative proton capture on F18 and implications for oxygen-neon novae. Physical Review Letters, 110(26), Article 262502 . https://doi.org/10.1103/PhysRevLett.110.262502

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title = "Measurement of radiative proton capture on F18 and implications for oxygen-neon novae",

abstract = "The rate of the F18(p,γ)Ne19 reaction affects the final abundance of the γ-ray observable radioisotope F18, produced in novae. However, no successful measurement of this reaction exists and the rate used is calculated from incomplete information on the contributing resonances. Of the two resonances thought to play a significant role, one has a radiative width estimated from the assumed analogue state in the mirror nucleus, F19. The second does not have an analogue state assignment at all, resulting in an arbitrary radiative width being assumed. Here, we report the first successful direct measurement of the F18(p,γ)Ne19 reaction. The strength of the 665 keV resonance (E=7.076 MeV) is found to be over an order of magnitude weaker than currently assumed in nova models. Reaction rate calculations show that this resonance therefore plays no significant role in the destruction of F18 at any astrophysical energy.",

author = "C. Akers and C. Ruiz and L. Buchmann and G. Christian and B. Davids and J. Fallis and D. Hutcheon and L. Martin and D. Ottewell and A. Rojas and A.M. Laird and B.R. Fulton and D.W. Bardayan and L. Erikson and U. Hager and A.St.J. Murphy and K. Nelson and A. Spyrou and C. Stanford",

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Akers, C, Ruiz, C, Buchmann, L, Christian, G, Davids, B, Fallis, J, Hutcheon, D, Martin, L, Ottewell, D, Rojas, A, Laird, AM , Fulton, BR, Bardayan, DW, Erikson, L, Hager, U, Murphy, ASJ, Nelson, K, Spyrou, A & Stanford, C 2013, 'Measurement of radiative proton capture on F18 and implications for oxygen-neon novae', Physical Review Letters, vol. 110, no. 26, 262502 . https://doi.org/10.1103/PhysRevLett.110.262502

TY - JOUR

T1 - Measurement of radiative proton capture on F18 and implications for oxygen-neon novae

AU - Akers, C.

AU - Ruiz, C.

AU - Buchmann, L.

AU - Christian, G.

AU - Davids, B.

AU - Fallis, J.

AU - Hutcheon, D.

AU - Martin, L.

AU - Ottewell, D.

AU - Rojas, A.

AU - Laird, A.M.

AU - Fulton, B.R.

AU - Bardayan, D.W.

AU - Erikson, L.

AU - Hager, U.

AU - Murphy, A.St.J.

AU - Nelson, K.

AU - Spyrou, A.

AU - Stanford, C.

PY - 2013/6/28

Y1 - 2013/6/28

N2 - The rate of the F18(p,γ)Ne19 reaction affects the final abundance of the γ-ray observable radioisotope F18, produced in novae. However, no successful measurement of this reaction exists and the rate used is calculated from incomplete information on the contributing resonances. Of the two resonances thought to play a significant role, one has a radiative width estimated from the assumed analogue state in the mirror nucleus, F19. The second does not have an analogue state assignment at all, resulting in an arbitrary radiative width being assumed. Here, we report the first successful direct measurement of the F18(p,γ)Ne19 reaction. The strength of the 665 keV resonance (E=7.076 MeV) is found to be over an order of magnitude weaker than currently assumed in nova models. Reaction rate calculations show that this resonance therefore plays no significant role in the destruction of F18 at any astrophysical energy.

AB - The rate of the F18(p,γ)Ne19 reaction affects the final abundance of the γ-ray observable radioisotope F18, produced in novae. However, no successful measurement of this reaction exists and the rate used is calculated from incomplete information on the contributing resonances. Of the two resonances thought to play a significant role, one has a radiative width estimated from the assumed analogue state in the mirror nucleus, F19. The second does not have an analogue state assignment at all, resulting in an arbitrary radiative width being assumed. Here, we report the first successful direct measurement of the F18(p,γ)Ne19 reaction. The strength of the 665 keV resonance (E=7.076 MeV) is found to be over an order of magnitude weaker than currently assumed in nova models. Reaction rate calculations show that this resonance therefore plays no significant role in the destruction of F18 at any astrophysical energy.

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JO - Physical Review Letters

JF - Physical Review Letters

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ER -

Measurement of radiative proton capture on F18 and implications for oxygen-neon novae

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