Indirect study of the astrophysically important <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow></mrow><mrow><mn>15</mn></mrow></msup></mrow><mi mathvariant="normal">O</mi><mo>(</mo><mi>α</mi><mo>,</mo><mi>γ</mi><mrow><msup><mrow><mo>)</mo></mrow><mrow><mn>19</mn></mrow></msup></mrow><mi mathvariant="normal">Ne</mi></math></span> reaction through <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow></mrow><mrow><mn>2</mn></mrow></msup></mrow><mi mathvariant="normal">H</mi><mrow><msup><mrow><mo>(</mo></mrow><mrow><mn>18</mn></mrow></msup></mrow><mi mathvariant="normal">Ne</mi><mrow><msup><mrow><mo>,</mo></mrow><mrow><mn>19</mn></mrow></msup></mrow><mi mathvariant="normal">Ne</mi><mrow><msup><mrow><mo>)</mo></mrow><mrow><mn>1</mn></mrow></msup></mrow><mi mathvariant="normal">H</mi></math></span>

A. M. Laird; S. Cherubini; A. N. Ostrowski; M. Aliotta; T. Davinson; A. Di Pietro; P. Figuera; W. Galster; J. S. Graulich; D. Groombridge; J. Hinnefeld; M. Lattuada; P. Leleux; L. Michel; A. Musumarra; A. Ninane; M. G. Pellegriti; A. C. Shotter; Spitaleri; A. Tumino; J. Vervier; P. Woods

doi:10.1103/PhysRevC.66.048801

Indirect study of the astrophysically important $^{15} O (α, γ)^{19} Ne$ reaction through $^{2} H (^{18} Ne,^{19} Ne)^{1} H$

A. M. Laird, S. Cherubini, A. N. Ostrowski, M. Aliotta, T. Davinson, A. Di Pietro, P. Figuera, W. Galster, J. S. Graulich, D. Groombridge, J. Hinnefeld, M. Lattuada, P. Leleux, L. Michel, A. Musumarra, A. Ninane, M. G. Pellegriti, A. C. Shotter, Spitaleri, A. Tumino, J. Vervier, and P. Woods

Phys. Rev. C 66, 048801 – Published 29 October 2002

Abstract

The $^{15} O (α, γ)^{19} Ne$ reaction is generally considered as a potential breakout reaction from the hot CNO cycle. Under nova conditions, the reaction rate is dominated by a single sub-Coulomb resonance at $E_{c . m .} = 504 keV$ which corresponds to a $^{19} Ne$ excitation energy of $E_{R} = 4.033 MeV .$ Results from a ${d (}^{18} Ne,^{19} Ne) p$ experiment show that states of astrophysical interest are populated in this reaction. An upper limit for the $α$ -branching ratio of the 4.033 MeV state was identified and branching ratios for other states in $^{19} Ne$ were found to be in good agreement with stable beam based results.

Received 3 July 2002

DOI:https://doi.org/10.1103/PhysRevC.66.048801

Authors & Affiliations

A. M. Laird^1,*, S. Cherubini^2,†, A. N. Ostrowski^1,‡, M. Aliotta^3,§, T. Davinson¹, A. Di Pietro^1,∥, P. Figuera³, W. Galster^2,¶, J. S. Graulich², D. Groombridge^1,**, J. Hinnefeld^2,††, M. Lattuada³, P. Leleux², L. Michel², A. Musumarra^2,∥, A. Ninane², M. G. Pellegriti³, A. C. Shotter^1,*, Spitaleri³, A. Tumino³, J. Vervier², and P. Woods¹

¹Department of Physics & Astronomy, University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom
²Institut de Physique Nucléaire, Université Catholique de Louvain, Louvain-la-Neave Belgium
³INFN-Laboratori Nazionali del Sud and Universitá di Catania, Catania, Italy

^*Present address: TRIUMF, Vancouver, Canada.
^†Present address: EP3, Ruhr-Universität-Bochum, Bochum, Germany.
^‡Present address: University of Mainz, Mainz, Germany.
^§Present address: University of Edinburgh, Edinburgh, UK.
^∥Present address: INFN-Laboratorio Nazionale del Sud, Catania, Italy.
^¶Present address: Tohoku University, Sendai, Japan.
^**Present address: University of York, York, UK.
^††Present address: University of Indiana, South Bend, Indiana.

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Vol. 66, Iss. 4 — October 2002

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