Study of interference effects in the 18F(p, α) 15O reaction

K. Y. Chae; M. W. Guidry; C. D. Nesaraja; Z. Ma; D. W. Bardayan; J. C. Blackmon; M. S. Smith; D. Gregory; R. L. Kozub; S. Paulauskas; J. F. Shriner; N. Smith; M. S. Johnson; R. J. Livesay; M. Porter-Peden; S. D. Pain; J. S. Thomas

Study of interference effects in the ¹⁸F(p, α) ¹⁵O reaction

K. Y. Chae, M. W. Guidry, C. D. Nesaraja, Z. Ma, D. W. Bardayan, J. C. Blackmon, M. S. Smith, D. Gregory, R. L. Kozub, S. Paulauskas, J. F. Shriner, N. Smith, M. S. Johnson, R. J. Livesay, M. Porter-Peden, S. D. Pain, J. S. Thomas

Nuclear Structure and Nuclear Astrophysi

Research output: Contribution to journal › Conference article › peer-review

Abstract

The ¹⁸F(p,α)¹⁵O reaction plays a crucial role in understanding g -ray emission from novae. Because of the importance of understanding the ¹⁸F + p reactions, a number of studies of the A=19 isobars have been made using stable and exotic beams. The interference effects among Jp = 3/2 ⁺ resonances in the ¹⁸F + p system, however, have never been measured, but they can change the S-factor by a factor of 20 at nova energies. R-matrix calculations indicate that the cross sections above the E_c.m. = 665 keV resonance are sensitive to the interference between the E^c.m. = 8, 38, and 665 keV resonances. In order to study the interference effects, an excitation function for the ¹H( ¹⁸F,α)¹⁵O reaction has been measured in the energy range of E_c.m. = 663-877 keV using radioactive 18F beams at the Holifield Radioactive Ion Beam Facility. By measuring the ¹⁸F(p, α)15O cross section off resonance and comparing the cross section with theoretical calculations, we provide the first experimental constraints on the interference of 3/2 + resonances.

Original language	English
Journal	Proceedings of Science
State	Published - 2006
Event	9th International Symposium on Nuclear Astrophysics - Nuclei in the Cosmos, NIC 2006 - Geneva, Switzerland Duration: Jun 25 2006 → Jun 30 2006

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@article{d8c402c38276452b8b989dbc13ac565b,

title = "Study of interference effects in the 18F(p, α) 15O reaction",

abstract = "The 18F(p,α)15O reaction plays a crucial role in understanding g -ray emission from novae. Because of the importance of understanding the 18F + p reactions, a number of studies of the A=19 isobars have been made using stable and exotic beams. The interference effects among Jp = 3/2 + resonances in the 18F + p system, however, have never been measured, but they can change the S-factor by a factor of 20 at nova energies. R-matrix calculations indicate that the cross sections above the Ec.m. = 665 keV resonance are sensitive to the interference between the Ec.m. = 8, 38, and 665 keV resonances. In order to study the interference effects, an excitation function for the 1H( 18F,α)15O reaction has been measured in the energy range of Ec.m. = 663-877 keV using radioactive 18F beams at the Holifield Radioactive Ion Beam Facility. By measuring the 18F(p, α)15O cross section off resonance and comparing the cross section with theoretical calculations, we provide the first experimental constraints on the interference of 3/2 + resonances.",

author = "Chae, {K. Y.} and Guidry, {M. W.} and Nesaraja, {C. D.} and Z. Ma and Bardayan, {D. W.} and Blackmon, {J. C.} and Smith, {M. S.} and D. Gregory and Kozub, {R. L.} and S. Paulauskas and Shriner, {J. F.} and N. Smith and Johnson, {M. S.} and Livesay, {R. J.} and M. Porter-Peden and Pain, {S. D.} and Thomas, {J. S.}",

year = "2006",

language = "English",

journal = "Proceedings of Science",

issn = "1824-8039",

publisher = "Sissa Medialab",

note = "9th International Symposium on Nuclear Astrophysics - Nuclei in the Cosmos, NIC 2006 ; Conference date: 25-06-2006 Through 30-06-2006",

}

TY - JOUR

T1 - Study of interference effects in the 18F(p, α) 15O reaction

AU - Chae, K. Y.

AU - Guidry, M. W.

AU - Nesaraja, C. D.

AU - Ma, Z.

AU - Bardayan, D. W.

AU - Blackmon, J. C.

AU - Smith, M. S.

AU - Gregory, D.

AU - Kozub, R. L.

AU - Paulauskas, S.

AU - Shriner, J. F.

AU - Smith, N.

AU - Johnson, M. S.

AU - Livesay, R. J.

AU - Porter-Peden, M.

AU - Pain, S. D.

AU - Thomas, J. S.

PY - 2006

Y1 - 2006

N2 - The 18F(p,α)15O reaction plays a crucial role in understanding g -ray emission from novae. Because of the importance of understanding the 18F + p reactions, a number of studies of the A=19 isobars have been made using stable and exotic beams. The interference effects among Jp = 3/2 + resonances in the 18F + p system, however, have never been measured, but they can change the S-factor by a factor of 20 at nova energies. R-matrix calculations indicate that the cross sections above the Ec.m. = 665 keV resonance are sensitive to the interference between the Ec.m. = 8, 38, and 665 keV resonances. In order to study the interference effects, an excitation function for the 1H( 18F,α)15O reaction has been measured in the energy range of Ec.m. = 663-877 keV using radioactive 18F beams at the Holifield Radioactive Ion Beam Facility. By measuring the 18F(p, α)15O cross section off resonance and comparing the cross section with theoretical calculations, we provide the first experimental constraints on the interference of 3/2 + resonances.

AB - The 18F(p,α)15O reaction plays a crucial role in understanding g -ray emission from novae. Because of the importance of understanding the 18F + p reactions, a number of studies of the A=19 isobars have been made using stable and exotic beams. The interference effects among Jp = 3/2 + resonances in the 18F + p system, however, have never been measured, but they can change the S-factor by a factor of 20 at nova energies. R-matrix calculations indicate that the cross sections above the Ec.m. = 665 keV resonance are sensitive to the interference between the Ec.m. = 8, 38, and 665 keV resonances. In order to study the interference effects, an excitation function for the 1H( 18F,α)15O reaction has been measured in the energy range of Ec.m. = 663-877 keV using radioactive 18F beams at the Holifield Radioactive Ion Beam Facility. By measuring the 18F(p, α)15O cross section off resonance and comparing the cross section with theoretical calculations, we provide the first experimental constraints on the interference of 3/2 + resonances.

UR - http://www.scopus.com/inward/record.url?scp=84887453015&partnerID=8YFLogxK

M3 - Conference article

AN - SCOPUS:84887453015

SN - 1824-8039

JO - Proceedings of Science

JF - Proceedings of Science

T2 - 9th International Symposium on Nuclear Astrophysics - Nuclei in the Cosmos, NIC 2006

Y2 - 25 June 2006 through 30 June 2006

ER -

Study of interference effects in the ¹⁸F(p, α) ¹⁵O reaction

Abstract

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