New low-energy measurement of the 18F(p,α)15O reaction

被引：0
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作者：
N. de Séréville
C. Angulo
A. Coc
N. L. Achouri
E. Casarejos
T. Davinson
P. Descouvemont
P. Figuera
S. Fox
F. Hammache
J. Kiener
A. Laird
A. Lefebvre
P. Leleux
P. Mumby-Croft
N. Orr
D. Robertson
K. Vaughan
V. Tatischeff
机构：
[1] CRC and FYNU,Department of Physics
[2] Université catholique de Louvain,undefined
[3] CSNSM Orsay,undefined
[4] IN2P3-CNRS,undefined
[5] LPC,undefined
[6] ISMRA and Université de Caen,undefined
[7] IN2P3-CNRS,undefined
[8] University of Santiago de Compostela,undefined
[9] School of Physics,undefined
[10] University of Edinburgh,undefined
[11] PNTPM,undefined
[12] Université Libre de Bruxelles,undefined
[13] Laboratori Nazionali del Sud,undefined
[14] University of York,undefined
[15] IPN Orsay,undefined
[16] IN2P3-CNRS,undefined
来源：
The European Physical Journal Special Topics | 2007年 / 150卷
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摘要：
The 18F, produced during nova explosions, is the main responsible for the 511 keV γ-ray emitted during the outburst that could be detected with satellite missions or future γ-ray telescopes. In spite of many experimental efforts, the amount of 18F synthesized still suffers from large uncertainties concerning mainly the 18F(p,α)15O reaction. We report here on a new direct measurement of the 18F(p,α)15O cross section recently carried out at the RIB facility at Louvain-la-Neuve. Cross section data down to a center-of-mass energy of 400 keV have been obtained using an isobarically pure 18F beam (averaged intensity of the order of 106 pps) and a thin polyethylene target. The reaction products were detected using the multi-strip detector array LEDA. The cross section data are analysed in the framework of the R-matrix model. Our main aim is to determine the interference sign between three 3/2+ resonances above threshold that can significantly affect the extrapolation of the 18F(p,α)15O cross section to the energies relevant for novae, and thus, the modeling of nova explosions.
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页码：211 / 214
页数：3
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