New Astrophysical Reaction Rates for ^18F(P,α)^15O and ^18F(P,γ)^19Ne |
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引用本文: | 舒能川 D.W.Bardayan J.C.Blackmon 陈永寿 R.L.Kozub P.D.Parker M.S.Smith.New Astrophysical Reaction Rates for ^18F(P,α)^15O and ^18F(P,γ)^19Ne[J].中国物理快报,2003,20(9):1470-1473. |
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作者姓名: | 舒能川 D.W.Bardayan J.C.Blackmon 陈永寿 R.L.Kozub P.D.Parker M.S.Smith |
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作者单位: | [1]ChinaInstituteofAtomicEnergy,Beijing102413 [2]PhysicsDivision,OakRidgeNationalLaboratory,OakRidge,Tennessee37831,USA [3]PhysicsDepartment,TennesseeTechnologicalUniversity,Cookeville,Tennessee38505,USA [4]A.W.WrightNuclearStructureLaboratory,YaleUniversity,NewHaven,Connecticut06520,USA |
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摘 要: | The rates of the thermonuclear ^18F(P,α)^15O and ^18F(P,γ)^19Ne reactions in hot astrophysical environments are needed to understand gamma-ray emission from nova explosions. The rates for these reactions have been uncertain due to discrepancies in recent measurements, as well as to a lack of a comprehensive examination of the available structure information in the compound nucleus ^19Ne. We have examined the latest experimental measurements with radioactive and stable beams, and made estimates of the unmeasured ^19Ne nuclear level parameters, to generate new rates with uncertainties for these reactions. The rates are expressed as numerical values over the temperature range relevant for stellar explosions, as well as analytical expressions as functions of temperature in a format suitable for use in astrophysical simulations. Comparisons with the previous rate calculations are carried out, and the astrophysical implications are briefly discussed.
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关 键 词: | 天体物理学 反应速率 高热原子核反应 测量 铁18(P α)氧15 铁18(P γ)氖19 |
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