Resonance strengths in the 14N(p,γ)15O and 15N(p,αγ)12C reactions

被引：33

作者：

Marta, Michele ^{[1
]}

Trompler, Erik ^{[1
]}

Bemmerer, Daniel ^{[1
]}

Beyer, Roland ^{[1
]}

Broggini, Carlo ^{[2
]}

Caciolli, Antonio ^{[2
]}

Erhard, Martin ^{[2
]}

Fulop, Zsolt ^{[3
]}

Grosse, Eckart ^{[1
]}

Gyurky, Gyorgy ^{[3
]}

Hannaske, Roland ^{[1
]}

Junghans, Arnd R. ^{[1
]}

Menegazzo, Roberto ^{[2
]}

Nair, Chithra ^{[1
]}

Schwengner, Ronald ^{[1
]}

Szucs, Tamas ^{[1
,3
]}

Vezzu, Simone ^{[4
]}

Wagner, Andreas ^{[1
]}

Yakorev, Dmitry ^{[1
]}

机构：

[1] Forschungszentrum Dresden Rossendorf FZD, Dresden, Germany

[2] Ist Nazl Fis Nucl, Sez Padova, Padua, Italy

[3] Inst Nucl Res ATOMKI, Debrecen, Hungary

[4] Coordinamento Interuniv Veneto Nanotechnol CIVEN, Venice, Italy

来源：

PHYSICAL REVIEW C | 2010年 / 81卷 / 05期

关键词：

CROSS-SECTION; ENERGY-LEVELS; SOLAR MODELS; LIGHT-NUCLEI; S-FACTOR; N-14(P; GAMMA)O-15; ABUNDANCE; STANDARD; NITROGEN;

D O I：

10.1103/PhysRevC.81.055807

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

The N-14(p,gamma)O-15 reaction is the slowest reaction of the carbon-nitrogen-oxygen cycle of hydrogen burning in stars. As a consequence, it determines the rate of the cycle. The N-15(p,alpha gamma)C-12 reaction is frequently used in inverse kinematics for hydrogen depth profiling in materials. The N-14(p,gamma)O-15 and N-15(p,alpha gamma)C-12 reactions have been studied simultaneously, using titanium nitride targets of natural isotopic composition and a proton beam. The strengths of the resonances at E-p = 1058 keV in N-14(p,gamma)O-15 and at E-p = 897 and 430 keV in N-15(p,alpha gamma)C-12 have been determined with improved precision, relative to the well-known resonance at Ep = 278 keV in N-14(p,gamma)O-15. The new recommended values are omega gamma = 0.353 +/- 0.018, 362 +/- 20, and 21.9 +/- 1.0 eV for their respective strengths. In addition, the branching ratios for the decay of the E-p = 1058 keV resonance in N-14(p,gamma)O-15 have been redetermined. The data reported here should facilitate future studies of off-resonant capture in the N-14(p,gamma)O-15 reaction that are needed for an improved R-matrix extrapolation of the cross section. In addition, the data on the 430 keV resonance in N-15(p,alpha gamma)C-12 may be useful for hydrogen depth profiling.

引用

页数：10

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