O-18(P,ALPHA)N-15 REACTION AT STELLAR ENERGIES

被引：92

作者：

LORENZWIRZBA, H ^{[1
]}

SCHMALBROCK, P ^{[1
]}

TRAUTVETTER, HP ^{[1
]}

WIESCHER, M ^{[1
]}

ROLFS, C ^{[1
]}

RODNEY, WS ^{[1
]}

机构：

[1] NATL SCI FDN,WASHINGTON,DC 20550

来源：

NUCLEAR PHYSICS A | 1979年 / 313卷 / 03期

关键词：

Nuclear reaction;

D O I：

10.1016/0375-9474(79)90505-0

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 18O(p, α)15N reaction has been investigated in the energy range Ep = 72-935 keV. The three known resonances above Ep = 620 keV have been confirmed and four new resonances have been found below Ep = 340 keV. All observed resonances correspond to known compound states in 19F. Information on resonance energies, total widths and ωγ values is reported. The low-energy resonances are superimposed on a non-resonant reaction yield, which varies smoothly with beam energy and which exhibits pronounced α-particle angular distributions asymmetric around 90°. The explanation of these data requires either interferring amplitudes of broad resonances with differing parities or a direct (p, α) reaction mechanism. The investigated energy range corresponds to the important temperature range of T = (0.05-2.5) × 109 K. The energy averaged astrophysical reaction rates are compared with predictions. © 1979.

引用

页码：346 / 362

页数：17

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