12C(α,γ)16O:: The key reaction in stellar nucleosynthesis

被引：0
|
作者：
Kunz, R [1 ]
Jaeger, M
Mayer, A
Hammer, JW
Staudt, G
Harissopulos, S
Paradellis, T
机构：
[1] Univ Stuttgart, Inst Strahlenphys, D-70569 Stuttgart, Germany
[2] Univ Tubingen, Inst Phys, D-72076 Tubingen, Germany
[3] NCSR Demokritos, Inst Nucl Phys, GR-15310 Athens, Greece
来源：
PHYSICAL REVIEW LETTERS | 2001年 / 86卷 / 15期
关键词：
D O I：
10.1103/PhysRevLett.86.3244
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The angular distributions of gamma rays from the C-12(alpha, gamma)O-16 reaction have been measured at 20 energy points in the energy range E-cm = 0.95 to 2.8 MeV. The sensitivity of the present experiment compared to previous direct investigations was raised by 1-2 orders of magnitude, by using an array of highly efficient (100%) Ge detectors shielded actively with BGOs, as well as high beam currents of up to 500 muA that were provided by the Stuttgart DYNAMITRON accelerator. The SE1 and SE2 factors deduced from the gamma angular distributions have been extrapolated to the range of helium burning temperatures applying the R-matrix method, which yielded S-E1(300) = (76 +/- 20) keV b and S-E2(300) = (85 +/- 30) keV b.
引用
收藏
页码：3244 / 3247
页数：4
相关论文
共 50 条
  • [1] A new study for 16O(γ,α)12C at the energies of nuclear astrophysics interest:: The inverse of key nucleosynthesis reaction 12C(α,γ)16O
    Xu, Y.
    Xu, W.
    Ma, Y. G.
    Guo, W.
    Chen, J. G.
    Cai, X. Z.
    Wang, H. W.
    Wang, C. B.
    Lu, G. C.
    Shen, W. Q.
    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2007, 581 (03): : 866 - 873
  • [2] Impact of 16O(γ, α)12C measurements on the 12C(α, γ)16O astrophysical reaction rate
    Holt, R. J.
    Filippone, B. W.
    Pieper, Steven C.
    PHYSICAL REVIEW C, 2019, 99 (05)
  • [3] The 12C(α, γ)16O reaction and its implications for stellar helium burning
    deboer, R. J.
    Gorres, J.
    Wiescher, M.
    Azuma, R. E.
    Best, A.
    Brune, C. R.
    Fields, C. E.
    Jones, S.
    Pignatari, M.
    Sayre, D.
    Smith, K.
    Timmes, F. X.
    Uberseder, E.
    REVIEWS OF MODERN PHYSICS, 2017, 89 (03)
  • [4] α-Spectroscopic factor of 16Ogs from the 12C(16O,12C)16O reaction
    Morais, M. C.
    Lichtenthaeler, R.
    NUCLEAR PHYSICS A, 2011, 857 (01) : 1 - 8
  • [5] Impact of 16O(e, e′ α)12C measurements on the 12C(α, γ)16O astrophysical reaction rate
    Holt, R. J.
    Filippone, B. W.
    PHYSICAL REVIEW C, 2019, 100 (06)
  • [6] Comments on the 12C(α, γ)16O reaction rate
    Buchmann, L
    NUCLEAR PHYSICS A, 2005, 758 : 355C - 362C
  • [7] Astrophysical reaction rate of 12C(α, γ)16O
    Kunz, R
    Fey, M
    Jaeger, M
    Mayer, A
    Hammer, JW
    Staudt, G
    Harissopulos, S
    Paradellis, T
    ASTROPHYSICAL JOURNAL, 2002, 567 (01): : 643 - 650
  • [8] The 12C(α,γ)16O reaction at astrophysical energies
    Braizinha, B
    Eiró, AM
    Santos, FD
    NUCLEAR PHYSICS A, 2001, 689 (1-2) : 369C - 372C
  • [9] Restrictions on the stellar 12C(α,γ)16O rate from elastic α-12C scattering
    Buchmann, L
    Tischhauser, P
    Azuma, RE
    Detwiler, R
    Giesen, U
    Görres, J
    Heil, M
    Hinnefeld, J
    Käppeler, F
    Kolata, JJ
    Schatz, H
    Shotter, A
    Stech, E
    Vouzoukas, S
    Wiescher, M
    NUCLEAR PHYSICS A, 2001, 688 (1-2) : 259C - 262C
  • [10] Measurement of the 12C(α,γ)16O reaction at TRIAC
    Makii, H.
    Miyatake, H.
    Wakabayashi, Y.
    Ishiyama, H.
    Niki, K.
    Okada, M.
    Imai, N.
    Watanabe, Y. X.
    Hirayama, Y.
    Jeong, S. C.
    Shima, T.
    Nishinaka, I.
    Mitsuoka, S.
    Nishio, K.
    Chiba, S.
    ORIGIN OF MATTER AND EVOLUTION OF GALAXIES 2011, 2012, 1484 : 269 - 274
12345