Davids B, Anthony D W, Aumann T, Austin S M, Baumann T, Bazin D, Clement R R, Davids C N, Esbensen H, Lofy P A, Nakamura T, Sherrill B M, Yurkon J
National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA.
Phys Rev Lett. 2001 Mar 26;86(13):2750-3. doi: 10.1103/PhysRevLett.86.2750.
A kinematically complete measurement was made of the Coulomb dissociation of 8B nuclei on a Pb target at 83 MeV/nucleon. The cross section was measured at low relative energies in order to infer the astrophysical S factor for the 7Be(p,gamma)8B reaction. A first-order perturbation theory analysis including E1, E2, and M1 transitions was employed to extract the E1 strength relevant to neutrino-producing reactions in the solar interior. By fitting the measured cross section from E(rel) = 130 to 400 keV, we find S17(0) = 17.8(+1.4)(-1.2) eV b.
在83 MeV/核子的能量下，对8B核在铅靶上的库仑解离进行了运动学完全测量。在低相对能量下测量了截面，以推断7Be(p,γ)8B反应的天体物理S因子。采用包括E1、E2和M1跃迁的一阶微扰理论分析，提取与太阳内部中微子产生反应相关的E1强度。通过拟合从E(rel)=130到400 keV的测量截面，我们得到S17(0)=17.8(+1.4)(-1.2)eV b。
