【摘要】 用共面的三个γ射线探测器的三重符合来选择正、负电子三光子湮灭事例,并用康普顿散射方法对其中一个光子的线极化进行了测量.在三光子湮灭的两种几何条件下（α₁=α₂=α₃=120°,E_r=341keV和α₂=α₃=135°,α₁=90°.E_r=423keV）测量平行和垂直于三光子湮灭平面的康普顿散射光子数之比分别为1.82±0.06和1.53±0.08,由此得到以三光子湮灭平面为参考平面时,光子的线极化度分别为0.56±0.04和0.40±0.09.更多还原

【Abstract】 The gamma rays emitted from three photon annihilation of positrons and electrons wereselected with a triple coincidence method and the linear polarization of one of the three photonswas investigated by using Compton scattering.Under two geometric conditions of three photonsannihilation （α₁=α₂=α₃=120° and α₁=90°,α₂=α₃=135°）,the ratio of the scattered photonswhich were parallel with the annihilation plane to those perpendicular with the annihilationplane were 1.82 ±0.06 and 1.53 ±0.08,thus the linear polarization of the photons to the annihila-tion plane were 0.56±0.04 and 0.40±0.09.更多还原