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Klein�E�m‰È‚ÌŽ®‚ÌŒvŽZ(90�‹ŽU—�ŒÀ’è)

Klein�E�m‰È‚ÌŽ®($\theta \approx 90^\circ$‚ÌŽž)
$\left. \frac{d \sigma}{d \Omega} \right|_{ \theta = 90 ^{ \circ } }= \frac{1}{2} Zr_e^2\left(\frac{1}{1 + \alpha}\right)^2 \left\{1+\frac{\alpha^2}{(1+\alpha) }\right\}$
$\alpha=\frac{E_\gamma}{m_e c^2}$
‚ðŒvŽZ‚µ‚Ü‚·�B


�ðŒ�“ü—Í
$E_\gamma$ [MeV]
$Z$ (•W“I‚ÌŒ´Žq”Ô�†)



Œ‹‰Ê
$\frac{d \sigma}{d \Omega}$ [barn/str] (1barn=10^-24cm^2)