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物質構造科学特論 - KEK
Guiner近似 André Guinier (1911-2000: フラ ンス人) 形状因子F(Q)をマクローリン展開し、2次の項まで考慮した近似。 F(Q)2∝ b k exp(−iQ⋅X k) k=1 N ∑ 2 =4πb k 2sin(QX k) =1 QX k N ∑ 2 ≈4πb2 1− Q2X k 2 3 +! ⎛ ⎝ ⎜ ⎞ ⎠ ⎟ k=1 N ∑ =4πb2 N− Q2X k 2 3
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