Mass absorption (attenuation) coefficient
Input(s)
\(\mathrm{N}\): Number of Atoms per Unit Volume \(\left(\boldsymbol{m}^{-\mathbf{3}}\right)\)
\(\sigma\): Thin Cross Section Expressed in Barns per Atom (1 barn is \(\mathbf{1 0}^{-\mathbf{2 8}} \boldsymbol{m}^{\mathbf{2}}\) ) ( \(\boldsymbol{m}^{\mathbf{2}} /\) atom \()\)
\(\rho\): Density \(\left(\mathrm{kg} / \mathrm{m}^{3}\right)\)
Output(s)
\(\boldsymbol{\alpha}_{\boldsymbol{l}}\): Linear Absorption Coefficient \((1 / \mathrm{m})\)
\(\boldsymbol{\alpha}_{\boldsymbol{m}}\): Mass Absorption Coefficient \(\left(\mathrm{m}^{2} / \mathrm{kg}\right)\)
Formula(s)
\[
\begin{gathered}
\alpha_{l}=\sigma * N \\
\alpha_{\mathrm{m}}=\frac{\alpha_{1}}{\rho}
\end{gathered}
\]
Reference(s)
Bassiouni, Z., 1994, Theory, Measurement, and Interpretation of Well Logs. SPE Textbook Series Vol. 4. Chapter 2, Page: 33-34.