Neutron lethargy (logarithmic energy decrement)
Input(s)
\(E_{o}\): Initial Energy Level (eV)
E: Final Energy Level \((\mathrm{eV})\)
Output(s)
\(\mathrm{u}\): Neutron Lethargy (dimensionless)
Formula(s)
\[
u=\ln \left(\frac{E_{o}}{E}\right)
\]
Reference(s)
Bassiouni, Z., 1994, Theory, Measurement, and Interpretation of Well Logs. SPE Textbook Series Vol. 4. Chapter 2, Page: 38.