Energy Calibration The Schmitt Method

The relationship between the pulse height h and the kinetic energy T of a heavy ion was determined by Schmitt et al. to be of the form 

Absolute energy calibration is performed with the help of an accelerator. One measures the pulse heights of four monoenergetic beams of ions with known mass. Substitution of the known energy, mass, and pulse height into Eq. 

13 provides four equations with four unknowns that can be solved for the constants a, b, c, and d. 

For fission-fragment measurements, a relative calibration is used. The calibration constants of Eq. 13.13 are determined in terms of two pulse heights H and L of a fission-fragment spectrum (Fig. 13.19), where H and L represent pulse height corresponding to the mid-point at three-quarters maximum of the heavy or light fragment peak, respectively. The equations for the constants are 

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