Table 3.

A summary of the $\alpha$ energy response models studied. $f_e$ and $f_h$ are the fraction of the electron and electron-hole charge collection signals that contribute to the prompt event energy, and d is the dead layer thickness

E model	Free param.	Fixed param.
1	None	$f_e=1,f_h=1,d=0\mathrm{\mu }$m
1d	None	$f_e=1,f_h=1,d=3.5\mathrm{\mu }$m
2	$f_h,f_e$	$d=0\mathrm{\mu }$m
2d	$f_h,f_e,d$	None
3	$f_h$	$f_e=0,d=0\mathrm{\mu }$m
3d	$f_h,d$	$f_e=0$
4	None	$f_h=1,f_e=0,d=0\mathrm{\mu }$m
4d	None	$f_h=1,f_e=0,d=3.5\mathrm{\mu }$m