$^{8}$Li Generic Calibration Source

The $^{8}$Li calibration source consists of three regions:-

• Region IDRG_ICALI_LI8_CAN, either a sphere or a cylinder, representing the outer cannister which encloses the source. It is deployed and described in titles banks GEDP 170 and GEDS 170.
• Region IDRG_ICALI_LI8_CATH, either a sphere or a cylinder, representing the cathode which is embedded in the outer cannister. It is deployed and described in titles banks GEDP 172 and GEDS 172.
• Region IDRG_ICALI_LI8_GAS, either a sphere or a cylinder, representing the inner gas volume which acts as a decay chamber for the $^{8}$Li, and which is embedded in the cathode. It is deployed and described in titles banks GEDP 174 and GEDS 174.

User Control

The user control of this source is identical to that of the generic inner calibration source, except that there are now THREE embedded regions, and all three must be of the same type, i.e. three spheres or three cylinders. The default specification of the geometry is as follows :-

Region	Medium	Cylinder Radius	Cylinder Half Height
LI8_CAN	Stainless Steel	1.17 cm	50.0 cm
LI8_CATH	Stainless Steel	1.105 cm	50.0 cm
LI8_GAS	Air	1.105 cm	50.0 cm

To set off $^{8}$LI events within this source use the command file: calibration_8li_generic.cmd