Shining child question

[carborundum]

So I've an 11th level evil party, including a vampire and a dread ghoul (Way of the Wicked). I'm thinking of putting them up against a shining child, but need a spot of clarification.

Burning Touch says "A shining child corrupts the positive energy within a living creature into an unnatural burning light." Would undead be immune to this?

[Adjoint]

I'd say yes. But on the other hand, they would take double damage from the Searing Ray, that is total of 20d6 fire damage on a ranged touch attack with +19 to hit. They can be killed with a single attack.

[carborundum]

Perfect! It's about time they had a challenge :))

(The vampire will have a load of temp hitpoints, the ghoul will be at least blurred)