Nuclear = “A-Bomb” and Thermonuclear = “H-Bomb” IIRC. BTW, I believe the “trigger” on an “H-Bomb” that gets the ball rolling is a built-in “A-Bomb” inside. Any physicists here can confirm that or correct me.
Yep.
The X-ray and gamma ray pulse from the primary compresses the secondary, initiating a fusion reaction, which amplifies the yield considerably.
Fat Man had a “soccer ball” type trigger- HE in a ball shape imploding the core to compress and start the reaction.
Little Boy was a “cannon” type- a tube with the nuke material being driven like a piston to initiate.
Maybe OM can tell us the answer to Your question.
As long as you don’t call it an ‘Atomic Bomb’ - a truly useless designation.