[spunkets]

Neutrons are not usually found from a decay process. They are produced commonly by reactions. neutrons and detection of same

A geiger counter, or geiger tube is used to detect alpha, beta and gamma rad. geiger tube

Thermal (slow moving) neutrons from reactions are collected by metals like cadmium and nonmetals like carbon(carbon pile reactor(Chernobyl)). Those are the control rod materials.

[Dog]

In engish, spunket..

[crypt2k]

I suspect that any radioactive contraband was tossed over
the side on entering the bay. FBI should check deep-diving salvage schools for suspect students.