What was the year and location of james chadwick's experiment?

In the year of 1932 James Chadwick conducted a series

of experiments that would change the world of science forever.

Although we now know that there are protons, neutrons, and

electrons in an atom. In Chadwick's time most of this was

still being experimented upon. In the beginning the

experiments he did were to prove that if alpha particles

(two protons and two neutrons bound together) fell on light

elements such as beryllium, boron, and lithium gamma radiation

(A type of radioactive decay that has the shortest wavelength

but it is the most energetic form of decay) would not be the

result. Chadwick's hypothesis was correct, it wasn't gamma

radiation but rather a beam of neutrons.