Publication of the Paper! The Academic World Shaken! The Mystery of Atomic Composition Finally Solved! Another Holy Land of Nuclear Physics Emerges!

Cavendish Laboratory.

With Christmas drawing near, everyone in the laboratory wore smiles on their faces.

There was not only the joy of the coming holiday, but also pride in the laboratory's achievements.

Over the past year, Cavendish had been utterly unrivaled in the field of physics.

Many had even called it "the center of Nuclear Physics."

It made the teachers and students marvel that they had been born into such a fine age.

The "gloom" of Quantum Mechanics had finally dispersed. It was experimental physics's turn to shine.

At that moment, Chadwick was alone in his small laboratory.

His senior, Geiger, had been gone for more than ten days.

Only today did he recall that Geiger had once suggested an improved experiment concerning Beryllium Rays.

He decided he might as well carry out the experiment before the holiday, if only to give Geiger an answer.

Though Chadwick respected Geiger greatly, he also knew that Geiger was still a fair distance from the forefront of Nuclear Physics.

Thus, he had not placed much hope in this experiment. He was merely doing it for fun.

Cavendish's equipment was beyond compare with that of other laboratories.

Chadwick quickly assembled the apparatus.

Following Geiger's suggestion, he replaced the Geiger Counter with a Cloud Chamber.

Professor Wilson had personally helped design this Cloud Chamber, and it was exceptionally advanced.

Chadwick muttered to himself with a smile:

"Though the chances are slim."

"I still hope Christmas brings me some good luck."

With that, he activated the apparatus.

Beep!

The Alpha Rays emitted by the radioactive material bombarded the Beryllium, producing the so-called Beryllium Rays.

Next, Chadwick guided the Beryllium Rays into the Cloud Chamber.

A few minutes later, when he developed the first photograph of the tracks—

"Hm?"

"Why does the thickness of this track look