James Chadwick and the NeutronBy Jake Samson & Shai Zimmerman

Who is James Chadwick?

Born: October 20, 1891 Bollington, England

Death: July 24, 1974 (Age 82) Cambridge, England

Spouse: Aileen Stewart- BrownDaughter: Joanna Stewart Chadwick BatterhamDaughter: Judith Chadwick

Who is James Chadwick?

Most significant work done: Cavendish Laboratory, Cambridge

Colleagues: Ernest Rutherford

E.S Bieler

Rivals: None

- Rutherford

AchievementsGraduated from Honours School of Physics

Manhattan Project Development of atomic bombs

1932: Made fundemental discovery! Existence of the NEUTRON!!!! (particle in an atom without electrical charge)

Added nitrogen to alpha particles with emission of a proton

First artificial nuclear transformation

Manhattan Project

Atomic disentegration does NOT need to overcome an electric barrier.

Can penetrate and split heaviest elements

Fission of Uranium- 235 created atom bomb

Discovery of the Neutron Chadwick’s set-up an experiment discovering neutrons

-alpha particles are projected towards a beryllium target

-the emitted particles fell on an object called paraffin wax

-once it fell on the paraffin wax, it released another type of particles

-that other type of particles were protons

-what went through the beryllium target were uncharged and had a similar mass to protons…called NEUTRONS

Chadwick Diagram

Awards

Knighted in 1945

Other famous Knights

Sir Sean Connery

(James Bond)

Sir Elton John

Sir Paul McCartney

Awards Continued

Hughes Medal of Royal Society

1935 Nobel Prize in physics

The Most Important Thing About the Discovery of the Neutron?

Without it, there would be no…

Jimmy Neutron!