7. Discovery of neutron
Sir James Chadwick
(20 October 1891 – 24 July 1974) was
an English physicist who was
awarded the 1935 Nobel Prize in
Physics for his discovery of the
neutron in 1932. In 1941, he wrote
the final draft of the MAUD Report,
which inspired the U.S. government
to begin serious atomic bomb
research efforts. He was the head of
the British team that worked on the
Manhattan Project during the
Second World War. He was knighted
in England in 1945 for his
achievements in physics.
9. Introduction
Neutrons
Neutron was discovered by
sir James Chadwick in the
year of 1932.
Neutron was present in
nucleus.
Neutron was same mass
and size of proton.
But it is neutrally charged.
10. History
1930 Bothe & Becker
performed an expt.
Neutron is neutral and
causes no ionization
and cannot be detected
in a cloud chamber
11. Chadwick smashed alpha
particles into beryllium, a rare
metallic element, and allowed
the radiation that was released to
hit another target: paraffin wax.
The experiment results showed a
collision with beryllium atoms
would release massive neutral
particles, which Chadwick
named neutrons.
DISCOVERY OF NEUTRONS
Neutrons
12. Nuclear Properties
Atomic masses are denoted by the symbol u.
1 u = 1.66054 × 10−27 kg = 931.49 MeV/c2
Both neutrons and protons, collectively called
nucleons, are constructed of other
particles called quarks.
