"If we ascribe the ejection of the proton to a Compton recoil from a quantum of 52 x 106 electron volts, then the nitrogen recoil atom arising by a similar process should have an energy not greater than about 400,000 volts, should produce not more than about 10,000 ions, and have a range in the air at N.T.P. of about 1-3mm. Actually, some of the recoil atoms in nitrogen produce at least 30,000 ions. In collaboration with Dr. Feather, I have observed the recoil atoms in an expansion chamber, and their range, estimated visually, was sometimes as much as 3mm. at N.T.P.
These results, and others I have obtained in the course of the work, are very difficult to explain on the assumption that the radiation from beryllium is a quantum radiation, if energy and momentum are to be conserved in the collisions. The difficulties disappear, however, if it be assumed that the radiation consists of particles of mass 1 and charge 0, or neutrons. The capture of the a-particle by the Be9 nucleus may be supposed to result in the formation of a C12 nucleus and the emission of the neutron. From the energy relations of this process the velocity of the neutron emitted in the forward direction may well be about 3 x 109 cm. per sec. The collisions of this neutron with the atoms through which it passes give rise to the recoil atoms, and the observed energies of the recoil atoms are in fair agreement with this view. Moreover, I have observed that the protons ejected from hydrogen by the radiation emitted in the opposite direction to that of the exciting a-particle appear to have a much smaller range than those ejected by the forward radiation.
This again receives a simple explanation on the neutron hypothesis."
Take from that what you will.
attitude of james chadwick
James Chadwick discovered neutrons in 1932.
James Chadwick was born on October 20, 1891.
James Chadwick was born on October 20, 1891.
james chadwick discovered the neutron in 1932
James chadwick was the discoverer of neutron. He gave the famous neutron reaction.
James chadwick discovered neutrons in1932.
James Chadwick is credited as the discoverer of neutrons.
The experimental proof of the neutron was provided by James Chadwick in 1932.1932 by James Chadwick, having been therorised by Ernest Rutherford in 1920.neutron discovered by Chadwick in 1932
The neutron was discovered by James Chadwick in 1932.
James Chadwick died on July 24, 1974 at the age of 82.
James Chadwick won The Nobel Prize in Physics in 1936.