Mod-01 Lec-01 -Brief Overview of the course

So, this is our nuclear physics course and this course is being recorded at a very important time. You know nuclear physics is started with few experiments and some theoretical modeling and we have just completed hundred years of that. So, this is an auspicious occasion, to start this particular course. As you know all the matter is composed of atoms and atoms

are made of protons, neutrons and electrons. All these protons and neutrons are in a small volume which we call nucleus and electrons go around that. So, but how people came to know about this so, as I said hundred years ago it was nineteen hundred and nine and two gentlemen Geiger and Marsden. They did some experiments. The

experiments were, alpha particles were bombarded on some metals and then some of the alpha particles came back to towards the source itself, that means the scattering was ninety degrees, which we will call back scattering. So,, some foil was there I will show you a slide. The foil, some foil was there a metal foil and alpha particles were going and these alpha

particles interacted with these atoms here and then they came back, some of them. Most of them were going in the forward direction, but some of them came back and from there it all started. So, I will just show you a slide, which I have on the power point where the diagram that is published in that particular paper that is there. You will come to see

how that experiment in nineteen hundred and nine was performed. So, here it is you can see this slide here and it is the title of the thing was on a diffused reflection of the alpha particle. It was published in proceedings of royal societies in 1909 A, volume 82 page 459 to 95 to 500, by these people Geiger and E Marsden. This