ATOMIC AND NUCLEAR PHYSICS
Yes, it is possible and it is called isotopes. In isotopes the
number of neutron is different but number of proton and electrons remain same
of a particular atom. Fusion reaction release more energy than fission. The energy
per nucleon is much greater in fusion than in fission. It has been estimated
that in this p-p chain reaction (proton-proton chain reaction), 25.7 MeV energy
is givenout i.e 6.4 MeV per nucleon energy is obtained which is much greater
than the energy given out per nucleon (1 MeV) during a fission reaction. Alpha
particle has the least penetrating power. Beta is next and gamma has most
penetrating power. Gamma Ray is charged less and mass less photon that’s why
they have more penetrating power than alpha particle which have charge and mass
and interact with matter so have less penetrating power.
In natural radioactivity, atomic nuclei want to become stable that’s
why they cmit some radiations and such atoms are called radioactive and the
process is called natural radioactivity. In artificial radioactivity the nuclei
which are not excited but we excite those bombarding neutrons or protons and
after excitation of nuclei the atom become radioactive and cmit radiation this
is called artificial radioactivity. Theoretically it will take an infinite time
to decay completely because it radioactivity follow the exponential law. If gamma
ray emit from the excited nucleus than only energy of the nucleus releases but
atomic number and atomic mass remain same. Amount of sample of pure radioactive
matter = 1g
After 1st half life I 1t1/2 = ½ 0.5g
After 1st half life 2t ½ =0.5/2 = 0.25g
After 1st half life 3t ½ = 0.25/2 0.25g
After 1st half life 4t ½ =0.125/2 0.0625g
Motivations,Information,Knowledge, Tips & Tricks, Solution,
Business idea,News,Article,Islamic, Make Money,How to,Urdu/Hindi,
top,Successes,SEO,Online Earning
No comments:
Post a Comment