This presentation will change your point of view about fundamentals of atomic structures and particle physics.

1. By
Logesh K

2. Matter
Anything that has mass and occupy volume in space
Example : Proton , Electron, etc,.

3. Anti-Matter
 Anti-particles combines to form Anti-matter
 It has same mass as the corresponding matter
has but has different in charge and in quantum
numbers
 Example : Positron (anti-electron), Anti-proton

4. Production of Anti-Matter
 Produced by the collision of cosmic rays and some radioactive
decays
 Only few nanograms can be produced artificially due to the
cost and difficulty in synthesizing.

5. Annihilation
 The Collision between matter and its corresponding
anti-matter results in Annihilation.
 This produces photons (Gamma-rays), neutrinos and
some Particle- Antiparticle pairs.
 Example : Electron colloids with positron to form
two photons.

7. Positrons
 Positrons were reported in November 2008
 These are generated by Lawrence Livermore National
Laboratory in larger numbers than by any previous
synthetic process.

9. Synthesis of Positron
 A laser drove electrons through a gold target's nuclei
 This caused the incoming electrons to emit energy.
 That decayed into both matter and antimatter.
 Positrons were detected at a higher rate and in
greater density than ever previously detected in a
laboratory.

10. Anti- protons
 The existence of the antiproton was experimentally
confirmed in 1955 by University of California.
Berkeley physicists Emilio Segrè and Owen Chamberlain
were awarded 1959 Nobel Prize in Physics for this.
 An antiproton consists of two up anti-quarks and one
down anti-quark.
 Anti-proton having opposite electric charge & magnetic
moment from the proton.

11. Proton with
2 up quarks &
1 down quark
Anti-proton with
2 up anti-quarks &
1 down anti-quark

12. Anti-neutrons
 In 1956, the antineutron was discovered in
proton–proton collisions at Lawrence Berkeley National
Laboratory by Bruce Cork and colleagues.

13. Anti-Hydrogen Atom
 In 1995, CERN announced that it had successfully brought
into existence anti-hydrogen atoms by implementing the
SLAC concept during the PS210 experiment.
 The experiment was performed using the Low Energy
Antiproton Ring (LEAR)

14. Heavier anti-atoms
 Larger antimatter atoms such as Anti-deuterium
and Anti-tritium are much more difficult to produce.
 Anti-deuterium, Antihelium-3 and Anti-helium-4
nuclei have been produced with several technical
hurdles.

15. FOR LISTENING !!!