• 𝐏𝐎𝐒𝐈𝐓𝐑𝐎𝐍 𝐀𝐍𝐃 𝐈𝐓’𝐒 𝐃𝐈𝐒𝐂𝐎𝐕𝐄𝐑𝐘….!!
“Positron” is a part of matter which means; it is a sub-atomic particle. “Positron” is also known as ‘Anti-Electron’ or ‘Positive Electron’. Well, there is a very simple or genuine reason is there behind both of these names of “Positron”. “Positron” possesses the mass and the charge exact same as the sub-atomic particle ‘Electron’. The only difference between a “Positron” and an ‘Electron’ is that; an ‘Electron’ possesses a negative charge whereas the “Positron” possesses a positive charge. The combination of an electron and a positron results in an annihilation which transforms both particles into high-energy photons.
The existence of the Anti-Particle,”Positron” was predicted by Paul Dirac in 1928. It was later discovered by an American physicist Carl David Anderson in 1932, 4 years after the prediction. It was the very first time in the history of ‘Quantum Mechanics’ that a particle was predicted before the proof of existence. “Positrons”sometimes generated naturally and also can be produced artificially, by some radioactive decay of certain isotopes like carbon-11, potassium-40, aluminium-26, iodine-121, etc.
• 𝑾𝑯𝑨𝑻 𝑰𝑺 “𝑨𝑵𝑻𝑰𝑴𝑨𝑻𝑻𝑬𝑹” 𝑶𝑹 “𝑨𝑵𝑻𝑰𝑷𝑨𝑹𝑻𝑰𝑪𝑳𝑬” 𝑨𝑪𝑻𝑼𝑨𝑳𝑳𝒀 ??
A ‘Proton’ is 1837 times heavier than an ‘Electron’.If we talk about the time before the discovery of “Positron” so, people used to think that the ‘Proton’ is positive and the ‘Electron’ is negative naturally. And, many questions were asked by many people that; “Why the ‘Proton’ is heavier than the ‘Electron’?” or “Why a ‘Proton’ doesn’t possess negative charge and why an ‘Electron’ doesn’t possess positive charge?” The discovery of a positive electron(Positron) by Anderson was the first evidence of these particles which were symmetrical to the particles of our everyday world (Electrons & Protons). They belong to what is now known as antimatter.
In 1932, when Carl Anderson discovered “Positron” for the very first time so, it was quite impossible for the scientists to demonstrate the existence of a “Positron”. On that time developed particle accelerators were not there so they waited for a long time to demonstrate. In 1955, the team of Emilio Segre and Owen Chamberlain using the Bevatron, the new accelerator at Berkeley (California), proved the existence of the antiproton, and then shortly afterwards that of the neutron antiparticle, the antineutron. And, not only they demonstrated it but also won the “Noble Prize” for it.
• 𝑴𝑬𝑻𝑯𝑶𝑫𝑺 𝑶𝑭 𝑪𝑹𝑬𝑨𝑻𝑰𝑶𝑵 𝑶𝑭 𝑨 𝑷𝑶𝑺𝑰𝑻𝑹𝑶𝑵….!!
The positron does not exist in our environment. According to the Einstein’s famous equation [E = M C²] relating mass and energy, it is quite possible to produce positrons with energy greater than 511 kEv, which is total the mass energy of a positron or an electron. One may create simultaneously one antiparticle. In the process, the total electric charge should be conserved.
• 𝑩𝒆𝒕𝒂-𝑷𝒍𝒖𝒔 𝑫𝒆𝒄𝒂𝒚𝒔 :- It is a very rare type of Radioactive Decay. The positron is produced together with a invisible neutrino-electron that escape detection. Energy is taken from the energy released in the decay.
• 𝑷𝒂𝒊𝒓 𝑷𝒓𝒐𝒅𝒖𝒄𝒕𝒊𝒐𝒏 :- This process is the simultaneous production of an electron and a positron. Pair production is observed in nature when a photon or an energy wave packet, of greater than 1.02 mEv passes near the electric field of a large atom such as lead, uranium or other heavy material with a large number of protons (around an atomic number of 80 or 90). In this process the photon is literally split into an ‘Electron’ and “Positron”. Both have a rest mass energy equivalent of 511 kEv.
‘𝑴𝑨𝑻𝑻𝑬𝑹’ 𝑨𝑵𝑫 ‘𝑨𝑵𝑻𝑰𝑴𝑨𝑻𝑻𝑬𝑹’ 𝑹𝑬𝑳𝑨𝑻𝑰𝑶𝑵…..!!
Now, after all these experiments and demonstrations still thousands of questions keep striking the brains of Science Enthuthiasts that; We know that each and every matter contains millions of millions of millions of electrons, now we have come to know about ‘Antimatter’ or ‘Antiparticle’ of an ‘Electron’ too. But, the thing is that as much electrons are present in our observable universe ‘Antimatter’ like;(“Positrons”, ‘Anti-Protons’ and ‘Anti-Quarks’) are not present. WHY????
It may possible that “A different universe is also there, totally opposite of ours, full of ‘Antimatter’ or ‘Antiparticles’ and thwy are searching for “Matter” which would be ‘Antimatter’ for them”, or “Our current technology for searching these particles are not too developed for tracing them”. Experiments have shown that a perfect symmetry between ‘Particles’ and ‘Antiparticles’ is not accurate or exact in the field of the weak forces responsibles in particular of beta radioactivity. Can this asymmetry ,which is very very small, can be the explanation for the absence of ‘Antimatter’ around us ? Who Knows…………These questions are very vital in the field of Particle Physics.
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