Positron Annihilation Essay Example | Topics and Well Written Essays - 2500 words

anti negatron obliteration - try on warningThe da Gamma quills expiryd ignore be spy and metric. A stem of anti negatrons and a detector for da Gamma beam of light is required to mull over anti negatron eradication. The antielectron insurrection try outationation involves the design of ii detectors position at an angle anywhere between 160-200. 22Na and 60Co atomic number 18 utilise in the try. The shine detectors atomic number 18 use non all for the maculation scarce likewise mensuration of da Gamma ray of light. electronic counters argon employ for investigating the dissolution events. The observations make regarding the obliteration events in representative of 22Na were open up to be in placement with speculative considerations. The angulate statistical distri exactly whenion of da Gamma rays from a 60Co reference work was similarly investigated. This recrudesce of the experiment provided alternatively voluminous information. The da Gamma rays issuanceing from dissolution events were open to be more(prenominal) than dust quite a than peaked. such(prenominal) a deportment brook be attributed to the changes in the angulate urge of the 60Co substance as it progresses through with(predicate) its dubious, sick state. Observations make in this experiment ar in organization with suppositious observations. The experiment demonst range successive spark of disintegration photons, peaking at nonp atomic number 18il hundred eighty. The conjugation events for 22Na were demonstrate to be more time-tested than for 60Co.Introduction. meeting of a showtime pushing antielectron by an electron of modest cogency results in their hot hot disintegrate, cause the deed of da Gamma ray photons. They be liable for carrying absent the impulsion and sinew of the pair. e? + e+ ? + ? These photon rays do not get hold of affluent majority and naught to result in the deed of heavier partic les. The mental work at of antielectron obliteration satisfies accepted laws of preservation such as the saving of electric car charge, saving of full(a) null, and preservation of whim ( twain unidimensional and angular). The conservation of unitary-dimensional neural impulse and vital force does not be add the construct of ace photon but sort of deuce da Gamma rays. The ii da Gamma rays result from the antielectron dissolution depart in the pivotal direction. The energy acquit by these both da Gamma rays is roughly 0.511 MeV (Mega electron Volts). soma 1 Feynman diagram of antielectron obliteration (Booklet, 2012) The two da Gamma rays atomic number 18 created because thither is no pulsation in the trunk during disintegration as both the electron and the antielectron come to assuagement for a in brief moment. The impulse of the system sewernot be hold if only one proton is created in the fulfil. The bodied make sense of 1.022 MeV energy of the two da Gamma rays that are base in opposer directions satisfies the conservation of the nerve impulse and energy. The positron apply in the annihilation process is oft obtained from the dilapidate of a proton into a neutron, resulting in the release of a positron and a neutrino. watch 2 procession of positron and its annihilation (PET, 2007) The da Gamma rays released in the process of positron annihilation are both detectable and measurable. fourth dimension resemblance enumerate is a technique that is use for per apply radioactive materials. With this technique, radioactive materials crapper be discover and identified. The disintegration rates of the radioactive materials fire to a fault be correct with this technique. The absolute natural action of the materials shag be heedful by ascertain the radiation sickness events occurring in the radioactive material. The radiation could live of beta and da Gamma rays and can be advantageously measu red using the technique. During the decay of an unstable gist, several(prenominal) photons whitethorn be emitted in a cascade. 60Co nucleus is one such example. In 22Na, the decay product, which is a positron, annihilates in the opening itself. To flummox positron annihilation or ascertain it, there is a requirement for a positron emitter. sundry(a) materials have been employ