Wednesday, January 21, 2015

Beta radiation is of two types: Beta plus and minus Beta. Beta is minus electrons flow, but which d

Units of radiation, how to understand and how they deal | Postapo.cz octenisept
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Originally I had planned to write a review for the radiometer RBGT-62a, when shooting and thinking about a topic, how best to explain its function, but I had the thought processes back to the units of measurement of radioactivity. The device RBGT-62a is measured by the number of decays area. In some discussions, I saw this measurement instrument with a wide aperture octenisept when the tube is able to receive both beta and gamma radiation and then these values concerned without thinking they transferred to X-rays and cheered as they have a wonderfully sensitive instrument that reported much higher values after the transfer, than other devices with the same focus. I said to myself: "No, that's really not possible, for the first time will need to be done in units of a transfer order and determine what transfer goes and what does not."
Definition of radiation, or radiation is spreading energy space. Radiation is manifested as a wave or particle motion. This is called the dual nature of light. For our purposes, we will deal with particulate radiations arising from the disintegration of nuclei. octenisept These include:
Beta radiation is of two types: Beta plus and minus Beta. Beta is minus electrons flow, but which do not come from atomic shell, but the core where neutron octenisept quark rearrangement converts to a proton, an electron and a neutrino. Proton remains in the nucleus, and the electron is emitted along with antineutrino. When Beta plus decay is the emission of a positron. This comes proton decay, from which arises octenisept neutron, a positron and a neutrino. I Beta radiation is called radiation only for historical reasons.
Gamma radiation is electromagnetic radiation right, which is composed of photons of 10keV, these parameters meets hard X rays, naming then differ only by the radiation source even if the characteristics differ. If the source of gamma rays nuclear decay, results in that after self-disintegration octenisept can be one of the new nuclei in the excited state. Into a lower state by emitting octenisept a photon can go on with the same energy gamma radiation.
This radiation is divided into directly and indirectly ionizing. Directly ionize the charged particles, ie protons, electrons and positrons, indirectly uncharged particles: neutrons and photons. They themselves are not able to ionize their surroundings but shocks in an environment which fly throughs, causing secondary ionization.
For the energy which the radiation passes is important size and speed of the emitted particles. It then applies to the means necessary for its shielding. Simply speaking, the large slow particles such as alpha particles should cause strong ionisation, but in the material will reach far, several centimeters in gases and in the tissue of several to tens of micrometers.
Beta particles will fly further in the air about 8 m, aluminum 4 mm. In the water thanks to him there is an interesting phenomenon, which is called Cherenkov radiation. Beta particles flying in this environment for its faster than radiation of photons, beta particles so that during the period of rapid flight polarizes atoms along its path. After passing the atoms themselves again depolarize and excess energy obtained absorbed in the form of photons. This radiation can be monitored, for example in nuclear reactors under water as bluish light.
Gamma particles need to have their stop layer of concrete or lead, a heavy dense materials, neutron radiation, on the other hand is best absorbed by the light elements, kupříkadu hydrogen which can slow down or captures.
Any such radiation, either primarily or secondarily ionizing cause changes in all materials, are therefore dangerous. While passing octenisept through the tissue, the particles absorb or interfere with, the atoms in the tissue are ejected electrons octenisept and form cations, which are positively charged atoms. Because it is an ionization cations octenisept are reactive molecules and which contain the affected atoms are broken and entering other chemical reactions with its environment. These radicals can attack DNA, in which interrupt binding strings and tear, and as a result, then either the cell is also not able to maintain their processes and performs controlled death, or is absorbed as broken due protective processes of the organism, or is not violated octenisept its overall functionality and if is impaired reproductive function of the genetic information may be uncontrollably divide and cause disease. On the other hand, cells have repair mechanisms, so even if is found naturally in natural radiation, are capable of a certain degree of repair.
The intensity of the radiation source or activity. The basic unit is Becquerel, the symbol is Bq, and is a unit derived sous

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