as in international and national standards The general meaning is unambiguous but a value depends on a number of conditions and the purpose Hence a clear on a numerical value of the energy threshold ID: 883527
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1 in radiation protection is still weak fr
in radiation protection is still weak from an up to date point of view in texts as as in international and national standards. The general meaning is unambiguous, but a value depends on a number of conditions and the purpose. Hence, a clear on a numerical value of the energy threshold beyond a radiation has to be as "ionizing " is still missing. The existing definitions are, therefore, either correct very general or theoretical and hence not applicable. This paper reviews existing and suggests a a a a a a a a a takes about eV of energy to produce a ionization. Most human exposures to radiation are of energies of electron vol
2 ts (MeV) - energies at which many ioniza
ts (MeV) - energies at which many ionizations occur as the radiation passes through a a the process is not the only process by which energy of the radiation may be transferred to a A second important phenomenon is excitation, a process which can also have physical, or biological consequences. A radiation, such as low energy photons, may be ionizing in one but not in the choice of a suitable which a radiation is as non-ionizing, will depend on circumstances. The definitions given in this report apply to specified fixed cutoff value where relevant. bestimmte Teilchenenergie als Grenze zwischen nichtionisierender (zum Beispiel sicht
3 bares Licht) und ionisierender Strahlung
bares Licht) und ionisierender Strahlung la'Bt sich nicht angeben, da die StoBionisation benotigte Energie auch von der Art des ionisierten Gases abhangt. Die in der angewendeten Strahlungen haben im allgemeinen Teilchenenergien oberhalb 1 keV und dehalb eindeutig zu den ionisierenden Strahlungen. the energy needed to cause a valence electron to escape an is of the order of 4 - 25 eV, radiations must carry kinetic or quantum energies in excess of this to be called "ionizing". As will be seen, this criterion would seem to include electromagnetic with wavelengths up to about 320 nm, which includes most of the ultraviolet (UV) radiatio
4 n (~ 10 - 400 nm). However, for practic
n (~ 10 - 400 nm). However, for practical purposes these marginally ionizing UV radiations are not considered in the context of radiological physics, since they are even less capable of through matter than is visible light, while other ionizing radiations are generally more dieser Definition wird Strahlung einer Energie uber 5keV als ionisierende Strahlung festgelegt. Eine physikalische Abgrenzung zu Strahlung ist nicht moglich, weil die lonisation vom Material abhangig ist. a a a a a a a A 6 a a a a a A not a final a 4 biological N a E a 1 a a a a a a a a a takes cross 1 2 of Radiology, 6 1 2 A from