Talk:Irradiation

Materials that become radioactive after irradiation.

Im sure there are some (like silver). Any one got info on these materials?--Light current 16:26, 7 August 2006 (UTC)

IRRADIATION may be by particles or photons. The per particle energy ranges from zero to infinity (cosmic rays). Particles may be charged or electrically neutral. Charged particles are deflected in the electrical field of the nucleus and can enter the nucleaus only at extremely high energies. Neutral particles, namely neutrons can enter and even pass through the nucleus. In order to rest in the nucleus they need to be moderated or 'thermalized'; this is the key for nuclear power reactors. Otherwise, irradiation by neutrons is used for analytical and detection purposes. The radiation processing industry uses electrons or gamma rays. As electrons are deflected in the electric field of the nucleus, at the same time 'bremsstrahlung' is generated at very low efficiency. Such photons may penetrate into the nucleas and induce radioactivity. The threshold for such reactions is at 10 MeV or above; for this reason in industrial radiation processing the energy is usually limited to or below 10 MeV. Gamma rays are natural radiation (photons) from disintegration of radioactive nuclides. Their per particle energy is generally below the threshold for the induction of radioactivity. From this review here, it can be concluded that under 'normal' conditions no radioactivity is induced.

The INDUCTION of radioactivity can be used as a perfect analytical tool, as there are several chemical elements with some of their composing nuclides being apt for 'photo-nuclear' reactions. After being made radioactive, they emit spurious radiation with characteristic lines being used for identification and quantitative evaluation. Silver is one example, activated to a 'isomeric' transition which decays back to the non-active state within short periods.

There is a lot of PUBLICATIONS on this topic in relation to processing food by ionizing radiation. Dieter E (talk) 18:45, 14 February 2009 (UTC)

Misleading title 'irradiation'

With regard to the actual content of this article, the title 'irradiation' is misleading as it covers only 'ionizing radiation' and not irradiation in general. Eg. you may irradiate (illuminate) by light.

Furthermore, some of the subsections do not completely describe the respective applications. And 'assasination' does not at all cover irradiation but the intoxication by radioactive material.

Consequently, such revised article should be entitled 'Processing by Ionizing Radiation' and ambiguation tags and other links should be re-established (what is beyond my technical WIKI-capacity).

It has been proposed to transfer most description of the technology of processing by ionizing radiation to such more general article (see Talk: Food Irradiation) what was the impulse to this proposal here. - Dieter E (talk) 09:44, 21 October 2012 (UTC)

Is the VAT section an error

The rest of this article seems very clear, but I have no idea whats intended by "It can also be used to remove manual VAT entries from Sage Line 50".

I briefly skimmed the history to try to understand this, but didn't get anywhere.

I assume this is talking about the Sage Group accounting package Sage Line 50, and must have been added by accident, Is this correct, should it be removed? Joseph M Warren (talk) 18:08, 1 March 2013 (UTC)

I went ahead and took this out. Joseph M Warren (talk) 10:28, 5 March 2013 (UTC)

Transmutation of elements

The most obvious (IMO) technology for irradiation is the process that occurs in nuclear power plants, whereby cooling water and anything else close to the reactor fuel gets irradiated by neutrons, causing nuclei to be transmutated to heavier isotopes, which often decay to form other elements. Of course the decay products within the fuel itself get themselves irradiated. Chemical re-processing of all these materials can extract the newly-created elements, and centrifuge re-processing can separate isotopes of a single element, thus yielding relatively pure samples of rare elements or isotopes, which can then be useful in industry or medicine. Yet I see no section dealing with this topic, a major omission IMO. 198.144.192.45 (talk) 17:45, 25 March 2014 (UTC) Twitter.Com/CalRobert (Robert Maas)

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