Talk:Gamma ray

message: Section 1, Paragraph 1, Sentence 1, Begins with "This property means that gamma radiation is often used..." Implying that something was discussed before the beginning of the article. Larek (talk) 14:27, 12 June 2009 (UTC)
thread_title: Missing Content

message: Consider that "beta decay" can refer either to negatron or positron decay. If it is negatron decay, an antineutrino is emitted; if it is positron decay, it is a neutrino.
Because a beta decay is accompanied by the emission of a neutrino which also carries energy away, the beta spectrum does not have sharp lines, but instead is a broad peak. Hence from beta decay alone it is not possible to probe the different energy levels found in the nucleus.
should read
Because a beta [negative] decay is accompanied by the emission of a[n anti-]neutrino which also carries energy away, the beta spectrum does not have sharp lines, but instead is a broad peak. Hence from beta decay alone it is not possible to probe the different energy levels found in the nucleus.
Bobcat167 (talk) 01:32, 9 January 2011 (UTC)
thread_title: Incorrect information

message: See title, Pcb21 Pete 08:52, 26 April 2006 (UTC)
thread_title: How are gamma rays detected/observed?

message: I've just read that the cockroach exoskeleton helps shield them against alpha, beta, and gamma rays. Could a possible application be - that we can shield people from radiation by using the cockroach exoskeleton instead of lead?
:Where did you read that? Cockroach states that their radiation resistance is from the fact that their cells divide less often than humans'. --Ihope127 20:38, 6 June 2006 (UTC)
replies: text: The exoskeleton of an insect is mostly chitin (C8H13O5N)n) and has no better shielding properties than an equal weight of paper. Their "resistance" to radiation is not due to enhanced "shielding". But this entry was worth a laugh, thanks.Abitslow (talk) 21:09, 31 March 2015 (UTC)
thread_title: Using Cockroach exoskeleton instead of lead to shield against gamma rays

message: Right now, it is not clear what do references in the end of the article refer to. Why not to migrate to the <ref> system? —Matveims 01:48, 29 May 2006 (UTC)
thread_title: References

message: Gamma rays also have an industrial application.
They are used the same way x-Rays are used to produce images. Weld and other such sensitive items are inspected by bombarding it with gamma rays to create an image of the interior of the item on a piece of film. The most common Isotopes used are: Iridium 192, Cobalt 60, and Cesium 137.
-Devin Snyder
source: http://www.ndt-ed.org/EducationResources/CommunityCollege/Radiography/cc_rad_index.htm —The preceding unsigned comment was added by Myghell (talk • contribs) 07:15, 7 March 2007 (UTC)
thread_title: industrial uses

message: "The gamma rays are the most dangerous form of radiation emitted by a nuclear explosion because of the difficulty in stopping them. Gamma-rays are not stopped by the skin."
This is not quite true - the most dangerous type of radioactive exposure occurs when radioactive gas or dust which is undergoing alpha decay enters the body. The fact that "gamma rays are not stopped by the skin" is actually a good thing in some ways, as gamma rays are far more likely to pass straight through the body without being absorbed than alpha or beta radiation is. Gamma rays are also far less ionising than alpha or beta radiation. Possibly this section needs to be rewritten? Sbiki 14:46, 20 April 2007 (UTC)
thread_title: Health effect

message: If anyone has a vested interest in this article and wants to follow this up. It's only small, but text has been copied from this article, verbatim, with no attempt to attribute it. Full details here: http://en.wikipedia.org/wiki/Wikipedia:Mirrors_and_forks/Def#Fallen_Earth_Forums
*Done. 87.194.203.205 05:44, 5 October 2007 (UTC)
thread_title: Small copyright infringement

message: could someone please add a secton on the eenage mutant nija turtles
Veggieburgerfish 19:42, 17 September 2007 (UTC)
replies: text: Actually, a section dedicated to popular references to Gamma Rays wouldn't be that bad. --Antonio.sierra 22:08, 14 October 2007 (UTC)
replies: text:  It should also include the pioneering work of Dr. Bruce Banner.
Right. No Hulk references is a major omission.  — Preceding unsigned comment added by 146.127.253.45 (talk) 13:10, 23 September 2016 (UTC)
thread_title: Whole missing section!

message: Prior to my edit, the article provided a statistic for comparison, stating that the risk of cancer (other than leukemia) was elevated by 32% for atom bomb survivors. The link that it quoted, however, stated that it was 0.32 (ie, 32%) per Sievert of exposure. Without knowing the average exposure of the atom bomb survivors, this isn't really very useful for comparison, so I've removed it.
Ideally, it should be reinserted with a corrected statistic, based on the radiation dosage received by atom bomb survivors. Unfortunately, the linked article doesn't provide a reference for the statistic, so I can't find the original study to look it up. —Preceding unsigned comment added by 130.155.198.32 (talk) 04:41, 21 December 2007 (UTC)
thread_title: Misinterpretation of study

message: This is a legitimate, if somewhat obscure (to this user) term. It keeps turning up here linked to the article dealing with the physical manifestations of a coil. Can any user either add a paragraph here covering the term, or even start a new article? --Old Moonraker (talk) 06:16, 20 May 2008 (UTC)
thread_title: Coil wavelength

message: The citation for this mentions it in passing, and I fear it may have been misinterpreted. I am not a physicist, but I was not aware that photons could "stop" each other, only interact by interference. Can anyone with a more solid background comment? Robin S (talk) 23:53, 2 September 2008 (UTC)
replies: text: Thanks for the prod: this section has been bugging me for a while. Rewritten from the sources, not from knowledge. Might benefit from some oversight by someone who knows what they are talking about! --Old Moonraker (talk) 06:49, 3 September 2008 (UTC)
thread_title: Gamma rays "stopped" by background light?

message: FYI: The first link isn't working (404)
http://www.rerf.or.jp/eigo/radefx/basickno/whatis.htm
Anyone know of an alternative? —Preceding unsigned comment added by RTFArt (talk • contribs) 18:38, 9 October 2008 (UTC)
thread_title: Dead Link

message: This page needs to be moved to Gamma-ray. Within scientific literature, virtually all usages have the hyphen. I noticed this while preparing Gamma-ray burst for WP:FAC. Jehochman Talk 16:14, 19 December 2008 (UTC)
replies: text: A common style would be to use the hyphen in the adjective as a compound modifier (e.g. Gamma-ray energies) but not in the noun (e.g. Gamma rays). Alpha particles do not use hyphens when they are nouns. --Rumping (talk) 10:40, 21 January 2009 (UTC)
replies: text: Yes, you are right. Jehochman Talk 13:02, 21 January 2009 (UTC)
thread_title: Move

message: The article states "'gamma rays are' produced by sub-atomic particle interactions, such as electron-positron annihilation."
Isn't it true that the annihilation (through antimatter reaction) of other subatomic particles in the nucleus could result in said radiation? Beyond that, can't gamma radiation also be caused by superfluous energy in the nucleus after other types of nuclear decay (beyond what the article states, immediately after my included quote)?
It's somewhat confusing that the example is so explicit, without being followed by a greater degree of generalization. —Preceding unsigned comment added by 80.202.73.173 (talk) 18:59, 1 February 2009 (UTC)
replies: text: WRONG! Neutron decay is a well established decay mechanism which preserves Z. Antiparticle annhilation requires antiparticles. We don't typically consider the nucleus to have any antiprotons, antineutrons, or antiquarks available. But we need to be careful about the context we are discussing/assuming. But yes, a nucleus emitting only a gamma-ray is almost certainly one which has been excited to a higher energy state and is giving off a little vibrational energy in the form of emr.Abitslow (talk) 21:43, 31 March 2015 (UTC)
thread_title: Possible confusion as to source of gamma radiation.

message: Go ahead and click on the Cobalt 60 link. Whoever wrote this page put in the link destination as "Cobalt_60" instead of "Cobalt-60", note the underscore instead of dash, which linked it to a rock group. And because these authors consider themselves SUCH experts epitomizing the pinnacle of flawlessness, they made it impossible to edit the Gamma Ray page. Way to GO, guys! You kept me from hijacking your precious work by correcting your mistakes. You should be proud. SO. Some users are given "big cheese" status obviously, able to modify certain pages that are off limits to ordinary dolts who they think would screw it up. Who do I have to petition to get the big cheese status for myself? Sandorman (talk) 15:20, 1 March 2009 (UTC)
replies: text: I fixed it for you; stick around for a few more days and do a few more edits and it will let you in to edit gamma ray. Semiprotected articles need the editor to have made 10 edits first. Do you know anything about that "gamma ray window"? Graeme Bartlett (talk) 20:37, 1 March 2009 (UTC)
replies: text: That entire "gamma ray window" sentence was spurious. ("The most biological damaging forms of gamma radiation occur in the gamma ray window, between 3 and 10 MeV. See cobalt 60.") It was completely unsupported and very unverifiable (I tried hard!), so I removed it. It was added 2009-02-25 by IP-address user 68.202.9.8 who has only 4 edits, some of which were wacky. Unfortunately, many online posts have casually quoted that sentence since then, simply because it was on Wikipedia and therefore has to be true. Ugh. It is a WikiMyth! No one corrected the bad grammar in the article, but it was corrected in various ways when copied and re-posted elsewhere. Some added smart-sounding but hokey details. ("Those below 3.0 MeV are NOT very harmful. They have poor penetrating power and do not deposit much energy. Those higher energy gamma rays of greater than 10 MeV are NOT very harmful because the body is relatively transparent to them.") One definition for "gamma ray window" that fits that sentence would be a range of energies or wavelengths at which the attenuation coefficient of matter is especially low, similar to the infrared window for IR radiation, or the water window for x-rays. There actually is such a range, at around 4MeV, where most elements show a minimum in their mass attenuation coefficient for photons (x-rays and gamma rays). The problems are: 1) No one else calls that phenomenon a "gamma ray window". 2) The local minimum does not mean that 3-to-10MeV rays are more damaging; if anything, it would make them less damaging to life. 3) Official guidelines deem all x-ray and gamma radiation to be equivalent in biological activity. Similar measured doses of photons do similar damage, independent of the photon energy. No one says otherwise. 4) 3-to-10MeV radiation might have an easier time getting through shielding, but the subject is what that radiation does, not how hard it might be to shield. 5) The increase in attenuation above 10MeV is not as dramatic as the fall to the minimum. Thus, energies above 10MeV are not very dissimilar to energies inside the "window". 6) Most online mentions of "gamma ray window" refer to astronomers' ability to "see" gamma radiation from outer space. The window is said to be "open" when detection instruments are online, and "closed" when they are offline. The width of the gamma window is the range of energies which can be detected. 7) Some online mentions of "gamma ray window" mean a physical aperture through which gamma rays enter an instrument. 8) A "gamma ray window" could refer to the 3-to-10MeV range of extraterrestrial gamma rays which might pass more easily through the earth's atmospheric shielding and interstellar dust and gas. Thus 3-to-10MeV gamma rays could be easier to observe using ground-based instruments (not possible), and 3-to-10MeV gamma rays could be more able to reach earth from distant gamma-ray bursts and kill us. This might or might not be true, and the notion of which ranges of extraterrestrial radiation could injure life on Earth really does not make that kind of radiation "the most damaging". -A876 (talk) 05:33, 12 September 2013 (UTC)
replies: text: If you look around the web you'll find a lot of WikiMyth! I've even corrected the source Wiki only to ponder the thousands of casual copies all over the web !! 89.217.12.52 (talk) 00:14, 15 July 2014 (UTC)
replies: text: To further comment on your excellent and crisply argued research: "which ranges of extraterrestrial radiation could injure life on Earth" -- to put a sharper point on it "which ranges of rare, catastrophic extraterrestrial radiation could injure life on Earth" ...  89.217.12.52 (talk) 00:23, 15 July 2014 (UTC)
thread_title: Cobalt 60 link needs to be fixed

message: I'm running the beta view of Wikipedia and the Nuclear physics side box is covering up text in the intro paragraph. I'm unfamiliar with editing layout problems like this and am not sure if the problem is with this article in particular or if it is a problem with the beta version itself so someone more experienced may want to look into this. —Preceding unsigned comment added by Nyr56 (talk • contribs) 02:55, 16 November 2009 (UTC)
thread_title: Layout Problem

message: I find the layout near the end confusing, with a section title "Health Effects" and no subsections, then a following section, "Uses" with subsections Body Response and Risk Assessments, both of which refer to health effects. The first sentence in "uses" refers to irradiation, then it moves on to radiation treatment and imaging, and the section ends with container scanning. This is followed by a subsection back on irradiation/health. There seem to be a number of regular editors here and I'm a first-time visitor, so maybe one of you could look at those sections with a fresh view? Robsavoie (talk) 22:40, 27 December 2009 (UTC)
thread_title: More Layout

message: In the risk assessment section it seems silly to use the cs- prefix for the dose. Why say 500 cSv and not just 5 Sv for example? It seems more logical and straightforward in this section to not use the cs- prefix? Abiermans (talk) 22:48, 9 December 2009 (UTC)
thread_title: Unit prefix

message: What is the shortest wavelength discovered/Measured Gamma ray? --Nevit (talk) 22:15, 14 March 2010 (UTC)
thread_title: What is the shortest wavelength discovered/Measured Gamma ray?

message: Check out the page on Gamma ray astronomy! Seems like the highest energy photon observed so far came from The Crab Nebula and was around 50 TeV in energy...I'll let you work out the Wavelength
http://iopscience.iop.org/1538-4357/492/1/L33/
Energy in Joules= [Planck's constant x Speed of light]/wavelength in metres.
Rearrange the equation.
http://heasarc.gsfc.nasa.gov/cgi-bin/Tools/energyconv/energyConv.pl
So 2.4797 x 10^-20 m was the wavelength, DON'T TRUST ME, DOUBLE CHECK. I wonder if photons with wavelength lower than the Planck Length scale(1.616252(81)×10−35 m) could be used like a microscope or Electron microscope to explore the Planck length quantum scale of the cosmos? I'm sure it would reveal more than just tiny quantum foam etc, perhaps even BoundaryLayer waz here vandalism all over the Universe?
http://www.pd.infn.it/TeV/Pdf_talks/Stanev_29.pdf
Even more energetic PeV gammma rays mentioned.
Although unlikely to be A Photon Ultra-high-energy cosmic ray
50 Joules of energy gives you a photon wavelength of 3.9729e-27 m, which would work for my 'microscope' needs.
http://www.antonine-education.co.uk/Physics_AS/Module_1/Topic_3/topic_3_particle_model_of_light.htm
If anyone finds a reference to a higher energy photon being observed, please let me know!
--Boundarylayer (talk)
:The most energetic gamma rays thus far "discovered" are in the 1-10 TeV range, where "discovered" means 5σ (five sigma) statistical significance. (tevcat, see FAQ for info on 5 sigma) A number of gamma rays have been "detected" in the 10-100 TeV range, nearly all below 30 TeV. ("Detected" means at least 2 sigma.) The most energetic that I am aware of are from HEGRA 2004 at 86 TeV and 80 TeV, both from the Crab Nebula  see page 5, chart on left side. Finally there is the famous Fly's Eye 320 EeV event of 2004 usually reported as a cosmic ray, but with some possibility that it may have been a gamma ray. Zyxwv99 (talk) 22:53, 16 August 2014 (UTC)
thread_title: A tentative 7 to 50 TeV

message: FTA: Gamma rays from radioactive decay commonly have energies of a few hundred keV, and are almost always less than 10 MeV in energy.
This sentence is very confusing. Could someone please re-phrase? —Preceding unsigned comment added by 212.71.114.220 (talk) 08:46, 25 October 2010 (UTC)
replies: text: Rephrased. Materialscientist (talk) 08:55, 25 October 2010 (UTC)
thread_title: Energy phrasing

message: For example: . I'm reverting a new IP editor who seems to think it's improper. SBHarris 00:01, 1 March 2010 (UTC)
thread_title: Gamma decay is a common term

message: Gamma decay redirects here, and the article freely uses the term, but it is never explained or defined what gamma decay is.  --Lambiam 23:50, 10 February 2011 (UTC)
replies: text: Gamma decay is the type of radioactive decay of an excited state of a nucleus, where a gamma ray is the thing that is emitted. I'll see if I can make sure it is used in a sentence in the article somewhere.SBHarris 04:05, 11 February 2011 (UTC)

text: Gamma decay redirects here,and the article freely uses the term,but it never explained or defined what gamma decay Lambiam 23;50,10 february 2011 103.99.12.130 (talk) 06:01, 15 March 2022 (UTC)
thread_title: What is gamma decay

message: Do we really have to use centisieverts (cSv) as a unit? They are exactly the same as a rem after all. Otherwise how about just converting them to mSv or Sv?
The radiation quantities template has now been added   Dougsim (talk) 16:48, 27 April 2018 (UTC)
thread_title: Measurement units

message: I think the wavelengths should be either preceded by 'in a vacuum' or that stated at the beginning of the article eg. 'This article refers to gamma rays in a vacuum' as their wavelengths will be significantly changed by the speed of the light, reduced in glass or water whereas the frequency is constant. Please comment below to say whether this going to be considered or implemented.
:When wavelengths are given without qualification, it's assumed that they are in vacuum. Furthermore, the effect of common media on the wavelength of X-rays and gamma rays is so small that it doesn't effect wavelength until the 5th significant digit, which means the fuzzy wavelength boundaries given in this article are the same in water as in vacuum. Example, the wavelength of the 0.8 Angstrom Co-57 gammas in Lucite plastic is the same as in vacuum, less 1.3 parts PER MILLION (which is how much the refractive index is more than vacuum).  In short, don't worry about it. SBHarris 19:28, 21 April 2011 (UTC)
thread_title: Should wavelength be included

message: Right over at Risk Assessment (http://en.wikipedia.org/wiki/Gamma_ray#Risk_assessment), the article poses:
"By comparison, the radiation dose from chest radiography is a fraction of the annual naturally occurring background radiation dose,[15] and the dose from fluoroscopy of the stomach is, at most, 50 mSv on the skin of the back."
Now, whether it is significant that 50mSv would be exposed to only the skin of the back, or that 50 mSv hits you, I don't know. Before, however, the article states that "the average total amount of radiation received in one year per inhabitant in the USA is 3.6 mSv.[13]".
My question now is: is this 50 mSv a typo? If not, the construction of the whole first quotation, especially with the mentioning of "fraction of the annual", indicates that the total radiation dose of fluoroscopy too should be insignificant. I kinda find one radiation dose worth roughly 14 years of USA exposure rather significant, so, shouldn't this be made clear.
Any specialists? I'm just reading up, having a question.
Tonijnenlul (talk) 10:54, 22 June 2011 (UTC)
replies: text: I don't see any reason to believe that's a typo. Those numbers are consistent with the info in the article Background radiation and seem quite reasonable to me. Dauto (talk) 20:08, 23 June 2011 (UTC)
replies: text:  Yes. Fluoroscopy really does deliver huge amounts of radiation. 50 mSv should be compared to 5 to 8 mSv for a chest CT, but only 0.06 mSv for a chest X-ray (two views). Which in turn compares with background of 3.6 mSv. I've fixed up the fluoroscopy section so it doesn't sound like it's a small dose (it's not). I'll add the CT numbers as it's what people are more familiar with (very few people will every have fluoroscopy). SBHarris 01:11, 24 June 2011 (UTC)
thread_title: Is there a typo in this article? No specialist.

message: So in the first section, it says that in the past, the distinction between gamma and x rays was at an arbitrary wavelength (or the corresponding frequency). The second section opens up by saying that, in the past, the distinction was based on the energy level. That is directly contradictory to what the first section says.
:No, they are the same. Photon energy determines photon wavelength and frequency. E = hf and E = hc/lambda. SBHarris 01:18, 22 June 2013 (UTC)
replies: text: You are mixing up energy of an individual gamma particle and radiation energy (one way to express it is take a product of particle energy and the number of particles hitting a panel during a certain period). Materialscientist (talk) 01:50, 25 March 2012 (UTC)

text: "High energy PER PHOTON". This is a basic quantum mechanical relationship. Energy and frequency in quantum mechanics are the same thing (they literally differ only by the constant factor h, which is Planck's constant). In a beam of radiation you cannot have less energy than E = hf. You can have more energy than this minimum (any amount) but only by having more than one hf (photon), so that E(total) = n (hf). Gamma rays are made one photon at a time. Each nucleus makes a photon. The frequency of the photon hf is determined by the energy available to make it. Please read photoelectric effect. SBHarris 01:18, 22 June 2013 (UTC)
thread_title: This is a mess.

message: I was trying to find out who discovered gamma rays and when... but no history section? SteveBaker (talk) 18:12, 10 February 2008 (UTC)
replies: text: Discovered and investigated by French physicist, Paul Villard, around 1900. He established some of its properties, correctly noting its similarity to X-rays. Rutherford was probably the first to actually call them gamma rays, and to understand that they were high-energy photons. Read some more here. I will add a paragraph when I get some free time. Cragwolf (talk) 02:15, 11 February 2008 (UTC)
thread_title: Needs a history section.

message: These edits have replaced footnoted, verifiable material with a new version of history without citations which I am unable to confirm. It's true that Bequerel discovered natural radioactivity years before Villard's experiment, and perhaps his films were darkened in part by radium gamma? But it doesn't sound like it: uranium is an alpha/beta emitter, and according to this source Becquerel even denied Villard's experimental results and conclusions. So although it may be useful to mention Becquerel, I think we should reinstate Villard and distinguish carefully what these two men's contributions were.--Yannick (talk) 16:37, 8 December 2012 (UTC)
thread_title: Discovery

message: The article mentions that the gamma rays were thought to be massive particles, but they were in fact massless EM radiation, as demonstrated by the fcat that they did not get deflected by magnetic fields. However, surely this is simply a sign that they are not charged/ have no magnetic moment, and nothing to do with their mass, or wave/particle character?
80.254.147.172 (talk) 07:58, 27 August 2013 (UTC)
replies: text: Correct. Gamma rays were only identified definitely as photons in 1914, when they were observed to be reflected from crystal surfaces. source. — Reatlas (talk) 12:59, 27 August 2013 (UTC)
thread_title: Question on magnetic fields

message: Gamma decay (which does not exist as its own article) is a very important radioactive decay process, with many fine points and subsuming the entire field of gamma spectroscopy-- a main topic in nuclear physics. Presently, however, because it has been incorporated here as a source of gamma rays, the entire topic of gamma decay exists only as a short subsection here, on gamma ray!  
Imagine if such an important topic as beta decay existed only in Wikipedia as a small section of an article on "high speed electrons" (which could also be produced by accelerators and found in cosmic rays). That would not be good, would it? 
Per WP:SS we need a long stand-alone article on gamma decay. The subsection on gamma decay here on gamma ray can be left or shortened a bit, and "gamma decay" can be the "main article" for it. The gamma decay article can be lengthened with more data, and also some of the material from nuclear isomer article, which in some sense stands in for it, on Wikipedia now. But that's also not right. Most gamma decay does not take place from nuclear isomers. It happens immediately (within 10-12 sec) and doesn't deserve to be ignored for the sake of a few sexier nuclides that gamma decay slowly enough to have measurable half lives and act like other familiar radioactive decay.
I volunteer to start this thing. But I'm no expert on gamma decay, and it's going to have to serve as a "seed" article that will be allowed to let grow, and not have somebody decide that it needs to disappear and be shoe-horned into here, again. It's an important topic in any encyclopedia. Except this one. We need to recognize that, and create it and then leave it alone until it takes its rightful place. SBHarris 05:50, 2 October 2014 (UTC)
thread_title:  Let us consider a split (no, not a fork) to create a decent and needed article on ''gamma decay'' 

message: The following paragraph seems disconnected from the article, poorly set up and generally unparsable:
"In optical spectroscopy, it is well known that an entity which emits light can also absorb light at the same wavelength (photon energy). For instance, a sodium flame can emit yellow light as well as absorb the yellow light from another sodium-vapor lamp. In the case of gamma rays, this can be seen in Mössbauer spectroscopy. Here, a correction for the Doppler shift due to recoil of the nucleus usually is not required, since the emitting and absorbing atoms are locked into a crystal, which absorbs their momentum (see Mössbauer effect). In this way, the exact conditions for gamma ray absorption through resonance can be attained." Zedshort (talk) 14:32, 2 October 2014 (UTC)
replies: text: Okay, see if it is understandable now. I didn't write it, but I know what the original author was trying to say. SBHarris 23:08, 2 October 2014 (UTC)
thread_title:  Paragraph needs rewriting 

message: I would kindly ask, if CERN can give information on the Highest Energy Ever found for a Gamma Quant from Accelerators so far. They have 15 TeV acceleration power. So, what was the most energy rich Gamma quant so far observed? And, are You SURE a 50 TeV Gamma quant can exist, or would it resemble another unknown particle, say, a high energy Neutron, Proton, or Tritium or even heavy ion something accelerated from the sun blast. I would say a high energy ion would NOT catch an electron. so it probably was a heavy ion impact. I think there HAS to be a limit on Gamma energy, forming other particles when energy exceeds. check theory on neutrino pair, quadruplets, +/- muons, e+ e- formation, etc. A that immense gamma quant would pair formate and dissipate. --Wikistallion (talk) 13:16, 8 May 2013 (UTC)
replies: text: See Very-high-energy gamma ray which says 16TeV is indirectly observed from the light from the shower of particles produced. The shape of the light flash differs for ions as compared to gamma ray photons. Graeme Bartlett (talk) 10:33, 8 May 2015 (UTC)

text: There is no upper limit on the energy a single photon has - at least, no known limit. There is an obvious difference between claiming something CAN happen and something WILL or MUST happen. Gamma-ray photons CAN form electron-positron pairs (for instance). That does NOT mean that Gamma rays above 1-2 MeV (an electron's rest mass is 0.511 MeV) normally convert to these pairs. Wikipedia is NOT a forum for discussion of original research. Wikistallion makes a number of claims without providing any sources. These can and should be ignored as outside of Wikipedia's scope, imho.98.21.243.87 (talk) 20:07, 20 October 2017 (UTC)
thread_title: Highest energy

message: So, we have much known about these rays..... Can't we find a way to create these rays using homemade device? Ravi44pk (talk) 15:30, 10 June 2015 (UTC)
thread_title:  Making Gamma rays 

message: I think the sketch shown at the top is at least misleading. The amplitude of the (wave function of the) photon should not increase with the distance from the nucleus.  — Preceding unsigned comment added by Tomcat berlin (talk • contribs) 20:20, 7 September 2015 (UTC)
thread_title: Incorrect Sketch

message: Why isn't there any mention that high doses of gamma radiation can turn you into Lou Ferrigno?
2001:468:C80:A103:F07C:86C0:13D6:4D7F (talk) 07:01, 9 October 2015 (UTC)
thread_title:  High doses 

message: Hello fellow Wikipedians,
I have just added archive links to  on Gamma ray. Please take a moment to review my edit. If necessary, add  after the link to keep me from modifying it. Alternatively, you can add  to keep me off the page altogether. I made the following changes:
*Added archive https://web.archive.org/20050414173513/http://www.astro.caltech.edu:80/%7Eejb/faq.html to http://www.astro.caltech.edu/~ejb/faq.html
*Added archive https://web.archive.org/20000815222730/http://nucleardata.nuclear.lu.se:80/nucleardata/toi/ to http://nucleardata.nuclear.lu.se/NuclearData/toi/
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Cheers.—cyberbot IITalk to my owner:Online 02:22, 24 February 2016 (UTC)
thread_title:  External links modified 

message: From the section Units of measurement and exposure:
The measure of the ionizing effect of gamma rays is called the exposure:
* The coulomb per kilogram (C/kg) is the SI unit of ionizing radiation exposure, and is the amount of radiation required to create 1 coulomb of charge of each polarity in 1 kilogram of matter.
I can't understand this definition nor the 5 others that follow it.
(1) Should it be "The measure of the ionizing effect of an exposure to gamma rays on a clump of matter"? Otherwise it sounds like a physical constant.
(2) How do gamma rays create charge? By pair production (conversion of photons to charged matter)? By polarization? By ionization? In the latter case it seems highly dependent on the material, yet this is not stated. Perhaps it should say "the amount of radiation required to create 1 coulomb of charge  of each polarity through ionization."
(3) The phrase "amount of radiation" suggests that the unit is an extensive quantity (photons, energy, or coulombs) rather than intensive (C/kg). 
(4) Yet at the same time, the phrasing "amount of radiation required to create 1 coulomb in 1 kilo" suggests that it is harder to create the same coulombs in 10 kilos, so that the unit is really multiplicative, i.e. C⋅kg. 
This makes 3 interpretations in total! The language is entirely confusing.
Similar confusions are repeated in every entry in this section (6 in total). 178.39.122.125 (talk) 00:31, 27 July 2016 (UTC)
thread_title:  Confusing definitions of units in "Units of measurement and exposure" 

message: As a man of Medicine, it accurately captures my disgust when "physicists" defy convention and promulgate that a "gamma ray" can arise from anywhere but a nucleus. I could scarcely care less whether said ray comes from my lilacs or an alien dimension far, far away. Call it an X-ray or show yourself the door. No man possessing the power to shape the world in any practical effect cares if it has "too high a frequency". Stay in your lane and stop polluting nucleur medicine with your woke, highfaluten malarkey. 'Nuff said good day! Where do they get the nerve? 76.188.120.7 (talk) 10:15, 15 April 2022 (UTC)
thread_title:  The last section deserves an award 

message: ORIGINAL: "It consists of the shortest wavelength electromagnetic waves, typically shorter than those of X-rays. With frequencies above 30 exahertz (30×1018 Hz)". 
REQUEST: change "(30×10^18 Hz)" to "(3×1019 Hz)" for proper scientific notation. Trainwreck0275 (talk) 01:35, 18 December 2022 (UTC)
replies: text: OK, done. Graeme Bartlett (talk) 02:46, 19 December 2022 (UTC)
thread_title:  Semi-protected edit request on 18 December 2022 

message: https://www.space.com/sun-blasts-highest-energy-radiation-ever-recorded-raising-questions-solar-physics 2600:8800:395:B000:30D7:AF85:59F:2271 (talk) 06:14, 8 August 2023 (UTC)
thread_title:  This article seems to counter a few points mentioned in this article