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Radioactivity Counter?
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This app was mentioned in 26 comments, with an average of 5.65 upvotes
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You can use your phone as a good-enough geiger counter. The camera sensor is also sensative to gamma and beta, and there are a few apps that take advantage of this.
Huh, TIL you can get apps to use your phone's camera as a radiation sensor. Thanks Dent!
First two apps I stumbled upon:
https://play.google.com/store/apps/details?id=com.rdklein.radioactivity&hl=en
https://play.google.com/store/apps/details?id=eu.camdetector.radiationalarm&hl=en
Radioactivity Monitor turns your phone into is a relatively accurate gamma and high-energy beta counter. Its function has been verified by testing.
the app: https://play.google.com/store/apps/details?id=com.rdklein.radioactivity
i tested it with some mobile phones..depends on the camera, at first it needs about 10min calibration time but then works on my old sony Z3 with uranium ore
I remember this. It would work on gamma radiation. High energy photons would penetrate the tape and show up as bright dots on the CMOS, while alpha particles would be stopped by the tape and camera lens, so it definitely wouldn't detect alpha decay.
I'm not sure how beta particles, some of which may penetrate through to the sensor, would react.
EDIT: Here is one. https://play.google.com/store/apps/details?id=com.rdklein.radioactivity&hl=en
Looks like it detects gamma radiation and some high energy beta radiation, depending on the phone, so I was mostly right. :) I wouldn't depend on this to test food.
Mobile phone cameras are advanced enough to detect not just light, but higher energy gamma rays. This, combined with the proper app, can turn a smart phone into a proportional gamma counter. It then converts the count and incoming gamma wavelengths into dose rate.
Not sure on the price question. There are a huge range of standalone dosimeters out there. Some are cheap, some are expensive. I would guess it comes down to reliability and range of function.
Yeah, there are a lot of crap prank apps about this. The one I use (Here) for android has a cal chart from a cesium source; it cost $5.
It can work as a geiger counter (iphone).
https://play.google.com/store/apps/details?id=com.rdklein.radioactivity&hl=en_US
Here is a app that tests for radioactivity using your cell phone camera. They're actually pretty close to the geiger counter for radioactivity and you don't really need to know much other than if it is radioactive if you're collecting.
You mean this actual, fully functional Geiger counter app?
I wouldn't trust any numbers from it, but it works. Cover the camera to block out light and the CMOS sensor can detect charged particles that make it though. It is really only useful for gamma radiation.
https://play.google.com/store/apps/details?id=com.rdklein.radioactivity&hl=en
It would show, but more even and probably as colored pixels.
There's even an app that turns camera sensor into radiation counter - you cover the lens with black tape, and it counts those pixels.
You'd get a car wreck.
I'm seriously still baffled as to why these types of questions are so common and popular. As if they already imply a sort of expected answer - to suggest there's something special (rather, "specially dangerous") that can happen to nuclear reactors.
I suppose a more straight answer is this: If the reactor vessel ruptures, it might become dangerous to go near the wreck. This isn't anything remarkable or special, not to say "normal" car wrecks are also dangerous to go near due to a fire hazard.
One might imagine that in a world where "nuclear cars" are ubiquitous, having a simple gamma detector on you would also be ubiquitous so you can tell when it's dangerous to go near something. This is in fact already the case because we all carry phones which have a CCD sensor (the camera) which can be used to detect gammas and even gauge dose rate. This is not a joke.
In terms of design you'd probably make it so the reactor compartment is strong enough to resist most crashes, which isn't a difficult problem. The appropriate shielding however, is... it would be too heavy to be worth it for a small car to be directly nuclear powered. Best I can imagine is a train, or a really big truck.
At the first view i had said its UO , many have this quarz lines inside but at the left side two botryoids are split in half, thats uncommon, normaly they brake away as one
If you have no counter but a smartphone get the app https://play.google.com/store/apps/details?id=com.rdklein.radioactivity
And follow instructions (tape camera with black tape, calibrate 10..15min...measure)
Uv light will show nothing on pure UO
„Lesser known“ as in „mentioned less than five times a day here“, yeah. Here are some actually lesser known.
Office Calculator — with tape/history and Xtra-Large™ Plus Button. Great for shopping at the mall.
Hacker's keyboard — useful for terminal, has all modifier keys and stuff.
Foxy Droid — a better F-Droid client.
Drony — allows using http proxies with authentication.
Time Buddy — tool for timezones
EnergyBar — displays battery as thin line at top of the screen.
Oh, and the jewel of my collection, Radioactivity Counter, an actually working radiation meter (uses phone camera as makeshift CCD sensor).
Yes- so although i said i bought a geiger counter, in reality i bought an app, which makes your smartphone into a geiger counter. Its a valid and proven app, which albeit not 100% accurate give a good indication of the radiation. It is called https://play.google.com/store/apps/details?id=com.rdklein.radioactivity&hl=en_US
And it works by covering your lens with black tape, thus reducing the chance of getting faulty readings by beta or light pollution.
My phone has been stationary positioned on my table, so its not due to it being in near proximity of radiation sources as these spikes only occur every 6-10 hours. The spikes always arise when im in the room, which he can hear, but whenever i leave the room and leave my phone counting it never shows these spikes, which i found quite upsetting.
The CPM was measured at a distance of 3,5 m from the wall to his room(source) and while this might not be astronomically large, i am afraid that if im standing right next to his room, the cpm would be in the range of 1000 or 10000. Most of my exposures have been at a distance to his room. But one of the times, i was positioned right next to the wall, and i could, literally, feel the heat in my testes and lower abdomen - i still can. And this is the exposure i am the most worried about. My skin has tightened on my right side of face and abdomen as well, while the part the furthest away has a more usual tonus.
Or, if you are trying to save money this xmas season, you can use a piece of electrical tape and your smartphone: https://phys.org/news/2014-06-smartphone-detector-app-positive.html
https://play.google.com/store/apps/details?id=com.rdklein.radioactivity&hl=en
<edit> spelling
There are apps to make a smartphone a geiger counter. The camera is able to measure gamma radiation as white pixels will show on the display for a gamma ray that hits the camera..
https://play.google.com/store/apps/details?id=com.rdklein.radioactivity&hl=de
So i actually used this app (which works surprisingly well) and a GM tube I borrowed from work. It would be a pain in the ass to drag everything from home to work and back to use the scintillation counter we have here.
There's an app for that https://play.google.com/store/apps/details?id=com.rdklein.radioactivity
Yep, radioactivity detection is possible, someone even made an app for it.
There's this one for Android: https://play.google.com/store/apps/details?id=com.rdklein.radioactivity
Not sure on the accuracy but it seems like it might work.
Some people just don't stay up with the latest gadgets!