61–70 of 83 posts
This is not the title of the article, and it should be changed. Besides, what's kph?
The given title here is much more informative than the article title of "WA outback proves no match for Aussie nuclear know-how". > Besides, what's kph? Kilometres per hour.
It's in violation of HN guidelines.
Earlier quoted context omitted.
It's not too amazing. Perth has a few companies that do this work for a living - as a grind job, flying contracts for an actuall million line kilometres of 256 channel radiometric mapping at anything from $7 to $15 AU per line kilometre for mineral exploration. This has been ongoing for 50 years (see: Radiometric Map of Australia) and I'm slighlty baffled why a plane wasn't flown along the road on day one. Realistic…
What I don't understand is, what kind of technology is it? It is obviously great. The technical explanation is not there
https://radiascan.com/products/detector-of-ionising-radiatio...
The waiting time is few months, so I hope the toy arrives eventually.
Cool use of gamma-ray imaging technology! The underlying technology is a coded aperture to give a random response on the detector that can be used to reconstruct the direction of the gamma-ray source. I think they are using a moving mask with a single detector in the middle. They probably didn't know if the source had broken apart and caused more contamination when they found the general area. So the imaging allows y…
Earlier quoted context omitted.
I want to know this other story, I haven't found it by cursory search - what should I be searching for?
Pokhran-II was a series of five nuclear bomb test explosions conducted by India in May 1998, Pakistan responded with six underground nuclear tests at the Chagai and Kharan test site conducted fifteen days after India's last test. It was all abit unexpected at the time and the US was interested to know how it came to be that Australians were present.
Do gamma rays bounce back on a rock or do you need line of sight to capture the source? If it is the latter they were very lucky, effectively one small stone away from never being able to find it.
Gamma penetrates rocks, these sensors are used to help determine the density of rock by measuring how much was stopped by the material.
This is also why Gamma sources are so dangerous, because things like a coat, a car door are effectively "transparent" to them.
If there was just "one small stone" in front of the source it would almost be like it wasn't present at all.
Earlier quoted context omitted.
Pokhran-II was a series of five nuclear bomb test explosions conducted by India in May 1998, Pakistan responded with six underground nuclear tests at the Chagai and Kharan test site conducted fifteen days after India's last test. It was all abit unexpected at the time and the US was interested to know how it came to be that Australians were present.
I am sorry I am not following the connection between Pokhran-II nuclear tests and Australia. Would you mind sharing some more information or a link maybe?
Good job, but a lot of the reports really exaggerate the size of the search area. > in the formidable conditions of the outback... > It’s fair to say finding a piece of equipment the size of a button in a vast desert was no easy task Let's not go too far here. It was two metres from the road and they knew exactly which 1400km of roads to check.
This is more of an ANSTO PR piece to promote a new piece of kit [1] based on a recent paper [2]. I'm guessing they loved the opportunity to field test this in a sea of global public interest. What they're not actually saying is that the source in question could have just as easily been found using 1990s technology in a low flying aircraft at 70m/sec ( ~250 km/hr ) - once you get the target peaks (which were bright ag…
> What they're not actually saying is that the source in question could have just as easily been found using 1990s technology in a low flying aircraft at 70m/sec Well, yes. But it turned out, to everyone's relief, that the optimistic assumption held: the capsule was in fact still lying near the side of the expected road. It could have gone another way - it could have been picked up and moved elsewhere by vehicle tyre…