Uranium Definition and 155 Threads

I'm working on a theoretical analysis of a thin 232U UO3 aerogel layer (5-20nm feature size, granular, crystalline, ~98% porosity) in a vacuum in GEANT4, with the desired goal of losing most of the 220Rn (and thus the hard gamma from 208Tl and the residual 208Pb mass). GEANT4 handles the...

I just looked a little bit into how Nuclear power plants work out of curiosity, and I saw that the Uranium they use is U-235, but when I was looking at a website, it said that the Uranium required 3% or higher content of U-235. I wasn't sure if this was correct so I dug a bit deeper at the...

Hi all, I am trying to derive a relation (as function of temperature) for the coefficient of linear thermal expansion (CLTE) strating from a correlation for the density. But I'm getting a huge discrepancy from the experimental data. I'll start telling you some reasoning I did to get a relation...

Kinetic energy = 1/2 m V^2 I was thinking about this and thought another formula… E = mc^2 These look very similar except for the multiplication by 1/2. Let’s say you take a kilogram ball of uranium and accelerate it to the speed of light. I know, I know. You can’t. But let’s say you did...

I don't understand why the Uranium 238 ions are accelerated I think ##\Delta V = -2000 V## to accelerate since the ion would be accelerated by more postive charges so ## V_i > V_f ##

Hello, I am looking for a comprehensive resource (paper, book or any kind of document) that contains the most relevant properties of most nuclear fuels. To be more specific, the information i am looking for are thermophysical properties, chemical compatibility with other materials and...

https://getpocket.com/explore/item/these-people-love-to-collect-radioactive-glass-are-they-nuts It talks about uranium giving off "alpha waves/rays" & "beta waves/rays", and an isotope of U-308. My understanding is that alpha & beta radiation is particle in nature whereas gamma radiation is a...

I'm learning about nuclear fission for fun, well based on my research, 82% of the time that uranium-235 absorbs a neutron it will fission, the uranium-235 will briefly turn into an excited uranium-236 and after that, it will split, the other 18% of the time it will just emit radiation and...

I have a simple question. Do alpha particles from radiation arc and fall after leaving its source? Are these particles bound by the same gravitational laws as us?

Hello! I'm currently building a cloud chamber, my end goal is to make it powered by Peltier chips but that won't happen until I can make it work with dry ice. I've been able to achieve a supersaturated layer of isopropyl alcohol in the chamber, however, even with very radioactive uranite...

Howdy partners! I am currently doing some project on Klt40s neutronic simulation (you might have heard of Akademik Lomonosov, the floating npp). But I have encountered a problem with fuel density. The only info that i got that "uranium density IN FUEL MEAT/KERNEL" is 4.5 g/cm3. The Fuel is...

Summary:: Calcul of dose rate. Hello everyone ! I have to calculate the total dose that an operator takes during different tasks in a workshop. . I must not use numerical software, so it's only calculous with the data I have. My question could be considered as stupid but the engineer in...

Why is terbium's electron configuration [Xe] 6s2 4f9, with no electrons in the d subshell and one extra in the f sub shell, while uranium's electron configuration is [Rn] 7s2 5f3 6d1, with one electron in the d subshell and none extra in the f subshell? Are lanthanum and actinide d block...

I cannot find a source of uranium glass beads/wands for art making. It is mentioned online that one can make UV glass with a derivative of uranyl nitrate, UO2(NO3)2 . Does anyone know a source of uranyl nitrate, or raw glass material, and what are the minimum safety protocols, such as...

Summary:: How do high-enriched uranium reactors compare with low-enriched uranium reactors? Hello, I'm doing some research for a book, and there's some information about fission reactors I just can't find. I am comparing HEU fission reactors with LEU fission reactors ... even ballpark figures...

Why is Uranium-236 less stable than Uranium-235 and Uranium-238?

I am studying how to determine the nuclear charge radius from direct measurement of the Coulomb energy differences of nuclei. My book says that there is strong evidence which suggests that the nuclear force does not distinguish between protons and neutrons. Thus changing a proton into a...

Homework Statement U - 238 is undergoing alpha emission into Th - 234. U - 238 has half – life of 109 years. Calculate the emission rate of alpha when uranium has mass of 10 grams Homework Equations A = λN A = A0 (1/2)n , n = t / half - life The Attempt at a Solution Not sure how to do it but...

Me again, with another potentially ignorant nuclear science question: Why isn't tungsten used to prevent meltdown in nuclear reactors? If tungsten has a higher melting point of tungsten is almost 6200 degrees Fahrenheit, and nuclear meltdown happens when the uranium fuel is some 5200 degrees...

On the page https://en.wikipedia.org/wiki/Isotopes_of_uranium, some of the superscripts have, besides the atomic number, also an "m". For example, besides the usual isotope 234U with spin 0+, there is also the isotope 234mU (with nuclear spin 6-). What is this "m"? While I am at it, what is the...

Depleted uranium is often used for applications in which high density is valued, such as counterweights, tank armor, and armor-piercing ammunition. Obviously there are going to be some differences between depleted uranium (defined as having 0.3% or less U-235) and natural uranium (averaging...

Homework Statement Energy released is 5.6MeV, 5kW is produced, Half life = 87.7 years for Uranium Need to find how many kg you need to produced that much power. Homework Equations E = Pt, Q = (mass defect) * 931.5MeV/c^2 The Attempt at a Solution I solved for the energy released to be...

Hello, I was wondering if the resources needed to extract some amount of a mineral from ore goes up in way proportional to the percentage that mineral makes up of the ore. I'm not sure I'm expressing things clearly so I'll give an example. Let's say you have three ores. The only major...

In Wikipedia I read that Uranium-235 is a nuclear is fuel in fission reactors, also that Uranium-235 is split (fission) and energy is revealed. But in some images showing how nuclear reactors work, they show Uranium dioxide as nuclear fuel elements. In Wikipedia, it's written that the oxides...

Homework Statement Analyzing a rock sample, it is found that it contains 1.58 mg of 238U and 0.342 mg of 206Pb, which is the stable final product of the disintegration of 238U. Assume that all 206Pb found comes from the disintegration of 238U originally contained in sample. How old is this...

According to the following website listing the yields of fission products for Uranium and other transuranic isotopes: https://www-nds.iaea.org/sgnucdat/c3.htm The fission product 63-Eu-155 is rare but not impossible. According to my maths, this means there must be another daughter nuclei with...

I read that one can find Uranium for its gamma radiation hence gamma can travel through even dense and thick stuff, but natural Uranium that hasn't gone through fission doesn't emit gamma correct, so I was reading how they find Uranium reserves underground and it says that they use a alpha...

I am doing a study guide for a nuclear chemistry introductory course FINAL EXAM. A few of the questions have me confused because, although they are asked in a multiple-choice format, the prof. has indicated that multiple choices may be correct for given problems and that you must not only choose...

Hello Why the uranium glass glows green if it's under UV light? The most accurate thing I have found it's a brief history of uranium glass: somewhere it's said the more uranium oxide you put in the glass, the more intense will be the green light when exposed to UV light. Thank you for your...

Apparently there is a major uranium deposit at Orkney in the United Kingdom that might also be very high grade (the article seems to indicate it is 50.2% grade, which would be even higher grade than Canada's deposits). I've found a lot of information on the controversy surrounding potential...

I was researching on radioactive elements and found out that polonium is the most radioactive element and the most radioactive isotope of polonium (out of 33!) is polonium 210. So I was wondering why it isn't used in nuclear plants and bombs. I know that if a slow neutron was to hit uranium 235...

why uranium does not have any stable isotope?

Now I'm familiar with how nuclear fission works to produce thermal energy and alpha/ beta/gamma radiation, but how do they work in the bomb? When is the high energy neutron fired into the uranium-235, and when does the chain reaction producing the heat begin? Why is it that there's a huge...

The conventional commercial fission reactors use uranium-235 as fuel. Its cross section of (n, fission) reaction at thermal neutron is about 585 barns. My question is: Is there a known threshold of the cross section that makes a nuclear reaction not sustainable if the minimal cross section is...

Hi! I am a big fan of science fiction, military fiction and all sorts of media covering this kind of topic. :smile: So I have played Metal Gear Solid V: The Phantom Pain and in it there is this plot device called metallic archaea that basically enriches uranium quite easily. This invention...

Is there a trend in pebble bed reactors towards smaller pebble sizes? The smallest conceivable would be a carbon buckyball encasing a (single?) uranium atom. This Wikipedia article (https://en.wikipedia.org/wiki/Endohedral_fullerene) says two cerium atoms have been encapsulated in a c80...

Found this recently. Anyone know where it came from and what I can or should do with it? Thanks.

If it does, why is that so?

I was wondering if anyone could give me some insight as to what I found at my work the other day. We have old chemicals (some REALLY old) that turn up in random cabinets from time to time, and this time I was a bottle with a mostly-decayed label where the only thing that could be read was...

Homework Statement A uranium-238 atom can break up into athorium-234 atom and a particle called an alpha particle, α-4. The numbers indicate the inertias of the atoms and the alpha particle in atomic mass units (1 amu = 1.66 × 10^−27 kg). When an uranium atom initially at rest breaks up, the...

First of all, let me say I'm not a physicist, an undergrad, study physics or have any particular education surrounding physics. I'm actually simply a photographer with a special interest in science - so if possible, keep any answers simple. Right, so I was reading about the fission of U235, and...

No, I'm not asking if I *should* handle it, just what my level of concern ought to be in regards to being around this stuff. My physics department hired me to clean up one of the labs they want to start using again. I opened one of the cabinets and saw a pair of small glass stoppered and...

I do not know if uranium monoxide exists or not because I can't find anything about it on the internet, but i can make a lewis dot structure of it. Can somebody help about this?

Homework Statement So I'm looking at the radiation exposure risk regarding depleted uranium (U-238) and nuclear waste (4.20% U-235, 95.8% U-238). Yes I know these compositions are incorrect; they're close enough to exact for my purposes. The only information I have is the half lives of the...

Homework Statement Naturally occurring uranium contains 0.7% ##\;^{235}U## and 99.3% ##\; ^{238}U## . To enrich it one uses a method based on repeated effusion. a) Consider a step in this process. In a container, which is divided in two parts by a porous plug, one part contains natural uranium...

Why is U-235 better for fission than U-238, i was reading that when a neutron strikes U-235 than it create U-236 which has an even number of nucleons, so it can break apart evenly. When the neutron strikes the uranium it causes it to oscillate and then it breaks apart. Is this like have a...

Homework Statement (This isn't a typical problem here so feel free to suggest an alternative forum category or website.) I'm trying to do research for a paper about nuclear waste and depleted uranium storage by the DOD. I have a lot of questions I need to answer before I can get too far into...

Homework Statement Calculate the activity of ##^{222}Rn## in an ore sample containing 5g of natural uranium. Homework Equations ##^{238}U## decay chain (to Radon): ##^{238}U\rightarrow^{234}Th\rightarrow^{234}Pa\rightarrow^{234}U\rightarrow^{230}Th\rightarrow^{226}Ra\rightarrow^{222}Ra##...

This article http://www.technologyreview.com/news/530981/new-nuclear-fuel-could-boost-reactors-but-also-safety-worries/ about new fuel rod design with better heat transfer than traditional designs reminded me of how diamonds are being used in electronics...

so I am taking a quantum mechanics course, we started taking about dispersion. so he the lecturer gave us an example about the fission of uranium by alpha ray... he said that we should place a detector in order to detect the alpha particlee , but the detector can only detect particlees with...