Recent content by Kritmiss

Thanks for the text, it was useful. However, I am still unable to arrive at the values for the transport mean free paths which were stated in my book on nuclear reactions, and I do not understand where your values come from. Thanks again for trying to help

Where do these values of 1-cos(theta) come from? If I use them, I obtain very different values of transport cross section than those in my book. These values of 1-cos(theta) give 1.14cm for water and 19.16cm for heavy water?

I have a book on nuclear reactions which details the mean free paths for thermal neutron scattering as: 0.37cm for water and 2.2cm for heavy water The transport cross sections are listed as 0.45cm for water and 2.6cm for heavy water. Does anyone know how to calculate these from the thermal...

A reactor fuelled with natural uranium would be your choice to make weapons grade plutonium. The design of fuel and moderator (which needs to be heavy water or graphite) is such that it maximises the production of plutonium, the irradiation time will determine the isotopic composition of your...

To try and provide you with something more tangible: If in your thought experiment your "reactor" is simply a sphere of fissile material then for a constant keffective, the product of density and system radius remains a constant. So, increasing the the density of your system, say, from 10 to...

Perhaps this helps? http://www.irradiationpanel.org/docs/publications/MonteCarloCode%20Review_2010Publication.pdf

For me it was sitting in chemistry class! We were being shown the periodic table for the first time and it was my introduction to physical chemistry - I couldn't believe that people had worked all this out, how the elements reacted with one another, why some would be radioactive and the...

Hello Kracatoan, Nuclear waste is produced in a number of forms: Highly active waste – this waste is in liquid form, the result of reprocessing. It requires shielding, constant cooling and has a corrosive chemistry. Vitrification stabilises this waste, tanks and pipework containing liquid...

I have done a search for you, this article gives useful information about the various fusion reactions and their cross sections, hopefully it will help. http://fds.oup.com/www.oup.co.uk/pdf/0-19-856264-0.pdf

Sounds painful, perhaps you should have thought about whether Heisenberg's Uncertainty Principle might have an effect on such a situation!:wink:

Because men are hardwired to want to be top dog! This is only natural as they want to attract us lovely ladies :!)

Basically as the title says, what type of fusion would give the highest number of neutrons for a given amount of power. The reaction between deuterium (D) and tritium (T) is the easiest to ignite and at any given temperature (up to a point) proceeds about ten times faster than the next...

The result of the decay of the plutonium would be an unusual isotopic mix of uranium with a little neptunium in there also, that would be good evidence lasting for long enough! A resource of U-235 for the distant future...?

Hello daisey, Some radioactive materials can decay by both alpha emission and a process called spontaneous fission - this is where neutrons are emitted when the nucleus splits apart spontaneously during radioactive decay. Examples of this are Pu-240 and Cf-252. Neutrons may also result from any...