How much neutronium and anti-neutronium would be needed?

Who is like God arbour · Post by **Who is like God arbour** » Wed May 23, 2007 12:05 pm

Assume, that there is neutronium, which can be taken out of a neutron star!
Assume, that there is anti-neutronium to this neutronium!

How much (mass and volume) neutronium and anti-neutronium have to annihilate each other to release 1E38 joules energy?

l33telboi · Post by **l33telboi** » Wed May 23, 2007 1:06 pm

E=mc^2 would tell you how much mass you'd need, unless there's something funky about the mass Neutronium (except it being super-dense, of course).

How much volume that mass would take up i wouldn't know though.

Estrecca · Post by **Estrecca** » Thu May 24, 2007 12:03 pm

1.1E21 kg or 1.1E18 tons. Roughly the mass of the asteroid Ceres.

Real life Neutronium has densities of 8E13 kg/m^3-2E15 kg/m^3, according to Wikipedia, suggesting that 13.8 million cubic meters at a minimum and 550.000 cubic meters at a maximum would be needed to store that much neutronium.

Nonamer · Post by **Nonamer** » Fri May 25, 2007 12:19 am

Density is 4 * 10 ^ 17 kg/m^3 according to that site. So (1.1e21 kg) / (4e17 kg/m^3) = 2750 m^3. Cube rooting it gets you a cube ~14.01 m on a side.

Who is like God arbour · Post by **Who is like God arbour** » Tue Jun 05, 2007 12:04 pm

That's why I have asked this question.

SailorSaturn13 · Post by **SailorSaturn13** » Sun Jun 10, 2007 1:31 am

Nonamer wrote:Density is 4 * 10 ^ 17 kg/m^3 according to that site. So (1.1e21 kg) / (4e17 kg/m^3) = 2750 m^3. Cube rooting it gets you a cube ~14.01 m on a side.

The latter is correct, given that a neutron star has a diameter of 20-50 km and mass of 2-4*10^30 kg*(with heavier stars having SMALLER diameter!!).