Suppose a gas of 87 Rb atoms is trapped in an atomic trap. If the average separation between nearest neighbour atoms in the trap is approximately (a) 100 times or (b) 10 times the atomic radius (265 pm), find the temperature at which you would expect Bose-Einstein condensation to occur. Make the same calculation for 23 Na (atomic radius 190 pm). Give your answers in Kelvin.

Suppose a gas of 87 Rb atoms is trapped in an atomic trap. If the average separation between nearest neighbour atoms in the trap is approximately (a) 100 times or (b) 10 times the atomic radius (265 pm), find the temperature at which you would expect Bose-Einstein condensation to occur. Make the same calculation for 23 Na (atomic radius 190 pm). Give your answers in Kelvin.