Refractive Index of BEC: Exploring Its Potential for X Rays and Gamma Rays

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Does a BEC still have a very large refractive index for X Ray's and gamma rays?
 
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The refractive index for x-rays and gamma rays depends essentially only on the electron density. As BECs are just very cold gasses with a not so high density, the refractive index will be very close to 1, just as for any other gas.
 

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