"""This is the place for useful constants about Sr or the experiment"""

sigma0 = 1.015*10**(-13)  # m^2
mass = 87.906*1.661*10**(-27)  # kg

pixelSizeDict = {"horizontal": 3.72*10**(-6),
                 "grating": 4.8*10**(-6)*2}  # m/pix including magnification
