The wavelength of a neutron can be determined using the de Broglie wavelength formula, which relates the wavelength of a particle to its momentum. The formula is:
Wavelength = Planck's constant / (mass of the particle x velocity)
For a neutron, the mass is approximately 1.675 × 10^-27 kilograms. However, neutrons do not have a fixed velocity. Their velocity can vary depending on factors such as their energy and the medium through which they are traveling.
If you provide the velocity of the neutron, I can help you calculate the corresponding wavelength.