October 16, 2015, Physics 8, 100
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http://physics.aps.org/articles/v8/100
Abstract
A new technique borrows a trick from MRI scanners to make precise magnetic measurements with ultracold neutrons. A new technique measures the range of energies in a cloud of ultracold neutrons and also detects variations in the magnetic field applied to the cloud with an unprecedented degree of sensitivity. The method uses a trick borrowed from medical imaging and could significantly benefit experiments searching for a neutron electric dipole moment, which in turn could reveal why there is an imbalance between matter and antimatter.