Phys. Rev. Lett. 102, 145501 (2009) [4 pages]Quantitative Radiography of Magnetic Fields Using Neutron Spin Phase ImagingReceived 15 December 2008; published 9 April 2009 We report on a novel neutron radiography technique that uses the Ramsey principle, a method similar to neutron spin echo. For the first time quantitative imaging measurements of magnetic objects and fields could be performed. The strength of the spin-dependent magnetic interaction is detected by a change in the Larmor precession frequency of the neutron spins. Hence, one obtains in addition to the normal attenuation radiography image a so-called neutron spin phase image, which provides a two-dimensional projection of the magnetic field integrated over the neutron flight path. © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.102.145501
DOI:
10.1103/PhysRevLett.102.145501
PACS:
61.05.F−, 42.30.Rx, 75.25.+z
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