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Title: GR9677.034
Post by: conantee on December 07, 2010, 12:09:17 AM
34. When the beta-decay of ^{60}\mbox{Co} nuclei is observed at low temperatures in a magnetic field that aligns the spins of the nuclei, it is found that the electrons are emitted preferentially in a direction opposite to the ^{60}\mbox{Co} spin direction. Which of the following invariances is violated by this decay?
(A) Gauge invariance
(B) Time invariance
(C) Translation invariance
(D) Reflection invariance
(E) Rotation invariance