Measurement of the Red Shift in an Accelerated System Using the Mössbauer Effect in Fe57 Hay, H. J. ; Schiffer, J. P. ; Cranshaw, T. E. ; Egelstaff, P. A. Abstract Publication: Physical Review Letters Pub Date: February 1960 DOI: 10.1103/PhysRevLett.4.165 Bibcode: 1960PhRvL...4..165H