Accurate Mössbauer line-shape measurements including interference inW182,

Abstract

We have made precise final state interference measurements using very intense Mossbauer sources and an exact line-shape analysis. Two transitions in tungsten metal, as well as one in iridium metal and one in terbium oxide, have been studied. The interference parameters 100P found are -1.3 (3) for the 99.1-keV transition in W, -1. 2(1) for the 100.1-keV transition in W, -0.71(8) for the 129.4-keV transition in 'Ir, and -0.48(5) for the 58.0-keV transition in ' Tb. All values agreed with theory to within error. Our measurement of 1.16(2) cmjs for the ' 'Ir linewidth agrees with other Mossbauer measurements and shows no indication of hyperfine broadening, but disagrees with some non-Mossbauer measurements reported in the literature. The tungsten and terbium transitions also show no signs of broadening or splitting.PACS number(s): 23.20.Nx, 27.70. +q, 27.80.+w

Mössbauer diffractometry on polycrystalline57Fe3Al

“…There have been many other studies of coherent interference in Mössbauer scattering. [2][3][4][5][6][7][8][9] In almost all of these studies, a detector was placed at a few angles near a Bragg peak, and an energy spectrum was measured. This was the method used in experiments by Kovalenko et al 10 and Nakai et al 11,12 who measured interference effects between Mössbauer nuclei having different hyperfine fields.…”