Trends in Mössbauer emission spectroscopy of57Co/57Fe

Elastic and inelastic diffraction of fast atoms, Debye-Waller factor, and Mössbauer-Lamb-Dicke regime

“…At a single particle level, it is more convenient to define Mössbauer-Lamb-Dicke factor as a probability for recoilless emission. This is illustrated in Mössbauer spectroscopy where γ rays are absorbed by iron nuclei in a crystal [27], in spectroscopic line narrowing at high pressure [28] or in Doppler free interaction of light with cold atoms in an optical lattice [29].…”

Aspartic acid interaction with cobalt(II) in dilute aqueous solution: A 57Co emission Mössbauer spectroscopic study

“…For both the spectrum of the frozen aqueous solution and that of its dried residue, the best fit was achieved using three components, with two quadrupole doublets representing different high-spin daughter ferrous forms stabilised after the 57 Co→ 57 Fe nuclear transition (see Table 1). The residual 57 Fe III , which accounts for less than 10% of the spectral area in each spectrum, is due to after-effects [3,5,6]. Note that the resulting species under study using EMS may be described as an 57 Fe complex substituted for the 'parent' 57 Co binding site (retaining its geometry) [6].…”

“…The positions of the two main doublets (1 and 2; shaded areas) corresponding to daughter 57 Fe II forms (see Table 1, sample "Dried residue") are shown above the spectrum (the third weaker narrow doublet corresponds to daughter 57 Fe III resulting from after-effects of the 57Co→ 57 Fe transition) metalloenzymes, where usually a few amino acid residues form a specific cationbinding site [1,2]. As for 57 Co emission Mössbauer spectroscopy (EMS), which has so far been rarely used in biological research [3][4][5], such studies are also necessary to form a database for a reliable interpretation of EMS data obtained for more complicated biological systems [4][5][6].…”

Electron trapping centres and cross sections in LiNbO3studied by57Co Mössbauer emission spectroscopy

“…Eventually, the nucleogenic * Fe is left in a highly ionized state up to 7+ [11]. This results in a variety of chemical and physical aftereffects in the surrounding lattice and in the nucleogenic ion's electron shell [10,[12][13][14][15][16]. In metals, the highly charged ionic state relaxes before the Mössbauer level of the nucleus is populated, but in semiconductors and insulators metastable ionic species have often been observed by MES [2,17].…”