{'fraction_non_alphanumeric': 0.025495750708215296, 'fraction_numerical': 0.02077431539187913, 'mean_word_length': 4.7923497267759565, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Phonon anomalies and local atomic displacements in the exchange-enhanced superconductor U6Fe.

Moessbauer effect and neutron-diffraction measurements have been made as a function of temperature on the exchange-enhanced superconductor U/sub 6/Fe. Non-Debye behavior is observed in the thermal mean-squared displacement of Fe with the Debye temperature changing from THETA/sub f/approx. =320 K above 100 K to THETA/sub f/approx. =400 K below 80 K. Changes in the Moessbauer shift below 100 K are attributed principally to electronic-structure changes of the Fe atom which lead to a small increase in the number of d electrons and a concomitant reduction in the number of s electrons. The neutron-diffraction results indicate a pronounced anisotropy in the unit-cell thermal expansion and below 100 K an anomalous temperature dependence for the c-axis component of the total Debye-Waller factor of Fe. These observations taken together imply that along the c axis, static displacements of the Fe atoms begin around 100 K and increase with decreasing temperature.