Energy calibration issues in nuclear resonant vibrational spectroscopy: observing small spectral shifts and making fast calibrations. (24th September 2013)

• Record Type: Journal Article
• Authors: Wang, Hongxin; Yoda, Yoshitaka; Dong, Weibing; Huang, Songping D.
• Is Part Of: Journal of synchrotron radiation. Volume 20:Part 5(2013)
• Page Start: 683
• Page End: 690
• Publication Date: 2013-09-24
• Subjects: Synchrotron radiation -- Periodicals; Free electron lasers -- Periodicals; 539.73505
• DOI: 10.1107/S0909049513021201
• Languages: English
• ISSNs: 0909-0495

Abstract

<abstract abstract-type="main" xml:lang="en"> <title> <x xml:space="preserve">Abstract</x> </title> <p>The conventional energy calibration for nuclear resonant vibrational spectroscopy (NRVS) is usually long. Meanwhile, taking NRVS samples out of the cryostat increases the chance of sample damage, which makes it impossible to carry out an energy calibration during one NRVS measurement. In this study, by manipulating the 14.4 keV beam through the main measurement chamber without moving out the NRVS sample, two alternative calibration procedures have been proposed and established: (i) an <italic>in situ</italic> calibration procedure, which measures the main NRVS sample at stage A and the calibration sample at stage B simultaneously, and calibrates the energies for observing extremely small spectral shifts; for example, the 0.3 meV energy shift between the 100%‐⁵⁷Fe‐enriched [Fe₄S₄Cl₄]⁼ and 10%‐⁵⁷Fe and 90%‐⁵⁴Fe labeled [Fe₄S₄Cl₄]⁼ has been well resolved; (ii) a quick‐switching energy calibration procedure, which reduces each calibration time from 3–4 h to about 30 min. Although the quick‐switching calibration is not <italic>in situ</italic>, it is suitable for normal NRVS measurements.</p> </abstract>