Analysis of high-resolution spectra from a hybrid interferometric/dispersive spectrometer
- The Pennsylvania State Univ., University Park, PA (United States)
- Idaho National Lab. (INL), Idaho Falls, ID (United States)
To more fully take advantage of a low-cost, small footprint hybrid interferometric/dispersive spectro-meter, a mathematical reconstruction technique was developed to accurately capture the high-resolution and relative peak intensities from complex spectral patterns. A Fabry–Perot etalon was coupled to a Czerny–Turner spectrometer, leading to increased spectral resolution by more than an order of magni-tude without the commensurate increase in spectrometer size. Measurement of the industry standard Hg 313.1555/313.1844 nm doublet yielded a ratio of 0.682, which agreed well with an independent mea-surement and literature values. The doublet separation (29 pm) is similar to the U isotope shift (25 pm) at 424.437 nm that is of interest to monitoring nuclear nonproliferation activities. Additionally, the technique was applied to LIBS measurement of the mineral cinnabar (HgS) and resulted in a ratio of 0.682. This reconstruction method could enable significantly smaller, portable high-resolution instru-ments with isotopic specificity, benefiting a variety of spectroscopic applications.
- Research Organization:
- Idaho National Lab. (INL), Idaho Falls, ID (United States); Univ. of Michigan, Ann Arbor, MI (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE); USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- AC07-05ID14517; NA0002534
- OSTI ID:
- 1234471
- Alternate ID(s):
- OSTI ID: 1359716; OSTI ID: 1367668
- Report Number(s):
- INL/JOU-15-36165
- Journal Information:
- Optics Communications, Vol. 357, Issue C; ISSN 0030-4018
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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