Raman vibrational spectral characteristics and quantitative …
2018年6月29日 · In this study, the Raman characteristics of gaseous and dissolved H 2 were researched at 0–400°C and 0–40 MPa in detail, which cover most deep-sea hydrothermal environments. The strong density and temperature dependences of the wavenumber and bandwidth of gaseous hydrogen vibrational Raman bands were observed.
Stimulated Raman scattering metrology of molecular hydrogen
2023年4月11日 · Our comb-calibrated stimulated Raman scattering spectrometer extends the toolkit of optical frequency metrology as it can be applied, with simple technical changes, to many other...
Understanding high pressure molecular hydrogen with a ... - Nature
2020年10月6日 · Raman spectroscopy shows peaks corresponding to quantum rotors at low pressure, which gradually broaden and shift with pressure, and a distinctive sharp phonon mode which rules out cubic close...
Raman line positions in molecular hydrogen: H2, HD, HT, D2, …
1987年2月1日 · Spontaneous Raman spectroscopy is used to determine line positions of the six isotopomers of molecular hydrogen: H 2, HD, HT, D 2, DT, and T 2. State populations as low as 1.3 × 10 8 are detected with the present experimental apparatus.
Stimulated Raman Spectroscopy of H2 with Absolute Frequency Calibration
Abstract: H 2 is the simplest neutral molecule in the universe and it is a benchmark system for testing quantum electrodynamics and physics beyond the standard model via highly accurate measurements of its transition frequencies [1-3], However, the retrieval of unperturbed transition frequencies is hampered by the weakness of quadrupole transiti...
High-Precision Trace Hydrogen Sensing by Multipass Raman …
2023年4月29日 · Raman spectroscopy is an alternative optical technique that can be used for hydrogen detection. It is non-invasive with high selectivity, enabling hydrogen detection in complex gas mixtures [24,25,26,27].
Raman Spectroscopy and Cage Occupancy of Hydrogen …
2009年9月23日 · Statistically averaged Raman spectra of H2 in hydrogen clathrate are calculated by quantum-mechanical calculations and molecular dynamics simulations. The result shows that the H2 molecules in the ...
2D Raman imaging for vibrational and rotational temperature mapping in H2
We showcase a Raman scattering diagnostic for 2D imaging of the rotational and vibrational temperatures of H 2. Applications include environments with vibrational-rotational non-equilibrium such as H 2 -containing supersonic jets and plasma reactors.
Stimulated Raman Spectroscopy of H2 with absolute frequency …
H 2 is the simplest neutral molecule in the universe and it is a benchmark system for testing quantum electrodynamics and physics beyond the standard model via highly accurate measurements of its transition frequencies [1-3].
Comb-calibrated Stimulated-Raman Spectroscopy of H2
H2 is a benchmark system for fundamental physics, yet spectroscopy is hindered by the lack of dipole moment. We present a comb-calibrated coherent Raman spectrometer for advanced studies of its Q1 1-0 line