Rotational spectra have traditionally been measured without a concurrent means of differentiating the molecular constituents of the sample. Here, we present an all-optical multipulse experiment that allows the correlated measurement of rotational and mass or photoelectron spectra by combining Fourier transform rotational coherence spectroscopy with resonance-enhanced multiphoton ionization. We ...

We have produced laser-cooled Wigner crystals of 229Th3+ in a linear Paul trap. The magnetic dipole (A) and electric quadrupole (B) hyperfine constants for four low-lying electronic levels and the relative isotope shifts with respect to 232Th3+ for three low-lying optical transitions are measured. Using the hyperfine B constants in conjunction with prior atomic structure calculations, a new val...

Infrared spectroscopic observations have established the presence of hydrocarbon ices on Pluto and other TNOs, but the abundances of such molecules cannot be deduced without accurate optical constants (n, k) and reference spectra. In this paper we present our recent measurements of nearand mid-infrared optical constants for ethane (C2H6) and ethylene (C2H4) in multiple ice phases and at multipl...

The complete absolute configuration of goniodomin A, an actin-targeting polyether macrolide isolated from the marine dinoflagellate Alexandrium hiranoi, was established from analysis of ROESY experiments and coupling constants, synthesis of suitable model compounds for NMR spectroscopic comparisons, degradation experiments, and correlation with synthetic reference compounds.

We implemented the state-specific Brillouin–Wigner coupled-cluster method for the complete model space spanned by four reference configurations generated by two electrons in two active orbitals. We applied the method (together with the previously suggested a posteriori size-extensivity correction) to the calculation of spectroscopic constants of the IBr molecule, using averaged relativistic eff...

Spectroscopic techniques such as UV/vis, NMR, and Raman are powerful tools for the investigation of chemical speciation in solution. However, it is not widely recognized that such techniques do not always provide reliable information about ion association equilibria. Specifically, spectroscopic measurements do not in general produce thermodynamically meaningful association constants for non-con...

The optical and magneto-optical properties of the DyxCo1-x/Bi/NiFe three-layer systems are presented. Kerr effect to study temperature dependence magnetization spectroscopic ellipsometry obtain constants were used. It is shown that thickness bismuth interlayer affects exchange interaction between NiFe DyCo layers, which manifested in a change magnetisation compensation temperature.

We report an important correction to recently reported 12C16O2 transition frequencies and derived spectroscopic constants. A total of 44 previously corresponding transitions in the (30012 ← 00001) (30013 band with uncertainties as low 200 Hz are modified by including effect photon-absorption-induced recoil shifts. This shifting mechanism decreases all approximately 1.7 kHz.