The effect of core geometry constraints hydrogenase H-cluster analogues on reduction chemistry have been explored by a combination structural, electrochemical and IR spectroelectrochemical (IR-SEC) studies. A series phosphido-bridged diiron hexacarbonyl complexes, Fe2(µ2-PPh2(CH2)xPPh2)(CO)6, x = 2 (2P) 4 (4P) previously reported with 3 (3P) the unlinked bis-diphenylphosphido (DP) were investig...

Magneto optical trap recoil ion momentum spectroscopy is used to measure energy-dependent charge exchange cross sections in the Cs + Rb(5s,5p) system over a range of projectile energies from 3.2 keV to 6.4 keV. The measurements are kinematically complete and yield cross sections that are differential in collision energy, scattering angle, and initial and final states. PACS numbers: 34.70.+e, 34...

Mass spectra of C(CI-I3)" Si(CI-I3)" Ge(CI-I3)" Sn(CI-I3)" and Pb (CI-Ia), were obtained with a Consolidated 21103 mass spectrometer. I sotopic abundan ces of carbon , si licon , germanium, tin, and lead were obtained from t he observed spectra and used to calculate the monoisotopic spectra. The mass spectra of t he Group IV tetramethyls a re qualitatively similar. The principal ion in each cas...

Optical absorption spectra from silicon-implanted silica slides are shown to contain features due to optical interference. These features, which result from the modified refractive index profile produced by the implant, can readily lead to misinterpretation of absorption spectra. To demonstrate the importance of such effects, silica samples were implanted with 80, 400, and 600 keV Si ions to fl...

In an effort to elucidate the variation of the electronic structure as a function of oxidation and composition, we investigated an extensive series of dichromium oxide clusters, Cr2On- (n=1-7), using photoelectron spectroscopy (PES). Well-resolved PES spectra were obtained at several photon energies. While low photon energy spectra yielded much better spectral resolution, high photon energy dat...

Focusing on recent measurement of $B^+ \to D_s^+D_s^-K^+$ process given by the LHCb Collaboration, we propose that this newly observed near $D_s^+D_s^-$ threshold enhancement can be due to contribution $\chi_{c0}(2P)$, which is a $P$-wave charmonium below threshold. By performing combined fit measured $D_s^+D_s^-$, $D_s^+K^+$, and $D_s^-K^+$ invariant mass spectra, introducing $\chi_{c0}(2P)$ w...

This work presents N, O K-edge x-ray absorption near-edge structure sXANESd and Ta L3-edge extended x-ray absorption fine structure sEXAFSd studies of amorphous TasN,Od films prepared with various flow rate ratios of N2/O2. The N and O K-edge XANES and Ta L3-edge EXAFS spectra demonstrate the presence of N2 molecules. These spectra also show that TasN,Od films have similar local atomic structur...

The authors have identified an error in Figure 4. In the original article, 4 b mistakenly shows 12 a. correct version of appears below. confirm that these changes do not affect results or conclusions. apologize for and any inconvenience caused. XPS spectra fresh CuO catalysts calcined at different temperatures. a) Cu 2p profile; b) O 1s c) distribution oxygen species.

Two-body open charm strong decays of the $2P$ and $3P$ charmonium states are studied by Bethe-Salpeter(BS) method combined with $^3P_0$ model. The wave functions mass spectra obtained solving BS equation relativistic correction. decay widths relative ratios calculated. Comparing our results experimental data, we obtain some interesting results. Considering $X^*(3860)$ as $\chi_{c0}(2P)$, total ...

Experimental evidence for the correlated two-electron one-photon transitions (1s(-2)→2s(-1)2p(-1)) following single-photon K-shell double ionization is reported. The double K-shell vacancy states in solid Mg, Al, and Si were produced by means of monochromatized synchrotron radiation, and the two-electron one-photon radiative transitions were observed by using a wavelength dispersive spectromete...