Articles you may be interested inIn situ investigations of the metal/silicon reaction in Ti/Si thin films capped with TiN: Volumetric analysis of the C49-C54 transformation A kinetic study of the C49 to C54 TiSi2 conversion using electrical resistivity measurements on single narrow lines J. Appl. Phys. 78, 7040 (1995); 10.1063/1.360407 C49/C54 phase transformation during chemical vapor deposition of TiSi2

Tunneling–rotational transitions of water dimer with K=0 have been observed and assigned in the radio frequency and microwave region of the spectrum. Rotational constants and electric dipole moments were obtained from these spectra. The rotational constants show surprisingly large variations with tunneling state for (H2O)2, but not for (D2O)2, indicating that the former species may be following behavior characteristic of a low-barrier tunneling case. A tunneling splitting of 19 526.73 MHz has been observed for water dimer and 1172.23 MHz for the completely deuterated species. The nuclear hyperfine structure of (H2O)2 radio frequency transitions has been assigned and was quite useful for determining the symmetries of the observed states. The nuclear spin–spin coupling constants have been interpreted in terms of the tunneling state of observation and of the water dimer structure.

Guided-ion beam mass spectrometry is used to probe the reaction of CS+2 with Xe as a function of ion kinetic energy from thermal to 16 eV. S+, CS+, and Xe+ are the only observed reaction products. Formation of S+(4Su) is observed, even though it is spin forbidden, providing evidence for the importance of spin–orbit coupling in the dissociation of CS+2. The threshold for formation of S++CS, 4.74±0.04 eV, leads to a heat of formation of the CS radical ΔfH00(CS) of 65.8±0.9 kcal/mol. From this value, we derive the bond energies D00(CS)=169.8±0.9 kcal/mol, D00(S–CS)=103.8±0.9 kcal/mol, and D00(O–CS)=158.7±0.9 kcal/mol. The onset for production of CS+ by collision-induced dissociation of CS+2 is observed at 6.16±0.07, 0.40 eV above the thermodynamic threshold, but coincident with the threshold for excitation to the C̃ state of CS+2. The cross section for charge transfer to form Xe+ displays a threshold of ≊2 eV, corresponding to the difference in ionization energies of Xe and CS2. This process is significantly enhanced at higher energies where the concomitant dissociation of CS2 to CS and S becomes accessible.

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Laser multiphoton dissociation–resonance-enhanced multiphoton ionization (MPD–REMPI) and time-of-flight photoelectron spectra (TOF-PES) of Fe(C5H5)2, Co(C5H5)2, and Ni(C5H5)2 have been obtained in the range 380–390 nm, and the MPD–REMPI of Fe(C5H5)2 and Co(C5H5)2 have been obtained in the range 445–455 nm. The only ions produced by the pulsed dye laser are Fe+, Co+, and Ni+. Transitions observed in the MPD–REMPI spectra are assigned to resonant states of the neutral atoms. Final states of the atomic ions are determined from the TOF-PES spectra. For Ni and Co, there appears to be a propensity for core preservation of the resonant state upon ionization if the resonant state has an electron configuration with an electron in a d-type Rydberg orbital. For Fe, no such propensity is observed.