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We measured the saturated absorption spectra of Kr I at 811.51 nm by using a titanium sapphire ring laser. Saturated absorption spectroscopy (SAS) is a simple and high-resolution spectroscopic technique. The hyperfine structure and isotope shift of the resonance lines were investigated by analyzing the 5s[3/2]2 → 5p[5/2]3 transition observed in the saturated absorption spectra of Kr I. The King plot method was used to analyze the isotope shift composed of normal shift, specific shift, and volume shift. Based on this analysis, the unperturbed position of 83Kr relative to that of 84Kr was estimated to be 16.4 MHz. Furthermore, the magnetic dipole hyperfine constant A and electric quadrupole hyperfine constant B in the 5p[5/2]3 state were calculated to be A = −103.79(6) and B = −439.8(17) MHz, and those in the 5s[3/2]2 state were A = −243.88(8) and B = −454.4(13) MHz, respectively. [ABSTRACT FROM AUTHOR]

Reflectron-type time-of-flight mass spectrometry was applied to the time-resolved component analysis of deep oscillation magnetron sputtering (DOMS), which has been developed as a technique of modulated pulsed magnetron sputtering. In the present study, the DOMS of a Ti target was performed under an Ar gas atmosphere by using a DOMS-specific control waveform consisting of 25 current and/or power pulses. The time evolution of the formation of ionized species (Ar+, Ar2+, Ti+, and Ti2+) after the application of the first discharge pulse was observed at the position corresponding to the deposition region. This study revealed that the plasma build-up process from non-metallic plasma to metallic plasma takes approximately two micropulses (around 100 μs from ignition) in DOMS discharge. In addition, we have found the possibility of studying sputtering processes, such as the rarefaction, and refilling processes of Ar as a function of pulse number through DOMS research. [ABSTRACT FROM AUTHOR]

Abstract: Doppler-limited vib-rotational absorption spectra of the A ← X electronic transition of I35/37Cl are measured in the range 11,352–13,507cm−1 using a Ti:sapphire ring laser. The P-, Q-, and R-branch lines belonging to the v ← v″=(0–7)←(0–7) transition in I35Cl and the v ← v″=(0–6)←(2–6) transition in I37Cl are assigned. Under Doppler-limited conditions, the P- and R-branch lines are split into doublets by the nuclear quadrupole coupling effect of the I atom. The unperturbed positions of these lines are correctly calculated, whereas splitting in the Q-branch lines was not observed. The mass-reduced Dunham expansion coefficients U l,m of the A and X states and the spectroscopic constants , and of the A state are determined using a global least-squares fitting procedure. [Copyright &y& Elsevier]

Abstract: Sub-Doppler ro-vibrational spectra of the system of the Cs2 molecule have been measured in the region of 12800–13200cm−1 using a polarization spectroscopic technique. A total of 18000 lines have been assigned in 85 bands. Dunham coefficients Y 00 − Y 30, , , , , and Y 03 − Y 13 of the B state have been determined within a standard deviation of σ =0.0016cm−1. The RKR potential of the B 1Π u state has been calculated from v′=0 to v′=12. [Copyright &y& Elsevier]

The vibrotational absorption spectra of the A←X electronic transition of I79/81Br were measured in the 11 330- to 13 220-cm−1 region using a Ti:sapphire ring laser. The P-, Q-, and R-branch lines of the rotational states from J=10 to 100 belonging to the v′←v″=(3∼20)′,←(1∼6)″ bands were assigned. The P- and R-branch lines, unlike the Q-branch lines, were split into the doublet by the nuclear quadrupole coupling effect of the I atom. The quadrupole coupling constants of eQq0 and eQq2 in the A state were estimated to be −0.030±0.018 and −0.062±0.018 cm−1, respectively, by using the first order perturbation theory. The unperturbed line positions for the rotational lines higher than J=20 were determined. The Dunham coefficients of the X state were determined by the least squares fitting method using the pseudo vibrotational transition wavenumbers obtained by calculating the combination differences between the electronic spectral lines assigned and the far infrared vibrotational lines reported by Nelander et al. (7). The spectroscopic constants of Tv′, Bv′, Dv′, and Hv′ of the A state were determined suitable for the vibrational states from v′=3 to 20 by using a least squares fitting procedure. [Copyright &y& Elsevier]