Electronic states of Bi₂

Laser Excitation Spectra and Franck–Condon Factors for Bi2X1Σ+g→A(0+u)

“…The ground state constants resulting from the present analysis also compare favorably with those predicted from the spectroscopic constants reported in Ref. (8), as shown in Table 1.…”

“…The X-A spectrum has been studied previously using grating absorption (2-3), laser excitation (4), laser-induced fluorescence (5)(6)(7)(8), polarization labeling (9), matrix (10), photoluminescence (11)(12), and emission (13) techniques. The most comprehensive rotational analyses of the X 1 ⌺ g ϩ -A(0 u ϩ ) system are based on the laser excitation spectra of Gerber et al (4), which was limited to rotational levels, J Ͻ 60, and the recent laser-induced fluorescence and thermal emission studies of Barrow et al (8), which were limited to 9 Յ vЈ Յ 26.…”

Atomization energies and enthalpies of formation of the SnBin (n=1–3) gaseous molecules by Knudsen cell mass spectrometry

“…is from Ehret and Gerber, 18 and the zero-point energy ͑ZPE͒ of 1.03 kJ mol Ϫ1 was taken from Barrow et al 19 The GEF 0 values of Bi 2 (g) have been computed according to statistical thermodynamic procedures, using the rigid-rotator harmonic-oscillator approximation 20 and the experimental molecular parameters; the vibrational frequency, e ϭ173.0 cm Ϫ1 , 19 the bond distance, r e ϭ2.6597 Å, 19 of the Bi 2 (g) 1 ⌺ g ϩ ground state, and the transition energies of the first three low-lying excited states, 3 ⌺ u ϩ (1 u ) at 5480 cm Ϫ1 , 3 ⌺ u ϩ (0 u ) at 8245 cm Ϫ1 , and 3 ⌬ u (2 u ) at 9900 cm Ϫ1 from Polak et al 21 Table II lists the thermal functions of Bi 2 (g). For the calculation of k Bi , the ionization cross section of Bi 2 (g) was assumed to be 1.5 times that of Bi(g), 22 and the multiplier gains were measured as 10 5 times 2.67 and 2.30 for Bi ϩ and Bi 2 ϩ , respectively.…”

6 Infrared emission spectroscopy

“…298 Similar experiments were carried out for Te 2 , 299 CsH 300 and Bi 2 . 301 A classic experiment was carried out by Vervloet 302 who made NH 2 in an RF discharge and excited various levels with a dye laser. The bending levels of NH 2 could be assigned up to u 2 10 and clearly showed the re-ordering of the K levels at the barrier to linearity.…”