Hyperfine coupling of the iodine ${\boldsymbol{D}}{0}_{{\boldsymbol{u}}}^{+}$ andβ1_gion-pair states

Abstract

Detailed studies of I 2 (β1 g , v β =13, J β ∼D0 , u + v D =12, J D and D, 48, J D ∼β, 47, J β ) rovibronic state coupling have been carried out using two-step two-color, hν 1 +hν 2 and hν 1 +2hν 2 , opticaloptical double resonance excitation schemes, respectively. The hyperfine interaction satisfying the J D | |=0, 1 selection rules (magnetic-dipole interaction) has been observed. No electric-quadrupole hyperfine coupling ( J D | |=2) has been found. The dependences of ratios of luminescence intensities from the rovibronic states populated due to the hyperfine coupling to those from optically populated ones on energy gaps between these states have been experimentally determined. The matrix elements as well as the hyperfine structure constant have been obtained using these dependences. It is shown that they increase slightly with the vibrational quantum number of the states.

Observation of a gerade symmetry state of Cu2 using two‐color resonant four‐wave mixing

“…Fluorescence‐based methods, such as detection of dispersed fluorescence or stimulated emission pumping by depletion of fluorescence, have been applied for the characterization of levels accessible by two‐photon transitions. Recent examples are found in the literature on Li 2 , Na 2 , Hg 2 , and I 2 . However, to the best of our knowledge, no optical–optical double‐resonance experiments are reported for homonuclear transition metal dimers.…”

“…Recent examples are found in the literature on Li 2 , [34] Na 2 , [38] Hg 2 , [39] and I 2 . [40] However, to the best of our knowledge, no optical-optical double-resonance experiments are reported for homonuclear transition metal dimers. Here, we demonstrate the potential TC-RFWM for such studies.…”

Photoemission resulting from collisions of I2 with 5–100 eV electrons

“…Interpretation of the present spectral results should benefit from the extensive work on the spectroscopy of I 2 [26][27][28][29][30][31][32], as well as of the other relevant species [25,[33][34][35][36][37][38]. There are, nevertheless, recent experiments aimed at further elucidating the electronic structure of iodine which suggests that iodine remains a molecule of considerable interest [39][40][41][42]. Molecular iodine also continues to be an important benchmark in theory [43][44][45], including that of electron-molecule collisions [46,47].…”