Direct measurement of the binding energy of the linear He⋯I35,37Cl(X) isotopomers

✍ Scribed by Joshua P Darr; Andrew C Crowther; Richard A Loomis

• Book ID: 104108555
• Publisher: Elsevier Science
• Year: 2003
• Tongue: English
• Weight: 259 KB
• Volume: 378
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/s0009-2614(03)01343-5

✦ Synopsis

Two color, pump-probe action spectra were recorded by tuning an excitation laser through the ICl B-X, 2-0 spectral region and monitoring the fluorescence induced by a probe laser, which was fixed on either the I 35 Cl or the I 37 Cl E-B, 13-2 bandhead. A continuum signal is observed above a discrete energy in each of the action spectra that is attributed to bound-free transitions of the HeÁ Á ÁI 35;37 Cl complexes with preferred linear equilibrium geometries. The shifts of the onsets of the continuum signals from the transition energies of the respective I 35 Cl and I 37 Cl B-X, 2-0 band origins correspond to ground state binding energies of 22.3(1.2) and 22.5(1.1) cm À1 for the linear HeÁ Á ÁI 35 Cl(X,v 00 ¼ 0) and HeÁ Á ÁI 37 Cl(X,v 00 ¼ 0) isotopomers.