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High-resolution Raman spectroscopy of the ν1 region and Raman–Raman double resonance spectroscopy of the 2ν1−ν1 band of 32SF6 and 34SF6. Determination of the equilibrium bond length of sulfur hexafluoride

“…It completes our recent studies of the SF 6 Raman-active fundamentals which were published in [11] (m 2 ) and [13] (m 5 ). This work has been realized for the two main isotopomers of SF 6 , namely 32 SF 6 (95.02% natural abundance) and 34 SF 6 (4.21% natural abundance).…”

“…The present paper is a new contribution to this topic concerning the stimulated Raman spectrum of the totally symmetric m 1 stretching band and its associated hot bands (m 1 þ m 6 À m 6 , m 1 þ 2m 6 À 2m 6 , m 1 þ m 5 À m 5 ), as well as the Raman-Raman double resonance spectrum of 2m 1 À m 1 . It completes our recent studies of the SF 6 Raman-active fundamentals which were published in [11] (m 2 ) and [13] (m 5 ).…”

“…The study of these hot bands requires the investigation of many vibrational bands, including fundamentals, combinations, and harmonics. Moreover, SF 6 being a centrosymmetric species, transitions from the ground state to many of its vibrational levels (those with g parity) are infrared inactive and can only be studied using Raman techniques. Another important problem concerning SF 6 spectroscopy is the m 6 vibrational mode which is inactive both in infrared absorption and in Raman scattering.…”

Hurricane Katrina-induced forest damage in relation to ecological factors at landscape scale

“…Shorter and smaller diameter trees are usually less severely damaged than taller and larger diameter trees (Lugo et al 1983;Francis 2000;Reilly et al 2002;Ostertag et al 2005). We achieved similar results that shrub/scrub appeared to be the most resistant cover type to hurricane disturbance.…”

“…Wind speeds usually peak above ridge crests and therefore the leeward side of hills experience increased turbulence (Finnigan and Brunet 1995). Forests growing on windward slopes are more vulnerable to windthrow than those on leeward slopes (Lugo et al 1983;Bellingham 1991;Reilly 1991;Foster and Boose 1992), and forests in lower elevation receive more damage than those in higher elevation (Reilly et al 2002). Lugo et al (1983) and Putz and Sharitz (1991) found that hurricane winds caused greater damage to forests in coastal flat lowland areas.…”