کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5416099 1393795 2006 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The absorption spectrum of phosphine (PH3) between 2.8 and 3.7 μm: Line positions, intensities, and assignments
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
The absorption spectrum of phosphine (PH3) between 2.8 and 3.7 μm: Line positions, intensities, and assignments
چکیده انگلیسی
Over 8000 line positions and intensities of phosphine (PH3) at 3 μm have been measured at 0.0115 cm−1 resolution with the McMath-Pierce Fourier Transform spectrometer at Kitt Peak. The observed line intensities ranged from 4.13 × 10−6 to 4.69 × 10−2 cm−2 atm−1 at 296 K, for line positions between 2724.477 and 3601.652 cm−1. This region spans eight interacting vibrational states: 3ν2 (2940.8 cm−1), 2ν2 + ν4 (3085.6 cm−1), ν2 + 2ν4 (3214.9 cm−1), ν1 + ν2 (3307.6 cm−1), ν2 + ν3 (3310.5 cm−1), 3ν4 (∼3345 cm−1), ν1 + ν4 (3426.9 cm−1), and ν3 + ν4 (3432.9 cm−1). Assignments have been determined for all the bands except 3ν4 (a weak band in a highly congested area) for a total of 4232 transitions. The total integrated intensity for this region is 5.70 cm−2 atm−1 near 296 K, and assigned lines account for 79% of the observed absorption. The two strongest bands in the region are ν1 + ν4 and ν3 + ν4 with band strengths at 296 K of 1.61 and 2.01 cm−2 atm−1, respectively. An empirical database of PH3 line parameters (positions, intensities, and assignments) is now available. Lower state energies (corresponding to assignments from this study) and line widths from the literature are included; default values are used for unassigned features.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Spectroscopy - Volume 238, Issue 2, August 2006, Pages 178-192
نویسندگان
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