文章基本信息

标题：Atlas of new and revised high-resolution spectroscopy of six CO isotopologues in the 101–115 nm range
其他标题：Transition energies of thev′ = 0, 1, 2, and 3 tov′′ = 0 bands of theB1Σ+,C1Σ+, andE1Π toX1Σ+states, related term values, and molecular constants
本地全文：下载
作者：J. L. Lemaire ; A. N. Heays ; M. Eidelsberg 等
期刊名称：Astronomy & Astrophysics
印刷版ISSN：0004-6361
电子版ISSN：1432-0746
出版年度：2018
卷号：614
DOI：10.1051/0004-6361/201732114
语种：English
出版社：EDP Sciences
摘要：Our knowledge of astronomical environments containing CO depends on accurate molecular data to reproduce and interpret observed spectra. The recent and future improvements of ultraviolet space instrumentation, both in sensitivity and resolution, require increasingly detailed laboratory molecular spectroscopy as a reference. As part of a long-term experimental campaign at the SOLEIL Synchrotron facility, we have acquired gas-phase absorption spectra of six CO isotopologues in the vacuum ultraviolet. These spectra are recorded using the Fourier-transform spectrometer installed on the DESIRS beamline, providing a unique resolving power up to 106in the 8–13 eV range. We have used resolutions in the 300 000–450 000 range for this campaign, which enable the analysis of individual line positions. We report new measurements on neighboring Rydberg states in the 101–115 nm range that could also be used asf-value calibrators, namelyB1Σ+,C1Σ+, andE1Π, for six CO isotopologues. This range encompasses the absorption transitionsB(v′ = 0, 1, and 2),C(v′ = 0, 1, 2, and 3), andE(v′ = 0, 1, 2, and 3) fromX1Σ+(v′′ = 0). Higher resolution laser-based measurements of CO isotopologues from the literature are used to improve the absolute calibration and accuracy of our data. The overall uncertainty of the great majority of the line positions presented in this atlas is estimated to be 0.01 cm−1. In addition, some of the data derived from transition energies measurements, such as term values and molecular constants, are obtained for the first time, and others are improvements on previous sparser or lower spectral resolution datasets.
关键词：Key wordsenmolecular datamethods: laboratory: moleculartechniques: spectroscopictechniques: interferometric