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Analysis of CF3Br Impurity Background Correction Data

This document presents a detailed analysis of CF3Br impurity background correction data. It includes measurements within the wave range of 20450-20480 cm-1, and addresses the importance of addressing impurities in spectral data. The report discusses shifts in original data points that impact peak matching and highlights significant signals for iBr and CF3, while cautioning against interpreting fluctuating N2+ signals. Graphical representations include mass signals and differences post-background correction, providing insights into the impacts of impurities on CF3Br data quality.

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Analysis of CF3Br Impurity Background Correction Data

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  1. CF3Br, 260910 Impurity background correction: agust,www,...cf3br/PPT-260910ak.ppt PC,LHj,...CF3Br/PXP-260910ak.pxpagust,heima,...

  2. I(M+) Data: 1) cf3br Data “20450-20480”, wave130 /cf3br (81903.2 cm-1 = 2hv) 2) Impurity data: “Impurity background.txt” (J.Long e-mail, 240910) ..agust,heima,..CF3Br/Sept10/Impurity backgound.txt; wave0/impc (???cm-1): original data 3) diff = cf3br-impc NB!: original data points were shifted(y-offset) -2500pnts needed to be cut from wave0/impc in order to make peaks Match. CF3+ iBr+ Mw agust, heima, ...PC,LHj,...CF3Br/PXP-260910ak.pxp; CF3Br/PXP-260910ak.pxp (IGOR file), Layout: 0, Graph: 5

  3. Main mass signals which stick out after subtraction of “impurity background” are • those for iBr+ and CF3+ • N2+ impurity signal fluctuates a lot. Therefore the negative result of the N2+ signal • after subtraction should be ignored. • The small C+ and C2+ signals sticking out after subtraction most probably is not real, • i.e. These signal most probably are due to impurti bakcground. As seen on next slide the • difference signal are tiny compared to the absolut signals strengths:

  4. Data: 1) cf3br Data “20450-20480”, wave130 /cf3br (81903.2 cm-1 = 2hv) 2) Impurity data: “Impurity background.txt” (J.Long e-mail, 240910) ..agust,heima,..CF3Br/Sept10/Impurity backgound.txt; wave0/impc (???cm-1): original data 3) diff = cf3br-impc NB!: original data points were shifted(y-offset) -2500pnts neede to be cut from wave0/impc in order to make peaks match I(M+) Mw agust, heima, ...PC,LHj,...CF3Br/PXP-260910ak.pxp; CF3Br/PXP-260910ak.pxp (IGOR file), Layout: 0, Graph: 5

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