Post on 04-Jan-2016
description
CF3Br
agust,heima,....CF3Br/Sept10/PXP-291110ks/Br 1D-REMPImW-291110ks-011210ak.pxpagust,heima,....CF3Br/Sept10/PXP-291110ks/Br 1D-REMPImW-291110ks-021210ak.pxpagust,www,....cf3br/PPT-011210ak.pptagust,www,....cf3br/PPT-021210ak.pptagust,heima,....CF3Br/Sept10/PXP-291110ks/Leiðrétt-291110ks-011210ak.pxpagust,heima,....CF3Br/Sept10/PXP-291110ks/Leiðrétt-291110ks-021210ak.pxp
1hv spectrum corrected/shifted
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8684828078767472x10
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agust,heima,....CF3Br/Sept10/PXP-291110ks/Br 1D-REMPImW-291110ks-011210ak.pxp
Br atomic lines(2+1)REMPIFrom “short scans”For spectra corrected for powerAs Icorr = Imeasured / P5
NB: “mW-power correction”
Digitized 1hv spectrum fromS. Eden et al., CP, 322, 313 (2006)
Irel
2hv
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84828078767472x10
3
agust,heima,....CF3Br/Sept10/PXP-291110ks/Br 1D-REMPImW-291110ks-021210ak.pxp
Br atomic lines(2+1)REMPIFrom “short scans”For spectra corrected for powerAs Icorr = Imeasured / P5
NB: “mW-power correction”
Digitized 1hv spectrum fromS. Eden et al., CP, 322, 313 (2006)
Irel
2hv
1hv spectrum corrected/shifted
NB: We assume that the relative intensities of the Br atomic lines for the “short scans” and low step size (0.1 cm-1) are more reliable than those orthe “long scans” and larger step size (0.2 cm-1)
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8684828078767472x10
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Br atomic lines“short scans”“mW-power corrected”0.1 cm-1 step size
Br atomic lines“mJ-power corrected”0.2 cm-1 step size
Digitized 1hv spectrum fromS. Eden et al., CP, 322, 313 (2006)Irel
2hv
agust,heima,....CF3Br/Sept10/PXP-291110ks/Br 1D-REMPImW-291110ks-011210ak.pxp
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1500
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0
84828078767472x10
3
Br atomic lines“short scans”“mW-power corrected”0.1 cm-1 step size
Br atomic lines“mJ-power corrected”0.2 cm-1 step size
Digitized 1hv spectrum fromS. Eden et al., CP, 322, 313 (2006)Irel
2hv
agust,heima,....CF3Br/Sept10/PXP-291110ks/Br 1D-REMPImW-291110ks-021210ak.pxp
1hv spectrum corrected/shifted
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0
8079787776x10
3
Br atomic lines“mW-power corrected”0.1 cm-1 step size
Br atomic lines“mJ-power corrected”0.2 cm-1 step size
It is not clear from the spectra comparison belowhow to correct relative intensities of Br atomic lines recorded by “long scans”Band step size 0.2 cm-1, since there does not seem to be any systematicrelationship in relative intensities when compared with the “short scan” spectra
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2hv
agust,heima,....CF3Br/Sept10/PXP-291110ks/Br 1D-REMPImW-291110ks-011210ak.pxp
• The conclusion is that Br atomic lines in the high wavenumber range (> 80000cm-1) need to be rescanned by short scans and small step sizes(0.1 cm-1) in order to obtain more relyable picture of the relative intensities of The bands in that region.
• Based on the data presented in slide 2, abowe, for Br atomic lines recorded in the range 71000 – 80000 cm-1 (“short scans”, small step sizes) the largest signalsare observed for the region of excitation to the [CF3Br+,2E]c ;5p Rydberg state whereas atomic lines corresponding to excitations to the region to the [CF3Br+,2E]c ; 5s Rydberg state are very weak. This suggests that the major channelFor formation of Br is via excitation to the [CF3Br+,2E]c ;5p Rydberg state.This fits nicely with the results of the CF3
+ formation analaysis:See: http://www3.hi.is/~agust/rannsoknir/rempi/cf3br/PPT-201110ak.pptand below
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Rel
ativ
e In
tens
ity
86x103
84828078767472Energy (cm-1)
C-503 C-540A C-480 I1
agust,heima,....CF3Br/Sept10/PXP-291110ks/Leiðrétt-291110ks-011210ak.pxp
Digitized 1hv spectrum fromS. Eden et al., CP, 322, 313 (2006)
Irel
2hv
CF3+
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0
Rel
ativ
e In
tens
ity
84x103
828078767472Energy (cm-1)
C-503 C-540A C-480 I1
agust,heima,....CF3Br/Sept10/PXP-291110ks/Leiðrétt-291110ks-021210ak.pxp
Digitized 1hv spectrum fromS. Eden et al., CP, 322, 313 (2006)
Irel
2hv
CF3+
1hv spectrum corrected/shifted