hbr, v(m+8), one-color, vmi one-color: ker spectra vmi, v(m+8) vs...
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HBr,V(m+8), one-color, VMI
One-color:KER spectra VMI, V(m+8) vs J´(=J´´)…………………………………2Branching ratios……………………………………………………………..3-4Angular distributions………………………………………………………5-7Two color; Br detection…………………………………………………………………...8-20Br* detection………………………………………………………………….21-24H det……………………………………………………………………………..25-28
Updated: 09.10.2014
4
3
2
1
0
3.02.52.01.51.00.50.0
At(wave1): 0.080819 At(wave1): 0.014809 At(wave1): 0.05506
At(wave3): 0.086407 At(wave3): 0.015168 At(wave3): 0.059844
At(wave5): 0.081932 At(wave5): 0.016612 At(wave5): 0.054638
At(wave7): 0.080005 At(wave7): 0.015925 At(wave7): 0.057725
At(wave9): 0.07808 At(wave9): 0.019208 At(wave9): 0.065056
At(wave11): 0.077664 At(wave11): 0.021054 At(wave11): 0.066456
At(wave13): 0.073827 At(wave13): 0.021456 At(wave13): 0.066274
At(wave15): 0.075848At(wave15): 0.023018 At(wave15): 0.064863
I(H*+Br*) I(H*+Br) HBr+*/HBr+
Integral values
…PXP-140922,pxp; Lay:0; Gr:1; …….XLS-140916.xlsx
KER/eV
J´=J´´=
7
6
5
4
3
2
1
0
V(m+8)
5
4
3
2
1
0
76543210
…PXP-140922,pxp; Lay:1; Gr:2; …….XLS-140916.xlsx
I(H*+Br*)/I(H*+Br)
J´
=> Overall drop in ratio with J´
V(m+8)
3
2
1
0
76543210
…PXP-140922,pxp; Lay:2; Gr:3; …….XLS-140916.xlsx
=> Overall drop in ratio with J´
V(m+8)
J´
I(HBr+/HBr+*)/I(H*+Br)
3.0
2.5
2.0
1.5
1.0
0.5
150100500
3.0
2.5
2.0
1.5
1.0
0.5
150100500 q
V(m+8), H* + Br*
J´=J´´=
7
6
5
4
3
2
1
0
…PXP-140922,pxp; Lay:3; Gr:4; <= …XLS-140916.xlsx, sheet: „Angle processing“ => …PXP-140922,pxp; Lay:4; Gr:5;
V(m+8), H* + Br
J´=J´´=
7
6
5
4
3
2
1
0
q
3.0
2.5
2.0
1.5
1.0
0.5
0.0
150100500
HBr+ (top peak)
J´=J´´=
7
6
5
4
3
2
1
0
q…PXP-140922,pxp; Lay:5; Gr:6; <= …XLS-140916.xlsx, sheet: „Angle processing“
2.0
1.5
1.0
0.5
0.0
-0.5
-1.0
76543210
H*+Br
H*+Br*
top peak
J´
b2
I(HBr+;top peak)I(H*+Br*),I(H*+Br)
V(m+8), VMIOne-step analysis using b2 and b4
…PXP-140922a,pxp; Lay:0; Gr:3; <= XLS-140916.pxp: sheet: „Angle fits“
V(m+8)
Two color exp. Br detection:
Two color exp.
V(m+8)
Two-color:pump: V(m+8), J´= 0,….7Probe: hv 2hv
Br line at 260,622 nm 38369,75 cm-1 76739,49
i.e. Br** <-<-Br:(…4p5) 4D3/2 <-<-(4p45p)2P3/2
V(m+8)
J´= 0 1 2
J´= 3 4 5
1.5
1.0
0.5
0.0
30025020015010050
2 color; Br detection (260.622 nm)
pix
…PXP-140922,pxp; Lay:6; Gr:7;
V(m+8),
J´=J´´=
7
65
4
3
210
V(m+8)
Above data recorded for repeller voltage = 2 kVOne color VMI data recorded for repeller voltages = 3kV
Velocity conversion factor alteration: C(2kV) = C(3kV)*(2/3) (is that correct?)where KER(Br+) = C* (pix)2
and KER(Br+) = (1/80)* KER(total)HenceKER(total) = 80* KER(Br+)
V(m+8)
1.5
1.0
0.5
0.0
1086420KER(total)/eV
…PXP-140922,pxp; Lay:7 Gr:8;
Strange disappearance of the peak V(m+8), H* + Br*
J´=J´´=
7
65
4
3210
1.25 eV
V(m+8)
Now let´s do prediction calc.
1. Prediction calculation for one photon excitation into repulsive valence states followed by dissociation to form H + Br:
KER(total)= E(J´´) + hv – D0(HBr)
J´ hv E(J´´) KER(Br(3/2)) KER(Br(3/2))cm-1 cm-1 cm-1 eV
0 40014,5 0 9804,5 1,2156035271 40010,9 16,69516 9817,595161 1,217227122 40003,3 50,07752 9843,377524 1,2204237273 39991,2 100,1312 9881,331169 1,2251293814 39974,85 166,8322 9931,682217 1,2313721185 39954,5 250,1488 9994,648828 1,2391789866 39930,25 350,0412 10070,2912 1,2485574497 39900,9 466,4616 10157,36159 1,259352804
V(m+8)
Now let´s do prediction calc.
1. Prediction calculation for three photon excitation into superexcitedState(s) followed by dissociation to form H* + Br:
KER(total)= E(J´´) + 3hv – D0(HBr)-E(H*)
J´ 3hv E(J´´) KER(Br(3/2)) KER(Br(3/2))cm-1 cm-1 cm-1 eV
0 120043,5 0 7574,55 0,939124861 120032,7 16,69516 7580,445161 0,9398557682 120009,9 50,07752 7591,027524 0,9411678143 119973,6 100,1312 7604,781169 0,9428730494 119924,6 166,8322 7622,432217 0,9450615015 119863,5 250,1488 7644,698828 0,947822216 119790,8 350,0412 7671,841204 0,9511874377 119702,7 466,4616 7700,211586 0,954704917
V(m+8)
Now let´s do prediction calc.
1. Prediction calculation for two photon resonance excitation to ion-pair statefollowed by predissociation to form H + Br:
KER(total)= E(J´´) + 2hv – D0(HBr)
J´ 2hv E(J´´) KER(Br(3/2)) KER(Br(3/2))cm-1 cm-1 cm-1 eV
0 80029 0 49819 6,1767710851 80021,8 16,69516 49828,49516 6,1779483352 80006,6 50,07752 49846,67752 6,1802026623 79982,4 100,1312 49872,53117 6,1834081064 79949,7 166,8322 49906,53222 6,1876237015 79909 250,1488 49949,14883 6,1929074896 79860,5 350,0412 50000,5412 6,1992793347 79801,8 466,4616 50058,26159 6,206435752
V(m+8)
Comment
• This suggests that the main peak is due to Br formed byone photon excitation followed by dissociation to form H + Br
• The „inner ring fits with non of the above possibilities!
„The „inner ring“ could be an artifact
V(m+8)
Angular distribution analysis, 2 color exp. Br detection:
V(m+8)
3.0
2.5
2.0
1.5
1.0
0.5
0.0
150100500
V(m+8) 2 colour
…PXP-140922c.pxp; Lay:0, Gr:1
V(m+8), fitting by beta2 and beta4 only J´=J´´=
7
6
5
4
3
2
1
0
0q
Br detection:V(m+8)
-2
-1
0
1
2
76543210
Beta and delta Bata for V(m+8) 2 colour
J´
b2
V(m+8)
…PXP-140922c.pxp; Lay:1, Gr:2Purely perpendicular
Br detection:
2 color exp. Br* detection:
V(m+8)
2.5
2.0
1.5
1.0
0.5
0.0
20151050
V(m+8)
…PXP-140922c.pxp; Lay:2, Gr:11
J´=J´´=
3
2
1
0
KER(total) eV
2hv
1hv
Check 2hv
1.2
1.0
0.8
0.6
0.4
0.2
150100500
1.4
1.2
1.0
0.8
0.6
0.4
0.2
150100500…PXP-140922c.pxp; Lay:4, Gr:15
q
V(m+8)
2hv
No backgroundSubtractionFits for beta6 =0
J´=J´´=
3
2
1hv
…PXP-140922c.pxp; Lay:3, Gr:14q
2.0
1.5
1.0
0.5
0.0
-0.5
-1.0
-1.5
4.03.53.02.52.01.51.0
V(m+8)
b2
Two color Br*-detection (exp. 141007), (NB: for beta6=0 fit)
J´
2hv (no bgr. Subtraction)
…PXP-140922c.pxp; Lay:6, Gr:16
1hv
Angular distribution analysis, 2 color exp. H detection:
V(m+8)
1.2
1.0
0.8
0.6
0.4
0.2
0.0
3.02.52.01.51.00.50.0
V(m+8) Two color exp. H-detection(set2):
H detection, one color,243.161 nm (H->->H* resonance)
H detection, one color, 250.010 nm (J´´=3->->J´=3 resonance
Two-color, 1) 250.010 nm (HBr resonance excitation)2) 243.161 nm H resonance excitation,
…PXP-140922b.pxp; Lay:1, Gr:3
KER(total)eV
1.0
0.8
0.6
0.4
0.2
0.0
3.02.52.01.51.00.50.0
V(m+8) Two color exp., H-detection (set2):
One color, H detection, 250.010 nm (J´´=3->->J´=3 resonance
Two-color, 1) 250.010 nm (HBr resonance excitation)2) 243.161 nm H resonance excitation,
Two color – one color
KER(total)eV
…PXP-140922b.pxp; Lay:2, Gr:4
1.0
0.8
0.6
0.4
0.2
0.0
3.02.52.01.51.00.50.0
Vm+8) Two color exp., H-detection:
H detection, one color,243.161 nm (H->->H* resonance)
Two color – one color
KER(total)eV
…PXP-140922b.pxp; Lay:3, Gr:5
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