hbr ; updated : 22.11.2013 imaging experiments in crete
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HBr ; Updated : 22.11.2013 Imaging experiments in Crete Labtop ..C:……/ Crete / HBr /PPT-130911aka.pptx & https://notendur.hi.is/~agust/rannsoknir/Crete/PPT-130911aka.pptx ( updated file ). Energetics :. https://notendur.hi.is/~agust/rannsoknir/papers/jcp93-4624-90.pdf. cm -1. - PowerPoint PPT PresentationTRANSCRIPT
HBr; Updated: 22.11.2013
Imaging experiments in Crete
Labtop..C:……/Crete/HBr/PPT-130911aka.pptx
&
https://notendur.hi.is/~agust/rannsoknir/Crete/PPT-130911aka.pptx(updated file)
30 k
60 k
90 k
H + Br30300 cm-1
93736.45 cm-1
H + Br**(4P;5s)
Lowest energy Br**
HBr+ + e; 94205.51806 cm-1 (11.68 eV)
H + Br*(1/2)33985.24 cm-1
H + Br +125584.8
139978.77 H + + Br
74000 cm-1 (9.17 eV)
86000cm-1 (10.66 eV)
43000cm-1( 232.56 nm <= 465.11 nm)37000cm-1 (270.27 nm <= 540.54 nm)
Total scanrange for HBr H + + Br-112849.6cm-1
130 k
(1)
(2)
(3)
(n) = number of photons
https://notendur.hi.is/agust/rannsoknir/rempi/hbr/Jan12/PPT-180112ak.ppt
Energetics: cm-1
„Internuclear distance“
https://notendur.hi.is/~agust/rannsoknir/papers/jcp93-4624-90.pdf
III. Different ion formation channels:
Main channels:HBr**(Ry,v´,J´) + hv -> HBr+ + e ; Ionization of Rydberg stateHBr**(I-P,v´,J´) + 2hv -> -> H+ + Br + e; Ionization of Ion-pair statesHBr**(I-P,v´,J´) + 2hv ->-> H + Br+ + e; Ionization of Ion-pair states
Other possible channels(?):HBr**(I-P,v´,J´) + hv -> -> H+ + Br-; Ionization of Ion-pair states ; Ion- Pair formationBr/Br* + 3hv ->->-> Br+ + e; Ionization of Br atoms; Br+ formationHBr**(I-P,v´,J´) + hv-> HBr+ + e Ionization of Ion-pair states ; Parent ion formationHBr**(Ry,v´,J´) + 2hv -> H+ + Br + e ; Ionization of Rydberg state; H+ formation:?=> Number of different states and J´ dependent ion formation channels
I. 2hv resonance excitations:HBr + 2hv ->-> HBr**(Ry,v´,J´); Rydberg state excitationHBr + 2hv ->-> HBr**(I-P,v´,J´); Ion-Pair state excitation
II. Intersystem crossings:HBr**(Ry,v´,J´) HBr**(I-P,v´,J´); Rydb. – Ion pair interactions DE(J´Ry,J´IP) dependentHBr**(Ry,v´,J´) ->-> H + Br/Br*; Predissociation
Our recent mass resolved REMPI and perturbation studies (summary):
Paper: Resonance excitation Range:
HBr States1: Comments:
http://jcp.aip.org/resource/1/jcpsa6/v138/i4/p044308_s1?isAuthorized=no or https://notendur.hi.is/~agust/rannsoknir/papers/jcp138-044308-13.pdf(JCP; 2013)
77520 – 78450 cm-1/9.61-9.73 eV
E (v´= 0) vs.V(v´=m+4) andV(m+5)
Strong Rydberg to ion-pair interaction;Emphasize J´ dependence
http://jcp.aip.org/resource/1/jcpsa6/v136/i21/p214315_s1?isAuthorized=no (JCP, 2012)
79040-80300 cm-1/9.80 – 9.96 eV
a) F1D2(v´=1) vs. V(v´=m+7)
b) E(v´=1) and H(v´=0) vs. V(v´=m+7) & V(v´=m+8)
a) (weak) resonance interactions
b) Strong interactions
Emphasize J´ dependence
http://www.sciencedirect.com/science/article/pii/S0022285212002019 ORhttps://notendur.hi.is/agust/rannsoknir/papers/HBr/jcp136-214315-12.pdf (JMSp, 2012)
74000 – 86000 cm-1/9.17 – 10.66 eV
Variour Rydberg and ion-pair states
„total range“Spectroscopic parameters and „New states“
1. V(v´): Ion-pair states; E(v´),H(v´),F(v´): Rydberg states
Others (H.P. Loock et al.) „imaging studies“ on HBr:
Paper: Resonance excitation Range:
HBr States1: Comments:
https://notendur.hi.is/~agust/rannsoknir/papers/HBr/pccp8-2940-06.pdf
(2006)
75816 – 80655 cm-19.4 – 10 eV
Many (i,F,E,H, V) Photoelectron detection. Focus on photoionization dynamics. Discover autoionization effects; Do not deal with J´dependences
https://notendur.hi.is/~agust/rannsoknir/papers/jcp127-124304-07a.pdf
(2007)
Specific wavelengths (see next column)
Q(0) and Q(1) lines for E(v´=0), H(v´=0), V(v´= m+3, m+i;i=5-8)
H+ detection; emphasize electronic state effects and v´dependences for V states; Do not deal with J´dependences
1. V: Ion-pair states; E,H,F, i: Rydberg states
Suggestions for experiments:-relevant to our studies (see above):
1) Studies relevant to strong state interactions vs. J´(http://jcp.aip.org/resource/1/jcpsa6/v138/i4/p044308_s1?isAuthorized=no /JCP; 2013)(or https://notendur.hi.is/~agust/rannsoknir/papers/jcp138-044308-13.pdf)Record ion images (H+, Br+, HBr+ (?)) vs J´ for two-photon, one-color resonance excitations to J´ levels ofa) The Rydberg state E(v´=0); For Q lines, J´=0, 2, ..8, 9(?) b) The Ion-pair state V(v´=m+5); For Q lines, J´=0, 2, ..8, 9(?) c) The Ion-pair state V(v´= m+4); For Q lines, J´=0, 2, ..8, 9(?) (excitation range: 77520 – 78450 cm-1/9.61-9.73 eV; photons: 258.00-254.94 nm;see lines: https://notendur.hi.is/~agust/rannsoknir/papers/jcp93-4624-90.pdf and/orhttps://notendur.hi.is/~agust/rannsoknir/papers/HBr/jms90-152-81.pdf)
::
2) Studies relevant to i) weak resonance state interactions and ii) strong interactions vs. J´(http://jcp.aip.org/resource/1/jcpsa6/v136/i21/p214315_s1?isAuthorized=no /JCP, 2012)(or https://notendur.hi.is/agust/rannsoknir/papers/HBr/jcp136-214315-12.pdf ) Record ion images (H+, Br+, HBr+ (?)) vs J´ for two-photon one color resonance excitations to J´ levels ofa) The Rydberg state F(v´=1); Q lines, J´=3, 4,5,6,7 (i)b) The Rydberg state E(v´=1); Q lines, J´= 0,1,….7(?) (ii)c) The Rydberg state H(v´=0), Q lines, J´= 0,1,….9(?) (ii)d) The Ion-pair state V(v´=m+7), Q lines, J´= 0,1, ..(5),..9 (i and ii)e) The Ion-pair state V(v´=m+8), Q lines, J´= 0,1,…7 (ii)(excitation range 79040-80300 cm-1/9.80 – 9.96 eV; photons: 253.04-249.07 nm;see lines: http://jcp.aip.org/resource/1/jcpsa6/v136/i21/p214315_s1?isAuthorized=no and/orhttps://notendur.hi.is/~agust/rannsoknir/papers/jcp93-4624-90.pdf and/orhttps://notendur.hi.is/~agust/rannsoknir/papers/HBr/jms90-152-81.pdf)
See spectral lines below:
http://jcp.aip.org/resource/1/jcpsa6/v136/i21/p214315_s1?isAuthorized=no
O Q(J´=J´´) S
https://notendur.hi.is/~agust/rannsoknir/papers/jcp93-4624-90.pdf
J´ Q0 78389,51 78380,412 78362,353 78335,614 78300,595 78257,836 782087 78151,928 78090,539 78024,92
Predicted lines fromB´,D´, n0, B´´,D´´See:„C:…Vm4Qlines-130916ak.xlsx
https://notendur.hi.is/~agust/rannsoknir/papers/jcp93-4624-90.pdf
O Q (J´=J´´) S O Q (J´=J´´) S
Q:J´= J´´
https://notendur.hi.is/~agust/rannsoknir/papers/jcp93-4624-90.pdf
O P Q(J´=J´´) R S
Q:J´= J´´
https://notendur.hi.is/~agust/rannsoknir/papers/HBr/jms90-152-81.pdf1hv absorption => Q lines not observed
J´ Q0 778301 778212 778033 77778,74 77743,575 77700,096 77648,187 77587,928 775209 77444,9710 77363,6611 77276,912 78481,62
See:„C:…Vm4Qlines-130916ak.xlsx
Q:J´= J´´
From ourREMPI spectra
https://notendur.hi.is/~agust/rannsoknir/papers/HBr/jms90-152-81.pdf1hv absorption => Q lines not observed
https://notendur.hi.is/~agust/rannsoknir/papers/HBr/jms90-152-81.pdf1hv absorption => Q lines not observed
http://jcp.aip.org/resource/1/jcpsa6/v138/i4/p044308_s1?isAuthorized=no
REMPI Spectra:
http://jcp.aip.org/resource/1/jcpsa6/v136/i21/p214315_s1?isAuthorized=no
https://notendur.hi.is/~agust/rannsoknir/papers/jcp93-4624-90.pdf
More V(m + i) lines:See Table IV in https://notendur.hi.is/~agust/rannsoknir/papers/jcp93-4624-90.pdf (C&G; 1990)and Table 3 in https://notendur.hi.is/~agust/rannsoknir/papers/HBr/jms282-20-12.pdf (Long et al. (2012)and Table III in https://notendur.hi.is/~agust/rannsoknir/papers/HBr/jms90-152-81.pdf (G,G&T; 1982)
C&G(90) GGT(82) Long et al.(12)P&R: V(m-1)V(m)V(m+1)
V(m+2) V(m+2)V(m+3) V(m+3)
V(m+4)V(m+5) V(m+5)V(m+6) V(m+6)V(m+7) V(m+7)V(m+8) V(m+8)-------V(m+10)
V(m+11) V(m+12) V(m+12)
V(m+13) V(m+13)----------V(m+16)V(m+17) V(m+17)
V(m+18)V(m+19)
https://notendur.hi.is/~agust/rannsoknir/papers/HBr/jms282-20-12.pdf
Alternative HBr experiments(3 & 4):
3) „near-resonance“ interaction: k3P1(v´= 0) (k(0)) and V(m+9) for J´= 7Ref: https://notendur.hi.is/~agust/rannsoknir/papers/HBr/jms282-20-12.pdf :
4) „near-resonance“ interaction: 6pp3S-(v´= 0) and V(m+17) for J´= 7,8,9Ref: https://notendur.hi.is/~agust/rannsoknir/papers/HBr/jms282-20-12.pdf :
O Q S