1 / 72

HBr Mass resolved REMPI and Imaging REMPI

HBr Mass resolved REMPI and Imaging REMPI. E. H + X + + e. J + v +. HX + + e. H + X**. IE(HX). J´ v´. (2+1)REMPI: 2h n + HX ->-> HX**(v´,J´) 1h n + HX** -> HX + (v + ,J + ). HX**. Rydb. H + Br / Br *. J´´ v´´= 0. HX. r(HX). E. H + X + + e. J + v +.

maris-bauer
Download Presentation

HBr Mass resolved REMPI and Imaging REMPI

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. HBr Massresolved REMPI and Imaging REMPI

  2. E H + X+ + e J+ v+ HX+ + e H + X** IE(HX) J´ v´ (2+1)REMPI: 2hn + HX ->-> HX**(v´,J´) 1hn + HX** -> HX+(v+,J+) HX** Rydb. H + Br/Br* J´´ v´´= 0 HX r(HX)

  3. E H + X+ + e J+ v+ HX+ + e H + X** (2+2)REMPI: 2hn + HX ->-> H+X-(v´,J´) 2hn + H+X--> H + X+ J´ v´ v´,J´ HX** Rydb. H+X-/Ion-pair/V H + Br/Br* J´´ v´´= 0 HX r(HX)

  4. HCl, F1D2 Q Intensity J´=J´´ = 9 8 7 6 5 4 3 2 H35Cl+ 35Cl+ 2hn / cm-1

  5. e- Energy HX REMPI: HX+X+ IE limit e- J´ J´ + H X ** v´ v´ H+--X- HX r(H-X)

  6. E State Interactions ?

  7. E State Interactions ? FractionRydb. (1) / y0 (2) / y0 Fractionion-pair 1 2 2 2 y c1y0 c2y0 c1 c2 + + = 1 = a 1 2 y c1´y0 c2´y0 - = b 1 2

  8. E W12: Interaction strength (1) / y0 (2) / y0 FractionRydb. Fractionion-pair 1 2 2 2 y c1y0 c2y0 c1 c2 + + = 1 = a 1 2 y c1´y0 c2´y0 - = b 1 2

  9. E E( ) DE E(J´) (1) / y0 (2) / y0 FractionRydb. Fractionion-pair 1 2 2 2 y c1y0 c2y0 c1 c2 + + = 1 = a 1 2 y c1´y0 c2´y0 - = b 1 2

  10. I.e. Mixing (c12 and c22) J´ dependent: HCl: V1S F1D2 x

  11. E HX+X+ E( ) E(J´) (1) / y0 (2) / y0 FractionRydb. Fractionion-pair 1 2 2 2 y c1y0 c2y0 c1 c2 + + = 1 = a 1 2 y c1´y0 c2´y0 - = b 1 2

  12. F, v´=1 X, v´=0 H35Cl H37Cl I(Cl+)/I(HCl+) J´

  13. HCl, F1D2 Q Com- press- ion E x p a n s i o n Intensity J´=J´´ = 9 8 7 6 5 4 3 2 H35Cl+ 35Cl+ 2hn / cm-1

  14. DE

  15. Above: Weak „near-resonance“ stateinteraction (W12 small) Below: Strong „off-resonanceinteraction“

  16. H79Br

  17. E H + X+ + e J+ v+ HX+ + e H + X** J´ v´= 0 v´=m+5 v´=m+4 E HX** H+X- /Ion-pair/V H + Br/Br* J´´ v´´= 0 HX r(HX)

  18. E H + X+ + e J+ v+ HX+ + e H + X** J´ v´= 0 v´=m+5 v´=m+4 E HX** H+X- /Ion-pair/V H + Br/Br* J´´ v´´= 0 HX r(HX)

  19. H79Br V 1S(0+) W´=0 W´=0 J´=9 J´=6 v´=m+5 Off resonance J´=0 J´=6 J´=9 v´=m+4 E/cm-1 J´=6 J´=0 E 1S(0+), v´=0 J´=0

  20. E(0) Exp: Calc:

  21. H79Br V 1S(0+) J´=9 J´=6 v´=m+5 J´=0 J´=6 J´=9 v´=m+4 E/cm-1 J´=6 J´=0 E 1S(0+), v´=0 J´=0

  22. Imaging experiments in Crete:

  23. Suggestions for experiments: • -relevanttoourstudies (seeabove): • Studiesrelevanttostrongstateinteractionsvs. 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) • Recordionimages (H+, Br+, HBr+ (?)) vs J´ for two-photon, one-colorresonanceexcitationsto J´ levels of • TheRydbergstate E(v´=0); For Q lines, J´=0, 2, ..8, 9(?) • TheIon-pairstate V(v´=m+5); For Q lines, J´=0, 2, ..8, 9(?) • TheIon-pairstate V(v´= m+4); For Q lines, J´=0, 2, ..8, 9(?) • (excitationrange: 77520 – 78450 cm-1/9.61-9.73eV; 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) • : • :

  24. 2) Studiesrelevantto i) weakresonancestateinteractions and ii) stronginteractionsvs. 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 ) Recordionimages (H+, Br+, HBr+ (?)) vs J´ for two-photononecolorresonanceexcitationsto J´ levels of a) TheRydbergstate F(v´=1); Q lines, J´=3, 4,5,6,7 (i)b) TheRydbergstate E(v´=1); Q lines, J´= 0,1,….7(?) (ii)c) TheRydbergstate H(v´=0), Q lines, J´= 0,1,….9(?) (ii) d) TheIon-pairstate V(v´=m+7), Q lines, J´= 0,1, ..(5),..9 (i and ii)e) TheIon-pairstate V(v´=m+8), Q lines, J´= 0,1,…7 (ii)(excitationrange 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/or https://notendur.hi.is/~agust/rannsoknir/papers/jcp93-4624-90.pdf and/orhttps://notendur.hi.is/~agust/rannsoknir/papers/HBr/jms90-152-81.pdf)

  25. H+ Br+ and Br+fromBr resonances Br- (<= H+ + Br-)

  26. Howarethe H+ ´s formed?

  27. H+ + Br(3/2) [22P]1S0,3P0 [ B2S].. H* + Br*(1/2) H* + Br (3/2) H+ + Br- H + Br**(5s) [ 4P,5s ]3P0 V/Ion-pair Ry

  28. H+ + Br (3/2)/Br*(1/2) [22P].. [ B2S].. HBr+(v+)(3/2,1/2) H* + Br*(1/2) H* + Br (3/2) H+ + Br- H + Br**(5s) [ 4P,5s ]3P0 V/Ion-pair Ry

  29. H+ + Br*(1/2) [22P]1S0,3P0 [ B2S].. H* + Br*(1/2) H* + Br (3/2) H+ + Br- H + Br**(5s) [ 4P,5s ]3P0 V/Ion-pair Ry

  30. HBr+(A2S+) HBr*** [A2S+].. HBr+(X2P) H+ + Br- V/Ion-pair Ry

  31. In summary (?): H+ + Br- ….viaHBr***/H+Br- (2+1) hn ….viaHBr+(v+) (2+2) hn ….via H* + Br/Br* (2+2) hn H+ + Br (3/2)/Br*(1/2) H+ + Br(3/2,1/2) H+ + Br*(1/2, 3/2) V/Ion-pair Ry

  32. Imaging experiments / data E(0):

  33. HBr, E(v´=0), J´= 1 J´= 1,2,…….

  34. J´= 10(?) 9 8 7 6 5 4 3 2 1 KER/eV

  35. Signalpredictions

  36. ….via H* + Br/Br* (2+2) hn H+ + Br(3/2,1/2) H+ + Br*(1/2, 3/2)

  37. H+ + Br*(1/2) E H+ + Br (3/2) H + Br+ + e KER(3/2) KER(1/2) HBr+ + e H* + Br*(1/2) H* + Br (3/2) SO(Br*) H + Br** 3hn HBr** E(H*) H+Br- H + Br D0(HBr) HBr E(J´´) E(J´´)+3hn = D0(HBr) +E(H*)+KER(3/2) => KER(3/2)=3hn + E(J´´)–D0(HBr)-E(H*) E(J´´)+3hn= D0(HBr) +E(H*)+KER(3/2) + SO(Br*) => KER(1/2)=3hn+ E(J´´)–D0(HBr)-E(H*)-SO(Br*)

  38. ….via H* + Br/Br* (2+2) hn H+ + Br(3/2,1/2) H+ + Br*(1/2, 3/2) KER(3/2)=3hn + E(J´´)–D0(HBr)-E(H*) KER(1/2)=3hn+ E(J´´)–D0(HBr)-E(H*)-SO(Br*) E(J´´) = B´´(J´´(J´´+ 1)) – D´´J´´2(J´´+ 1)2 H+ + Br- ….viaHBr***/H+Br- (2+1) hn KER= 3hn + E(J´´) – D0(HBr) - IE(H) + EA(Br)

  39. HBr, E(0): J´= 10 9 8 7 6 5 4 3 2 1 H+ + Br(3/2) Predicted KER´s For H+ + Br- H+ + Br(1/2) KER/eV KER/eV

  40. ….via H* + Br/Br* (2+2) hn H+ + Br(3/2,1/2) H+ + Br*(1/2, 3/2) KER(3/2)=3hn + E(J´´)–D0(HBr)-E(H*) KER(1/2)=3hn+ E(J´´)–D0(HBr)-E(H*)-SO(Br*) E(J´´) = B´´(J´´(J´´+ 1)) – D´´J´´2(J´´+ 1)2 H+ + Br- ….viaHBr***/H+Br- (2+1) hn KER= 3hn + E(J´´) – D0(HBr) - IE(H) + EA(Br) ….viaHBr+(3/2,v+)/HBr+(1/2,v+) (2+2) hn H+ + Br (3/2)/Br*(1/2) KER(3/2<- 3/2)= hn+ IE(HBr+ (3/2)) + G0(HBr+ (3/2),v+) –D0(HBr) - IE(H)KER(1/2<- 3/2)= hn + IE(HBr+ (3/2)) + G0(HBr+ (3/2),v+) –D0(HBr) - IE(H)-SO(Br*) KER(3/2<- 1/2)= hn + IE(HBr+ (1/2)) + G0(HBr+ (1/2),v+) –D0(HBr) - IE(H)KER(1/2<- 1/2)= hn + IE(HBr+ (1/2)) + G0(HBr+ (1/2),v+) –D0(HBr) - IE(H)-SO(Br*) G0 (HBr+) = we(v++1/2) – wexe(v++1/2)2+weye(v++1/2)3 -(we(1/2) – wexe(1/2)2+weye(1/2)3)

  41. HBr, E(0): H+ + Br(3/2) H+ + Br(1/2) H+ + Br (3/2)/Br*(1/2) <- HBr+(3/2,v+)/HBr+*(1/2,v+) KER/eV Negligibleshift of peaks

  42. HBr, E(0), J´=1: H+ + Br(3/2) H+ + Br (3/2)/Br*(1/2) <- HBr+(3/2,v+)/HBr+*(1/2,v+) H+ + Br(1/2) Br/Br* HBr+/HBr+* ½ <- ½ 3/2 <- ½ ½ <- 3/2 3/2 <- 3/2 v+= 9 10 11 12 13 14 v+= 6 7 8 9 10 11 v+= 9 10 11 12 13 14 v+= 8 9 10 11 12 13 KER/eV Agust,labtop,C:/…/E0-KER-131124a.pxp

  43. H+ + Br- ….viaHBr***/H+Br- (2+1) hn ….viaHBr+(v+) (2+2) hn ….via H* + Br/Br* (2+2) hn H+ + Br (3/2)/Br*(1/2) H+ + Br(3/2,1/2) H+ + Br*(1/2, 3/2) V/Ion-pair Ry Signal of ChannelviaIon-pairSignal of ChannelviaRydberg vs. J´ measure of Rydberg-Ion-pairinteractionsvs. J´

  44. HBr, E(0): H+ + Br(3/2) H+ + Br (3/2)/Br*(1/2) <- HBr+(3/2,v+)/HBr+*(1/2,v+) H+ + Br(1/2) Br/Br* HBr+/HBr+* ½ <- ½ 3/2 <- ½ ½ <- 3/2 3/2 <- 3/2 v+= 9 10 11 12 13 14 v+= 6 7 8 9 10 11 v+= 9 10 11 12 13 14 v+= 8 9 10 11 12 13 KER/eV Agust,labtop,C:/…/E0-KER-131124b.pxp (Gr1, Lay0)

  45. H+ + Br*(1/2, 3/2)<-H* + Br/Br* H+ + Br(3/2,1/2)<- H* + Br/Br* J´ Agust,labtop,C:/…/E0-KER-131124c.pxp (Gr1, Lay0)

More Related