Plan for HBr VMI experiments in FORTH, autumn 2014 & progress -one and two-color experiments States to study……………………………………………….2-3 Rotational lines……………………………………………….4-5 Spectra …………………………………………………………..6-7 State interactions……………………………………………8-9 - lineshifts……………………………………….10 - line intensity alterations……………… linewidth alterations……………………13 One color scheme………………………………………….14 Two color scheme………………………………………….15 Atom(H,H*,Br,Br*) detection by 2nd color……..16 – 18 Progress: exp. vs. Dates …………………………………19-21 „Centers“ used……………………………………………… Bx..,xb,,xx.. Files (definitions)…………………………22 Updated
I.Weak „near resonance“ interactions of the Rydberg states with ion-pair(V) states: a)F 1 2 (v´=1) with V(m + 7) AND b)k 3 1 (v´=0) with V(m + 9) See:
II. Medium to strong „off-resonance“ interactions of the Rydberg states : a)H 1 + (v´=0) b)E 1 + (v´=1) -with V(m+7), V(m+8), V(m+9) See:
Rotational lines.
Rotational lines.
Spectra:
Spectra:
State interactions:
State interactions show as i)Line-shifts, ii)Line-intensity alterations iii)line-width alterations:
i)Line-shifts:
ii) Line-intensity alterations:
ii) Line-intensity alterations:
iii) Line-width alterations:
One color experiments: Main emphasize on H + VMI (KER´s and angular distributions vs. Rydberg and ion-pair states and J´s) 2 E HBr (HBr + ) HBr* Ry H + Br - * Ion-pair 2xh h 2xh H + & (Br) + H * & (Br*)
Two color experiments: H + and Br+ VMI (KER´s and angular distributions vs. Rydberg and ion-pair states and J´s) 2 E HBr (HBr + ) HBr* Ry H + Br - * Ion-pair 2xh 2xh h H + (Br) + H + Br H + Br* H* + Br NB: Br = Br(3/2) & (1/2) H*+Br or H+Br* H + Br** H** + Br H + and Br + 1st color 2nd color For example
ERGO: Detect H, Br, H* and Br* by 2nd color, i.e. H(n=1) + 2h -> H*(n=2) …..+h -> H + + e: 2hn = cm-1 / hn= cm-1 / = nm H*(n=2) + h -> H*(n=3) …….+h -> H + + e: hn = cm-1 / = nm Br = Br(3/2) & (1/2); Br* = Bromine Rydberg states, for example page 12 :
continue: Br* by 2nd color, e.g. 4s 2 4p 4 ( 3 P 1 )5s 4 P 1/2 1/ ,87 4s 2 4p 4 ( 3 P 2 )6p 4 D° 3/2 3/ ,86 4s 2 4p 4 ( 3 P 2 )6p 4 P° 3/2 3/ ,3 4s 2 4p 4 ( 3 P 1 )5s 4 P 1/2 1/ ,87 524, , Derived from energy levels 539, s 2 4p 4 ( 3 P 1 )6s 2 P 3/2 3/ ,33 4s 2 4p 4 ( 3 P 1 )5s 4 P 1/2 1/ ,87 4s 2 4p 4 ( 3 P 0 )4d 2 D 3/2 3/ ,59 4s 2 4p 4 ( 3 P 1 )5s 4 P 1/2 1/ ,87 546, Transitions involved:
continue: Br* by 2nd color, e.g.
dateExp. workCenter used Comments/ref. 8.9MoPrepartion work 9.9TuePrepartion work 10.9WePrepartion work 11.9ThuPrepartion work 12.9FriPrepartion work 13.9Sa 14.9Su 15.9MoH(0), 1 color, VMI TueH(0), 1 color, Slice images WeE(1),1 color, VMI ThuV(m+7), 1 color, VMI FriV(m+8), 1 color, VMI Sa 21.9su
dateExp. workCenter used Comments/ref: 22.9MoPreparation work 23.9TuePreparation work 24.9WePreparation work 25.9ThuV(m+8), 2 color, Br detection FriV(m+7), 2 color, Br detection Sa 28.9Su 29.9MoE(1)(J´=0,1,2..4) & H(0)(J´=0-2), 2 color, Br detection TueH(0), 2 color, Br* detection (J´=0-5)“1st exp.“ (?) 1.10WeH(0), 2 color, Br* detection (J´=0-9)“2nd exp.“ ThuE(1), J´= 0, 2 color, H detection 3.10FriV(m+8), J´= 3, 2 color, H detection & off-res. exp. (set 4) V(m+7), J´= 1, 2 color, H detection (?) 4.10Sa 5.10Su
dateExp. workCenter usedComments/Refs: 6.10MoH(0), 2 color, H detection, J´= 3 E(1), 2 color, Br* det., J´= 1,2,3 677, TueV(m+8), 2 color, Br* det., J´=0-3,4,5 V(m+7), 2 color, Br* det., J´=0,1 677,535„2hv rings“ seen for J´= 2,3 V(m+8) „2hv rings“ seen for J´= 0,1 V(m+7) 8.10WeV(m+7), 2 color, Br* det., J´=2,3,4,5677,5352hv ring seen in all J´s 9.10ThuV(m+7), 2 color, Br* det., J´=6,7,8677,5352hv ring seen for J´=6; not for J´=7, FriSearched for Br** without results. One- and two-color tests for 6p 3 - J´=8 677(?),535Plan to detect Br**(5s) One-color spectrum (H+) (50%HBr:50%He mixture)differs from the autumn 2013 spectrum (100% HBr) probably due to cluster formation Sa 12.10Su 13.10Mo 14.10Tue 15.10We 16.10Thu 17.10Fri 18.10Sa 19.10su
Infos: In 2 color experiments: bx…img files: MOBO blocked, Dye laser on xb..img files: MOBO on, Dye laser off resonance xx..img files: MOBO on, Dye laser on