ELECTRONIC SPECTROSCOPY of

CARBON CHAINS of

ASTROPHYSICAL RELEVANCE

      

C HC C CC C

Electronic Spectrum ? ? ?

      

PMT

Laser beam

nozzle

valve

Gas inlet

cavity

HV

2 X 2

C6H, C8H, C10H, C12H

HCCH / Ar

      

CRDS

Dischargepulse

30 μs

Time

24480 24490 cm-1

      

      Ab

sorb

an

ce

0.1

0.0

1.0

0.0

0.5

0.0

0.5

0.0450 500 550 600 nm

C6–

HC6H+

HC4CN+

C6H

Absorption Spectra in 5 K Neon Matrix

2 X 2

C6H

      

nm526.7

1/2

526.6 526.5 526.4 526.3

3/247/2

5/271/2

3/2 = 3/2

= 1/2

Gas Phase

C6H2 X 2

450 500 550

Absorption in 5 K Neon Matrix 000

      

CRDS

Dischargepulse

30 μs

Time

24480 24490 cm-1

      

DFWM

ωpump

ωprobe=

      

1

Λθ

θB

23 4

      

DFWMsignal

DFWMlaser

      

CRDS

DFWM

DFWM

24480 24490 cm-1

C4H

C3

Dischargepulse

Dischargepulse

Dischargepulse

9 μs

7 μs

30 μs

Time

< 1 μs

< 1 μs

Laser

      

1

Λθ

θB

23 4

      

TC-RFWM

UP

SEP

ωpump ωprobe

ωpump ωprobe

      

24200 24300 24400 24500

Wavenumber (cm-1)

2Σ+

2Σ+

2Π 2Σ+

2Σ+ X 2Σ+

PUMP

C4H

      

      

C2H2/He

C2D2/He

543 544 545 547546 543 544 545 547546

Inte

nsi

ty [

a.u

.|

Wavelength [nm]

H. Linnartz, N. Wehres, H. Van Winckel, G.A.H. Walker, D.A. Bohlender, A.G.G.M. Tielens, T. Motylewski and J.P. Maier, Astron. Astrophys, 511, L3, 2010

A DIB Coincidence @λ5450

      

200 300 400 500 600 700 nm

0.0

0.5

1.0 C C CH

H

B 1B1 X 1A 1

~~A 1A 2 X 1A 1

~~C 1A 1 X 1A 1

~~

J. A. Hodges, R. J. McMahon, K. W. Sattelmeyer, J. F. StantonAp J, 544, 838, 2000

      

16227

16200 16210 16220 16230 16240 16250 cm-1

16230 16233 16236 cm-1

Ka = 1-0

Ka = 0-1 Ka = 1-0 Ka = 2-1

A 1A2 X 1A1

~ ~

C C CH

H

      

B 1B1

A 1A2

X 1A113950 cm-1 16130 cm-1

~

~

~

C C CH

H

      

1A2

B2

B1

B1

1A1

b2 16233

b2 15982

b1 15813

≤ 13975

0

a- b- c-

1B1 a2 ~16161

Γstate Γv

A~

B~

X~

Γstate Γv

Vibronic interactions

Coriolis interactions

C C CH

H

      

C C CH

H

C C CH

H

H

Hhv

4500 5000 5500 6000

Wavelength (Å)

Ab

sorb

an

ce

202

201

203 202 401201 401

B 1B1 X 1A1

~ ~6 K Neon Matrix

A 1A2 X 1A1

~ ~

C C CD

D

C3H2+

mass-selection

      5430 5450 5470 5490 4840 4880 4920

5430 5450 5470 5490 4840 4880 4920 ÅÅ

201 202

B 1B1 X 1A1

~ ~

l – C3H

CRD

201 202

C C CD

D

C C CH

H

C C CH

H

      

4750 4800 4850 4900 4950

Wavelength (Å)

Re

lativ

e I

nte

nsi

ty

5 %

HD 190603

HD 183143

HD 46711

γ Ori

C C CH

H

      

Å6235 6250 6265 6150 6160 6170 Å

Ka = 2-1

Ka = 1-0

Ka = 0-15 K

20 K

60 K

A 1A2 X 1A1

~ ~Δλ = 0.15 Å

Δλ = 0.4 ÅC C CH

H

      

6240 6250 6260

Wavelength (Å)

Re

lativ

e I

nte

nsi

ty

1 %

HD 206267

ζ Oph (x2.5)

HD 179406

HD 204827 (÷2)

A 1A2 X 1A1

~ ~

10 K, Δλ = 0.15 ÅC C C

H

H

      

C C CH

H

B 1B1 X 1A1

~ ~f ~ 0.016 (theory)

N (cm-2) = 1.13 1020

N (l–C3H2) ~ 5 1014 cm-2

EW (Å)

Λ (Å)2 f

towards HD 183143

Franck-Condon factor 20 ~ 0.2 total 1

f (20) ~ 0.0031

      

      

Magnetic Bender Quadrupole 22-Pole Trap (6 K) HV ElectrodeQuadrupole

Ion source Hexapole Helium Inlet LaserPhotomultiplierLenses

      

D 2Πu

B 2Σu+

A 2Σg+

C 2Πu

X 2Πg

33 409

17 363

11 253

9 342

E / cm-1

~ 33 000 C2+ + N2

NCCN+

      

D 2Πu

B 2Σu+

A 2Σg+

C 2Πu

X 2Πg

33 409

17 363

11 253

9 342

E / cm-1

~ 33 000 C2+ + N2

UV

NCCN+

      

750 800 850 900 nm

NCCN+

000

502

402

201 50 / 40

2 4

202

101

*

*

*

B 2 Σu+ X 2 Πg

201

      

887.5 888.0 888.5 889.0 nm

NCCN+

B 2Σu+ – X 2Π3/2,g

000

      

NCCN+

~ 890 nm

355 nm

NC+ + CN

ps

C 2Πu

B 2Σu+

A 2Σg+

X 2Πg

~ 2000 cm-1

      

840 860 880 900 920 nm

HCCCCCCCCCCCCH+

000

A 2u X 2 g

1200

16141210864

1000

800

600

400n

nm

      

B 2Πg

A 2Πg

C 2Πg

X 2Πu

3

2

1

0

E/eV HC10H+

C7H2+ + C3

C7H+ + C3H

      

B 2Πg

A 2Πg

C 2Πg

X 2Πu

3

2

1

0

E/eV HC10H+

C7H2+ + C3

C7H+ + C3H

      17656 17660 17664 17668 15460 15464 15468 ν/cm -1

17610 18640 18660 ν/cm -117640 17670 17700 17730 18620

HC8H+ B 2Πu X 2Πg 000 HC10H+ B 2Πg X 2Πu 00

0

HC10H+ C 2Πg X 2Πu 000 HC12H+ D 2Πu X 2Πg 00

0

~

~

      

480 485 490 495 500 505 nm

50

100

150

200

250

300

350

400

C4H

+ c

oun

ts00

0

HC4H+

A 2Πu X 2Πg

~ ~

35

30

25

20

15

10

5

0507.1 506.7 506.9506.7 506.9 nm

Simulation~ 20 K; 0.4 cm-1

      

5066 5068 5070 5072 Å

5068.8 Å DIB

10 K

60 K

000HC4H+ A 2Πu X 2Πg

~ ~

J. Krelowski et al., Ap. J., 714, L64, 2010

      

A 2Π3/2 v3 = 1

A 2Π1/2 v = 0

A 2Π3/2 v = 0

X 2Π1/2 v = 0

X 2Π3/2 v = 0

~ 800 cm-1

31.1 cm-1

33.3 cm-1 Magnetic dipole rate ~10-6 s-1

R1m

ax

~5

06

7.9

Å

H C C C C H+

      

A 2Πu X 2Πg

~~H C C C C H

+

5055 5060 5070 5075

Wavelength (Å)

30 K

60 K

60 K

30 K

5065 5080

2Π3/2 and 2Π1/2

2Π3/2

Trot = Ts-o

DIB‘s

2Π3/2

2Π1/2

~ 33 cm-1 Magnetic dipole

000

      

M.D. Morse & J.P. Maier, Ap J, 731, 1, 2011

      

Dr. Rainer DIETSCHE

PD Dr. Jan FULARA

Dr. Fabio MAZZOTTI

Dr. Corey RICE

Satrajit CHAKRABARTY

Iryna GARKUSHA

Adam NAGY

Ranjini RAGHUNANDAN

      

      

M.D. Morse & J.P. Maier, Ap J, 731, 1, 2011

      

M.D. Morse & J.P. Maier, Ap J, 731, 1, 2011