Presentation is loading. Please wait.

Presentation is loading. Please wait.

Beam Action Spectroscopy via Inelastic Scattering BASIS Technique

Published byHarry Norton Modified over 5 years ago

Similar presentations

Presentation on theme: "Beam Action Spectroscopy via Inelastic Scattering BASIS Technique"— Presentation transcript:

1 Beam Action Spectroscopy via Inelastic Scattering BASIS Technique
Bobby H. Layne and Liam M. Duffy Department of Chemistry & Biochemistry, the University of North Carolina at Greensboro, Greensboro, North Carolina 27402 Hans A Bechtel, Adam H. Steeves and Robert W. Field Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139

2 Talk Outline Photodissociation Experiments
Finding and Identifying an Anomaly Developing BASIS

3 Current Research Photodissociation of atmospheric molecules, characterizing quantum state distribution of products Crossbeam reaction dynamics Molecules studied - ozone, chlorine dioxide, hydrogen cyanide, chlorine

4 Experimental Setup InSb Hot Electron Bolometer Vacuum Chamber with
Diffusion Pump Below Teflon Window & Lens ULN6 preamp InSb Hot Electron Bolometer mm-Wave Source Module Pulsed Slit Nozzle Wire Grid Polarizer Used as Attenuator Rotation controlled by computer Mm-Wave power monitored by pulse modulating source Tunable UV from doubled OPO

5 mm-wave – Rotational Spectroscopy

6 Vacuum Chamber

7 J=4 J=3 J=1 J=5 J=0 J=2 J=0 J=6 J=6

8 Parent Molecule

9 Photodissociation of Parent Molecule

10 Current Photodissociation Study
hn Cl Cl O O O O Oxygen Chlorine Dioxide Chlorine Monoxide Parent Molecule Product Molecules

11 Probing Product Molecule
Cl O

12 UV action spectrum of O35ClO

13 UV action spectrum of O35ClO
(16,0,0) (15,0,0) (14,0,0) 1st Anomaly (17,0,0)

14 Hole is too deep! 2nd Anomaly

15 Parent Signal BASIS Signal

16 Ar Ar Ar Ar Ar Ar Ar Ar Ar Ar Ar Ar Ar Ar Ar Ar Ar Ar Ar Ar Ar
O C S O C S Ar O C S Ar Ar Ar Ar O C S O C S Ar Ar O C S Ar Ar Cl O O Ar Ar O C S Ar Ar O C S O C S O C S Ar Ar Ar O C S Ar O C S Ar Ar Ar O C S

17 BASIS Scan - OCS J = 6 J = 25

18 J = 25 J = 6

19 Rotational Distribution Shift - OCS

20 Developing BASIS

21 H-C C-H + OCS g H-C C-H + OCS
MIT’s Twist: BASIS used for Infrared Spectroscopy H-C C-H + IR g H-C C-H (vib. cold) (vib. hot) H-C C-H + OCS g H-C C-H + OCS (vib. cold) (vib. hot) (rot. hot) (rot. cold) collision Reporting Molecule

22 IR Spectroscopy of Vibrational Hot Acetylene - BASIS

23 Conclusion New spectroscopy technique for seeing “dark” molecules
May be applied to any energy transfer spectroscopy

Download ppt "Beam Action Spectroscopy via Inelastic Scattering BASIS Technique"

Similar presentations

LASER BASED SENSOR FOR DETECTION OF TRACE GASES IN THE ENVIRONMENT M. A. Gondal, I. A. Bakhtiari and Z. H. Yamani Laser Research Laboratory & Physics.

LASER BASED SENSOR FOR DETECTION OF TRACE GASES IN THE ENVIRONMENT M. A. Gondal, I. A. Bakhtiari and Z. H. Yamani Laser Research Laboratory & Physics.
64th OSU International Symposium on Molecular Spectroscopy June 22-26, 2009 José Luis Doménech Instituto de Estructura de la Materia 1 MEASUREMENT OF ROTATIONAL.

64th OSU International Symposium on Molecular Spectroscopy June 22-26, 2009 José Luis Doménech Instituto de Estructura de la Materia 1 MEASUREMENT OF ROTATIONAL.
Molecular Spectroscopy Symposium

Molecular Spectroscopy Symposium
Single Shot Combined Time Frequency Four Wave Mixing Andrey Shalit, Yuri Paskover and Yehiam Prior Department of Chemical Physics Weizmann Institute of.

Single Shot Combined Time Frequency Four Wave Mixing Andrey Shalit, Yuri Paskover and Yehiam Prior Department of Chemical Physics Weizmann Institute of.
X-ray Free-Electron Lasers: Challenges for Theory, Cambridge, Massachusetts, USA, June 19, 2006 Infrared X-ray pump-probe spectroscopy Hans Ågren Department.

X-ray Free-Electron Lasers: Challenges for Theory, Cambridge, Massachusetts, USA, June 19, 2006 Infrared X-ray pump-probe spectroscopy Hans Ågren Department.
Nonlinear Spectroscopy: Characterizing Fluctuations Andrei Tokmakoff MIT Department of Chemistry 2009.

Nonlinear Spectroscopy: Characterizing Fluctuations Andrei Tokmakoff MIT Department of Chemistry 2009.
Time out—states and transitions Spectroscopy—transitions between energy states of a molecule excited by absorption or emission of a photon h =  E = E.

Time out—states and transitions Spectroscopy—transitions between energy states of a molecule excited by absorption or emission of a photon h =  E = E.
TOF Mass Spectrometer &

TOF Mass Spectrometer &
1 Femtosecond Time and Angle-Resolved Photoelectron Spectroscopy of Aqueous Solutions Toshinori Suzuki Kyoto University photoelectron.

1 Femtosecond Time and Angle-Resolved Photoelectron Spectroscopy of Aqueous Solutions Toshinori Suzuki Kyoto University photoelectron.
Matrix isolation and computational study of iso-difluorodibromomethane (F 2 CBr-Br): A route to molecular products in CF 2 Br 2 Photolysis Lisa George,

Matrix isolation and computational study of iso-difluorodibromomethane (F 2 CBr-Br): A route to molecular products in CF 2 Br 2 Photolysis Lisa George,
Evidence of Radiational Transitions in the Triplet Manifold of Large Molecules Haifeng Xu, Philip Johnson Stony Brook University Trevor Sears Brookhaven.

Evidence of Radiational Transitions in the Triplet Manifold of Large Molecules Haifeng Xu, Philip Johnson Stony Brook University Trevor Sears Brookhaven.
Optical Characterization methods Rayleigh scattering Raman scattering transmission photoluminescence excitation photons At a glance  Transmission: “untouched”

Optical Characterization methods Rayleigh scattering Raman scattering transmission photoluminescence excitation photons At a glance  Transmission: “untouched”
Instrumentation in the Molecular Physics Group Presented by: Mats Larsson.

Instrumentation in the Molecular Physics Group Presented by: Mats Larsson.
Mass Spectroscopy Mass spectroscopy is a powerful tool in organic chemistry that can be used to provide information about the molecular formula and structural.

Mass Spectroscopy Mass spectroscopy is a powerful tool in organic chemistry that can be used to provide information about the molecular formula and structural.
States and transitions

States and transitions
Introduction Methods Conclusions Acknowledgement The geometries, energies, and harmonic vibrational frequencies of complexes studied were calculated using.

Introduction Methods Conclusions Acknowledgement The geometries, energies, and harmonic vibrational frequencies of complexes studied were calculated using.
Shaping Pulses Before They are Born Avi Pe’er Physics Department and BINA center for nano-technology, Bar Ilan University FRISNO 11 Shai Yefet, Naaman.

Shaping Pulses Before They are Born Avi Pe’er Physics Department and BINA center for nano-technology, Bar Ilan University FRISNO 11 Shai Yefet, Naaman.
Dynamics in Solid Hydrogen below 4 K David T. Anderson Department of Chemistry, University of Wyoming Laramie, WY 82071-3838 60 th International.

Dynamics in Solid Hydrogen below 4 K David T. Anderson Department of Chemistry, University of Wyoming Laramie, WY th International.
Interaction of laser pulses with atoms and molecules and spectroscopic applications.

Interaction of laser pulses with atoms and molecules and spectroscopic applications.
Spectroscopy and electromagnetic waves. Polarisability of Matter.

Spectroscopy and electromagnetic waves. Polarisability of Matter.

Similar presentations

Ads by Google