Is this project an undergraduate, graduate, or faculty project?

Undergraduate

group

Authors' Class Standing

Hiroki Sugimoto, Graduate Student

Lead Presenter's Name

Hiroki Sugimoto

Faculty Mentor Name

Prof. Giorgio Turri

Abstract

Synchrotron radiation is the light, i.e., photons emitted by accelerating electrons.

ELETTRA operates a third-generation synchrotron with 26 beamlines in Trieste, Italy. The synchrotron is capable of generating lights at wavelengths varying from infrared to hard X-rays.The facility is used for a variety of scientific experiments from materials science to molecular physics.

The Gas Phase Photoemission (GAPH) beamline was used to expose the water molecules to photons in the 60 – 70 eV range and ionize them.

The GAPH beamline is capable of delivering lights of wide energy range from 13.5 eV to more than 900 eV to gaseous systems. The Multi-coincidence chamber at the beamline has ten analyzers mounted along a circle with 30 degree increments. The analyzers allow only electronsat a certain energy level (and at a specific angle) to pass, and can detect the two electrons emitted by the photo-double ionization in coincidence.

The objective of the experiment was to observe photo-double ionization of water molecules by measuring the angles and energy of two electrons with equal sharing of energy (mainly direct process) at coincidence and test for molecular models of water. The data is being analyzed at this point and will be included in the poster.

Future work will involveuneven sharing of the energy between the two photo-electrons, which can be both direct and indirect.

Did this research project receive funding support (Spark or Ignite Grants) from the Office of Undergraduate Research?

Yes, Spark Grant

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Photo-Double Ionization of Water Molecules Using Synchrotron at ELETTRA

Synchrotron radiation is the light, i.e., photons emitted by accelerating electrons.

ELETTRA operates a third-generation synchrotron with 26 beamlines in Trieste, Italy. The synchrotron is capable of generating lights at wavelengths varying from infrared to hard X-rays.The facility is used for a variety of scientific experiments from materials science to molecular physics.

The Gas Phase Photoemission (GAPH) beamline was used to expose the water molecules to photons in the 60 – 70 eV range and ionize them.

The GAPH beamline is capable of delivering lights of wide energy range from 13.5 eV to more than 900 eV to gaseous systems. The Multi-coincidence chamber at the beamline has ten analyzers mounted along a circle with 30 degree increments. The analyzers allow only electronsat a certain energy level (and at a specific angle) to pass, and can detect the two electrons emitted by the photo-double ionization in coincidence.

The objective of the experiment was to observe photo-double ionization of water molecules by measuring the angles and energy of two electrons with equal sharing of energy (mainly direct process) at coincidence and test for molecular models of water. The data is being analyzed at this point and will be included in the poster.

Future work will involveuneven sharing of the energy between the two photo-electrons, which can be both direct and indirect.

 

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