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Slow Decay Processes of Electrostatically Trapped Rydberg NO Molecules.

A Deller1, M H Rayment1, S D Hogan1

  • 1Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom.

Physical Review Letters
|August 29, 2020
PubMed
Summary
This summary is machine-generated.

Researchers decelerated and trapped nitric oxide (NO) molecules in Rydberg-Stark states using a chip-based decelerator. This study offers new insights into the lifetimes and blackbody radiation effects on these excited molecular states.

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Area of Science:

  • Physical Chemistry
  • Atomic and Molecular Physics
  • Quantum Mechanics

Background:

  • Nitric oxide (NO) molecules are crucial in various chemical and physical processes.
  • Rydberg states, highly excited electronic states of atoms and molecules, are sensitive probes of their environment.
  • Controlling and studying molecules in these states is challenging due to their short lifetimes and sensitivity.

Purpose of the Study:

  • To photoexcite nitric oxide (NO) molecules into long-lived hydrogenic Rydberg-Stark states.
  • To decelerate and electrostatically trap these excited NO molecules using a novel chip-based transmission-line decelerator.
  • To investigate the lifetimes and blackbody radiation effects on these trapped Rydberg states.

Main Methods:

  • Utilizing pulsed supersonic beams to prepare NO molecules.
  • Employing photoexcitation to create Rydberg-Stark states.
  • Using a cryogenically cooled, chip-based transmission-line Rydberg-Stark decelerator for molecule manipulation.
  • In-situ detection via pulsed electric field ionization.
  • Comparing experimental data with numerical trajectory calculations for validation.

Main Results:

  • Successfully decelerated and trapped NO molecules in Rydberg-Stark states.
  • Validated the performance of the Rydberg-Stark decelerator through experimental and computational comparisons.
  • Observed the decay of trapped molecules over timescales up to 1 ms.
  • Gained new insights into the lifetimes of NO Rydberg states.

Conclusions:

  • Demonstrated the capability of a chip-based Rydberg-Stark decelerator for controlling excited molecules.
  • Provided valuable data on the stability and decay dynamics of NO Rydberg states.
  • Highlighted the influence of blackbody radiation on the observed lifetimes of these states.