Lab News

The Cooke lab is presenting a guest seminar by Dr. K. Douglas from the University of Leeds, on April 5th at 4:30pm in CHEM D213. The seminar is titled: Low temperature chemistry of NH and NH2 relevant to the interstellar medium.

Abstract:
Understanding low temperature gas-phase reactions is vital to understanding a range of environments, ranging from planetary atmospheres to the interstellar medium. However, measuring low temperature rate coefficients in conventional reaction cells is problematic. We employ a Laval nozzle gas expansion technique in order to measure reaction rates at low temperatures. I will present recent result on our experimental and theoretical investigations into the reactions of NH and NH2 with formaldehyde, CH2O, acetaldehyde, CH3CHO, and NO. Reactions with NO display a negative temperature dependence, while the reactions with CH2O and CH3CHO display U-shaped temperature dependence, with the observed rapid increase in rate at low temperature due to quantum mechanical tunnelling through the reaction barrier. The astrochemical implications of the new rate coefficients and branching ratios are also discussed.

Arieh will be contributing to the development of lab instrumentation that will be used to study the interaction of cosmic rays with interstellar dust and ice, which can provide insight into the chemistry of star-forming regions.

The award recognizes Ilsa’s contributions to the discovery of new molecules in space and her work providing a detailed understanding of their reaction mechanisms, thermodynamics, and kinetics through elegant laboratory investigations.

The Laboratory Astrophysics Division (LAD) is a multi-disciplinary division that encompasses experimental and theoretical research, and related observational astronomy and planetary science, with the objective of advancing our understanding of the fundamental processes that drive the Universe.

Ilsa and Carina visited the Astrophysical Chemistry / Low Temperature Nanomaterial Science Group at the Institute of Low Temperature Science (Hokkaido University) in Sapporo, Japan this December. The group studies microscopic physical and chemical processes and evolutionary processes of materials at the atomic and nanoscale that occur in terrestrial and extraterrestrial low-temperature environments, using various experimental techniques.

The International Explosives Conference (IEC) is an international conference for all professionals involved in the fundamental science of explosives and energetic materials. The focus of the conference is future developments and the principal themes for this 2022 inaugural event included (but were not limited to):

Energetic Materials and Characterisation
Manufacturing and Processing
Response to Stimuli
Advances in Experimental Techniques and Diagnostics
Theory, Modelling and Simulation

Ilsa, Carina and Reace visited the Green Bank Observatory in October for the annual GOTHAM meeting! The GBO is situated in the National Radio Quiet Zone and home to the GBT 100 m telescope.