David has announced his retirement after a distinguished career marked by outstanding contributions to chemical dynamics. The instruments he built uncovered previously unknown details of radical chemistry and allowed him and his collaborators to study the dynamics, kinetics, and mechanisms of short-lived chemical species.
To mark this occasion, colleagues, collaborators, and friends are invited to celebrate his scientific achievements and their lasting impact with this colloquium on chemical dynamics. The program will include talks on a broad range of topics in chemical dynamics, reflecting the breadth and depth of his work.
While David is stepping back from research to spend more time on his many other interests in life, this meeting offers an opportunity to acknowledge his accomplishments and the collegial spirit that has characterized his career.
To help us arrange meals, please fill out the questionnaire about lunch and dinner here.
8:00 – 8:35 Badging (Please see details below)
8:35 – 8:40 Welcome
Session 1 chaired by Nils Hansen
8:40 – 9:00 Daniel Neumark (University of California, Berkeley) – Photodetachment of cold and vibrationally excited anions
9:00 – 9:20 Stephen Leone (University of California, Berkeley) – From Berkeley to Boulder to Sandia, the Impact of David Osborn on the Kinetics and Dynamics of the Leone Group
9:20 – 9:40 Krupa Ramasesha (Sandia National Laboratories) – Pressure-Tuned Ultrafast Vibrational Dynamics in Energetic Materials
9:40 – 10:00 Craig Taatjes (Sandia National Laboratories) – How the isomer-specificity of synchrotron photoionization mass spectrometry has changed chemical kinetics
10:00 – 10:20 Coffee Break
Session 2 chaired by Carl Percival
10:20 – 10:40 Stephen Klippenstein (Argonne National Laboratory) – Reconciling state-of-the-art speciation measurements with first principles theoretical models
10:40 – 11:00 Leonid Sheps (Sandia National Laboratories) – Pushing time-resolved multiplexed photoionization mass spectrometry to high pressures
11:00 – 11:20 Marsha Lester (University of Pennsylvania) – Unimolecular Dynamics of Hydroperoxyalkyl (⦁QOOH) Intermediates
11:20 – 11:40 Rebecca Caravan (Argonne National Laboratory) – David Takes to the Atmosphere: Synchrotron Photoionization Mass Spectrometry Studies of Tropospheric Reactive Intermediates with the Osborn Kinetics Machine
11:40 – 12:00 Andras Bodi (Paul Scherrer Institute) – Coincidences for Analytics: A Long and Winding Road Lit by VUV
12:00 – 13:20 Lunch
Session 3 chaired by Judit Zádor
13:20 – 13:40 Hanna Reisler (University of Southern California) – Joint adventures in searching for elusive carbenes
13:40 – 14:00 Leah Dodson (University of Maryland) – When Reactions Slow Down: Mechanistic Clarity from Controlled and Confined Chemistry
14:00 – 14:20 Coleman Kronawitter (University of California, Davis) – Interrogating relationships between surface and near-surface gas phase compositions to understand mechanisms in heterogeneous catalysis
14:20 – 14:40 Kevin Wilson (Lawrence Berkeley National Laboratory) – Multiphase Chemical Kinetics of Aerosols and Droplets
14:40 – 15:00 Scott Kable (University of New South Wales) and Meredith Jordan (University of Sydney) – Quantum Resonances Steer Chemical Reactions (virtual)
15:00 – 17:00 Refreshments
18:00 – 19:00 Reception at Garré
19:00 – Dinner at Garré
Date: Friday Jan. 16th 2026
Time: 9:00 am – 5:00 pm
Location: Buildings 904 Auditorium, 905/906, Sandia National Labs, Livermore CA, 94550
!! You will need to obtain a badge to attend. We will reach out to you to arrange site access.
!! The badge office closes at noon (12:00 PM) on Fridays. Make sure that you arrive well before noon to pick up your badge should you need one. The badge office is located at the red marker on the left map. Parking is free and most parking spots are open to all.
!! The part of the site where the badge office and the event are should be accessed from Greenville Road, see below. Do not use Vasco Road.
Take the green route on Greenville Road.
