A5015309667- Additive Manufacturing Materials and Processes
- Mass Spectrometry Techniques and Applications
- Laser-Matter Interactions and Applications
- Infrared Thermography in Medicine
- Molecular Spectroscopy and Structure
- Additive Manufacturing and 3D Printing Technologies
- Cold Atom Physics and Bose-Einstein Condensates
- Atomic and Subatomic Physics Research
- Thermography and Photoacoustic Techniques
- Nuclear Materials and Properties
- High Entropy Alloys Studies
- Analytical Chemistry and Chromatography
- Quantum, superfluid, helium dynamics
- Advanced Chemical Physics Studies
University of Connecticut
2022-2024
Roaming is an unconventional type of molecular reaction where fragments, instead immediately dissociating, remain weakly bound due to long-range Coulombic interactions. Due its prevalence and ability form new compounds, roaming fundamental photochemical reactions in small molecules. However, the neutral character fragment indeterminate trajectory make it difficult identify experimentally. Here, we introduce approach image roaming, utilizing intense, femtosecond IR radiation combined with...
Superfluid helium nanodroplets are often considered as transparent and chemically inert nanometer-sized cryo-matrices for high-resolution or time-resolved spectroscopy of embedded molecules clusters. On the other hand, when resonantly excited with XUV radiation, a multitude ultrafast processes initiated, such relaxation into metastable states, formation nanoscopic bubbles excimers, autoionization channels generating low-energy free electrons. Here, we discuss full spectrum observed...
We address new measurement challenges relating to 3D printing in metal powder using the bed fusion technique. Using a combination of confocal microscopy principles and fast, sensitive mid-infrared collection techniques, we present compact versatile method measuring analyzing broadband thermal emissions from vicinity molten pool during additive manufacturing process. demonstrate benefits this instrumentation potential for scientific research as well situ monitoring. Our microscope optics can...
Roaming has been proposed as a possible mechanism contributing to molecular dissociation in which the fragments can move around one another at relatively large intermolecular distances before separating entirely. While roaming, there is sufficient time for other processes occur, lead formation of new compounds. Due neutral character roaming fragments, they follow rather indeterminate trajectory, thus complicating their identification and systematic study. Here, we temporally resolve $H_2$...