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UID:6a2f3b40-c7a9-46ae-b59a-1ce271a7797f@nexttoyou
DTSTAMP:20261105T153156Z
DTSTART:20261106T193000Z
DTEND:20261106T203000Z
SUMMARY:JILA Thesis Defense - Ya-Chu Chan
LOCATION:JILA X317\, 1900 Colorado Avenue\, Boulder\, CO 80309
DESCRIPTION:Title: High-Resolution Infrared Spectroscopy of Cold Molecules
 : From Small Radicals and Ions to Large Fullerenes\n\nSpeaker: Ya-Chu Cha
 n\n\nEvent Details / Abstract: Spectroscopy provides a powerful tool for 
 probing molecular structure and dynamics\, but extending high-resolution 
 measurements to increasingly complex molecules presents significant chall
 enges. Dense rotational structures\, spectral fragmentation arising from 
 intramolecular vibrational redistribution\, and low-frequency\, large-amp
 litude molecular motions can lead to severe spectral congestion\, making 
 individual transitions difficult to resolve. In this talk\, I will discus
 s how combining sensitive infrared absorption spectroscopy with molecular
  cooling techniques enables detailed studies of molecules ranging from sm
 all reactive radicals to large fullerenes. High-resolution spectroscopy o
 f bromomethylene radical (CHBr) reveals vibrationally induced charge redi
 stribution\, nuclear quadrupole hyperfine interactions\, and non-equilibr
 ium vibrational relaxation. For fullerenes\, cryogenic buffer-gas cooling
  enables direct observation of nuclear-spin statistical effects in C₆₀ an
 d the first rotationally resolved infrared spectrum of C₇₀. Finally\, I w
 ill present recent progress toward higher spectral resolution using an ex
 tracted C₆₀ molecular beam. Together\, these results demonstrate new oppo
 rtunities for precision spectroscopy of increasingly complex molecules.\n
 \nhttp://next-to-u.app/events/6a2f3b40-c7a9-46ae-b59a-1ce271a7797f
URL:http://next-to-u.app/events/6a2f3b40-c7a9-46ae-b59a-1ce271a7797f
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