jrm.phys.ksu.eduJames R. Macdonald Lab: Atomic, Molecular and Optical Physics

We no longer support Internet Explorer 6. Please upgrade or change browsers . James R. Macdonald Laboratory KSU About Us » AMO @ JRM Experimental Theoretical Education KOS Facilities » HITS KLS PULSAR Tandem Cryebis ECR Source MOT LUMOS UNFO Computing Photo Gallery What's New Opportunities » Jobs Graduate Study GRA Stipends People » Faculty Staff Postdocs Students Publications » All Publications Abstract Search -- Journal Search AMO Seminars Meetings AMO Databases Operations » Schedules » KLS HITS , PULSAR Tandem ECR/EBIS Calendar Computing FAQ Tutorials & Docs Web Mail Safety » Policies Key Requests Training Exam MSDS Links JRM Home Physics Home Search Ultrafast Ring Opening K-State physicists have taken extremely fast snapshots of light-induced molecular ring-opening reactions — similar to those that help a human body produce vitamin D from sunlight. The research is published in Nature Chemistry and more popularly explained in a K-State press release . "Think of this as stop-motion like a cartoon," said Daniel Rolles , associate professor of Physics and the principal investigator. "For each molecule, you start the reaction with a laser pulse, take snapshots of what it looks like as time passes and then put them together. This creates a 'molecular movie' that shows how the electronic structure of the molecule changes as a function of how much time passes between when we start and when we stop." Shashank Pathak, doctoral student and lead author on the paper, said the idea was to study the dynamics of how a ring opens in a molecule on the time scale of femtosecond, which is one quadrillionth of a second. The researchers use a free-electron laser to visualize how these reactions happen by recording electron energy spectra as the atoms in the molecule move apart. Masks are now required statewide ! K-State's response to COVID-19. -- The K-State Framework for Reawakening . See KSU and JRM adjusted Fall calendars. Zoom teleconferencing . -- We no longer support Internet Explorer 6. Please upgrade or change browsers . Power is off in Cardwell this weekend. Network will be down. End news box -- Recently Published Papers: Tracking the ultraviolet-induced photochemistry of thiophenone during and after ultrafast ring opening S Pathak, L M Ibele, R Boll, C Callegari, A Demidovich, B Erk, R Feifel, R Forbes, M Di Fraia, L Giannessi, C S Hansen, D M P Holland, R A Ingle, R Mason, O Plekan, K C Prince, A Rouzée, R J Squibb, J Tross, M N R Ashfold, B F E Curchod, D Rolles Nature Chemistry 0 , 0 (2020) See also the K-State press release, " Lights, camera, action... ." Validity of the static-exchange approximation for inner-shell photoionization of polyatomic molecules Carlos A. Marante, Loren Greenman, Cynthia S. Trevisan, Thomas N. Rescigno, C. William McCurdy, Robert R. Lucchese Phys. Rev. A 102 , 012815 (2020) Find more of our Publications... This Week at JRM Week of 26 July 2020 Phase 3 Reopening Mon 1:30 pm Nuts & Bolts News & reports, via Zoom Tue Wed Wed 1:30 pm AMO Seminar Zilong Wang, LMU/MPQ, via Zoom -- Thu Fri See full calendar... What's New? The sad news of the death of Professor Emeritus Tom Gray has reached us. Tom earned his PhD at Florida State in 1967, joined us in the 1970s, led our Linac project among other things, and retired in 2003. More news and a full obituary will follow soon. Read more news... 306 Cardwell Hall 1228 N. 17th Street Kansas State University Manhattan, KS, USA 66506-2604 Voice: 785-532-1527 Fax: 785-532-6806 Mail: JRML_Director foo Attosecond Physics 2009 -- Search WWW Search JRM Advanced Search | Sitemap | Webmaster...