Guang Yang

Graduate Student

Center for Free-Electron Laser Science (CFEL)
Deutsches Elektronen-Synchrotron DESY
Notkestrasse 85 (building 99, room O3.016)
22607 Hamburg
Germany

CMI theory

guang.yang@cfel.de

+49-40-8998-6338

Research

Guang's research focuses on experimental and theoretical studies of the nuclear spin dynamics in water and ammonia. High accuracy calculations of the hyperfine structure of water and ammonia molecules will be conducted using the variational approach TROVE developed in our group. For experiment, we will get the high resolution spectroscopy with the help of a Fourier Transform Spectrometer and a tuneable mid-infrared frequency comb source. Then we can search the most promising rovibrational levels for observations of the ortho-para transitions.

Curriculum Vitae

10/2017 - present	PhD Student at Center for Free Electron Laser Science, DESY, Hamburg
09/2014 - 07/2017	MSc. in Optics at the Institute of Opto-Electronics, Shanxi University, China
09/2010 - 08/2014	BSc. in Physics (National Science Base) at the College of Physics and Electronic Engineering, Shanxi University, China

Publications

CFEL Home

Next seminars

Conformer-specific polar Diels–Alder cycloadditions published and selected as Highlight by Nat. Comm.

18 October 2021

There has been a long-standing discussion whether Diels–Alder cycloadditions proceed via stepwise or concerted mechanisms. By combining a conformationally controlled molecular beam with trapped ions, we explored the mechanism of the model polar cycloaddition of conformer-specific 2,3-dibromo-1,3-butadiene with propene ions under single-collision conditions in the gas phase. Both conformers of the diene are reactive with capture-limited reaction rates and a simultaneous competition of concerted and stepwise reaction pathways was found.

Publication on actively learning potential-energy surfaces of molecules

13 October 2021

Using the Born-Oppenheimer approximation requires potential energy surface (PES) for reliable simulations of nuclear dynamics in molecules. Calculating PESs for weakly-bound complexes is especially difficult and computationally expensive due to the loosely bound nature of the intermolecular interactions, which results in a complicated shape of the PESs with potentially several local minima and saddle points.

Recent Publications