报告人：

Prof. Daniel M.   Neumark

Department of Chemistry,   University of California, Berkeley

主持人：

房喻 教授

报告时间：

2019年3月25日（星期一）10:00

报告地点：

长安校区化学化工学院致知楼1668报告厅

报告摘要：The unimolecular isomerization of   vinylidene (H2CC) to acetylene and the photodissociation dynamics of IBr are   investigated using two complementary techniques: high resolution   photoelectron spectroscopy of cryogenically-cooled anions and attosecond   transient absorption. In the anion experiments, H2CCˉ anions are   photodetached to access various vibrational levels of weakly bound H2CC;   variations in the peak widths and underlying structure point to highly   state-specific isomerization dynamics, thus resolving a long-standing   controversy into the isomerization “lifetime” of vinylidene. In the   attosecond experiments, IBr is photodissociated with one or two visible   photons. The dissociation dynamics are monitored using an attosecond XUV   pulse with sufficient bandwidth to probe core-to-valence transitions in both   the I and Br atoms. The resulting transient absorption spectra map out the adiabatic   and non-adiabatic pathways associated with curve-crossings en route to   dissociation.

报告人简介

Academic   Education/Degrees:        

Ph.D., Physical Chemistry, University   of California, Berkeley 1984

M.A., Chemistry, Harvard University,   1977

B.A., Chemistry and Physics, Harvard   University, 1977

Honors and   Awards:

Peter Debye   Award in Physical Chemistry, American Chemical Society, 2019

Bourke   Award, Royal Society of Chemistry, 2018

Member,   National Academy of Sciences, 2015

Chemical   Dynamics Award, Royal Society of Chemistry, 2013

Dudley R.   Herschbach Medal, 2009

Irving   Langmuir Award in Chemical Physics, American Chemical Society, 2008

Academic/Professional   Appointments:

Chair,   Department of Chemistry, University of California, Berkeley, 2010-2014

Director,   Chemical Sciences Division, Lawrence Berkeley National Laboratory, 2000-2010

Member,   Board of Reviewing Editors, Science Magazine, 2013-present

应用表面与胶体化学教育部重点实验室

应用表面与胶体化学创新引智基地

化学化工学院