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| 1 | Probing Molecular Frame Wigner Time Delay and Electron Wavepacket Phase Structure of CO Molecule显示文摘The time delay of photoelectron emission serves as a fundamental building block to understand the ultrafast electron emission dynamics in strong-field physics.Here,we study the photoelectron angular streaking of CO molecules by using two-color(400+800nm)corotating circularly polarized fields.By coincidently measuring photoelectrons with the dissociative ions,we present molecular frame photoelectron angular distributions with respect to the instantaneous driving electric field signatures.We develop a semiclassical nonadiabatic molecular quantum-trajectory Monte Carlo(MO-QTMC)model that fully captures the experimental observations and further ab initio simulations.We disentangle the orientation-resolved contribution of the anisotropic ionic potential and the molecular orbital structure on the measured photoelectron angular distributions.Furthermore,by analyzing the photoelectron interference patterns,we extract the sub-Coulomb-barrier phase distribution of the photoelectron wavepacket and reconstruct the orientation-and energy-resolved Wigner time delay in the molecular frame.Holographic angular streaking with bicircular fields can be used for probing polyatomic molecules in the future. | Zhenning Guo Peipei Ge Yiqi Fang Yankun Dou Xiaoyang Yu Jiguo Wang Qihuang Gong Yunquan Liu | 2022 | Ultrafast Science2022，，2： | 1 |
| 2 | Atomic Study of Hardening Mechanism Induced by Hebubble显示文摘Due to its excellent thermal-mechanical properties,such as high strength,low irradiation swelling,low thermal expansivity,high thermal conductivity,F/M steels are considered as the candidate structural materials for Gen-Ⅳreactors and fusion reactors.During the service,neutron can cause transmutation reactions producing helium in the material.Helium is insoluble and | JIA Lixia HE Xinfu DOU Yankun WU Shi WANG Dongjie CAO Han YANG Wen | 2017 | Annual Report of China Institute of Atomic Energy2017，，1： | 0 |
| 3 | Physics Based Model on Light Water Reactor Vessel Irradiation Embrittlement Prediction显示文摘Light water reactor vessel would undergo performance degradation within longtime normal operation,which generally referring to embrittlement,the main cause world-widely believed as neutron enhanced or induced evolution of microstructure features,such as copper rich precipitation(CRP)or clusters,matrix damages(MD),as well as solute atom(mainly P)segregation | WANG Dongjie HE Xinfu DOU Yankun JIA Lixia WU Shi CAO Han YANG Wen | 2017 | Annual Report of China Institute of Atomic Energy2017，，1： | 0 |
| 4 | Simulation of Cascade in BCC Iron显示文摘When the material is irradiated,the incident particles interact with the lattice atoms of materials,experiencing the processes of collision,defect formation and annealing,which eventually lead to the evolution of the microstructure inside the material.After the collision of incident particles and lattice atoms,primary knock-on atoms(PKA)are produced first.Then,PKA trigger | CAO Han HE Xinfu DOU Yankun JIA Lixia WU Shi WANG Dongjie YANG Wen | 2017 | Annual Report of China Institute of Atomic Energy2017，，1： | 0 |
| 5 | Study of Effect of Mn on Hardening Induced by Cu Precipitates in bcc Fe Matrix显示文摘Cu precipitate is one of the major contributors to the hardening and embrittlement in pressurized water reactor pressure vessels steels(RPV).As the research going,solute elements were observed in rich Cu precipitates by 3Datomprobe tomography,such as Ni,and Mn.The appearance of Ni and Mn in RPV can significantly affect the formation and stability of rich Cu precipitates.Up to now,the influence of Ni | DOU Yankun HE Xinfu JIA Lixia WANG Dongjie WU Shi CAO Han YANG Wen | 2017 | Annual Report of China Institute of Atomic Energy2017，，1： | 0 |
| 6 | Probing the orbital angular momentum of intense vortex pulses with strong-field ionization显示文摘With the rapid development of femtosecond lasers,the generation and application of optical vortices have been extended to the regime of intense-light-matter interaction.The characterization of the orbital angular momentum(OAM)of intense vortex pulses is very critical.Here,we propose and demonstrate a novel photoelectron-based scheme that can in situ distinguish the OAM of the focused intense femtosecond optical vortices without the modification of light helical phase.We employ two-color co-rotating intense circular fields in the strong-field photoionization experiment,in which one color light field is a plane wave serving as the probing pulses and the other one is the vortex pulses whose OAM needs to be characterized.We show that by controlling the spatial profile of the probing pulses,the OAM of the vortex pulses can be clearly identified by measuring the corresponding photoelectron momentum distributions or angle-resolved yields.This work provides a novel in situ detection scenario for the light pulse vorticity and has implications for the studies of ultrafast and intense complex light fields with optical OAM. | Yiqi Fang Zhenning Guo Peipei Ge Yankun Dou Yongkai Deng Qihuang Gong Yunquan Liu | 2022 | Light(Science & Applications)2022，11，2： | 0 |
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