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Nuclear fusion from Coulomb explosions of deuterated methane clusters subjected to ultraintense femtosecond laser pulses

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Chinese Physics B 2009年第2期18卷 537-541页

作者：卢海洋王成陈光龙 Kim Cheol-Jung 刘建胜倪国权李儒新徐至展 State Key Laboratory of High Field Laser Physics Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Korea Atomic Energy Research Institute

This paper reports that Coulomb explosions taken place in the experiment of heteronuclear deuterated methane clusters （（CD4）n） in a gas jet subjected to intense femtoseeond laser pulses （170 mJ, 70 fs） have led to table-top laser driven DD nuclear fusion. The clusters produced in supersonic expansion had an average size of about 5 nm in radius and the laser intensity used was 3 × 10^17 W/cm^*** measured maximum and average energies of deuterons produced in the laser-cluster interaction were 60 and 13.5 keV, respectively. Prom DD collisions of energetic deuterons, a yield of 2.5（±0.4） × 10^4 fusion neutrons of 2.45 MeV per shot was realized, giving rise to a neutron production efficiency of about 1.5 × 10^5 per joule of incident laser pulse energy. Theoretical calculations were performed and a fairly good agreement of the calculated neutron yield with that obtained from the present experiment was found.

关键词： molecular clusters Coulomb explosion DD nuclear fusion intense femtosecond lasers

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Energetic Protons Emitted from Coulomb Explosion Dynamics of Large-Sized Hydrogen clusters Driven by an Ultrashort Intense Laser Pulse

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Chinese Physics Letters 2006年第11期23卷 2956-2959页

作者：李洪玉刘建胜王成倪国权李儒新徐至展 State Key Laboratory of High Field Laser Physics Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Shanghai 201800

Protons with very high kinetic energy of about lOkeV and the saturation effect of proton energy for laser intensity have been observed in the interaction of an ultrashort intense laser pulse with large-sized hydrogen dusters. Including the cluster-size distribution as well as the laser-intensity distribution on the focus spot, the theoretical calculations based on a simplified Coulomb explosion model have been compared with our experimental measurements, which are in good agreement with each other.

关键词： molecular clusters NUCLEAR-DYNAMICS DEUTERIUM clusters ATOMIC clusters FIELDS IONIZATION ELECTRON GASES

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Wearable membranes from zirconium-oxo clusters cross-linked polymer networks for ultrafast chemical warfare agents decontamination

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Chinese Chemical Letters 2022年第6期33卷 3241-3244页

作者： Litao Ma Jiamin Xie Xiaoshan Yan Zhiwei Fan Heguo Li Lin Lu Likun Chen Yi Xin Panchao Yin South China Advanced Institute for Soft Matter Science and Technology&State Key Laboratory of Luminescent Materials and Devices University of Technology Guangzhou 510641China State Key Laboratory of NBC Protection for Civilian Research Institution of Chemical DefenseBeijing 100191China

The urgent need for immediate personal protection against chemical warfare agents(CWAs)spurs the requirement on robust and highly efficient catalytic systems that can be conveniently integrated to wearable ***,as a new concept for CWA decontamination catalyst design,sub-nanoscale,catalytically active zirconium-oxo molecular clusters are covalently integrated in flexible polymer network as crosslinkers for the full exposure of catalytic sites as well as robust framework *** obtained membrane catalysts exhibit high swelling ratio with aqueous content as 84 wt%and therefore,demonstrate quasi-homogeneous catalytic activity toward the rapid hydrolysis of both CWA,soman(GD)(t_(1/2)=5.0 min)and CWA simulant,methyl paraoxon(DMNP)(t_(1/2)=8.9 min).Meanwhile,due to the covalent nature of cross-linkages and the high flexibility of polymer strands,the membranes possess promising mechanical strength and toughness that can stand the impact of high gas pressures and show high permeation for both CO_(2)and O_(2),enabling their extended applications in the field of collective/personal protective materials with body comfort.

关键词： molecular clusters Chemical warfare agents Catalysis Polymer nanocomposites Wearable devices

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Redshift of Excitation Wavelength Caused by the Concentration of L-Tryptophan in Water: A Theoretical and Experimental Study

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Open Journal of Physical Chemistry 2021年第2期11卷 87-105页

作者： Diana Milena Uriza-Prias Antonio Méndez-Blas Juan Francisco Rivas-Silva Instituto de Física “Luis Rivera Terrazas” Benemérita Universidad Autónoma de Puebla Puebla México

A redshift in the wavelength of excitation spectra is experimentally measured as a function of the concentration parameter for tryptophan solutions in water. To understand the microscopic causes of this behavior, theo... 详细信息

关键词： Excitation Spectra Tryptophan Concentration Polar Solvent molecular clusters Time-Dependent Density Functional Theory (TD-DFT) Methods Electronic Transitions Fluorescence

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Photoelectron Spectroscopy and Theoretical Study of Aerosol clusters

Photoelectron Spectroscopy and Theoretical Study of Aerosol ...

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第十五届全国化学动力学会议

作者：王学斌 Physical Sciences Division Pacific Northwest National Laboratory

Both field measurements and laboratory experiments have shown the significant roles of the clusters formed by sulfuric acid/bisulfate, oxidized organics, and/or water. The size of these clusters falls in about 1-2 nanometers, in which key steps of new particle formation（NPF） processes occur. To better understand NPF processes and develop more accurate climate models, we have been employing a cluster model approach--integrated negative ion photoelectron spectroscopy（NIPES） and ab initio quantum computations to probing the structures, energetics, and thermochemistry of these clusters. The clusters we have studied include those formed by sulfuric acid/bisulfate and a wide range of organics from the oxidation products of both biogenic and anthropogenic emissions and their hydrates. We have obtained direct experimental evidence showing significant thermodynamic advantage of organics to promote formation and growth of the sulfuric acid/bisulfate clusters and aerosols, as well as the homogenous organic complexes. We employed the average carbon oxidation state and O/C ratio by taking into account of the carbon number and the type of functional groups（like hydroxyl, carbonyl, and carboxylic） to rationalize and predicate the extent of the enhanced roles of different organics in the aerosol formation and growth processes.

关键词： photoelectron spectroscopy molecular clusters aerosols proton transfer

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