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Shell effect and capture cross sections in the synthesis of superheavy nuclei

Science china(physics,Mechanics & Astronomy) 2009年第10期52卷 1489-1493页

作者： DU SaiSai1,2,BIAN BaoAn1,2,3,LIU Min1,2,4,FENG ZhaoQing5,6 & ZHANG FengShou1,2,6 1 Key Laboratory of Beam technology and Material Modification of Ministry of Education,college of Nuclear Science and technology,Beijing normal university,Beijing 100875,china 2 Beijing Radiation Center,Beijing 100875,china 3 School of Science,Jiangnan university,Wuxi 214122,china 4 college of physics and technology,guangxi normal university,guilin 541004,china 5 Institute of Modern physics,Chinese Academy of Sciences,Lanzhou 730000,china 6 Center of Theoretical Nuclear physics,National Laboratory of Heavy Ion Accelerator of Lanzhou,Lanzhou 730000,china Key Laboratory of Beam technology and Material Modification of Ministry of Education College of Nuclear Science and Technology Beijing Normal University Beijing China Beijing Radiation Center Beijing China School of Science Jiangnan University Wuxi China college of physics and technology Guangxi Normal University Guilin China Institute of Modern physics Chinese Academy of Sciences Lanzhou China Center of Theoretical Nuclear physics National Laboratory of Heavy Ion Accelerator of Lanzhou Lanzhou China

The shell effect is included in the improved isospin dependent quantum molecular dynamics model in which the shell correction energy of the system is calculated by using the deformed two-center shell model. A switch function is introduced to connect the shell correction energy of the projectile and the target with that of the compound nucleus during the dynamical fusion process. It is found that the calculated capture cross sections reproduce the experimental data quantitatively at the energy near the Coulomb barrier. The capture cross sections for reaction 35 80 Br + 82 208 Pb → 117 288 X are also calculated and discussed.

关键词： superheavy nuclei transport theory shell effect cross sections

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Modelling Accelerating Growth with Intermittent Processes in Evolving Networks

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Communications in Theoretical physics 2007年第12期48卷 1119-1122页

作者： YUAN Wu-Jie~(1,2)and LUO Xiao-Shu~1~1 college of physics and Electronic Engineering,guangxi normal university,guilin 541004,china~2 Department of physics,Huaibei Coal Industry Teachers college,Huaibei 235000,china college of physics and Electronic Engineering Guangxi Normal University Guilin 541004 China Department of physics Huaibei Coal Industry Teachers College Huaibei 235000 China

In this paper,the acceleratingly growing network model with intermittent processes is *** thegrowing network,there exist both accelerating and intermittent *** network is grown from the number ofnodes mo and the number of links added with each new node is a nonlinearly increasing function m+aNβ（t）f（t）,whereN（t） is the number of nodes present at time t.f（t） is the periodic and bistable function with period T,whose values are1 and 0 indicating accelerating and intermittent processes,*** we denote the ratio r of acceleration timeto whole *** study the degree distribution p（k） of the model,focusing on the dependence of p（k） on the networkparameters τ,T,m,α,N,and β.It is found that there exists a phase transition point,kc such that if kc,then p（k）obeys a power-law distribution with exponent -γ1,while if k>kc,then p（k） exhibits a power-law distribution withexponent-γ2.Moreover,the exponents γ1 and γ2 are independent of τ,T,m,a,and N,while they depend only onthe parameter β.More interesting,the phase transition point is described by kc=aNβ,which is equal to the value atwhich p（k） is maximum in GM model.

关键词： acceleratingly growing network intermittent process power-law distribution

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A POISSON-GAUSSIAN MODEL TO PRICE EUROPEAN OPTIONS ON THE EXTREMUM OF SEVERAL RISKY ASSETS WITHIN THE HJM FRAMEWORK

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Journal of Systems Science & Complexity 2010年第4期23卷 769-783页

作者： Guohe DENG Lihong HUANG School of Mathematics Guangxi Normal University Guilin 541004 China. college of Mathematics and Econometrics Hunan University Changsha 410082 China

This paper generalizes European call options on the extremum of several risky assets in a Poisson-Gaussian model which allows both the risky assets and stochastic interest rates moving randomly with jump risks. The stochastic interest rate is assumed to follow an extended multi-factor HJM model with jumps. The authors provide explicitly the closed-form solutions of these options through the change of numeralre technique and examine the effects of both jump risks and stochastic interest rate on the option price with numerical experiment. The model can be seen as an extension of Stulz （1982）, Johnson （1987） and Lindset （2006）.

关键词： Extremum options jump-diffusion model stochastic interest rate.

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Analysis of Neutron Double-Differential Cross Section of n+14N at 14.2 MeV

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Communications in Theoretical physics 2005年第7期44卷 128-132页

作者： YAN Yu--Liang DUAN Jun--Feng SUN Xiao--Jun WANG Ji--Min ZHANG Jing--Shang china Institute of Atomic Energy, P. O. Box 275(41), Beijing 102413, china college of physics and Information technology, guangxi normal university, guilin 541004, china china Institute of Atomic Energy P.O. Box 275(41) Beijing 102413 China college of physics and Information technology Guangxi Normal University Guilin 541004 China

By using a new reaction model for light nuclei,the double-differential cross section of n+14N reactions atE_n=14.2 MeV has been *** the case of n+（14）N reactions,the reaction mechanism is cery complex,there areover one hundred opened partial reaction channels even at incident energy En=14.2 *** this paper the openedreaction channels are listed in detail. With LUNF code the model calculation is performed to analyze the double-differential cross sections of total outgoing neutron. The calculated results agree fairly with the experimenal *** indicate that the pre-equilibrium mechanism mechanism dominates the whole reation processes,and the recoil effect in lightnuclear reactions is essentially important.5He emission has been considered,but it is only a small contribution to thedonble-differential cross section at incident energy En=14.2 MeV.

关键词： light nucleus reaction double-differential cross section

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Optical waveguides in LiNbO_3 and stoichiometric LiNbO_3 crystals by proton exchange

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Science china(physics,Mechanics & Astronomy) 2008年第10期51卷 1479-1488页

作者： LI ShiLing college of physics and Engineering, Qufu normal university, Qufu 273165, china School of physics and Microelectronics, Shandong university, Jinan 250100, china college of physics and Engineering Qufu Normal University Qufu China School of physics and Microelectronics Shandong University Jinan China

The formation of optical planar waveguides in LiNbO3 and stoichiometric LiNbO3 crystals by proton exchange was reported. The prism-coupling method was used to characterize the dark-line spectroscopy at the wavelength of 633 and 1539 nm, re-spectively. The mode optical near-field outputs from proton-exchanged LiNbO3 and SLN waveguides at 633 nm were presented. The mode field from stoichiometric LiNbO3 (SLN) waveguide is lighter and more uniform than that from LiNbO3 waveguide, which means the quality of the waveguide in SLN crystal is better than that of the LiNbO3 waveguide. For proton-exchanged LiNbO3 waveguides, the evo-lution of the refractive index profile with annealing was presented. The disorder profiles of Nb atoms in proton-exchanged LiNbO3 waveguides were obtained by Rutherford backscattering/channeling technique. It is shown that the longer the exchange time, the larger the displacement of Nb atoms.

关键词： optical waveguide proton exchange LiNbO3 crystal stoichiometric LiNbO3 crystal

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Magnetic Field Controllable Photocurrent Properties in BiFe_(0.9)Ni_(0.1)O_(3)/La_(0.7)Sr_(0.3)MnO_(3) Laminate Thin Film

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Energy & Environmental Materials 2024年第2期7卷 381-388页

作者： Guanzhong Huo Ke Wang Qingying Ye Shuiyuan Chen Chao Su Yuxiang Zhang guilin Chen Zhigao Huang Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials College of Physics and EnergyFujian Normal UniversityFuzhou 350117China Fujian Provincial Engineering technology Research Center of Solar Energy Conversion and Energy Storage Fuzhou 350117China

This paper reports a multifunctional magnetic-photoelectric laminate device based on the integration of spintronic material(La_(0.7)Sr_(0.3)MnO_(3))and multiferroic(Ni-doped BiFeO_(3)),in which the repeatable modulation effect on the photoelectric properties were achieved by applying external magnetic *** obviously,photocurrent density(J)of the laminate was largely enhanced,the change rate of J up to 287.6%is *** sensing function effect should be attributed to the low-field magnetoresistance effect in perovskite manganite and the scattering of spin photoelectron in multiferroic *** laminate perfectly combines the functions of sensor and controller,which can not only reflect the intensity of environmental magnetic field,but also modulate the photoelectric conversion *** work provides an alternative and facile way to realize multi-degree-of-freedom control for photoelectric conversion performances and lastly miniaturize multifunction device.

关键词： bismuth ferrite low-field magnetoresistance effect magnetic field modulation perovskite manganite photocurrent

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Codimension 3 nonresonant bifurcations of homoclinic orbits with two inclination flips

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Science china Mathematics 2005年第2期48卷 248-260页

作者： SHUI Shuliang & ZHU Deming college of Mathematics and physics, Zhejiang normal university, Jinhua 321004, china Department of Mathematics, East china normal university, Shanghai 200062, china college of Mathematics and physics Zhejiang Normal University Jinhua China Department of Mathematics East China Normal University Shanghai China

Homoclinic bifurcations in four-dimensional vector fields are investigated by setting up a local coordinate near a homoclinic orbit. This homoclinic orbit is principal but its stable and unstable foliations take inclination flip. The existence, nonexistence, and uniqueness of the 1-homoclinic orbit and 1-periodic orbit are studied. The existence of the two-fold 1-periodic orbit and three-fold 1 -periodic orbit are also obtained. It is indicated that the number of periodic orbits bifurcated from this kind of homoclinic orbits depends heavily on the strength of the inclination flip.

关键词： bifurcation, homoclinic orbit, non-resonance, inclination flip, 1-periodic orbit.

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Luminosity-peak energy relation in the decay phases of gamma-ray burst pulses

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Science china(physics,Mechanics & Astronomy) 2010年第1期53卷 163-170页

作者： LU RuiJing & LIANG EnWei Physical Science & technology college, guangxi university, Nanning 530004, china Physical Science & technology college Guangxi University Nanning China

Using time-resolved spectral data for a sample of 30 pulses in 27 bright GRBs detected with CGRO/BATSE, we investigate the luminosity-peak energy relation (L-E p relation) in the decay phases of these pulses. A tight L-E p relation is found for most of the pulses, but its power law index is various among pulses, which is normally distributed at 1.84±0.60(1σ) for the pulses in our sample, roughly consistent with the L-E p relation within a GRB and the isotropic gamma-ray energy-E p relation among GRBs. The large scatter of the power law index cannot be explained with both the statistical or observational effects and it may be an intrinsic feature, indicating that no universal L-E p relation would be expected among GRBs/pulses. This may strongly weaken the cosmological use of this relation.

关键词： gamma ray bursts observations statistical luminosity-peak energy relation

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Probing into the Sino-American Cross-National Marriage Failures:An Intercultural Perspective

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广西师范大学学报（哲学社会科学版） 2002年第S2期38卷 140-145页

作者： LIU Ji (Foreign Languages college,guangxi normal university, guilin 541004, china)

With china’s opening to the outside world, Chinese people’s attitude toward marriage has been undergoing great changes. Cross National marriages(CNMs) emerge as a result of economic development, social progress, cultural exchanges and freedom of marriage. However, according to statistics, CNMs are not always successful and satisfactory as they look: the divorce rate is reported to be on the increase. The paper studies several Sino American CNM cases which ended in failure from an intercultural perspective, and on that bases it points out that it is not cultural differences but people’s attitudes toward cultural differences that lead to the breakdown of the CNMs. In this paper, ethnocentrism is specially discussed as a major barrier to successful intercultural communication. And suggestions such as developing empathy, learning about cultural adaptation are offered to improve the quality of the CNMs and the competence of intercultural communication.

关键词： cross national marriages failure intercultural communication cultural differences ethnocentrism suggestions

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Accurate studies on the full vibrational energy spectra and molecular dissociation energies for some electronic states of N_(2)molecule

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Science china(physics,Mechanics & Astronomy) 2005年第4期48卷 385-398页

作者： REN Weiyi1,2, SUN Weiguo1, HOU Shilin3 & FENG Hao4 1. Institute of physics, college of Chemical Engineering, Sichuan university, Chengdu 610065, china 2. Institute of Theoretical physics, Xihua normal university, Nanchong 637002, china 3. Department of physics, china Oceanography university, Qingdao 266003, china 4. college of physics, Sichuan university, Chengdu 610065, china Institute of physics College of Chemical Engineering Sichuan University Chengdu China Institute of Theoretical physics Xihua Normal University Nanchong China Department of physics China Oceanography University Qingdao China college of physics Sichuan University Chengdu China

It is usually very difficult to directly obtain molecular dissociation energy De and all accurate high-lying vibrational energies for most diatomic electronic states using modern experimental techniques or quantum theories, and it is also very difficult to give accurate analytical expression for diatomic molecular dissociation energy. This study proposes a new analytical formula for obtaining accurate molecular dissociation energy based on the LeRoy and Bernstein’s energy expression in dissociation limit. A set of full vibrational energy spectra for some electronic states of N2 molecule are studied using the algebraic method (AM) suggested recently, and the corresponding accurate molecular dissociation energies are evaluated using the proposed new formula and high-lying AM vibrational energies. The results show that the AM spectra and the new theoretical dissociation energies agree excellently with experimental data, and thereby providing a new physical approach to generating accurate dissociation energies for electronic states of diatomic molecules.

关键词： vibrational energy, dissociation energy, nitrogen molecule, algebraic method.

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