Search results for: Zhihu Yang

Items from 1 to 19 out of 19 results

article

NLRP2 in health and disease

Tongtong Zhang, Fei Xing, Mingcui Qu, Zhihu Yang, more

NLR family pyrin domain containing 2 (NLRP2) is a novel member of the Nod‐like receptor (NLR) family. However, our understanding of NLRP2 has long been ambiguous. NLRP2 may have a role in the innate immune response, but its ‘specific’ functions remain controversial. Although NLRP2 can initiate inflammasome and promote inflammation, it can also downregulate inflammatory signals. Additionally, NLRP2...

article

Visible light emission induced by Krq+ (4≤q≤9) ions colliding with the Cu surface

Yipan Guo, Zhihu Yang, Qiumei Xu, Jieru Ren, more

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions... > 2017 > 406 > PB > 529-532

In this paper, we report visible light emission from 320keV Kr^q+ (4≤q≤9) ions on the Cu target. The wavelength range measured is from 300nm to 656nm. Two Cu I spectra deriving from different initial states and one Kr I line are detected. Specifically, the two Cu I lines belong to transitions 3d¹⁰4p(²P⁰_3/2)−3d¹⁰4s (²S_1/2) at 324.78nm (A) and 3d¹⁰4p(²P⁰_1/2)−3d¹⁰4s(²S_1/2) at 327.42nm (B), respectively,...

article

Effects of payoff-related velocity in the co-evolutionary snowdrift game

Zhihu Yang, Zhi Li, Te Wu, Long Wang

Physica A: Statistical Mechanics and its Applications > 2014 > 393 > Complete > 304-311

Previous studies concerning mobile populations seldom distinguish mobility on the individual level. In these models, all individuals have the identical moving speed and this moving speed has not been clearly defined in terms of its relevance to other features intrinsic to individual. Here we investigate the evolution of cooperation with a minimal co-evolutionary snowdrift game in which the payoff-dependent...

article

L-shell X-ray production of molybdenum and niobium induced by 1500–3500keV Xe26+ ions

Yipan Guo, Zhihu Yang, Zhangyong Song, Qiumei Xu, more

Nuclear Inst. and Methods in Physics Research, B > 2013 > 307 > Complete > 7-10

L-shell X-ray production cross sections are measured for molybdenum and niobium target induced by Xe ²⁶⁺ ions. The incident energy range varies from 1500 to 3500keV. The experimental results are well reproduced by the binding-energy-modified binary encounter approximation model in the united-atom limit. In addition to target L-shell X-ray spectra, we also observe a weak spectrum which corresponds...

article

Role of recommendation in spatial public goods games

Zhihu Yang, Zhi Li, Te Wu, Long Wang

Physica A: Statistical Mechanics and its Applications > 2013 > 392 > 9 > 2038-2045

We study the role of recommendation in a co-evolutionary public goods game in which groups can recommend their members for establishment of new relationships with individuals outside the current group according to group quality. Intriguingly, for square lattices and ER graphs there exists optimal group quality for recommendation that induces positive feedback between cooperation and recommendation...

article

Hunting for wealthy encounters promotes cooperation in spatial Prisoner’s Dilemma games

Zhihu Yang, Te Wu, Zhi Li, Long Wang

The European Physical Journal B > 2013 > 86 > 4 > 1-6

We consider an evolutionary Prisoner’s Dilemma game on the lattice where a parameter α is employed to determine with whom individuals aspire to interact in future iterations. Specifically, for positive α, rich environments are preferentially considered when individuals hunt for new surroundings, while for negative α, the opposite holds. When α = 0, individuals adopt ‘random move’-like migration. The...

article

Observation of K- and L-REC in 200MeV/u Xe54+-N2 collisions at HIRFL-CSR

Deyang Yu, Yingli Xue, Caojie Shao, Zhangyong Song, more

Nuclear Inst. and Methods in Physics Research, B > 2011 > 269 > 7 > 692-694

The 200MeV/u Xe ⁵⁴⁺ ions were utilized to collide with N ₂ molecules and the K- and L-REC, as well as the Lyman lines of Xe ⁵³⁺ were observed. After electron cooling, the ion beam momentum spread ΔP/P≈2.2×10 ⁻⁵ was achieved and the target thickness was stabilized at about 10 ¹³ atom/cm ² . As the first atomic experiment at HIRFL-CSR with the internal...

article

Near infrared lights emission of ⁴⁰Ar¹⁶⁺ impacting on metal surfaces

XiaoAn Zhang, GuoQing Xiao, ZhiHu Yang, Li Wang, more

Science China Physics, Mechanics & Astronomy > 2009 > 52 > 7 > 1021-1026

The highly charged ion ⁴⁰Ar¹⁶⁺ with the velocity (kinetic energy E _K=150 keV, velocity V=8.5×10⁵ m/s) smaller than Bohr velocity (V _Bohr=2.9×10⁶ m/s) was found to hove impacts on the surfaces of metals Ni, Mo, Au and Al, and the Ar atomic infrared light lines and X-rays spectra were simultaneously measured. The experimental results show that the highly charged ion that captures electrons is neutralized,...

article

An outlook of heavy ion driven plasma research at IMP-Lanzhou

Yongtao Zhao, Guoqing Xiao, Hushan Xu, Hongwei Zhao, more

Nuclear Inst. and Methods in Physics Research, B > 2009 > 267 > 1 > 163-166

Since the successful completion of the cooling storage ring (CSR) project in China at the end of 2007, high qualitative heavy ion beams with energy ranging from keV to GeV/u have been available at the Heavy Ion Research Facility at Lanzhou (HIRFL). More than 10 ⁹ 1GeV/u C ⁶⁺ particles or 10 ⁸ 235MeV/u Xe particles can be stored in the CSR main-ring and extracted within hundred...

article

Kinetic energy and charge state effects in the X-ray emission of Mo surface induced by Xe^q+ (q = 25, 29) ions

Ying Cui, ShengSheng Yang, ZhiHu Yang, JinZhang Xu, more

Science China Physics, Mechanics & Astronomy > 2008 > 51 > 9 > 1240-1244

L-shell X-ray spectra of Mo surface induced by Xe²⁵⁺ and Xe²⁹⁺ were measured. The X-ray intensity was obtained in the kinetic energy range of the incident ions from 350 to 600 keV. The relationship of X-ray intensity with kinetic energy of the projectile and its charge state were studied, and the simple explanation was given.

article

X-ray spectra induced by ¹²⁹Xe^q+ impacting the metal surface

XiaoAn Zhang, GuoQing Xiao, ZhiHu Yang, XiMeng Chen, more

Science China Physics, Mechanics & Astronomy > 2008 > 51 > 1 > 82-89

Using the slow highly charged ions ¹²⁹Xe^q+ (q = 25, 26, 27; initial kinetic T ₀⩽4.65 keV/a.u.) to impact Au surface, the Au atomic Mα characteristic X-ray spectrum is induced. The result shows that as long as the charge state of projectile is high enough, the heavy atomic characteristic X-ray can be effectively excited even though the incident beam is very weak (nA magnitude), and the X-ray yield...

article

X-ray spectra induced by slow highly charged Ar^q+ ions in collision with Nb surface

ZhiHu Yang, Ying Cui, XiMeng Chen, ZhangYong Song, more

Science China Physics, Mechanics & Astronomy > 2008 > 51 > 10 > 1463-1469

The X-ray spectra of Nb surface induced by Ar^q+ (q = 16,17) ions with the energy range from 10 to 20 keV/q were studied by the optical spectrum technology. The experimental results indicate that the multi-electron excitation occurred as a highly charged Ar¹⁶⁺ ion was neutralized below the metal surface. The K shell electron of Ar¹⁶⁺ was excited and then de-excited cascadly to emit K X-ray. The intensity...

article

X-ray emission of hollow atoms formed by highly charged argon and xenon ions below a beryllium surface

Yongtao Zhao, Guoqing Xiao, Xiaoan Zhang, Zhihu Yang, more

Nuclear Inst. and Methods in Physics Research, B > 2007 > 258 > 1 > 121-124

The X-ray emission induced by highly charged argon and xenon ions impinging on a beryllium surface is investigated. It is found that spectra of the X-ray induced by Ar ^17,18+ interacting with the surface are very different from those of the X-ray induced by Ar ^17,18+ interacting with residual gases. The result provides an experimental evidence for the existence of hollow atoms below...

article

X-ray spectroscopy of hollow argon atoms formed on a beryllium surface

Yongtao Zhao, Guoqing Xiao, Xiaoan Zhang, Zhihu Yang, more

Nuclear Inst. and Methods in Physics Research, B > 2006 > 245 > 1 > 72-75

The X-rays induced during interaction of highly charged argon ions with a beryllium surface are reported. It is found that the K shell X-ray yield of single particle during interaction of hydrogen-like argon ions was 3.6×10 ⁻³ , which is five orders more than that of helium-like argon ions. Moreover, due to the screening the 2s electron, no K X-ray was emitted during interaction of lithium-like...

article

X-ray spectra induced in highly charged ⁴⁰Ar^q+ interacting with Au surface

Xiao’an Zhang, Guoqing Xiao, Zhihu Yang, Ximeng Chen, more

Science China Physics, Mechanics & Astronomy > 2006 > 49 > 2 > 203-212

By use of optical spectrum technology, the spectra of X-ray induced by highly charged ⁴⁰Ar^q+ ions interacting with Au surface have been studied. The results show that the argon Kα X-ray were emitted from the hollow atoms formed below the surface. There is a process of multi-electron exciting in neutralization of the Ar¹⁶⁺ion, with electronic configuration 1s² in its ground state below the solid surface...

article

Experimental study of highly ionized spectra of titanium

Zhihu Yang, Shubin Du, Hong Su, Yanping Zhang, more

Chinese Science Bulletin > 2004 > 49 > 23 > 2443-2446

The spectra of highly charged titanium ions produced by the interaction of 120 MeV titanium ions with carbon foil were investigated with the so-called beam-foil technique using the HI-13 tandem accelerator in China Institute of Atomic Energy. Spectral lines emitted from fifty-three excited energy levels were observed in the wavelength range 120–220 Å, among which eleven lines were new. Our experimental...

article

Transfer ionization cross-sections measured in collisions of highly charged argon ions with neon target

Xinwen Ma, Huiping Liu, Ximeng Chen, Zhihu Yang, more

Science China Physics, Mechanics & Astronomy > 2003 > 46 > 5 > 552-560

Multiple electron transfer processes are studied for Ar^q++Ne (q=8, 9, 11, 12) collisions by using multi-parameter coincidence techniques. Various electron transfer processes are identified experimentally and the related cross-sections are measured. The dependence of transfer ionization cross-sections on the recoil charge states is compared with the results from the modified molecular classical overbarrier...

article

200 nm–1000 nm spectra of light emitted in the impact of ⁴⁰Ar¹⁰⁺ upon Al and Si solid surfaces

Xiao’an Zhang, Yongtao Zhao, Fuli Li, Zhihu Yang, more

Science China Physics, Mechanics & Astronomy > 2003 > 46 > 5 > 528-534

This paper reports the measured results of the 200 nm–1000 nm characteristic spectral lines of Al, Si and Ar atoms when highly charged ions ⁴⁰Ar¹⁰⁺ are incident upon Al and P-type Si surfaces. The ion ⁴⁰Ar¹⁰⁺ is provided by the ECR ion source of the National Laboratory of the Heavy Ion Accelerator in Lanzhou. The results show that when the low-speed ions in the highly charged state interact with the...

article

Multiple ionization of argon by 170 MeV S9+ ions

Xinwen Ma, Huiping Liu, Youde Wang, Zhihu Yang, more

Nuclear Inst. and Methods in Physics Research, B > 1998 > 146 > 1-4 > 67-69

Multiple ionization in collisions of 170 MeV S ⁹⁺ ions on Ar target atoms was investigated by using time-of-flight (TOF) technique. The charge state distribution of the recoil ions produced in the collisions were determined by the coincident TOF between the projectiles and the recoil ions. The relative recoil ion productions were extracted and compared with the theoretical calculations of...

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Keywords

HIGHLY CHARGED ION (4)
X-RAY (4)
HIGHLY CHARGED IONS (3)
HIGHLY CHARGED ION (HCI) (2)
HOLLOW ATOM (2)
HOLLOW ATOM (HA) (2)
NEUTRALIZATION (2)
X-RAYS (2)
BEAM-FOIL TECHNIQUE (1)
CHARACTERISTIC SPECTRUM (1)
CHARACTERISTIC X-RAY (1)
CLASSICAL OVER-BARRIER MODEL (1)
CO-EVOLUTIONARY PUBLIC GOODS GAME (1)
CO-EVOLUTIONARY SNOWDRIFT GAME (1)
DIRECT RECOMBINATION (DR) (1)
EXCITATION SPECTRA (1)
HEAVY ION (1)
HEAVY ION FUSION (1)
HEAVY ION STORAGE RING (1)
HED PHYSICS (1)
HIGHLY CHARGED ION-ATOM COLLISIONS (1)
HOLLOW (1)
INFLAMMASOME (1)
INFLAMMATION (1)
INFRARED LIGHT LINES (1)
ION–ATOM COLLISION (1)
KINETIC ENERGY AND CHARGE STATE EFFECT (1)
LEVEL LIFETIME (1)
LINKING DYNAMICS (1)
LOW ENERGY (1)
MOBILITY (1)
MODIFIED BEA (1)
MULTI-ELECTRON (1)
MULTI-ELECTRON EXCITATION (1)
MULTIPLE ELECTRON TRANSFER (1)
MULTIPLE IONIZATION (1)
NLR (1)
NLRP2 (1)
PAYOFF-RELATED VELOCITY (1)
PLASMA (1)
RADIATIVE ELECTRON CAPTURE (1)
RECOIL ION PRODUCTION (1)
REPRODUCTIVE DISORDERS (1)
SLOW HIGHLY CHARGED IONS (1)
SPECTRAL INTENSITY (1)
STATISTICAL AND NONLINEAR PHYSICS (1)
SURFACE (1)
TANDEM ACCELERATOR (1)
TEOP TRANSITIONS (1)
TRANSFER IONIZATION CROSS-SECTION (1)
VISIBLE LIGHT (1)
X-RAY PRODUCTION CROSS SECTIONS (1)
XE Q+ (1)
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Search results for: Zhihu Yang

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