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	Excitonic properties of vertically aligned ZnO nanotubes under high-density excitation (EI CONFERENCE) 会议论文 OAI收割 Lu Y. M.; Liang H. W.; Shen D. Z.; Zhang Z. Z.; Zhang J. Y.; Zhao D. X.; Liu Y. C.; Fan X. W. 收藏 \| 浏览/下载：13/0 \| 提交时间：2013/03/25 In this paper highly oriented and vertically arranged ZnO nanotubes are prepared on Al2O3 (0 0 0 1) substrate without employing any metal catalysts by plasma-assisted molecular beam epitaxy. The photoluminescence (PL) spectra at room temperature are studied under high excitation densities. Under lower excitation density (60 kW/cm2) PL spectrum shows that one strong free exciton emission (FE) locates at 3.306 eV. As the excitation density increases up to 200 kW/cm2 a new emission peak (Pn) located at low-energy side of FE is attributed to the spontaneous emission due to an exciton-exciton (Ex-E x) scattering process from two ground state excitons where one exciton is recombined by emitting a photon and the other is scattered into the excited states of n=2 3 4.... Under excitation density of 300 kW/cm 2 the stimulated emission originating from Ex-E x scattering is obtained. When the excitation density is above 580 kW/cm2 the emission from electron-hole plasma is observed in low-energy side of the P band and indicates a typical superradiation recombination processes with increasing excitation density. 2006 Elsevier B.V. All rights reserved.
	Energy upconversion in erbium doped oxyfluoride tellurite glass (EI CONFERENCE) 会议论文 OAI收割 ICO20: Materials and Nanostructures, August 21, 2005 - August 26, 2005, Changchun, China 作者: Chen B.; Xie Y.; Wang X.; Wang X.; Wang X. 收藏 \| 浏览/下载：15/0 \| 提交时间：2013/03/25 In this article we have investigated energy upconversion process in erbium doped oxyfuoride tellurite glasses exciated with 980 nm diode laser. The glasses used in measurements are with a mol% composition of 70TeO2-9PbF2-190AlF3-10BaF2-1Er2O3. The s intensity parameters the radiative rates the branching ratios and the fluorescence lifetimes were calculated based upon the Judd-Ofelt theory and the experimental absorption spectrum. Under 980 nm excitation efficient 530 544 and 665 nm upconversion emission are due to two-photon absorption processes.
	Photon events with missing energy in e(+)e(-) collisions at root s=130 to 209 GeV 期刊论文 OAI收割 EUROPEAN PHYSICAL JOURNAL C, 2005, 卷号: 38, 期号: 4, 页码: 395-411 作者: DELPHI Collaboration 收藏 \| 浏览/下载：21/0 \| 提交时间：2015/12/02 MEDIATED SUPERSYMMETRY-BREAKING MONTE-CARLO SIMULATION LOWEST ORDER CALCULATIONS ROOT-S MULTIPHOTON EVENTS SINGLE-PHOTON 2-PHOTON PROCESSES BHABHA SCATTERING LIGHT GRAVITINO SEARCH
	Searches for supersymmetric particles in e(+)e(-) collisions up to 208 GeV and interpretation of the results within the MSSM 期刊论文 OAI收割 EUROPEAN PHYSICAL JOURNAL C, EUROPEAN PHYSICAL JOURNAL C, 2003, 2003, 卷号: 31, 31, 期号: 4, 页码: 421-479, 421-479 作者: DELPHI Collaboration \| 收藏 \| 浏览/下载：29/0 \| 提交时间：2015/12/02 MONTE-CARLO SIMULATION LOWEST ORDER CALCULATIONS RADIATIVE-CORRECTIONS LIGHTEST NEUTRALINO DELPHI DETECTOR ROOT-S 2-PHOTON PROCESSES CONFIDENCE-LIMITS E+E ANNIHILATION MASS-DEGENERATE MONTE-CARLO SIMULATION LOWEST ORDER CALCULATIONS RADIATIVE-CORRECTIONS LIGHTEST NEUTRALINO DELPHI DETECTOR ROOT-S 2-PHOTON PROCESSES CONFIDENCE-LIMITS E+E ANNIHILATION MASS-DEGENERATE
	Single intermediate vector boson production in e(+)e(-) collisions at root s=183 and 189 GeV 期刊论文 OAI收割 PHYSICS LETTERS B, 2001, 卷号: 515, 期号: 3--4, 页码: 238-254 作者: DELPHI Collaboration 收藏 \| 浏览/下载：24/0 \| 提交时间：2015/12/02 MONTE-CARLO SIMULATION LOWEST ORDER CALCULATIONS 2-PHOTON PROCESSES BHABHA SCATTERING PROGRAM DELPHI COUPLINGS COLLIDERS PHYSICS LEP2
	Measurements of the cross sections for open chasm and beauty production in gamma gamma collisions at root s=189-202 GeV 期刊论文 OAI收割 PHYSICS LETTERS B, 2001, 卷号: 503, 期号: 1--2, 页码: 10-20 - 收藏 \| 浏览/下载：18/0 \| 提交时间：2015/12/02 PHOTON-PHOTON COLLISIONS HEAVY-QUARK PRODUCTION 2-PHOTON PROCESSES CHARM PRODUCTION PARTON DISTRIBUTIONS PAIR PRODUCTION L3 EXPERIMENT MONTE-CARLO LEP TRISTAN
	Measurement of the photon structure function at high Q(2) at LEP 期刊论文 OAI收割 PHYSICS LETTERS B, 2000, 卷号: 483, 期号: 4, 页码: 373-386 - 收藏 \| 浏览/下载：10/0 \| 提交时间：2015/12/02 STRUCTURE-FUNCTION F-2(GAMMA) STRUCTURE-FUNCTION F2 MONTE-CARLO SIMULATION 2-PHOTON PROCESSES VIRTUAL PHOTONS Q2 GEV2 COLLISIONS SCATTERING ENERGIES
	*Measurement of inclusive D(+/-) production in two-photon collisions at LEP** 期刊论文 OAI收割 PHYSICS LETTERS B, 1999, 卷号: 467, 期号: 1--2, 页码: 137-146 - 收藏 \| 浏览/下载：13/0 \| 提交时间：2015/12/02 2-PHOTON PROCESSES CROSS-SECTION CHARM PRODUCTION PAIR PRODUCTION L3 EXPERIMENT TRISTAN DETECTOR ENERGIES EVENTS MESONS
	Inclusive charm production in two-photon collisions at LEP 期刊论文 OAI收割 PHYSICS LETTERS B, 1999, 卷号: 453, 期号: 1--2, 页码: 83-93 - 收藏 \| 浏览/下载：17/0 \| 提交时间：2015/12/02 HEAVY-QUARK PRODUCTION LUND MONTE-CARLO 2-PHOTON PROCESSES CROSS-SECTION JET FRAGMENTATION PAIR PRODUCTION L3 EXPERIMENT E+E-PHYSICS DETECTOR ENERGIES