Philosophical Magazine Part B最新文献_第3页

Luminescence, emission spectra and hydrogen content of crystalline Lu2SiO5:Ce3+ Lu2SiO5:Ce3+晶体的发光、发射光谱和氢含量

Philosophical Magazine Part B Pub Date : 2002-10-01 DOI: 10.1080/13642810208220731

D. W. Cooke, B. Bennett, K. Mcclellan, R. Muenchausen, J. Tesmer, C. Wetteland

{"title":"Luminescence, emission spectra and hydrogen content of crystalline Lu2SiO5:Ce3+","authors":"D. W. Cooke, B. Bennett, K. Mcclellan, R. Muenchausen, J. Tesmer, C. Wetteland","doi":"10.1080/13642810208220731","DOIUrl":"https://doi.org/10.1080/13642810208220731","url":null,"abstract":"Abstract Thermally stimulated luminescence and emission spectra of cerium-doped Lu2SiO5 have been measured in the temperature interval 10K ⩽ T ⩽ 310K. Eight glow peaks occur with the most intense peak exhibiting a maximum at 306 K. Data analyses show that the peaks generally obey first-order kinetics with thermal activation energies ranging from 0.085 to 0.907 eV. The relatively short lifetime (160 s) of the intense glow peak at 306 K implies that it does not make a significant contribution to the long-lived room-temperature afterglow routinely observed in this phosphor. Spectral emission of the glow peaks is dominated by Ce3+ de-excitation, although additional emission due to trace amounts of Sm3+ is observed for T < 72 K. Elastic recoil detection measurements in nominally undoped and cerium-doped Lu2SiO5 show that the doped specimen contains 3.5–4.0 times more hydrogen within the first 300 nm of the surface than does the undoped sample. However, spectral emission associated with surface hydrogen defects was not observed. Oxygen vacancies, which trap one or more electrons, are proposed as the most likely defect sites in Lu2SiO5. Perturbations of the six- and seven-oxygen-coordinated sites produce a multipeak glow curve with various activation energies and frequency factors. The glow peaks are intrinsic to the C2/c-structured lattice and are independent of the particular rare-earth dopant ion.","PeriodicalId":20016,"journal":{"name":"Philosophical Magazine Part B","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2002-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79429865","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Nanoscale phase separation of GeS2 glass GeS2玻璃的纳米相分离

Philosophical Magazine Part B Pub Date : 2002-10-01 DOI: 10.1080/13642810208220730

Liuchun Cai, P. Boolchand

引用次数: 18

Polycrystalline silicon deposited on glass by subatmospheric-pressure chemical vapour deposition at a high rate 用亚大气压化学气相沉积法在玻璃上快速沉积多晶硅

Philosophical Magazine Part B Pub Date : 2002-10-01 DOI: 10.1080/13642810208220734

P. Münster, M. Sarret, T. Mohammed‐Brahim, N. Coulon, J. Mevellec

引用次数: 7

Exponential absorption edge and implantation-induced modifications in amorphous gallium arsenide 非晶砷化镓的指数吸收边和注入诱导修饰

Philosophical Magazine Part B Pub Date : 2002-10-01 DOI: 10.1080/13642810208220732

I. D. Desnica-Frankovi

引用次数: 3

Effects of the difference between the refractive indices of constituent materials on the light transmittance of glass-particle-dispersed epoxy-matrix optical composites 组成材料折射率差异对玻璃颗粒分散环氧基光学复合材料透光率的影响

Philosophical Magazine Part B Pub Date : 2002-09-01 DOI: 10.1080/13642810208220726

H. Sato, H. Iba, T. Naganuma, Y. Kagawa

{"title":"Effects of the difference between the refractive indices of constituent materials on the light transmittance of glass-particle-dispersed epoxy-matrix optical composites","authors":"H. Sato, H. Iba, T. Naganuma, Y. Kagawa","doi":"10.1080/13642810208220726","DOIUrl":"https://doi.org/10.1080/13642810208220726","url":null,"abstract":"Abstract Glass particles with a size d p of 38–53 μm are incorporated into a clear epoxy matrix and the light transmittance T L of the composites is measured in the wavelength γ range from 200 to 1100 nm. The net difference ▵n c between the refractive indices of the glass particles and the matrix of the fabricated composite ranged from nearly zero to 0.03. This difference between the refractive indices is achieved by, firstly, selecting the optical properties of dispersed glass particles and secondly, changing the thermal stress in the composite. The effect of the difference ▵n c between the refractive indices of the glass particles and the epoxy matrix on the light transmittance of the composite is obtained. It is found that the light transmission spectrum of the composite is correlated with the relationship between the wavelength dispersion curves of the refractive indices of the glass particles and the matrix. At a fixed wavelength, the T L−▵n c curve is only dependent on the particle size and volume fraction. The measured T L−▵n c curves of the composite at a given particle volume fraction and a given particle size show that the maximum light transmittance of the composite appears when ▵n c ≈ 0. The value is about 92% and is nearly the same as that of the pure epoxy matrix.","PeriodicalId":20016,"journal":{"name":"Philosophical Magazine Part B","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2002-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82595575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 37

Magnetic interactions in (Pr, La)3RuO7 and Pr3(Ru, Nb)O7 (Pr, La)3RuO7和Pr3(Ru, Nb)O7的磁相互作用

Philosophical Magazine Part B Pub Date : 2002-09-01 DOI: 10.1080/13642810208220728

Z. X. Zhou, G. Cao, S. McCall, J. Crow, R. P. Guertin, C. Mielke, D. Rickel

引用次数: 1

Phase profiles of transmitted light through glass-particle-dispersed epoxy-matrix composites 透射光通过玻璃颗粒分散环氧基复合材料的相位分布

Philosophical Magazine Part B Pub Date : 2002-09-01 DOI: 10.1080/13642810208220727

K. Matsumura, Yutaka Kagawa

引用次数: 4

Magnetic-inclusion-enhanced circular susceptibility in axially magnetized Co–Fe–Si–B amorphous wires 磁包体增强轴向磁化Co-Fe-Si-B非晶线的圆磁化率

Philosophical Magazine Part B Pub Date : 2002-08-01 DOI: 10.1080/13642810208218365

D. Chen, L. Pascual

引用次数: 1

Unified hopping model for dc and ac conduction in chalcogenide glasses 硫系玻璃中直流和交流传导的统一跳变模型

Philosophical Magazine Part B Pub Date : 2002-08-01 DOI: 10.1080/13642810208218366

F. Abdel-Wahab

引用次数: 13

Spin-polarized Auger electron spectroscopy 自旋极化俄歇电子能谱

Philosophical Magazine Part B Pub Date : 2002-08-01 DOI: 10.1080/13642810208218364

U. Pustogowa

引用次数: 0