中国科学院机构知识库网格系统: 检索

Research on flame temperature measurement method based on water vapor emission spectrum 期刊论文 OAI收割
MEASUREMENT SCIENCE AND TECHNOLOGY, 2023, 卷号: 34, 期号: 5, 页码: 10
作者: Zhou GX(周功喜); Li F(李飞); Lin X(林鑫); Li RJ(李仁杰); Meng DD(孟东东)

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收藏 | 浏览/下载：35/0 | 提交时间：2023/03/15

water vapor spectrum high temperature measurement self-absorption intensity ratio

An underlying clock in the extreme flip-flop state transitions of the black hole transient Swift J1658.2-4242 期刊论文 OAI收割
Astronomy and Astrophysics, 2020, 卷号: 641, 页码: A101
作者: HXMT

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收藏 | 浏览/下载：65/0 | 提交时间：2022/02/08

accretion accretion disks black hole physics X-rays: binaries time Astrophysics - High Energy Astrophysical Phenomena Abstract:
Aims: Flip-flops are top-hat-like X-ray flux variations, which have been observed in some transient accreting black hole binary systems, and feature simultaneous changes in the spectral hardness and the power density spectrum (PDS). They occur at a crucial time in the evolution of these systems, when the accretion disc emission starts to dominate over coronal emission. Flip-flops remain a poorly understood phenomenon, so we aim to thoroughly investigate them in a system featuring several such transitions.
Methods: Within the multitude of observations of Swift J1658.2-4242 during its outburst in early 2018, we detected 15 flip-flops, enabling a detailed analysis of their individual properties and the differences between them. We present observations by XMM-Newton, NuSTAR, Astrosat, Swift, Insight-HXMT, INTEGRAL, and ATCA. We analysed their light curves, searched for periodicities, computed their PDSs, and fitted their X-ray spectra, to investigate the source behaviour during flip-flop transitions and how the interval featuring flip-flops differs from the rest of the outburst.
Results: The flip-flops of Swift J1658.2-4242 are of an extreme variety, exhibiting flux differences of up to 77% within 100 s, which is much larger than what has been seen previously. We observed radical changes in the PDS simultaneous with the sharp flux variations, featuring transitions between the quasi-periodic oscillation types C and A, which have never been observed before. Changes in the PDS are delayed, but more rapid than changes in the light curve. Flip-flops occur in two intervals within the outburst, separated by about two weeks in which these phenomena were not seen. Transitions between the two flip-flop states occurred at random integer multiples of a fundamental period of 2.761 ks in the first interval and 2.61 ks in the second. Spectral analysis reveals the high and low flux flip-flop states to be very similar, but distinct from intervals lacking flip-flops. A change of the inner temperature of the accretion disc is responsible for most of the flux difference in the flip-flops. We also highlight the importance of correcting for the influence of the dust scattering halo on the X-ray spectra.

Measurement of CO2 concentration at high-temperature based on tunable diode laser absorption spectroscopy 期刊论文 OAI收割
INFRARED PHYSICS & TECHNOLOGY, 2017, 卷号: 80, 期号: 无, 页码: 131-137
作者: Chen, Jiuying; Li, Chuanrong; Zhou, Mei; Liu, Jianguo; Kan, Ruifeng

收藏 | 浏览/下载：24/0 | 提交时间：2018/05/02

Tunable Diode Laser Absorption Spectroscopy Co2 Concentration Line Intensity High-temperature Spectrum

Extraction of normal electron self-energy and pairing self-energy in the superconducting state of the Bi2Sr2CaCu2O8 superconductor via laser-based angle-resolved photoemission 期刊论文 OAI收割
PHYSICAL REVIEW B, 2012, 卷号: 85, 期号: 6
Zhang, WT; Bok, JM; Yun, JH; He, JF; Liu, GD; Zhao, L; Liu, HY; Meng, JQ; Jia, XW; Peng, YY; Mou, DX; Liu, SY; Yu, L; He, SL; Dong, XL; Zhang, J; Wen, JS; Xu, ZJ; Gu, GD; Wang, GL; Zhu, Y; Wang, XY; Peng, QJ; Wang, ZM; Zhang, SJ; Yang, F; Chen, CT; Xu, ZY; Choi, HY; Varma, CM; Zhou, XJ

收藏 | 浏览/下载：88/0 | 提交时间：2013/09/17

HIGH-TEMPERATURE SUPERCONDUCTORS CUPRATE SUPERCONDUCTORS QUASI-PARTICLES PHONON SPECTRUM T-C TRANSITION EXCITATION DISPERSION RESONANCE STRENGTH

Measurement of integral diffraction coefficients of crystals on beamline 4B7 of Beijing Synchrotron Radiation Facility 期刊论文 OAI收割
CHINESE PHYSICS B, 2011, 卷号: 20, 期号: 1, 页码: 10705
作者: Yang, JM; Gan, XS; Zhao, Y; Cui, MQ; Zhu, T

收藏 | 浏览/下载：37/0 | 提交时间：2016/06/29

integral dirraction coefficient crystal x-ray spectrum measurement high temperature plasmas

Measurement of integral diffraction coefficients of crystals on beamline 4B7 of Beijing Synchrotron Radiation Facility 期刊论文 OAI收割
Chinese Physics B, 2011, 期号: 1, 页码: 280-287
作者: Yang JM(杨家敏); Gan XS(甘新式); Zhao Y(赵阳); Cui MQ(崔明启); Zhu T(朱托)

收藏 | 浏览/下载：15/0 | 提交时间：2015/12/25

integral diffraction coefficient crystal x-ray spectrum measurement high temperature plasmas

Local compressibility and substitutional site for the dominant Cr(3+)-centered octahedron in LaMgAl(11)O(19) crystal 期刊论文 OAI收割
Physica B-Condensed Matter, 2010, 卷号: 405, 期号: 1, 页码: 218-220
W. L. Feng; W. Q. Yang; W. C. Zheng

收藏 | 浏览/下载：24/0 | 提交时间：2012/04/13

Crystal-field theory Local compressibility Substitutional site Optical spectrum Cr(3+) LaMgAl(11)O(19) high-pressure spectroscopy temperature spectra cr2o3 ions ruby

High resolution angle-resolved photoemission spectroscopy on Cu-based and Fe-based high-T-c superconductors 期刊论文 OAI收割
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE, 2010, 卷号: 207, 期号: 12, 页码: 2674
Zhou, XJ; Liu, GD; Meng, JQ; Zhang, WT; Liu, HY; Zhao, L; Jia, XW

收藏 | 浏览/下载：25/0 | 提交时间：2013/09/17

HIGH-TEMPERATURE SUPERCONDUCTORS SPIN-DENSITY-WAVE 2 ENERGY SCALES FERMI-SURFACE CUPRATE SUPERCONDUCTORS ELECTRONIC-STRUCTURE HIGH-T(C) SUPERCONDUCTORS QUANTUM OSCILLATIONS EXCITATION SPECTRUM SUPERFLUID DENSITY

Temperature characteristics of high power vertical cavity surface emitting lasers (EI CONFERENCE) 会议论文 OAI收割
Semiconductor Lasers and Applications III, November 12, 2007 - November 13, 2007, Beijing, China
作者: Qin L.

收藏 | 浏览/下载：32/0 | 提交时间：2013/03/25

By using oxidation confinement technology high power vertical-cavity surface-emitting lasers are fabricated in experiment. The electrical and optical performance characteristics such as threshold current efficiency emission wavelength and output power are measured under continuous wave (CW) condition at room temperature. The maximum output power is up to watt regime at wavelength of about 980nm. The temperature characteristics of the device are investigated experimentally in detail. The variation in lasing threshold current with temperature is studied. The characteristic temperature T0 of the device is derived and the value is about 211K. Such a high characteristic temperature T0 of threshold current can lead to good temperature sensitivity of the device. At the same time the lasing spectrum characteristics with temperature are also measured. The wavelength shift with temperature is just about 0.06nm/K. From the measured results it is shown that the device can still operate at high temperature condition.

X 射线转换屏用Tb3+激活磷酸盐发光玻璃 期刊论文 OAI收割
光子学报, 2008, 卷号: 37, 期号: s1, 页码: 78, 80
何冬兵; 于春雷; 胡丽丽

收藏 | 浏览/下载：1288/365 | 提交时间：2009/09/24

Co-doped Digital radiographies Emission spectrums Excitation spectrum High temperature melt-annealing method Medical devices Phosphate glass Promising materials Scintillating glass X-ray conversion screens Space resolutions Tb³⁺-activated phosphate luminescent glass Uv excitations X-ray luminescences