中国科学院机构知识库网格系统: 检索

Design of electronic system for 2D hard X-ray spectrum camera on EAST 期刊论文 OAI收割
FUSION ENGINEERING AND DESIGN, 2024, 卷号: 205
作者: Zhou, Run-Hui; Shen, Biao; Lin, Shi-Yao; Cao, Hong-Rui; Zhao, Jin-Long

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收藏 | 浏览/下载：8/0 | 提交时间：2024/11/22

EAST Hard X-ray Energy spectrum 2D Imaging

Asymmetric Hard X-ray Radiation of Two Ribbons in a Thermal-Dominated C-Class Flare 期刊论文 OAI收割
SOLAR PHYSICS, 2024, 卷号: 299, 期号: 7
作者: Shi, Guanglu; Feng, Li; Chen, Jun; Ying, Beili; Li, Shuting

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收藏 | 浏览/下载：13/0 | 提交时间：2024/08/12

Flares Energetic particles Heating In flares Active regions Magnetic fields Spectrum X-ray

X-ray Line-Intensity Ratios in Neon-like Xenon: Significantly Reducing the Discrepancy between Measurements and Simulations 期刊论文 OAI收割
APPLIED SCIENCES-BASEL, 2024, 卷号: 14
作者: Huang, Shihan; Tang, Zhiming; Yang, Yang; Zhang, Hongming; Tian, Ziqiang

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收藏 | 浏览/下载：15/0 | 提交时间：2024/11/20

EBIT fusion plasma diagnostics Neon-like Xenon ions X-ray spectrum

Influence of neutron irradiation on X-ray diffraction, Raman spectrum and photoluminescence from pyrolytic and hot-pressed hexagonal boron nitride 期刊论文 OAI收割
JOURNAL OF LUMINESCENCE, 2023, 卷号: 263
作者: Zhou, Shun; Xu, Wen; Xiao, Yiming; Xiao, Huan; Zhang, Jing

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收藏 | 浏览/下载：26/0 | 提交时间：2023/11/10

Hexagonal boron nitride Neutron irradiation X-ray diffRaction Raman spectrum Photoluminescence

High-rate electrochemical H2O2 production over multimetallic atom catalysts under acidic-neutral conditions 期刊论文 OAI收割
CARBON ENERGY, 2023, 页码: 19
作者: Tong, Yueyu; Liu, Jiaxin; Su, Bing-Jian; Juang, Jenh-Yih; Hou, Feng

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收藏 | 浏览/下载：7/0 | 提交时间：2024/01/07

hydrogen peroxide production multiatom catalysts operando X-ray adsorption spectrum reaction mechanism tendency structure-property relation

Intermediate-mass black holes: finding of episodic, large-scale, and powerful jet activity in a dwarf galaxy 期刊论文 OAI收割
Monthly Notices of the Royal Astronomical Society, 2023, 卷号: 520, 期号: 4, 页码: 5964-5973
作者: Yang, Jun; Paragi, Zsolt; Frey, Sandor; Gurvits, Leonid, I; Liao, Mai

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收藏 | 浏览/下载：1/0 | 提交时间：2024/06/23

galaxies:active galaxies:dwarf individual galaxies:individual:SDSS J090613.77+561015.2 radio continuum:galaxies compact steep-spectrum radio-source counterparts galactic nuclei vlbi observations star-formation x-ray fundamental plane snapshot survey central engine agn Astronomy & Astrophysics

Effect of annealing atmosphere on the structure and spectral properties of GdScO3 and Yb:GdScO3 crystals 期刊论文 OAI收割
ACTA PHYSICA SINICA, 2022, 卷号: 71
作者: Li Jia-Hong; Sun Gui-Hua; Zhang Qing-Li; Wang Xiao-Fei; Zhang De-Ming

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收藏 | 浏览/下载：41/0 | 提交时间：2022/12/23

GdScO3 X-ray diffraction transmission spectrum Raman spectrum

砷锑在铁矿物表面的转化及去除机制研究 学位论文 OAI收割
北京: 中国科学院大学；中国科学院生态环境研究中心, 2020
作者: 蒋宇轩

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收藏 | 浏览/下载：30/0 | 提交时间：2022/06/14

砷锑，环境过程，红外光谱，x 射线吸收谱，界面机制 arsenic, Antimony, Environmental Process, Infrared Spectrum, X-ray Absorption Spectrum, Interfacial Mechanis

Constraining the X-Ray-Infrared Spectral Index of Second-timescale Flares from SGR 1935+2154 with Palomar Gattini-IR 期刊论文 OAI收割
The Astrophysical Journal, 2020, 卷号: 901, 页码: L7
作者: HXMT

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收藏 | 浏览/下载：26/0 | 提交时间：2022/02/08

Radio transient sources Magnetars Soft gamma-ray repeaters 2008 992 1471 Astrophysics - High Energy Astrophysical Phenomena Astrophysics - Instrumentation and Methods for Astrophysics Abstract: The Galactic magnetar SGR 1935+2154 has been reported to produce the first example of a bright millisecond-duration radio burst (FRB 200428) similar to the cosmological population of fast radio bursts (FRBs). The detection of a coincident bright X-ray burst represents the first observed multiwavelength counterpart of an FRB. However, the search for similar emission at optical wavelengths has been hampered by the high inferred extinction on the line of sight. Here, we present results from the first search for second-timescale emission from the source at near-infrared (NIR) wavelengths using the Palomar Gattini-IR observing system in the J band, enabled by a novel detector readout mode that allows short exposure times of ?0.84 s with 99.9% observing efficiency. With a total observing time of ?12 hr (?47,728 images) during its 2020 outburst, we place median 3Ҡlimits on the second-timescale NIR fluence of ?18 Jy ms (13.1 AB mag). The corresponding extinction-corrected limit is ?125 Jy ms for an estimated extinction of A_J = 2.0 mag. Our observations were sensitive enough to easily detect an NIR counterpart of FRB 200428 if the NIR emission falls on the same power law as observed across its radio to X-ray spectrum. We report nondetection limits from epochs of four simultaneous X-ray bursts detected by the Insight-HXMT and NuSTAR telescopes during our observations. These limits provide the most stringent constraints to date on fluence of flares at 10¹⁴ Hz, and constrain the fluence ratio of the NIR emission to coincident X-ray bursts to R_NIR ? 0.025 (fluence index ?0.35).

Comparison of simulated backgrounds with in-orbit observations for HE, ME, and LE onboard Insight-HXMT 期刊论文 OAI收割
Astrophysics and Space Science, 2020, 卷号: 365, 页码: 158
作者: HXMT

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收藏 | 浏览/下载：53/0 | 提交时间：2022/02/08

Insight-HXMT Geant4 simulation Background observation Astrophysics - Instrumentation and Methods for Astrophysics Abstract: Insight-HXMT, the first X-ray astronomical satellite in China, aims to reveal new sources in the Galaxy and to study fundamental physics of X-ray binaries from 1 to 250 keV. It has three collimated telescopes, the High Energy X-ray telescope (HE), the Medium Energy X-ray telescope (ME), and the Low Energy X-ray telescope (LE). Before the launch, in-orbit backgrounds of these three telescopes had been estimated through Geant4 simulation, in order to investigate the instrument performance and the achievement of scientific goals. In this work, these simulated backgrounds are compared with in-orbit observations. Good agreements are shown for all three telescopes. For HE, (1) the deviation of the simulated background rate after two years of operation in space is 5 % from the observation (2) the total background spectrum and the relative abundance of the 67 keV line show long-term increases both in simulations and observations. For ME, (1) the deviation of simulated background rate is within 15 % from the observation, and (2) there are no obvious long-term increase features in the background spectra of simulations and observations. For LE, the background level given by simulations is also consistent with observations. The consistencies of these comparisons validate that the Insight-HXMT mass model, i.e., space environment components and models adopted, physics processes selected, and detector constructions built, is reasonable. However, the line features at 7.5 and 8.0 keV, which are obvious in the observed spectra of LE, are not evident in simulations. This might result from uncertainties in the LE constructions.