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	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 \| 收藏 \| 浏览/下载：49/0 \| 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.
	DFT and experimental investigations of the formation and adsorption of enolic species on Al2O3 catalyst 期刊论文 OAI收割 JOURNAL OF MOLECULAR STRUCTURE, 2008, 卷号: 892, 期号: 2015-01-03, 页码: 320-324 Gao, Hongwei; He, Hong; Yu, Yunbo; Yan, Tingxia 收藏 \| 浏览/下载：46/0 \| 提交时间：2015/08/20 DFT In situ DRIFTS Simulated spectra Enolic species Al2O3 catalyst
	Theoretical and experiment studies on the adsorption of formate species on the surface of catalyst 期刊论文 OAI收割 JOURNAL OF MOLECULAR STRUCTURE, 2008, 卷号: 891, 期号: 2015-01-03, 页码: 242-246 Gao, Hongwei; He, Hong; Zhang, Changbin; Yan, Tingxia 收藏 \| 浏览/下载：24/0 \| 提交时间：2015/08/20 DFT In situ DRIFTS Simulated spectra Formate Cu-Al(2)O(3) catalyst
	Theoretical and experimental analysis on vibrational spectra of formate species adsorbed on Cu-Al2O3 catalyst 期刊论文 OAI收割 JOURNAL OF MOLECULAR STRUCTURE-THEOCHEM, 2008, 卷号: 857, 期号: 2015-01-03, 页码: 38-43 作者: Gao, Hongwei; Yan, Tingxia; Zhang, Changbin; He, Hong 收藏 \| 浏览/下载：24/0 \| 提交时间：2015/08/20 DFT in situ DRIFTS simulated spectra formate Cu-Al2O3 catalyst