机构

• 高能物理研究所 [13]
• 长春光学精密机械与物... [2]

采集方式

• OAI收割 [14]
• iSwitch采集 [1]

内容类型

• 期刊论文 [13]
• 会议论文 [2]

发表日期

• 2020 [1]
• 2018 [1]
• 2017 [2]
• 2015 [1]
• 2012 [3]
• 2011 [1]
• 更多

学科主题

• Physics [5]
• Astronomy ... [1]

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浏览/检索结果: 共15条，第1-10条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择提交时间升序提交时间降序发表日期升序发表日期降序题名升序题名降序作者升序作者降序 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：36/0  |  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.   The Lambda(b) -> Lambda (-> p pi(- ))mu(+)mu(-) decay in the RSc model 期刊论文  OAI收割 JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS, 2018, 卷号: 45, 期号: 9, 页码: 95007 作者:  Aslam, MJ;  Bhutta, FM;  Nasrullah, A   |  收藏  |  浏览/下载：22/0  |  提交时间：2019/09/24 rare flavor-changing neutral-current decays  beyond standard model  new physics   B → ssd? decay in randall-sundrum models**supported by cas-twas president’s fellowship programme 2014, ucas-bhp billiton scholarship, and national natural science foundation of china (11375208, 11521505, 11235005, 11621131001) 期刊论文  iSwitch采集 Chinese physics c, 2017, 卷号: 41, 期号: 5 作者:  Lü,Cai-Dian;  Munir,Faisal;  Qin,Qin 收藏  |  浏览/下载：19/0  |  提交时间：2019/04/23 13.25.hw  Rare b decays  New physics  Flavor-changing neutral-current   b -> ss(d)over-bar decay in Randall-Sundrum models 期刊论文  OAI收割 CHINESE PHYSICS C中国物理. C, 2017, 卷号: 41, 期号: 5, 页码: 53106 作者:  Lu, CD;  Qin, Q;  Munir, F;  Qin Z(秦溱);  Lv CD(吕才典)   |  收藏  |  浏览/下载：8/0  |  提交时间：2019/08/27 rare B decays  new physics  flavor-changing neutral-current   Search for pair-produced long-lived neutral particles decaying to jets in the ATLAS hadronic calorimeter in pp collisions at root s=8 TeV 期刊论文  OAI收割 PHYSICS LETTERS B, 2015, 卷号: 743, 页码: 15-34 作者:  ATLAS Collaboration 收藏  |  浏览/下载：9/0  |  提交时间：2016/04/18 High-energy collider experiment  Long-lived neutral particle  New physics   Mini-review of rare charmonium decays at BESIII 期刊论文  OAI收割 Chinese Physics C, 2012, 期号: 10, 页码: 932-940 作者:  Li HB(李海波);  Zhu SH(朱世海) 收藏  |  浏览/下载：9/0  |  提交时间：2015/12/21 BESⅢ  charmonium  weak decay  new physics  lepton flavor violation   The study of B→K~(*)l~+l~- decays in family non-universal Z′ models 期刊论文  OAI收割 中国物理C, 2012, 期号: 8, 页码: 14-24 作者:  Jiang ZW(蒋正伟);  Li RH(李润辉);  Lv CD(吕才典) 收藏  |  浏览/下载：13/0  |  提交时间：2015/12/10 forward-backward asymmetry  new physics  semi-leptonic decay   The study of B -> K-(*())l(+)l(-) decays in family non-universal Z ' models 期刊论文  OAI收割 CHINESE PHYSICS C, 2012, 卷号: 36, 期号: 1, 页码: 14-24 作者:  Chiang, CW;  Li RH(李润辉);  吕长典; Li, RH;  Lu, CD 收藏  |  浏览/下载：18/0  |  提交时间：2016/04/08 forward-backward asymmetry  new physics  semi-leptonic decay   STUDY OF CP VIOLATION IN Lambda(+)(c) DECAY 期刊论文  OAI收割 INTERNATIONAL JOURNAL OF MODERN PHYSICS A, 2011, 卷号: 26, 期号: 15, 页码: 2523-2535 作者:  Kang XW(康现伟);  李海波(实);  Kang, XW;  Li, HB;  Lu, GR 收藏  |  浏览/下载：22/0  |  提交时间：2016/06/29 CP violation  new physics  helicity  two-Higgs doublet model   Manufacture of 1.2m reaction bonded silicon carbide mirror blank CFID (EI CONFERENCE) 会议论文  OAI收割 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, April 26, 2010 - April 29, 2010, Dalian, China 作者:  Zhang G.;  Zhang G.;  Zhang G. 收藏  |  浏览/下载：16/0  |  提交时间：2013/03/25 Silicon carbide (SiC) is a new type candidate material for large-scale lightweight space mirror. Its low thermal distortion  high stiffness  fine optical quality and dimensional stability  make SiC an ideal material for large space born telescope. Since ten years Changchun institute optics  fine mechanics and physics (CIOMP) has developed reaction bonded SiC (RB-SiC) technology for space application  and can fabricate RB-SiC mirror with scale less than 1.0 meter for telescope. The green body is prepared with gel-casting method which is an attractive new ceramic forming process for making high-quality  complex-shaped ceramic parts. And then unmolding  drying  binder burning out  reacting bonded  the RB-SiC can be obtained. But with the development of space-born or ground telescope  the scale of primary mirror has exceeded 1.0 meter. So CIOMP has developed an assembly technique which called novel reaction-formed joint technology for larger RB-SiC mirror blank. The steps include joining of green bodies with mixture comprised of SiC particles and phenolic resin etc  firing  machining and sintering. Joining the 1.2 meter RB-SiC mirror blank by the novel reaction-formed joint technology. And testing the welding layer's performance  the results show that the thickness of 54-77m  the microstructure and thermal property can be comparable to the substrate and the mechanical property are excellent in bending strength of 307MPa. 2010 Copyright SPIE - The International Society for Optical Engineering.