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	No pulsed radio emission during a bursting phase of a Galactic magnetar 期刊论文 OAI收割 Nature, 2020, 卷号: 587, 页码: 63-65 作者: HXMT \| 收藏 \| 浏览/下载：44/0 \| 提交时间：2022/02/08 Astrophysics - High Energy Astrophysical Phenomena Abstract: Fast radio bursts (FRBs) are millisecond-duration radio transients of unknown physical origin observed at extragalactic distances^1-3. It has long been speculated that magnetars are the engine powering repeating bursts from FRB sources^4-13, but no convincing evidence has been collected so far¹⁴. Recently, the Galactic magnetar SRG 1935+2154 entered an active phase by emitting intense soft íray bursts¹⁵. One FRB-like event with two peaks (FRB 200428) and a luminosity slightly lower than the faintest extragalactic FRBs was detected from the source, in association with a soft íray/hard-X-ray flare^18-21. Here we report an eight-hour targeted radio observational campaign comprising four sessions and assisted by multi-wavelength (optical and hard-X-ray) data. During the third session, 29 soft-íray repeater (SGR) bursts were detected in íray energies. Throughout the observing period, we detected no single dispersed pulsed emission coincident with the arrivals of SGR bursts, but unfortunately we were not observing when the FRB was detected. The non-detection places a fluence upper limit that is eight orders of magnitude lower than the fluence of FRB 200428. Our results suggest that FRB-SGR burst associations are rare. FRBs may be highly relativistic and geometrically beamed, or FRB-like events associated with SGR bursts may have narrow spectra and characteristic frequencies outside the observed band. It is also possible that the physical conditions required to achieve coherent radiation in SGR bursts are difficult to satisfy, and that only under extreme conditions could an FRB be associated with an SGR burst.
	Identification of Metal Components Characteristic Peak Position of Energy Dispersive X-Ray Fluorescence Spectra Based on the Wavelet Transformation 期刊论文 OAI收割 SPECTROSCOPY AND SPECTRAL ANALYSIS, 2018, 卷号: 38, 期号: 6, 页码: 1904-1909 作者: Zhang Wei; Xu Hua; Duan Lian-fei; Ma Ming-jun; Gan Ting-ting \| 收藏 \| 浏览/下载：22/0 \| 提交时间：2019/11/12 X-ray fluorescence Wavelet transformation Modulus maxima Characteristic peak
	Photoelectric characteristics of silicon P-N junction with nanopillar texture: Analysis of X-ray photoelectron spectroscopy 期刊论文 OAI收割 CHINESE PHYSICS B, 2014, 卷号: 23, 期号: 9, 页码: 96101 作者: Liu J(刘静); Wang JO(王嘉鸥); Yi FT(伊福廷); Liu, J; Wang, JO 收藏 \| 浏览/下载：39/0 \| 提交时间：2016/04/08 X-ray photoelectron spectroscopy (XPS) photoelectric characteristic P-N junction silicon nanopillar
	Characteristic X-rays generation under the action of femtosecond laser pulses on nano-structured targets 期刊论文 OAI收割 LASER AND PARTICLE BEAMS, 2011, 卷号: 29, 页码: 249-254 作者: Ovchinnikov, A. V.; Kostenko, O. F.; Chefonov, O. V.; Rosmej, O. N.; Andreev, N. E. \| 收藏 \| 浏览/下载：17/0 \| 提交时间：2018/05/31 Characteristic X-ray radiation Hot electrons Laser-matter interaction Nano-structured targets
	Investigation of characteristic microstructures of wild ginseng by X-ray phase contrast microscopy 期刊论文 OAI收割 ACTA PHYSICA SINICA, 2010, 卷号: 59, 期号: 8, 页码: 12 Xue, YL; Xiao, TQ; Wu, LH; Chen, C; Guo, RY; Du, GH; Xie, HL; Deng, BA; Ren, YQ; Xu, HJ 收藏 \| 浏览/下载：206/0 \| 提交时间：2012/04/11 x-ray phase contrast microscopy synchrotron radiation microscopic identification characteristic microstructures of ginseng
	X-ray spectra induced by Xe-129(q+) impacting the metal surface 期刊论文 OAI收割 SCIENCE IN CHINA SERIES G-PHYSICS MECHANICS & ASTRONOMY, 2008, 卷号: 51, 期号: 1, 页码: 82-89 作者: Zhang XiaoAn; Xiao GuoQing; Yang Zhihu; Chen XiMeng; Zhao YongTao \| 收藏 \| 浏览/下载：12/0 \| 提交时间：2010/10/29 slow highly charged ions characteristic X-ray level lifetime
	Polarization characteristic measurements of,the synchrotron radiation beamline based on multilayer 期刊论文 OAI收割 HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION, 2007, 卷号: 31, 期号: 4, 页码: 400-404 作者: Sun LJ(孙立娟); Cui MQ(崔明启); Zhu J(朱杰); Zhao YD(赵屹东); Zheng L(郑雷) 收藏 \| 浏览/下载：15/0 \| 提交时间：2016/06/28 synchrotron radiation soft X-ray polarimeter multilayer polarized element measurement of polarization characteristic
	An important mechanism of crop breeding with ultralow energy ion implantation 期刊论文 OAI收割 NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 1998, 卷号: 134, 页码: 191-194 作者: Wei, ZQ; Han, GW; Zhou, GM; Li, Q; Xie, HM \| 收藏 \| 浏览/下载：22/0 \| 提交时间：2018/05/31 mechanism ion implantation characteristic X-ray synchrotron-radiation survival fraction micronucleus frequency
	An important mechanism of crop breeding with ultralow energy ionimplantation 期刊论文 OAI收割 NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM, 1998, 卷号: 134, 期号: 2, 页码: 191-194 Wei; ZQHan; GWZhou; GMLi; QXie; HMGao \| 收藏 \| 浏览/下载：9/0 \| 提交时间：2011/08/26 Mechanism Ion implantatIon Characteristic X-ray