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DOI	10.1016/j.gca.2021.01.022
	Alpha-decay induced shortening of fission tracks simulated by in situ ion irradiation
	Li, Weixing; Cheng, Yuanyuan; Feng, Lei; Niu, Jingjing; Liu, Yingxin; Skuratov, Vladimir A.; Zdorovets, Maxim, V; Boatner, Lynn A.; Ewing, Rodney C.
通讯作者	Li, WX (通讯作者)
发表日期	2021
ISSN	0016-7037
EISSN	1872-9533
起始页码	1
结束页码	14
卷号	299
英文摘要	The diffusion of defects (e.g., vacancies and interstitials) and elements used for dating (e.g., He and Pb) in a mineral structure is a thermal process: This is the primary assumption used to determine the age and thermal history of minerals. For instance, thermal history reconstruction, through the number and length distribution of tracks produced by spontaneous fission of U-238, is obtained by assuming a thermal event to be the only energy source for shortening of fission tracks. Here, we report a new, non-thermal energy source that induces additional shortening of fission tracks by the irradiation of alpha-recoils from the alpha-decay of U-238 and Th-232. We simulate alpha-decay induced track-shortening by combining ion accelerator irradiations with transmission electron microscopy. This allows for the first observation of track-shrinkage during in situ ion irradiation. We show that rather than alpha-particles, alpha-recoils induce a significant shortening of fission tracks by nuclear-collisions. The shortening of track-length can be quantified as a function of alpha-decay event dose. However, apatite is less sensitive than zircon to this non-thermal process. The findings exemplify the interactions among different types of self-irradiation from alpha-particles, alpha-recoils and fission-fragment nuclei in single mineral grains and have important implications for the use of zircon and apatite for radiometric dating and thermochronology. (C) 2021 Elsevier Ltd. All rights reserved.
英文关键词	Zircon; Apatite; Fission tracks; Alpha-decay; Radiation effects
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000632521900001
来源期刊	GEOCHIMICA ET COSMOCHIMICA ACTA
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260539
推荐引用方式 GB/T 7714	Li, Weixing,Cheng, Yuanyuan,Feng, Lei,et al. Alpha-decay induced shortening of fission tracks simulated by in situ ion irradiation[J]. 中国科学院青藏高原研究所,2021,299.
APA	Li, Weixing.,Cheng, Yuanyuan.,Feng, Lei.,Niu, Jingjing.,Liu, Yingxin.,...&Ewing, Rodney C..(2021).Alpha-decay induced shortening of fission tracks simulated by in situ ion irradiation.GEOCHIMICA ET COSMOCHIMICA ACTA,299.
MLA	Li, Weixing,et al."Alpha-decay induced shortening of fission tracks simulated by in situ ion irradiation".GEOCHIMICA ET COSMOCHIMICA ACTA 299(2021).