气候变化领域集成服务门户(CCPortal): In situ TEM observation of alpha-particle induced annealing of radiation damage in Durango apatite

CCPortal

DOI	10.1038/s41598-017-14379-9
	In situ TEM observation of alpha-particle induced annealing of radiation damage in Durango apatite
	Li, Weixing; Shen, Yahui; Zhou, Yueqing; Nan, Shuai; Chen, Chien-Hung; Ewing, Rodney C.
通讯作者	Li, WX (通讯作者)
发表日期	2017
ISSN	2045-2322
卷号	7
英文摘要	A major issue in thermochronology and U-Th-Pb dating is the effect of radiation damage, created by a-recoils from alpha-decay events, on the diffusion of radiogenic elements (e.g., He and Pb) in host mineral. Up until now, thermal events have been considered as the only source of energy for the recovery of radiation-damage. However, irradiation, such as from the alpha-particle of the a-decay event, can itself induce damage recovery. Quantification of radiation-induced recovery caused by alpha-particles during alpha-decay events has not been possible, as the recovery process at the atomic-scale has been difficult to observe. Here we present details of the dynamics of the amorphous-to-crystalline transition process during a-particle irradiations using in situ transmission electron microscopy (TEM) and consecutive ion-irradiations: 1 MeV Kr2+ (simulating alpha-recoil damage), followed by 400 keV He+ (simulating a-particle annealing). Upon the He+ irradiation, partial recrystallization of the original, fully-amorphous Durango apatite was clearly evident and quantified based on the gradual appearance of new crystalline domains in TEM images and new diffraction maxima in selected area electron diffraction patterns. Thus, alpha-particle induced annealing occurs and must be considered in models of alpha-decay event damage and its effect on the diffusion of radiogenic elements in geochronology and thermochronology.
关键词	HELIUM DIFFUSION KINETICS ION IRRADIATION INDUCED AMORPHIZATION BEAM IRRADIATION NUCLEAR-WASTE ZIRCON CRYSTALLINE DECAY MINERALS EARTH
语种	英语
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000413816000038
来源期刊	SCIENTIFIC REPORTS
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/258918
推荐引用方式 GB/T 7714	Li, Weixing,Shen, Yahui,Zhou, Yueqing,et al. In situ TEM observation of alpha-particle induced annealing of radiation damage in Durango apatite[J]. 中国科学院青藏高原研究所,2017,7.
APA	Li, Weixing,Shen, Yahui,Zhou, Yueqing,Nan, Shuai,Chen, Chien-Hung,&Ewing, Rodney C..(2017).In situ TEM observation of alpha-particle induced annealing of radiation damage in Durango apatite.SCIENTIFIC REPORTS,7.
MLA	Li, Weixing,et al."In situ TEM observation of alpha-particle induced annealing of radiation damage in Durango apatite".SCIENTIFIC REPORTS 7(2017).