兰州大学机构库
Alpha-decay induced shortening of fission tracks simulated by in situ ion irradiation
Li, Weixing1,2; Cheng, Yuanyuan1,2,3; Feng, Lei1,2,4; Niu, Jingjing1,2; Liu, Yingxin3; Skuratov, Vladimir A.5,6,7; Zdorovets, Maxim, V8,9,10; Boatner, Lynn A.11; Ewing, Rodney C.12
2021-04-15
Source PublicationGEOCHIMICA ET COSMOCHIMICA ACTA
ISSN0016-7037
Volume299Pages:1-14
AbstractThe 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.
KeywordZirconApatiteFission tracksAlpha-decayRadiation effects
PublisherPERGAMON-ELSEVIER SCIENCE LTD
DOI10.1016/j.gca.2021122
Indexed BySCOPUS ; SCIE
Language英语
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000632521900001
Original Document TypeArticle
Citation statistics
Document Type期刊论文
Identifierhttps://ir.lzu.edu.cn/handle/262010/450261
Collection兰州大学
Affiliation1.Chinese Acad Sci, Inst Tibetan Plateau Res, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China;
2.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Continental Collis & Plateau Uplift, Beijing 100101, Peoples R China;
3.China Univ Geosci, Sch Gemol, Beijing 100083, Peoples R China;
4.Lanzhou Univ, Sch Earth Sci, Lanzhou 730000, Peoples R China;
5.Joint Inst Nucl Res, Flerov Lab Nucl React, Dubna, Russia;
6.Natl Res Nucl Univ MEPhI, Moscow, Russia;
7.Dubna State Univ, Dubna, Moscow Region, Russia;
8.Inst Nucl Phys Republ Kazakhstan, Nur Sultan, Kazakhstan;
9.LN Gumilyov Eurasian Natl Univ, Nur Sultan, Kazakhstan;
10.Ural Fed Univ, Ekaterinburg, Russia;
11.Oak Ridge Natl Lab, Mat Sci & Technol Div, POB 2008, Oak Ridge, TN 37831 USA;
12.Stanford Univ, Dept Geol Sci, Stanford, CA 94305 USA
Recommended Citation
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]. GEOCHIMICA ET COSMOCHIMICA ACTA,2021,299:1-14.
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,299,1-14.
MLA Li, Weixing,et al."Alpha-decay induced shortening of fission tracks simulated by in situ ion irradiation".GEOCHIMICA ET COSMOCHIMICA ACTA 299(2021):1-14.
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