Publication:
Alpha-decay induced shortening of fission tracks simulated by in situ ion irradiation

Файлы
W3128381304.pdf(2.99 MB)
Дата
2021
Авторы
Li, W.
Cheng, Y.
Feng, L.
Niu, J.
Skuratov, V. A.
Journal Title
Journal ISSN
Volume Title
Издатель
Научные группы
Организационные подразделения
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Организационная единица
Институт ядерной физики и технологий
Цель ИЯФиТ и стратегия развития - создание и развитие научно-образовательного центра мирового уровня в области ядерной физики и технологий, радиационного материаловедения, физики элементарных частиц, астрофизики и космофизики.
Выпуск журнала
Аннотация
© 2021 Elsevier LtdThe 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 238U, 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 238U and 232Th. 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.
Описание
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Цитирование
Alpha-decay induced shortening of fission tracks simulated by in situ ion irradiation / Li, W. [et al.] // Geochimica et Cosmochimica Acta. - 2021. - 299. - P. 1-14. - 10.1016/j.gca.2021.01.022
URI
https://www.doi.org/10.1016/j.gca.2021.01.022
 https://www.scopus.com/record/display.uri?eid=2-s2.0-85101653102&origin=resultslist
 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000632521900001
 https://openrepository.mephi.ru/handle/123456789/23724
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