Publication:
Excitation of the low-energy Th-229m isomer Th in the electron bridge process via the continuum

Дата
2019
Авторы
Taichenachev, A. V.
Tolstikhina, I. Yu.
Yudin, V. I.
Borisyuk, P. V.
Kolachevsky, N. N.
Tkalya, E. V.
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Научные группы
Организационные подразделения
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Институт лазерных и плазменных технологий
Стратегическая цель Института ЛаПлаз – стать ведущей научной школой и ядром развития инноваций по лазерным, плазменным, радиационным и ускорительным технологиям, с уникальными образовательными программами, востребованными на российском и мировом рынке образовательных услуг.
Выпуск журнала
Аннотация
The paper studies the excitation of the Th-229 nucleus to the anomalously low-lying isomeric state 3/2(+)(8.28 +/- 0.17 eV) in the electron bridge process via the continuum of the electron spectrum. Resonant excitation of the nucleus was found to be always possible in the scheme, no matter where the electron levels of an atom or ion were located. Formulas for the excitation cross section by narrow and wide laser lines are obtained. In the resonance, where the process under consideration turns into laser photoionization followed by nuclear excitation in electron capture, the cross section of the process was shown to be comparable in magnitude with that of the photoionization of the thorium atom. Experimental schemes for testing the effect were proposed, which would allow measuring the frequency of the nuclear isomeric transition 3/2(+) -> 5/2(+) to a high precision, which is the first-priority (and still unresolved) task for creating a nuclear clock.
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Excitation of the low-energy Th-229m isomer Th in the electron bridge process via the continuum / Taichenachev, A, V [et al.] // Physical Review C. - 2019. - 100. - № 4. - 10.1103/PhysRevC.100.044306
URI
https://www.doi.org/10.1103/PhysRevC.100.044306
 https://www.scopus.com/record/display.uri?eid=2-s2.0-85073829202&origin=resultslist
 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000489577600002
 https://openrepository.mephi.ru/handle/123456789/18756
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