Publication:
Internal conversion of the low-energy (229m)qh isomer in the thorium anion

Дата
2020
Авторы
Tkalya, E. V.
Si, R.
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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.
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Аннотация
A process of the decay of the anomalously low-lying nuclear isomer Th-229m(3/2(+), 8.28 +/- 0.17 eV) in the thorium anion (Th ) via the internal conversion (IC) channel is studied. We show that the half-life of the nuclear isomer in the 6d(3/2)(3)7s(1/2)(2) ground state and in the 6d(3/2)(3)7s(1/2)(2)7p(1/2)(1) excited state of Th- is approximate to 1.5 and approximate to 1.1 times bigger than in the 6d(3/2)(2)7s(1/2)(2) ground state of the Th atom. The IC probabilities in the anion decreases despite the decay via the additional 6d(3/2) or 7P(1/2) electrons. This counterintuitive result is a consequence (a) of a decrease in the amplitudes of the 6d(3/2) and 7s(1/2) wave functions near the nucleus due to an increase in their diffuseness of upon the addition of extra electron and (b) of mutual compensation in the IC probability due to a kinematic factor, which depends on the energy of the conversion electron in the continuum as E-c(-1/2), and the E-c(1/4) growth of the amplitudes of the electron wave functions.
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Цитирование
Tkalya, E. V. Internal conversion of the low-energy (229m)qh isomer in the thorium anion / Tkalya, EV, Si, R // Physical Review C. - 2020. - 101. - № 5. - 10.1103/PhysRevC.101.054602
URI
https://www.doi.org/10.1103/PhysRevC.101.054602
 https://www.scopus.com/record/display.uri?eid=2-s2.0-85085971228&origin=resultslist
 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000530632800003
 https://openrepository.mephi.ru/handle/123456789/21661
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