Features of coherent excitation of 229mThстатья
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Дата последнего поиска статьи во внешних источниках: 25 мая 2022 г.
Автор:
Tkalya E.V.
Журнал:
Nuclear Physics A
Том:
1022
Год издания:
2022
Издательство:
Elsevier BV
Местоположение издательства:
Netherlands
Номер статьи:
122428
DOI:
10.1016/j.nuclphysa.2022.122428
Аннотация:
The paper studies the effects that arise at the coherent excitation of the anomalously low-lying isomeric level 3/2+(8.19 ±0.12eV) in the 229Th nucleus driven by laser radiation in wide band gap dielectrics. It is shown that in such an excitation a) the appearance of additional decay channels with a width of the 229mTh isomer due to electron states in the band gap leads to an effective “freezing” of the system in the ground state (the repopulation process at relatively small and the Zeno effect at large ), making the process of nuclear excitation practically impossible, b) the probability of the αdecay of a coherent superposition of the ground and isomeric states becomes equal to the half-sum of the αwidths of both levels and is increased by about a factor of two in comparison with the probability of the αdecay of 229Th, c) the intensity of the main αlines oscillates with the Rabi frequency and the total αspectrum shifts towards higher energies for long time measurements, d) the inverse population of nuclear levels required for the Thorium γray laser is achieved relatively quickly within the πpulse duration, e) the observation of the Zeno effect according to the Cook’s scheme is possible for the system of three lower levels of the 229Th nucleus.
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Добавил в систему:
Ткаля Евгений Викторович