Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Excitation of the low-energy Th 229m isomer in the electron bridge process via the continuum. / Borisyuk, P. V.; Kolachevsky, N. N.; Taichenachev, A. V. и др.
в: Physical Review C, Том 100, № 4, 044306, 10.10.2019.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Excitation of the low-energy Th 229m isomer in the electron bridge process via the continuum
AU - Borisyuk, P. V.
AU - Kolachevsky, N. N.
AU - Taichenachev, A. V.
AU - Tkalya, E. V.
AU - Tolstikhina, I. Yu
AU - Yudin, V. I.
PY - 2019/10/10
Y1 - 2019/10/10
N2 - The paper studies the excitation of the Th229 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.
AB - The paper studies the excitation of the Th229 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.
KW - ALPHA-DECAY
KW - EXCITED-STATE
KW - LASER-RADIATION
KW - LEVEL
KW - LOW-LYING ISOMER
KW - NUCLEAR-EXCITATION
KW - RESONANT EXCITATION
KW - SEPARATION
KW - TRANSITION
UR - http://www.scopus.com/inward/record.url?scp=85073829202&partnerID=8YFLogxK
U2 - 10.1103/PhysRevC.100.044306
DO - 10.1103/PhysRevC.100.044306
M3 - Article
AN - SCOPUS:85073829202
VL - 100
JO - Physical Review C
JF - Physical Review C
SN - 2469-9985
IS - 4
M1 - 044306
ER -
ID: 21992861