Zobrazeno 1 - 10
of 43
pro vyhledávání: '"Georgy A. Kazakov"'
Publikováno v:
2021 Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium (EFTF/IFCS).
Active optical atomic clocks operating on narrow linewidth clock transitions based on a superradiant lasing are predicted to achieve precision orders of magnitude higher than any currently existing optical atomic clocks. We introduce a general theory
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4e3fe182a765fd263d3666afc535adc5
https://doi.org/10.1109/eftf/ifcs52194.2021.9604307
https://doi.org/10.1109/eftf/ifcs52194.2021.9604307
Autor:
Tomas Sikorsky, Thorsten Schumm, Andreas Grüneis, Johannes Gugler, Adriana Pálffy, Georgy A. Kazakov, Brenden Scott Nickerson, Pavlo V. Bilous, Martin Pimon, Kjeld Beeks
Publikováno v:
Physical Review A
The electronic defect states resulting from doping $^{229}\mathrm{Th}$ in ${\mathrm{CaF}}_{2}$ offer a unique opportunity to excite the nuclear isomeric state $^{229\mathrm{m}}\mathrm{Th}$ at approximately 8 eV via electronic bridge mechanisms. We co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c3d9626f7b9fe8af45a4bc31068c5306
https://hdl.handle.net/21.11116/0000-0008-9D8A-C21.11116/0000-0008-9D8C-A
https://hdl.handle.net/21.11116/0000-0008-9D8A-C21.11116/0000-0008-9D8C-A
Autor:
S Dubey, Shayne Bennetts, Florian Schreck, Stefan A. Schäffer, Sheng Zhou, Georgy A. Kazakov, C Beli Silva, Francesca Fama
Publikováno v:
IEEE EFTF-IFCS 2021: 2021 Joint Conference of the European Frequency and Time Forum & the IEEE International Frequency Control Symposium : July 7-17, 2021, virtual conference : 2021 symposium proceedings, 290-294
STARTPAGE=290;ENDPAGE=294;TITLE=IEEE EFTF-IFCS 2021
STARTPAGE=290;ENDPAGE=294;TITLE=IEEE EFTF-IFCS 2021
We report on our progress towards a continuously-operating active optical clock on the 3 P 0 → 1 S 0 transition of neutral 87 Sr or 88 Sr atoms. Our approach is based on a ring-cavity in which an optical conveyor carries a continuous stream of atom
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::db6552e7bbe80a7b62ed02c67dfcbcec
https://dare.uva.nl/personal/pure/en/publications/towards-an-active-optical-clock-using-an-optical-conveyor-within-a-ring-cavity(8636c28b-df53-45d5-9adf-efae583ad55b).html
https://dare.uva.nl/personal/pure/en/publications/towards-an-active-optical-clock-using-an-optical-conveyor-within-a-ring-cavity(8636c28b-df53-45d5-9adf-efae583ad55b).html
Autor:
Andreas Fleischmann, Christoph E. Düllmann, C. Mokry, Christian Enss, Georgy A. Kazakov, Jörg Runke, Sebastian Kempf, Peter Wobrauschek, Thorsten Schumm, Veronika Rosecker, Tomas Sikorsky, Jeschua Geist, D. Hengstler, Johannes H. Sterba, Loredana Gastaldo, Kjeld Beeks
Publikováno v:
Physical Review Letters. 125
We present a measurement of the low-energy (0-60 keV) γ-ray spectrum produced in the α decay of ^{233}U using a dedicated cryogenic magnetic microcalorimeter. The energy resolution of ∼10 eV, together with exceptional gain linearity, allows us to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::23caaea6ed908afec291b0de30e6fcdc
https://doi.org/10.1103/physrevlett.125.142503
https://doi.org/10.1103/physrevlett.125.142503
Autor:
Lars von der Wense, Johannes Weitenberg, Adriana Pálffy, Pavlo V. Bilous, Peter G. Thirolf, Simon Stellmer, Georgy A. Kazakov, Benedict Seiferle
Publikováno v:
European Physical Journal A
The European Physical Journal A
The European Physical Journal A: Hadrons and Nuclei
The European Physical Journal A
The European Physical Journal A: Hadrons and Nuclei
A comprehensive theoretical study of direct laser excitation of a nuclear state based on the density matrix formalism is presented. The nuclear clock isomer $$^{229\text {m}}$$ Th is discussed in detail, as it could allow for direct laser excitation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a5502276001346d9e6b2df1b544102f8
https://hdl.handle.net/21.11116/0000-0006-CDCD-D21.11116/0000-0006-CDCF-B21.11116/0000-0006-CDD0-8
https://hdl.handle.net/21.11116/0000-0006-CDCD-D21.11116/0000-0006-CDCF-B21.11116/0000-0006-CDD0-8
Autor:
Georgy A. Kazakov, Alexander Romanenko, Ye. G. Udovitskaya, L. P. Yatsenko, V. I. Romanenko, A. N. Litvinov
Publikováno v:
Scopus-Elsevier
A possibility of the two-photon excitation of an isomeric state in a nucleus of thorium-229 has been discussed. The fluorescence intensity of the excitation is demonstrated to be identical for the irradiation of nuclei with either monochromatic light
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::19def074ce6c28b1b63bc5fefa3d469a
https://doi.org/10.15407/ujpe57.11.1119
https://doi.org/10.15407/ujpe57.11.1119
Autor:
Norbert J. Mauser, Martin Pimon, Johannes Gugler, Thorsten Schumm, Peter Mohn, Georgy A. Kazakov
Publikováno v:
Journal of Physics: Condensed Matter. 32:255503
The 229thorium nucleus has an extremely low-energy isomeric state that could be manipulated with light in the vacuum ultraviolet (VUV) range. Recent measurements based on internal conversion electrons place the isomer energy at 8.28(17) eV (Seiferle
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dbfd8f5ba1aee52c36066fcaf559dd81
https://doi.org/10.1088/1361-648x/ab7c90
https://doi.org/10.1088/1361-648x/ab7c90
Autor:
Simon Stellmer, Yoshitaka Kasamatsu, Atsushi Shinohara, Veronika Rosecker, Thorsten Schumm, Yuki Yasuda, Yudai Shigekawa, Georgy A. Kazakov
Publikováno v:
Physical Review C
The first excited isomeric state of Th-229 has an exceptionally low energy of only a few eV and could form the gateway to high-precision laser spectroscopy of nuclei. The excitation energy of the isomeric state has been inferred from precision gamma
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::65d2406972c12999bbc65ae4ac14106f
http://arxiv.org/abs/1805.04929
http://arxiv.org/abs/1805.04929
Autor:
Thorsten Schumm, Matthias Schreitl, Simon Stellmer, Michael Kolbe, Georgy A. Kazakov, H. Kaser
Publikováno v:
Physical Review A
We aim to perform direct optical spectroscopy of the Th-229 nuclear isomer to measure its energy and lifetime, and to demonstrate optical coupling to the nucleus. To this end, we develop Th-doped CaF2 crystals, which are transparent at the anticipate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::51b153e31bff45d491bbed3aac8de5d1
Autor:
Simon Stellmer, Georgy A. Kazakov, Johannes Weitenberg, Peter G. Thirolf, Adriana Pálffy, Lars von der Wense, Benedict Seiferle
Publikováno v:
Physical Review Letters
Direct laser excitation of the lowest known nuclear excited state in ^{229}Th has been a long-standing objective. It is generally assumed that reaching this goal would require a considerably reduced uncertainty of the isomer's excitation energy compa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::474db0f001ec406a070d73955b2aa100
https://doi.org/10.1103/physrevlett.119.132503
https://doi.org/10.1103/physrevlett.119.132503