Zobrazeno 1 - 10
of 607
pro vyhledávání: '"Sikorsky A."'
Autor:
Higgins, Jacob S., Ooi, Tian, Doyle, Jack F., Zhang, Chuankun, Ye, Jun, Beeks, Kjeld, Sikorsky, Tomas, Schumm, Thorsten
Quantum state-resolved spectroscopy of the low energy thorium-229 nuclear transition was recently achieved. The five allowed transitions within the electric quadrupole splitting structure were measured to the kilohertz level in a calcium fluoride hos
Externí odkaz:
http://arxiv.org/abs/2409.11590
Autor:
Beeks, Kjeld, Kazakov, Georgy A., Schaden, Fabian, Morawetz, Ira, de Col, Luca Toscani, Riebner, Thomas, Bartokos, Michael, Sikorsky, Tomas, Schumm, Thorsten, Zhang, Chuankun, Ooi, Tian, Higgins, Jacob S., Doyle, Jack F., Ye, Jun, Safronova, Marianna S.
State-resolved laser spectroscopy at the 10$^{-12}$ precision level recently reported in $arXiv$:2406.18719 determined the fractional change in nuclear quadrupole moment between the ground and isomeric state of $^{229}\rm{Th}$, $\Delta Q_0/Q_0$=1.791
Externí odkaz:
http://arxiv.org/abs/2407.17300
Autor:
Hiraki, Takahiro, Okai, Koichi, Bartokos, Michael, Beeks, Kjeld, Fujimoto, Hiroyuki, Fukunaga, Yuta, Haba, Hiromitsu, Kasamatsu, Yoshitaka, Kitao, Shinji, Leitner, Adrian, Masuda, Takahiko, Ming, Guan, Nagasawa, Nobumoto, Ogake, Ryoichiro, Pimon, Martin, Pressler, Martin, Sasao, Noboru, Schaden, Fabian, Schumm, Thorsten, Seto, Makoto, Shigekawa, Yudai, Shimizu, Koutaro, Sikorsky, Tomas, Tamasaku, Kenji, Takatori, Sayuri, Watanabe, Tsukasa, Yamaguchi, Atsushi, Yoda, Yoshitaka, Yoshimi, Akihiro, Yoshimura, Koji
Publikováno v:
Nat Commun 15, 5536 (2024)
The radioisotope Th-229 is renowned for its extraordinarily low-energy, long-lived nuclear first-excited state. This isomeric state can be excited by VUV lasers and the transition from the ground state has been proposed as a reference transition for
Externí odkaz:
http://arxiv.org/abs/2405.09577
Autor:
Beeks, Kjeld, Sikorsky, Tomas, Schaden, Fabian, Pressler, Martin, Schneider, Felix, Koch, Björn N., Pronebner, Thomas, Werban, David, Hosseini, Niyusha, Kazakov, Georgy, Welch, Jan, Sterba, Johannes H., Kraus, Florian, Schumm, Thorsten
The 8 eV first nuclear excited state in $^{229}$Th is a candidate for implementing an nuclear clock. Doping $^{229}$Th into ionic crystals such as CaF$_2$ is expected to suppress non-radiative decay, enabling nuclear spectroscopy and the realization
Externí odkaz:
http://arxiv.org/abs/2312.13713
We present a new approach to Nuclear Quadrupole Resonance (NQR)/Nuclear Magnetic Resonance (NMR) spectroscopy, the Damp-Enhanced Superregenerative Nuclear Spin Analyser (DESSA). This system integrates Superregenerative principles with pulsed sample e
Externí odkaz:
http://arxiv.org/abs/2312.08491
Autor:
Takahiro Hiraki, Koichi Okai, Michael Bartokos, Kjeld Beeks, Hiroyuki Fujimoto, Yuta Fukunaga, Hiromitsu Haba, Yoshitaka Kasamatsu, Shinji Kitao, Adrian Leitner, Takahiko Masuda, Ming Guan, Nobumoto Nagasawa, Ryoichiro Ogake, Martin Pimon, Martin Pressler, Noboru Sasao, Fabian Schaden, Thorsten Schumm, Makoto Seto, Yudai Shigekawa, Kotaro Shimizu, Tomas Sikorsky, Kenji Tamasaku, Sayuri Takatori, Tsukasa Watanabe, Atsushi Yamaguchi, Yoshitaka Yoda, Akihiro Yoshimi, Koji Yoshimura
Publikováno v:
Nature Communications, Vol 15, Iss 1, Pp 1-10 (2024)
Abstract The radioisotope thorium-229 (229Th) is renowned for its extraordinarily low-energy, long-lived nuclear first-excited state. This isomeric state can be excited by vacuum ultraviolet (VUV) lasers and 229Th has been proposed as a reference tra
Externí odkaz:
https://doaj.org/article/16a44354d3d94916bf8e46d4a3ff9a73
Autor:
Beeks, Kjeld, Sikorsky, Tomas, Rosecker, Veronika, Pressler, Martin, Schaden, Fabian, Werban, David, Hosseini, Niyusha, Rudischer, Lukas, Schneider, Felix, Berwian, Patrick, Friedrich, Jochen, Hainz, Dieter, Welch, Jan, Sterba, Johannes H., Kazakov, Georgy, Schumm, Thorsten
We have grown $^{232}$Th:CaF$_2$ and $^{229}$Th:CaF$_2$ single crystals for investigations on the VUV laser-accessible first nuclear excited state of $^{229}$Th. To reach high doping concentrations despite the extreme scarcity (and radioactivity) of
Externí odkaz:
http://arxiv.org/abs/2211.05445
Publikováno v:
In Nuclear Inst. and Methods in Physics Research, A May 2024 1062
Autor:
Nickerson, Brenden S., Pimon, Martin, Bilous, Pavlo V., Gugler, Johannes, Kazakov, Georgy A., Sikorsky, Tomas, Beeks, Kjeld, Gruneis, Andreas, Schumm, Thorsten, Palffy, Adriana
Publikováno v:
Phys. Rev. A 103, 053120 (2021)
The electronic defect states resulting from doping $^{229}$Th in CaF$_2$ offer a unique opportunity to excite the nuclear isomeric state $^{229m}$Th at approximately 8 eV via electronic bridge mechanisms. We consider bridge schemes involving stimulat
Externí odkaz:
http://arxiv.org/abs/2103.10789
Autor:
Ben-shlomi, Ruti, Pinkas, Meirav, Meir, Ziv, Sikorsky, Tomas, Katz, Or, Akerman, Nitzan, Ozeri, Roee
Publikováno v:
Phys. Rev. A 103, 032805 (2021)
The cross section of a given process fundamentally quantifies the probability for that given process to occur. In the quantum regime of low energies, the cross section can vary strongly with collision energy due to quantum effects. Here, we report on
Externí odkaz:
http://arxiv.org/abs/2009.03180