Zobrazeno 1 - 10
of 45
pro vyhledávání: '"Dijck, E. A."'
There is a growing interest in high-precision spectroscopy and frequency metrology for fundamental studies using sympathetically cooled highly charged ions (HCIs) embedded in Coulomb crystals of laser-cooled ions. In order to understand how their str
Externí odkaz:
http://arxiv.org/abs/2408.05049
Autor:
Stark, J., Warnecke, C., Bogen, S., Chen, S., Dijck, E. A., Kühn, S., Rosner, M. K., Graf, A., Nauta, J., Oelmann, J. -H., Schmöger, L., Schwarz, M., Liebert, D., Spieß, L. J., King, S. A., Leopold, T., Micke, P., Schmidt, P. O., Pfeifer, T., López-Urrutia, J. R. Crespo
We present a novel ultrastable superconducting radio-frequency (RF) ion trap realized as a combination of an RF cavity and a linear Paul trap. Its RF quadrupole mode at 34.52 MHz reaches a quality factor of $Q\approx2.3\times 10^5$ at a temperature o
Externí odkaz:
http://arxiv.org/abs/2102.02793
Autor:
Sytema, A., Berg, J. E. van den, Böll, O., Chernowitz, D., Dijck, E. A., Grasdijk, J. O., Hoekstra, S., Jungmann, K., Mathavan, S. C., Meinema, C., Mohanty, A., Müller, S. E., Noordmans, J. P., Portela, M. Nuñez, Onderwater, C. J. G., Pijpker, C., Timmermans, R. G. E., Vos, K. K., Willmann, L., Wilschut, H. W.
Publikováno v:
Phys. Rev. C 94, 025503 (2016)
We search for a dependence of the lifetime of $^{20}\text{Na}$ nuclei on the nuclear spin direction. Such a directional dependence would be evidence for Lorentz-invariance violation in weak interactions. A difference in lifetime between nuclei that a
Externí odkaz:
http://arxiv.org/abs/1608.03870
Autor:
Sytema, A., Berg, J. E. van den, Böll, O., Chernowitz, D., Dijck, E. A., Grasdijk, J. O., Hoekstra, S., Jungmann, K., Mathavan, S. C., Meinema, C., Mohanty, A., Müller, S. E., Portela, M. Nuñez, Onderwater, C. J. G., Pijpker, C., Willmann, L., Wilschut, H. W.
Publikováno v:
Nucl. Instrum. Methods Phys. Res. A 822 (2016) 77
A radioactive beam of 20Na is stopped in a gas cell filled with Ne gas. The stopped particles are polarized by optical pumping. The degree of polarization that can be achieved is studied. A maximum polarization of 50% was found. The dynamic processes
Externí odkaz:
http://arxiv.org/abs/1601.03599
Autor:
Refsgaard, J., Kirsebom, O. S., Dijck, E. A., Fynbo, H. O. U., Lund, M. V., Portela, M. N., Raabe, R., Randisi, G., Renzi, F., Sambi, S., Sytema, A., Willmann, L., Wilschut, H. W.
While the 12C(a,g)16O reaction plays a central role in nuclear astrophysics, the cross section at energies relevant to hydrostatic helium burning is too small to be directly measured in the laboratory. The beta-delayed alpha spectrum of 16N can be us
Externí odkaz:
http://arxiv.org/abs/1506.09020
Autor:
Dijck, E. A., Portela, M. Nuñez, Grier, A. T., Jungmann, K., Mohanty, A., Valappol, N., Willmann, L.
Publikováno v:
Phys. Rev. A 91, 060501(R) (2015)
Transition frequencies between low-lying energy levels in a single trapped $^{138}$Ba$^{+}$ ion have been measured with laser spectroscopy referenced to an optical frequency comb. By extracting the frequencies of one-photon and two-photon components
Externí odkaz:
http://arxiv.org/abs/1504.01285
Autor:
Pinkert, T. J., Böll, O., Jansen, G. S. M., Dijck, E. A., Groeneveld, B. G. H. M., Smets, R., Bosveld, F. C., Ubachs, W., Jungmann, K., Eikema, K. S. E., Koelemeij, J. C. J.
Publikováno v:
Applied Optics, Vol. 54, Issue 4, pp. 728-738 (2015)
Results of optical frequency transfer over a carrier-grade dense-wavelength-division-multiplexing (DWDM) optical fibre network are presented. The relation between soil temperature changes on a buried optical fibre and frequency changes of an optical
Externí odkaz:
http://arxiv.org/abs/1410.4600
Autor:
Müller, S. E., Dijck, E. A., Bekker, H., Berg, J. E. van den, Böll, O., Hoekstra, S., Jungmann, K., Meinema, C., Noordmans, J. P., Portela, M. Nuñez, Onderwater, C. J. G., Pijpker, C., van der Poel, A. P. P., Santra, B., Sytema, A., Timmermans, R. G. E., Versolato, O. O., Willmann, L., Wilschut, H. W., Yai, K.
Publikováno v:
Phys. Rev. D 88, 071901 (2013)
A new test of Lorentz invariance in the weak interactions has been made by searching for variations in the decay rate of spin-polarized 20Na nuclei. This test is unique to Gamow-Teller transitions, as was shown in the framework of a recently develope
Externí odkaz:
http://arxiv.org/abs/1310.3206
Autor:
Wilschut, H. W., Dijck, E. A., Hoekstra, S., Jungmann, K., Müller, S. E., Noordmans, J. P., Onderwater, C. J. G., Pijpker, C., Sytema, A., Timmermans, R. G. E., Vos, K. K., Willmann, L.
Publikováno v:
Ann. Phys. (Berlin) 525, 653 (2013)
Lorentz invariance in the weak interaction has been tested rather poorly compared to the electromagnetic interaction. In this work we show which tests on the weak interaction should be considered. We focus on one particular test that explores the spi
Externí odkaz:
http://arxiv.org/abs/1303.6419
Autor:
Nuñez Portela, M.1, Dijck, E.1, Mohanty, A.1, Bekker, H.2, Berg, J.1, Giri, G.3 g.s.giri@sussex.ac.uk, Hoekstra, S.1, Onderwater, C.1, Schlesser, S.1, Timmermans, R.1, Versolato, O.2 oscar.versolato@mpi-hd.mpg.de, Willmann, L.1, Wilschut, H.1, Jungmann, K.1 k.h.k.j.jungmann@rug.nl
Publikováno v:
Applied Physics B: Lasers & Optics. Jan2014, Vol. 114 Issue 1/2, p173-182. 10p. 4 Diagrams, 5 Charts, 5 Graphs.