Zobrazeno 1 - 10
of 64
pro vyhledávání: '"Bethlem, H. L."'
Autor:
Mooij, M C, Bethlem, H L, Boeschoten, A, Borschevsky, A, Esajas, K, Fikkers, T H, Hoekstra, S, van Hofslot, J W F, Jungmann, K, Marshall, V R, Meijknecht, T B, Timmermans, R G E, Touwen, A, Ubachs, W, Willmann, L, Yin., Y
Recently, we have demonstrated a method to record the longitudinal phase-space distribution of a pulsed cryogenic buffer gas cooled beam of barium fluoride molecules. In this paper, we use this method to determine the influence of various source para
Externí odkaz:
http://arxiv.org/abs/2401.16590
Accurate spectroscopic measurements of calculable systems provide a powerful method for testing the Standard Model and extracting fundamental constants. Recently, spectroscopic measurements of finite nuclear size effects in normal and muonic hydrogen
Externí odkaz:
http://arxiv.org/abs/2306.02333
Autor:
Boeschoten, A., Marshall, V. R., Meijknecht, T. B., Touwen, A., Bethlem, H. L., Borschevsky, A., Hoekstra, S., van Hofslot, J. W. F., Jungmann, K., Mooij, M. C., Timmermans, R. G. E., Ubachs, W., Willmann, L.
We demonstrate a spin-precession method to observe and analyze multi-level coherence between all hyperfine levels in the $X ^2\Sigma^+,N=0$ ground state of barium monofluoride ($^{138}$Ba$^{19}$F). The signal is sensitive to the state-preparation Rab
Externí odkaz:
http://arxiv.org/abs/2303.06402
Autor:
Hussels, J., Hölsch, N., Cheng, C. -F., Salumbides, E. J., Bethlem, H. L., Eikema, K. S. E., Jungen, Ch., Beyer, M., Merkt, F., Ubachs, W.
The ionization energy of D$_2$ has been determined experimentally from measurements involving two-photon Doppler-free vacuum-ultraviolet pulsed laser excitation and near-infrared continuous-wave laser excitation to yield $E_\mathrm{I}(\mathrm{D}_2)=1
Externí odkaz:
http://arxiv.org/abs/2202.00532
Autor:
collaboration, NL-eEDM, Aggarwal, P., Yin, Y., Esajas, K., Bethlem, H. L., Boeschoten, A., Borschevsky, A., Hoekstra, S., Jungmann, K., Marshall, V. R., Meijknecht, T. B., Mooij, M. C., Timmermans, R. G. E., Touwen, A., Ubachs, W., Willmann, L.
Publikováno v:
Phys. Rev. Lett. 127, 173201 (2021)
We report on the electrostatic trapping of neutral SrF molecules. The molecules are captured from a cryogenic buffer-gas beam source into the moving traps of a 4.5 m long traveling-wave Stark decelerator. The SrF molecules in $X^2\Sigma^+(v=0, N=1)$
Externí odkaz:
http://arxiv.org/abs/2103.07968
Autor:
Aggarwal, P., Marshall, V. R., Bethlem, H. L., Boeschoten, A., Borschevsky, A., Denis, M., Esajas, K., Hao, Y., Hoekstra, S., Jungmann, K., Meijknecht, T. B., Mooij, M. C., Timmermans, R. G. E., Touwen, A., Ubachs, W., Vermeulen, S. M., Willmann, L., Yin, Y., Zapara, A.
Publikováno v:
Phys. Rev. A 100, 052503 (2019)
Time resolved detection of laser induced fluorescence from pulsed excitation of electronic states in barium monofluoride (BaF) molecules has been performed in order to determine the lifetimes of the $A^2\Pi_{1/2}$ and $A^2\Pi_{3/2}$ states. The metho
Externí odkaz:
http://arxiv.org/abs/1907.06879
Akademický článek
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Akademický článek
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Autor:
Cheng, C., Hussels, J., Niu, M., Bethlem, H. L., Eikema, K. S. E., Salumbides, E. J., Ubachs, W., Beyer, M., Hölsch, N. J., Agner, J. A., Merkt, F., Tao, L. -G., Hu, S. -M., Jungen, Ch.
Publikováno v:
Phys. Rev. Lett. 121, 013001 (2018)
The ionization energy of ortho-H$_2$ has been determined to be $E^\mathrm{o}_\mathrm{I}(\mathrm{H}_2)/(hc)=124\,357.238\,062(25)$ cm$^{-1}$ from measurements of the GK(1,1)--X(0,1) interval by Doppler-free two-photon spectroscopy using a narrow band
Externí odkaz:
http://arxiv.org/abs/1804.11143
Autor:
Daprà, M., Henkel, C., Levshakov, S. A., Menten, K. M., Muller, S., Bethlem, H. L., Leurini, S., Lapinov, A. V., Ubachs, W.
The dependence of the proton-to-electron mass ratio, mu, on the local matter density was investigated using methanol emission in the dense dark cloud core L1498. Towards two different positions in L1498, five methanol transitions were detected and an
Externí odkaz:
http://arxiv.org/abs/1709.03103