Zobrazeno 1 - 10
of 1 479
pro vyhledávání: '"Ubachs, W"'
Autor:
Agafonova, I. I., Bayandina, O. S., Gong, Y., Henkel, C., Kim, Kee-Tae, Kozlov, M. G., Lankhaar, B., Levshakov, S. A., Menten, K. M., Ubachs, W., Val'tts, I. E., Yang, W.
We present results on simultaneous observations of Class~I methanol masers at 25, 36, and 44 GHz towards 22 Galactic targets carried out with the Effelsberg 100-m telescope. The study investigates relations between the hyperfine (HF) structure of the
Externí odkaz:
http://arxiv.org/abs/2407.11657
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
Publikováno v:
Physical Review Letters, Feb. (2024)
Saturated absorption measurements of transitions in the (2-0) band of radioactive tritium hydride (HT) are performed with the ultra-sensitive NICE-OHMS intracavity absorption technique in the range 1460-1510 nm. The hyperfine structure of rovibration
Externí odkaz:
http://arxiv.org/abs/2401.14716
The saturated absorption spectrum of the hyperfine-less S(0) quadrupole line in the (2-0) band of H$_2$ is measured at $\lambda=1189$ nm, using the NICE-OHMS technique under cryogenic conditions (72~K). It is for the first time that a Lamb dip of a m
Externí odkaz:
http://arxiv.org/abs/2303.17818
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
Two-photon UV-photolysis of hydrogen sulfide molecules is applied to produce hydrogen molecules in highly excited vibrational levels in the \X\ electronic ground state, up to the dissociation energy and into the quasibound region. Photolysis precurso
Externí odkaz:
http://arxiv.org/abs/2302.07021
The R(1), R(3) and P(3) ro-vibrational transitions in the (2-0) overtone band of the HD molecule are measured in Doppler-free saturation using the technique of NICE-OHMS spectroscopy. For the P(3) line, hitherto not observed in saturation, we report
Externí odkaz:
http://arxiv.org/abs/2205.13877
Autor:
Hakalla, R., Niu, M. L., Field, R. W., Heays, A. N., Salumbides, E. J., Stark, G., Lyons, J. R., Eidelsberg, M., Lemaire, J. L., Federman, S. R., de Oliveira, N., Ubachs, W.
The high-resolution B$^1\Sigma^+$ - A$^1\Pi$ (0, 0) and (0, 3) emission bands of the less-abundant $^{13}$C$^{17}$O isotopologue have been investigated by Fourier-transform spectroscopy in the visible region using a Bruker IFS 125HR spectrometer at a
Externí odkaz:
http://arxiv.org/abs/2204.11466
Autor:
Patra, Sayan, Germann, M., Karr, J. -Ph., Haidar, M., Hilico, L., Korobov, V. I., Cozijn, F. M. J., Eikema, K. S. E., Ubachs, W., Koelemeij, J. C. J.
Publikováno v:
Science 369, 1238-1241 (2020)
Accepted values of the masses of several subatomic particles have been under debate since recent measurements in Penning traps produced more precise yet incompatible results, implying possible inconsistencies in closely related physical constants lik
Externí odkaz:
http://arxiv.org/abs/2204.10674
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