Spectroscopy of high Rydberg states of highly charged ions and antiprotonic helium atoms
نویسندگان
چکیده
Hiroyuki A. Torii,∗1 Y. Morishita,∗2 Y. Yamazaki,∗1,∗2 K. Komaki,∗1 K. Kuroki,∗1 R. Hutton,∗3 K. Ishii,∗4 K. Ando,∗2 H. Masuda,∗5 M. Sekiguchi,∗6 M. Hori,∗7 E. Widmann,∗7 and R. S. Hayano∗7 ∗1 Institute of Physics, University of Tokyo, Komaba Campus ∗2 Atomic Physics Laboratory, RIKEN ∗3 Department of Physics, University of Lund, Sweden ∗4 Department of Engineering Science, Kyoto University ∗5 Department of Industrial Chemistry, Tokyo Metropolitan University ∗6 Center for Nuclear Study, University of Tokyo, RIKEN Campus ∗7 Department of Physics, University of Tokyo, Hongo Campus
منابع مشابه
Ultrafast probing of ejection dynamics of Rydberg atoms and molecular fragments from electronically excited helium nanodroplets.
The ejection dynamics of Rydberg atoms and molecular fragments from electronically excited helium nanodroplets are studied with time-resolved extreme ultraviolet ion imaging spectroscopy. At excitation energies of 23.6 ± 0.2 eV, Rydberg atoms in n = 3 and n = 4 states are ejected on different time scales and with significantly different kinetic energy distributions. Specifically, n = 3 Rydberg ...
متن کاملObservation of cold, long-lived antiprotonic helium ions.
Cold, two-body antiprotonic helium ions p 4He2+ and p 3He2+ with 100-ns-scale lifetimes, occupying circular states with the quantum numbers ni=28-32 and li=ni-1 have been observed. They were produced by cooling three-body antiprotonic helium atoms in an ultra-low-density helium target at temperature T approximately 10 K by atomic collisions, and then removing their electrons by inducing a laser...
متن کاملPrecision spectroscopy of antiprotonic atoms
Precision spectroscopy of antiprotonic atoms will be an important subject to be pursued at the new antiprotonic decelerator (AD) facility being completed at CERN. In particular, the study of antiprotonic helium atoms, peÿHe2 pHe, ®rst discovered at KEK and studied in detail at low-energy antiproton ring (LEAR), will continue to be one of the most important subjects at AD. Our recent high-reso...
متن کاملThe electronically excited states of helium clusters: an unusual example for the presence of Rydberg states in condensed matter
The nature of the electronically excited states of He clusters and their relaxation mechanisms are investigated by spectroscopy using monochromatized synchrotron radiation. Time correlated fluorescence excitation and energy resolved luminescence spectra of the clusters are recorded in separate wavelength ranges. The size of the clusters and the isotopic constitution is also varied. The spectral...
متن کاملNear-infrared laser spectroscopy of antiprotonic helium atoms
The ASACUSA (Atomic Spectroscopy and Collisions Using Slow Antiprotons) collaboration is currently attempting to observe a laser-induced resonant transition of antiprotonic helium atoms at wavelength of 1154.9 nm. Motivations to observe this transition and a nanosecond near-infrared laser prepared for this work are presented.
متن کامل