Collisional Perturbation of States in Atomic Ytterbium by Helium and
نویسندگان
چکیده
Collisional Perturbation of States in Atomic Ytterbium by Helium and Neon D.F. Kimball, D. Clyde, D. Budker, D. DeMille, S.J. Freedman, S. Rochester, J.E. Stalnaker, and M. Zolotorev a Physics Department, University of California, Berkeley, CA 94720-7300 b Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 c Physics Department, Yale University, New Haven, CT 06520 d Center for Beam Physics, Lawrence Berkeley National Laboratory, Berkeley, CA 94720
منابع مشابه
Collisional Plasma Models with Apec/aped: Emission Line Diagnostics of Hydrogen-like and Helium-like Ions
New X-ray observatories (Chandra and XMM-Newton) are providing a wealth of high-resolution X-ray spectra in which hydrogenand helium-like ions are usually strong features. We present results from a new collisional-radiative plasma code, the Astrophysical Plasma Emission Code (apec), which uses atomic data in the companion Astrophysical Plasma Emission Database (aped) to calculate spectral model...
متن کاملImproving Predictions for Helium Emission Lines
We have combined the detailed He I recombination model of Smits with the collisional transitions of Sawey & Berrington in order to produce new accurate helium emissivities that include the effects of collisional excitation from both the 2S and 2S levels. We present a grid of emissivities for a range of temperature and densities along with analytical fits and error estimates. These grids elimina...
متن کاملFrequency shifts of photoassociative spectra of ultracold metastable Helium atoms : a new measurement of the s-wave scattering length
– We observe light-induced frequency shifts in one-color photoassociative spectra of magnetically trapped He atoms in the metastable 2S1 state. A pair of ultracold spinpolarized 2S1 helium atoms is excited into a molecular bound state in the purely long range 0+u potential connected to the 2 S1−2 P0 asymptote. The shift arises from the optical coupling of the molecular excited bound state with ...
متن کاملSpin-dependent collision of ultracold metastable atoms
Spin-polarizedmetastable atoms of ultracold ytterbium are trapped at high density and their inelastic collisional properties are measured. We reveal that in collisions of Yb(P2) with Yb(S0) there is relatively weak inelastic loss, but with a significant spin dependence consistent with Zeeman sublevel changes as being the dominant decay process. This is in strong contrast to our observations of ...
متن کاملCore Atomic Physics Studies in Alcator C-mod Core Atomic Physics Studies in Alcator C-mod
The Rydberg series (1s – 1snp) up to n=14 of helium-like argon (Z=18) has been observed from Alcator C-Mod plasmas using a high resolution x-ray spectrometer array. High n satellites to these lines of the form 1s2s – 1s2snp and 1s2p – 1s2pnp with 3 ≤ n ≤ 12 have been recorded. X-ray spectra of 2l nl′ transitions with 3 ≤ n ≤ 18 in molybdenum (Z=42) and 3 ≤ n ≤ 12 in krypton (Z=36) and niobium (...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 1999