Home News About Us Contact Contributors Disclaimer Privacy Policy Help FAQ

Home
Search
Quick Search
Advanced
Fulltext
Browse
Collections
Persons
My eDoc
Login
Name:
Password:
Documentation
Help
Support Wiki
Direct access to
document ID:


          Document History for Document ID 267503

Back to latest document version
Document Version Version Comment Date Status
267503.0 [No comment] 19.05.2006 10:03 Released

ID: 267503.0, Fritz-Haber-Institut / Molecular Physics
Partial photoionization cross sections of doubly excited helium below the ionization thresholds I8 and I9
Authors:Jiang, Y. H.; Püttner, R.; Hentges, Rainer; Viefhaus, Jens; Poygin, M.; Cacho, C.; Becker, Uwe; Rost, J. M.; Kaindl, G.
Language:English
Date of Publication (YYYY-MM-DD):2006-01-14
Title of Journal:Journal of Physics B: Atomic, Molecular and Optical Physics
Journal Abbrev.:J. Phys. B
Volume:39
Start Page:L9
End Page:L16
Copyright:2006 The American Physical Society
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:Partial photoionization cross sections (PCSs), σn, leading to final states of singly ionized helium, He⁺(n), were measured in the region of doubly excited helium below the ionization thresholds I8 and I9. The experiments were performed at BESSY II at high photon resolution, ΔE=~6 meV, using a time-of-flight electron spectrometer. A comparison with recent eigenchannel R-matrix calculations reveals good agreement. The results of these measurements underline previous studies on quantum chaos in helium, which were mainly based on theoretical results. They also allow a critical assessment of the theoretical methods that produce the data used for a statistical analysis of double-excitation states with respect to quantum chaos, which is expected to occur very close to the double-ionization threshold. PCSs provide additional information to that derivable from total cross sections (TCSs). In the present PCS spectra, the resonance 8, 410 of the secondary series, which could not be resolved in the TCS, is clearly observed.
External Publication Status:published
Document Type:Article
Communicated by:Gerard Meijer
Affiliations:Fritz-Haber-Institut/Molecular Physics
MPI für Physik Komplexer Systeme
External Affiliations:Inst. f. Experimentalphysik, FU Berlin, Germany; CCLRC Daresbury Laboratory, Warrington, Cheshire WA4 4AD, UK
Identifiers:URL:http://www.iop.org/EJ/abstract/0953-4075/39/1/L02
DOI:10.1088/0953-4075/39/1/L02