skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Absolute Photoionization Cross Section with an Ultra-high Energy Resolution for Ne in the Region of 1s Rydberg States

Abstract

The high-resolution absolute photoabsorption cross section with an absolute photon energy scale for Ne in the energy region of 864-872 eV (1s-1np Rydberg states) has been measured using a multi-electrode ionization chamber and monochromatized synchrotron radiation. The natural lifetime width of Ne 1s-13p resonance state has been obtained to be 252 {+-} 5 meV. The Ne+ (1s-1) ionization potential is determined to be 870.16 {+-} 0.04 eV by using the Rydberg formula. These absolute values are supposed to be more reliable than those previously reported.

Authors:
; ; ;  [1]; ;  [2];  [3]; ;  [4];  [5]
  1. AIST, NMIJ, Tsukuba, 305-8568 (Japan)
  2. SPring-8/JASRI, Sayo, Hyogo 679-5198 (Japan)
  3. RIKEN, Harima Institute, Sayo, Hyogo 679-5148 (Japan)
  4. Department of Chemistry, Hiroshima University, Higashi-Hiroshima 739-8526 (Japan)
  5. University of Hyogo, Kamigori, Hyogo 678-1297 (Japan)
Publication Date:
OSTI Identifier:
21049217
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 879; Journal Issue: 1; Conference: 9. international conference on synchrotron radiation instrumentation, Daegu (Korea, Republic of), 28 May - 2 Jun 2006; Other Information: DOI: 10.1063/1.2436260; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; CROSS SECTIONS; ENERGY RESOLUTION; EV RANGE; IONIZATION CHAMBERS; IONIZATION POTENTIAL; LIFETIME; MEV RANGE; NEON; NEON IONS; PHOTOIONIZATION; PHOTONS; RYDBERG STATES; SYNCHROCYCLOTRONS; SYNCHROTRON RADIATION; X-RAY SPECTRA

Citation Formats

Kato, M., Morishita, Y., Suzuki, I. H., Saito, N., Oura, M., Yamaoka, H., Tamenori, Y., Okada, K., Matsudo, T., and Gejo, T. Absolute Photoionization Cross Section with an Ultra-high Energy Resolution for Ne in the Region of 1s Rydberg States. United States: N. p., 2007. Web. doi:10.1063/1.2436260.
Kato, M., Morishita, Y., Suzuki, I. H., Saito, N., Oura, M., Yamaoka, H., Tamenori, Y., Okada, K., Matsudo, T., & Gejo, T. Absolute Photoionization Cross Section with an Ultra-high Energy Resolution for Ne in the Region of 1s Rydberg States. United States. doi:10.1063/1.2436260.
Kato, M., Morishita, Y., Suzuki, I. H., Saito, N., Oura, M., Yamaoka, H., Tamenori, Y., Okada, K., Matsudo, T., and Gejo, T. Fri . "Absolute Photoionization Cross Section with an Ultra-high Energy Resolution for Ne in the Region of 1s Rydberg States". United States. doi:10.1063/1.2436260.
@article{osti_21049217,
title = {Absolute Photoionization Cross Section with an Ultra-high Energy Resolution for Ne in the Region of 1s Rydberg States},
author = {Kato, M. and Morishita, Y. and Suzuki, I. H. and Saito, N. and Oura, M. and Yamaoka, H. and Tamenori, Y. and Okada, K. and Matsudo, T. and Gejo, T.},
abstractNote = {The high-resolution absolute photoabsorption cross section with an absolute photon energy scale for Ne in the energy region of 864-872 eV (1s-1np Rydberg states) has been measured using a multi-electrode ionization chamber and monochromatized synchrotron radiation. The natural lifetime width of Ne 1s-13p resonance state has been obtained to be 252 {+-} 5 meV. The Ne+ (1s-1) ionization potential is determined to be 870.16 {+-} 0.04 eV by using the Rydberg formula. These absolute values are supposed to be more reliable than those previously reported.},
doi = {10.1063/1.2436260},
journal = {AIP Conference Proceedings},
number = 1,
volume = 879,
place = {United States},
year = {Fri Jan 19 00:00:00 EST 2007},
month = {Fri Jan 19 00:00:00 EST 2007}
}
  • Absolute single photoionization cross-section measurements for Se{sup +} ions were performed at the Advanced Light Source (ALS) at Lawrence Berkeley National Laboratory using the photo-ion merged-beams technique. Measurements were made at a photon energy resolution of 5.5 meV from 17.75 to 21.85 eV spanning the 4s{sup 2}4p{sup 3} {sup 4}S{sub 3/2}{sup o} ground-state ionization threshold and the {sup 2}P{sub 3/2}{sup o},{sup 2}P{sub 1/2}{sup o},{sup 2}D{sub 5/2}{sup o}, and{sup 2}D{sub 3/2}{sup o} metastable state thresholds. Extensive analysis of the complex resonant structure in this region identified numerous Rydberg series of resonances and obtained the Se{sup 2+} 4s{sup 2}4p{sup 23}P{sub 2} andmore » 4s{sup 2}4p{sup 21}S{sub 0} state energies. In addition, particular attention was given to removing significant effects in the measurements due to a small percentage of higher-order undulator radiation.« less
  • Cited by 19
  • New high-resolution experimental results on Ne 1s near-threshold photoionization with subsequent decay into a 2p{sup 4}({sup 1}D{sub 2})n{sup '}p or 2p{sup 4}({sup 1}D{sub 2}){epsilon}{sup '}p state are presented. The population of Rydberg states up to n{sup '}=12 is determined as a function of excess energy. These data allow one to track in detail the transition from resonant Auger decay going along with shake-up of the spectator electron to shake-down and photoionization with recapture of the photoelectron. Results are in good agreement with a time-dependent quantum mechanical theory of Auger decay in the presence of a slow photoelectron.
  • We have observed inner-shell photoionization of Be using synchrotron radiation in the energy region of the 1s(2s2p {sup 3}P)nl Rydberg states. We used a time-of-flight method to distinguish singly and doubly charged photoions and obtained the Be{sup +} [ns; n=5-12 ({sup 1}P)3s] and Be{sup 2+} [ns; n=5-8, nd=5,6 ({sup 1}P)3s] ion spectra with high resolution corresponding to an instrumental bandpass of 13 meV. Detailed analysis enabled the autoionization parameters, resonance energy position E{sub 0}, resonance width {gamma}, and Fano parameter q, to be obtained. From the resonance positions of the {sup 3}Pnl series members, the series limit was determined tomore » be 127.97 eV, which is in good agreement with previous experiments.« less
  • No abstract prepared.