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in creator/contributor: "Stolterfoht, N."

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Production of autoionizing Rydberg states by transfer excitation in high energy ion atom collisions

The method of zero-degree Auger spectroscopy was used to study the production of autoionizing Rydberg states in collisions of carbon and oxygen projectiles incident at several MeV on He gas and carbon foils. The autoionization electrons were measured with high resolution so that the quantum defect corresponding to the angular momenta of the Rydberg electrons could be observed. The main purpose of the present experiment is to gain information about the n and l distribution of the Rydberg electro… more

Date: January 1, 1986

Creator: Stolterfoht, N.; Miller, P. D.; Krause, H. F.; Yamazaki, Y.; Dittner, P. F.; Pepmiller, P. L. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Correlated double electron capture in slow, highly charged ion-atom collisions

Recent measurements of autoionization electrons produced in slow, highly charged ion-atom collisions are reviewed. Mechanisms for double electron capture into equivalent and nonequivalent configurations are analyzed by comparing the probabilities for the creation of L/sub 1/L/sub 23/X Coster Kronig electrons and L-Auger electrons. It is shown that the production of the Coster-Kronig electrons is due to electron correlation effects whose analysis leads beyond the independent-particle model. The … more

Date: January 1, 1986

Creator: Stolterfoht, N.; Havener, C.C.; Phaneuf, R.A.; Swenson, J.K.; Shafroth, S.M. & Meyer, F.W.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Studies of electron correlation effects in multicharged ion atom collisions involving double capture

We review measurements of L-Coster Kronig and Auger electron production in slow, multicharged collision systems to study electron correlation effects in the process of double electron capture. The n/sup /minus/3/ law was confirmed for the production of the Coster-Kronig configurations 1s/sup 2/2pn/ell/ (n greater than or equal to 6) in O/sup 6 +/ + He collisions. Enhancement of high angular momentum /ell/ in specific 1s/sup 2/2pn/ell/ configurations was observed by means of high-resolution meas… more

Date: January 1, 1988

Creator: Stolterfoht, N.; Sommer, K.; Griffin, D. C.; Havener, C. C.; Huq, M. S.; Phaneuf, R. A. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Surgery of fast, highly charged ions studied by zero-degree Auger spectroscopy

Zero-degree Auger spectra were measured in collisions of oxygen and carbon on He with incident charge states of q = 2 to 5 and for energies from 5 to 30 MeV. Since the light target particle He acts selectively on the projectile ion, we refer to the present method as ion surgery. Apart from the one-electron processes single excitation and single loss, two-electron processes such as transfer excitation and transfer loss are studied. 17 refs., 4 figs., 1 tab.

Date: January 1, 1986

Creator: Stolterfoht, N.; Miller, P. D.; Krause, H. F.; Yamazaki, Y.; Swenson, J. K.; Bruch, R. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Electron Transfer Processes in Collisions of Highly Charged Energetic (0.1 to 1.0 MeV/nucleon) Ions with Helium Atoms

We have investigated charge transfer in collisions of energetic (0.1 - 1 MeV/nucleon) highly charged ions with helium atoms with the principal aim clarifying the nature of two-electron processes. The sensitivity of partial charge-changing cross sections (i.e., single- and double-charge transfer, transfer ionization (TI), and single and double ionization) to core configuration and scaling rules for one- and two-electron processes were investigated with iodine ions (q = 5+ ..-->.. 26+) and uraniu… more

Date: January 1, 1987

Creator: Datz, S.; Hippler, R.; Andersen, L. H.; Dittner, P. F.; Knudsen, H.; Krause, H. F. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Observation of resonant transfer and excitation in O/sup 5 +/ + He collisions through high resolution O/sup 0/ Auger electron spectroscopy

In this paper we present new evidence that (resonant transfer and excitation) RTE is an important mechanism for the production of Be-like doubly excited states in energetic collisions of Li-like O/sup 5 +/ ions incident on He. We have measured the cross sections for the production of Auger electrons from the decay of the (1s2s2p/sup 2/)/sup 3/D and the (1s2s2p/sup 2/)/sup 1/D states in O/sup 4 +/ in high resolution at O/sup 0/, as a function of the incident ion energy. We observe a resonant inc… more

Date: January 1, 1986

Creator: Swenson, J. K.; Stolterfoht, N.; Yamasaki, Y.; Miller, P. D.; Krause, H.; Dittner, P. F. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department