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X-rays from radiative electron capture of highly-charged heavy ions in an electron cooler (1994)

Liesen, D. ; Beyer, H. F. ; Finlayson, K. D. ; [et al.]

Springer

The European physical journal 30 (1994), S. 307-313

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ISSN: 1434-6079

Keywords: 34.80.Kw ; 32.30.Rj

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract The x-ray spectra induced by spontaneous capture of free cooling electrons into bare and hydrogenlike heavy ions have been observed. Au78+, Au79+ and U91+ ions were stored in the storage ring ESR at velocities between 60% and 65% of the velocity of light and the x rays were measured in coincidence with stored particles having captured one electron in the electron cooler. The lines observed can be attributed to the direct transition of cooling electrons into theK shell of the projectile and to the characteristicL →K transitions. The latter are mainly induced by capture into higher shells and subsequent cascade transitions. The measurements are compared to detailed calculations within the framework of presently available theories. Although the relative structure of the measured spectra is in fair agreement with the theoretical prediction, the total charge-changing rate in the electron cooler is about a factor of three smaller than expected.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF01426395

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Zur Ausbreitung pulsierender, runder, turbulenter Freistrahlen und Freistrahlflammen (1970)

Gál, J. ; Eickhoff, H.

Weinheim : Wiley-Blackwell

Chemie Ingenieur Technik - CIT 42 (1970), S. 73-76

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ISSN: 0009-286X

Keywords: Chemistry ; Industrial Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology

Notes: Mit Pulsationen können die turbulente Mischung in Freistrahlen und Freistrahlflammen und damit der Ablauf der chemischen Reaktion bei der Verbrennung in einem gewissen Umfang beschleunigt werden. Um Größe und Grenzen des Einflusses festzustellen, wurden einem stationären Freistrahl Pulsationen aufgeprägt. Die Eigenschaften des pulsierenden Strahls wurden anhand von Frequenzspektren, Turbulenzgraden, dimensionslosen Geschwindigkeitsprofilen und Gaskonzentrationen dargestellt und mit einem nichtpulsierenden Strahl bzw. einer entsprechenden Flamme verglichen. Einen entscheidenden Einfluß hat die Reynolds-Zahl.

Additional Material: 12 Ill.