Universität zu Köln

Regis, J. -M., Materna, Th., Pascovici, G., Christen, S., Dewald, A., Fransen, C., Jolie, J., Petkov, P. and Zell, K. O. (2010). Improvement of the intrinsic time resolving power of the Cologne iron-free orange type electron spectrometers. Rev. Sci. Instrum., 81 (11). MELVILLE: AMER INST PHYSICS. ISSN 0034-6748

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Abstract

Conversion electron spectroscopy represents an important tool for nuclear structure analysis of medium and heavy nuclei. Two iron-free magnetic electron spectrometers of the orange type have been installed at the Institute for Nuclear Physics of the University of Cologne. The very large transmission of 15% and the very good energy resolution of 1% makes the iron-free orange spectrometer a powerful instrument. By means of fast timing techniques, lifetimes of nuclear excited states can be measured with an accuracy better than 20 ps. For the first time, the energy dependent centroid position of prompt events yielding the time-walk characteristics (the prompt curve) of the orange spectrometer fast timing setup has been measured using prompt secondary delta-electrons generated in a pulsed beam experiment. The prompt curve calibrated as a function of energy allows precise lifetime determination down to a few tens of picoseconds by the use of the centroid shift method. (C) 2010 American Institute of Physics. [doi:10.1063/1.3499259]

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Regis, J. -M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Materna, Th. UNSPECIFIED UNSPECIFIED UNSPECIFIED Pascovici, G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Christen, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Dewald, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Fransen, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Jolie, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Petkov, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Zell, K. O. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-493986
DOI:	10.1063/1.3499259
Journal or Publication Title:	Rev. Sci. Instrum.
Volume:	81
Number:	11
Date:	2010
Publisher:	AMER INST PHYSICS
Place of Publication:	MELVILLE
ISSN:	0034-6748
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language LIFETIME MEASUREMENTS; TANDEM ACCELERATOR; AU NUCLEI Multiple languages Instruments & Instrumentation; Physics, Applied Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/49398