Universität zu Köln

Serot, O., Amouroux, C., Bidaud, A., Capellan, N., Chabod, S., Ebran, A., Faust, H., Kessedjian, G., Koeester, U., Letourneau, A., Litaize, O., Martin, F., Materna, T., Mathieu, L., Panebianco, S., Regis, J. -M., Rudigier, M., Sage, C. and Urban, W. (2014). Recent Results from Lohengrin on Fission Yields and Related Decay Properties. Nucl. Data Sheets, 119. S. 320 - 324. SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE. ISSN 1095-9904

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Abstract

The Lohengrin mass spectrometer is one of the 40 instruments built around the reactor of the Institute Laue-Langevin (France) which delivers a very intense thermal neutron flux. Usually, Lohengrin was combined with a high-resolution ionization chamber in order to obtain good nuclear charge discrimination within a mass line, yielding an accurate isotopic yield determination. Unfortunately, this experimental procedure can only be applied for fission products with a nuclear charge less than about 42, i.e. in the light fission fragment region. Since 2008, a large collaboration has started with the aim of studying various fission aspects, mainly in the heavy fragment region. For that, a new experimental setup which allows isotopic identification by gamma-ray spectrometry has been developed and validated. This technique was applied on the Pu-239(nth, f) reaction where about 65 fission product yields were measured with an uncertainty that has been reduced on average by a factor of 2 compared with what was that previously available in nuclear data libraries. The same gamma-ray spectrometric technique is currently being applied to the study of the U-233(n(th), f) reaction. Our aim is to deduce charge and mass distributions of the fission products and to complete the experimental data that exist mainly for light fission fragments. The measurement of 41 mass yields from the Am-241(2n(th), f) reaction has been also performed. In addition to these activities on fission yield measurements, various new nanosecond isomers were discovered. Their presence can be revealed from a strong deformed ionic charge distribution compared to a 'normal' Gaussian shape. Finally, a new neutron long-counter detector designed to have a detection efficiency independent of the detected neutron energy has been built. Combining this neutron device with a Germanium detector and a beta-ray detector array allowed us to measure the beta-delayed neutron emission probability Pn of some important fission products for reactor applications.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Serot, O. UNSPECIFIED UNSPECIFIED UNSPECIFIED Amouroux, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bidaud, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Capellan, N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Chabod, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ebran, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Faust, H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kessedjian, G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Koeester, U. UNSPECIFIED UNSPECIFIED UNSPECIFIED Letourneau, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Litaize, O. UNSPECIFIED UNSPECIFIED UNSPECIFIED Martin, F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Materna, T. UNSPECIFIED UNSPECIFIED UNSPECIFIED Mathieu, L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Panebianco, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Regis, J. -M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Rudigier, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Sage, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Urban, W. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-438595
DOI:	10.1016/j.nds.2014.08.088
Journal or Publication Title:	Nucl. Data Sheets
Volume:	119
Page Range:	S. 320 - 324
Date:	2014
Publisher:	ACADEMIC PRESS INC ELSEVIER SCIENCE
Place of Publication:	SAN DIEGO
ISSN:	1095-9904
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language SEPARATOR LOHENGRIN Multiple languages Physics, Nuclear Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/43859