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First high-statistics and high-resolution recoil-ion data from the WITCH retardation spectrometer
/ Finlay, P (Leuven U.) ; Breitenfeldt, M (Leuven U.) ; Porobić, T (Leuven U.) ; Wursten, E (Leuven U.) ; Ban, G (Caen U.) ; Beck, M (Munster U.) ; Couratin, C (Leuven U.) ; Fabian, X (Caen U.) ; Fléchard, X (Caen U.) ; Friedag, P (Munster U.) et al.
The first high-statistics and high-resolution data set for the integrated recoil-ion energy spectrum following the $ \beta^+$ decay of$^{35}$Ar has been collected with the WITCH retardation spectrometer located at CERN-ISOLDE. Over 25 million recoil-ion events were recorded on a large-area multichannel plate (MCP) detector with a time-stamp precision of 2ns and position resolution of 0.1mm due to the newly upgraded data acquisition based on the LPC Caen FASTER protocol. [...]
2016
- Published in : Eur. Phys. J. A 52 (2016) 206
Fulltext: PDF;
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Space-charge effects in Penning ion traps
/ Porobić, T (KU Leuven, Dept. Phys. Astron.) ; Beck, M (Munster U.) ; Breitenfeldt, M (KU Leuven, Dept. Phys. Astron.) ; Couratin, C (Caen U.) ; Finlay, P (KU Leuven, Dept. Phys. Astron.) ; Knecht, A (KU Leuven, Dept. Phys. Astron. ; CERN) ; Fabian, X (Caen U.) ; Friedag, P (Munster U.) ; Fléchard, X (Caen U.) ; Liénard, E (Caen U.) et al.
The influence of space-charge on ion cyclotron resonances and magnetron eigenfrequency in a gas-filled Penning ion trap has been investigated. Off-line measurements with View the MathML source using the cooling trap of the WITCH retardation spectrometer-based setup at ISOLDE/CERN were performed. [...]
2015 - 10 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 785 (2015) 153-162
Elsevier Open Access article: PDF;
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Recoil-ion momentum spectroscopy
/ Ullrich, J ; Schmitt, W ; Dörner, R ; Jagutzki, O ; Mergel, V ; Moshammer, R ; Schmidt-Böcking, H ; Spielberger, L ; Unverzagt, M ; Olson, R E
GSI-97-41.-
Darmstadt : GSI, 1998 - 12 p.
Access to fulltext document: TIF PDF;
In : 20th International Conference on the Physics of Electronic and Atomic Collisions, Vienna, Austria, 23 - 29 Jul 1997, pp.421-439
- CERN library copies
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Search for a scalar component in the weak interaction
/ Zakoucky, Dalibor (Rez, Nucl. Phys. Inst.) ; Baczyk, Pavel (CERN) ; Ban, Gilles (Caen U.) ; Beck, Marcus (Munster U. ; Mainz U.) ; Breitenfeldt, Martin (KU Leuven, Dept. Phys. Astron.) ; Couratin, Claire (Caen U.) ; Fabian, Xavier (Caen U.) ; Finlay, Paul (KU Leuven, Dept. Phys. Astron.) ; Flechard, Xavier (Caen U.) ; Friedag, Peter (Munster U. ; U. Munster) et al.
Weak interactions are described by the Standard Model which uses the basic assumption of a pure “V(ector)-A(xial vector)” character for the interaction. However, after more than half a century of model development and experimental testing of its fundamental ingredients, experimental limits for possible admixtures of scalar and/or tensor interactions are still as high as 7%. [...]
2015 - 4 p.
- Published in : JPS Conf. Proc. 6 (2015) 030065
In : 2nd Conference on Advances in Radioactive Isotope Science, Tokyo, Japan, 1 - 6 Jun 2014, pp.030065
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Three dimensional momentum distributions of Recoil-Ions and photoelectrons
/ Ullrich, J ; Dörner, R ; Jagutzki, O ; Mergel, V ; Moshammer, R ; Schmidt-Böcking, H ; Schmitt, W ; Spielberger, L ; Unverzagt, M ; Vogt, T
GSI-96-44.
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1996. - 16 p.
Access to fulltext document - Access to fulltext document - CERN library copies
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Computer controls for the WITCH experiment
/ Tandecki, M (Katholieke Univ Leuven, Inst Kern & Stralingsfys, B-3001 Louvain, Belgium.) ; Beck, M (Munster U.) ; Van Gorp, S (Katholieke Univ Leuven, Inst Kern & Stralingsfys, B-3001 Louvain, Belgium.) ; Friedag, P (Munster U.) ; De Leebeeck, V (Katholieke Univ Leuven, Inst Kern & Stralingsfys, B-3001 Louvain, Belgium.) ; Beck, D (Darmstadt, GSI) ; Brand, H (Darmstadt, GSI) ; Weinheimer, C (Munster U.) ; Breitenfeldt, M (Katholieke Univ Leuven, Inst Kern & Stralingsfys, B-3001 Louvain, Belgium.) ; Traykov, E (Katholieke Univ Leuven, Inst Kern & Stralingsfys, B-3001 Louvain, Belgium.) et al.
The WITCH experiment is a medium-scale experimental set-up located at ISOLDE/CERN. It combines a double Penning trap system with,a retardation spectrometer for energy measurements of recoil ions from beta decay. [...]
2011
- Published in : Nucl. Instrum. Methods Phys. Res., A 629 (2011) 396-405
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The WITCH experiment : Acquiring the first recoil ion spectrum
/ Kozlov, V.Yu. (Leuven U.) ; Beck, M. (Munster U.) ; Coeck, S. (Leuven U.) ; Delahaye, P. (CERN) ; Friedag, P. (Munster U.) ; Herbane, M. (Leuven U.) ; Herlert, A. (CERN) ; Kraev, I.S. (Leuven U.) ; Tandecki, M. (Leuven U.) ; Van Gorp, S. (Leuven U.) et al.
The standard model of the electroweak interaction describes beta-decay in the well-known V-A form. Nevertheless, the most general Hamiltonian of a beta-decay includes also other possible interaction types, e.g. [...]
arXiv:0807.3421.-
2008 - 11 p.
- Published in : Nucl. Instrum. Methods Phys. Res., B 266 (2008) 4515-4520
Fulltext: PDF; External link: Preprint
In : 15th International Conference on Electromagnetic Isotope Separators and Techiques Related to their Applications, Deauville, France, 24 - 29 Jun 2007, pp.4515-4520
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