J
J. Ley
Researcher at University of Cologne
Publications - 12
Citations - 273
J. Ley is an academic researcher from University of Cologne. The author has contributed to research in topics: Polarimeter & Dichroism. The author has an hindex of 5, co-authored 11 publications receiving 267 citations.
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Journal ArticleDOI
ANKE, a new facility for medium energy hadron physics at COSY-Jülich
S. Barsov,Ulf Bechstedt,W Bothe,N Bongers,G. Borchert,W. Borgs,W Bräutigam,Markus Büscher,W. Cassing,V. Chernyshev,B. Chiladze,J. Dietrich,M. Drochner,S. Dymov,S. Dymov,W. Erven,R. Esser,R. Esser,A. Franzen,Ye. S. Golubeva,Detlev Gotta,T Grande,D. Grzonka,A. Hardt,M. Hartmann,V. Hejny,L.v Horn,L. Jarczyk,H. Junghans,A.K. Kacharava,A.K. Kacharava,B. Kamys,A. Khoukaz,T Kirchner,F. Klehr,W. Klein,H.R. Koch,V.I. Komarov,L Kondratyuk,V. Koptev,S. Kopyto,R Krause,P. Kravtsov,V.V. Kruglov,P. Kulessa,A.V. Kulikov,A.V. Kulikov,N Lang,N Langenhagen,A Lepges,J. Ley,R. Maier,S. Martin,G.G. Macharashvili,G.G. Macharashvili,S Merzliakov,S Merzliakov,K Meyer,S. Mikirtychiants,Hans-Helge Müller,P Munhofen,Andreas Mussgiller,M. Nekipelov,M. Nekipelov,V. Nelyubin,M. S. Nioradze,H. Ohm,A. Petrus,D. Prasuhn,B. Prietzschk,H.J Probst,K. Pysz,Frank Rathmann,B. Rimarzig,Zbigniew Rudy,R. Santo,H. Paetz gen. Schieck,R. Schleichert,A Schneider,Chr. Schneider,H. Schneider,U Schwarz,H. Seyfarth,A. Sibirtsev,U. Sieling,K. Sistemich,A Selikov,H. Stechemesser,H. J. Stein,A. Strzałkowski,K. H. Watzlawik,P. Wüstner,S Yashenko,B. Zalikhanov,N. I. Zhuravlev,K. Zwoll,I. Zychor,O.W.B. Schult,H. Ströher +98 more
TL;DR: ANKE as mentioned in this paper is a new experimental facility for the spectroscopy of products from proton-induced reactions on internal targets, which has recently been implemented in the accelerator ring of the cooler synchrotron COSY of the Forschungszentrum Julich (FZ-Julich), Germany.
Journal ArticleDOI
Cross sections and tensor analyzing powers Ayy of the reaction 1H(→d,pp)n in “symmetric constant relative energy” geometries at Ed=19 MeV
J. Ley,C. Düweke,R. Emmerich,A. Imig,H. Paetz gen. Schieck,Jacek Golak,Henryk Witała,Evgeny Epelbaum,A. Deltuva,A. C. Fonseca,W. Glöckle,Ulf-G. Meißner,Andreas Nogga,P. U. Sauer +13 more
TL;DR: In this paper, the authors measured the cross sections and tensor analyzing powers of the break-up reaction at four symmetric constant relative energy (SCRE) configurations, and compared the results with theoretical predictions from four different approaches.
Journal ArticleDOI
Precision Lamb-shift polarimeter for polarized atomic and ion beams
R. Engels,R. Emmerich,J. Ley,G. Tenckhoff,H. Paetz gen. Schieck,M. Mikirtytchiants,Frank Rathmann,H. Seyfarth,A. Vassiliev +8 more
TL;DR: The Lamb-shift polarimeter as mentioned in this paper measured the intensity ratios of Lyman-α transitions after Stark quenching of metastable hyperfine substates that were selected in a spin filter.
Journal ArticleDOI
The reaction 2H(p,pp)n in three kinematical configurations at E{sub p} = 16 MeV
C. Düweke,R. Emmerich,A. Imig,J. Ley,G. Tenckhoff,H. Paetz gen. Schieck,Jacek Golak,H. Witała,Evgeny Epelbaum,W. Glöckle,Andreas Nogga +10 more
TL;DR: In this paper, the authors measured the cross sections of the {sup 2}H(p,pp)n breakup reaction at E{sub p}=16 MeV in three kinematical configurations: the np final-state interaction (FSI), the coplanar star (CST), and an intermediate-star (IST) geometry.
Journal ArticleDOI
Background reduction by a getter pump around the ionization volume of a Lamb-shift polarimeter and possible improvements of polarized ion sources
R. Engels,R. Emmerich,K. Grigoryev,H. Paetz gen. Schieck,J. Ley,M. Mikirtychyants,Frank Rathmann,J. Sarkadi,H. Seyfarth,G. Tenckhoff,A. Vasilyev +10 more
TL;DR: In this article, a nonevaporable getter pump of about 2000l∕s H2 or D2 pumping speed was used to suppress the effect of the recombination of atoms in the ionizer.