Zobrazeno 1 - 10
of 105
pro vyhledávání: '"Peter Sperr"'
Autor:
Ulrich Ackermann, Benjamin Löwe, Marcel Dickmann, Johannes Mitteneder, Peter Sperr, Werner Egger, Markus Reiner, Günther Dollinger
Publikováno v:
New Journal of Physics, Vol 18, Iss 11, p 113030 (2016)
We have performed first four-dimensional age-momentum correlation (4D-AMOC) measurements at a pulsed high intensity positron micro beam and determined the absolute value of the three-dimensional momentum of the electrons annihilating with the positro
Externí odkaz:
https://doaj.org/article/1b7064f0e0ff4c63a334b62949fc6e5e
Autor:
Stephan Eschbaumer, Günther Dollinger, Benjamin Löwe, Peter Sperr, Andreas Bergmaier, Christoph Greubel, P. Schotanus, Werner Egger, Ulrich Ackermann
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 823:56-64
To perform Four Dimensional Age Momentum Correlation measurements in the near future, where one obtains the positron lifetime in coincidence with the three dimensional momentum of the electron annihilating with the positron, we have investigated the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a7b5ecd1c14a9d5c7c99ddaaa090b791
https://doi.org/10.1016/j.nima.2016.03.110
https://doi.org/10.1016/j.nima.2016.03.110
Autor:
Ulrich Ackermann, Werner Egger, Günther Dollinger, Johannes Mitteneder, Marcel Dickmann, Peter Sperr, Gottfried Kögel, C. Piochacz
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 821:40-43
An elevator increases the potential energy of a particle beam with respect to ground potential without any alteration of kinetic energy and other beam parameters. This elevator is necessary for the implementation of the Munich Scanning Positron Micro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::09e76a932b302a38610c0c09e11d1f08
https://doi.org/10.1016/j.nima.2016.03.011
https://doi.org/10.1016/j.nima.2016.03.011
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 786:5-11
We have investigated the time and energy resolution ( T Timing , ∆ E / E ) of four different scintillator materials BaF 2 , BC-418, LYSO and CeBr 3 at a gamma energy of 511 keV in views of their possible usage for time, energy and position resoluti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fa9474985b733852d938d3b149b2da2b
https://doi.org/10.1016/j.nima.2015.03.016
https://doi.org/10.1016/j.nima.2015.03.016
Autor:
Vladimir Zaporojtchenko, Franz Faupel, Stephan Harms, Peter Sperr, Klaus Rätzke, Werner Egger, Thomas Strunskus, Christina Pakula
Publikováno v:
Journal of Polymer Science Part B: Polymer Physics. 49:404-408
Polymers including chromophores, which can be switched by light, have been studied extensively during the last years due to a host of potential applications which arise from the marked changes in physical properties on switching. Even though there is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::874d8da31c98767256a6dbdf3bb1e9fb
https://doi.org/10.1002/polb.22201
https://doi.org/10.1002/polb.22201
Autor:
Gerhard Brauer, Werner Egger, D. Grambole, Wolfgang Skorupa, Peter Sperr, Ivan Procházka, Jan Kuriplach, Thomas E. Cowan, Wolfgang Anwand, Jakub Čížek
Publikováno v:
Physica Status Solidi (A) 207(2010), 2415-2425
Nominally undoped, hydrothermally grown ZnO single crystals have been investigated after doping in remote H plasma. Characterizations have been made by positron annihilation (slow positron implantation spectroscopy, lifetime, coincidence Doppler broa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::80a17cedd6599a1fede7ea728eb0a0ab
https://doi.org/10.1002/pssa.200925609
https://doi.org/10.1002/pssa.200925609
Autor:
Christian Teichert, Werner Egger, Igor Beinik, Wolfgang Anwand, Jan Kuriplach, Peter Sperr, Wolfgang Skorupa, Aleksandra B. Djurišić, Sergei Zviagin, Erik Cizmar, Chi Chung Ling, Xinyi Chen, Y. F. Hsu, Jan Lang, Gerhard Brauer, Yan Yan Xi, D. Grambole, Lin Wang
Publikováno v:
Physica Status Solidi (C) 6(2009)11, 2556-2560
ZnO nanostructures are of special interest for device applications. However, their structural characterization remains an ongoing challenge. This paper reviews recent efforts and latest achievements in this direction. Results comprise PAS in the form
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4b5e2909a19e3220092a7b6355dcdfd9
https://doi.org/10.1002/pssc.200982081
https://doi.org/10.1002/pssc.200982081
Publikováno v:
physica status solidi c. 6:2329-2332
Positron Annihilation Lifetime Spectroscopy has been performed with a pulsed positron beam to investigate the nature and evolution of implantation-induced defects created in the track region (TR) of 800 keV 3He ions at different fluences. At high flu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a3ddddf93482d4a46ba7c5221ea922bb
https://doi.org/10.1002/pssc.200982114
https://doi.org/10.1002/pssc.200982114
Autor:
Günther Dollinger, R. Repper, Werner Egger, Christoph Hugenschmidt, C. Piochacz, Peter Sperr, Gottfried Kögel
Publikováno v:
Applied Surface Science. 255:35-38
The Munich pulsed low energy positron beam system (PLEPS) is now installed at the high intensity positron source (NEPOMUC) at the Munich Research Reactor FRM-II. In order to enhance the performance of the system several improvements have been impleme
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aa89779a6ba38e83ae01f4c8e1b247fd
https://doi.org/10.1016/j.apsusc.2008.05.307
https://doi.org/10.1016/j.apsusc.2008.05.307
Publikováno v:
Applied Surface Science. 255:209-212
Contamination-tolerant adhesives are of ever increasing importance in industrial applications. The possible failure mechanisms of adhesive bonds in these adhesives are however still poorly understood. Results of a series of investigations with our pu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a7b95c454ad2bdc4293b3fb7246e2035
https://doi.org/10.1016/j.apsusc.2008.05.205
https://doi.org/10.1016/j.apsusc.2008.05.205