Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Lars Gerchow"'
Autor:
Sayani Biswas, Isabel Megatli-Niebel, Lilian Raselli, Ronald Simke, Thomas Elias Cocolios, Nilesh Deokar, Matthias Elender, Lars Gerchow, Herbert Hess, Rustem Khasanov, Andreas Knecht, Hubertus Luetkens, Kazuhiko Ninomiya, Angela Papa, Thomas Prokscha, Peter Reiter, Akira Sato, Nathal Severijns, Toni Shiroka, Michael Seidlitz, Stergiani Marina Vogiatzi, Chennan Wang, Frederik Wauters, Nigel Warr, Alex Amato
Publikováno v:
Heritage Science, Vol 11, Iss 1, Pp 1-17 (2023)
Abstract A knob bow fibula (Bügelknopffibel) of the Leutkirch type, which typologically belongs to the second half of the 4th and early 5th century CE, was excavated in 2018 in the Roman city of Augusta Raurica, present-day Kaiseraugst (AG, Switzerl
Externí odkaz:
https://doaj.org/article/3338543a17224e12b366fc55bb028fb1
Autor:
Sayani Biswas, Lars Gerchow, Hubertus Luetkens, Thomas Prokscha, Aldo Antognini, Niklaus Berger, Thomas Elias Cocolios, Rugard Dressler, Paul Indelicato, Klaus Jungmann, Klaus Kirch, Andreas Knecht, Angela Papa, Randolf Pohl, Maxim Pospelov, Elisa Rapisarda, Peter Reiter, Narongrit Ritjoho, Stephanie Roccia, Nathal Severijns, Alexander Skawran, Stergiani Marina Vogiatzi, Frederik Wauters, Lorenz Willmann, Alex Amato
Publikováno v:
Applied Sciences, Vol 12, Iss 5, p 2541 (2022)
The toolbox for material characterization has never been richer than today. Great progress with all kinds of particles and interaction methods provide access to nearly all properties of an object under study. However, a tomographic analysis of the su
Externí odkaz:
https://doaj.org/article/83e466cc44094380acbdb4939f24e660
Autor:
Lars Gerchow, Saverio Braccini, Tommaso Stefano Carzaniga, David Cooke, Max Döbeli, Klaus Kirch, Ulli Köster, Arnold Müller, Nicholas P. van der Meulen, Christiaan Vermeulen, André Rubbia, Paolo Crivelli
Publikováno v:
Instruments, Vol 2, Iss 3, p 10 (2018)
We report on the realisation of a cyclotron trap assisted positron tungsten moderator for the conversion of positrons with a broad keV–few MeV energy spectrum to a mono-energetic eV beam with an efficiency of 1.8(2)% defined as the ratio of the slo
Externí odkaz:
https://doaj.org/article/c903af81307541199f8b4c0a2243a078
Autor:
Lars Gerchow, Sayani Biswas, Gianluca Janka, Carlos Vigo, Andreas Knecht, Stergiani Marina Vogiatzi, Narongrit Ritjoho, Thomas Prokscha, Hubertus Luetkens, Alex Amato
Publikováno v:
Review of Scientific Instruments, 94 (4)
The usage of muonic x-rays to study elemental properties like nuclear radii ranges back to the seventies. This triggered the pioneering work at the Paul Scherrer Institute (PSI), during the eighties on the Muon-induced x-ray emission (MIXE) technique
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::865f158e63dc621c76b833592bc6ba47
Publikováno v:
Physical review letters. 124(10)
We present the results of a search for a hidden mirror sector in positronium decays with a sensitivity comparable with the bounds set by the prediction of the primordial He$^{4}$ abundance from Big Bang Nucleosynthesis. No excess of events compatible
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4bb00c2f5bb557349bcaa00d287008f5
https://pubmed.ncbi.nlm.nih.gov/32216431
https://pubmed.ncbi.nlm.nih.gov/32216431
Autor:
T. Prokscha, M. Tuzi, Andreas Suter, Paolo Crivelli, Xiaojie Ni, Zaher Salman, Naofumi Kuroda, Carlos Vigo, G. Janka, R. Nishi, Lars Gerchow, Zakary Burkley, Ben Ohayon
Publikováno v:
The European Physical Journal C
European Physical Journal C: Particles and Fields, Vol 80, Iss 9, Pp 1-7 (2020)
The European Physical Journal. C, Particles and Fields
European Physical Journal
The European Physical Journal C, 80 (9)
European Physical Journal C: Particles and Fields, Vol 80, Iss 9, Pp 1-7 (2020)
The European Physical Journal. C, Particles and Fields
European Physical Journal
The European Physical Journal C, 80 (9)
Precision spectroscopy of the Muonium Lamb shift and fine structure requires a robust source of 2S Muonium. To date, the beam-foil technique is the only demonstrated method for creating such a beam in vacuum. Previous experiments using this technique
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ba5620ee99c64d22d122686f67b9a902
Autor:
Javier Pérez-Ramírez, Paolo Crivelli, David R. Cooke, Robbie Warringham, R. S. Vallery, Lars Gerchow, Sharon Mitchell
Publikováno v:
The Journal of Physical Chemistry C. 122:3443-3453
Positron annihilation lifetime spectroscopy (PALS) is a tool used to study pore networks in zeolites, as the diffusion of metastable ortho-positronium (o-Ps, an electron–positron bound pair) provides insights into connectivity that cannot be obtain
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8b79c6fdc299726cc8f6c7cb654fd61a
https://doi.org/10.1021/acs.jpcc.7b11336
https://doi.org/10.1021/acs.jpcc.7b11336
Autor:
Robbie Warringham, A. Zubiaga, Javier Pérez-Ramírez, Sharon Mitchell, David R. Cooke, Lars Gerchow, Paolo Crivelli
Publikováno v:
ChemPhysChem. 18:470-479
Positron annihilation spectroscopy (PAS) is a powerful method to study the size and connectivity of pores in zeolites. The lifetime of positronium within the host material is commonly described by the Tao-Eldrup model. However, one of its largest lim
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2155952a18d496cd91bc2ec7f20c0a24
https://doi.org/10.1002/cphc.201601258
https://doi.org/10.1002/cphc.201601258
Autor:
Javier Pérez-Ramírez, A. Zubiaga, David R. Cooke, Lars Gerchow, Paolo Crivelli, Sharon Mitchell, Robbie Warringham
Publikováno v:
The Journal of Physical Chemistry C. 120:25451-25461
Templating approaches play a key role in expanding the structural diversity of many important classes of porous materials. Understanding the interaction of the templating agent with the resulting porous framework and the mechanism of detemplation is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d39d1114c1026a2898f29211992c1aee
https://doi.org/10.1021/acs.jpcc.6b08931
https://doi.org/10.1021/acs.jpcc.6b08931