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  1. Article ; Online: Muon radiography employing the DIRC principle for density change measurements under volcanoes and fluid reservoirs

    Föhl, K. / Dahm, T. / Düren, M. / Goldenbaum, F. / Grzonka, D. / Ritman, J. / Walter, T.

    Journal of Instrumentation

    2020  

    Abstract: Mapping the density distribution and monitoring density changes under volcanoes and geological reservoirs is a major challenge in geology and volcanology. Muon radiography has a high potential to advance this field, but often there are no inexpensive ... ...

    Abstract Mapping the density distribution and monitoring density changes under volcanoes and geological reservoirs is a major challenge in geology and volcanology. Muon radiography has a high potential to advance this field, but often there are no inexpensive high-end detectors available that are suitable for field installations. A DIRC-type Cherenkov detector as a muon camera has a small dimension and is suited for such field applications (MagmaDIRC idea). In measuring directions and energies of the incoming muons one can turn the mass density integrals along the lines of flight into a radiography image, and by discarting low-energy muons with their blurred angular information one obtains sharper images. In particular one may detect the time variation of the mass density distributions situated above the horizon line in a volcanic edifice that occurs when magma is filling its plumbing system or when the level of a lava lake changes. Using numerical simulations, we discuss design aspects and the requirements of such a DIRC system. Two sites are identified for proof-of-principle field measurements. The required measurement times are estimated for the given site conditions and morphology based on the specifications of an operational DIRC system. The merits of DIRC sensors are contrasted to other muon radiography techniques.
    Publishing country de
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

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  2. Book ; Thesis: Systematische Untersuchung des pionischen doppelten Ladungsaustausches

    Föhl, Klaus

    1996  

    Author's details vorgelegt von Klaus Föhl
    Language German
    Size XIV, 159 S, graph. Darst
    Document type Book ; Thesis
    Thesis / German Habilitation thesis Univ., Diss.--Tübingen, 1996
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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  3. Book ; Thesis: Systematische Untersuchung des pionischen doppelten Ladungsaustausches

    Föhl, Klaus

    1996  

    Author's details vorgelegt von Klaus Föhl
    Language German
    Size XIV, 159 S, graph. Darst
    Document type Book ; Thesis
    Thesis / German Habilitation thesis Univ., Diss.--Tübingen, 1996
    Database Former special subject collection: coastal and deep sea fishing

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  4. Book: Erfolgsbeteiligung - die Antwort auf die Krise unserer Sozialpolitik?

    Föhl, Karl

    ((Veröffentlichungen. Arbeitsgemeinschaft zur Förderung der Partnerschaft in der Wirtschaft e.V. Reihe 3 ; H. 2))

    1962  

    Series title (Veröffentlichungen. Arbeitsgemeinschaft zur Förderung der Partnerschaft in der Wirtschaft e.V. Reihe 3 ; H. 2)
    Keywords Beteilungsverfahren ; Erfolgsbeteiligung
    Language Undetermined
    Size 40 S., 8°
    Document type Book
    Database ECONomics Information System

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  5. Article ; Online: Spin Dependence of η Meson Production in Proton-Proton Collisions Close to Threshold.

    Adlarson, P / Augustyniak, W / Bardan, W / Bashkanov, M / Bass, S D / Bergmann, F S / Berłowski, M / Bondar, A / Büscher, M / Calén, H / Ciepał, I / Clement, H / Czerwiński, E / Demmich, K / Engels, R / Erven, A / Erven, W / Eyrich, W / Fedorets, P /
    Föhl, K / Fransson, K / Goldenbaum, F / Goswami, A / Grigoryev, K / Gullström, C-O / Heijkenskjöld, L / Hejny, V / Hüsken, N / Jarczyk, L / Johansson, T / Kamys, B / Kemmerling, G / Khatri, G / Khoukaz, A / Khreptak, O / Kirillov, D A / Kistryn, S / Kleines, H / Kłos, B / Krzemień, W / Kulessa, P / Kupść, A / Kuzmin, A / Lalwani, K / Lersch, D / Lorentz, B / Magiera, A / Maier, R / Marciniewski, P / Mariański, B / Morsch, H-P / Moskal, P / Ohm, H / Parol, W / Perez Del Rio, E / Piskunov, N M / Prasuhn, D / Pszczel, D / Pysz, K / Pyszniak, A / Ritman, J / Roy, A / Rudy, Z / Rundel, O / Sawant, S / Schadmand, S / Schätti-Ozerianska, I / Sefzick, T / Serdyuk, V / Shwartz, B / Sitterberg, K / Skorodko, T / Skurzok, M / Smyrski, J / Sopov, V / Stassen, R / Stepaniak, J / Stephan, E / Sterzenbach, G / Stockhorst, H / Ströher, H / Szczurek, A / Trzciński, A / Wolke, M / Wrońska, A / Wüstner, P / Yamamoto, A / Zabierowski, J / Zieliński, M J / Złomańczuk, J / Żuprański, P / Żurek, M

    Physical review letters

    2018  Volume 120, Issue 2, Page(s) 22002

    Abstract: Taking advantage of the high acceptance and axial symmetry of the WASA-at-COSY detector, and the high polarization degree of the proton beam of COSY, the reaction p[over →]p→ppη has been measured close to threshold to explore the analyzing power A_{y}. ... ...

    Abstract Taking advantage of the high acceptance and axial symmetry of the WASA-at-COSY detector, and the high polarization degree of the proton beam of COSY, the reaction p[over →]p→ppη has been measured close to threshold to explore the analyzing power A_{y}. The angular distribution of A_{y} is determined with the precision improved by more than 1 order of magnitude with respect to previous results, allowing a first accurate comparison with theoretical predictions. The determined analyzing power is consistent with zero for an excess energy of Q=15  MeV, signaling s-wave production with no evidence for higher partial waves. At Q=72  MeV the data reveal strong interference of Ps and Pp partial waves and cancellation of (Pp)^{2} and Ss^{*}Sd contributions. These results rule out the presently available theoretical predictions for the production mechanism of the η meson.
    Language English
    Publishing date 2018-01-12
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.120.022002
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Isotensor Dibaryon in the pp→ppπ^{+}π^{-} Reaction?

    Adlarson, P / Augustyniak, W / Bardan, W / Bashkanov, M / Bergmann, F S / Berłowski, M / Bondar, A / Büscher, M / Calén, H / Ciepał, I / Clement, H / Czerwiński, E / Demmich, K / Engels, R / Erven, A / Erven, W / Eyrich, W / Fedorets, P / Föhl, K /
    Fransson, K / Goldenbaum, F / Goswami, A / Grigoryev, K / Heijkenskjöld, L / Hejny, V / Hüsken, N / Jarczyk, L / Johansson, T / Kamys, B / Kemmerling, G / Khoukaz, A / Khreptak, O / Kirillov, D A / Kistryn, S / Kleines, H / Kłos, B / Krzemień, W / Kulessa, P / Kupść, A / Lalwani, K / Lersch, D / Lorentz, B / Magiera, A / Maier, R / Marciniewski, P / Mariański, B / Morsch, H-P / Moskal, P / Ohm, H / Parol, W / Perez Del Rio, E / Piskunov, N M / Prasuhn, D / Pszczel, D / Pysz, K / Ritman, J / Roy, A / Rudy, Z / Rundel, O / Sawant, S / Schadmand, S / Schätti-Ozerianska, I / Sefzick, T / Serdyuk, V / Shwartz, B / Skorodko, T / Skurzok, M / Smyrski, J / Sopov, V / Stassen, R / Stepaniak, J / Stephan, E / Sterzenbach, G / Stockhorst, H / Ströher, H / Szczurek, A / Trzciński, A / Wolke, M / Wrońska, A / Wüstner, P / Yamamoto, A / Zabierowski, J / Zieliński, M J / Złomańczuk, J / Żuprański, P / Żurek, M

    Physical review letters

    2018  Volume 121, Issue 5, Page(s) 52001

    Abstract: Exclusive measurements of the quasifree pp→ppπ^{+}π^{-} reaction have been carried out at WASA@COSY by means of pd collisions at T_{p}=1.2  GeV. Total and differential cross sections have been extracted covering the energy region T_{p}=1.08-1.36  GeV, ... ...

    Abstract Exclusive measurements of the quasifree pp→ppπ^{+}π^{-} reaction have been carried out at WASA@COSY by means of pd collisions at T_{p}=1.2  GeV. Total and differential cross sections have been extracted covering the energy region T_{p}=1.08-1.36  GeV, which is the region of N^{*}(1440) and Δ(1232)Δ(1232) resonance excitations. Calculations describing these excitations by t-channel meson exchange are at variance with the measured differential cross sections and underpredict substantially the experimental total cross section. An isotensor ΔN dibaryon resonance with I(J^{P})=2(1^{+}) produced associatedly with a pion is able to overcome these deficiencies.
    Language English
    Publishing date 2018-08-13
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.121.052001
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: Low-energy differential cross sections of pion-proton ( pi +/-p) scattering. II. Phase shifts at T pi =32.7, 45.1, and 68.6 MeV.

    Joram / Metzler / Jaki / Kluge / Matthäy / Wieser / Barnett / Bilger / Clement / Föhl / Heitlinger / Krell / Wagner

    Physical review. C, Nuclear physics

    1995  Volume 51, Issue 4, Page(s) 2159–2165

    Language English
    Publishing date 1995-04
    Publishing country United States
    Document type Journal Article
    ZDB-ID 209771-0
    ISSN 1089-490X ; 0556-2813 ; 2469-9985
    ISSN (online) 1089-490X
    ISSN 0556-2813 ; 2469-9985
    DOI 10.1103/physrevc.51.2159
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article: Photoproduction of eta-mesic 3He.

    Pfeiffer, M / Ahrens, J / Annand, J R M / Beck, R / Caselotti, G / Cherepnya, S / Föhl, K / Fog, L S / Hornidge, D / Janssen, S / Kashevarov, V / Kondratiev, R / Kotulla, M / Krusche, B / McGeorge, J C / MacGregor, I J D / Mengel, K / Messchendorp, J G / Metag, V /
    Novotny, R / Rost, M / Sack, S / Sanderson, R / Schadmand, S / Thomas, A / Watts, D P

    Physical review letters

    2004  Volume 92, Issue 25 Pt 1, Page(s) 252001

    Abstract: The photoproduction of eta-mesic 3He has been investigated using the TAPS calorimeter at the Mainz Microtron accelerator facility MAMI. The total inclusive cross section for the reaction gamma3He-->etaX has been measured for photon energies from ... ...

    Abstract The photoproduction of eta-mesic 3He has been investigated using the TAPS calorimeter at the Mainz Microtron accelerator facility MAMI. The total inclusive cross section for the reaction gamma3He-->etaX has been measured for photon energies from threshold to 820 MeV. The total and angular differential coherent eta cross sections have been extracted up to energies of 745 MeV. A resonancelike structure just above the eta production threshold with an isotropic angular distribution suggests the existence of a resonant quasibound state. This is supported by studies of a competing decay channel of such a quasibound eta-mesic nucleus into pi(0)pX. A binding energy of (-4.4+/-4.2) MeV and a width of (25.6+/-6.1) MeV is deduced for the quasibound eta-mesic state in 3He.
    Language English
    Publishing date 2004-06-25
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.92.252001
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article: Measurement of the pi +p

    Wieser / Denig / von Hagel U / Joram / Kluge / Andermann / Bilger / Clement / Föhl / Heitlinger / Wagner / van den Brandt B / Foroughi / Hautle / Konter / Mango / Kovalev

    Physical review. C, Nuclear physics

    1996  Volume 54, Issue 4, Page(s) 1930–1934

    Language English
    Publishing date 1996-10
    Publishing country United States
    Document type Journal Article
    ZDB-ID 209771-0
    ISSN 1089-490X ; 0556-2813 ; 2469-9985
    ISSN (online) 1089-490X
    ISSN 0556-2813 ; 2469-9985
    DOI 10.1103/physrevc.54.1930
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article: Low-energy pionic double charge exchange on the beta beta -instable nuclei 128,130Te.

    Föhl / Barnett / Bilger / Clement / Krell / Wagner / Jaki / Joram / Kluge / Metzler / Wieser / Boudrie / Morris / Abela / Foroughi / Renker

    Physical review. C, Nuclear physics

    1996  Volume 53, Issue 5, Page(s) R2033–R2037

    Language English
    Publishing date 1996-05
    Publishing country United States
    Document type Journal Article
    ZDB-ID 209771-0
    ISSN 1089-490X ; 0556-2813 ; 2469-9985
    ISSN (online) 1089-490X
    ISSN 0556-2813 ; 2469-9985
    DOI 10.1103/physrevc.53.r2033
    Database MEDical Literature Analysis and Retrieval System OnLINE

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