NSR Query Results
Output year order : Descending NSR database version of April 26, 2024. Search: Author = A.Knecht Found 17 matches. 2023AD02 Eur.Phys.J. A 59, 15 (2023) A.Adamczak, A.Antognini, N.Berger, T.E.Cocolios, N.Deokar, Ch.E.Dullmann, A.Eggenberger, R.Eichler, M.Heines, H.Hess, P.Indelicato, K.Kirch, A.Knecht, J.J.Krauth, J.Nuber, A.Ouf, A.Papa, R.Pohl, E.Rapisarda, P.Reiter, N.Ritjoho, S.Roccia, M.Seidlitz, N.Severijns, K.von Schoeler, A.Skawran, S.M.Vogiatzi, N.Warr and F.Wauters Muonic atom spectroscopy with microgram target material
doi: 10.1140/epja/s10050-023-00930-y
2022MU16 Phys.Rev.Lett. 129, 182502 (2022) P.Muller, Y.Bagdasarova, R.Hong, A.Leredde, K.G.Bailey, X.Flechard, A.Garcia, B.Graner, A.Knecht, O.Naviliat-Cuncic, T.P.O'Connor, M.G.Sternberg, D.W.Storm, H.E.Swanson, F.Wauters, D.W.Zumwalt β-Nuclear-Recoil Correlation from 6He Decay in a Laser Trap RADIOACTIVITY 6He(β-); measured decay products, Eβ, Iβ; deduced yields, exotic tensor-type contributions to the charged weak current. Comparison with systematics.
doi: 10.1103/PhysRevLett.129.182502
2021KR03 Nature(London) 589, 527 (2021) J.J.Krauth, K.Schuhmann, M.A.Ahmed, F.D.Amaro, P.Amaro, F.Biraben, T.-L.Chen, D.S.Covita, A.J.Dax, M.Diepold, L.M.P.Fernandes, B.Franke, S.Galtier, A.L.Gouvea, J.Gotzfried, T.Graf, T.W.Hansch, J.Hartmann, M.Hildebrandt, P.Indelicato, L.Julien, K.Kirch, A.Knecht, Y.-W.Liu, J.Machado, C.M.B.Monteiro, F.Mulhauser, B.Naar, T.Nebel, F.Nez, J.M.F.dos Santos, J.P.Santos, C.I.Szabo, D.Taqqu, J.F.C.A.Veloso, J.Vogelsang, A.Voss, B.Weichelt, R.Pohl, A.Antognini, F.Kottmann Measuring the α-particle charge radius with muonic helium-4 ions ATOMIC PHYSICS 4He; measured frequencies; deduced resonances, isotope shifts, 2S-2P transitions in the muonic helium-4 ion that yields a precise determination of the root-mean-square charge radius of the α particle. Comparison with available data.
doi: 10.1038/s41586-021-03183-1
2020AB02 Phys.Rev.Lett. 124, 081803 (2020) C.Abel, S.Afach, N.J.Ayres, C.A.Baker, G.Ban, G.Bison, K.Bodek, V.Bondar, M.Burghoff, E.Chanel, Z.Chowdhuri, P.-J.Chiu, B.Clement, C.B.Crawford, M.Daum, S.Emmenegger, L.Ferraris-Bouchez, M.Fertl, P.Flaux, B.Franke, A.Fratangelo, P.Geltenbort, K.Green, W.C.Griffith, M.van der Grinten, Z.D.Grujic, P.G.Harris, L.Hayen, W.Heil, R.Henneck, V.Helaine, N.Hild, Z.Hodge, M.Horras, P.Iaydjiev, S.N.Ivanov, M.Kasprzak, Y.Kermaidic, K.Kirch, A.Knecht, P.Knowles, H.-C.Koch, P.A.Koss, S.Komposch, A.Kozela, A.Kraft, J.Krempel, M.Kuzniak, B.Lauss, T.Lefort, Y.Lemiere, A.Leredde, P.Mohanmurthy, A.Mtchedlishvili, M.Musgrave, O.Naviliat-Cuncic, D.Pais, F.M.Piegsa, E.Pierre, G.Pignol, C.Plonka-Spehr, P.N.Prashanth, G.Quemener, M.Rawlik, D.Rebreyend, I.Rienacker, D.Ries, S.Roccia, G.Rogel, D.Rozpedzik, A.Schnabel, P.Schmidt-Wellenburg, N.Severijns, D.Shiers, R.Tavakoli Dinani, J.A.Thorne, R.Virot, J.Voigt, A.Weis, E.Wursten, G.Wyszynski, J.Zejma, J.Zenner, G.Zsigmond Measurement of the Permanent Electric Dipole Moment of the Neutron NUCLEAR MOMENTS 1NN; measured frequencies; deduced the electric dipole moment (EDM) of the neutron or its upper limit.
doi: 10.1103/PhysRevLett.124.081803
2020AN04 Phys.Rev. C 101, 054313 (2020) A.Antognini, N.Berger, T.E.Cocolios, R.Dressler, R.Eichler, A.Eggenberger, P.Indelicato, K.Jungmann, C.H.Keitel, K.Kirch, A.Knecht, N.Michel, J.Nuber, N.S.Oreshkina, A.Ouf, A.Papa, R.Pohl, M.Pospelov, E.Rapisarda, N.Ritjoho, S.Roccia, N.Severijns, A.Skawran, S.M.Vogiatzi, F.Wauters, L.Willmann Measurement of the quadrupole moment of 185Re and 187Re from the hyperfine structure of muonic X rays ATOMIC PHYSICS 185,187Re, 208Pb(μ-, μ-'), E at 29 MeV/c, [negative muon beam from the decay of pions produced in C(p, π), E=590 MeV]; measured Eγ, Iγ, energy and intensities of muonic x-rays using two HPGe detectors at the HIPA facility of Paul Scherrer Institut; deduced hyperfine splitting of the 5g to 4f muonic atom transitions, and compared to state-of-the-art atomic theoretical predictions; extracted spectroscopic quadrupole moments for ground states of 185Re and 187Re. NUCLEAR MOMENTS 185,187Re; measured muonic atom hyperfine structure; deduced spectroscopic quadrupole moments of ground states. Comparison with previous experimental measurement using natural Re target, and with theoretical predictions.
doi: 10.1103/PhysRevC.101.054313
2017HO25 Phys.Rev. A 96, 053411 (2017) R.Hong, A.Leredde, Y.Bagdasarova, X.Flechard, A.Garcia, A.Knecht, P.Muller, O.Naviliat-Cuncic, J.Pedersen, E.Smith, M.Sternberg, D.W.Storm, H.E.Swanson, F.Wauters, D.Zumwalt Charge-state distribution of Li ions from the β decay of laser-trapped 6He atoms RADIOACTIVITY 6He(β-) [from 6Li(d, t), E=18 MeV]; measured Eβ, Iβ, TOF; deduced 6Li ion charge fractions. Comparison with available data.
doi: 10.1103/PhysRevA.96.053411
2016FI09 Eur.Phys.J. A 52, 206 (2016) P.Finlay, M.Breitenfeldt, T.Porobic, E.Wursten, G.Ban, M.Beck, C.Couratin, X.Fabian, X.Flechard, P.Friedag, P.Friedag, F.Gluck, A.Herlert, A.Knecht, V.Y.Kozlov, E.Lienard, G.Soti, M.Tandecki, E.Traykov, S.Van Gorp, Ch.Weinheimer, D.Zakoucky, N.Severijns First high-statistics and high-resolution recoil-ion data from the WITCH retardation spectrometer
doi: 10.1140/epja/i2016-16206-y
2014AF03 Phys.Lett. B 739, 128 (2014) S.Afach, C.A.Baker, G.Ban, G.Bison, K.Bodek, M.Burghoff, Z.Chowdhuri, M.Daum, M.Fertl, B.Franke, P.Geltenbort, K.Green, M.G.D.van der Grinten, Z.Grujic, P.G.Harris, W.Heil, V.Helaine, R.Henneck, M.Horras, P.Iaydjiev, S.N.Ivanov, M.Kasprzak, Y.Kermaidic, K.Kirch, A.Knecht, H-C.Koch, J.Krempel, M.Kuzniak, B.Lauss, T.Lefort, Y.Lemieree, A.Mtchedlishvili, O.Naviliat-Cuncic, J.M.Pendlebury, M.Perkowski, E.Pierre, F.M.Piegsa, G.Pignol A measurement of the neutron to 199Hg magnetic moment ratio NUCLEAR MOMENTS 199Hg; measured frequency ratios; deduced neutron to mercury gyromagnetic ratio. Ultracold neutrons and mercury atoms stored in the same apparatus.
doi: 10.1016/j.physletb.2014.10.046
2014SO16 Phys.Rev. C 90, 035502 (2014) G.Soti, F.Wauters, M.Breitenfeldt, P.Finlay, P.Herzog, A.Knecht, U.Koster, I.S.Kraev, T.Porobic, P.N.Prashanth, I.S.Towner, C.Tramm, D.Zakoucky, N.Severijns Measurement of the β-asymmetry parameter of 67Cu in search for tensor-type currents in the weak interaction RADIOACTIVITY 67,68,68mCu(β-)[from U(p, X), E=1.4 GeV, followed by fragment separation by RILIS and GPS at CERN-ISOLDE]; measured Eβ, Iβ, β(θ, H, temp) by using nuclear implantation into Cold On-Line Equipment (NICOLE) 3He-4He dilution refrigerator; deduced β-asymmetry parameter for 67Cu decay and constraints on tensor coupling constants, nuclear matrix elements. Technique of LTNO used in combination with GEANT4-based Monte Carlo simulations. Comparisons with previous experimental measurements, and with predictions of standard model.
doi: 10.1103/PhysRevC.90.035502
2012KN01 Phys.Rev.Lett. 108, 122502 (2012) A.Knecht, R.Hong, D.W.Zumwalt, B.G.Delbridge, A.Garcia, P.Muller, H.E.Swanson, I.S.Towner, S.Utsuno, W.Williams, C.Wrede Precision Measurement of the 6He Half-Life and the Weak Axial Current in Nuclei RADIOACTIVITY 6He(β-) [from 7Li(d, 3He)6He, E=5.8 MeV]; measured decay products, Eβ, Iβ; deduced T1/2, log ft, Gamow-Teller matrix element. Comparison with ab initio calculations.
doi: 10.1103/PhysRevLett.108.122502
2012KN02 Phys.Rev. C 86, 035506 (2012) A.Knecht, R.Hong, D.W.Zumwalt, B.G.Delbridge, A.Garcia, P.Muller, H.E.Swanson, I.S.Towner, S.Utsuno, W.Williams, C.Wrede Precision measurement of the 6He half-life and the weak axial current in nuclei RADIOACTIVITY 6He[from 7Li(d, 3He), E=18 MeV](β-); measured Iβ, ββ-coin, T1/2; deduced ft value, Gamow-Teller matrix element. Comparison with ab-initio calculations, and with previous half-life measurements.
doi: 10.1103/PhysRevC.86.035506
2011AT02 Europhys.Lett. 95, 12001 (2011) F.Atchison, B.Blau, K.Bodek, B.van den Brandt, T.Brys, M.Daum, P.Fierlinger, P.Geltenbort, P.Hautle, R.Henneck, S.Heule, A.Holley, M.Kasprzak, K.Kirch, A.Knecht, J.A.Konter, M.Kuzniak, C.-Y.Liu, A.Pichlmaier, C.Plonka, Y.Pokotilovski, A.Saunders, D.Tortorella, M.Wohlmuther, A.R.Young, J.Zejma, G.Zsigmond Production of ultracold neutrons from cryogenic 2H2, O2, and C2H4 converters NUCLEAR REACTIONS 1,2H, C, O(n, n'), E<0.0253 eV; measured En, In, TOF; deduced yields, production rates of ultracold neutrons. Comparison with GEANT4 UCN-Monte Carlo code.
doi: 10.1209/0295-5075/95/12001
2011FR04 Phys.Rev. C 83, 048801 (2011) B.M.Freeman, C.Wrede, B.G.Delbridge, A.Garca, A.Knecht, A.Parikh, A.L.Sallaska Branches of 33S( p, γ )34Cl at oxygen-neon nova temperatures NUCLEAR REACTIONS 33S(p, γ), E=200-710 keV; measured Eγ, Iγ for 432-, 492-, and 529-keV resonances. Deduced stellar reaction rates. Production of sulfur isotopes and 34mCl in novae.
doi: 10.1103/PhysRevC.83.048801
2010AL29 Nucl.Phys. A844, 47c (2010) I.Altarev, G.Ban, G.Bison, K.Bodek, M.Burghoff, Z.Chowdhuri, M.Daum, C.Dusing, M.Fertl, P.Fierlinger, B.Franke, C.Grab, E.Gutsmiedl, G.Hampel, W.Heil, R.Henneck, M.Horras, N.Khomutov, K.Kirch, S.Kistryn, S.Knappe-Gruneberg, A.Knecht, P.Knowles, A.Kozela, A.Kraft, F.Kuchler, J.V.Kratz, T.Lauer, B.Lauss, T.Lefort, Y.Lemiere, A.Mtchedlishvili, O.Naviliat-Cuncic, G.Quemener, S.Paul, A.S.Pazgalev, G.Petzoldt, C.Plonka-Spehr, E.Pierre, G.Pignol, D.Rebreyend, S.Roccia, G.Rogel, P.Schmidt-Wellenburg, A.Schnabel, N.Severijns, Yu.Sobolev, R.Stoepler, A.Weis, N.Wiehl, J.Zejma, J.Zenner, G.Zsigmond An improved measurement of the electric dipole moment of the neutron
doi: 10.1016/j.nuclphysa.2010.05.012
2010AT02 Eur.Phys.J. A 44, 23 (2010) F.Atchison, M.Daum, R.Henneck, S.Heule, M.Horisberger, M.Kasprzak, K.Kirch, A.Knecht, M.Kuzniak, B.Lauss, A.Mtchedlishvili, M.Meier, G.Petzoldt, C.Plonka-Spehr, R.Schelldorfer, U.Straumann, G.Zsigmond Diffuse reflection of ultracold neutrons from low-roughness surfaces
doi: 10.1140/epja/i2010-10926-x
2008AL31 Eur.Phys.J. A 37, 9 (2008) I.Altarev, M.Daum, A.Frei, E.Gutsmiedl, G.Hampel, F.J.Hartmann, W.Heil, A.Knecht, J.V.Kratz, T.Lauer, M.Meier, S.Paul, U.Schmidt, Y.Sobolev, N.Wiehl, G.Zsigmond Neutron velocity distribution from a superthermal solid 2H2 ultracold neutron source NUCLEAR REACTIONS 2H(n, n'), E=thermal; measured ultracold neutron velocity distribution.
doi: 10.1140/epja/i2008-10604-8
2007AT06 Phys.Rev.Lett. 99, 262502 (2007) F.Atchison, B.Blau, K.Bodek, B.van den Brandt, T.Brys, M.Daum, P.Fierlinger, A.Frei, P.Geltenbort, P.Hautle, R.Henneck, S.Heule, A.Holley, M.Kasprzak, K.Kirch, A.Knecht, J.A.Konter, M.Kuzniak, C.-Y.Liu, C.L.Morris, A.Pichlmaier, C.Plonka, Y.Pokotilovski, A.Saunders, Y.Shin, D.Tortorella, M.Wohlmuther, A.R.Young, J.Zejma, G.Zsigmond Cold Neutron Energy Dependent Production of Ultracold Neutrons in Solid Deuterium NUCLEAR REACTIONS 2H(n, n), E=low; measured ultra cold neutron production cross sections.
doi: 10.1103/PhysRevLett.99.262502
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