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NSR database version of April 29, 2024.

Search: Author = B.Jeckelmann

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1994JE10      Phys.Lett. 335B, 326 (1994)

B.Jeckelmann, P.F.A.Goudsmit, H.J.Leisi

The Mass of the Negative Pion

NUCLEAR REACTIONS ²⁴Mg(π^-, X), E at rest; measured K X-ray transition probabilities; deduced m(π), m(ν(μ)).

ATOMIC PHYSICS, Mesic-Atoms ²⁴Mg(π^-, X), E at rest; measured K X-ray transition probabilities; deduced m(π), m(ν(μ)).

doi: 10.1016/0370-2693(94)90358-1
Citations: PlumX Metrics

1987GI01      Phys.Lett. 186B, 9 (1987)

K.L.Giovanetti, G.de Chambrier, P.F.A.Goudsmit, H.J.Leisi, B.Jeckelmann, Th.Karapiperis

The Isoscalar Pion-Nucleus Interaction from Pionic Atoms

ATOMIC PHYSICS, Mesic-Atoms ⁴He, ¹²C, ¹⁶O, ²⁰Ne; analyzed pionic atom data; deduced improved optical potential.

doi: 10.1016/0370-2693(87)90503-X
Citations: PlumX Metrics

1986GO04      Helv.Phys.Acta 59, 186 (1986)

P.F.A.Goudsmit, G.de Chambrier, K.l.Giovanetti, B.Jeckelmann, H.J.Leisi, A.Ruetschi

Anomaly in Pion Absorption

ATOMIC PHYSICS, Mesic-Atoms Z=2-14; analyzed pionic atom data. Improved optical model.

1986JE02      Nucl.Phys. A457, 709 (1986)

B.Jeckelmann, W.Beer, G.De Chambrier, O.Elsenhans, K.L.Giovanetti, P.F.A.Goudsmit, H.J.Leisi, T.Nakada, O.Piller, A.Ruetschi, W.Schwitz

New Precision Determination of the π^- Mass from Pionic X-Rays

ATOMIC PHYSICS, Mesic-Atoms ²⁴Mg; measured pionic transition wavelength, X-rays; deduced π^- mass, limit on muon-neutrino mass, electronic K-shell population.

doi: 10.1016/0375-9474(86)90476-8
Citations: PlumX Metrics

1986JE03      Helv.Phys.Acta 59, 1184 (1986)

B.Jeckelmann, W.Beer, G.de Chambrier, O.Elsenhans, K.L.Giovanetti, P.F.A.Goudsmit, H.J.Leisi, T.Nakada, O.Piller, W.Schwitz

Neue Prazisionsmessung der π^--Masse

ATOMIC PHYSICS, Mesic-Atoms ²⁴Mg(π^-, X), E not given; measured pionic X-rays; deduced pion mass.

1985BE53      Nucl.Instrum.Methods 238, 365 (1985)

W.Beer, K.Bos, G.De Chambrier, K.L.Giovanetti, P.F.A.Goudsmit, B.V.Grigoryev, B.Jeckelmann, L.Knecht, L.N.Kondurova, J.Langhans, H.J.Leisi, P.M.Levchenko, V.I.Marushenko, A.F.Mezentsev, H.Obermeier, A.A.Petrunin, U.Rohrer, A.G.Sergeev, S.G.Skornjakov, A.I.Smirnov, E.Steiner, G.Strassner, V.M.Suvorov, A.Vacchi

Crystal Spectrometer for Measurements of Pionic X-Rays

NUCLEAR REACTIONS ^24,25,26Mg, Si, ³⁰Si, O, C(π, X), E at rest; measured pionic X-rays. Bent crystal spectrometer, high precision laser interferometer system.

ATOMIC PHYSICS, Mesic-Atoms Mg, Si, C, O; measured pionic X-rays; deduced wave length ratios. Bent crystal spectrometer, high precision laser interferometer system.

doi: 10.1016/0168-9002(85)90474-7
Citations: PlumX Metrics

1985DE34      Nucl.Phys. A442, 637 (1985)

G.de Chambrier, W.Beer, F.W.N.de Boer, K.Bos, A.I.Egorov, M.Eckhause, K.L.Giovanetti, P.F.A.Goudsmit, B.Jeckelmann, K.E.Kiryanov, L.N.Kondurova, L.Lapina, H.J.Leisi, V.I.Marushenko, A.F.Mezentsev, A.A.Petrunin, A.G.Sergeev, A.I.Smirnov, G.Strassner, V.M.Suvorov, A.Vacchi, D.Wieser

Precision Measurement of the Wavelengths and Natural Line of 3d-2p Pionic X-ray Transitions in Low-Z Atoms

ATOMIC PHYSICS, Mesic-Atoms ¹²C, ^16,18O, ^24,26Mg, ^28,30Si; measured pionic transmission wave lengths, X-rays; deduced 2p state strong interaction shifts, widths.

doi: 10.1016/0375-9474(85)90370-7
Citations: PlumX Metrics

1985DE42      Nucl.Phys. A444, 589 (1985)

F.W.N.De Boer, B.Aas, P.Baertschi, W.Beer, I.Beltrami, K.Bos, P.F.A.Goudsmit, U.Kiebele, B.Jeckelmann, H.J.Leisi, W.Ruckstuhl, G.Strassner, A.Vacchi, R.Weber

Precision Measurement of the 2p-1s Transition Wavelength in Muonic ¹³C

ATOMIC PHYSICS, Mesic-Atoms ¹³C; measured muonic X-rays, transition wavelength; deduced muon-nucleon interaction limits, ^12,13C isotope shift. ¹³C deduced rms charge radius. Bent crystal spectrometer.

NUCLEAR REACTIONS ¹³C(μ^-, X), E at rest; measured X-rays; deduced muon-nucleon interaction limits, ^12,13C isotope shift. ¹³C deduced rms charge radius. Bent crystal spectrometer.

doi: 10.1016/0375-9474(85)90106-X
Citations: PlumX Metrics

1985JE05      Nucl.Instrum.Methods 241, 191 (1985)

B.Jeckelmann, W.Beer, G.De Chambrier, O.Elsenhans, K.L.Giovanetti, P.F.A.Goudsmit, H.J.Leisi, A.Ruetschi

A New Determination of the 25.7 keV Wavelength Standard in the Decay of ¹⁶¹Tb

RADIOACTIVITY ¹⁶¹Tb(β^-) [from ¹⁶⁰Gd(n, γ)¹⁶¹Gd(β^--decay)]; ¹⁷⁰Tm(β^-) [from ¹⁶⁹Tm(n, γ), E=thermal]; ¹⁸²Ta(β^-) [from ¹⁸¹Ta(n, γ), E=thermal]; measured Eγ, Iγ; deduced 25.7 keV wavelength standard. ¹⁶¹Dy, ¹⁸²W deduced transition energy. High precision crystal spectrometer.

doi: 10.1016/0168-9002(85)90532-7
Citations: PlumX Metrics

1985RU01      Nucl.Phys. A433, 634 (1985)

W.Ruckstuhl, B.Aas, W.Beer, I.Beltrami, K.Bos, G.De Chambrier, P.F.A.Goudsmit, H.J.Leisi, G.Strassner, A.Vacchi, J.M.Van Der Velden, B.Jeckelmann, U.Kiebele, R.Weber

Measurement of the Hyperfine Splitting of the 1s State in Muonic ⁷Li as a Search for Axial-Vector Muon-Nucleon Interactions

ATOMIC PHYSICS, Mesic-Atoms ⁷Li; measured muonic hfs; deduced 2p-1s transition strength. High precision bent crystal spectrometer.

NUCLEAR MOMENTS ⁷Li; measured muonic hfs; deduced axial vector boson mediated muon-nucleon interaction strength upper limit. High precision bent crystal spectrometer.

doi: 10.1016/0375-9474(85)90022-3
Citations: PlumX Metrics

1983JE09      Nucl.Phys. A408, 495 (1983)

B.Jeckelmann, W.Beer, I.Beltrami, F.W.N.De Boer, G.De Chambrier, P.F.A.Goudsmit, J.Kern, H.J.Leisi, W.Ruckstuhl, A.Vacchi

Spectroscopic Quadrupole Moment of ²³Na from Muonic X-Rays

NUCLEAR REACTIONS ²³Na(μ^-, X), E at rest; measured X-ray spectra. ²³Na deduced quadrupole moment.

ATOMIC PHYSICS, Mesic-atoms ²³Na(μ^-, X), E at rest; measured X-ray spectra. ²³Na deduced quadrupole moment.

doi: 10.1016/0375-9474(83)90242-7
Citations: PlumX Metrics

1982WE04      Nucl.Phys. A377, 361 (1982)

R.Weber, B.Jeckelmann, J.Kern, U.Kiebele, B.Aas, W.Beer, I.Beltrami, K.Bos, G.De Chambrier, P.F.A.Goudsmit, H.J.Leisi, W.Ruckstuhl, G.Strassner, A.Vacchi

Spectroscopic Quadrupole Moments of ²⁵Mg and ²⁷Al from Muonic X-Rays

NUCLEAR MOMENTS ²⁵Mg, ²⁷Al; measured muonic X-rays, hfs; deduced electric field gradient, Sternheimer factor. ²⁵Mg, ²⁷Al deduced spectroscopic quadrupole moment. Nuclear rotational model, strong-coupling limit.

doi: 10.1016/0375-9474(82)90046-X
Citations: PlumX Metrics

1981JE02      Helv.Phys.Acta 54, 321 (1981)

B.Jeckelmann, J.Kern, U.Kiebele, J.-A.Pinston, R.Weber, B.Aas, W.Beer, I.Beltrami, K.Bos, G.deChambrier, P.F.A.Goudsmit, Th.V.Ledebur, H.J.Leisi, W.Ruckstuhl, G.Strassner, A.Vacchi

Spektroskopische Quadrupolmomente von ²⁵Mg und ²⁷Al aus Muonischen X-Ray Ubergangen

NUCLEAR MOMENTS ²⁵Mg, ²⁷Al; measured hfs, muonic X-rays; deduced spectroscopic quadrupole moments.