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Search: Author = R.Engfer

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2006BE30      Eur.Phys.J. C 47, 337 (2006)

W.Bertl, R.Engfer, E.A.Hermes, G.Kurz, T.Kozlowski, J.Kuth, G.Otter, F.Rosenbaum, N.M.Ryskulov, A.van der Schaaf, P.Wintz, I.Zychor, and the SINDRUM II Collaboration

A search for μ-e conversion in muonic gold

NUCLEAR REACTIONS Au(μ-, e), E at rest; measured upper limit for μ → e conversion branching ratio.

ATOMIC PHYSICS Au(μ-, e), E at rest; measured upper limit for μ → e conversion branching ratio.

doi: 10.1140/epjc/s2006-02582-x
Citations: PlumX Metrics


1985KO09      Nucl.Phys. A436, 717 (1985)

T.Kozlowski, W.Bertl, H.P.Povel, U.Sennhauser, H.K.Walter, A.Zglinski, R.Engfer, Ch.Grab, E.A.Hermes, H.P.Isaak, A.Van Der Schaaf, J.Van Der Pluym, W.H.A.Hesselink

Energy Spectra and Asymmetries of Neutrons Emitted after Muon Capture

NUCLEAR REACTIONS O, Si, Ca, Pb(μ-, xn), E at rest; measured E(n), asymmetry parameter a(n)(E), nn-coin.

doi: 10.1016/0375-9474(85)90556-1
Citations: PlumX Metrics


1983HE17      Nucl.Phys. A407, 429 (1983)

P.Heusi, H.P.Isaak, H.S.Pruys, R.Engfer, E.A.Hermes, T.Kozlowski, U.Sennhauser, H.K.Walter

Coincident Emission of Neutrons and Charged Particles after π- Absorption in 6Li, 7Li, 12C, 59Co and 197Au

NUCLEAR REACTIONS 6,7Li, 12C, 59Co, 197Au(π-, 2n), (π-, np), (π-, nd), (π-, nt), E at rest; measured (particle)(particle)-coin, σ(E1, E2, θ); deduced yields. Quasideuteron absorption model.

doi: 10.1016/0375-9474(83)90660-7
Citations: PlumX Metrics


1983IS01      Nucl.Phys. A392, 368 (1983)

H.P.Isaak, A.Zglinski, R.Engfer, R.Hartmann, E.A.Hermes, H.S.Pruys, F.W.Schleputz, T.Kozlowski, U.Sennhauser, H.K.Walter, K.Junker, N.C.Mukhopadhyay

Inclusive Neutron Spectra from the Absorption of Stopped Negative Pions in Heavy Nuclei

NUCLEAR REACTIONS 165Ho, 181Ta, 197Au, Tl, Pb, 209Bi, 238U(π-, xn), E at rest; measured σ(En); deduced multiplicities, nuclear temperatures.

doi: 10.1016/0375-9474(83)90133-1
Citations: PlumX Metrics


1983IS02      Nucl.Phys. A392, 385 (1983)

H.P.Isaak, H.S.Pruys, R.Engfer, E.A.Hermes, F.W.Schleputz, A.Zglinski, T.Kozlowski, U.Sennhauser, H.K.Walter

Inclusive Neutron and Charged Particle Spectra from the Absorption of Stopped Negative Pions in Nickel Isotopes

NUCLEAR REACTIONS 58,60,62,64Ni(π-, xn), (π-, xp), (π-, xd), (π-, xt), (π-, xα), E at rest; measured neutron, charged particle energy spectra; deduced particle multiplicities, nuclear temperatures.

doi: 10.1016/0375-9474(83)90134-3
Citations: PlumX Metrics


1982IS10      Helv.Phys.Acta 55, 477 (1982)

H.P.Isaak, P.Heusi, H.S.Pruys, R.Engfer, E.A.Hermes, T.Kozlowski, U.Sennhauser, H.K.Walter

Single and Coincident Neutron Emission after the Absorption of Stopped Negative Pions in 6Li, 7Li, 12C, 59Co and 197Au

NUCLEAR REACTIONS 7,6Li, 12C, 59Co, 197Au(π-, n), (π-, 2n), (π-, xn), E at rest; measured σ(En), nn-coin; deduced multiplicities, pion absorption mechanism.


1982SE08      Nucl.Phys. A386, 429 (1982)

U.Sennhauser, H.-J.Pfeiffer, H.K.Walter, F.W.Schleputz, H.S.Pruys, R.Engfer, R.Hartmann, E.A.Hermes, P.Heusi, H.P.Isaak, W.H.A.Hesselink

Spectroscopy of Single and Correlated Charged Particles Emitted following Bound Pion Absorption in 6Li and 7Li

NUCLEAR REACTIONS 6,7Li(π-, pX), (π-, dX), (π-, tX), (π-, 2p), (π-, pd), (π-, pt), (π-, 2d), (π-, dt), (π-, 2t), E at rest; measured inclusive σ(Ep), σ(Ed), σ(Et), (particle)(particle)-coin, σ(θ1, θ2); deduced yields, missing mass spectra.

doi: 10.1016/0375-9474(82)90029-X
Citations: PlumX Metrics


1982SE09      Nucl.Phys. A386, 447 (1982)

U.Sennhauser, W.Dey, H.-J.Pfeiffer, H.K.Walter, H.S.Pruys, F.W.Schleputz, R.Engfer, R.Hartmann, E.A.Hermes, P.Heusi, H.P.Isaak, W.H.A.Hesselink

Spectroscopy of Two Coincident Charged Particles Emitted following Bound Pion Absorption in 12C, 59Co and 197Au

NUCLEAR REACTIONS 12C, 59Co, 197Au(π-, 2p), (π-, pd), (π-, pt), (π-, p3He), (π-, pα), (π-, 2d), (π-, dt), (π-, d3He), (π-, dα), (π-, 2t), (π-, t3He), (π-, tα), (π-, 2α), E at rest; measured (particle)(particle)-coin, σ(θ1, θ2); deduced yields, missing mass spectra. Pair absorption model, final state interactions.

doi: 10.1016/0375-9474(82)90030-6
Citations: PlumX Metrics


1981HE18      Helv.Phys.Acta 53, 649 (1981)

P.Heusi, R.Engfer, E.A.Hermes, H.P.Isaak, H.S.Pruys, F.W.Schleputz, A.Zglinski, T.Kozlowski, U.Sennhauser, H.K.Walter

Coincident Emission of Neutrons and Charged Particles following Negative Pion Capture in 12C

NUCLEAR REACTIONS 12C(π-, np), (π-, nd), (π-, nt), E at rest; measured np-, nd-, nt-coin; deduced neutron-proton, proton-proton pair absorption ratio.


1981PR02      Nucl.Phys. A352, 388 (1981)

H.S.Pruys, R.Engfer, R.Hartmann, E.A.Hermes, H.P.Isaak, F.W.Schlepuetz, U.Sennhauser, W.Dey, K.Hess, H.-J.Pfeiffer, H.K.Walter, W.Hesselink

Charged Particle Emission following the Absorption of Stopped π- in 12C, 59Co and 197Au

NUCLEAR REACTIONS 12C, 59Co, 197Au(π-, p), (π-, d), (π-, t), (π-,3He), (π-, α), E at rest; measured σ(Ep), σ(Ed), σ(Et), σ(E(3He)), σ(Eα). Quasideuteron pion absorption model.

doi: 10.1016/0375-9474(81)90418-8
Citations: PlumX Metrics


1981SE11      Phys.Lett. 103B, 409 (1981)

U.Sennhauser, L.Felawka, T.Kozlowski, H.K.Walter, F.W.Schlepuetz, R.Engfer, E.A.Hermes, P.Heusi, H.P.Isaak, H.S.Pruys, A.Zglinski, W.H.A.Hesselink

Observation of Particle Unstable 4H in Pion Absorption in 7Li

NUCLEAR REACTIONS 7Li(π-, 2t), E at rest; measured σ(E1, E2); 4H deduced level, reduced width.

doi: 10.1016/0370-2693(81)90071-X
Citations: PlumX Metrics


1979CH09      Nucl.Phys. A316, 290 (1979)

D.Chultem, V.S.Evseev, V.M.Sidorov, V.A.Khalkin, R.Engfer, H.H.Muller, H.K.Walter

Search for 4n in π- Double Charge Exchange Reactions with Heavy Nuclei

NUCLEAR REACTIONS 208Pb(π-,4n), E=120 MeV; 208Pb(4n, X); measured σ(Eα) for 212Bi from 212Pb decay; deduced upper limit for processes.

doi: 10.1016/0375-9474(79)90038-1
Citations: PlumX Metrics


1979PR02      Nucl.Phys. A316, 365 (1979)

H.S.Pruys, R.Engfer, R.Hartmann, U.Sennhauser, H.-J.Pfeiffer, H.K.Walter, J.Morgenstern, A.Wyttenbach, E.Gadioli, E.Gadioli-Erba

Absorption of Stopped π- in 59Co, 75As, 197Au and 209Bi Investigated by in-Beam and Activation γ-Ray Spectroscopy

NUCLEAR REACTIONS 59Co, 75As, 197Au, 209Bi(π-, xnyp), E=0 MeV; measured Eγ, Iγ, E(X-ray), I(X-ray); deduced production σ, high spin states.

doi: 10.1016/0375-9474(79)90043-5
Citations: PlumX Metrics


1978DE30      Helv.Phys.Acta 51, 87 (1978)

W.Dey, H.J.Pfeiffer, U.Sennhauser, H.K.Walter, R.Engfer, R.Hartmann, E.A.Hermes, H.P.Isaak, H.S.Pruys, F.W.Schleputz

Charged Particle Emission Following Negative Pion Absorption in Nuclei

NUCLEAR REACTIONS 12C, 59Co, 197Au(π-, p), 12C, 59Co, 197Au(π-, d), 12C, 59Co, 197Au(π-, t), 12C, 59Co, 197Au(π-,3He), 12C, 59Co, 197Au(π-, α), 12C(π-,6Li), E=0; measured σ.


1978HA37      Nucl.Phys. A308, 345 (1978)

R.Hartmann, H.P.Isaak, R.Engfer, E.A.Hermes, H.S.Pruys, W.Dey, H.J.Pfeiffer, U.Sennhauser, H.K.Walter, J.Morgenstern

Spectroscopy of Single and Correlated Neutrons Following Pion Absorption in 12C, 59Co and 197Au

NUCLEAR REACTIONS 12C, 59Co, 197Au(π-, xn), E at rest; measured neutron energy spectrum, n-n correlation; deduced neutron multiplicities, nuclear temperature.

doi: 10.1016/0375-9474(78)90556-0
Citations: PlumX Metrics


1977LI20      Hyperfine Interactions 3, 381 (1977)

R.Link, H.Backe, R.Engfer, E.Kankeleit, H.K.Walter

Magnetic Hyperfile Anomaly in Muonic 193Ir

NUCLEAR MOMENTS, Mesic-Atoms 193Ir; measured muonic hyperfine splitting; deduced hfs anomaly.

doi: 10.1007/BF01021570
Citations: PlumX Metrics


1977PR03      Helv.Phys.Acta 50, 199 (1977)

H.S.Pruys, R.Hartmann, R.Engfer, U.Sennhauser, W.Dey, H.-J. Pfeiffer, H.K.Walter, J.Morgenstern, A.Wyttenbach

Absorption of Stopped π- in 75As and 197Au

NUCLEAR REACTIONS 75As, 197Au(π-, X), E=0 MeV; measured prompt γ, X-ray spectra.


1976DE39      Helv.Phys.Acta 49, 778 (1976)

W.Dey, H.P.Isaak, H.K.Walter, R.Engfer, H.Guyer, R.Hartmann, E.A.Hermes, H.Muller, H.S.Pruys, W.Reichart, J.Morgenstern

Measurement of Neutrons and Charged Particles Following π- Absorption in Nuclei

NUCLEAR REACTIONS 12C, 181Ta, 197Au(π-, p), (π-, d), (π-, t), (π-, n), (π-,3He), (π-, α), E=0 MeV; measured spectra.


1975FR09      Phys.Lett. 55B, 377 (1975)

W.D.Fromm, D.Gansorig, T.Korgulski, H.-G.Ortlepp, S.M.Polikanov, B.M.Sabirov, U.Schmidt, R.Arlt, R.Engfer, H.Schneuwly

Energy Shifts of Electronic X-Rays in Heavy Muonic Atoms

ATOMIC PHYSICS, Mesic-Atoms Ta, Ir, Pb, Th, U(μ-, X-ray); measured energy shifts of K X-rays.

doi: 10.1016/0370-2693(75)90363-9
Citations: PlumX Metrics


1975ZE04      Nucl.Phys. A254, 315 (1975)

A.Zehnder, F.Boehm, W.Dey, R.Engfer, H.K.Walter, J.L.Vuilleumier

Charge Parameters, Isotope Shifts, Quadrupole Moments, and Nuclear Excitation in Muonic 170-174,176Yb

NUCLEAR REACTIONS 170,171,172,173,174,176Yb(μ-, X-ray); measured muonic X-rays, Eγ, γγ-coin. 170,171,172,173,174,176Yb deduced nuclear charge distribution, quadrupole moment, isotope shift, isomer shift. 172Yb deduced levels.

doi: 10.1016/0375-9474(75)90219-5
Citations: PlumX Metrics


1974BA77      Nucl.Phys. A234, 469 (1974)

H.Backe, R.Engfer, E.Kankeleit, R.Link, R.Michaelsen, C.Petitjean, L.Schellenberg, H.Schneuwly, W.U.Schroder, J.L.Vuilleumier, H.K.Walter, A.Zehnder

Nuclear Excitation and Isomer Shifts in Muonic Atoms (I). Experiment and Evaluation

ATOMIC PHYSICS, Mesic-Atoms 152Sm, 156,158,160Gd, 153Eu, 169Tm, 170Yb, 181Ta, 182,184,186W, 185,187Re, 188,190,192Os, 191,193Ir, 194,196Pt, 198,199,200,202Hg, 203,205Tl, 209Bi; measured Eγ, Iγ of muonic isotopes; deduced muonic isomer shifts.

doi: 10.1016/0375-9474(74)90576-4
Citations: PlumX Metrics


1974DU02      Nucl.Phys. A219, 29 (1974)

T.Dubler, L.Schellenberg, H.Schneuwly, R.Engfer, J.L.Vuilleumier, H.K.Walter, A.Zehnder, B.Fricke

Nuclear Charge Radii from X-Ray Transitions in Muonic Atoms of Carbon, Nitrogen and Oxygen

ATOMIC PHYSICS, Mesic-Atoms 12C, 14N, 16O, 103Rh(μ, 2nν), E approx 0, measured muonic X-rays, Eγ. 12C, 14N, 16O deduced nuclear charge radius. 101Ru deduced transitions.

doi: 10.1016/0375-9474(74)90080-3
Citations: PlumX Metrics


1974EN08      Fiz.Elem.Chastits At.Yadra 5, 382 (1974); Sov.J.Particles Nucl. 5, 152 (1974)

R.Engfer, H.-K.Walter, H.Schneuwly

Study of the Properties of Atomic Nuclei with the Aid of Muonic Atoms

NUCLEAR STRUCTURE, Mesic-Atoms 93Nb, 115In, 127I, 133Cs, 139La, 141Pr, 151Eu, 190,192Os, 199,200Hg, 203,205Tl, 209Bi; calculated hyperfine splitting constants. 150Nd, 152Sm, 154,156,158,160Gd, 166Er, 170Yb, 182,184,186W, 188,190,192Os, 194,196Pt, 198,199,200,202Hg, 153Eu, 169Tm, 181Ta, 185,187Re, 191,193Ir, 203,205Tl; calculated muonic excitation probabilities.


1974EN10      At.Data Nucl.Data Tables 14, 509 (1974)

R.Engfer, H.Schneuwly, J.L.Vuilleumier, H.K.Walter, A.Zehnder

Charge-Distribution Parameters, Isotope Shifts, Isomer Shifts, and Magnetic Hyperfine Constants from Muonic Atoms

COMPILATION, Mesic-Atoms Z=2-83; compiled nuclear charge-distribution parameters, isotope, isomer shifts; magnetic hf constants from muonic atoms.

doi: 10.1016/S0092-640X(74)80003-3
Citations: PlumX Metrics


1974SC12      Z.Phys. 268, 57 (1974)

W.U.Schroder, U.Jahnke, K.H.Lindenberger, G.Roschert, R.Engfer, H.K.Walter

Spectra of Neutrons from μ Capture in Thallium, Lead and Bismuth

NUCLEAR REACTIONS Tl, Pb, Bi(μ, xn); measured σ(En, Eγ), deduced reaction mechanism.


1972BA53      Nucl.Phys. A189, 472 (1972)

H.Backe, R.Engfer, U.Jahnke, E.Kankeleit, R.M.Pearce, C.Petitjean, L.Schellenberg, H.Schneuwly, W.U.Schroder, H.K.Walter, A.Zehnder

Study of X-Rays and Nuclear γ-Rays in Muonic Thallium

ATOMIC PHYSICS, Mesic-Atoms 203Tl, 205Tl; measured E(X-ray), I(X-ray), Eγ, Iγ; deduced μ-cascade, electron screening, excitation of first, higher nuclear levels, magnetic H.F. Anomalies, muonic isomer shift, E2/M1 mixing ratio, T1/2 of nuclear 3/2+ level in muonic 205Tl, magnetic, electric nuclear polarization, isotope shift, nuclear size parameters, isotope effect of μ-capture rates.

NUCLEAR REACTIONS 203,205Tl(μ-, xnγ); measured Eγ, Iγ; deduced total muon capture rate. 198, 199, 200, 202, 204hg deduced transitions.

doi: 10.1016/0375-9474(72)90309-0
Citations: PlumX Metrics


1972LI33      Phys.Lett. 42B, 57 (1972)

R.Link, L.Schellenberg, H.Backe, R.Engfer, E.Kankeleit, R.Michaelsen, H.Schneuwly, W.U.Schroder, J.L.Vuilleumier, H.K.Walter, A.Zehnder

Magnetic Hyperfine Interaction of the 2+ Rotational States in Muonic 190,192Os

NUCLEAR REACTIONS Os(μ-, Xγ), E approx 0; measured I(X-ray), Iγ. 190,192Os nuclear transitions deduced magnetic hfs splitting.

doi: 10.1016/0370-2693(72)90715-0
Citations: PlumX Metrics


1972SC37      Nucl.Phys. A196, 452 (1972)

H.Schneuwly, L.Schellenberg, H.Backe, R.Engfer, U.Jahnke, E.Kankeleit, K.H.Lindenberger, R.M.Pearce, C.Petitjean, W.U.Schroder, H.K.Walter, A.Zehnder

Observation of Electric Quadrupole X-Ray Transitions in Muonic Thallium, Lead and Bismuth

ATOMIC PHYSICS, Mesic-Atoms Tl, Pb, Bi; measured μ-mesic E(X-ray), I(X-ray); deduced E2 transitions, μ-cascade, radiationless transitions, population ratios.

doi: 10.1016/0375-9474(72)90788-9
Citations: PlumX Metrics


1972WA02      Phys.Lett. 38B, 64 (1972)

H.K.Walter, H.Backe, R.Engfer, E.Kankeleit, C.Petitjean, H.Schneuwly, W.U.Schroder

Muonic Isomer Shifts in 153Eu. A Re-Evaluation of Mossbauer Isomer Shifts in Rare Earths

ATOMIC PHYSICS, Mesic-Atoms 153Eu; measured Eγ; deduced isomer shift.

doi: 10.1016/0370-2693(72)90739-3
Citations: PlumX Metrics


1972WA17      Phys.Lett. 40B, 197 (1972)

H.K.Walter, J.H.Vuilleumier, H.Backe, F.Boehm, R.Engfer, H.von Gunten, R.Link, R.Michaelsen, C.Petitjean, L.Schellenberg, H.Schneuwly, W.U.Schroder, A.Zehnder

Test of Quantum-Electrodynamical Corrections in Muonic Atoms

ATOMIC PHYSICS, Mesic-Atoms Hg, 203Tl; measured μ-mesic E(X-ray), I(X-ray); tested QED corrections.

doi: 10.1016/0370-2693(72)90408-X
Citations: PlumX Metrics


1971LI29      Phys.Lett. 37B, 50 (1971)

R.Link, H.Backe, R.Engfer, L.Fluri, R.Michaelsen, C.Petitjean, H.Schneuwly, H.K.Walter

Magnetic Hyperfine Splitting of the 2s1/2-2p1/2 Transition in Muonic 115In

ATOMIC PHYSICS, Mesic-Atoms 115In; measured μ-mesic E(X-ray), I(X-ray), Eγ, Iγ; deduced a.

NUCLEAR MOMENTS 115In μ-mesic atom; measured a.

doi: 10.1016/0370-2693(71)90567-3
Citations: PlumX Metrics


1971PE14      Nucl.Phys. A178, 193 (1971)

C.Petitjean, H.Backe, R.Engfer, U.Jahnke, K.H.Lindenberger, H.Schneuwly, W.U.Schroder, H.K.Walter

Muon Capture in 151Eu and 153Eu

NUCLEAR REACTIONS 151Eu, 153Eu(μ-, νxnγ) ; measured Eγ, Iγ, tauμ; deduced neutron multiplicity, isotope effect in μ-capture rates. 147,148,149,150,151,152,153Sm deduced transitions.

doi: 10.1016/0375-9474(71)90197-7
Citations: PlumX Metrics


1970BA74      Proc.Int.Conf.High Energy Phys.Nucl.Struct., 3rd, Columbia University, New York (1969), S.Devons, Ed., Plenum Press, New York, p.192 (1970)

H.Backe, R.Engfer, E.Kankeleit, W.U.Schroder, H.K.Walter, K.Wien

Measurements of Excitation Probabilities and Isomer Shifts of Nuclear Levels in μ-Atoms

NUCLEAR REACTIONS 182,184,186W, 188,190,192Os, 191,193Ir, 203,205Tl, 169Tm, 185,187Re, 194,196Pt(μ-, γ); measured excitation probability, isomer shift.


1968BA36      Phys.Letters 27B, 425 (1968)

R.Baader, H.Backe, R.Engfer, K.Hesse, E.Kankeleit, U.Schroder, H.K.Walter, K.Wien

Muonic Isomer Shift Measurements in Sm, W and Os Isotopes and Their Interpretation in Terms of Changes in Nuclear Charge Distribution

ATOMIC PHYSICS, Mesic-Atoms Sm, W, Os(μ-, γ), E=0; measured Eγ. 152Sm, 182,184,186W, 188,190,192Os levels deduced muonic isomer shift.

doi: 10.1016/0370-2693(68)90226-8
Citations: PlumX Metrics


1968BA37      Phys.Letters 27B, 428 (1968)

R.Baader, H.Backe, R.Engfer, E.Kankeleit, W.U.Schroder, H.Walter, K.Wien

Measurement of the Magnetic Hyperfine Splitting of Nuclear γ Rays in Muonic Thallium

ATOMIC PHYSICS, Mesic-Atoms Tl(μ-, γ), E=0; measured Eγ. 203,205Tl deduced ground-state muonic hfs. Natural target.

doi: 10.1016/0370-2693(68)90227-X
Citations: PlumX Metrics


1968EN02      Z.Physik 216, 274 (1968)

R.Engfer, F.Scheck

Shell Model Analysis of the Magnetic Hyperfine Splitting in Muonic Thallium

doi: 10.1007/BF01392967
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