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Search: Author = M.Uhrmacher

Found 42 matches.

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1998AL29      Phys.Rev. B58, 11303 (1998)

L.Aldon, M.Uhrmacher, C.Branci, L.Ziegeler, J.Roth, P.Schaaf, H.Metzner, J.Olivier-Fourcade, J.C.Jumas

Perturbed Angular Correlation Study of the Thiospinel β-In2S3

RADIOACTIVITY 111In(EC); measured γγ(θ, H, t); deduced hyperfine parameters in β-In2S3.

doi: 10.1103/PhysRevB.58.11303
Citations: PlumX Metrics


1996AT04      Phys.Rev. B53, 600 (1996)

R.N.Attili, M.Uhrmacher, K.P.Lieb, L.Ziegeler, M.Mekata, E.Schwarzmann

Electric Field Gradients at 111Cd in Delafossite Oxides ABO2(A = Ag, Cu; B = Al, Cr, Fe, In, Nd, Y)

RADIOACTIVITY 111In(EC); measured γγ(θ, H); deduced 111Cd electric field gradients in delafossite oxides ABO2(A=Ag, Cu;B=Al, Cr, Fe, In, Nd, Y).

doi: 10.1103/PhysRevB.53.600
Citations: PlumX Metrics


1995NE07      Europhys.Lett. 29, 175 (1995)

M.Neubauer, A.Bartos, K.P.Lieb, D.Lupascu, M.Uhrmacher, Th.Wenzel

Dynamic Hyperfine Interaction in Cr2O3 Observed via PAC

RADIOACTIVITY 111In(EC); measured γγ(θ, H) vs temperature; deduced electric field gradients, dynamic hyperfine interaction in Cr2O3 implanted with 111In(EC)111Cd probes related features.

doi: 10.1209/0295-5075/29/2/012
Citations: PlumX Metrics


1994LI50      Nucl.Instrum.Methods Phys.Res. B89, 277 (1994)

K.-P.Lieb, W.Bolse, M.Uhrmacher

Ion Beam Mixing in Metal/Metal and Nitride/Metal Layers - New Perspectives

RADIOACTIVITY 111In(EC); analyzed γγ(θ, H) in doped Sb/Ni, Ni/Al, Ni/Ti multi-layer stack; deduced ion-beam induced phase formation features.

doi: 10.1016/0168-583X(94)95188-8
Citations: PlumX Metrics


1994LU16      J.Phys.Condens.Matter 6, 10445 (1994)

D.Lupascu, M.Uhrmacher, K.P.Lieb

Electric Field Gradients of 111Cd in Monoclinic (B-Phase) Rare Earth Sesquioxides

RADIOACTIVITY 111In(EC); measured γγ(θ, H, t); deduced 111Cd electric field gradients in B-phase monoclinic Sm2O3, Eu2O3, Gd2O3.

doi: 10.1088/0953-8984/6/48/006
Citations: PlumX Metrics


1993AL28      Hyperfine Interactions 79, 851 (1993)

J.Albohn, J.Markl, M.Uhrmacher, A.Bartos

PAC-Experiments in Electron-Doped HTSC: Nd(2-x)Ce(x)CuO4

RADIOACTIVITY 111In(EC); measured γγ(θ, H); deduced electron-doped HTSC samples characteristics.

doi: 10.1007/BF00567616
Citations: PlumX Metrics


1993BA70      Nucl.Instrum.Methods Phys.Res. A330, 132 (1993)

A.Bartos, K.Schemmerling, Th.Wenzel, M.Uhrmacher

A Compact TDPAC Spectrometer

RADIOACTIVITY 60Co(EC), (β+); measured γγ-coin. 137Cs(β-); measured Eγ, Iγ. 111In(EC); measured γγ(θ, H, t). Compact TDPAC spectrometer.

doi: 10.1016/0168-9002(93)91314-D
Citations: PlumX Metrics


1993BA73      Phys.Rev. B48, 7478 (1993)

A.Bartos, M.Uhrmacher

Perturbed-Angular-Correlation Experiments with 111In in MBa2Cu3O(7-δ) (M = Y, Yb): The Cu(1)-site puzzle

RADIOACTIVITY 111In(EC); measured γγ(θ, H, t); deduced electric field gradients, hyperfine interactions origin. Source implanted into YbBa2Cu3O(7-δ).

doi: 10.1103/PhysRevB.48.7478
Citations: PlumX Metrics


1993BA81      Hyperfine Interactions 80, 953 (1993)

A.Bartos, D.Wiarda, M.Uhrmacher, K.P.Lieb

Monitoring Positional Changes in Bixbyite Oxides with Perturbed Angular Correlation Spectroscopy

NUCLEAR STRUCTURE 111Cd; analyzed γγ(θ, H) data; deduced electric field gradient variation for 111Cd located at substitutional sites, M2O3 isostructural sesquioxides, M=Sc, In, Yb, Dy, Y, Ho, Gd, Sm.

doi: 10.1007/BF00567446
Citations: PlumX Metrics


1993LU18      Hyperfine Interactions 80, 959 (1993)

D.Lupascu, J.Albohn, J.Shitu, A.Bartos, K.Krolas, M.Uhrmacher, K.P.Lieb

Electric Field Gradients of 111Cd in the Hexagonal (A-Phase)La2O3 and Nd2O3 Sesquioxides

RADIOACTIVITY 111In(EC); measured γγ(θ, H); deduced 111Cd electric field gradients in hexagonal A-phase La2O3, Nd2O3.

doi: 10.1007/BF00567447
Citations: PlumX Metrics


1993NA20      Hyperfine Interactions 80, 965 (1993)

V.Naicker, A.Bartos, K.P.Lieb, M.Uhrmacher, T.Wenzel, D.Wiarda

The Electric Field Gradient at 111Cd in Vanadium Oxides

RADIOACTIVITY 111In(EC); measured γγ(θ, H, t); deduced 111Cd electric field gradient in polycrystalline V2O5.

doi: 10.1007/BF00567448
Citations: PlumX Metrics


1993PA28      Phys.Rev. B48, 10052 (1993)

A.F.Pasquevich, M.Uhrmacher, L.Ziegeler, K.P.Lieb

Hyperfine Interactions of 111Cd in Ga2O3

RADIOACTIVITY 111In(EC); measured γγ(θ, H, t); deduced quadrupole hyperfine interactions for 111Cd in Ga2O3. Amorphous, polycrystalline powder samples.

doi: 10.1103/PhysRevB.48.10052
Citations: PlumX Metrics


1993WI27      J.Phys.Condens.Matter 5, 4111 (1993)

D.Wiarda, M.Uhrmacher, A.Bartos, K.P.Lieb

Electric Field Gradients at 111Cd in Binary Oxides

RADIOACTIVITY 111In(EC); measured γγ(θ, H); deduced 111Cd electric field gradients at substitutional sites.

doi: 10.1088/0953-8984/5/25/002
Citations: PlumX Metrics


1992UH01      Nucl.Instrum.Methods Phys.Res. B68, 175 (1992)

M.Uhrmacher, K.P.Lieb

Sodium Diffusion in Metals Observed by the 23Na(p, γ) Reaction

NUCLEAR REACTIONS 23Na(p, γ), E ≈ 309 keV; measured Eγ, Iγ; deduced sodium diffusion in host metals. Supersaturated Na solutions, polycrystalline Al, Cr, Fe, Mo, Ni, Ta.

doi: 10.1016/0168-583X(92)96073-8
Citations: PlumX Metrics


1992WE07      Ann.Phys.(Leipzig) 1, 155 (1992)

Th.Wenzel, A.Bartos, K.P.Lieb, M.Uhrmacher, D.Wiarda

Hyperfine Interactions of 111Cd in TiO2 (Rutile) Studied by Perturbed Angular Correlations

RADIOACTIVITY 111In(EC); measured γγ(θ, H, t); deduced 111Cd electric field gradient, quadrupole coupling constant, asymmetry parameter.Source implantation into polycrystalline TiO2.

doi: 10.1002/andp.19925040302
Citations: PlumX Metrics


1991BA52      Phys.Lett. 157A, 513 (1991)

A.Bartos, K.P.Lieb, A.F.Pasquevich, M.Uhrmacher, and the ISOLDE Collaboration

Scaling of the Electric Field Gradient of 111Cd Impurities in the Bixbyite Oxides of Y, Sc, Dy and Yb

RADIOACTIVITY 111In(EC); measured γγ(θ, H); deduced 111Cd quadrupole hyperfine interaction in cubic C-form sesquioxides of Sc, Y, Dy, Yb.

doi: 10.1016/0375-9601(91)91029-D
Citations: PlumX Metrics


1991RE09      J.Phys.Condens.Matter 3, 3625 (1991)

M.Renteria, A.G.Bibiloni, M.S.Moreno, J.Desimoni, R.C.Mercader, A.Bartos, M.Uhrmacher, K.P.Lieb

Hyperfine Interactions of 111In-Implanted Tin Oxide Thin Films

RADIOACTIVITY 111In; measured γγ(θ, H); deduced 111In hyperfine interaction in tin oxides. Conversion electron Mossbauer spectroscopy.

doi: 10.1088/0953-8984/3/20/023
Citations: PlumX Metrics


1990KE07      Hyperfine Interactions 59, 309 (1990)

J.Kesten, M.Uhrmacher, K.P.Lieb

Hyperfine Interaction of 111Cd Impurities in Cr2O3

RADIOACTIVITY 111In(EC); measured γγ(θ, H); deduced 111Cd impurities hyperfine interaction.

doi: 10.1007/BF02401235
Citations: PlumX Metrics


1989BA74      Phys.Lett. 142A, 181 (1989)

A.Bartos, M.Uhrmacher, H.U.Krebs

EFG of 111Cd at the Cu1-Site in YBa2Cu3O7 and in YBa2Cu3O6 Measured with PAC-Technique

RADIOACTIVITY 111In(EC); measured γγ(θ, H); deduced 111Cd electric field gradient.

doi: 10.1016/0375-9601(89)90184-9
Citations: PlumX Metrics


1988BA33      Phys.Lett. 130A, 177 (1988)

A.Bartos, W.Bolse, K.P.Lieb, M.Uhrmacher

Electric Field Gradients of 111Cd in the Copper Oxides CuO and Cu2O

RADIOACTIVITY 111In(EC); measured γγ(θ, H); deduced 111Cd electric field gradients in CuO, Cu2O.

doi: 10.1016/0375-9601(88)90424-0
Citations: PlumX Metrics


1987BO31      Hyperfine Interactions 35, 631 (1987)

W.Bolse, M.Uhrmacher, K.P.Lieb

Oxidation in the System InNi Observed with PAC

RADIOACTIVITY 111In(EC); measured γγ(θ, H, t); deduced quadrupole interaction parameters. Source implantation in Ni.

doi: 10.1007/BF02394465
Citations: PlumX Metrics


1987FO12      Hyperfine Interactions 35, 715 (1987)

D.Forkel, F.Meyer, W.Witthuhn, H.Wolf, M.Deicher, M.Uhrmacher

PAC Studies of Ion Implanted Silicon

RADIOACTIVITY 111In(EC); measured γγ(θ, H, t); deduced 111Cd electric field gradient in Si crystal.

doi: 10.1007/BF02394483
Citations: PlumX Metrics


1985BE17      Z.Phys. A320, 693 (1985)

F.J.Bergmeister, K.P.Lieb, K.Pampus, M.Uhrmacher

Note on Stellar 26Al Production via the 25Mg(p, γ) Process

NUCLEAR REACTIONS, ICPND 25Mg(p, γ), E ≈ 389.2-390 keV; measured γ yield vs E; deduced consequences to 26Al stellar production. 26Al deduced resonances, Γ.

doi: 10.1007/BF01411874
Citations: PlumX Metrics


1985BE31      Phys.Lett. 158B, 19 (1985)

R.Bertini, P.Birien, K.Braune, W.Bruckner, G.Bruge, H.Catz, A.Chaumeaux, J.Ciborowski, H.Dobbeling, J.M.Durand, R.W.Frey, D.Garreta, S.Janouin, T.J.Ketel, K.Kilian, H.Kneis, S.Majewski, B.Mayer, J.C.Peng, B.Povh, R.D.Ransome, R.Szwed, T.-A.Shibata, A.Thiessen, M.Treichel, M.Uhrmacher, Th.Walcher, and the Heidelberg-Saclay Collaboration

The (K-, π+) Strangeness Exchange Reaction on 16O

NUCLEAR REACTIONS 12C, 16O(K-, π+), E at 450 MeV/c; measured σ(E(π)); deduced Σ hypernuclear states.

doi: 10.1016/0370-2693(85)90730-0
Citations: PlumX Metrics


1985UH01      Nucl.Instrum.Methods Phys.Res. B9, 234 (1985)

M.Uhrmacher, K.Pampus, F.J.Bergmeister, D.Purschke, K.P.Lieb

Energy Calibration of the 500 kV Heavy Ion Implanter IONAS

NUCLEAR REACTIONS, ICPND 19F, 23Na, 24,26Mg, 27Al(p, γ); 19F(p, αγ), E ≈ resonance; measured γ yield vs E. 20Ne, 24Mg, 25,27Al, 28Si, 16O deduced resonance energy Γ.

doi: 10.1016/0168-583X(85)90688-3
Citations: PlumX Metrics


1984BE07      Phys.Lett. 136B, 29 (1984)

R.Bertini, P.Birien, K.Braune, W.Bruckner, G.Bruge, H.Catz, A.Chaumeaux, J.Ciborowski, H.Dobbeling, J.M.Durand, R.W.Frey, D.Garreta, S.Janouin, T.J.Ketel, K.Kilian, H.Kneis, S.Majewski, B.Mayer, J.C.Peng, B.Povh, R.D.Ransome, R.Szwed, T.-A.Shibata, A.Thiessen, M.Treichel, M.Uhrmacher, Th.Walcher

Sigma Hypernuclear States in (K-, π(±)) Reactions on 12C

NUCLEAR REACTIONS 12C(K-, π+), (K-, π-), E at 400, 450 MeV/c; measured hypernuclear mass spectra; deduced Sigma hypernuclear states in 12C.

doi: 10.1016/0370-2693(84)92049-5
Citations: PlumX Metrics


1984RA23      Hyperfine Interactions 20, 285 (1984)

F.Raether, F.J.Bergmeister, K.P.Lieb, M.Uhrmacher, H.Grawe, H.Haas

Magnetic Hyperfine Interaction of Swift 43K Ions Recoiling in Helium and Xenon

NUCLEAR REACTIONS 4He(40Ar, p), E=185 MeV; measured γ(θ, H, t); deduced swift 43K ion magnetic hyperfine interaction in He, Xe, K-hole production in 43K.

doi: 10.1007/BF02069377
Citations: PlumX Metrics


1983BE70      Hyperfine Interactions 14, 177 (1983)

F.J.Bergmeister, M.Uhrmacher, K.P.Lieb

Magnetic Hyperfine Interaction of 41Ca and 41K Nuclei Implanted into Iron

NUCLEAR REACTIONS 27Al(16O, np), (16O, 2p), E=32.5-35 MeV; measured γ(θ, H), γ(θ, H, t); deduced magnetic hyperfine field behavior for Ca, K in Fe.

doi: 10.1007/BF02143944
Citations: PlumX Metrics


1983RA37      Hyperfine Interactions 15/16, 59 (1983)

F.Raether, F.J.Bergmeister, M.Uhrmacher, K.P.Lieb, H.Grawe, H.Haas

Magnetic Moment and Lifetime of the 738 keV (7/2)- State in 43K

NUCLEAR REACTIONS 4He(40Ar, p), E=190 MeV; measured γ(θ, H, t). 43K level deduced g, T1/2. Pulsed beam, Ge(Li) detectors.

doi: 10.1007/BF02159715
Citations: PlumX Metrics


1981BE17      Nucl.Phys. A360, 315 (1981)

R.Bertini, O.Bing, P.Birien, K.Braune, W.Bruckner, H.Catz, A.Chaumeaux, M.A.Faessler, R.-W.Frey, D.Garreta, T.J.Ketel, K.Kilian, B.Mayer, J.Niewisch, B.Pietrzyk, B.Povh, H.G.Ritter, M.Uhrmacher

Hypernuclear Production in the (K-, π-) Reaction

NUCLEAR REACTIONS 6,7Li, 9Be, 40Ca(K-, π-), E at 790 MeV/c; 7Li, 9Be, 12C, 16O, 27Al, 32S, 51V, 89Y(K-, π-), E at 720 MeV/c; 209Bi(K-, π-), E at 640 MeV/c; measured σ(θ); deduced production σ for hypernuclei, effective neutron number in one-step strangeness exchange. DWIA.

doi: 10.1016/0375-9474(81)90149-4
Citations: PlumX Metrics


1981BE45      Nucl.Phys. A368, 365 (1981)

R.Bertini, O.Bing, P.Birien, K.Braune, W.Bruckner, A.Chaumeaux, M.A.Faessler, R.W.Frey, D.Garreta, T.J.Ketel, K.Kilian, B.Mayer, J.Niewisch, B.Pietrzyk, B.Povh, H.G.Ritter, M.Uhrmacher

Neutron Hole States in 6Li, 7Li, 9Be and 12C Hypernuclei

NUCLEAR REACTIONS 6,7Li, 9Be, 12C(K-, π-), E at 720-790 MeV/c; measured σ(lambda particle binding energy, θ); deduced neutron hole states in hypernuclei.

doi: 10.1016/0375-9474(81)90761-2
Citations: PlumX Metrics


1980BE12      Phys.Lett. 90B, 375 (1980)

R.Bertini, O.Bing, P.Birien, W.Bruckner, H.Catz, A.Chaumeaux, J.M.Durand, M.A.Faessler, T.J.Ketel, K.Kilian, B.Mayer, J.Niewisch, B.Pietrzyk, B.Povh, H.G.Ritter, M.Uhrmacher

Hypernuclei with Sigma Particles

NUCLEAR REACTIONS 9Be(K-, π-), E at 720 MeV/c; measured σ(λ particle binding energy), production σ for Σ particle; deduced λ-particle, Σ-particle shell spacing.

doi: 10.1016/0370-2693(80)90952-1
Citations: PlumX Metrics


1979BE17      Phys.Lett. 83B, 306 (1979)

R.Bertini, O.Bing, P.Birien, W.Bruckner, H.Catz, A.Chaumeaux, J.M.Durand, M.A.Faessler, T.J.Ketel, K.Kilian, B.Mayer, J.Niewisch, B.Pietrzyk, B.Povh, H.G.Ritter, M.Uhrmacher

A Full Set of Nuclear Shell Orbitals for the lambda Particle Observed in 32S and 40Ca

NUCLEAR REACTIONS 32S(K-, π-), E at 720 MeV/c; 40Ca(K-, π-), E at 790 MeV/c; measured σ(λ-particle binding energy, θ); deduced λ-particle shell spacing.

doi: 10.1016/0370-2693(79)91113-4
Citations: PlumX Metrics


1978HE13      Phys.Rev. C17, 2113 (1978)

H.P.Hellmeister, E.Schmidt, M.Uhrmacher, R.Rascher, K.P.Lieb, D.Pantelica

Recoil Distance Lifetime Measurements in 69As and 72Se

NUCLEAR REACTIONS 54Fe(18O, 2npγ), E=45, 50, 55 MeV; measured σ(E). 55Mn(16O, 2nγ), E=46 MeV; measured γγ-coin. 56Fe(16O, 2npγ), E=59 MeV; measured recoil distance. 58Ni(16O, pα), E=47, 52.5, 58 MeV; measured γ(θ), γγ-coin, recoil distance, DSA. 69As, 72Se deduced levels, T1/2, J, π, δ.

doi: 10.1103/PhysRevC.17.2113
Citations: PlumX Metrics


1976KE02      Phys.Rev. C14, 160 (1976)

J.Keinonen, R.Rascher, M.Uhrmacher, N.Wust, K.P.Lieb

M2 Transitions between the 1f7/2 and the 1d3/2 Orbit

NUCLEAR REACTIONS 25Mg, 27Al(16O, X), E=30-50 MeV; measured Eγ, recoil distance DSA. 36Cl levels deduced γ-branching. 35,36Cl, 40K, 41Ca levels deduced T1/2. M2 transition systematics 33 ≤ A ≤ 47.

doi: 10.1103/PhysRevC.14.160
Citations: PlumX Metrics


1976RA05      Phys.Rev. C13, 1217 (1976)

R.Rascher, K.P.Lieb, M.Uhrmacher

Effect of Deorientation in Recoil-Distance Lifetime Measurements

NUCLEAR REACTIONS 27Al(16O, X), E=32.5 MeV; measured γ(θ, t) for recoil in vacuum. 38Ar, 40,41K, 41Ca levels deduced T1/2, hyperfine perturbations.

doi: 10.1103/PhysRevC.13.1217
Citations: PlumX Metrics


1975FR04      Phys.Rev.Lett. 34, 745 (1975)

H.-G.Friederichs, A.Gelberg, B.Heits, K.P.Lieb, M.Uhrmacher, K.O.Zell, P.von Brentano

Lifetime Measurements in 80Kr and 81Rb

NUCLEAR REACTIONS 65Cu(18O, 2npγ), E=52.5 MeV; 65Cu(19F, 2npγ), E=50 MeV; measured recoil distance, DSA. 80Kr, 81Rb levels deduced T1/2, B(E2).

doi: 10.1103/PhysRevLett.34.745
Citations: PlumX Metrics


1975UH01      Z.Phys. A272, 403 (1975)

M.Uhrmacher, J.Dauk, N.Wust, K.P.Lieb, A.M.Kleinfeld

The Gamma Decay of High Spin States of 39K

NUCLEAR REACTIONS 28Si(16O, pαγ), 25Mg(16O, pnγ), E=30-50 MeV; measured recoil distance DSA, γγ(t), Eγ, Iγ, γ(θ). 39K deduced levels, J, π, T1/2, B(λ), γ-branching.

doi: 10.1007/BF01440868
Citations: PlumX Metrics


1975UH02      Phys.Lett. 56B, 247 (1975)

M.Uhrmacher, A.Gelberg, F.Brandolini, A.M.Kleinfeld, K.P.Lieb

Perturbed Angular Distributions in 41Ca and 42Ca

NUCLEAR REACTIONS 27Al(16O, npγ), 28Si(16O, 2pγ), E=32.5 MeV; measured γ(θ, H, t). 41,42Ca levels deduced g.

doi: 10.1016/0370-2693(75)90386-X
Citations: PlumX Metrics


1975WU01      J.Phys.(London) G1, 57 (1975)

N.Wust, M.Uhrmacher, J.Dauk, K.P.Lieb, A.M.Kleinfeld

Lifetime Measurements in 42Ca

NUCLEAR REACTIONS 28Si(16O, 2pγ), E=36.5-50 MeV; measured σ(E, Eγ), recoil distance, DSA. 42Ca levels deduced T1/2, J, π.

doi: 10.1088/0305-4616/1/1/008
Citations: PlumX Metrics


1974LI06      Z.Phys. 267, 399 (1974)

K.P.Lieb, M.Uhrmacher

Lifetime of the 2755 keV 15/2- State in 43Ca

NUCLEAR REACTIONS 28Si(18O, n2pγ), (16O, 2pγ); measured recoil distance. 42,43Ca level deduced T1/2.

doi: 10.1007/BF01669973
Citations: PlumX Metrics


1974LI07      Nucl.Phys. A223, 445 (1974)

K.P.Lieb, M.Uhrmacher, J.Dauk, A.M.Kleinfeld

Lifetime Measurements of States in 41Ca and 41K

NUCLEAR REACTIONS 27Al(16O, pnγ), (16O, 2pγ), E=32.5-44 MeV; measured σ(Eγ), Doppler shift. 41Ca, 41K deduced levels, T1/2, γ-branching. Natural target, Ge(Li) detector.

doi: 10.1016/0375-9474(74)90699-X
Citations: PlumX Metrics


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