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NSR database version of April 26, 2024.

Search: Author = H.J.Keller

Found 15 matches.

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1987KO41      Nucl.Instrum.Methods Phys.Res. A257, 244 (1987)

R.Kotte, H.-J.Keller, H.-G.Ortlepp, F.Stary

Bragg Peak Spectroscopy of Low-Energy Heavy Ions

RADIOACTIVITY ²¹⁰Po, ²⁴¹Am(α); measured Eα. Ionization chambers.

ATOMIC PHYSICS ¹⁹⁷Au(¹²C, ¹²C), (¹⁶O, ¹⁶O), (³⁵Cl, ³⁵Cl), (²⁸Si, ²⁸Si), (³²S, ³²S), (⁷⁹Br, ⁷⁹Br), E=22.75-36 MeV; measured Bragg peak height vs Z, energy distribution, Z resolution vs energy loss. Ionization chamber.

doi: 10.1016/0168-9002(87)90743-1
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1987PR06      Nucl.Phys. A472, 381 (1987)

H.Prade, W.Enghardt, I.Dioszegi, L.Kaubler, H.-J.Keller, F.Stary, G.Winter

In-Beam Investigations and Structure Studies of Multiparticle Excitations in the N = 82, 83 Nuclei ^138,139Ba

NUCLEAR REACTIONS ¹³⁶Xe(α, 2n), (α, n), E=20, 22, 24, 27 MeV; measured Eγ, Iγ, γγ-coin, σ(E, Eγ, θγ), γ-ray linear polarization, Doppler shift, γ(t). ^138,139Ba deduced levels, J, π, T_1/2, γ-multipolarity, δ. Enriched ¹³⁶Xe target. Shell-model, particle-core coupling calculations.

doi: 10.1016/0375-9474(87)90039-X
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1986EN01      Nucl.Phys. A449, 417 (1986)

W.Enghardt, L.Kaubler, H.Prade, H.-J.Keller, F.Stary

In-Beam Study of Multiparticle Excitations in the Semi-Magic Nucleus ¹⁴⁰Ce

NUCLEAR REACTIONS ¹³⁸Ba(α, 2nγ), E=20, 22, 24, 27 MeV; measured Eγ, Iγ, γγ-coin, σ(Eα, Eγ, θγ), γ linear polarization. ¹⁴⁰Ce deduced levels, J, π, T_1/2, γ-multipolarity, δ. Enriched ¹³⁸Ba target, Ge(Li) detectors. Shell-model, particle-core coupling calculations.

doi: 10.1016/0375-9474(86)90229-0
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1986EN06      Ann.Phys.(Leipzig) 43, 424 (1986)

W.Enghardt, H.Prade, H.U.Jager, L.Kaubler, H.-J.Keller, F.Stary, L.K.Kostov

Microscopic Structure of Semimagic Nuclei with 82 Neutrons or 50 Protons

NUCLEAR STRUCTURE ¹³⁸Ba, ¹⁴⁰Ce, ¹⁴¹Pr, ¹⁴³Pm, ¹⁴⁴Sm, ^109,111Sn; calculated levels, g. Shell model.

NUCLEAR REACTIONS ¹³⁶Xe, ¹³⁸Ba, ¹³⁹La, ¹⁴¹Pr, ¹⁴²Nd, ¹⁰⁶Cd(α, 2n), ¹⁴²Nd(α, 2np), ¹⁰⁸Cd(α, n), E=20-27 MeV; ¹⁴⁰Ce(d, n), E=13.5 MeV; ¹¹¹Cd(³He, 3n), E=28-32 MeV; ¹⁰⁹Ag(⁶Li, 4n), E=40.5 MeV; measured Eγ, Iγ, γγ-coin, σ(E), γ(θ), γ(t), linear polarization, I(ce). ¹³⁸Ba, ¹⁴⁰Ce, ¹⁴¹Pr, ¹⁴³Pm, ¹⁴⁴Sm, ^109,111Sn deduced levels, J, π, T_1/2, g. In-beam γ spectroscopy. Shell model.

doi: 10.1002/andp.19864980606
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1985KE09      Nucl.Phys. A444, 261 (1985)

H.-J.Keller, S.Frauendorf, U.Hagemann, L.Kaubler, H.Prade, F.Stary

In-Beam Study of ¹⁰⁵Ag and Configuration-Dependent Triaxiality in Nuclei around A = 105

NUCLEAR STRUCTURE ^104,105,107Ag, ^104,105Pd; calculated levels. Cranked shell model.

NUCLEAR REACTIONS ¹⁰³Rh(α, 2n), E=20-27 MeV; ¹⁰⁵Pd(d, 2n), E=13.5 MeV; measured Eγ, Iγ, σ(E, Eγ, θγ), αγ(t), γγ-coin, Iγ(θ, t, H). ¹⁰⁵Ag deduced levels, J, π, δ(E2/M1), T_1/2, g. Enriched targets. Ge(Li) detectors. Cranked shell model analysis.

doi: 10.1016/0375-9474(85)90350-1
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetF0544.

1984EN01      Z.Phys. A316, 245 (1984)

W.Enghardt, H.U.Jager, L.Kaubler, H.-J.Keller, H.Prade, F.Stary

Excited States above the 6⁺ Isomer in ¹⁴⁰Ce

NUCLEAR REACTIONS ¹³⁸Ba(α, 2n), E=20-27 MeV; measured Eγ, Iγ, γγ-coin, γ(θ), linear polarization, γ(t), γ(t, H). ¹⁴⁰Ce deduced levels, J, π, γ-branching, configuration. Shell model, particle-core coupling model comparisons.

doi: 10.1007/BF01412272
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1984EN02      ATOMKI Kozlem. 26, 34 (1984)

W.Enghardt, H.U.Jager, L.Kaubler, H.J.Keller, H.Prade, F.Stary

Evidence for Core Coupled States of Negative Parity in ¹³⁸Ba and ¹⁴⁰Ce

NUCLEAR REACTIONS ¹³⁶Xe, ¹³⁸Ba(α, 2n), E not given; measured γ-spectra. ¹³⁸Ba, ¹⁴⁰Ce deduced levels, J, π, configuration. Particle-core coupling, shell model description.

1984KA16      ATOMKI Kozlem. 26, 27 (1984)

L.Kaubler, W.Enghardt, H.J.Keller, L.Kostov, H.Prade, F.Stary

Half-Lives of ¹⁰⁹Sn and Shell-Model Calculations

NUCLEAR REACTIONS ¹⁰⁶Cd(α, n), E=20 MeV; measured γ-spectra, centroid shift time distribution. ¹⁰⁹Sn levels deduced T_1/2. Shell model comparison.

1984PR06      Nucl.Phys. A425, 317 (1984)

H.Prade, W.Enghardt, W.D.Fromm, H.U.Jager, L.Kaubler, H.-J.Keller, L.K.Kostov, F.Stary, G.Winkler, L.Westerberg

New Positive-Parity States and the Shell-Model Description of ¹¹¹Sn

NUCLEAR REACTIONS, ICPND ¹⁰⁸Cd(α, n), E=20-27 MeV; measured Eγ, Iγ, γγ-coin, σ(E, Eγ, θγ), αγ(t), I(ce), γ yield vs E. ¹¹¹Cd(³He, 3n), E=28-32 MeV; measured Eγ, Iγ, γγ-coin, σ(E, Eγ, γγ), ³Heγ(t), γ yield vs E. ¹⁰⁹Ag(⁶Li, 4n), E=40.5 MeV; measured Eγ, Iγ. ¹¹¹Sn deduced levels, J, π, T_1/2, ICC, δ(E2/M1). Enriched targets, Ge(Li), Si-Li detectors. Shell model analysis.

doi: 10.1016/0375-9474(84)90078-2
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1982HA46      Nucl.Phys. A389, 341 (1982)

U.Hagemann, L.Kaubler, H.-J.Keller, F.R.May, H.Prade, F.Stary

Investigation of ¹²¹I Levels Observed in the (³He, 3n) Reaction

NUCLEAR REACTIONS ¹²¹Sb(³He, 3n), E=24.3, 27.5, 29.9, 32.0 MeV; measured E(γ), I(γ), σ(E, Eγ, θγ), ³Heγ(t), γγ-coin, Iγ(θ, t, H). ¹²¹I deduced levels, J, π, T_1/2, g. Enriched ¹²¹Sb target, Ge(Li) detectors. Core-quasiparticle coupling calculations.

NUCLEAR STRUCTURE ¹²¹I; calculated potential energy surfaces, levels. Core-quasiparticle coupling model, angular momentum projection.

doi: 10.1016/0375-9474(82)90523-1
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1981PR09      Nucl.Phys. A370, 47 (1981)

H.Prade, W.Enghardt, H.U.Jager, L.Kaubler, H.-J.Keller, F.Stary

In-Beam Study and Structure of the N = 82 Nucleus ¹⁴¹Pr

NUCLEAR REACTIONS ¹³⁹La(α, 2nγ), E=20, 22, 24, 27 MeV; ¹⁴⁰Ce(d, nγ), E=13.5 MeV; measured Eγ, Iγ, γγ-coin, σ(E, Eγ, θγ), γ(t), I(ce), γ-ray linear polarization. ¹⁴¹Pr deduced levels, J, π, T_1/2, ICC, γ-multipolarity, δ. Natural La target, enriched ¹⁴⁰Ce target, Ge(Li), Si(Li) detector. Shell-model calculations.

doi: 10.1016/0375-9474(81)90754-5
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1979HA18      Z.Phys. A290, 399 (1979)

U.Hagemann, H.-J.Keller, C.Protochristow, F.Stary

ΔJ = 1 Band Structures on ns-Isomeric States in Odd Mass ^117,119,121Te Nuclei

NUCLEAR REACTIONS ^115,117,119Sn(α, 2n), E=19.8, 22.1, 24.2, 27.0 MeV; ¹¹⁷Sn(³He, 3n), E not given; ¹²¹Sb(d, 2n), E not given; measured Eγ, Iγ, γ(θ), γγ-coin, Eγ(t), I(ce), γ-L(p). ^117,119,121Te deduced levels, J, π, T_1/2, mixing ratios, band structure, Nilsson assignments. Enriched targets, Coriolis calculations.

doi: 10.1007/BF01408403
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1979HA47      Nucl.Phys. A329, 157 (1979)

U.Hagemann, H.-J.Keller, Ch.Protochristow, F.Stary

Collective Excitations in the ^117,119,121Te Nuclei

NUCLEAR REACTIONS ^115,117,119Sn(α, 2nγ), E=19.8-27.0 MeV; ¹¹⁷Sn(³He, 3nγ), E=32 MeV; ¹²¹Sb(d, 2nγ), E=13.5 MeV; measured σ(Eα, Eγ, θ), Eγ, Iγ, γγ-coin, αγ(t), E(ce), I(ce), linear polarization. ^117,119,121Te deduced levels, J, π, T_1/2, ICC, γ-multipolarity, δ. Enriched targets. Ge(Li), Si(Li) detectors, solenoidal electron spectrometer. Rigid triaxial rotor, soft rotor, γ-unstable potential calculations.

doi: 10.1016/0375-9474(79)90287-2
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1977HA36      Nucl.Phys. A289, 292 (1977)

U.Hagemann, H.-J.Keller, H.-F.Brinckmann

Collective Excitations in the ^123,125I Nuclei

NUCLEAR REACTIONS ^121,123Sb(α, 2nγ), Eα=19.8, 22.4, 24.4, 27.0 MeV; measured Eγ, Iγ, γ(θ), γγ-coin, γγ(t), E(ce), I(ce). ^123,125I deduced levels, J, π, T_1/2, ICC. Enriched targets. Ge(Li), Si(Li) detectors.

doi: 10.1016/0375-9474(77)90034-3
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1976FU07      Nucl.Phys. A274, 61 (1976)

L.Funke, W.D.Fromm, H.J.Keller, R.Arlt, P.M.Gopytsch

Multiplet Splitting and Isomerism in ¹⁴²Pm and ¹⁴⁴Eu

NUCLEAR REACTIONS ¹⁴²Nd, ¹⁴⁴Sm(d, 2nγ), E=13.5 MeV; measured Eγ, Iγ, γ(θ, t), γγ-coin, γγ(t), I(ce). ¹⁴²Nd, ¹⁴⁴Sm(p, nγ), E=5-10 MeV; measured Eγ, Iγ, γγ(t). ¹⁴²Pm, ¹⁴⁴Eu deduced levels, J, π, T_1/2, B(λ), ICC. Enriched targets. Ge(Li), Si(Li) detectors.

doi: 10.1016/0375-9474(76)90227-X
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