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NSR database version of April 11, 2024.

Search: Author = U.Kneissl

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2009MO10      Phys.Rev. C 79, 045804 (2009)

P.Mohr, S.Bisterzo, R.Gallino, F.Kappeler, U.Kneissl, N.Winckler

Properties of the 5- state at 839 keV in 176Lu and the s-process branching at A=176

NUCLEAR STRUCTURE 176Lu; analyzed partial level scheme, coupling between low- and high-K states; calculated reaction rates for photoactivation process and for transitions from high K ground state to low K isomers in 176Lu. Implications for 176Lu/176Hf as thermometer for astrophysical s-process.

doi: 10.1103/PhysRevC.79.045804
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2007LI07      Phys.Rev. C 75, 024310 (2007)

A.Linnemann, C.Fransen, J.Jolie, U.Kneissl, P.Knoch, C.Kohstall, D.Mucher, H.H.Pitz, M.Scheck, C.Scholl, F.Stedile, P.von Brentano, N.Warr, V.Werner

Low-lying J=1 states in 106Cd

RADIOACTIVITY 106In(β+), (EC) [from 106Cd(p, n)]; measured Eγ, Iγ, γγ-coin. 106Cd deduced levels, J, π, δ, configurations, possible quadrupole-octupole coupled state.

NUCLEAR REACTIONS 106Cd(γ, γ'), E=3.1 MeV bremsstrahlung; measured Eγ, Iγ. 106Cd deduced levels, J, π, δ, configurations, possible quadrupole-octupole coupled state.

doi: 10.1103/PhysRevC.75.024310
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2007OR01      Phys.Rev. C 75, 014303 (2007)

J.N.Orce, C.Fransen, A.Linnemann, C.J.McKay, S.R.Lesher, N.Pietralla, V.Werner, G.Friessner, C.Kohstall, D.Mucher, H.H.Pitz, M.Scheck, C.Scholl, F.Stedile, N.Warr, S.Walter, P.von Brentano, U.Kneissl, M.T.McEllistrem, S.W.Yates

Lifetime measurements in 93Nb from photon and inelastic neutron scattering

NUCLEAR REACTIONS 93Nb(γ, γ'), E=2.75 MeV bremsstrahlung; measured Eγ, Iγ. 93Nb(n, n'γ), E=2.1, 2.6 MeV; measured Eγ, Iγ, DSA. 94Zr(p, 2n), E=11.5-19 MeV; measured Eγ, Iγ, γγ-coin, angular correlations. 93Nb deduced levels, J, π, δ, T1/2.

doi: 10.1103/PhysRevC.75.014303
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2007SC18      Phys.Rev. C 75, 044313 (2007)

M.Scheck, P.von Brentano, C.Fransen, U.Kneissl, C.Kohstall, A.Linnemann, D.Mucher, N.Pietralla, H.H.Pitz, C.Scholl, F.Stedile, S.Walter, V.Werner, S.W.Yates

Dipole strength distributions of the stable odd-mass N = 82 isotones 139La and 141Pr

NUCLEAR REACTIONS 139La, 141Pr(γ, γ'), E=4.1 MeV bremsstrahlung; measured Eγ, Iγ. 139La, 141Pr deduced level energies, widths, B(E1), B(M1), dipole strength distributions, blocking effect.

doi: 10.1103/PhysRevC.75.044313
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2007WA08      Phys.Rev. C 75, 034301 (2007)

S.Walter, F.Stedile, J.J.Carroll, C.Fransen, G.Friessner, N.Hollmann, H.von Garrel, J.Jolie, O.Karg, F.Kappeler, U.Kneissl, C.Kohstall, P.von Neumann-Cosel, A.Linnemann, D.Mucher, N.Pietralla, H.H.Pitz, G.Rusev, M.Scheck, C.Scholl, R.Schwengner, V.Werner, K.Wisshak

Photon scattering experiments on the quasistable, odd-odd mass nucleus 176Lu

NUCLEAR REACTIONS 176Lu(γ, γ'), E=2.3, 3.1 MeV bremsstrahlung; measured Eγ, Iγ. 176Lu deduced transitions, B(M1), B(E1), strength distribution.

doi: 10.1103/PhysRevC.75.034301
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2006KN02      J.Phys.(London) G32, R217 (2006)

U.Kneissl, N.Pietralla, A.Zilges

Low-lying dipole modes in vibrational nuclei studied by photon scattering

doi: 10.1088/0954-3899/32/8/R01
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2006PY01      Phys.Rev. C 73, 017302 (2006)

I.Pysmenetska, S.Walter, J.Enders, H.von Garrel, O.Karg, U.Kneissl, C.Kohstall, P.von Neumann-Cosel, H.H.Pitz, V.Yu.Ponomarev, M.Scheck, F.Stedile, S.Volz

Two-phonon 1- state in 112Sn observed in resonant photon scattering

NUCLEAR REACTIONS 112Sn(γ, γ'), E=3.8 MeV bremsstrahlung; measured Eγ, Iγ. 112Sn deduced level J, π, width, configuration, excitation B(E1).

NUCLEAR STRUCTURE 112,116,118,120,122,124Sn; analyzed level energies, transitions B(E1). Quasiparticle-phonon model.

doi: 10.1103/PhysRevC.73.017302
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2006RU06      Phys.Rev. C 73, 044308 (2006)

G.Rusev, R.Schwengner, F.Donau, M.Erhard, S.Frauendorf, E.Grosse, A.R.Junghans, L.Kaubler, K.Kosev, L.K.Kostov, S.Mallion, K.D.Schilling, A.Wagner, H.von Garrel, U.Kneissl, C.Kohstall, M.Kreutz, H.H.Pitz, M.Scheck, F.Stedile, P.von Brentano, C.Fransen, J.Jolie, A.Linnemann, N.Pietralla, V.Werner

Systematics of magnetic dipole strength in the stable even-mass Mo isotopes

NUCLEAR REACTIONS 92Mo(γ, γ'), E=6.0 MeV bremsstrahlung; 98,100Mo(γ, γ'), E ≈ 3.3, 3.8 MeV bremsstrahlung; measured Eγ, Iγ. 92,98,100Mo deduced transitions B(M1), strength distributions. Comparison with quasiparticle RPA model predictions.

doi: 10.1103/PhysRevC.73.044308
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2006VO04      Phys.Rev. C 73, 054315 (2006)

H.von Garrel, P.von Brentano, C.Fransen, G.Friessner, N.Hollmann, J.Jolie, F.Kappeler, L.Kaubler, U.Kneissl, C.Kohstall, L.Kostov, A.Linnemann, D.Mucher, N.Pietralla, H.H.Pitz, G.Rusev, M.Scheck, K.D.Schilling, C.Scholl, R.Schwengner, F.Stedile, S.Walter, V.Werner, K.Wisshak

Low-lying E1, M1, and E2 strength distributions in 124, 126, 128, 129, 130, 131, 132, 134, 136Xe: Systematic photon scattering experiments in the mass region of a nuclear shape or phase transition

NUCLEAR REACTIONS 124,126,128,129,130,131,132,134,136Xe(γ, γ'), E=4.1 MeV bremsstrahlung; measured Eγ, Iγ. 124,126,128,129,130,131,132,134,136Xe deduced levels, J, π, branching ratios, B(E1), B(M1).

doi: 10.1103/PhysRevC.73.054315
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2005KO32      Phys.Rev. C 72, 034302 (2005)

C.Kohstall, D.Belic, P.von Brentano, C.Fransen, A.Gade, R.-D.Herzberg, J.Jolie, U.Kneissl, A.Linnemann, A.Nord, N.Pietralla, H.H.Pitz, M.Scheck, F.Stedile, V.Werner, S.W.Yates

Low-lying dipole excitations in vibrational nuclei: The Cd isotopic chain studied in photon scattering experiments

NUCLEAR REACTIONS 110,111,112,114,116Cd(γ, γ'), E ≈ 2.7-4.1 MeV bremsstrahlung; measured Eγ, Iγ, γ-ray polarization. 110,111,112,114,116Cd deduced levels, J, π, excitation B(M1), B(E1).

doi: 10.1103/PhysRevC.72.034302
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2005LI14      Phys.Rev. C 71, 044318 (2005)

T.C.Li, N.Pietralla, C.Fransen, H.von Garrel, U.Kneissl, C.Kohstall, A.Linnemann, H.H.Pitz, G.Rainovski, A.Richter, M.Scheck, F.Stedile, P.von Brentano, P.von Neumann-Cosel, V.Werner

One-phonon 2+1, ms mixed-symmetry state of 148Sm observed in nuclear resonance fluorescence

NUCLEAR REACTIONS 148Sm(γ, γ'), E=3.2 MeV bremsstrahlung; measured Eγ, Iγ. 148Sm deduced levels, J, π, B(M1), B(E1), B(E2), mixed-symmetry state. Nuclear resonance fluorescence, interacting boson model.

doi: 10.1103/PhysRevC.71.044318
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2005LI59      Phys.Rev. C 72, 064323 (2005)

A.Linnemann, C.Fransen, M.Gorska, J.Jolie, U.Kneissl, P.Knoch, D.Mucher, H.H.Pitz, M.Scheck, C.Scholl, P.von Brentano

Dipole excitations in 96Ru

NUCLEAR REACTIONS 96Ru(γ, γ'), E=3.8 MeV bremsstrahlung; measured Eγ, Iγ. 96Ru deduced levels, J, π, dipole excitation features.

doi: 10.1103/PhysRevC.72.064323
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2005RU14      Phys.Rev.Lett. 95, 062501 (2005)

G.Rusev, R.Schwengner, F.Donau, S.Frauendorf, L.Kaubler, L.K.Kostov, S.Mallion, K.D.Schilling, A.Wagner, E.Grosse, H.von Garrel, U.Kneissl, C.Kohstall, M.Kreutz, H.H.Pitz, M.Scheck, F.Stedile, P.von Brentano, J.Jolie, A.Linnemann, N.Pietralla, V.Werner

Decay of 1+ States as a New Probe of the Structure of 0+ Shape Isomers

NUCLEAR REACTIONS 98,100Mo(γ, γ'), E=3.2-3.8 MeV bremsstrahlung; measured Eγ, Iγ. 98,100Mo deduced levels, J, π, branching ratios, transition probabilities, shape isomer configuration mixing features.

doi: 10.1103/PhysRevLett.95.062501
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2004FR30      Phys.Rev. C 70, 044317 (2004)

C.Fransen, N.Pietralla, A.P.Tonchev, M.W.Ahmed, J.Chen, G.Feldman, U.Kneissl, J.Li, V.N.Litvinenko, B.Perdue, I.V.Pinayev, H.H.Pitz, R.Prior, K.Sabourov, M.Spraker, W.Tornow, H.R.Weller, V.Werner, Y.K.Wu, S.W.Yates

Parity assignments to strong dipole excitations of 92Zr and 96Mo

NUCLEAR REACTIONS 92Zr(polarized γ, γ'), E=3.47, 3.64 MeV; 96Mo(γ, γ'), E=2.80, 3.30, 3.43, 3.60, 3.90 MeV; measured Eγ, Iγ, azimuthal asymmetry. 92Zr, 96Mo levels deduced π.

doi: 10.1103/PhysRevC.70.044317
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2004GA25      Phys.Rev. C 69, 054321 (2004)

A.Gade, N.Pietralla, P.von Brentano, D.Belic, C.Fransen, U.Kneissl, C.Kohstall, A.Linnemann, H.H.Pitz, M.Scheck, N.A.Smirnova, F.Stedile, V.Werner

Investigation of dipole excitations in 142Ce using resonant photon scattering

NUCLEAR REACTIONS 142Ce(γ, γ'), E=4.1 MeV bremsstrahlung; measured Eγ, Iγ. 142Ce deduced levels, J, dipole strength distribution. Nuclear resonance fluorescence, comparison with model predictions.

doi: 10.1103/PhysRevC.69.054321
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2004SC36      Yad.Fiz. 67, 1710 (2004); Phys.Atomic Nuclei 67, 1682 (2004)

M.Scheck, P.von Brentano, C.Fransen, A.Gade, H.von Garrel, J.Jolie, U.Kneissl, C.Kohstall, A.Linnemann, N.Pietralla, H.H.Pitz, F.Stedile, S.Walter, V.Werner

Low-Lying Dipole Excitations in Nuclei in the Mass Regions of the New Dynamical Symmetries

NUCLEAR STRUCTURE Z=56-78; compiled, analyzed B(E1), B(M1); deduced phase transition features. 154,156,158,160Gd, 144,146,148,150Nd, 134,136,138Ba; analyzed M1 strength distributions.

doi: 10.1134/1.1806907
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2004SC39      Phys.Rev. C 70, 044319 (2004)

M.Scheck, H.von Garrel, N.Tsoneva, D.Belic, P.von Brentano, C.Fransen, A.Gade, J.Jolie, U.Kneissl, C.Kohstall, A.Linnemann, A.Nord, N.Pietralla, H.H.Pitz, F.Stedile, C.Stoyanov, V.Werner

Dipole strength distributions in the stable Ba isotopes 134-138Ba: A study in the mass region of a nuclear shape transition

NUCLEAR REACTIONS 135,137Ba(γ, γ'), E=2.5, 3.1, 4.1 MeV bremsstrahlung; measured Eγ, Iγ. 135,137Ba deduced level energies, widths, branching ratios, dipole strength distributions. Comparison with quasiparticle-phonon model predictions.

doi: 10.1103/PhysRevC.70.044319
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2003FR02      Phys.Rev. C 67, 024307 (2003)

C.Fransen, N.Pietralla, Z.Ammar, D.Bandyopadhyay, N.Boukharouba, P.von Brentano, A.Dewald, J.Gableske, A.Gade, J.Jolie, U.Kneissl, S.R.Lesher, A.F.Lisetskiy, M.T.McEllistrem, M.Merrick, H.H.Pitz, N.Warr, V.Werner, S.W.Yates

Comprehensive studies of low-spin collective excitations in 94Mo

NUCLEAR REACTIONS 94Mo(γ, γ'), E=3.3, 4.0 MeV bremsstrahlung; 94Mo(n, n'γ), E=2.4, 3.3, 3.6 MeV; measured Eγ, Iγ. 91Zr(α, n), E=12, 15 MeV; measured Eγ, Iγ, γγ-coin, DSA. 94Mo deduced levels, J, π, T1/2, B(M1), B(E2), mixed-symmetry states. Comparison with model predictions.

RADIOACTIVITY 94mTc(β+), (EC) [from 94Mo(p, n)]; measured Eγ, Iγ, γγ-coin. 94Mo deduced levels, J, π. Comparison with model predictions.

doi: 10.1103/PhysRevC.67.024307
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2003GA06      Phys.Rev. C 67, 034304 (2003)

A.Gade, D.Belic, P.von Brentano, C.Fransen, H.von Garrel, J.Jolie, U.Kneissl, C.Kohstall, A.Linnemann, H.H.Pitz, M.Scheck, F.Stedile, V.Werner

Dipole excitations in 108Cd

NUCLEAR REACTIONS 108Cd(γ, γ'), E=4.1 MeV bremsstrahlung; measured Eγ, Iγ. 108Cd deduced levels T1/2, branching ratios, electric and magnetic dipole strengths. Nuclear resonance fluorescence, comparison with neighboring isotopes.

doi: 10.1103/PhysRevC.67.034304
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2003NO02      Phys.Rev. C 67, 034307 (2003)

A.Nord, J.Enders, A.E.de Almeida Pinto, D.Belic, P.von Brentano, C.Fransen, U.Kneissl, C.Kohstall, A.Linnemann, P.von Neumann-Cosel, N.Pietralla, H.H.Pitz, A.Richter, F.Stedile, V.Werner

Low-energy photon scattering experiments of 151, 153Eu, 163Dy, and 165Ho and the systematics of the M1 scissors mode in odd-mass rare-earth nuclei

NUCLEAR REACTIONS 151,153Eu, 163Dy, 165Ho(γ, γ'), E=4.05 MeV bremsstrahlung; measured Eγ, Iγ. 151,153Eu, 163Dy, 165Ho deduced transitions B(M1), dipole strength distributions, scissors mode features. Comparisons with previous results in neighboring nuclides.

doi: 10.1103/PhysRevC.67.034307
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2003SC15      Phys.Rev. C 67, 064313 (2003)

M.Scheck, D.Belic, P.von Brentano, J.J.Carroll, C.Fransen, A.Gade, H.von Garrel, U.Kneissl, C.Kohstall, A.Linnemann, N.Pietralla, H.H.Pitz, F.Stedile, R.Toman, V.Werner

Photon scattering experiments off 176Hf and the systematics of low-lying dipole modes in the stable even-even Hf isotopes 176, 178, 180Hf

NUCLEAR REACTIONS 176Hf(γ, γ'), E=2.4, 4.1 MeV bremsstrahlung; measured Eγ, Iγ. 176Hf deduced levels, J, π, excitation B(M1), B(E1).

NUCLEAR STRUCTURE 176,178,180Hf; analyzed dipole strength distributions.

doi: 10.1103/PhysRevC.67.064313
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2002BE18      Phys.Rev. C65, 035801 (2002)

D.Belic, C.Arlandini, J.Besserer, J.de Boer, J.J.Carroll, J.Enders, T.Hartmann, F.Kappeler, H.Kaiser, U.Kneissl, E.Kolbe, K.Langanke, M.Loewe, H.J.Maier, H.Maser, P.Mohr, P.von Neumann-Cosel, A.Nord, H.H.Pitz, A.Richter, M.Schumann, F.-K.Thielemann, S.Volz, A.Zilges

Photo-Induced Depopulation of the 180Tam Isomer via Low-Lying Intermediate States: Structure and astrophysical implications

NUCLEAR REACTIONS 180mTa(γ, γ'), E=0.8-3.1 MeV bremsstrahlung; measured delayed Eγ, Iγ, X-ray spectra; deduced activation yields. 180Ta deduced intermediate states energies, transition strengths. Astrophysical implications discussed. Comparisons with previous results, model predictions.

RADIOACTIVITY 180Ta(EC), (β-); measured T1/2.

doi: 10.1103/PhysRevC.65.035801
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2002BR05      Phys.Rev. C65, 024313 (2002)

J.Bryssinck, L.Govor, F.Bauwens, D.Belic, P.von Brentano, D.De Frenne, C.Fransen, A.Gade, E.Jacobs, U.Kneissl, C.Kohstall, A.Linnemann, A.Nord, N.Pietralla, H.H.Pitz, M.Scheck, F.Stedile, V.Werner

Low-Energy Electromagnetic Excitation Strengths in 121Sb and 123Sb

NUCLEAR REACTIONS 121,123Sb(γ, γ'), E=4.1 MeV bremsstrahlung; measured Eγ, Iγ, elastic scattering cross sections. 121,123Sb deduced levels excitation B(E1), B(M1). Nuclear resonance fluorescence, comparisons with neighboring nuclides.

doi: 10.1103/PhysRevC.65.024313
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2002KA25      Phys.Rev. C65, 054315 (2002)

L.Kaubler, K.D.Schilling, R.Schwengner, F.Donau, E.Grosse, D.Belic, P.von Brentano, M.Bubner, C.Fransen, M.Grinberg, U.Kneissl, C.Kohstall, A.Linnemann, P.Matschinsky, A.Nord, N.Pietralla, H.H.Pitz, M.Scheck, F.Stedile, V.Werner

Influence of the N = 50 Neutron Core on Dipole Excitations in 87Rb

NUCLEAR REACTIONS 87Rb(γ, γ'), E=4.0 MeV bremsstrahlung; measured Eγ, Iγ. 87Rb deduced levels, J, π, configurations, excitation B(M1), B(E1), widths. Comparison with shell model predictions.

doi: 10.1103/PhysRevC.65.054315
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2002WE15      Phys.Lett. 550B, 140 (2002)

V.Werner, D.Belic, P.von Brentano, C.Fransen, A.Gade, H.von Garrel, J.Jolie, U.Kneissl, C.Kohstall, A.Linnemann, A.F.Lisetskiy, N.Pietralla, H.H.Pitz, M.Scheck, K.-H.Speidel, F.Stedile, S.W.Yates

Proton-neutron structure of the N = 52 nucleus 92Zr

NUCLEAR REACTIONS 92Zr(γ, γ'), E < 4.3 MeV; measured Eγ, Iγ. 92Zr deduced levels J, π, B(M1), B(E2), T1/2, mixed-symmetry state. Nuclear resonance fluorescence. Shell-model analysis.

doi: 10.1016/S0370-2693(02)02961-1
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2001AN13      Phys.Lett. 506B, 239 (2001)

W.Andrejtscheff, C.Kohstall, P.von Brentano, C.Fransen, U.Kneissl, N.Pietralla, H.H.Pitz

New Evidence for the E1 Core Polarization in Spherical Nuclei

COMPILATION 48Ca, 48Ti, 52Cr, 56Fe, 58,60Ni, 64,66Zn, 86,88Sr, 90Zr, 92,94,96Mo, 110,112,114,116Cd, 116,118,120,122,124Sn, 122,124,126,130Te, 134,136,138Ba, 140,142Ce, 142,144,146Nd, 144,148Sm; compiled, analyzed 2+, 3- and 1- level properties, B(E1), branching ratios; deduced dipole core polarization. Systematics for 1-states arising as double phonon coupling discussed, quasiparticle-phonon model calculations.

doi: 10.1016/S0370-2693(01)00340-9
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2001FR04      Acta Phys.Pol. B32, 777 (2001)

C.Fransen, P.von Brentano, A.Gade, V.Werner, N.Pietralla, U.Kneissl, H.H.Pitz

Identification of Mixed-Symmetry States in 94Mo

NUCLEAR STRUCTURE 94Mo; analyzed data; deduced levels, J, π, B(M1), mixed-symmetry states. Comparison with interacting boson model.


2001KN02      Prog.Part.Nucl.Phys. 46, 79 (2001)

U.Kneissl

Photoactivation and Photon-Scattering Experiments of Astrophysical Relevance

NUCLEAR REACTIONS 115In(γ, γ'), E=1.8, 3.0 MeV bremsstrahlung; Ta, 180,180mTa(γ, γ'), E=2.3 MeV bremsstrahlung; measured Eγ, Iγ. Astrophysical implications discussed.

doi: 10.1016/S0146-6410(01)00110-7
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2001KO49      Yad.Fiz. 64, No 6, 1217 (2001); Phys.Atomic Nuclei 64, 1141 (2001)

C.Kohstall, D.Belic, P.von Brentano, C.Fransen, R.-D.Herzberg, J.Jolie, U.Kneissl, H.Lehmann, A.Linnemann, P.Matschinsky, A.Nord, N.Pietralla, H.H.Pitz, M.Scheck, F.Stedile, V.Werner, S.W.Yates

Low-Lying Dipole Excitations in the Stable Cd Isotopes: A systematics

NUCLEAR REACTIONS 110,111,112,113,114,116Cd(γ, γ'), E=4.1 MeV bremsstrahlung; measured Eγ, Iγ, γ-ray polarization. 110,111,112,113,114,116Cd deduced levels, J, π, B(E1). Nuclear resonance fluorescence.

doi: 10.1134/1.1383631
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2001ST03      Phys.Rev. C63, 024320 (2001)

F.Stedile, E.Fill, D.Belic, P.von Brentano, C.Fransen, A.Gade, U.Kneissl, C.Kohstall, A.Linnemann, P.Matschinsky, A.Nord, N.Pietralla, H.H.Pitz, M.Scheck, V.Werner

Low-Lying Dipole Excitations in the Odd-Proton, Midshell Nucleus 103Rh

NUCLEAR REACTIONS 103Rh(γ, γ'), E=2.4, 4.1 MeV bremsstrahlung; measured Eγ, Iγ. 103Rh transitions deduced energies, widths, B(M1), B(E1), levels, dipole strength distribution, population inversion. Possble application to γ-ray laser discussed.

doi: 10.1103/PhysRevC.63.024320
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2001VO13      Nucl.Phys. A688, 237c (2001)

P.von Neumann-Cosel, C.Arlandini, D.Belic, J.Besserer, J.de Boer, J.J.Carroll, J.Enders, T.Hartmann, F.Kappeler, H.Kaiser, U.Kneissl, M.Loewe, H.J.Maier, H.Maser, P.Mohr, A.Nord, H.H.Pitz, A.Richter, M.Schumann, S.Volz, A.Zilges

Photoactivation of 180mTa and s-Process Nucleosynthesis of Nature's Rarest Naturally Occuring Isotope

NUCLEAR REACTIONS 180Ta(γ, γ'), E=0.8-3.1 MeV; measured Eγ, σ; deduced 180Ta effective half-life under s-process conditions.

doi: 10.1016/S0375-9474(01)00706-0
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2000BR05      Phys.Rev. C61, 024309 (2000)

J.Bryssinck, L.Govor, V.Yu.Ponomarev, F.Bauwens, O.Beck, D.Belic, P.von Brentano, D.De Frenne, T.Eckert, C.Fransen, K.Govaert, R.-D.Herzberg, E.Jacobs, U.Kneissl, H.Maser, A.Nord, N.Pietralla, H.H.Pitz, V.Werner

Systematic Study of Electric Quadrupole Excitations in the Stable Even Mass Sn Nuclei

NUCLEAR REACTIONS 116,118,120,122,124Sn(γ, γ'), E=4.1 MeV bremsstrahlung; measured Eγ, Iγ. 116,118,120,122,124Sn deduced levels J, π, B(E1), B(E2).

doi: 10.1103/PhysRevC.61.024309
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2000BR33      Phys.Rev. C62, 014309 (2000)

J.Bryssinck, L.Govor, V.Yu.Ponomarev, F.Bauwens, O.Beck, D.Belic, P.von Brentano, D.De Frenne, C.Fransen, R.-D.Herzberg, E.Jacobs, U.Kneissl, H.Maser, A.Nord, N.Pietralla, H.H.Pitz, V.Werner

Search for the Electric Dipole Excitations to the 3s1/2 (x) [21+ (x) 31-] Multiplet in 117Sn

NUCLEAR REACTIONS 117Sn(γ, γ'), E=4.1 MeV bremsstrahlung; measured Eγ, Iγ(θ). 117Sn deduced levels, widths, excitation B(E1). Comparison with quasiparticle phonon model calculations.

doi: 10.1103/PhysRevC.62.014309
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2000KN02      Trans.Bulg.Nucl.Soc. 5, 88 (2000)

U.Kneissl

The New Generation of Photon Scattering and Photoactivation Experiments in Nuclear Structure- and Astrophysics


2000KO47      Trans.Bulg.Nucl.Soc. 5, 179 (2000)

C.Kohstall, D.Belic, P.von Brentano, C.Fransen, R.-D.Herzberg, J.Jolie, U.Kneissl, H.Lehmann, A.Linnemann, P.Matschinsky, A.Nord, N.Pietralla, H.H.Pitz, V.Werner, S.W.Yates

Systematics of Dipole Excitations in the Stable 110, 111, 112, 113, 114, 116Cd Isotopes

NUCLEAR REACTIONS 110,111,112,113,114,116Cd(γ, γ'), E=4.3 MeV bremsstrahlung; measured Eγ, Iγ. 110,111,112,113,114,116Cd; deduced levels, dipole strength distributions. Comparison with model predictions.


1999BE65      Phys.Rev.Lett. 83, 5242 (1999)

D.Belic, C.Arlandini, J.Besserer, J.de Boer, J.J.Carroll, J.Enders, T.Hartmann, F.Kappeler, H.Kaiser, U.Kneissl, M.Loewe, H.J.Maier, H.Maser, P.Mohr, P.von Neumann-Cosel, A.Nord, H.H.Pitz, A.Richter, M.Schumann, S.Volz, A.Zilges

Photoactivation of 180Tam and Its Implications for the Nucleosynthesis of Nature's Rarest Naturally Occurring Isotope

NUCLEAR REACTIONS Ta, 180mTa(γ, γ'), E=0.8-3.1 MeV bremsstrahlung; measured ground-state production yield. Implications for s-process nucleosynthesis discussed. Enriched and natural targets.

doi: 10.1103/PhysRevLett.83.5242
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1999BR12      Phys.Rev. C59, 1930 (1999)

J.Bryssinck, L.Govor, D.Belic, F.Bauwens, O.Beck, P.von Brentano, D.De Frenne, T.Eckert, C.Fransen, K.Govaert, R.-D.Herzberg, E.Jacobs, U.Kneissl, H.Maser, A.Nord, N.Pietralla, H.H.Pitz, V.Yu.Ponomarev, V.Werner

Uniform Properties of Jπ = 1- Two-Phonon States in the Semimagic Even-Even Tin Isotopes 116, 118, 120, 122, 124Sn

NUCLEAR REACTIONS 116,118,120,122,124Sn(γ, γ'), E=4.1 MeV bremsstrahlung; measured Eγ, Iγ. 116,118,120,122,124Sn deduced levels, J, π, excitation B(M1), two-phonon excitations. Quasiparticle-phonon model calculations.

doi: 10.1103/PhysRevC.59.1930
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1999FR06      Phys.Rev. C59, 2264 (1999)

C.Fransen, B.Krischok, O.Beck, J.Besserer, P.von Brentano, T.Eckert, R.-D.Herzberg, U.Kneissl, J.Margraf, H.Maser, A.Nord, N.Pietralla, H.H.Pitz, A.Zilges

Low-Lying Dipole Excitations in the Transitional Nuclei 190, 192Os

NUCLEAR REACTIONS 190,192Os(γ, γ'), E=4 MeV bremsstrahlung; measured Eγ, Iγ(θ). 190,192Os deduced levels, J, π, B(M1), dipole excitation strength distribution, scissors mode. Comparison with IBM-2 predictions.

doi: 10.1103/PhysRevC.59.2264
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1999LE31      Phys.Rev. C60, 024308 (1999)

H.Lehmann, A.Nord, A.E.de Almeida Pinto, O.Beck, J.Besserer, P.von Brentano, S.Drissi, T.Eckert, R.-D.Herzberg, D.Jager, J.Jolie, U.Kneissl, J.Margraf, H.Maser, N.Pietralla, H.H.Pitz

Dipole Excitations in the Vibrational Nucleus 112Cd

NUCLEAR REACTIONS 112Cd(γ, γ'), E=4.1 MeV bremsstrahlung; measured Eγ, Iγ. 112Cd deduced levels, J, π, decay branching ratios, B(M1), B(E1). Nuclear resonance fluorescence technique. Comparison with IBM calculations.

doi: 10.1103/PhysRevC.60.024308
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1999PI07      Phys.Rev.Lett. 83, 1303 (1999)

N.Pietralla, C.Fransen, D.Belic, P.von Brentano, C.Friessner, U.Kneissl, A.Linnemann, A.Nord, H.H.Pitz, T.Otsuka, I.Schneider, V.Werner, I.Wiedenhover

Transition Rates between Mixed Symmetry States: First measurement in 94Mo

RADIOACTIVITY 94mTc(β+); measured Eγ, Iγ, γγ-coin following β-decay. 94Mo deduced transitions B(M1), B(E2), δ, mixed-symmetry states.

NUCLEAR REACTIONS 94Mo(γ, γ'), E=3.3, 4.0 MeV bremsstrahlung; measured Eγ, Iγ. 94Mo deduced transitions B(M1), B(E2), δ, mixed-symmetry states.

doi: 10.1103/PhysRevLett.83.1303
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1999PO22      Phys.Rev.Lett. 83, 4029 (1999)

V.Yu.Ponomarev, J.Bryssinck, L.Govor, F.Bauwens, O.Beck, D.Belic, P.von Brentano, D.De Frenne, C.Fransen, R.-D.Herzberg, E.Jacobs, U.Kneissl, H.Maser, A.Nord, N.Pietralla, H.H.Pitz, V.Werner

Strong Fragmentation of Low-Energy Electromagnetic Excitation Strength in 117Sn

NUCLEAR REACTIONS 117Sn(γ, γ'), E=4.1 MeV bremsstrahlung; measured Eγ, integral elastic σ. 117Sn deduced fragmentation of low-energy electromagnetic excitation strength. Comparison with microscopic calculations. Nuclear resonance fluorescence technique.

doi: 10.1103/PhysRevLett.83.4029
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1998EN01      Phys.Rev. C57, 996 (1998)

J.Enders, N.Huxel, U.Kneissl, P.von Neumann-Cosel, H.H.Pitz, A.Richter

Unresolved Dipole Strength in Spectra of the 157Gd(γ, γ') Reaction

NUCLEAR REACTIONS 157Gd(γ, γ'), E=4.1 MeV; analyzed γ spectra; deduced evidence for unresolved dipole strength. Fluctuation analysis.

doi: 10.1103/PhysRevC.57.996
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1998FR01      Phys.Rev. C57, 129 (1998)

C.Fransen, O.Beck, P.von Brentano, T.Eckert, R.-D.Herzberg, U.Kneissl, H.Maser, A.Nord, N.Pietralla, H.H.Pitz, A.Zilges

Systematics of Low-Lying Electric Dipole Excitations in the A ≈ 130-200 Mass Region

NUCLEAR STRUCTURE Z=56-76; compiled, analyzed low-lying B(E1) data; deduced shell, deformation effects.

doi: 10.1103/PhysRevC.57.129
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1998NO09      Phys.Rev. C57, 3459 (1998)

A.Nord, S.W.Yates, O.Beck, D.Belic, P.von Brentano, T.Eckert, C.Fransen, R.-D.Herzberg, U.Kneissl, H.Maser, N.Pietralla, H.H.Pitz, V.Werner

Low-Lying Dipole Strength in 207Pb

NUCLEAR REACTIONS 207Pb(γ, γ'), E=4.1 MeV bremsstrahlung; measured Eγ, Iγ. 207Pb deduced levels dipole strengths. Nuclear resonance flourescence technique.

doi: 10.1103/PhysRevC.57.3459
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1998PI03      Phys.Rev. C58, 184 (1998)

N.Pietralla, P.von Brentano, R.-D.Herzberg, U.Kneissl, N.Lo Iudice, H.Maser, H.H.Pitz, A.Zilges

Systematics of the Excitation Energy of the 1+ Scissors Mode and Its Empirical Dependence on the Nuclear Deformation Parameter

NUCLEAR STRUCTURE Z=56-78; analyzed scissors mode excitation energy; deduced deformation dependence.

doi: 10.1103/PhysRevC.58.184
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1998PI06      Phys.Rev. C58, 796 (1998)

N.Pietralla, D.Belic, P.von Brentano, C.Fransen, R.-D.Herzberg, U.Kneissl, H.Maser, P.Matschinsky, A.Nord, T.Otsuka, H.H.Pitz, V.Werner, I.Wiedenhover

Isovector Quadrupole Excitations in the Valence Shell of the Vibrator Nucleus 136Ba: Evidence from photon scattering experiments

NUCLEAR REACTIONS 136Ba(γ, γ'), E=4 MeV bremsstrahlung; measured Eγ, Iγ(θ). 136Ba deduced levels J, π, widths, B(λ).

NUCLEAR STRUCTURE 136Ba calculated levels, J, π, E2 strength distribution; deduced fragmentation of 2+ state. IBM-2, Q-phonon scheme.

doi: 10.1103/PhysRevC.58.796
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1998WO06      Phys.Rev. C58, 765 (1998)

A.Wolpert, O.Beck, D.Belic, J.Besserer, P.von Brentano, T.Eckert, C.Fransen, R.-D.Herzberg, U.Kneissl, J.Margraf, H.Maser, A.Nord, N.Pietralla, H.H.Pitz

Low-Lying Dipole Excitations in the Heavy, Odd-Mass Nucleus 181Ta

NUCLEAR REACTIONS 181Ta(γ, γ'), E=2.7, 4.1 MeV bremsstrahlung; measured Eγ, Iγ. 181Ta deduced levels, B(E1), B(M1), gΓ0. Nuclear resonance flourescence.

doi: 10.1103/PhysRevC.58.765
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1997BE43      Phys.Rev. C56, 1276 (1997)

J.Besserer, O.Beck, P.von Brentano, T.Eckert, R.-D.Herzberg, D.Jager, U.Kneissl, J.Margraf, H.Maser, A.Nord, N.Pietralla, H.H.Pitz, A.Zilges

Fragmentation of Low-Lying Dipole Strength in the Odd-Mass Nucleus 133Cs

NUCLEAR REACTIONS 133Cs(γ, γ'), E ≤ 4.1 MeV bremsstrahlung; measured Eγ, Iγ. 133Cs deduced levels, J, π, Γ0, B(M1), B(E1), dipole strength distributions. Nuclear resonance flourescence technique. Data from other nuclei compared.

doi: 10.1103/PhysRevC.56.1276
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1997EC01      Phys.Rev. C56, 1256 (1997); Erratum Phyhs.Rev. C57, 1007 (1998)

T.Eckert, O.Beck, J.Besserer, P.von Brentano, R.Fischer, R.-D.Herzberg, U.Kneissl, J.Margraf, H.Maser, A.Nord, N.Pietralla, H.H.Pitz, S.W.Yates, A.Zilges

Dipole Excitations in the Transitional Nucleus 144Nd Studied in Photon Scattering Experiments

NUCLEAR REACTIONS 144Nd(γ, γ'), E ≤ 4.1 MeV bremsstrahlung; measured Eγ, Iγ(θ). 144Nd deduced levels, J, π, Γ0, B(M1), B(E1), dipole strength distributions, two-phonon excitation. Nuclear resonance flourescence technique, data from other nuclei compared.

doi: 10.1103/PhysRevC.56.1256
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1997HE16      Phys.Rev. C56, 2484 (1997)

R.-D.Herzberg, C.Fransen, R.Fischer, O.Beck, D.Belic, J.Besserer, P.von Brentano, T.Eckert, U.Kneissl, B.Krischok, J.Margraf, H.Maser, A.Nord, N.Pietralla, H.H.Pitz, A.Wolpert, A.Zilges

Observation of an Octupole × Quasiparticle Band in 175Lu using Photon Scattering Experiments

NUCLEAR REACTIONS 175Lu(γ, γ'), E=2.6, 4.1 MeV bremsstrahlung; measured Eγ, Iγ. 175Lu deduced levels, J, π, branching ratios, B(E1) vs E, transition Γ, evidence for octupole vibration. Nuclear resonance fluorescence technique.

doi: 10.1103/PhysRevC.56.2484
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1997PI08      Nucl.Phys. A618, 141 (1997)

N.Pietralla, O.Beck, J.Besserer, P.von Brentano, T.Eckert, R.Fischer, C.Fransen, R.-D.Herzberg, D.Jager, R.V.Jolos, U.Kneissl, B.Krischok, J.Margraf, H.Maser, A.Nord, H.H.Pitz, M.Rittner, A.Schiller, A.Zilges

The Scissors Mode and Other Magnetic and Electric Dipole Excitations in the Transitional Nuclei 178,180Hf

NUCLEAR REACTIONS 178,180Hf(γ, γ'), E=4 MeV bremsstrahlung; measured Eγ, Iγ(θ). 178,180Hf deduced levels, J, decay widths, branching ratios, Γ0, B(λ). Scissors mode, M1 sum rules, electric dipole excitations, octupole vibrational bands, K-mixing. Nuclear resonance fluorescence technique.

doi: 10.1016/S0375-9474(97)00054-7
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1996MA18      Phys.Rev. C53, 2749 (1996)

H.Maser, S.Lindenstruth, I.Bauske, O.Beck, P.von Brentano, T.Eckert, H.Friedrichs, R.D.Heil, R.-D.Herzberg, A.Jung, U.Kneissl, J.Margraf, N.Pietralla, H.H.Pitz, C.Wesselborg, A.Zilges

Systematics of Low-Lying Dipole Excitations in the Deformed Even-Even Nuclei 164,166,168,170Er

NUCLEAR REACTIONS 164,166,168,170Er(γ, γ'), E ≤ 4.1 MeV bremsstrahlung; measured Eγ, Iγ, asymmetry. 164,166,168,170Er deduced levels, J, π, K, Γ0, B(λ). Enriched targets.

doi: 10.1103/PhysRevC.53.2749
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1996MA55      Phys.Rev. C54, R2129 (1996)

H.Maser, N.Pietralla, P.von Brentano, R.-D.Herzberg, U.Kneissl, J.Margraf, H.H.Pitz, A.Zilges

Observation of the 1+ Scissors Mode in the γ-Soft Nucleus 134Ba

NUCLEAR REACTIONS 134Ba(γ, γ'), E ≤ 4.1 MeV bremsstrahlung; measured Eγ, Iγ, σ(E, θ), γ polarization. 134Ba deduced levels, J, π, B(λ), radiative width ratios. Ge(Li) detector, Compton polarimeter. Sum rule, interacting boson model.

doi: 10.1103/PhysRevC.54.R2129
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1996NO10      Phys.Rev. C54, 2287 (1996)

A.Nord, A.Schiller, T.Eckert, O.Beck, J.Besserer, P.von Brentano, R.Fischer, R.-D.Herzberg, D.Jager, U.Kneissl, J.Margraf, H.Maser, N.Pietralla, H.H.Pitz, M.Rittner, A.Zilges

Systematic Study of the Fragmentation of Low-Lying Dipole Strength in Odd-A Rare Earth Nuclei Investigated in Nuclear Resonance Fluorescence Experiments

NUCLEAR REACTIONS 155Gd, 159Tb(γ, γ'), E ≤ 4.1 MeV bremsstrahlung; measured Eγ, Iγ. 155Gd, 159Tb deduced levels, (gΓ0), B(λ). Enriched targets. Other nuclei dipole fragmentation data considered.

doi: 10.1103/PhysRevC.54.2287
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1996ZI02      Nucl.Phys. A599, 147c (1996)

A.Zilges, P.von Brentano, R.-D.Herzberg, U.Kneissl, J.Margraf, H.H.Pitz

Observation of Magnetic and Electric Dipole Excitations Below Neutron Threshold in Photon Scattering Experiments

NUCLEAR REACTIONS 142Nd, 140Ce, 138Ba(γ, γ'), E ≤ 4.2 MeV; analyzed γ spectra. 142Nd, 140Ce, 138Ba levels deduced strong E1 transitions, configuration.

doi: 10.1016/0375-9474(96)00056-5
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1995HE05      Phys.Rev. C51, 1226 (1995)

R.-D.Herzberg, A.Zilges, A.M.Oros, P.von Brentano, U.Kneissl, J.Margraf, H.H.Pitz, C.Wesselborg

Observation of Dipole Transitions to a 2+ (x) 3- (x) Particle Multiplet in 143Nd

NUCLEAR REACTIONS 143Nd(γ, γ'), E=4.1 MeV bremsstrahlung; measured Eγ, Iγ. 143Nd levels deduced T1/2, B(λ), Γγ, summed dipole strength, configuration. Model comparison.

doi: 10.1103/PhysRevC.51.1226
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1995HE25      Nucl.Phys. A592, 211 (1995)

R.-D.Herzberg, I.Bauske, P.von Brentano, Th.Eckert, R.Fischer, W.Geiger, U.Kneissl, J.Margraf, H.Maser, N.Pietralla, H.H.Pitz, A.Zilges

Lifetimes of Two-Phonon 1- States in Even N = 82 Nuclei

NUCLEAR REACTIONS 138Ba(γ, γ'), 140Ce(γ, γ'), E=4.1 MeV bremsstrahlung; measured Eγ, Iγ. 138Ba, 140Ce deduced levels, J, decay width, branching ratios, Γ0, B(λ), T1/2, configuration. Nuclear resonance fluorescence technique. Two-phonon, 2+ (x) 3- states in N=82 nuclei reviewed.

doi: 10.1016/0375-9474(95)00303-I
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1995JU01      Nucl.Phys. A584, 103 (1995)

A.Jung, S.Lindenstruth, H.Schacht, B.Starck, R.Stock, C.Wesselborg, R.D.Heil, U.Kneissl, J.Margraf, H.H.Pitz, F.Steiper

Electric and Magnetic Dipole Excitations to Bound States in 70,72,74,76Ge

NUCLEAR REACTIONS 70,72,74,76Ge(γ, γ'), E=4, 10 MeV bremsstrahlung; 70,72,74,76Ge(polarized γ, γ'), E=9-14 MeV bremsstrahlung; measured γγ(θ), σ(θ, φ), Iγ. 70,72,74,76Ge deduced levels, J, Γ0, π, reduced transition probabilities, B(E1), B(M1). Enriched targets, partially linearly polarized beam.

doi: 10.1016/0375-9474(94)00626-X
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1995MA69      Phys.Rev. C52, 2429 (1995)

J.Margraf, T.Eckert, M.Rittner, I.Bauske, O.Beck, U.Kneissl, H.Maser, H.H.Pitz, A.Schiller, P.von Brentano, R.Fischer, R.-D.Herzberg, N.Pietralla, A.Zilges, H.Friedrichs

Systematics of Low-Lying Dipole Strengths in Odd and Even Dy and Gd Isotopes

NUCLEAR REACTIONS 160,162,164,161,163Dy, 160,156,157,158Gd(γ, γ'), E=4 MeV bremsstrahlung; measured Eγ, Iγ, γ asymmetry in some cases. 164,162,161,163,160Dy, 157Gd deduced levels, J, π, K, Γ0, B(λ). Enriched targets.

doi: 10.1103/PhysRevC.52.2429
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1995PI02      Phys.Rev. C51, 1021 (1995)

N.Pietralla, I.Bauske, O.Beck, P.von Brentano, W.Geiger, R.-D.Herzberg, U.Kneissl, J.Margraf, H.Maser, H.H.Pitz, A.Zilges

Absolute Level Widths in 27Al Below 4 MeV

NUCLEAR REACTIONS 27Al(γ, γ'), E < 4.2 MeV bremsstrahlung; measured Eγ, nuclear self absorption. 27Al deduced level widths, Γ, T1/2.

doi: 10.1103/PhysRevC.51.1021
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1995PI12      Phys.Rev. C52, R2317 (1995)

N.Pietralla, P.von Brentano, R.-D.Herzberg, U.Kneissl, J.Margraf, H.Maser, H.H.Pitz, A.Zilges

Correlation between Low-Lying M1 and E2 Strength in Heavy Rare Earth Nuclei

NUCLEAR STRUCTURE 142,146,148Nd, 144,148,150,152Sm, 154,156,158,160Gd, 160,162,164Dy, 164,166,168,170Er, 172,174,176Yb, 178Hf, 182,184,186W; analyzed B(M1); deduced deformation dependence of M1 transition strength, M1-E2 correlation, collectivity. Rare earth nuclei, scissors mode.

doi: 10.1103/PhysRevC.52.R2317
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1995ZI02      Phys.Rev. C52, R468 (1995)

A.Zilges, P.von Brentano, R.-D.Herzberg, U.Kneissl, J.Margraf, H.Maser, N.Pietralla, H.H.Pitz

Strong Dipole Excitations Around 1.8 MeV in 238U

NUCLEAR REACTIONS 238U(γ, γ'), E=1.5-2.0 MeV; measured Eγ, Iγ. 238U deduced levels, J, π, γ-multipolarity, K-quantum number, γ-branching, Γ0, T1/2, B(λ). High resolution strudy.

doi: 10.1103/PhysRevC.52.R468
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1994FR03      Nucl.Phys. A567, 266 (1994)

H.Friedrichs, D.Hager, P.von Brentano, R.D.Heil, R.-D.Herzberg, U.Kneissl, J.Margraf, G.Muller, H.H.Pitz, B.Schlitt, M.Schumacher, C.Wesselborg, A.Zilges

Low-Lying E1 and M1 Strengths in the Deformed Nucleus 160Gd

NUCLEAR REACTIONS 160Gd(γ, γ'), E=3.7 MeV bremsstrahlung; measured Eγ, Iγ, linear polarization, asymmetry. 160Gd deduced levels, J, π, K, Γ0, (Γ0)2/Γ, B(λ). Enriched target.

doi: 10.1016/0375-9474(94)90148-1
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1994FR19      Z.Phys. A350, 249 (1994)

Th.Frommhold, F.Steiper, W.Henkel, U.Kneissl, J.Ahrens, R.Beck, J.Peise, M.Schmitz, I.Anthony, J.D.Kellie, S.J.Hall, G.J.Miller

Photofission of 235U and 238U at Intermediate Energies: Absolute cross sections and fragment mass distributions

NUCLEAR REACTIONS, ICPND 238,235U(γ, F), E=50-800 MeV; measured total fission σ(E), fragment mass distributions. 4π arrangement, position sensitive fragment detectors.

doi: 10.1007/BF01289589
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1994GE07      Nucl.Phys. A580, 263 (1994)

W.Geiger, Zs.Nemeth, I.Bauske, P.von Brentano, R.D.Heil, R.-D.Herzberg, U.Kneissl, J.Margraf, H.Maser, N.Pietralla, H.H.Pitz, C.Wesselborg, A.Zilges

Low-Lying Dipole Excitations in the Isotopes 113,114Cd

NUCLEAR REACTIONS 113,114Cd(γ, γ'), E=4.3 MeV bremsstrahlung; measured Eγ, Iγ. 113,114Cd deduced levels, J, π, Γ0, B(E1), (Γ0)2/Γ. Enriched targets.

doi: 10.1016/0375-9474(94)90773-0
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1994GO25      Phys.Lett. 335B, 113 (1994)

K.Govaert, L.Govor, E.Jacobs, D.De Frenne, W.Mondelaers, K.Persyn, M.L.Yoneama, U.Kneissl, J.Margraf, H.H.Pitz, K.Huber, S.Lindenstruth, R.Stock, K.Heyde, A.Vdovin, V.Yu.Ponomarev

Observation of a 1- Two Phonon 2+ (x) 3- Excitation in 116Sn and 124Sn

NUCLEAR REACTIONS 116,124Sn(γ, γ'), E=4.1, 10 MeV bremsstrahlung; 116,124Sn(polarized γ, γ'), E=12 MeV bremsstrahlung; measured Eγ, Iγ, asymmetry. 116,124Sn deduced levels, J, π, γ-multipolarity, B(λ), configuration, widths, ratio. Quasiparticle RPA. Linearly polarized beam.

doi: 10.1016/0370-2693(94)91400-1
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1994GO36      Nucl.Instrum.Methods Phys.Res. A337, 265 (1994)

K.Govaert, W.Mondelaers, E.Jacobs, D.De Frenne, K.Persyn, S.Pomme, M.-L.Yoneama, S.Lindenstruth, K.Huber, A.Jung, B.Starck, R.Stock, C.Wesselborg, R.-D.Heil, U.Kneissl, H.H.Pitz

Polarised Bremsstrahlung Nuclear Resonance Fluorescence Set-Up at the 15 MeV Linac in Gent

NUCLEAR REACTIONS 56Fe(polarized γ, γ'), E ≈ 6.8-9.6 MeV bremsstrahlung; measured asymmetry. 56Fe deduced dipole transitions B(λ).

doi: 10.1016/0168-9002(94)91094-4
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1994MO18      Phys.Rev. C50, 2222 (1994)

R.Moreh, O.Beck, U.Kneissl, J.Margraf, H.Maser, H.H.Pitz, R.-D.Herzberg, N.Pietralla, A.Zilges

Width of the 3841-keV Level in 17O

NUCLEAR REACTIONS 17O(γ, γ'), E=4.7 MeV bremsstrahlung; measured scattering σ. 17O level deduced Γ. Enriched target.

doi: 10.1103/PhysRevC.50.2222
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1994SC37      Nucl.Instrum.Methods Phys.Res. A337, 416 (1994)

B.Schlitt, U.Maier, H.Friedrichs, S.Albers, I.Bauske, P.von Brentano, R.D.Heil, R.-D.Herzberg, U.Kneissl, J.Margraf, H.H.Pitz, C.Wesselborg, A.Zilges

A Sectored Ge-Compton Polarimeter for Parity Assignments in Photon Scattering Experiments

NUCLEAR REACTIONS 24Mg(p, p'γ), E=2.47, 6 MeV; 28Si(p, p'γ), E=3.1 MeV; 12C(p, p'γ), E=5.375 MeV; analyzed γ polarization data.

doi: 10.1016/0168-9002(94)91111-8
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1994VO19      Nucl.Phys. A577, 191c (1994)

P.von Brentano, A.Zilges, R.-D.Herzberg, U.Kneissl, J.Margraf, H.H.Pitz

Investigation of Low Lying Electric and Magnetic Dipole Excitations in Heavy Nuclei

NUCLEAR STRUCTURE A=140-185; compiled, analyzed B(λ) other data. 140Ce, 142,148,150Nd, 156,158,160Gd, 160,162,164Dy, 166,168,170Er, 172,174Yb; compiled, analyzed electric dipole strength distribution.

doi: 10.1016/0375-9474(94)90854-0
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1993BA24      Phys.Rev.Lett. 71, 975 (1993)

I.Bauske, J.M.Arias, P.von Brentano, A.Frank, H.Friedrichs, R.D.Heil, R.-D.Herzberg, F.Hoyler, P.Van Isacker, U.Kneissl, J.Margarf, H.H.Pitz, C.Wesselborg, A.Zilges

First Observation of Scissors Mode States in an Odd-Mass Nucleus

NUCLEAR REACTIONS 163Dy(γ, γ'), E=1.942-3.107 MeV bremsstrahlung; measured integrated scattering σ, γ-spectra. 163Dy levels deduced B(λ), gΓ0, Γ10. Interacting boson-fermion model.

doi: 10.1103/PhysRevLett.71.975
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1993FR06      Nucl.Phys. A553, 553c (1993)

H.Friedrichs, S.Lindenstruth, B.Schlitt, C.Wesselborg, I.Bauske, R.D.Heil, U.Kneissl, J.Margraf, H.H.Pitz, D.Hager, G.Muller, M.Schumacher, P.von Brentano, R.D.Herzberg, A.Zilges

Identification of Strong E1 and M1 Groundstate Transitions in Deformed Rare Earth Nuclei

NUCLEAR REACTIONS 160Gd, 162Dy(γ, γ'), E=4.3 MeV bremsstrahlung; measured γ asymmetry. 150Nd, 160Gd, 162Dy deduced transition γ-multipolarity, B(λ), levels, widths.

doi: 10.1016/0375-9474(93)90658-K
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1993HE15      Nucl.Phys. A563, 445 (1993)

R.-D.Herzberg, A.Zilges, P.von Brentano, R.D.Heil, U.Kneissl, J.Margraf, H.H.Pitz, H.Friedrichs, S.Lindenstruth, C.Wesselborg

Investigation of Low-Lying Dipole Excitations in 182,184,186W(*)

NUCLEAR REACTIONS 182,184,186W(γ, γ'), E ≈ 2.9-3.7 MeV bremsstrahlung; measured Eγ, Iγ. 182,184,186W deduced levels, J, decay width ratio, Γ0, B(λ), K. Nuclear reasonance fluorescence technique.

doi: 10.1016/0375-9474(93)90122-E
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1993KN01      Phys.Rev.Lett. 71, 2180 (1993)

U.Kneissl, A.Zilges, J.Margraf, I.Bauske, P.von Brentano, H.Friedrichs, R.D.Heil, R.-D.Herzberg, H.H.Pitz, B.Schlitt, C.Wesselborg

First Experimental Evidence for Two-Phonon Octupole-γ-Vibrational Excitations in Deformed Nuclei

NUCLEAR STRUCTURE 156,158Gd, 168Er, 172Yb; calculated levels, B(λ). 150Nd, 156,158Gd, 162,164Dy, 166,168Er, 172Yb; analyzed data; deduced two-phonon excitation role. Interacting sdf-boson approximation, dynamic collective models.

doi: 10.1103/PhysRevLett.71.2180
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1993MA08      Phys.Rev. C47, 1474 (1993)

J.Margraf, R.D.Heil, U.Kneissl, U.Maier, H.H.Pitz, H.Friedrichs, S.Lindenstruth, B.Schlitt, C.Wesselborg, P.von Brentano, R.-D.Herzberg, A.Zilges

Deformation Dependence of Low Lying M1 Strengths in Even Nd Isotopes

NUCLEAR REACTIONS 146Nd(γ, γ'), E ≈ 4 MeV; measured γ linear polarization, azimuthal asymmetry. 142,146,148,150Nd levels deduced B(λ), J, π, Γ, deformation dependence of M1 transition strengths.

doi: 10.1103/PhysRevC.47.1474
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1993MO23      Phys.Rev. C48, 2625 (1993)

R.Moreh, O.Beck, I.Bauske, W.Geiger, R.D.Heil, U.Kneissl, J.Margraf, H.Maser, H.H.Pitz

Precise Widths of the 3089 and 3684 keV Levels in 13C

NUCLEAR REACTIONS 13C(γ, γ'), E=4.7 MeV bremsstrahlung; measured precise Eγ, Iγ. 13C levels deduced Γ0. Self-absorption technique, enriched target, amorphous 13C absorbers.

doi: 10.1103/PhysRevC.48.2625
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1993ST18      Nucl.Phys. A563, 282 (1993)

F.Steiper, Th.Frommhold, W.Henkel, A.Jung, U.Kneissl, R.Stock

Mass Dependence of Fragment Angular Distributions in the Fission of 232Th and 236U Induced by Polarized Photons

NUCLEAR REACTIONS 232Th, 236U(polarized γ, F), E=9-12 MeV bremsstrahlung; measured fission fragment mass, energy, σ(θ), azimuthal asymmetry; deduced angular correlation coefficients, contributions of odd harmonics, fission channels, contributions of exit channel modes. Double-humped fission, multi-exit fission channel concepts.

doi: 10.1016/0375-9474(93)90605-W
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1993VO05      Nucl.Phys. A557, 593c (1993)

P.von Brentano, A.Zilges, R.D.Heil, R.D.Herzberg, U.Kneissl, H.H.Pitz, C.Wesselborg

Low Energy Electric Dipole Modes in Nuclei Around N = 82

NUCLEAR REACTIONS 143,142Nd(γ, γ'), E=2.6-3.6 MeV; 141Pr(γ, γ'), E not given; measured Eγ, Iγ; analyzed data. 141Pr, 142,143Nd deduced E1 excitation strength, B(E1), configuration. sdf-interacting boson model.

doi: 10.1016/0375-9474(93)90572-F
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1993ZI03      Phys.Rev.Lett. 70, 2880 (1993)

A.Zilges, R.-D.Herzberg, P.von Brentano, F.Donau, R.D.Heil, R.V.Jolos, U.Kneissl, J.Margraf, H.H.Pitz, C.Wesselborg

First Identification of Dipole Excitations to a 2+ (x) 3- (x) Particle Multiplet in an Odd-A Nucleus

NUCLEAR REACTIONS 143Nd(γ, γ'), E ≤ 4 MeV bremsstrahlung; measured Eγ, Iγ. 143Nd deduced levels, transition γ-multipolarity, B(λ), configuration.

doi: 10.1103/PhysRevLett.70.2880
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1992FR02      Phys.Rev. C45, R892 (1992)

H.Friedrichs, B.Schlitt, J.Margraf, S.Lindenstruth, C.Wesselborg, R.D.Heil, H.H.Pitz, U.Kneissl, P.von Brentano, R.D.Herzberg, A.Zilges, D.Hager, G.Muller, M.Schumacher

Evidence for Enhanced Electric Dipole Excitations in Deformed Rare Earth Nuclei Near 2.5 MeV

NUCLEAR REACTIONS 150Nd, 162Dy(γ, γ'), E ≤ 2.8 MeV bremsstrahlung; measured Eγ, Iγ, asymmetry, linear polarization. 150Nd, 162Dy deduced levels, J, π, Γ0, (Γ0)2/Γ, K-quantum number, B(λ).

doi: 10.1103/PhysRevC.45.R892
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1992FR16      Phys.Lett. 295B, 28 (1992)

Th.Frommhold, F.Steiper, W.Henkel, U.Kneissl, J.Ahrens, R.Beck, J.Peise, M.Schmitz

Total Photofission Cross Section for 238U as a Substitute for the Photon Absorption Cross Section in the Energy Range of the First Baryon Resonances

NUCLEAR REACTIONS 238U(γ, F), E=50-800 MeV; measured total fission σ(E) in resonance region. Monochromatic tagged photons, sophisticated 4π-arrangement of position sensitive fragment detectors.

doi: 10.1016/0370-2693(92)90084-H
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1992MA01      Phys.Rev. C45, R521 (1992)

J.Margraf, C.Wesselborg, R.D.Heil, U.Kneissl, H.H.Pitz, C.Rangacharyulu, A.Richter, H.J.Wortche, W.Ziegler

Saturation of B(E2) and B(M1) Strength in Actinide Nuclei

NUCLEAR STRUCTURE Z=82, 126; N=126, 184; analyzed B(λ); deduced saturation features, boson g-factor differences. Shell closure, analytical formula.

doi: 10.1103/PhysRevC.45.R521
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1991LI12      Nucl.Instrum.Methods Phys.Res. A300, 293 (1991)

S.Lindenstruth, A.Degener, R.D.Heil, A.Jung, U.Kneissl, J.Margraf, H.H.Pitz, H.Schacht, U.Seemann, R.Stock, C.Wesselborg

Measurements and Simulations of Low Energy, Thick Target Bremsstrahlung Spectra

NUCLEAR REACTIONS 13C, 23Na, 27Al, 31P, 35Cl, 48Ti(γ, γ'), E=4.1 MeV bremsstrahlung; measured Eγ, Iγ. Nuclear resonance fluorescence technique, Monte Carlo simulations.

doi: 10.1016/0168-9002(91)90439-W
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1991WE03      Nucl.Phys. A522, 443 (1991)

Th.Weber, U.Kneissl, W.Pecho, A.Degener, K.Huber, K.Schaschek, W.Wilke

Fragment Angular Distributions in Electron- and Positron-Induced Fission of 232Th. A Specific Test of Virtual Photon Spectra

NUCLEAR REACTIONS 232Th(e, F), E=8-16 MeV; measured fission fragment σ(θ); deduced angular correlation coefficients, fission channels. Virtual photon spectra tests.

doi: 10.1016/0375-9474(91)90075-H
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1991ZI01      Z.Phys. A340, 155 (1991)

A.Zilges, P.von Brentano, H.Friedrichs, R.D.Heil, U.Kneissl, S.Lindenstruth, H.H.Pitz, C.Wesselborg

A Survey of ΔK = 0 Dipole Transitions from Low Lying J = 1 States in Rare Earth Nuclei

NUCLEAR REACTIONS 150Nd, 156,158,160Gd, 160,162,164Dy, 170,166,168Er, 172,174Yb(γ, γ'), E not given; analyzed data. 150Nd, 156,158,160Gd, 160,162,164Dy, 170,166,168Er, 172,174Yb levels deduced reduced width, B(E1), ΔK=0 transition features.

doi: 10.1007/BF01303826
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1990DE20      Nucl.Phys. A513, 29 (1990)

A.Degener, C.Blasing, R.D.Heil, A.Jung, U.Kneissl, H.H.Pitz, H.Schacht, S.Schennach, R.Stock, C.Wesselborg

Dipole Excitations in 48Ti Studied by Nuclear Resonance Fluorescence

NUCLEAR REACTIONS 48Ti(γ, γ'), E=4.1-14 MeV bremsstrahlung; measured Eγ, Iγ, γ(θ), azimuthal asymmetries. 48Ti deduced levels, J, π, Γ0, reduced transition probabilities. Enriched target, partially polarized, unpolarized beam, nuclear resonance fluorescence experiment.

doi: 10.1016/0375-9474(90)90340-R
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1990HE03      Nucl.Phys. A506, 223 (1990)

R.D.Heil, B.Kasten, W.Scharfe, P.A.Butler, H.Friedrichs, S.D.Hoblit, U.Kneissl, S.Lindenstruth, M.Ludwig, G.Muller, H.H.Pitz, K.W.Rose, M.Schumacher, U.Seemann, J.Simpson, P.von Brentano, Th.Weber, C.Wesselborg, A.Zilges

Parity Assignments in Nuclear Resonance Fluorescence Experiments Using Compton Polarimeters

NUCLEAR REACTIONS 142,150Nd, 232Th(γ, γ'), E=4.1 MeV bremsstrahlung; measured Eγ, Iγ, asymmetry, linear polarization. 142,150Nd, 232Th deduced levels, J, π, Γ0, (Γ0)20.

doi: 10.1016/0375-9474(90)90384-X
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1990MA43      Phys.Rev. C42, 771 (1990)

J.Margraf, A.Degener, H.Friedrichs, R.D.Heil, A.Jung, U.Kneissl, S.Lindenstruth, H.H.Pitz, H.Schacht, U.Seemann, R.Stock, C.Wesselborg, P.von Brentano, A.Zilges

Photoexcitation of Low-Lying Dipole Transitions in 236U

NUCLEAR REACTIONS 236U(γ, γ'), E=3.9 MeV bremsstrahlung; measured Eγ, Iγ, γ(θ). 236U deduced levels, (Γ02)/Γ, J, K, branching ratios.

doi: 10.1103/PhysRevC.42.771
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetG0027.


1990PI04      Nucl.Phys. A509, 587 (1990); Errata Nucl.Phys. A514, 749 (1990)

H.H.Pitz, R.D.Heil, U.Kneissl, S.Lindenstruth, U.Seemann, R.Stock, C.Wesselborg, A.Zilges, P.von Brentano, S.D.Hoblit, A.M.Nathan

Low-Energy Photon Scattering Off 142, 146, 148, 150Nd: An investigation in the mass region of a nuclear shape transition

NUCLEAR REACTIONS 142,146,148,150Nd(γ, γ'), E=4.1 MeV bremsstrahlung; measured Eγ, Iγ, γ(θ). 142,146,148,150Nd deduced levels, J, π, Γ0, B(λ). Enriched targets.

doi: 10.1016/0375-9474(90)90092-Z
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1990WE07      Nucl.Phys. A510, 1 (1990)

Th.Weber, R.D.Heil, U.Kneissl, W.Wilke, Th.Kihm, K.T.Knopfle, H.J.Emrich

(e, e'f) Coincidence Experiments on 235U and 238U

NUCLEAR REACTIONS 235,238U(e, e'F), E=78-183 MeV; measured σ(θ(e'), E, θ(fragment)), in-, out-of-plane fission fragment σ(θ), fragment time-of-flight differences. 235,238U deduced multipole strength distributions for giant E0, E1, E2, E3 resonances, fission characteristics.

doi: 10.1016/0375-9474(90)90286-U
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1990WI15      Phys.Rev. C42, 2148 (1990)

W.Wilke, U.Kneissl, Th.Weber, H.Stroher, L.S.Cardman, P.T.Debevec, S.D.Hoblit, R.T.Jones, A.M.Nathan

Photofission of 238U with Monochromatic Gamma Rays in the Energy Range 11-16 MeV

NUCLEAR REACTIONS 238U(γ, F), E=11-16 MeV; measured fission fragment σ(θ), fragment mass distributions; deduced anisotropy, fragment mass asymmetry relationship.

doi: 10.1103/PhysRevC.42.2148
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1990ZI01      Nucl.Phys. A507, 399 (1990)

A.Zilges, P.von Brentano, C.Wesselborg, R.D.Heil, U.Kneissl, S.Lindenstruth, H.H.Pitz, U.Seemann, R.Stock

Observation of Low-Lying Collective Dipole Transitions in the Rare-Earth Nuclei 172,174,176Yb

NUCLEAR REACTIONS 172,174,176Yb(γ, γ'), E=4.1 MeV bremsstrahlung; measured Eγ, Iγ. 172,174,176Yb deduced levels, J, Γ0, B(λ).

doi: 10.1016/0375-9474(90)90300-B
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1990ZI05      Phys.Rev. C42, 1945 (1990)

A.Zilges, P.von Brentano, A.Richter, R.D.Heil, U.Kneissl, H.H.Pitz, C.Wesselborg

Uncommon Decay Branching Ratios of Spin-One States in the Rare-Earth Region and Evidence for K Mixing

NUCLEAR STRUCTURE 150Nd, 156,158,160Gd, 160,162,164Dy, 166Er, 172,174,176Yb; analyzed B(λ), branching ratios; deduced Alaga-rules validity, K-mixing.

doi: 10.1103/PhysRevC.42.1945
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1989KA16      Phys.Rev.Lett. 63, 609 (1989); Erratum Phys.Rev.Lett. 63, 2695 (1989)

B.Kasten, R.D.Heil, P.v.Brentano, P.A.Butler, S.D.Hoblit, U.Kneissl, S.Lindenstruth, G.Muller, H.H.Pitz, K.W.Rose, W.Scharfe, M.Schumacher, U.Seemann, Th.Weber, C.Wesselborg, A.Zilges

Evidence for a Cluster of Collective 1+ States in 150Nd Near 3 MeV

NUCLEAR REACTIONS 150Nd(γ, γ'), E=2.8-3.1 MeV bremsstrahlung; measured Eγ, Iγ, γ linear polarization, asymmetry. 150Nd deduced levels, J, π, B(λ), (Γ02/Γ). Compton polarimeters.

doi: 10.1103/PhysRevLett.63.609
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1989PI05      Nucl.Phys. A492, 411 (1989)

H.H.Pitz, U.E.P.Berg, R.D.Heil, U.Kneissl, R.Stock, C.Wesselborg, P.von Brentano

Systematic Study of Low-Lying Dipole Excitations in 156,158,160Gd by Photon Scattering

NUCLEAR REACTIONS 156,158,160Gd(γ, γ'), E=3.5-4.1 MeV bremsstrahlung; measured Eγ, Iγ. 156,158,160Gd deduced levels, J, Γ0, reduced transition probabilities.

doi: 10.1016/0375-9474(89)90405-3
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1989WE01      Phys.Rev.Lett. 62, 129 (1989)

Th.Weber, R.D.Heil, U.Kneissl, W.Wilke, H.J.Emrich, Th.Kihm, K.T.Knopfle

Evidence for Different Mass Splits in Fission Decays of Giant Multipole Resonances from 235,238U(e, e'f) Reactions

NUCLEAR REACTIONS 235,238U(e, e'F), E=185 MeV; measured fission (fragment)(fragment)-coin. 235,238U deduced giant multipole resonance fission decay features, Γ(S)/Γ(A).

doi: 10.1103/PhysRevLett.62.129
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1989WE02      Phys.Rev.Lett. 62, 690 (1989)

Th.Weber, U.Kneissl, Th.Kihm, K.T.Knopfle

Weber et al. Reply

doi: 10.1103/PhysRevLett.62.690
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1989WE12      Nucl.Phys. A502, 279c (1989)

Th.Weber, W.Wilke, H.J.Emrich, R.D.Heil, Th.Kihm, U.Kneissl, K.T.Knopfle, U.Seemann, F.Steiper, H.Stroher

Evidence for Different Fission Fragment Mass Asymmetries for Specific Nuclear Excitations Studied in (e, e'F) and (γ, F) Reactions

NUCLEAR REACTIONS 236U(e, e'F), E not given; measured fission fragment σ(θ). 235,238U(e, e'F), E=185 MeV; measured fission fragment spectra; deduced symmetric, asymmetric fission yield ratios, excitation multipolarity role.

doi: 10.1016/0375-9474(89)90668-4
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1988HE02      Nucl.Phys. A476, 39 (1988)

R.D.Heil, H.H.Pitz, U.E.P.Berg, U.Kneissl, K.D.Hummel, G.Kilgus, D.Bohle, A.Richter, C.Wesselborg, P.von Brentano

Observation of Orbital Magnetic Dipole Strength in the Actinide Nuclei 232Th and 238U

NUCLEAR REACTIONS 232Th, 238U(e, e'), E=20.2-55.9 MeV; measured σ(E(e-)), θ=165°. 232Th, 238U(γ, γ'), E=2.9-4.1 MeV bremsstrahlung; measured Eγ, Iγ. 232Th, 238U deduced levels, J, π, B(M1), transition form factors.

doi: 10.1016/0375-9474(88)90371-5
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetG0028.


1988WE10      Phys.Lett. 207B, 22 (1988)

C.Wesselborg, P.Von Brentano, K.O.Zell, R.D.Heil, H.H.Pitz, U.E.P.Berg, U.Kneissl, S.Lindenstruth, U.Seemann, R.Stock

Photoexcitation of Dipole Modes in 160,162,164Dy

NUCLEAR REACTIONS 160,162,164Dy(γ, γ'), E=2.2-3.2 MeV bremsstrahlung; measured γ-spectra. 160,162,164Dy deduced levels, J, π, B(M1), width parameters. Nuclear resonance fluorescence.

doi: 10.1016/0370-2693(88)90878-7
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