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NSR database version of April 27, 2024.

Search: Author = U.J.van Severen

Found 22 matches.

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2001GO06      Nucl.Phys. A683, 108 (2001)

A.Gorgen, N.Nenoff, H.Hubel, G.Baldsiefen, J.A.Becker, A.P.Byrne, S.Chmel, R.M.Clark, M.A.Deleplanque, R.M.Diamond, P.Fallon, K.Hauschild, I.M.Hibbert, W.Korten, R.Krucken, I.Y.Lee, A.O.Macchiavelli, E.S.Paul, U.J.van Severen, F.S.Stephens, K.Vetter, R.Wadsworth, A.N.Wilson, J.N.Wilson

Magnetic Rotation in ¹⁹⁷Pb and ¹⁹⁸Pb

NUCLEAR REACTIONS ¹⁸⁶W(¹⁸O, 6n), (¹⁸O, 7n), E=104, 110, 115 MeV; measured Eγ, Iγ, γγ-coin, linear polarization. ^197,198Pb deduced high-spin levels, J, π, B(M1)/B(E2), magnetic dipole bands, magnetic rotation. Level systematics in neighboring nuclides discussed. Gammasphere and Eurogam arrays.

doi: 10.1016/S0375-9474(00)00470-X
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1999DO34      Nucl.Phys. A660, 381 (1999)

J.Domscheit, S.Tormanen, B.Aengenvoort, H.Hubel, R.A.Bark, M.Bergstrom, A.Bracco, R.Chapman, D.M.Cullen, C.Fahlander, S.Frattini, A.Gorgen, G.B.Hagemann, A.Harsmann, B.Herskind, H.J.Jensen, S.L.King, S.Lenzi, D.Napoli, S.W.Odegard, C.M.Petrache, H.Ryde, U.J.van Severen, G.Sletten, P.O.Tjom, C.Ur

Triaxial Superdeformation in ¹⁶³Lu

NUCLEAR REACTIONS ¹³⁹La(²⁹Si, 5n), E=145 MeV; measured Eγ, Iγ, γγ-coin. ¹⁶³Lu deduced high-spin levels, J, π, superdeformed band J, π, linking transitions, possible triaxial deformation. Euroball array. Cranked mean-field calculations, potential energy surfaces.

doi: 10.1016/S0375-9474(99)00392-9
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1999SC13      J.Phys.(London) G25, 807 (1999)

C.Schuck, E.Gueorguieva, F.S.Stephens, M.A.Deleplanque, F.Hannachi, A.Korichi, A.Lopez-Martens, B.Kharraja, W.H.Kelly, Ch.Vieu, M.Kaci, J.S.Dionisio, I.Deloncle, B.J.P.Gall, U.J.van Severen, W.Pohler, B.Schulze, H.Hubel, R.Wadsworth

Pseudo-Spin Symmetry and Identical SD Bands: The excited superdeformed bands in ¹⁹¹Au

NUCLEAR STRUCTURE ¹⁹¹Au; analyzed superdeformed bands alignments; deduced possible pseudo-spin doublet. ¹⁹⁰Pt; calculated quasiparticle Routhians. Cranked mean-field calculations.

doi: 10.1088/0954-3899/25/4/042
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1999TO08      Phys.Lett. 454B, 8 (1999)

S.Tormanen, S.W.Odegard, G.B.Hagemann, A.Harsmann, M.Bergstrom, R.A.Bark, B.Herskind, G.Sletten, P.O.Tjom, A.Gorgen, H.Hubel, B.Aengenvoort, U.J.van Severen, C.Fahlander, D.Napoli, S.Lenzi, C.Petrache, C.Ur, H.J.Jensen, H.Ryde, R.Bengtsson, A.Bracco, S.Frattini, R.Chapman, D.M.Cullen, S.L.King

Triaxial Superdeformed Bands in ¹⁶⁴Lu and Enhanced E1 Decay-Out Strength

NUCLEAR REACTIONS ¹³⁹La(²⁹Si, 4n), E=145 MeV; measured Eγ, Iγ, γγ-coin. ¹⁶⁴Lu deduced high-spin levels, J, π, configurations, triaxial deformation. Euroball array. Cranked mean-field calculations.

doi: 10.1016/S0370-2693(99)00346-9
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1998AE01      Eur.Phys.J. A 1, 359 (1998)

B.Aengenvoort, W.Korten, H.Hubel, S.Chmel, A.Gorgen, U.J.van Severen, W.Pohler, R.Zinken, T.Hartlein, C.Ender, F.Kock, P.Reiter, D.Schwalm, F.Schindler, J.Gerl, R.Schubart, F.Azaiez, S.Bouneau, J.Duprat, I.Deloncle

Conversion-Electron Gamma-Ray Coincidence Spectroscopy of Superdeformed ¹³⁵Nd

NUCLEAR REACTIONS ¹²⁴Te(¹⁶O, 5n), E=111 MeV; measured Eγ, Iγ, E(ce), I(ce), γγ-, (ce)γ-coin. ¹³⁵Nd deduced high-spin, superdeformed levels, J, π, linking transitions, no E0 transitions. Mini-orange spectrometers.

doi: 10.1007/s100500050070
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1998CL06      Phys.Lett. 440B, 251 (1998)

R.M.Clark, R.Krucken, S.J.Asztalos, J.A.Becker, B.Busse, S.Chmel, M.A.Deleplanque, R.M.Diamond, P.Fallon, D.Jenkins, K.Hauschild, I.M.Hibbert, H.Hubel, I.Y.Lee, A.O.Macchiavelli, R.W.MacLeod, G.Schmid, F.S.Stephens, U.J.van Severen, K.Vetter, R.Wadsworth, S.Wan

The Shears Mechanism in the Lead Isotopes

NUCLEAR REACTIONS ^172,174,176Yb(²⁶Mg, xn), E=135, 137, 139 MeV; measured Eγ, Iγ, γγ-coin, DSA. ^{193,194,195,196,197}Pb deduced rotational bands transitions T_1/2, B(M1), shears mechanism. Magnetic rotation, tilted axis cranking.

doi: 10.1016/S0370-2693(98)01179-4
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1998TO28      Nuovo Cim. 111A, 685 (1998)

S.Tormanen, G.B.Hagemann, A.Harsmann, M.Bergstrom, R.A.Bark, B.Herskind, G.Sletten, S.W.Odegard, P.O.Tjom, A.Gorgen, H.Hubel, B.Aengenvoort, U.J.van Severen, H.Ryde, C.Fahlander, D.Napoli, S.Lenzi, C.Petrache, C.Ur, H.J.Jensen, A.Bracco, S.Frattini, R.Chapman, D.M.Cullen, S.L.King

High-Spin Studies of ¹⁶⁴Lu using EUROBALL

NUCLEAR REACTIONS ¹³⁹La(²⁹Si, 4n), E=145 MeV; measured Eγ, Iγ, γγ-coin. ¹⁶⁴Lu deduced high-spin levels, J, π, deformation. Cranking model analysis. Euroball array.

1998VA18      Phys.Lett. 434B, 14 (1998)

U.J.van Severen, R.M.Clark, R.Krucken, H.Hubel, S.J.Asztalos, J.A.Becker, B.C.Busse, M.A.Deleplanque, R.M.Diamond, P.Fallon, K.Hauschild, I.M.Hibbert, I.Y.Lee, A.O.Macchiavelli, R.W.MacLeod, G.Schmid, F.S.Stephens, K.Vetter, R.Wadsworth, S.Wan

Comparative Quadrupole Moments of Superdeformed Bands in ^193-196Pb

NUCLEAR REACTIONS ^172,174,176Yb(²⁶Mg, xn)¹⁹²Pb/¹⁹³Pb/¹⁹⁴Pb/¹⁹⁵Pb/¹⁹⁶Pb/¹⁹⁷Pb, E=135-139 MeV; measured Eγ, Iγ, γγ-coin, DSA. ^{193,194,195,196}Pb deduced superdeformed bands T_1/2, quadrupole moments, configurations.

doi: 10.1016/S0370-2693(98)00819-3
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1997AZ05      Acta Phys.Hung.N.S. 6, 289 (1997)

F.Azaiez, S.Bouneau, J.Duprat, I.Deloncle, M.-G.Porquet, U.J.van Severen, T.Nakatsukasa, M.M.Aleonard, A.Astier, G.Baldsiefen, C.W.Beausang, F.A.Beck, C.Bourgeois, D.Curien, N.Dozie, L.Ducroux, B.Gall, H.Hubel, M.Kaci, W.Korten, M.Meyer, N.Redon, H.Sergolle, J.F.Sharpey-Schafer

Octupole Vibrations of the Superdeformed ¹⁹⁶Pb Nucleus

NUCLEAR REACTIONS ¹⁸⁶W(¹⁶O, 6n), E=110 MeV; measured Eγ, Iγ, γγ-coin. ¹⁹⁶Pb deduced superdeformed bands, possible octupole vibrations.

1997BO28      Z.Phys. A358, 179 (1997)

S.Bouneau, F.Azaiez, J.Duprat, I.Deloncle, M.-G.Porquet, U.J.van Severen, T.Nakatsukasa, M.-M.Aleonard, A.Astier, G.Baldsiefen, C.W.Beausang, F.A.Beck, C.Bourgeois, D.Curien, N.Dozie, L.Ducroux, B.J.P.Gall, H.Hubel, M.Kaci, W.Korten, M.Meyer, N.Redon, H.Sergolle, J.F.Sharpey-Schafer

New Results on the Superdeformed ¹⁹⁶Pb Nucleus: Decay of the excited bands to the yrast band

NUCLEAR REACTIONS ¹⁸⁶W(¹⁶O, 6n), E=110 MeV; measured Eγ, Iγ, γγγ-coin. ¹⁹⁶Pb deduced superdeformed bands, dynamical moments of inertia. RPA model comparisons.

doi: 10.1007/s002180050299
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1997HI07      Z.Phys. A358, 199 (1997)

I.M.Hibbert, R.Wadsworth, K.Hauschild, H.Hubel, W.Korten, U.J.van Severen, E.S.Paul, A.N.Wilson, J.N.Wilson, A.P.Byrne, W.Satula, R.Wyss

Superdeformed Bands and ' Shears ' Bands in ¹⁹⁷Pb and ¹⁹⁸Pb

NUCLEAR REACTIONS ¹⁸⁶W(¹⁸O, 6n), (¹⁸O, 7n), E=110, 115 MeV; measured Eγ, Iγ, γγ-coin. ^197,198Pb deduced high-spin levels, J, π, superdeformed bands, transitions γ-multipolarity related features. Lipkin-Nogami calculations.

doi: 10.1007/s002180050307
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1997KA34      Phys.Rev. C56, R600 (1997)

M.Kaci, E.Gueorguieva, M.G.Porquet, F.Azaiez, I.Deloncle, S.Bouneau, J.Duprat, M.M.Aleonard, A.Astier, G.Baldsiefen, C.W.Beausang, F.A.Beck, Ch.Bourgeois, D.Curien, N.Dozie, L.Ducroux, B.J.P.Gall, W.Korten, M.Meyer, N.Redon, D.Prevost, H.Sergolle, J.Sharpey-Schafer, U.J.van Severen

First Indication of Population of Superdeformed States by Incomplete Fusion Reactions

NUCLEAR REACTIONS, ICPND ¹⁸⁶W(¹⁶O, X)¹⁹⁵Pb/¹⁹⁶Pb/¹⁹⁷Pb/¹⁹⁶Tl/¹⁹⁷Tl/¹⁹³Hg/¹⁹⁴Hg/¹⁹⁰Pt/¹⁸⁶Os/¹⁸⁸Os, E=110 MeV; measured residual production yield, Eγ, Iγ, γγ-coin; deduced recoil v/c, evidence for incomplete fusion process. ¹⁹⁴Hg deduced superdeformed band. EUROGAM II.

doi: 10.1103/PhysRevC.56.R600
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1997KO37      Z.Phys. A358, 217 (1997)

W.Korten, B.Schulze, H.Hubel, S.Chmel, A.Gorgen, U.J.van Severen, W.Pohler, R.Zinken, T.Hartlein, C.Ender, F.Kock, P.Reiter, D.Schwalm, F.Schindler, J.Gerl, R.Schubart, F.Azaiez, S.Bouneau, J.Duprat, I.Deloncle

Conversion-Electron Spectroscopy in the Decay of Superdeformed ¹³⁵Nd

NUCLEAR REACTIONS ¹²⁴Te(¹⁶O, 5n), E=111 MeV; measured Eγ, Iγ, γγ-, (ce)γ-coin. ¹³⁵Nd deduced high-spin, superdeformed band linking transitions ICC, γ-multipolarity, no evidence for E0 transitions. Mini-orange filter detectors.

doi: 10.1007/s002180050312
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1997SC22      Phys.Rev. C56, R1667 (1997)

C.Schuck, E.Gueorguieva, A.Lopez-Martens, F.Hannachi, A.Korichi, Ch.Vieu, J.S.Dionisio, I.Deloncle, M.Kaci, F.S.Stephens, M.A.Deleplanque, W.H.Kelly, B.Kharraja, B.J.P.Gall, U.J.van Severen, W.Pohler, B.Schulze, H.Hubel, R.Wadsworth

Proton Superdeformed Bands below the Z = 80 Gap in ¹⁹¹Au: Possible evidence for pseudospin coupling

NUCLEAR REACTIONS ¹⁸⁶W(¹¹B, 6n), E=84, 86 MeV; measured Eγ, Iγ, γγ-coin. ¹⁹¹Au deduced high-spin levels, J, π, superdeformed bands properties, configurations. Psuedospin coupling scheme interpretation.

doi: 10.1103/PhysRevC.56.R1667
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1996BA53      Z.Phys. A355, 337 (1996)

G.Baldsiefen, H.Hubel, W.Korten, U.J.van Severen, J.A.Cizewski, N.H.Medina, D.R.Napoli, C.Rossi Alvarez, G.Lo Bianco, S.Signorelli

Crossing of Shears Bands in ¹⁹⁶Pb

NUCLEAR REACTIONS ¹⁷⁰Er(³⁰Si, 4n), E=143 MeV; measured γγ-coin. ¹⁹⁶Pb deduced high-spin levels, J, π, band structure.

doi: 10.1007/s002180050117
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1996HI13      Phys.Rev. C54, 2253 (1996)

I.M.Hibbert, R.Wadsworth, K.Hauschild, H.Hubel, W.Korten, U.J.van Severen, E.S.Paul, A.N.Wilson, J.N.Wilson, A.P.Byrne, W.Satula, R.Wyss

Superdeformed Structures in ^197,198Pb

NUCLEAR REACTIONS ¹⁸⁶W(¹⁸O, xn), E=110, 115 MeV; measured Eγ, Iγ, γγ-coin. ^197,198Pb deduced superdeformed bands, dynamic moment of inertia. Enriched targets, high purity Ge detectors, BGO suppression shields. Total Routhian surface, cranking Woods-Saxon calculations.

doi: 10.1103/PhysRevC.54.2253
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1996LO07      Acta Phys.Pol. B27, 205 (1996)

A.Lopez-Martens, E.Gueorguieva, C.Schuck, F.Hannachi, Ch.Vieu, J.S.Dionisio, M.Kaci, I.Deloncle, M.G.Porquet, A.Korichi, J.Duprat, S.Bouneau, F.Azaiez, W.H.Kelly, B.J.P.Gall, B.Kharraja, U.J.van Severen, W.Pohler, B.Schulze, H.Hubel, M.A.Deleplanque, R.Wadsworth

Supeprdeformed Proton Orbitals Below the Z = 80 Gap: ¹⁹¹Au

NUCLEAR REACTIONS ¹⁸⁶W(¹¹B, 6n), E=84, 86 MeV; measured γγ-coin. ¹⁹¹Au deduced levels, J, π, superdeformed bands, dynamical moment of inertia.

1995BA35      Nucl.Phys. A587, 562 (1995)

G.Baldsiefen, S.Chmel, H.Hubel, W.Korten, M.Neffgen, W.Pohler, U.J.van Severen, J.Heese, H.Kluge, K.H.Maier, K.Spohr

Shears Bands and Their Links to Spherical States in ¹⁹⁷Pb

NUCLEAR REACTIONS ¹⁸⁶W(¹⁶O, 5n), E=97 MeV; measured γγ-coin, Eγ, γγ(θ), DCO ratios. ¹⁹⁷Pb deduced levels, shears bands, J, π. Compton-suppressed Ge detectors, BGO detectors. Titled-axis cranking calculations.

doi: 10.1016/0375-9474(95)00025-V
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1995KO15      Z.Phys. A351, 143 (1995)

W.Korten, P.Brocking, H.Hubel, W.Pohler, U.J.van Severen, P.Willsau, T.Hartlein, C.Ender, P.Reiter, D.Schwalm, J.Gerl, T.Happ, T.Kroll, M.Kaspar, I.Peter, S.Schremmer, K.Vetter

Lifetime of the Two-Phonon Vibrational State in ²³²Th

NUCLEAR REACTIONS ²³²Th(⁹⁰Zr, ⁹⁰Zr'), E=410 MeV; measured Eγ, Iγ following Coulomb excitation, Doppler-shift recoil distance. ²³²Th deduced high-spin levels T_1/2, B(λ).

doi: 10.1007/BF01289524
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1995KO38      Phys.Scr. T56, 44 (1995)

W.Korten, G.Baldsiefen, M.Neffgen, H.Hubel, S.Chmel, W.Pohler, U.J.van Severen, P.Willsau, S.Frauendorf, J.Meng, H.Grawe, J.Heese, H.Kluge, K.H.Maier, R.Schubart, K.Spohr

' Shears Bands ' in Pb Nuclei - a New Nuclear Structure Effect

NUCLEAR STRUCTURE ¹⁹⁹Pb; calculated levels, B(M1). Tilted-axis cranking model.

doi: 10.1088/0031-8949/1995/T56/007
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1995NE09      Nucl.Phys. A595, 499 (1995)

M.Neffgen, G.Baldsiefen, S.Frauendorf, H.Grawe, J.Heese, H.Hubel, H.Kluge, A.Korichi, W.Korten, K.H.Maier, D.Mehta, J.Meng, N.Nenoff, M.Piiparinen, M.Schonhofer, R.Schubart, U.J.van Severen, N.Singh, G.Sletten, B.V.T.Rao, P.Willsau

Lifetimes of Shears Bands in ¹⁹⁹Pb

NUCLEAR REACTIONS ¹⁸⁶W(¹⁸O, 5n), E=92, 94 MeV; measured γγ-coin, DSA, Doppler shifts. ¹⁹⁹Pb levels deduced T_1/2, B(λ). Compton-suppressed Ge detectors. Tilted-axis cranking calculations.

doi: 10.1016/0375-9474(95)00375-4
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1995VA32      Z.Phys. A353, 15 (1995)

U.J.van Severen, W.Korten, H.Hubel, D.Bazzacco, G.LoBianco, N.H.Medina, C.Rossi Alvarez, S.Signorelli, K.Strahle, P.Willsau

A Pair of Excited Superdeformed Bands in ¹⁹⁶Pb

NUCLEAR REACTIONS ¹⁷⁰Er(³⁰Si, 4n), E=143 MeV; measured γγ-coin. ¹⁹⁶Pb deduced levels, J, π, excited superdeformed bands.

doi: 10.1007/BF01297721
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