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NSR database version of April 26, 2024.

Search: Author = J.M.Nieminen

Found 18 matches.

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2000DJ01      Phys.Rev. C61, 024607 (2000)

B.Djerroud, B.Schaly, S.Flibotte, G.C.Ball, S.Courtin, M.Cromaz, D.S.Haslip, T.Lampman, A.O.Macchiavelli, J.M.Nieminen, C.E.Svensson, J.C.Waddington, D.Ward, J.N.Wilson

Fission Barriers, Coupled-Channel, and Shell Effects at the Coulomb Barrier in the A ∼ 190 Mass Region

NUCLEAR REACTIONS ¹⁴²Nd(⁴⁸Ca, 2n), E=185 MeV; ¹¹⁰Pd(⁸⁰Se, 2n), E=304 MeV; measured γ-ray fold; deduced role of shell effects, coupled channels, fission barrier features. Statistical model calculations.

doi: 10.1103/PhysRevC.61.024607
Citations: PlumX Metrics

1999SV01      Phys.Rev.Lett. 82, 3400 (1999)

C.E.Svensson, D.Rudolph, C.Baktash, M.A.Bentley, J.A.Cameron, M.P.Carpenter, M.Devlin, J.Eberth, S.Flibotte, A.Galindo-Uribarri, G.Hackman, D.S.Haslip, R.V.F.Janssens, D.R.LaFosse, T.J.Lampman, I.Y.Lee, F.Lerma, A.O.Macchiavelli, J.M.Nieminen, S.D.Paul, D.C.Radford, P.Reiter, L.L.Riedinger, D.G.Sarantites, B.Schaly, D.Seweryniak, O.Thelen, H.G.Thomas, J.C.Waddington, D.Ward, W.Weintraub, J.N.Wilson, C.H.Yu, A.V.Afanasjev, I.Ragnarsson

Decay Out of the Doubly Magic Superdeformed Band in the N = Z Nucleus ⁶⁰Zn

NUCLEAR REACTIONS ⁴⁰Ca(²⁸Si, 2α), E=125 MeV; ⁴⁰Ca(³²S, 3α), E=134 MeV; measured Eγ, Iγ, γγ-, (charged particle)γ-coin. ⁶⁰Zn deduced high-spin levels, J, π, superdeformed band quadrupole moment, linking transitions, B(E2). Gammasphere, Microball arrays.

doi: 10.1103/PhysRevLett.82.3400
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1998HA02      Phys.Rev. C57, 442 (1998)

D.S.Haslip, S.Flibotte, G.de France, M.Devlin, A.Galindo-Uribarri, G.Gervais, D.R.LaFosse, I.Y.Lee, F.Lerma, A.O.Macchiavelli, R.W.MacLeod, S.M.Mullins, J.M.Nieminen, D.G.Sarantites, C.E.Svensson, J.C.Waddington, J.N.Wilson

Superdeformation in ¹⁴⁵Sm

NUCLEAR REACTIONS ¹²⁴Sn(²⁹Si, 4nα), E=158 MeV; measured Eγ, Iγ, γγ-, (charged particle)γ-coin. ¹⁴⁵Sm deduced high-spin levels, superdeformed bands, configurations. Cranked shell-model analysis.

doi: 10.1103/PhysRevC.57.442
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1998HA21      Phys.Rev. C57, 2196 (1998)

D.S.Haslip, N.Kintz, S.Flibotte, R.A.E.Austin, G.de France, M.Devlin, Ch.Finck, A.Galindo-Uribarri, G.Gervais, D.R.LaFosse, T.J.Lampman, I.Y.Lee, F.Lerma, A.O.Macchiavelli, R.W.MacLeod, S.M.Mullins, J.M.Nieminen, T.Rodinger, D.G.Sarantites, O.Stezowski, C.E.Svensson, J.P.Vivien, J.C.Waddington, D.Ward, N.Wilson

Superdeformation in ^147,148Eu: Identical bands and π6¹-π6³ Crossings

NUCLEAR REACTIONS ¹²⁴Sn(²⁹Si, 4np), E=158 MeV; ¹³⁰Te(²³Na, 6n), E=145 MeV; measured Eγ, Iγ, (charged particle)γ-, γγ-coin. ^147,148Eu deduced high-spin levels, superdeformed bands, configurations, band crossing.

doi: 10.1103/PhysRevC.57.2196
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1998HA53      Phys.Rev. C58, R2649 (1998)

D.S.Haslip, S.Flibotte, R.A.E.Austin, G.de France, M.Devlin, Ch.Finck, A.Galindo-Uribarri, G.Gervais, N.Kintz, D.R.LaFosse, T.J.Lampman, F.Lerma, S.M.Mullins, J.M.Nieminen, T.Rodinger, D.G.Sarantites, O.Stezowski, C.E.Svensson, J.P.Vivien, J.C.Waddington, J.N.Wilson

Systematic Survey of ΔI = 4 Bifurcation in A ∼ 150 Superdeformed Nuclei

NUCLEAR STRUCTURE ^147,148Eu, ^{147,148,150,151}Gd; analyzed superdeformed bands transition energies; deduced ΔI=4 staggering statistical significance.

doi: 10.1103/PhysRevC.58.R2649
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1998NI06      Phys.Rev. C58, R1 (1998)

J.M.Nieminen, S.Flibotte, G.Gervais, D.S.Haslip, I.Y.Lee, A.O.Macchiavelli, R.W.MacLeod, O.Stezowski, C.E.Svensson, J.C.Waddington, J.N.Wilson

Population of Superdeformed Bands at Extreme Angular Momenta

NUCLEAR REACTIONS ⁷⁶Ge(⁷⁶Ge, 5n), E=323 MeV; ¹²⁴Sn(²⁸Si, 5n), E=152 MeV; measured Eγ, Iγ, γγ-coin. ¹⁴⁷Gd deduced superdeformed band intensity, population enhancement in symmetric reaction.

doi: 10.1103/PhysRevC.58.R1
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1998SV01      Phys.Rev.Lett. 80, 2558 (1998)

C.E.Svensson, C.Baktash, G.C.Ball, J.A.Cameron, M.Devlin, J.Eberth, S.Flibotte, A.Galindo-Uribarri, D.S.Haslip, V.P.Janzen, D.R.LaFosse, I.Y.Lee, A.O.Macchiavelli, R.W.MacLeod, J.M.Nieminen, S.D.Paul, D.C.Radford, L.L.Riedinger, D.Rudolph, D.G.Sarantites, H.G.Thomas, J.C.Waddington, D.Ward, W.Weintraub, J.N.Wilson, A.V.Afanasjev, I.Ragnarsson

Smooth Termination of Rotational Bands in ⁶²Zn: Evidence for a loss of collectivity

NUCLEAR REACTIONS ⁴⁰Ca(²⁸Si, 2pα), E=115 MeV; measured Eγ, Iγ, γγ-, (charged particle)γ-coin, fractional Doppler shift. ⁶²Zn deduced high-spin levels, J, π, transition quadrupole moments, configurations, rotational band termination. Cranked shell-model calculations.

doi: 10.1103/PhysRevLett.80.2558
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1998WI13      Phys.Rev. C57, R2090 (1998)

J.N.Wilson, R.A.E.Austin, G.C.Ball, J.DeGraaf, M.Cromaz, S.Flibotte, A.Galindo-Uribarri, G.Gervais, D.S.Haslip, V.P.Janzen, S.M.Mullins, J.M.Nieminen, D.C.Radford, C.E.Svensson, D.Ward, J.C.Waddington

Properties of Superdeformed Band Population in the A ≈ 130 Region

NUCLEAR REACTIONS ¹⁰⁰Mo(³⁶S, 4n), (³⁶S, 5n), E=135-170 MeV; measured Eγ, Iγ, γγ-, (charged-particle)γ-coin. ^131,132Ce deduced superdeformed bands feeding properties vs entrance channel spin, energy.

doi: 10.1103/PhysRevC.57.R2090
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1997FL03      J.Phys.(London) G23, 1183 (1997)

S.Flibotte, J.M.Nieminen

Superdeformation: A tool to study fusion reactions

NUCLEAR REACTIONS ¹¹⁶Sn(³⁰Si, X), ⁷⁰Ge(⁷⁶Ge, X), E not given; analyzed GDR spectra vs γ multiplicity; ⁶⁴Ni(⁷⁴Ge, X), E=239 MeV; ¹¹²Cd(²⁶Mg, X), E=94 MeV; analyzed compound-nucleus spin distribution; ⁶⁴Ni(⁷⁴Ge, 2n), (⁷⁴Ge, 4n), E=239 MeV; analyzed relative σ. ^134,135,136Nd deduced superdeformed band feeding enhancement related features.

doi: 10.1088/0954-3899/23/10/005
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1997GE07      Nucl.Phys. A624, 257 (1997)

G.Gervais, D.C.Radford, Y.R.Shimizu, M.Cromaz, J.DeGraaf, T.E.Drake, S.Flibotte, A.Galindo-Uribarri, D.S.Haslip, V.P.Janzen, M.Matsuzaki, S.M.Mullins, J.M.Nieminen, C.E.Svensson, J.C.Waddington, D.Ward, J.N.Wilson

Collective γ-Vibrational Bands in ¹⁶⁵Ho and ¹⁶⁷Er

NUCLEAR REACTIONS ¹⁶⁵Ho, ¹⁶⁷Er(²⁰⁹Bi, ²⁰⁹Bi'), E=5.4 MeV/nucleon; measured Eγ, Iγ, γγ-coin following Coulomb excitation. ¹⁶⁵Ho, ¹⁶⁷Er deduced high-spin levels, J, π, K, γ-vibrational bands, signature splitting energies, intrinsic moment ratios, identical bands. Compton-suppressed hyperpure Ge detector array, 4π BGO ball. Cranked shell model plus RPA plus particle-vibration coupling calculations.

doi: 10.1016/S0375-9474(97)00320-5
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1997HA19      Phys.Rev.Lett. 78, 3447 (1997)

D.S.Haslip, S.Flibotte, G.de France, M.Devlin, A.Galindo-Uribarri, G.Gervais, G.Hackman, D.R.LaFosse, I.Y.Lee, F.Lerma, A.O.Macchiavelli, R.W.MacLeod, S.M.Mullins, J.M.Nieminen, D.G.Sarantites, C.E.Svensson, J.C.Waddington, J.N.Wilson

ΔI = 4 Bifurcation in Identical Superdeformed Bands

NUCLEAR REACTIONS ¹²⁴Sn(²⁹Si, 4np), (²⁹Si, 5n), E=158 MeV; measured γγγ-coin. ¹⁴⁸Gd, ¹⁴⁸Eu deduced superdeformed bands, ΔI=4 bifurcation evidence.

doi: 10.1103/PhysRevLett.78.3447
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1997NI04      Phys.Rev.Lett. 78, 3832 (1997)

J.M.Nieminen, S.Flibotte, M.Cromaz, A.Galindo-Uribarri, G.Gervais, D.S.Haslip, V.P.Janzen, D.C.Radford, C.E.Svensson, J.C.Waddington, D.Ward, J.N.Wilson

Enhancement of Superdeformed Band Population in ¹³⁵Nd

NUCLEAR REACTIONS ⁶⁴Ni(⁷⁴Ge, X), ¹¹²Cd(²⁶Mg, X), E not given; measured γγ-coin; deduced ^134,135,136Nd, ¹³²Ce production relative σ. ¹³⁵Nd deduced superdeformed band population enhancement entrance channel dependence.

doi: 10.1103/PhysRevLett.78.3832
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1997SV02      Phys.Rev.Lett. 79, 1233 (1997)

C.E.Svensson, C.Baktash, J.A.Cameron, M.Devlin, J.Eberth, S.Flibotte, D.S.Haslip, D.R.LaFosse, I.Y.Lee, A.O.Macchiavelli, R.W.MacLeod, J.M.Nieminen, S.D.Paul, L.L.Riedinger, D.Rudolph, D.G.Sarantites, H.G.Thomas, J.C.Waddington, W.Weintraub, J.N.Wilson, A.V.Afanasjev, I.Ragnarsson

Observation and Quadrupole-Moment Measurement of the First Superdeformed Band in the A ∼ 60 Mass Region

NUCLEAR REACTIONS ⁴⁰Ca(²⁸Si, 2pα), E=125 MeV; measured γγ-coin. ⁶²Zn deduced high-spin levels, J, π, band structure, quadrupole moment, deformation, superdeformation features.

doi: 10.1103/PhysRevLett.79.1233
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1997SV04      Nucl.Instrum.Methods Phys.Res. A396, 228 (1997); Erratum Nucl.Instrum.Methods Phys.Res. A403, 57 (1998)

C.E.Svensson, J.A.Cameron, S.Flibotte, G.Gervais, D.S.Haslip, J.M.Nieminen, J.C.Waddington, J.N.Wilson, G.C.Ball, A.Galindo-Uribarri, V.P.Janzen, D.C.Radford, D.Ward, M.Cromaz, T.E.Drake

Channel Selection for High Spin γ-Ray Spectroscopy Studies Via Total Energy Measurements in Fusion-Evaporation Reactions

NUCLEAR REACTIONS ⁴⁰Ca(²⁴Mg, 2p), (²⁴Mg, 3p), (²⁴Mg, 4p), E=80 MeV; measured Eγ, Iγ, pγ-coin, total E; deduced channel selectivity related features.

doi: 10.1016/S0168-9002(97)00708-0
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1997WI02      Phys.Rev. C55, 519 (1997)

J.N.Wilson, G.C.Ball, M.Cromaz, T.E.Drake, S.Flibotte, A.Galindo-Uribarri, J.deGraff, G.Hackman, S.M.Mullins, J.M.Nieminen, V.P.Janzen, D.C.Radford, J.C.Waddington, D.Ward

Superdeformed Band in ¹³⁰Ce

NUCLEAR REACTIONS ¹⁰⁰Mo(³⁴S, 4n), E=145 MeV; measured γγ-coin. ¹³⁰Ce deduced superdeformed band, valence neutron configuration.

doi: 10.1103/PhysRevC.55.519
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1997WI19      Phys.Rev. C56, 2502 (1997)

J.N.Wilson, S.J.Asztalos, R.A.Austin, B.Busse, R.M.Clark, M.A.Deleplanque, R.M.Diamond, P.Fallon, S.Flibotte, G.Gervais, D.S.Haslip, I.Y.Lee, R.Kruecken, A.O.Macchiavelli, R.W.MacLeod, J.M.Nieminen, G.J.Schmid, F.S.Stephens, O.Stezowski, C.E.Svensson, K.Vetter, J.C.Waddington

Search for Hyperdeformation in ¹⁶⁸Yb

NUCLEAR REACTIONS ¹²⁴Sn(⁴⁸Ca, xnypzα)¹⁶⁵Yb/¹⁶⁶Yb/¹⁶⁷Yb/¹⁶⁸Yb/¹⁶⁹Yb/¹⁶⁷Tm/¹⁶³Er/¹⁶⁴Er, E=215 MeV; measured Eγ, Iγ, γγ-coin, relative yields. ¹⁶⁸Yb deduced no evidence for hyperdeformed states. Monte Carlo simulation, observational sensitivity determined.

doi: 10.1103/PhysRevC.56.2502
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1996FL02      Phys.Rev.Lett. 77, 1448 (1996)

S.Flibotte, Ph.Chomaz, M.Colonna, M.Cromaz, J.DeGraaf, T.E.Drake, A.Galindo-Uribarri, V.P.Janzen, J.Jonkman, S.W.Marshall, S.M.Mullins, J.M.Nieminen, D.C.Radford, J.L.Rodriguez, J.C.Waddington, D.Ward, J.N.Wilson

Pre-Equilibrium Effects in the Population of Giant Dipole Resonances

NUCLEAR REACTIONS ¹⁰⁴Pd(³⁶S, X), E=160 MeV; ¹⁰⁰Mo(⁴⁰Ca, X), E=170 MeV; measured high-energy γ-spectra; deduced preequilibrium effects in GDR population.

doi: 10.1103/PhysRevLett.77.1448
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1996NI10      Phys.Rev. C54, 2764 (1996)

J.M.Nieminen, S.Flibotte, A.Galindo-Uribarri, G.Viesti, G.C.Ball, D.Bazzacco, M.Cromaz, G.de Angelis, J.DeGraaf, M.De Poli, T.E.Drake, D.Fabris, Ch.Finck, V.P.Janzen, S.Lunardi, M.Lunardon, N.H.Medina, G.Maron, C.M.Petrache, D.C.Radford, C.Rossi Alvarez, O.Stezowski, Ch.Theisen, J.C.Waddington, D.Ward, J.N.Wilson

Superdeformed Band in ¹⁴⁷Tb

NUCLEAR REACTIONS ¹⁰⁰Mo(⁵¹V, 4n), E=230 MeV; measured γγγ-coin. ¹⁴⁷Tb deduced superdeformed band, configuration. Total Routhian surface, single-particle Routhian calculations.

doi: 10.1103/PhysRevC.54.2764
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