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NSR database version of April 26, 2024.

Search: Author = T.Ramsoy

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1996TV01      Phys.Rev.Lett. 76, 1035 (1996)

T.S.Tveter, J.J.Gaardhoje, A.Maj, T.Ramsoy, A.Atac, J.Bacelar, A.Bracco, A.Buda, F.Camera, B.Herskind, W.Korten, W.Krolas, A.Menthe, B.Million, H.Nifenecker, M.Pignanelli, J.A.Pinston, H.van der Ploeg, F.Schussler, G.Sletten

Collective Dipole Motion in Highly Excited ²⁷²Hs (Z = 108) Nuclei

NUCLEAR REACTIONS ²³²Th(⁴⁰Ar, xn), E=10.5, 15 MeV/nucleon; measured γ(fragment)-coin, γ-anisotropy, evaporation residue neutron decay times. ²⁷²Hs deduced GDR decay characteristics.

doi: 10.1103/PhysRevLett.76.1035
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1996TV02      Nucl.Phys. A599, 123c (1996)

T.S.Tveter, J.J.Gaardhoje, A.Maj, T.Ramsoy, A.Atac, J.Bacelar, A.Bracco, A.Buda, F.Camera, B.Herskind, W.Korten, W.Krolas, A.Menthe, B.Million, H.Nifenecker, M.Pignanelli, J.A.Pinston, H.van der Ploeg, F.Schussler, G.Sletten

Collective Motion in Hot Superheavy Nuclei

NUCLEAR REACTIONS ²³²Th(⁴⁰Ar, xn), E=10.5, 15 MeV/nucleons; measured γ spectra, anisotropies, (fragment)γ-coin. ²⁷²Hs deduced GDR strength characteristics.

doi: 10.1016/0375-9474(96)00054-1
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1995BR11      Phys.Rev.Lett. 74, 3748 (1995)

A.Bracco, F.Camera, M.Mattiuzzi, B.Million, M.Pignanelli, J.J.Gaardhoje, A.Maj, T.Ramsoy, T.Tveter, Z.Zelazny

Increase in Width of the Giant Dipole Resonance in Hot Nuclei: Shape change or collisional damping ( Question )

NUCLEAR REACTIONS ^62,61Ni(⁴⁸Ti, X), E=223, 203 MeV; measured γ(θ), strength function. ^109,110Sn deduced GDR, Γ.

doi: 10.1103/PhysRevLett.74.3748
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1995BR19      Acta Phys.Pol. B26, 407 (1995)

A.Bracco, F.Camera, M.Mattiuzzi, B.Million, M.Pignanelli, J.J.Gaardhoje, T.Ramsoy, T.Tveter, Z.Zelazny, A.Maj

The Damping of the GDR at Finite Temperature: Recent progress

NUCLEAR REACTIONS ⁷⁰Zn(³⁶Ar, X), E=27 MeV/nucleon; ^62,61Ni(⁴⁸Ti, X), E=203, 223 MeV; ¹⁴⁸Nd(²⁸Si, X), E=147 MeV; compiled, reviewed γ-spectra data; deduced GDR damping, other characteristic vs T for mass 110, 170. Hot rotating nuclei.

1995MA54      Acta Phys.Pol. B26, 417 (1995)

A.Maj, T.S.Tveter, J.J.Gaardhoje, B.Herskind, G.Sletten, T.Ramsoy, A.Atac, W.Korten, A.Bracco, F.Camera, M.Mattiuzzi, B.Million, M.Pignanelli, J.Bacelar, A.Buda, H.van der Ploeg, W.Krolas, H.Nifenecker, F.Schussler, J.A.Pinston, A.Menthe, P.Paul, D.J.Hofman, I.Dioszegi, S.Schadmand

Hot Superheavy Nuclei Seen with the GDR γ-Decay

NUCLEAR REACTIONS ²³²Th(⁴⁰Ar, F), E=6.8-15 MeV/nucleon; ²³²Th(³⁷Cl, F), E=7.3 MeV/nucleon; measured fission (fragment)γ-coin. ²⁷²Hs, ²⁶⁹Bh deduced GDR γ-decay features. Other reaction data, aspects reviewed.

1995MA84      Phys.Lett. 364B, 13 (1995)

M.Mattiuzzi, A.Bracco, F.Camera, B.Million, M.Pignanelli, J.J.Gaardhoje, A.Maj, T.Ramsoy, T.Tveter, Z.Zelazny

Thermal Fluctuation and Collisional Damping Effects in the GDR Observables in Hot Rotating ¹⁷⁶W Nuclei

NUCLEAR REACTIONS ¹⁴⁸Nd(²⁸Si, X), E=147 MeV; measured γγ-coin, Eγ, Iγ. ¹⁷⁶W deduced GDR width, thermal fluctuation, collisional damping effects role.

doi: 10.1016/0370-2693(95)01230-5
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1994CA11      Nucl.Phys. A572, 401 (1994)

F.Camera, A.Bracco, B.Million, M.Pignanelli, J.J.Gaardhoje, Z.Zelazny, T.Ramsoy, A.Maj

Large Effects of Orientation Fluctuations in the Angular Distribution of the GDR Photons

NUCLEAR REACTIONS ¹⁴⁸Nd(¹⁷O, xnpα), E=70 MeV; ¹⁴⁸Nd(¹⁸O, xnpα), E=78 MeV; ¹⁵⁰Nd(¹⁷O, xnpα), E=85 MeV; ¹⁵⁸Gd(¹⁷O, xnpα), E=74 MeV; ¹⁶⁰Gd(¹⁶O, xnpα), E=85 MeV; ⁹⁴Mo(¹⁶O, xnpα), E=85 MeV; measured σ(Eγ, θ), Iγ(θ). ^165,166,167Er, ^175,176Hf, ¹¹⁰Sn deduced GDR features, shape, orientation fluctuations role, effective nuclear deformation. Hot nuclei.

doi: 10.1016/0375-9474(94)90182-1
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1994ZE01      Nucl.Phys. A569, 1c (1994)

Z.Zelazny, J.J.Gaardhoje, A.Maj, T.S.Tveter, T.Ramsoy, W.Korten, A.Bracco, F.Camera, M.Matiuzzi, B.Million, M.Pignanelli

Some Open Problems in Hot GDR Spectroscopy

NUCLEAR REACTIONS ¹¹⁴Cd(⁴⁸Ti, X), E=225 MeV; analyzed γ-spectra fold distribution, Iγ data; deduced shape degrees of freedom equilibration features. Other data reviewed.

doi: 10.1016/0375-9474(94)90091-4
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1993KO08      Z.Phys. A344, 475 (1993)

W.Korten, M.J.Piiparinen, A.Atac, R.A.Bark, B.Herskind, T.Ramsoy, G.Sletten, J.Gerl, H.Hubel, P.Willsau, B.Cederwall, L.O.Norlin, B.Fant

On the Decay of the Superdeformed Band in ¹⁹⁴Pb

NUCLEAR REACTIONS ¹⁶⁴Dy(³⁴S, 4n), E=160 MeV; measured γγ-coin. ¹⁹⁴Pb deduced levels, J, π, superdeformed band decay features.

1993PI01      Phys.Rev.Lett. 70, 150 (1993)

M.Piiparinen, P.Kleinheinz, J.Blomqvist, A.Virtanen, A.Atac, D.Muller, J.Nyberg, T.Ramsoy, G.Sletten

Two- to One -Phonon E3 Transition Strength in ¹⁴⁸Gd

NUCLEAR REACTIONS ¹³³Cs(¹⁹F, 4n), E=73.5 MeV; measured Eγ, Iγ, decay time. ¹⁴⁸Gd deduced levels, J, π, mean T_1/2, B(λ), configuration.

doi: 10.1103/PhysRevLett.70.150
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1991GU04      Nucl.Phys. A531, 370 (1991)

M.Guttormsen, A.Atac, K.Klungland, S.Messelt, T.Ramsoy, J.Rekstad, T.S.Tveter, Z.Zelazny

Gross Properties of Statistical γ-Decay in ¹⁷²Yb

NUCLEAR REACTIONS ¹⁷³Yb(³He, α), E=45 MeV; measured σ(Eα), Eγ, Iγ, αγ-coin. ¹⁷²Yb deduced γ-ray multiplicity, statistical γ-decay features. Enriched target, Ge, NaI, Si detectors.

doi: 10.1016/0375-9474(91)90617-F
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1990GU14      Phys.Scr. T32, 54 (1990)

M.Guttormsen, A.Atac, G.Lovhoiden, S.Messelt, T.Ramsoy, J.Rekstad, T.F.Thorsteinsen, T.S.Tveter, Z.Zelazny

Statistical Gamma-Decay at Low Angular Momentum

NUCLEAR REACTIONS ¹⁷⁰Yb, ¹⁶²Dy(³He, ³He'), ¹⁷³Yb, ¹⁶²Dy(³He, α), E=45 MeV; measured γ(ejectile)-coin; deduced γ-emission mechanism.

doi: 10.1088/0031-8949/1990/T32/010
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1989ZE01      Nucl.Phys. A499, 100 (1989)

Z.Zelazny, T.S.Tveter, A.Atac, M.Guttormsen, T.Ramsoy, J.Rekstad

First-Generation γ-Rays from Highly-Excited Even Rare-Earth Nuclei

NUCLEAR REACTIONS ^161,163Dy, ^171,173Yb(³He, α), E=45 MeV; measured σ(Eα, Eγ), γ(θ), Eγ, Iγ, αγ-coin. ^160,162Dy, ^170,172Yb deduced first generation γ-ray transitions, branching ratios. Enriched targets, Ge, NaI, Si counters. Fermi-gas model analysis.

doi: 10.1016/0375-9474(89)90271-6
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1988BA32      Phys.Scr. 37, 843 (1988)

T.Batsch, J.Kownacki, Z.Zelazny, M.Guttormsen, T.Ramsoy, J.Rekstad

Particle-Core Multiplets in ⁸⁹Y

NUCLEAR REACTIONS ⁸⁷Rb(α, 2n), E=24-34 MeV; measured Eγ, Iγ, γγ-coin, γ(θ). ⁸⁹Y deduced levels, J, π, configuration.

doi: 10.1088/0031-8949/37/6/001
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1987AT01      Nucl.Phys. A472, 269 (1987)

A.Atac, J.Rekstad, M.Guttormsen, S.Messelt, T.Ramsoy, T.F.Thorsteinsen, G.Lovhoiden, T.Rodland

The Decay of Hot Dysprosium Nuclei

NUCLEAR REACTIONS ^162,163Dy(³He, xnα), E=45 MeV; measured σ(Eα), Eγ, Iγ, αγ-coin. ^{162,161,160,159,158}Dy deduced γ-multiplicity, neutron energy, α-spectra. Enriched targets, Ge, NaI, Si detectors. Fermi-gas model analysis.

doi: 10.1016/0375-9474(87)90210-7
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1987GU08      Nucl.Instrum.Methods Phys.Res. A255, 518 (1987)

M.Guttormsen, T.Ramsoy, J.Rekstad

The First Generation of γ-Rays from Hot Nuclei

NUCLEAR REACTIONS ¹⁷¹Yb, ¹⁶³Dy(³He, α), E=45 MeV; measured Eγ, Iγ; deduced excitation energy independence of unfolding technique.

doi: 10.1016/0168-9002(87)91221-6
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1987RA16      Nucl.Phys. A470, 79 (1987)

T.Ramsoy, A.Atac, T.Engeland, M.Guttormsen, J.Rekstad, G.Lovhoiden, T.F.Thorsteinsen, J.S.Vaagen

Particle-Vibration Coupled States in ¹⁶¹Dy

NUCLEAR REACTIONS ¹⁶¹Dy(³He, ³He'), E=32 MeV; measured σ(E), Eγ, Iγ, ³Heγ-coin. ¹⁶¹Dy deduced levels, J, π. Particle-core model calculations. Ge, Si counters, enriched target.

doi: 10.1016/0375-9474(87)90121-7
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1987RE09      Nucl.Phys. A470, 397 (1987)

J.Rekstad, A.Atac, M.Guttormsen, T.Ramsoy, J.B.Olsen, F.Ingebretsen, T.F.Thorsteinsen, G.Lovhoiden, T.Rodland

Reaction Dependence and Cross Structure of the γ-Decay of Highly Excited States in the Rare Earth Nucleus ¹⁶²Dy

NUCLEAR REACTIONS ¹⁶³Dy(³He, α), ¹⁶²Dy(³He, ³He'), E=45 MeV; measured γ(particle)-coin. ¹⁶²Dy deduced yrast-transition characsteristics.

doi: 10.1016/0375-9474(87)90009-1
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1986GU03      Phys.Scr. 33, 385 (1986)

M.Guttormsen, A.Atac, F.Ingebretsen, S.Messelt, J.B.Olsen, T.Ramsoy, J.Rekstad, L.A.Ronning, G.Lovhoiden, T.Rodland, T.F.Thorsteinsen

Statistical γ-Decay in s-d Shell Nuclei

NUCLEAR REACTIONS ²⁷Al(³He, α), (³He, ³He'), (³He, t), E=45 MeV; measured σ(Eα), σ(E(³He')), σ(Et), γ(particle)-coin. ^26,27Al, ²⁷Si deduced γ-multiplicity. Fermi gas model.

doi: 10.1088/0031-8949/33/5/001
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1986RE18      Phys.Scr. 34, 644 (1986)

J.Rekstad, M.Guttormsen, A.Atac, F.Ingebretsen, S.Messelt, T.Ramsoy, T.F.Thorsteinsen, G.Lovhoiden, T.Rodland

Structure and Decay Properties of Low-Spin States at High Excitation Energy

NUCLEAR REACTIONS ^161,163Dy(d, t), E=15 MeV; measured σ(Et), Eγ, Iγ, γγ-coin. ^160,162Dy deduced levels, decay characteristics. Other data input, ΔE-E telescopes, Ge, NaI detectors.

doi: 10.1088/0031-8949/34/6A/020
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1985RA07      Nucl.Phys. A438, 301 (1985)

T.Ramsoy, J.Rekstad, M.Guttormsen, A.Henriquez, F.Ingebretsen, T.Rodland, T.F.Thorsteinsen, G.Lovhoiden

γ-Decay from Two-Quasiparticle States Populated in the ^161,163Dy(d, t) Reactions

NUCLEAR REACTIONS ^161,163Dy(d, t), E=15 MeV; measured σ(E(t)), Eγ, Iγ, γ(t). ^160,162Dy deduced levels, J, π, γ-multiplicity. Enriched targets.

doi: 10.1016/0375-9474(85)90377-X
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1984RA03      Nucl.Phys. A414, 269 (1984)

T.Ramsoy, J.Rekstad, A.Henriquez, F.Ingebretsen, M.Guttormsen, E.Hammaren, T.F.Thorsteinsen

Deep-Lying νh_11/2 Hole States in ¹⁴⁵Nd

NUCLEAR REACTIONS ¹⁴⁶Nd(³He, α), E=26 MeV; measured σ(Eγ, θ), Eγ, Iγ, γα-coin. ¹⁴⁵Nd deduced levels, γ-ray multiplicity, level density, spectroscopic strength. Enriched target, Ge(Li), NaI(Tl), Si detectors. Fermi gas model analysis.

doi: 10.1016/0375-9474(84)90644-4
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1983HE19      Phys.Lett. 130B, 171 (1983)

A.Henriquez, J.Rekstad, F.Ingebretsen, M.Guttormsen, K.Eldhuset, B.Nordmoen, T.Ramsoy, R.Renstrom-Pedersen, R.M.Aasen

The Decay from the Two-Quasiparticle Regime in Even-Even Deformed Rare Earth Nuclei

NUCLEAR REACTIONS ¹⁷¹Yb, ¹⁶¹Dy(³He, α), E=26 MeV; measured Eγ, Iγ, αγ-coin, αγ(θ). ¹⁷⁰Yb, ¹⁶⁰Dy deduced ground state band transition, dipole character, initial, final state configurations. Two-quasiparticle scheme.

doi: 10.1016/0370-2693(83)91035-3
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