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Search: Author = M.Jaaskelainen

Found 21 matches.

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1989JU02      Nucl.Phys. A504, 205 (1989)

S.Juutinen, J.Hattula, M.Jaaskelainen, A.Virtanen, T.Lonnroth

Excited Structure of the 56Ni-Plus-Three-Nucleon Isobars 59Ni and 59Cu

NUCLEAR REACTIONS 58Ni(3He, 2pγ), (3He, npγ), E=15-27 MeV; measured Eγ, Iγ(E), Iγ(θ), γγ-coin, I(ce). 59Ni, 59Cu deduced levels, J, π, ICC, relative, absolute B(λ), band structures. Ge, Ge(Li) detectors, enriched target.

doi: 10.1016/0375-9474(89)90343-6
Citations: PlumX Metrics


1987HA03      J.Phys.(London) G13, 57 (1987)

J.Hattula, S.Juutinen, M.Jaaskelainen, T.Lonnroth, A.Pakkanen, M.Piiparinen, G.Sletten

Neutron and Proton Bands in 122Xe at High Spins

NUCLEAR REACTIONS 110Pd(16O, 4n), (16O, 3n), (18O, 4n), 109Ag(18O, 4n), E=65-82 MeV; measured Eγ, Iγ, γγ-coin. 122Te(3He, 3n), E=27 MeV; measured σ(θ). 122Xe deduced levels, band structure, ICC, Iγ. 123,124Xe, 123Cs deduced levels, J, π, yrast sequence, quasiparticle band alignments.

doi: 10.1088/0305-4616/13/1/009
Citations: PlumX Metrics


1987MO21      Nucl.Phys. A472, 295 (1987)

J.N.Mo, S.Sergiwa, R.Chapman, J.C.Lisle, E.Paul, J.C.Willmott, J.Hattula, M.Jaaskelainen, J.Simpson, P.M.Walker, J.D.Garrett, G.B.Hagemann, B.Herskind, M.A.Riley, G.Sletten

High-Spin, Discrete Line Spectroscopy of 162Yb and 164Hf and the Systematics of N = 29 Isotones

NUCLEAR REACTIONS 122Sn(44Ca, 4n), E=195 MeV; 120Sn(48Ti, 4n), E=225 MeV; measured γγ-coin, γγ(θ), γ(θ), linear polarization. 162Yb, 164Hf deduced levels, J, π. Systematic comparisons of N=92 isotones. Enriched targets.

doi: 10.1016/0375-9474(87)90212-0
Citations: PlumX Metrics


1986SO10      Phys.Rev. C34, 917 (1986)

L.G.Sobotka, D.G.Sarantites, H.Puchta, F.A.Dilmanian, M.Jaaskelainen, M.L.Halbert, J.H.Barker, J.R.Beene, R.L.Ferguson, D.C.Hensley, G.R.Young

Particle-Bound Excited State Yields Produced in the Reaction of 181 MeV 19F + 159Tb

NUCLEAR REACTIONS 159Tb(19F, X), E=181 MeV; measured (particle)γ-coin for X=10Be, 11,12B, 12,13,14C, 14,15,17N, 16,17,18O; deduced particle-bound ejectile yields. 10Be, 11,12B, 12,13,14C, 14,15,17N, 16,17,18O deduced excited state population.

doi: 10.1103/PhysRevC.34.917
Citations: PlumX Metrics


1985PE12      Phys.Rev. C32, 1572 (1985)

G.A.Petitt, A.Gavron, J.R.Beene, B.Cheynis, R.L.Ferguson, F.E.Obenshain, F.Plasil, G.R.Young, M.Jaaskelainen, D.G.Sarantites, C.F.Maguire

Neutron Emission in Inelastic Reactions of 12C + 158Gd and 20Ne + 150Nd

NUCLEAR REACTIONS 158Gd(12C, nX), E=192 MeV; 150Nd(20Ne, nX), E=176, 239 MeV; measured σ(En), σ(fragment θ, θn); deduced neutron emission mechanism differences.

doi: 10.1103/PhysRevC.32.1572
Citations: PlumX Metrics


1983GA01      Phys.Rev. C27, 450 (1983)

A.Gavron, J.R.Beene, B.Cheynis, R.L.Ferguson, F.E.Obenshain, F.Plasil, G.R.Young, G.A.Petitt, C.F.Maguire, D.G.Sarantites, M.Jaaskelainen, K.Geoffroy-Young

Systematics of Nonequilibrium Neutron Emission

NUCLEAR REACTIONS 158Gd(12C, xn), E=192 MeV; 150Nd(20Ne, xn), E=176, 239 MeV; measured neutron spectra; deduced nonequilibrium emission systematics. Moving hot source, Boltzmann master equation models.

doi: 10.1103/PhysRevC.27.450
Citations: PlumX Metrics


1983GA16      Phys.Scr. T5, 178 (1983)

J.J.Gaardhoje, J.D.Garrett, G.B.Hagemann, B.Herskind, A.Holm, P.Nolan, G.Sletten, J.R.Beene, M.L.Halbert, D.C.Hensley, I.Y.Lee, F.Plasil, F.A.Dilmanian, M.Jaaskelainen, H.Puchta, D.G.Sarantites, R.Woodward, Th.Lindblad

High Spin Phenomena in the Mass 100-200 Region Seen through the Crystal Ball

NUCLEAR REACTIONS 112,114Cd, 96Zr, 135Ba, 124Sn(50Ti, X), E=230 MeV; measured entry region γ-spectra average properties; deduced γ-ray fold distribution mass dependence. 166,164,162,160,156Yb deduced γ-ray fold distribution neutron dependence. Spin spectrometer.

doi: 10.1088/0031-8949/1983/T5/034
Citations: PlumX Metrics


1983HA28      Phys.Scr. T5, 91 (1983)

M.L.Halbert, J.H.Barker, J.R.Beene, R.L.Ferguson, D.C.Hensley, G.R.Young, F.A.Dilmanian, M.Jaaskelainen, H.Puchta, D.G.Sarantites, R.Woodward

Heavy-Ion Reaction Mechanisms Studied with the Spin Spectrometer

NUCLEAR REACTIONS 146Nd(20Ne, 5n), (20Ne, 6n), (20Ne, 7n), (20Ne, 8n), E=136 MeV; measured γ-multiplicity, σ vs multiplicity, excitation. 159Tb(19F, X), E=180 MeV; measured γ-multiplicity vs fragment mass, Z, σ(fragment θ) for X=C, B, Be, N, O, Ne. Comparison with sum rule predictions.

doi: 10.1088/0031-8949/1983/T5/014
Citations: PlumX Metrics


1983JA04      Nucl.Phys. A396, 319c (1983)

M.Jaaskelainen, D.G.Sarantites, F.A.Dilmanian, R.Woodward, H.Puchta, J.R.Beene, J.Hattula, M.L.Halbert, D.C.Hensley, J.H.Barker

Evolution of Nuclear Shapes in 157-161Yb as a Function of Spin and Neutron Number

NUCLEAR REACTIONS 146Nd(20Ne, 6n), (20Ne, 7n), E=136, 149 MeV; 146Nd(20Ne, 8n), 144Nd(20Ne, 6n), (20Ne, 7n), E=149 MeV; 146Nd(20Ne, 5n), E=136 MeV; measured continuum Eγ, Iγ, γ(θ) vs multiplicity. 157,158,159,160,161Yb deduced nuclear shapes.

doi: 10.1016/0375-9474(83)90028-3
Citations: PlumX Metrics


1983JA12      Phys.Scr. T5, 175 (1983)

M.Jaaskelainen, D.G.Sarantites, F.A.Dilmanian, R.Woodward, H.Puchta, J.R.Beene, J.Hattula, M.L.Halbert, D.C.Hensley

Transition from Prolate to Oblate to Triaxial Shapes in 158Yb

NUCLEAR REACTIONS 144Nd(20Ne, 6n), 146Nd(20Ne, 8n), E=149 MeV; measured γ-multiplicity, γ(θ) vs multiplicity. 158Yb deduced average excitation energy, continuum decay characteristics, prolate to oblate shape change.


1983SA10      Nucl.Phys. A400, 435c (1983)

R.C.Sarantites, M.Jaaskelainen, F.A.Dilmanian, H.Puchta, R.Woodward, J.R.Beene, D.C.Hensley, M.L.Halbert, J.Hattula, J.H.Barker, R.Novotny, L.Adler, R.K.Choudhury, M.N.Namboodiri, R.P.Schmitt, J.B.Natowitz

Research Highlights with the Spin Spectrometer

NUCLEAR REACTIONS 146Nd(20Ne, 8n), E=136 MeV; 146Nd(20Ne, 6n), (20Ne, 7n), E=136, 149 MeV; 144Nd(20Ne, 6n), (20Ne, 7n), 146Nd(20Ne, 8n), E=149 MeV; measured continuum γ-spectra, γ-multiplicities; deduced fusion reaction, entry state energy, angular momentum dependences. 160,158,159Yb deduced effective moment of inertia vs spin, entry line energy vs γ-multiplicity, localized stretched dipole transition. 157,161Yb deduced localized stretched dipole transition.

doi: 10.1016/0375-9474(83)90448-7
Citations: PlumX Metrics


1982DI16      Phys.Rev.Lett. 49, 1909 (1982)

F.A.Dilmanian, D.G.Sarantites, M.Jaaskelainen, H.Puchta, R.Woodward, J.R.Beene, D.C.Hensley, M.L.Halbert, R.Novotny, L.Adler, R.K.Choudhury, M.N.Namboodiri, R.P.Schmitt, J.B.Natowitz

Alpha-Particle Angular Distributions with Respect to Spin Direction

NUCLEAR REACTIONS 150Nd(20Ne, xα), E=176 MeV; measured σ(θ, Eα) vs γ-multiplicity, evaporation residue spin direction; deduced α-emitting nucleus deformation characteristics.

doi: 10.1103/PhysRevLett.49.1909
Citations: PlumX Metrics


1982JA08      Phys.Rev.Lett. 49, 1387 (1982)

M.Jaaskelainen, D.G.Sarantites, R.Woodward, F.A.Dilmanian, H.Puchta, J.R.Beene, J.Hattula, M.L.Halbert, D.C.Hensley, J.H.Barker

Evidence for a Prolate to Oblate Shape Change at High Spin in 160Yb

NUCLEAR REACTIONS 146Nd(20Ne, 6n), E=136, 149 MeV; measured γ-multiplicity. 160Yb deduced entry state population, decay properties, shape change. Spin spectrometer.

doi: 10.1103/PhysRevLett.49.1387
Citations: PlumX Metrics


1982JA10      Phys.Lett. 119B, 65 (1982)

M.Jaaskelainen, D.G.Sarantites, F.A.Dilmanian, R.Woodward, H.Puchta, J.R.Beene, J.Hattula, M.L.Halbert, D.C.Hensley

Evolution of the Decay Modes of 158Yb with Spin

NUCLEAR REACTIONS 144Nd(20Ne, 6n), 146Nd(20Ne, 8n), E=149 MeV; measured continuum Eγ, Iγ, γ-anisotropies. 158Yb deduced entry state decay, collectivity spin dependence, stretched dipole component.

doi: 10.1016/0370-2693(82)90244-1
Citations: PlumX Metrics


1982SA21      Phys.Lett. 115B, 441 (1982)

D.G.Sarantites, M.Jaaskelainen, R.Woodward, F.A.Dilmanian, D.C.Hensley, J.H.Barker, J.R.Beene, M.L.Halbert, W.T.Milner

Population of the Entry States in Heavy-Ion Fusion Reactions

NUCLEAR REACTIONS 146Nd(20Ne, 5n), (20Ne, 6n), (20Ne, 7n), E=136 MeV; measured σ vs γ-multiplicity, entry state distributions; deduced entrance channel fusion (L). Statistical model.

doi: 10.1016/0370-2693(82)90388-4
Citations: PlumX Metrics


1981DO05      J.Phys.(London) G7, 1379 (1981)

F.Donau, J.Hattula, H.Helppi, A.Luukko, M.Jaaskelainen

How to Describe Low-Lying Bands in Odd-A Transitional Xenon Nuclei

NUCLEAR STRUCTURE 123,125,127,129Xe; calculated levels, band structure. Core-quasiparticle model.

doi: 10.1088/0305-4616/7/10/015
Citations: PlumX Metrics


1981GA23      Phys.Rev.Lett. 47, 1255 (1981)

A.Gavron, J.R.Beene, B.Cheynis, R.L.Ferguson, F.E.Obenshain, F.Plasil, G.R.Young, G.A.Petitt, M.Jaaskelainen, D.G.Sarantites, C.F.Maguire

Time Scale of Fission at High Angular Momentum

NUCLEAR REACTIONS, Fission 158Gd(12C, nX), (12C, nF), E=192 MeV; 150Nd(20Ne, nX), (20Ne, nF), E=176, 239 MeV; measured σ(fragment θ, θn, En), σ(evaporation residue θ, θn, En); deduced neutron multiplicity, fragment temperature, fission time scale. Evaporation model.

doi: 10.1103/PhysRevLett.47.1255
Citations: PlumX Metrics


1981GA29      Phys.Rev. C24, 2048 (1981)

A.Gavron, J.R.Beene, R.L.Ferguson, F.E.Obenshain, F.Plasil, G.R.Young, G.A.Petitt, K.G.Young, M.Jaaskelainen, D.G.Sarantites, C.F.Maguire

Neutron Emission in 12C + 158Gd and 13C + 158Gd Reactions between 8 and 12 MeV/Nucleon

NUCLEAR REACTIONS 158Gd(12C, X), 157Gd(13C, X), E=8-12 MeV/nucleon; measured n(fragment)-coin, En, neutron multiplicities; deduced nonequilibrium component.

doi: 10.1103/PhysRevC.24.2048
Citations: PlumX Metrics


1981GO04      Nucl.Phys. A357, 109 (1981)

L.Goettig, Ch.Droste, A.Dygo, T.Morek, J.Srebrny, R.Broda, J.Styczen, J.Hattula, H.Helppi, M.Jaaskelainen

In-Beam Study of the 128,130Xe Nuclei

NUCLEAR REACTIONS 126,128Te(α, 2nγ), E=25.5-27 MeV; 128,130Te(3He, 3nγ), E=20-27 MeV; measured Eγ, Iγ(θ), I(ce), γγ(t), αγ(t), 3Heγ(t), σ(Eγ). 128,130Xe deduced levels, J, π, T1/2, γ-multipolarity, δ, ICC.

doi: 10.1016/0375-9474(81)90628-X
Citations: PlumX Metrics


1981HE04      Nucl.Phys. A357, 333 (1981)

H.Helppi, J.Hattula, A.Luukko, M.Jaaskelainen, F.Donau

In-Beam Study of 127,129Xe and Collective Description of the Level Structures in Odd-A Xe Nuclei

NUCLEAR REACTIONS 126Te(3He, 2n), 128,130Te(3He, 4n), E=20-27 MeV; 126Te(α, n), E=18 MeV; measured Eγ, Iγ(θ), γγ-coin, γ(t), I(ce). 127,129Xe deduced levels, J, π, T1/2, ICC, δ(E2/M1). Enriched targets.

NUCLEAR STRUCTURE 123,125,127,129Xe; calculated levels, band structure. Triaxial rotor, core plus quasiparticle model calculations.

doi: 10.1016/0375-9474(81)90225-6
Citations: PlumX Metrics


1980BA20      Phys.Rev.Lett. 45, 424 (1980)

J.H.Barker, J.R.Beene, M.L.Halbert, D.C.Hensley, M.Jaaskelainen, D.G.Sarantites, R.Woodward

Direct Evidence for a Narrow Window at High Angular Momentum in Incomplete-Fusion Reactions

NUCLEAR REACTIONS 146Nd(16O, xnα), E=142 MeV; measured αγ-coin, side feeding; deduced narrow window at high angular momentum, no central collisions. Generalized incomplete fusion model.

doi: 10.1103/PhysRevLett.45.424
Citations: PlumX Metrics


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