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Search: Author = M.Jaaskelainen

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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. ^{166,164,162,160,156}Yb 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. ^{157,158,159,160,161}Yb 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 ^{123,125,127,129}Xe; 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, T_1/2, 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, T_1/2, ICC, δ(E2/M1). Enriched targets.

NUCLEAR STRUCTURE ^{123,125,127,129}Xe; 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