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NSR database version of April 27, 2024.

Search: Author = V.Koponen

Found 9 matches.

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1989HO13      Nucl.Phys. A496, 462 (1989)

J.Honkanen, V.Koponen, P.Taskinen, J.Aysto, K.Eskola, S.Messelt, K.Ogawa

Beta Strength to Excited States in the Decays of f_7/2 Mirror Nuclides

RADIOACTIVITY ⁴⁹Mn(β⁺) [from ⁵⁰Cr(p, 2n)]; ⁵¹Fe(β⁺) [from ⁵⁰Cr(³He, 2n)]; ⁵³Co(β⁺) [from ⁵⁴Fe(p, 2n)]; measured Eγ, Iγ, T_1/2; deduced log ft. ⁴⁹Cr, ⁵¹Mn, ⁵³Fe deduced levels, J, π, Gamow-Teller matrix elements, B(λ). Ge, Si(Au), plastic detectors, He jet, on-line mass separation. Shell-model calculations.

doi: 10.1016/0375-9474(89)90071-7
Citations: PlumX Metrics

1989KO22      Z.Phys. A333, 339 (1989)

V.Koponen, J.Aysto, J.Honkanen, P.Jauho, H.Penttila, J.Suhonen, P.Taskinen, K.Rykaczewski, J.Zylicz, C.N.Davids

Gamow-Teller Decay of ¹¹⁸Pd and of Neighbouring Even Isotopes of Palladium

RADIOACTIVITY ^114,116,118Pd(β^-) [from ²³⁸U(p, F), E=20 MeV]; measured Eγ, Iγ, γγ-, γ(X-ray)-coin. ¹¹⁸Pd deduced T_1/2, Qβ. ^114,116,118Ag deduced levels, J, π, γ-multipolarity, ICC, Gamow-Teller transitions.

1988PE13      Phys.Rev. C38, 931 (1988)

H.Penttila, P.Taskinen, P.Jauho, V.Koponen, C.N.Davids, J.Aysto

Half-Life Measurements for Neutron-Rich Tc, Ru, Rh, and Pd Isotopes. Identification of the New Isotopes ¹¹¹Tc, ¹¹³Ru, and ¹¹³Rh

RADIOACTIVITY ¹¹¹Tc, ^111,112,113Ru, ¹¹³Rh, ¹¹⁸Pd; [from ²³⁸U(p, F), E=20 MeV]; measured Eγ, Xγ-, βγ-, γγ-coin, T_1/2; deduced T_1/2 systematics. Microscopic model comparisons.

doi: 10.1103/PhysRevC.38.931
Citations: PlumX Metrics

1987HO14      Nucl.Phys. A471, 489 (1987)

J.Honkanen, V.Koponen, H.Hyvonen, P.Taskinen, J.Aysto, K.Ogawa

Experimential and Shell-Model Study of the Beta Decay of ⁴³Ti

RADIOACTIVITY ⁴³Ti(β⁺) [from ⁴⁰Ca(α, n), He-jet, on-line mass separation]; measured E(γ), I(γ), E(β), T_1/2; deduced log ft. ⁴³Sc deduced levels, J, π, Gamow-Teller matrix elements, transition strengths. Ge, Si(Au), plastic detectors. Shell-model calculations.

doi: 10.1016/0375-9474(87)90095-9
Citations: PlumX Metrics

1986AR12      Nucl.Instrum.Methods Phys.Res. A247, 431 (1986)

J.Arje, J.Aysto, H.Hyvonen, P.Taskinen, V.Koponen, J.Honkanen, K.Valli, A.Hautojarvi, K.Vierinen

The Ion Guide Isotope Separator On-Line, IGISOL

RADIOACTIVITY ^207mBi [from Pb(p, xn), E=20 MeV]; measured T_1/2. On-line separation.

NUCLEAR REACTIONS ¹¹B(d, p), E=6 MeV; ^106,110Cd, ⁵⁴Fe, ⁵⁸Ni, ⁶⁴Zn(p, n), E=16 MeV; ⁸⁸Sr(p, n)⁸⁸Y/^88mY, E=16 MeV; ⁹⁰Zr(p, n)⁹⁰Nb/^90mNb, E=16 MeV; ⁹²Mo, ²⁷Al, ⁴⁶Ti, ⁵⁰Cr(p, n), E=15.4 MeV; ¹⁰⁸Cd(p, n), E=14 MeV; ¹⁸¹Ta, ²⁰⁴Pb(p, 2n), Hg(p, xn)²⁰¹Tl/^201mTl/²⁰²Tl/^202mTl/Pb(p, xn)²⁰⁶Bi/^206mBi/²⁰⁷Pb/^207mPb/²⁰⁷Bi/^207mBi/²⁰⁸Bi/^208mBi, E=20 MeV; ²⁷Al(p, dn), E=16 MeV; ⁵⁰Cr(p, np), E=20 MeV; ²⁴Mg, ⁴⁶Ti, ⁵⁰Cr, ⁵⁴Fe(³He, 2n), E=27 MeV; ⁴⁰Ca(³He, α), (³He, nα), (³He, d), (³He, n), E=15 MeV; ²⁷Al(α, n), E=20 MeV; ⁴⁰Ca(α, p)⁴³Sc/^43mSc, E=20 MeV; measured residual yields. Activation technique.

doi: 10.1016/0168-9002(86)90404-3
Citations: PlumX Metrics

1986LO13      Phys.Scr. 34, 669 (1986)

T.Lonnroth, J.Hattula, V.Koponen, E.K.Warburton

Medium-Spin Structure of the N = 28 Isotones ⁵⁴Fe and ⁵⁵Co

NUCLEAR REACTIONS ⁵⁴Fe(³He, ³He'), (³He, d), (³He, n2p), (³He, pn), (³He, pd), E=27 MeV; measured Eγ, Iγ, γ(θ), γγ-coin. ⁵⁴Fe, ⁵⁵Co deduced levels, J, π, shapes, deformation parameters. Enriched target, Ge detector.

NUCLEAR STRUCTURE ⁵⁸Ni; calculated proton, neutron levels. Hartree-Fock calculations.

1985AR01      Phys.Rev.Lett. 54, 99 (1985)

J.Arje, J.Aysto, H.Hyvonen, P.Taskinen, V.Koponen, J.Honkanen, A.Hautojarvi, K.Vierinen

Submillisecond On-Line Mass Separation of Nonvolatile Radioactive Elements: An application of charge exchange and thermalization processes of primary recoil ions in helium

NUCLEAR REACTIONS ¹¹B(d, p), E=5 MeV; measured residual production yield. ⁹⁰Zr(p, n), ¹⁸¹Ta(p, 2n), ⁴⁰Ca(α, p), E=20 MeV; Pb(p, X)²⁰⁷Bi/^207mBi, E=20 MeV; measured residual isomer production yield. Helium flow recoil ion transportation, activation technique.

doi: 10.1103/PhysRevLett.54.99
Citations: PlumX Metrics

1984AY01      Phys.Lett. 138B, 369 (1984)

J.Aysto, J.Arje, V.Koponen, P.Taskinen, H.Hyvonen, A.Hautojarvi, K.Vierinen

Beta Decay of T(z) = -1/2 Nuclides ⁵¹Fe and ⁵⁵Ni: A new approach to on-line isotope separation

RADIOACTIVITY ⁵¹Fe, ⁵⁵Ni(β⁺) [from ⁵⁰Cr, ⁵⁴Fe(³He, 2n), E=27 MeV]; measured Eγ, Iγ, Eβ, Iβ, T_1/2; deduced Qβ, log ft, Gamow-Teller matrix elements. ⁵¹Mn level deduced Iβ, allowed decay. Shell model comparison.

doi: 10.1016/0370-2693(84)91919-1
Citations: PlumX Metrics

1984LO16      Z.Phys. A319, 149 (1984)

T.Lonnroth, J.Aysto, J.Arje, J.Honkanen, V.Koponen, P.Taskinen, H.Hyvonen

Half-Life and Configuration of the (1/2)⁺ Intruder State in ²⁰³Bi

NUCLEAR REACTIONS ²⁰⁴Pb(p, 2n), E=20 MeV; measured Eγ, Iγ, γ(t). ²⁰³Bi deduced isomer T_1/2, decay characteristics, configuration, depopulating branch levels T_1/2. Shell model.