Nuclear Science References (NSR)

NUCLEAR REACTIONS ¹⁸²W(³²S, X), (³²S, ³²S), E=166-260 MeV; ¹⁶⁶Er(⁴⁸Ti, X), (⁴⁸Ti, ⁴⁸Ti), E=220-298 MeV; ¹⁵⁴Sm(⁶⁰Ni, X), (⁶⁰Ni, ⁶⁰Ni), E=269-421 MeV; measured σ(θ), deep-inelastic, fission like σ(θ) vs fragment mass; deduced complete fusion contribution to fission like σ, entrance channel dependence.

doi: 10.1103/PhysRevC.53.1734
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1996NI02 Nucl.Phys. A598, 418 (1996)

T.Nilsson, F.Humbert, W.Schwab, H.Simon, M.H.Smedberg, M.Zinser, Th.Blaich, M.J.G.Borge, L.V.Chulkov, Th.W.Elze, H.Emling, H.Geissel, K.Grimm, D.Guillemaud-Mueller, P.G.Hansen, R.Holzmann, H.Irnich, B.Jonson, J.G.Keller, H.Klingler, A.A.Korsheninnikov, J.V.Kratz, R.Kulessa, D.Lambrecht, Y.Leifels, A.Magel, M.Mohar, A.C.Mueller, G.Munzenberg, F.Nickel, G.Nyman, A.Richter, K.Riisager, C.Scheidenberger, G.Schrieder, B.M.Sherrill, K.Stelzer, J.Stroth, O.Tengblad, W.Trautmann, E.Wajda, M.V.Zhukov, E.Zude

⁶He and Neutron Momentum Distributions from ⁸He in Nuclear Break-Up Reactions at 240 MeV/u

NUCLEAR REACTIONS C(⁸He, X), E=240 MeV/nucleon; measured ⁶He, n-momentum distributions, invariant mass spectra; deduced two-neutron removal σ, reaction mechanism. Secondary ⁸He beam from ⁹Be(¹⁸O, X) reactions.

doi: 10.1016/0375-9474(95)00468-8
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1995HU06 Phys.Lett. 347B, 198 (1995)

F.Humbert, T.Nilsson, W.Schwab, M.Zinser, Th.Blaich, M.J.G.Borge, L.V.Chulkov, Th.W.Elze, H.Emling, B.Franzke, H.Freiesleben, H.Geissel, K.Grimm, D.Guillemaud-Mueller, P.G.Hansen, R.Holzmann, H.Irnich, L.Johannsen, B.Jonson, J.G.Keller, O.Klepper, H.Klingler, J.V.Kratz, R.Kulessa, D.Lambrecht, Y.Leifels, A.Magel, M.Mohar, A.C.Mueller, G.Munzenberg, P.Moller, F.Nickel, G.Nyman, A.Richter, K.Riisager, C.Scheidenberger, G.Schrieder, B.M.Sherrill, H.Simon, K.Stelzer, J.Stroth, O.Tengblad, W.Trautmann, E.Wajda, E.Zude

Longitudinal and Transverse Momentum Distributions of ⁹Li Fragments from Break-Up of ¹¹Li

NUCLEAR REACTIONS C, ²⁷Al, Pb(¹¹Li, X), E=280 MeV/nucleon; measured ⁹Li transverse longitudinal momentum distributions following ¹¹Li breakup, two-neutron removal σ.

doi: 10.1016/0370-2693(95)00072-S
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1995NI04 Nucl.Phys. A583, 795c (1995)

T.Nilsson, F.Humbert, W.Schwab, M.Zinser, Th.Blaich, M.J.G.Borge, L.V.Chulkov, H.Eickhoff, Th.W.Elze, H.Emling, B.Franzke, H.Freiesleben, H.Geissel, K.Grimm, D.Guillemaud-Mueller, P.G.Hansen, R.Holzmann, H.Irnich, L.Johannsen, B.Jonson, J.G.Keller, O.Klepper, H.Klingler, J.V.Kratz, R.Kulessa, D.Lambrecht, Y.Leifels, A.Magel, M.Mohar, E.F.Moore, A.C.Mueller, G.Munzenberg, P.Moller, F.Nickel, G.Nyman, A.Richter, K.Riisager, C.Scheidenberger, G.Schrieder, B.M.Sherrill, H.Simon, K.Stelzer, J.Stroth, O.Tengblad, W.Trautmann, E.Wajda, E.Zude, and the S034 Collaboration

Dissociation of ⁸He into ⁶He + n + X at 240 MeV/u

NUCLEAR REACTIONS C, Pb(⁸He, X), E=240 MeV/nucleon; measured (⁶He+n) projectile breakup, product transverse momentum distribution.

doi: 10.1016/0375-9474(94)00760-K
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1995ZI03 Phys.Rev.Lett. 75, 1719 (1995)

M.Zinser, F.Humbert, T.Nilsson, W.Schwab, Th.Blaich, M.J.G.Borge, L.V.Chulkov, H.Eickhoff, Th.W.Elze, H.Emling, B.Franzke, H.Freiesleben, H.Geissel, K.Grimm, D.Guillemaud-Mueller, P.G.Hansen, R.Holzmann, H.Irnich, B.Jonson, J.G.Keller, O.Klepper, H.Klingler, J.V.Kratz, R.Kulessa, D.Lambrecht, Y.Leifels, A.Magel, M.Mohar, A.C.Mueller, G.Munzenberg, F.Nickel, G.Nyman, A.Richter, K.Riisager, C.Scheidenberger, G.Schrieder, B.M.Sherrill, H.Simon, K.Stelzer, J.Stroth, O.Tengblad, W.Trautmann, E.Wajda, E.Zude

Study of the Unstable Nucleus ¹⁰Li in Stripping Reactions of the Radioactive Projectiles ¹¹Be and ¹¹Li

NUCLEAR REACTIONS C(¹¹Li, X), E=280 MeV/nucleon; (¹¹Be, X), E=460 MeV/nucleon; measured neutron radial momentum distributions in coincidence with fragment following projectile breakup. ¹⁰Li deduced possible level. ¹¹Li deduced neutron halo related features.

doi: 10.1103/PhysRevLett.75.1719
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1994LA28 Z.Phys. A350, 115 (1994)

D.Lambrecht, T.Blaich, T.W.Elze, H.Emling, H.Freiesleben, K.Grimm, W.Henning, R.Holzmann, J.G.Keller, H.Klingler, J.V.Kratz, R.Kulessa, S.Lange, Y.Leifels, E.Lubkiewicz, E.F.Moore, W.Prokopowicz, R.Schmidt, C.Schutter, H.Spies, K.Stelzer, J.Stroth, E.Wajda, W.Walus, M.Zinser, E.Zude, and the FOPI-Collaboration

Energy Dependence of Collective Flow of Neutrons and Protons in ¹⁹⁷Au + ¹⁹⁷Au Collisions

NUCLEAR REACTIONS ¹⁹⁷Au(¹⁹⁷Au, X), E=400-800 MeV/nucleon; measured mid-rapidity azimuthal distributions for neutrons, protons; deduced collective nucleon flow energy dependence.

doi: 10.1007/BF01290679
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1993LE12 Phys.Rev.Lett. 71, 963 (1993)

Y.Leifels, Th.Blaich, Th.W.Elze, H.Emling, H.Freiesleben, K.Grimm, W.Henning, R.Holzmann, J.G.Keller, H.Klingler, J.V.Kratz, R.Kulessa, D.Lambrecht, S.Lange, E.Lubkiewicz, E.F.Moore, W.Prokopowicz, R.Schmidt, C.Schutter, H.Spies, K.Stelzer, J.Stroth, E.Wajda, W.Walus, M.Zinser, E.Zude, and the FOPI Collaboration

Exclusive Studies of Neutron and Charged Particle Emission in Collisions of ¹⁹⁷Au + ¹⁹⁷Au at 400 MeV/Nucleon

NUCLEAR REACTIONS ¹⁹⁷Au(¹⁹⁷Au, X), E=400 MeV/nucleon; measured σ(φn); deduced neutron squeezeout evidence.

doi: 10.1103/PhysRevLett.71.963
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1993QU03 Z.Phys. A346, 119 (1993)

A.B.Quint, W.Reisdorf, K.-H.Schmidt, P.Armbruster, F.P.Hessberger, S.Hofmann, J.Keller, G.Munzenberg, H.Stelzer, H.-G.Clerc, W.Morawek, C.-C.Sahm

Investigation of the Fusion of Heavy Nearly Symmetric Systems

NUCLEAR REACTIONS, ICPND ^90,92,96Zr, ^92,96,100Mo, ¹⁰⁴Ru, ¹¹⁰Pd(¹⁰⁰Mo, X), E(cm)=3-5 MeV/nucleon; ⁹⁶Zr(⁹⁶Zr, X), E(cm)=3-5 MeV/nucleon; measured evaporation residue production σ(E), Eα, Iα; deduced evidence for ¹⁹¹Po. Other reactions discussed.

RADIOACTIVITY ¹⁹¹Po(α) [from ¹⁰⁰Mo(¹⁰⁰Mo, xn), E=3-5 MeV/nucleon]; measured Eα, Iα; deduced T_1/2, Qα.

doi: 10.1007/BF01294627
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1993SC07 Phys.Rev.Lett. 70, 1767 (1993)

R.Schmidt, Th.Blaich, Th.W.Elze, H.Emling, H.Freiesleben, K.Grimm, W.Henning, R.Holzmann, J.G.Keller, H.Klingler, R.Kulessa, J.V.Kratz, D.Lambrecht, J.S.Lange, Y.Leifels, E.Lubkiewicz, E.F.Moore, E.Wajda, W.Prokopowicz, Ch.Schutter, H.Spies, K.Stelzer, J.Stroth, W.Walus, H.J.Wollersheim, M.Zinser, E.Zude

Electromagnetic Excitation of the Double Giant Dipole Resonance in ¹³⁶Xe

NUCLEAR REACTIONS Pb(¹³⁶Xe, ¹³⁶Xe'), E=700 MeV/nucleon; measured projectile neutron decay, response to electromagnetic excitation; deduced isovector GDR excitation σ for projectile. ¹³⁶Xe deduced double isovector GDR energy, width.

doi: 10.1103/PhysRevLett.70.1767
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1989MU09 Z.Phys. A333, 163 (1989)

G.Munzenberg, P.Armbruster, S.Hofmann, F.P.Hessberger, H.Folger, J.G.Keller, V.Ninov, K.Poppensieker, A.B.Quint, W.Reisdorf, K.-H.Schmidt, J.R.H.Schneider, H.-J.Schott, K.Summerer, I.Zychor, M.E.Leino, D.Ackermann, U.Gollerthan, E.Hanelt, W.Morawek, D.Vermeulen, Y.Fujita, T.Schwab

Element 107

NUCLEAR REACTIONS ²⁰⁹Bi(⁵⁴Cr, xn), E=4.87-5.07 MeV/nucleon; measured α-spectra; deduced evidence for ^261,262,262mBh, formation σ, reaction σ(E).

RADIOACTIVITY ^261,262,262mBh(α) [from ²⁰⁹Bi(⁵⁴Cr, xn), E=4.87-5.07 MeV/nucleon]; measured α-spectra, αα-correlations, T_1/2; deduced no SF-decay evidence.

1987KE04 Phys.Rev. C36, 1364 (1987)

J.G.Keller, B.B.Back, B.G.Glagola, D.Henderson, S.B.Kaufman, S.J.Sanders, R.H.Siemssen, F.Videbaek, B.D.Wilkins, A.Worsham

Distribution of Reaction Strength in ³²S + ¹⁸²W Collisions

NUCLEAR REACTIONS ¹⁸²W(³²S, ³²S), (³²S, X), E=166, 177, 222, 260 MeV; measured σ(θ); deduced reaction, deep inelastic, fission σ(E), fission product mass, reaction strength distributions.

doi: 10.1103/PhysRevC.36.1364
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1987MU15 Z.Phys. A328, 49 (1987)

G.Munzenberg, P.Armbruster, G.Berthes, H.Folger, F.P.Hessberger, S.Hofmann, J.Keller, K.Poppensieker, A.B.Quint, W.Reisdorf, K.-H.Schmidt, H.-J.Schott, K.Summerer, I.Zychor, M.E.Leino, R.Hingmann, U.Gollerthan, E.Hanelt

Observation of the Isotopes ²⁶⁴108 and ²⁶⁵108

COMPILATION ^{237,238,239,240,241,242,243,244,245,246}Pu, ^{240,241,242,243,244,245,246,247,248,249,250}Cm, ^{242,243,244,245,246,248,249,250,251,252,253,254}Cf; compiled experimental, theoretical mass differences. ^{245,246,247,248,249,250,251,252,254,255,256,257}Fm, ^{251,252,253,254,255,256,257,259}No, ²⁵⁵Rf, ²⁵⁶Rf, ²⁵⁷Rf, ²⁵⁹Rf, ²⁶¹Rf, ²⁵⁹Sg, ²⁶⁰Sg, ²⁶¹Sg, ²⁶³Sg, ²⁶⁵Hs; compiled partial α-decay T_1/2, Q(α), experimental, theoretical mass differences.

RADIOACTIVITY ²⁶⁴Hs, ²⁶⁵Hs(α) [from ^207,208Pb(⁵⁸Fe, n), E=5.04 MeV/nucleon]; measured Eα, Iα. ²⁶⁵Hs deduced α-decay T_1/2, energy. ²⁶⁴Hs deduced α-decay T_1/2.

NUCLEAR REACTIONS ^207,208Pb(⁵⁸Fe, n), E=5.04 MeV/nucleon; measured Eα, Iα; deduced evidence for ²⁶⁴Hs, ²⁶⁵Hs.

1987SA52 Phys.Rev.Lett. 59, 2856 (1987)

S.J.Sanders, D.G.Kovar, B.B.Back, C.Beck, B.K.Dichter, D.Henderson, R.V.F.Janssens, J.G.Keller, S.Kaufman, T.-F.Wang, B.Wilkins, F.Videbaek

Asymmetric Fission of ⁵⁶Ni

NUCLEAR REACTIONS, ICPND ²⁴Mg(³²S, X), E=141.8 MeV; measured mass, velocity spectra, binary reaction σ(A); deduced fission reaction yield characteristics. ⁵⁶Ni deduced fission mechanism.

doi: 10.1103/PhysRevLett.59.2856
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1986KE03 Nucl.Phys. A452, 173 (1986)

J.G.Keller, K.-H.Schmidt, F.P.Hessberger, G.Munzenberg, W.Reisdorf, H.-G.Clerc, C.-C.Sahm

Cold Fusion in Symmetric ⁹⁰Zr-Induced Reactions

RADIOACTIVITY ^{172,173,174,175,176,177}Ir, ¹⁷⁵Pt, ^178,179,180Au, ¹⁸¹Hg, ¹⁸²Tl, ^181,182,183Pb(α); measured E(α); deduced α-branching ratios.

NUCLEAR REACTIONS ⁸⁹Y, ^90,92,96Zr, ⁹⁴Mo(⁹⁰Zr, xn), E=321-390 MeV; measured evaporation residue σ above, around, below the fusion barriers; deduced fusion probabilities, barrier distributions. ¹⁷⁹Au, ^180,182Hg, ¹⁸⁴Pb deduced γ-transitions. Enriched targets, velocity filter, parallel-plate avalanche counter, surface-barrier detectors.

doi: 10.1016/0375-9474(86)90514-2
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1986SC07 Phys.Lett. 168B, 39 (1986)

K.-H.Schmidt, R.S.Simon, J.-G.Keller, F.P.Hessberger, G.Munzenberg, B.Quint, H.-G.Clerc, W.Schwab, U.Gollerthan, C.-C.Sahm

Gamma-Spectroscopic Investigations in the Radiative Fusion Reaction ⁹⁰Zr + ⁹⁰Zr

NUCLEAR REACTIONS ⁹⁰Zr(⁹⁰Zr, X), E=358 MeV; measured radiative fusion Eγ, Iγ; deduced reaction mechanism. ¹⁸⁰Hg deduced statistical deexcitation, E1 transition strength.

doi: 10.1016/0370-2693(86)91456-5
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1985HO29 Nucl.Phys. A447, 335c (1985)

S.Hofmann, P.Armbruster, G.Munzenberg, W.Reisdorf, K.-H.Schmidt, H.G.Burkhard, F.P.Hessberger, H.-J.Schott, Y.K.Agarwal, G.Berthes, U.Gollerthan, H.Folger, R.Hingmann, J.G.Keller, M.E.Leino, P.Lemmertz, M.Montoya, K.Poppensieker, B.Quint, I.Zychor

The Influence of the Surprising Decay Properties of Element 108 on Search Experiments for New Elements

RADIOACTIVITY ²⁶⁰Sg(α) [from ²⁰⁸Pb(⁵⁴Cr, 2n), E=4.92 MeV/nucleon]; measured T_1/2; deduced SF(T_1/2) limit, branching ratio. ²⁵⁶Rf(SF) [from ²⁶⁰Sg(α-decay)]; measured T_1/2. ²⁶⁰Sg, ²⁵⁶Rf deduced mass excess.

doi: 10.1016/0375-9474(86)90615-9
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1985MU11 Z.Phys. A322, 227 (1985)

G.Munzenberg, S.Hofmann, H.Folger, F.P.Hessberger, J.Keller, K.Poppensieker, B.Quint, W.Reisdorf, K.-H.Schmidt, H.J.Schott, P.Armbruster, M.E.Leino, R.Hingmann

The Isotopes of ²⁵⁹106, ²⁶⁰106, and ²⁶¹106

NUCLEAR REACTIONS ²⁰⁸Pb(⁵⁴Cr, n), (⁵⁴Cr, 2n), E=257, 263, 268 MeV; ²⁰⁷Pb(⁵⁴Cr, n), (⁵⁴Cr, 2n), E=262 MeV; measured Eα, Iα, αα-correlation; deduced evidence for ²⁵⁹Sg, ²⁶⁰Sg, ²⁶¹Sg.

RADIOACTIVITY ²⁶¹Sg(α) [from ²⁰⁸Pb(⁵⁴Cr, n), E=257-268 MeV]; measured Eα, Iα, T_1/2; deduced α-branching ratio. ²⁶⁰Sg(α) [from ^207,208Pb(⁵⁴Cr, xn), E=257-268 MeV]; measured Eα, Iα; deduced α-branching ratio, shell effects. ²⁵⁶Rf(SF) [from ²⁶⁰Sg(α-decay)]; measured T_1/2. ²⁵⁹Sg(α) [from ²⁰⁷Pb(⁵⁴Cr, 2n), E=262 MeV]; measured Eα, Iα, T_1/2.

1985SA21 Nucl.Phys. A441, 316 (1985)

C.-C.Sahm, H.-G.Clerc, K.-H.Schmidt, W.Residorf, P.Armbruster, F.P.Hessberger, J.G.Keller, G.Munzenberg, D.Vermeulen

Fusion Probability of Symmetric Heavy, Nuclear Systems Determined from Evaporation-Residue Cross Sections

NUCLEAR REACTIONS ^172,173,176Yb(⁴⁸Ca, X), E=196-225 MeV; ^121,123Sb(⁸⁶Kr, X), E=337-389 MeV; ^90,92,94,96Zr(¹²⁴Sn, X), E=472-569 MeV; measured evaporation residue σ; deduced fusion probabilities. Enriched targets, velocity filter, secondary electron detector, surface-barrier detectors, delayed coincidences.

doi: 10.1016/0375-9474(85)90036-3
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1984CL03 Nucl.Phys. A419, 571 (1984)

H.-G.Clerc, J.G.Keller, C.-C.Sahm, K.-H.Schmidt, H.Schulte, D.Vermeulen

Fusion-Fission and Neutron-Evaporation-Residue Cross Sections in ⁴⁰Ar- and ⁵⁰Ti- Induced Fusion Reactions

NUCLEAR REACTIONS ¹⁶⁵Ho, ¹⁶⁹Tm, ¹⁷⁴Yb, ¹⁷⁵Lu, ^{176,177,178,179,180}Hf, ¹⁸¹Ta, ²⁰⁸Pb(⁴⁰Ar, X), E=170-208 MeV; ²⁰⁸Pb, ²⁰⁹Bi(⁵⁰Ti, X), E=235-260 MeV; measured fusion σ(E), neutron evaporation residue σ(E); deduced fusion barriers, fusion radii. Enriched targets.

doi: 10.1016/0375-9474(84)90634-1
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1984KE03 Phys.Rev. C29, 1569 (1984)

J.G.Keller, K.-H.Schmidt, H.Stelzer, W.Reisdorf, Y.K.Agarwal, F.P.Hessberger, G.Munzenberg, H.-G.Clerc, C.-C.Sahm

Fusion of the System ⁹⁰Zr + ⁹⁰Zr

NUCLEAR REACTIONS, ICPND ⁹⁰Zr(⁹⁰Zr, X), E(cm) ≈ 172-195 MeV; measured compound residue σ(E); deduced fusion barrier, fluctuations.

doi: 10.1103/PhysRevC.29.1569
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1984MU17 Z.Phys. A317, 235 (1984)

G.Munzenberg, P.Armbruster, H.Folger, F.P.Hessberger, S.Hofmann, J.Keller, K.Poppensieker, W.Reisdorf, K.-H.Schmidt, H.-J.Schott, M.E.Leino, R.Hingmann

The Identification of Element 108

RADIOACTIVITY ²⁶⁵Hs(α) [from ²⁰⁸Pb(⁵⁶Fe, n)]; measured T_1/2, Eα. Correlated decay study of ²⁶¹Sg, ²⁵⁷Rf, surface barrier detectors.

NUCLEAR REACTIONS ²⁰⁸Pb(⁵⁶Fe, n), E=5.02 MeV/nucleon; measured Eα; deduced evidence for ²⁶⁵Hs, production σ. Correlated decay study of ²⁶¹Sg, ²⁵⁷Rf, surface barrier detectors.

1984SA24 Z.Phys. A319, 113 (1984)

C.-C.Sahm, H.-G.Clerc, K.-H.Schmidt, W.Reisdorf, P.Armbruster, F.P.Hessberger, J.G.Keller, G.Munzenberg, D.Vermeulen

Hindrance of Fusion in Central Collisions of Heavy, Symmetric Nuclear Systems

NUCLEAR REACTIONS ^92,94,96Zr(¹²⁴Sn, xn), (⁸⁶Kr, xn), E not given; measured evaporation σ(E), fusion probability vs residual excitation; deduced fusion hindrance in symmetric system central collisions.

doi: 10.1007/BF01415623
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1984SC07 Z.Phys. A315, 159 (1984)

K.-H.Schmidt, J.G.Keller, D.Vermeulen

Temperature-Induced Deformation - A Possible Mechanism for Washing Out Spherical Shell Effects in the Nuclear Level Density

NUCLEAR STRUCTURE ²¹⁶Th, ²⁵²Fm; calculated level density; deduced shell effect washout. Shell, rotational motion interplay.

doi: 10.1007/BF01419374
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1984VE09 Z.Phys. A318, 157 (1984)

D.Vermeulen, H.-G.Clerc, C.-C.Sahm, K.-H.Schmidt, J.G.Keller, G.Munzenberg, W.Reisdorf

Cross Sections for Evaporation Residue Production near the N = 126 Shell Closure

NUCLEAR REACTIONS ¹⁶⁵Ho, ¹⁶⁹Tm, ¹⁷⁵Lu, ^171,174Yb, ¹⁸¹Ta, ^{177,178,179,180,176}Hf(⁴⁰Ar, X), E=192 MeV; measured evaporation residue production σ, fragment α-decay, Eα, Iα; deduced low shell stabilizing influence, superheavy production optimum conditions.

doi: 10.1007/BF01413464
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1983HI08 Nucl.Phys. A404, 51 (1983)

R.Hingmann, H.-G.Clerc, C.-C.Sahm, D.Vermeulen, K.-H.Schmidt, J.G.Keller

Evidence for an Isomeric State in ²¹⁶Th

NUCLEAR REACTIONS ¹⁸⁰Hf(⁴⁰Ar, 4n), (⁴⁰Ar, 5n), E=165-200 MeV; measured residuals production σ(E). ¹⁸⁰Hf(⁴⁰Ar, X), E=180 MeV; measured Eα, Iα from evaporation residue decay; deduced evidence for ^216mTh.

RADIOACTIVITY ^216mTh [from ^178,179,180Hf(⁴⁰Ar, xn), E=165-200 MeV]; measured Eα, T_1/2; deduced Iα, Iγ. Comparison with ^217mPa decay.

doi: 10.1016/0375-9474(83)90413-X
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1983HI12 Z.Phys. A313, 141 (1983)

R.Hingmann, H.-G.Clerc, C.-C.Sahm, D.Vermeulen, K.-H.Schmidt, J.G.Keller

Identification of ²²²U and ²²¹Pa by α-Correlation Chains

RADIOACTIVITY ²²²U(α) [from W(⁴⁰Ar, 4n), E=4.5 MeV/nucleon]; ²²¹Pa(α) [from ¹⁸⁶W(⁴⁰Ar, 4np), E=4.72 MeV/nucleon]; measured αα-correlation; deduced T_1/2.

NUCLEAR REACTIONS W(⁴⁰Ar, 4n), E=4.5 MeV/nucleon; ¹⁸⁶W(⁴⁰Ar, 4np), E=4.72 MeV/nucleon; measured αα-correlation; deduced evidence for ²²²U, ²²¹Pa.

doi: 10.1007/BF02115854
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1983KE01 Z.Phys. A311, 243 (1983)

J.G.Keller, H.-G.Clerc, K.-H.Schmidt, Y.K.Agarwal, F.P.Hessberger, R.Hingmann, G.Munzenberg, W.Reisdorf, C.C.Sahm

Observation of Radiative Capture in the Reaction ⁹⁰Zr + ⁹⁰Zr

NUCLEAR REACTIONS ⁹⁰Zr(⁹⁰Zr, X), E=351, 360 MeV; measured Eα, Iα following evaporation residue decay; deduced heavy system radiative capture.

doi: 10.1007/BF01415109
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1982HI14 Z.Phys. A309, 27 (1982)

R.Hingmann, H.-G.Clerc, C.-C.Sahm, D.Vermeulen, K.-H.Schmidt, J.G.Keller

Alpha Decay Properties of ¹⁹⁹Rn and ^199mRn

NUCLEAR REACTIONS ⁸⁶Kr(¹¹⁶Sn, X), (¹¹⁶Sn, 2n), (¹¹⁶Sn, 3n), E=345-385 MeV; measured residual production σ vs E, (evaporation residue)(α)(t), αα(t). ^199m,199Rn levels deduced α-decay T_1/2, decay characteristics, possible J, π. Correlation analysis, shell model.

doi: 10.1007/BF01420147
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1981SC14 Z.Phys. A301, 21 (1981)

K.-H.Schmidt, P.Armbruster, F.P.Hessberger, G.Munzenberg, W.Reisdorf, C.-C.Sahm, D.Vermeulen, H.-G.Clerc, J.Keller, H.Schulte

The Barrier for Compound-Nucleus Formation in the Nearly Symmetric Systems ⁸⁶Kr + ¹²³Sb → ²⁰⁹Fr and ¹²⁴Sn + ⁹⁴Zr → ²¹⁸Th

NUCLEAR REACTIONS ¹²³Sb(⁸⁶Kr, xn), E(cm)=197.5-230 MeV; ⁹⁴Zr(¹²⁴Sn, xn), E(cm)=210-245 MeV; measured σ(fusion, E); ⁹⁴Zr(¹²⁴Sn, xn), E(cm)=207.5-245 MeV; measured σ(evaporation residue vs E), σ(fusion, E); deduced compound nucleus formation barrier. Velocity filter, ΔE-E detectors, α identification technique, enriched target.

doi: 10.1007/BF01412459
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1980SA24 Z.Phys. A297, 241 (1980)

C.-C.Sahm, H.Schulte, D.Vermeulen, J.Keller, H.-G.Clerc, K.-H.Schmidt, F.Hessberger, G.Munzenberg

The Influence of the Fission Barrier on the Mass Distribution in Reactions with Symmetric Fragmentation

NUCLEAR REACTIONS, Fission ¹⁴⁴Sm, ¹⁷⁶Hf(⁴⁰Ar, X), (⁴⁰Ar, F), E=190 MeV; ²⁰⁸Pb(⁴⁰Ar, X), (⁴⁰Ar, F), E=208 MeV; ¹⁶⁵Ho, ¹⁷⁵Lu, ¹⁸¹Ta(⁴⁰Ar, X), (⁴⁰Ar, F), E not given; measured σ(fragment mass, E). ¹⁸⁴Hg, ²⁰⁵At, ²¹⁵Ac, ²¹⁶Th, ²²¹Pa, ²⁴⁸Fm deduced symmetric fission fragmentation contribution, fission barrier influence.

doi: 10.1007/BF01892804
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Note: The following list of authors and aliases matches the search parameter J.Keller: , J.G.KELLER, J.H.KELLER, J.M.KELLER