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NSR database version of April 27, 2024.

Search: Author = M.Lehmann

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1992HI05      Phys.Rev. C45, 1229 (1992)

D.J.Hinde, D.Hilscher, H.Rossner, B.Gebauer, M.Lehmann, M.Wilpert

Neutron Emission as a Probe of Fusion-Fission and Quasifission Dynamics

NUCLEAR REACTIONS U, ¹⁹⁷Au, ¹⁶⁹Tm, ^154,144Sm, ¹²⁴Sn(¹⁸O, nF), E=158.8 MeV; U, ²⁰⁸Pb, ¹⁹⁷Au, ¹⁸⁴W, ¹⁵⁴Sm, ¹⁰⁹Ag(¹⁶O, nF), E=288 MeV; U, ²⁰⁸Pb, ¹⁹⁷Au, ¹⁸¹Ta, ¹⁶⁵Ho, ¹⁶⁹Tm, ¹⁴¹Pr(⁴⁰Ar, nF), E=249 MeV; U, ²⁰⁸Pb, ¹⁹⁷Au, ¹⁷⁵Lu, ¹⁵⁴Sm(⁶⁴Ni, nF), E=417.7 MeV; measured fission (fragment)n(θ), σ(fragment mass, total kinetic energy); deduced pre-, post-scission neutron multiplicities, pre-scission time-scales.

doi: 10.1103/PhysRevC.45.1229
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1992OB04      Nucl.Phys. A548, 525 (1992)

A.Oberstedt, P.von Neumann-Cosel, A.Richter, W.Rosch, G.Schrieder, D.Bellm, R.Gentner, K.Keller, L.Lassen, U.Seibert, D.Hilscher, M.Lehmann

Light-Particle Emission and Heavy-Residue Formation in the Fusion-Like Reactions ⁴⁰Ar + ⁴⁰Ca at 15 MeV/u and ²⁸Si + ²⁸Si at 20 MeV/u

NUCLEAR REACTIONS ⁴⁰Ar(⁴⁰Ca, X), E=15 MeV/nucleon; ²⁸Si(²⁸Si, X), E=20 MeV/nucleon; measured evaporation residue σ(A, Z, multiplicity, θ), light particle σ(E, θ); deduced light particle equilibrium, preequilibrium multiplicities. Discussed mass balance, residue formation. Quantal phase space model.

doi: 10.1016/0375-9474(92)90699-K
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1991MO01      Phys.Rev. C43, 716 (1991)

E.Mordhorst, M.Strecker, H.Frobeen, M.Gasthuber, W.Scobel, B.Gebauer, D.Hilscher, M.Lehmann, H.Rossner, Th.Wilpert

Time Scales for Binary Fragmentations of Highly Excited, Fissile Nuclei from ³²S + ¹⁹⁷Au, ²³²Th

NUCLEAR REACTIONS ¹⁹⁷Au, ²³²Th(³²S, F), E=838 MeV; measured fission (fragment)n-coin, mass yields; deduced different neutron multiplicities for symmetric, asymmetric fragmentation, binary fragmentation time scales.

doi: 10.1103/PhysRevC.43.716
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1989HI03      Phys.Rev.Lett. 62, 1099 (1989)

D.Hilscher, H.Rossner, B.Cramer, B.Gebauer, U.Jahnke, M.Lehmann, E.Schwinn, M.Wilpert, Th.Wilpert, H.Frobeen, E.Mordhorst, W.Scobel

Observation of Cold Scission of Highly Excited Fissioning Nuclei

NUCLEAR REACTIONS ^144,154Sm(³²S, X), E=26.2 MeV/nucleon; measured fission neutron multiplicity. ^176,186Pt deduced fission time scale.

doi: 10.1103/PhysRevLett.62.1099
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1989RO18      Phys.Rev. C40, 2629 (1989)

H.Rossner, D.Hilscher, D.J.Hinde, B.Gebauer, M.Lehmann, M.Wilpert, E.Mordhorst

Analysis of Pre- and Post-Scission Neutrons Emitted in the Reaction ¹⁶⁹Tm(³⁶Ar, F) at E(lab) = 205 MeV

NUCLEAR REACTIONS ¹⁶⁹Tm(³⁶Ar, F), E=205 MeV; measured fission (fragment)n-coin; deduced pre-, post-scission neutron multiplicities, fission average decay time.

doi: 10.1103/PhysRevC.40.2629
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1989SC34      Nucl.Phys. A502, 551c (1989)

E.Schwinn, B.Cramer, G.Ingold, U.Jahnke, D.Hilscher, M.Lehmann, H.Rossner

Fission-Fragment Angular Distributions Under Extreme Conditions: Following sequential to deep-inelastic collisions and complete fusion in ⁴⁰Ar(10 MeV/u) + (Nat)U

NUCLEAR REACTIONS U(⁴⁰Ar, X), (⁴⁰Ar, F), E=10 MeV/nucleon; measured fission, evaporation residue (fragment)n-coin; deduced fission mechanisms.

doi: 10.1016/0375-9474(89)90688-X
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1988GA21      Z.Phys. A331, 63 (1988)

J.Galin, G.Ingold, U.Jahnke, D.Hilscher, M.Lehmann, H.Rossner, E.Schwinn

Cross Measurements of Linear Momentum Transfer and Energy Dissipation in Collisions between 290 MeV ²⁰Ne and ²³⁸U

NUCLEAR REACTIONS ²³⁸U(²⁰Ne, F), E=290 MeV; measured fission fragment folding angle distribution, neutron multiplicity distribution; deduced linear momentum transfer.

1987SC11      Nucl.Instrum.Methods Phys.Res. A256, 457 (1987)

L.Schmieder, D.Hilscher, H.Rossner, U.Jahnke, M.Lehmann, K.Ziegler, H.-H.Knitter

Neutron Yields of ^6,7Li-Induced Reactions on Thick ⁷Li-, ⁹Be, ¹²C-, and (nat)Cu-Targets

NUCLEAR REACTIONS ⁷Li, ⁹Be, ¹²C, Cu(⁶Li, nX), (⁷Li, nX), (d, n), E=40 MeV; measured neutron yields, σ(θn), angle-energy corrections. Tof.

doi: 10.1016/0168-9002(87)90289-0
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1986JA08      Phys.Rev.Lett. 57, 190 (1986)

U.Jahnke, G.Ingold, D.Hilscher, M.Lehmann, E.Schwinn, P.Zank

Violence of Heavy-Ion Reactions from Neutron Multiplicity: (11 to 20) A-MeV ²⁰Ne + ²³⁸U

NUCLEAR REACTIONS ²³⁸U(²⁰Ne, F), E=220, 290, 400 MeV; measured fission fragment spectra, σ(fragment θ, θn), (fragment)n-coin; deduced neutron multiplicity dependence on intrinsic excitation, linear momentum transfer.

doi: 10.1103/PhysRevLett.57.190
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1986ZA02      Phys.Rev. C33, 519 (1986)

W.P.Zank, D.Hilscher, G.Ingold, U.Jahnke, M.Lehmann, H.Rossner

Fusion-Fission Dynamics at High Excitation Energies Studied by Neutron Emission

NUCLEAR REACTIONS ¹⁴¹Pr(⁴⁰Ar, nX), (⁴⁰Ar, nF), E=316 MeV; ¹⁷⁵Lu(¹²C, nX), (¹²C, nF), E=192 MeV; measured fission fragment, evaporation residue σ(θ), (fragment)n-coin; deduced fusion-fission dynamics, prescission, postscission neutron multiplicities.

doi: 10.1103/PhysRevC.33.519
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