Nuclear Science References (NSR)

NUCLEAR REACTIONS Be, ¹⁹⁷Au(p, X), E=450 GeV; measured neutral meson associated invariant mass, transverse momentum spectra, production σ; deduced target mass dependence.

doi: 10.1007/s100529800804
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1983GL02 Z.Phys. A310, 189 (1983)

P.Glassel, D.v.Harrach, H.J.Specht, L.Grodzins

Observation of Proximity- and Non-Equilibrium Effects in Ternary Heavy Ion Reactions

NUCLEAR REACTIONS ¹⁶⁶Er(⁸⁴Kr, X), ¹²²Sn(¹²⁹Xe, X), E=12.5 MeV/nucleon; measured fragment mass < A >, variances vs total kinetic energy loss; deduced reaction mechanism. Binary, ternary events.

1983HA29 Phys.Scr. T5, 183 (1983)

D.Habs, U.v.Helmolt, H.W.Heyng, R.Kroth, B.Kolb, D.Pelte, D.Schwalm, H.J.Specht, W.Hennerici, H.J.Hennrich, G.Himmele, R.Repnow, W.Wahl, R.S.Simon, R.Albrecht, V.Metag

First Results on γ-Ray Spectroscopy in the Second Minimum of ²³⁸U and ²⁴⁰Pu

RADIOACTIVITY ^238mU(SF) [from ²³⁸U(d, pn), E=20 MeV]; ^240mPu(SF) [from ²³⁸U(α, 2n), E=25 MeV]; measured prefission γ-spectra, γ(delayed-fission)-coin. ²³⁸U, ²⁴⁰Pu deduced second minimum vibrational band deexcitation transitions. Crystal ball.

doi: 10.1088/0031-8949/1983/T5/035
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1983HI09 Nucl.Phys. A404, 401 (1983)

G.Himmele, H.Backe, P.A.Butler, D.Habs, V.Metag, H.J.Specht, J.B.Wilhelmy

Measurements of Nuclear Reaction Cross Sections for ^183,184W + ²³⁸U near the Interaction Barrier

NUCLEAR REACTIONS ²³⁸U(¹⁸⁴W, ¹⁸²W), (¹⁸⁴W, ¹⁸³W), (¹⁸⁴W, ¹⁸⁵W), (¹⁸⁴W, ¹⁸⁶W), (¹⁸³W, ¹⁸³W'), E ≈ interaction barrier; measured σ(transfer), fission σ; deduced transfer, fission probabilities.

doi: 10.1016/0375-9474(83)90556-0
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1982GL03 Phys.Rev.Lett. 48, 1089 (1982)

P.Glassel, D.v.Harrach, L.Grodzins, H.J.Specht

Direct Observation of Nonequilibrium Effects in Sequential Fission

NUCLEAR REACTIONS, Fission ¹²²Sn(¹²⁹Xe, F), E=12.5 MeV/nucleon; measured fragment yield, relative velocity, average pair mass fraction vs φ; deduced nonequilibrium effects in sequential fission. Three-body channels, kinematically complete experiment.

doi: 10.1103/PhysRevLett.48.1089
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1982GO02 Phys.Rev.Lett. 48, 1160 (1982)

U.Goerlach, D.Habs, V.Metag, B.Schwartz, H.J.Specht, H.Backe

Lowest β-Vibrational Phonon in the Second Minima of ^236,238U

NUCLEAR REACTIONS, Fission ^236,238U(d, np), E=20 MeV; measured I(ce), ce(fragment)(t). ^236,238U deduced shape isomer decay characteristics, K/L ratio, transition multipolarity, vibrational band characteristics.

doi: 10.1103/PhysRevLett.48.1160
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1982HA14 Phys.Rev.Lett. 48, 1093 (1982)

D.v.Harrach, P.Glassel, L.Grodzins, S.S.Kapoor, H.J.Specht

Direct Observation of Proximity Effects in Ternary Heavy-Ion Reactions

NUCLEAR REACTIONS, Fission ¹⁶⁶Er, ⁹⁰Zr(⁸⁴Kr, F), E=12.4 MeV/nucleon; ¹²²Sn(¹²⁹Xe, F), E=12.5 MeV/nucleon; measured fragment mass, total kinetic energy distributions; deduced reaction mechanism, proximity effects, scission to scission time. Two-, three-body channels, kinematically complete experiments.

doi: 10.1103/PhysRevLett.48.1093
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1982HI16 Nucl.Phys. A391, 191 (1982)

G.Himmele, H.Backe, P.A.Butler, D.Habs, V.Metag, J.B.Wilhelmy, H.J.Specht

Experimental Features of Coulomb Fission

NUCLEAR REACTIONS ²³⁸U(¹⁵²Sm, ¹⁵²Sm'), ²³⁸U(¹⁸⁴W, ¹⁸⁴W'), ²³²Th(¹⁸⁴W, ¹⁸⁴W'), ²⁴⁸Cm(²³²Th, ²³²Th'), E ≈ Coulomb barrier; measured fission σ following inelastic scattering. ²³²Th, ²³⁸U, ²⁴⁸Cm deduced fission probability. Enriched target.

doi: 10.1016/0375-9474(82)90227-5
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1980ME15 Phys.Rep. 65, 1 (1980)

V.Metag, D.Habs, H.J.Specht

Spectroscopic Properties of Fission Isomers

NUCLEAR STRUCTURE A=230-250; compiled, reviewed fission isomers data; deduced superdeformed related features.

doi: 10.1016/0370-1573(80)90006-X
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1979BA02 Phys.Rev.Lett. 42, 490 (1979)

H.Backe, L.Richter, D.Habs, V.Metag, J.Pedersen, P.Singer, H.J.Specht

Spectroscopy in the Second Minimum of the Potential Energy Surface of ²³⁹Pu

RADIOACTIVITY ^239mPu [from ²³⁸U(α, 3n), E=33 MeV]; measured E(ce), I(ce). ²³⁹Pu deduced levels in second minimum, J, π, δ, rotational parameters. Nilsson assignments.

doi: 10.1103/PhysRevLett.42.490
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1979BA42 Phys.Rev.Lett. 43, 1077 (1979)

H.Backe, F.Weik, P.A.Butler, V.Metag, J.B.Wilhelmy, D.Habs, G.Himmele, H.J.Specht

Direct Observation of Coulomb Fission of ²³⁸U with ¹⁸⁴W Projectiles

NUCLEAR REACTIONS ²³⁸U(¹⁸⁴W, ¹⁸⁴W'F), E=5-6 MeV/nucleon; measured I(ce), ce fragment-coin, Coulomb excitation σ(E), σ(fission).

doi: 10.1103/PhysRevLett.43.1077
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1979FR10 Z.Phys. A292, 171 (1979)

H.Freiesleben, K.D.Hildenbrand, F.Puhlhofer, W.F.W.Schneider, R.Bock, D.v.Harrach, H.J.Specht

The Reaction ²³⁸U + ²³⁸U at 7.42 MeV/u

NUCLEAR REACTIONS ²³⁸U(²³⁸U, ²³⁸U), ²³⁸U(²³⁸U, X), E=1766 MeV; measured σ(θ), σ(Eα), α(X-ray)-coin; deduced production σ for ^208,210Po, ²¹¹At, ²²²Rn, ^223,224,225Ra, ^225,226Ac, ^227,228Th, ²³⁰U, ²³⁰Pa, superheavy nuclei.

doi: 10.1007/BF01441624
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1979GL03 Phys.Rev.Lett. 43, 1483 (1979)

P.Glassel, D.v.Harrach, Y.Civelekoglu, R.Manner, H.J.Specht, J.B.Wilhelmy, H.Freiesleben, K.D.Hildenbrand

Three-Particle Exclusive Measurements of the Reactions ²³⁸U + ²³⁸U and ²³⁸U + ²⁴⁸Cm

NUCLEAR REACTIONS ²³⁸U, ²⁴⁸Cm(²³⁸U, F), E=7.5 MeV/nucleon; measured σ(θ). Kinematically complete experiment, three-body breakup.

doi: 10.1103/PhysRevLett.43.1483
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1979HA24 Phys.Rev.Lett. 42, 1728 (1979)

D.v.Harrach, P.Glassel, Y.Civelekoglu, R.Manner, H.J.Specht

Angular Momentum Transfer in Deeply Inelastic Collisions from Exclusive Sequential-Fission Experiments

NUCLEAR REACTIONS ⁵⁸Ni, ⁹⁰Zr(²⁰⁸Pb, X), (²³⁸U, X), E=7.5 MeV/amu; measured fission-fragment angular correlation; deduced reaction mechanism. Kinematically complete experiment.

doi: 10.1103/PhysRevLett.42.1728
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1979UL01 Phys.Rev.Lett. 42, 1596 (1979)

G.Ulfert, V.Metag, D.Habs, H.J.Specht

Quadrupole Moment of the 200-ns Fission Isomer in ²³⁷U

NUCLEAR REACTIONS ²³⁸U(d, pn), E=20 MeV; measured yield of fission-isomeric recoil. ^238mU level deduced quadrupole moment.

doi: 10.1103/PhysRevLett.42.1596
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1978GO10 Z.Phys. A287, 171 (1978)

U.Goerlach, D.Habs, M.Just, V.Metag, P.Paul, H.J.Specht, H.J.Maier

Resonances in the Isomeric and Prompt Fission Probabilities of ²⁴⁰Pu

NUCLEAR REACTIONS ²³⁹Pu(d, p), E=11 MeV; measured proton-fragment time distributions, prompt, delayed fission σ; deduced fission probability.

doi: 10.1007/BF01408087
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1978HA05 Z.Phys. A285, 53 (1978)

D.Habs, H.Klewe-Nebenius, V.Metag, B.Neumann, H.J.Specht

Determination of the Fission Barrier of ²³²Pu from β-Delayed Fission And the Problem of the First Barrier

RADIOACTIVITY ²³²Am; measured T_1/2; deduced EC/fission.

NUCLEAR REACTIONS ²³⁷Np(α, F), E=104 MeV; measured delayed fission activiy. ²³²Pu deduced barrier height.

doi: 10.1007/BF01410224
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1978HI09 Nukleonika 23, 347 (1978)

K.D.Hildenbrand, H.Freiesleben, F.Puhlhofer, W.F.W.Schneider, R.Bock, D.v.Harrach, H.J.Specht

Reactions Induced by ²³⁸U on ²³⁸U at 1766 MeV

NUCLEAR REACTIONS ²³⁸U(²³⁸U, X), E=1766 MeV; measured σ(E(A), Z, θ).

1978JU01 Nucl.Instrum.Methods 148, 283 (1978)

M.Just, D.Habs, V.Metag, H.J.Specht

A Position Sensitive Parallel Plate Avalanche Detector (PPAD) for Fission Fragments

RADIOACTIVITY, Fission ²⁵²Cf (SF); measured prompt, delayed fission yields.

NUCLEAR REACTIONS ²³⁹Pu(d, p), E=11 MeV; measured prompt, delayed fission yields.

doi: 10.1016/0029-554X(70)90180-1
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1978UL01 Nucl.Instrum.Methods 148, 369 (1978)

G.Ulfert, D.Habs, V.Metag, H.J.Specht

Lifetime Measurements of Nuclear Levels with the Charge Plunger Technique

NUCLEAR REACTIONS ²³⁹Pu(α, 3n), E=27, 33 MeV; measured recoil distance. ²⁴⁰Cm levels deduced T_1/2, Q.

doi: 10.1016/0029-554X(70)90191-6
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1977HA01 Phys.Rev.Lett. 38, 387 (1977)

D.Habs, V.Metag, H.J.Specht, G.Ulfert

Quadrupole Moment of the 8-μs Fission Isomer in ²³⁹Pu

NUCLEAR REACTIONS ²³⁸U(α, 3n), E=33 MeV; measured charge distribution, activity by charge-plunger technique. ²³⁹Pu fission isomer deduced quadrupole moment.

doi: 10.1103/PhysRevLett.38.387
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1977HA37 Z.Phys. A283, 261 (1977)

D.Habs, V.Metag, J.Schukraft, H.J.Specht, C.O.Wene, K.D.Hildenbrand

Fission of ²³⁸U Induced by ¹³⁶Xe for Energies Close to the Coulomb Barrier

NUCLEAR REACTIONS ²³⁸U(¹³⁶Xe, F), E=4.5-5.9 MeV/nucleon; measured σ(θ); deduced reaction mechanism.

doi: 10.1007/BF01407207
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1977HI08 Phys.Rev.Lett. 39, 1065 (1977)

K.D.Hildenbrand, H.Freiesleben, W.F.W.Schneider, R.Bock, D.v.Harrach, H.J.Specht

Reaction between ²³⁸U and ²³⁸U at 7.42 MeV/Nucleon

NUCLEAR REACTIONS ²³⁸U(²³⁸U, X), E=7.42 MeV/nucleon; measured σ(A, Z); deduced upper limit σ for production of superheavy elements.

doi: 10.1103/PhysRevLett.39.1065
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1976GL01 Nucl.Phys. A256, 220 (1976)

P.Glassel, H.Rosler, H.J.Specht

Intermediate Structure in the ²³⁹Pu(d, pf) Reaction

NUCLEAR REACTIONS ²³⁹Pu(d, pF), E=12.5 MeV; measured σ(Ep, θ(F)). ²⁴⁰Pu deduced fission probability, second minimum levels J, π, second minimum level density.

doi: 10.1016/0375-9474(76)90105-6
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1974WE03 Nucl.Phys. A221, 414 (1974)

J.Weber, H.J.Specht, E.Konecny, D.Heunemann

Fragment Mass and Kinetic Energy Distribution in Isomeric Fission of ²⁴⁰Pu

RADIOACTIVITY ^240mPu; measured fragment mass, kinetic energy distribution.

doi: 10.1016/0375-9474(74)90328-5
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset22071.

1973KO17 Phys.Lett. 45B, 329 (1973)

E.Konecny, H.J.Specht, J.Weber

Symmetric and Asymmetric Fission of Ac Isotopes Near the Fission Threshold

NUCLEAR REACTIONS ²²⁶Ra(³He, pF), (³He, dF), E=23.5 MeV; measured P(fragment)(θ), d(fragment)(θ). ^227,228Ac deduced fission probability, fragment anisotropy(E).

doi: 10.1016/0370-2693(73)90047-6
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1972KO10 Nucl.Phys. A187, 426 (1972)

E.Konecny, H.J.Specht, J.Weber, H.Weigmann, R.L.Ferguson, P.Osterman, M.Waldschmidt, G.Siegert

Search for Conversion Electrons Populating the ²³⁶U Fission Isomer

NUCLEAR REACTIONS, Fission ²³⁵U(n, γF), E=thermal; measured (fragment)(ce)-coin, -delay; deduced upper limit for isomeric/prompt fission ratio.

doi: 10.1016/0375-9474(72)90586-6
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1972SP06 Phys.Lett. 41B, 43 (1972)

H.J.Specht, J.Weber, E.Konecny, D.Heunemann

Identification of a Rotational Band in the ²⁴⁰Pu Fission Isomer

RADIOACTIVITY, Fission ²⁴⁰Pu(SF) [from ²³⁸U(α, 2nγ); E=25 MeV]; measured I(ce), (α)(fragment)-delay, E(ce). ^240mPu deduced levels, rotational band structure.

doi: 10.1016/0370-2693(72)90363-2
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