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NSR database version of May 24, 2024.

Search: Author = G.Wirth

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2006EI01      Radiochim.Acta 94, 181 (2006)

R.Eichler, W.Bruchle, R.Buda, S.Burger, R.Dressler, Ch.E.Dullmann, J.Dvorak, K.Eberhardt, B.Eichler, C.M.Folden III, H.W.Gaggeler, K.E.Gregorich, F.Haenssler, D.C.Hoffman, H.Hummrich, E.Jager, J.V.Kratz, B.Kuczewski, D.Liebe, D.Nayak, H.Nitsche, D.Piguet, Z.Qin, U.Rieth, M.Schadel, B.Schausten, E.Schimpf, A.Semchenkov, S.Soverna, R.Sudowe, N.Trautmann, P.Thorle, A.Turler, B.Wierczinski, N.Wiehl, P.A.Wilk, G.Wirth, A.B.Yakushev, A.von Zweidorf

Attempts to chemically investigate element 112

NUCLEAR REACTIONS 238U(48Ca, X), E=231, 235 MeV; measured delayed fission, Eα, (fission)α-coin; deduced no evidence for 283Cn. Thermochromatography.

doi: 10.1524/ract.2006.94.4.181
Citations: PlumX Metrics


2004GA18      Nucl.Phys. A734, 208 (2004)

H.W.Gaggeler, W.Bruchle, Ch.E.Dullmann, R.Dressler, K.Eberhardt, B.Eichler, R.Eichler, C.M.Folden, T.N.Ginter, F.Glaus, K.E.Gregorich, F.Haenssler, D.C.Hoffman, E.Jager, D.T.Jost, U.W.Kirbach, J.V.Kratz, H.Nitsche, J.B.Patin, V.Pershina, D.Piguet, Z.Qin, U.Rieth, M.Schadel, E.Schimpf, B.Schausten, S.Soverna, R.Sudowe, P.Thorle, N.Trautmann, A.Turler, A.Vahle, P.A.Wilk, G.Wirth, A.B.Yakushev, A.von Zweidorf

Chemical and nuclear studies of hassium and element 112

NUCLEAR REACTIONS 248Cm(26Mg, 4n), (26Mg, 5n), E=145 MeV; 238U(48Ca, 3n), E=239 MeV; measured yields. Chemical properties discussed.

doi: 10.1016/j.nuclphysa.2004.01.036
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2004VO24      Radiochim.Acta 92, 855 (2004)

A.von Zweidorf, R.Angert, W.Bruchle, S.Burger, K.Eberhardt, R.Eichler, H.Hummrich, E.Jager, H.-O.Kling, J.V.Kratz, B.Kuczewski, G.Langrock, M.Mendel, U.Rieth, M.Schadel, B.Schausten, E.Schimpf, P.Thorle, N.Trautmann, K.Tsukada, N.Wiehl, G.Wirth

Evidence for the formation of sodium hassate(VIII)

NUCLEAR REACTIONS 248Cm(26Mg, xn), E=144-149 MeV; measured delayed αα-coin; deduced evidence for 269,270Hs. Radiochemical analysis.

RADIOACTIVITY 269,270Hs, 265,266Sg, 257No(α); 261,262Rf(SF) [from 248Cm(26Mg, xn) and subsequent decay]; measured Eα, T1/2.

doi: 10.1524/ract.92.12.855.55112
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2003DU27      Czech.J.Phys. (Supplement) 53, A291 (2003)

Ch.E.Dullmann, R.Dressler, B.Eichler, H.W.Gaggeler, F.Glaus, D.T.Jost, D.Piguet, S.Soverna, A.Turler, W.Bruchle, R.Eichler, E.Jager, V.Pershina, M.Schadel, B.Schausten, E.Schimpf, H.-J.Schott, G.Wirth, K.Eberhardt, P.Thorle, N.Trautmann, T.N.Ginter, K.E.Gregorich, D.C.Hoffman, U.W.Kirbach, D.M.Lee, H.Nitsche, J.B.Patin, R.Sudowe, P.M.Zielinski, S.N.Timokhin, A.B.Yakushev, A.Vahle, Z.Qin

First chemical investigation of hassium (Hs, Z=108)

RADIOACTIVITY 269,270Hs(α); measured Eα, Iα.

doi: 10.1007/s10582-003-0037-4
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2003TU05      Eur.Phys.J. A 17, 505 (2003)

A.Turler, Ch.E.Dullmann, H.W.Gaggeler, U.W.Kirbach, A.B.Yakushev, M.Schadel, W.Bruchle, R.Dressler, K.Eberhardt, B.Eichler, R.Eichler, T.N.Ginter, F.Glaus, K.E.Gregorich, D.C.Hoffman, E.Jager, D.T.Jost, D.M.Lee, H.Nitsche, J.B.Patin, V.Pershina, D.Piguet, Z.Qin, B.Schausten, E.Schimpf, H.-J.Schott, S.Soverna, R.Sudowe, P.Thorle, S.N.Timokhin, N.Trautmann, A.Vahle, G.Wirth, P.M.Zielinski

On the decay properties of 269Hs and indications for the new nuclide 270Hs

NUCLEAR REACTIONS 248Cm(26Mg, xn), E=143.7-146.8 MeV; measured residual nucleus decay; deduced evidence for 269,270Hs. Chemical separation.

RADIOACTIVITY 269,270Hs, 265,266Sg, 261Rf, 257No(α) [from 248Cm(26Mg, xn) and subsequent decay]; measured Eα, T1/2. 261,262Rf(SF); measured fission fragment energies.

doi: 10.1140/epja/i2002-10163-0
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2002DU21      Nature(London) 418, 859 (2002)

Ch.E.Dullmann, W.Bruchle, R.Dressler, K.Eberhardt, B.Eichler, R.Eichler, H.W.Gaggeler, T.N.Ginter, F.Glaus, K.E.Gregorich, D.C.Hoffman, E.Jager, D.T.Jost, U.W.Kirbach, D.M.Lee, H.Nitsche, J.B.Patin, V.Pershina, D.Piguet, Z.Qin, M.Schadel, B.Schausten, E.Schimpf, H.-J.Schott, S.Soverna, R.Sudowe, P.Thorle, S.N.Timokhin, N.Trautmann, A.Turler, A.Vahle, G.Wirth, A.B.Yakushev, P.M.Zielinski

Chemical investigation of hassium (element 108)

RADIOACTIVITY 269,270Hs, 265,266Sg, 261Rf(α) [from 248Cm(26Mg, xn) and subsequent decay]; measured Eα. Chemical properties of hassium discussed.

doi: 10.1038/nature00980
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1998SC50      Radiochim.Acta 83, 163 (1998)

M.Schadel, W.Bruchle, E.Jager, B.Schausten, G.Wirth, W.Paulus, R.Gunther, K.Eberhardt, J.V.Kratz, A.Seibert, E.Strub, P.Thorle, N.Trautmann, A.Waldek, S.Zauner, D.Schumann, U.Kirbach, B.Kubica, R.Misiak, Y.Nagame, K.E.Gregorich

Aqueous Chemistry of Seaborgium (Z=106)


1997FU04      Z.Phys. A357, 303 (1997)

F.Funke, G.Wirth, J.V.Kratz, W.Bruchle, W.Fan, K.Summerer

Quasielastic Transfer Reactions in 238U + 197Au and 197Au + 197Au Collisions Near the Coulomb Barrier

NUCLEAR REACTIONS 197Au(238U, X)198Au/199Au/198mAu/196Au/196mAu, E=5.3-6.56 MeV/nucleon; 197Au(197Au, X)198Au/198mAu/196Au/196mAu, E=4.8-5.6 MeV/nucleon; measured residual production associated σ(θ); deduced missing transfer σ, ground state Q-value correlations for central collisions.

doi: 10.1007/s002180050247
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1997SC48      Radiochim.Acta 77, 149 (1997)

M.Schadel, W.Bruchle, B.Schausten, E.Schimpf, E.Jager, G.Wirth, R.Gunther, J.V.Kratz, W.Paulus, A.Seibert, P.Thorle, N.Trautmann, S.Zauner, D.Schumann, M.Andrassy, R.Misiak, K.E.Gregorich, D.C.Hoffman, D.M.Lee, E.R.Sylwester, Y.Nagame, Y.Oura

First Aqueous Chemistry with Seaborgium (Element 106)

RADIOACTIVITY 265,266Sg(α), (SF) [from 248Cm(22Ne, xn)]; measured T1/2. Chemical separation.


1997SC49      Nature(London) 388, 55 (1997)

M.Schadel, W.Bruchle, R.Dressler, B.Eichler, H.W.Gaggeler, R.Gunther, K.E.Gregorich, D.C.Hoffman, S.Hubener, D.T.Jost, J.V.Kratz, W.Paulus, D.Schumann, S.Timokhin, N.Trautmann, A.Turler, G.Wirth, A.Yakushev

Chemical properties of element 106 (seaborgium)

RADIOACTIVITY 265,266Sg(α) [from 248Cm(22Ne, X)265Sg/266Sg]; measured Eα, Iα, chemical properties.


1996BL22      Z.Phys. A356, 49 (1996)

Th.Blaich, J.V.Kratz, R.Schmoll, K.Summerer, G.Wirth

Dynamical Intermediate-Mass Fragment Production in 197Au + 197Au Collisions at Energies ≤ 15 MeV/u

NUCLEAR REACTIONS 197Au(197Au, X), E=9-15 MeV/nucleon; measured intermediate mass fragment production data; analyzed fission products mass distribution; deduced two-step mechanism role in former case. Catcher foil experiments, foil stacks, off-line assay of X-ray, γ-ray spectroscopy.

doi: 10.1007/s002180050147
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1994AU02      Nucl.Phys. A569, 157c (1994)

T.Aumann, W.Bruchle, M.Fauerbach, J.C.Hill, J.V.Kratz, M.Schadel, E.Stiel, K.Summerer, G.Wirth

Evidence for Two-Phonon Giant-Dipole Excitation from Inclusive Measurements of 197Au Target Dissociation

NUCLEAR REACTIONS 197Au(20Ne, X), E=1.7 GeV/nucleon; 197Au(86Kr, X), (197Au, X), (209Bi, X), E=1 GeV/nucleon; measured target electromagnetic dissociation σ. Activation technique, model comparison.

doi: 10.1016/0375-9474(94)90106-6
Citations: PlumX Metrics


1994PO24      Z.Phys. A350, 221 (1994)

S.Polikanov, W.Bruchle, H.Folger, E.Jager, T.Krogulski, M.Schadel, E.Schimpf, G.Wirth, T.Aumann, J.V.Kratz, E.Stiel, N.Trautmann

Electromagnetic and Nuclear Fission of 238U in the Reaction of 100, 500, and 1000A.MeV 208Pb with 238U

NUCLEAR REACTIONS, ICPND 238U(208Pb, F), (238U, F), E=100-1000 MeV/nucleon; measured electromagnetic, nuclear fission fragment velocity distributions; deduced fission σ(E) for the two processes.

doi: 10.1007/BF01289586
Citations: PlumX Metrics


1992RE06      Z.Phys. A342, 411 (1992)

W.Reisdorf, J.V.Kratz, R.Bellwied, W.Bruchle, H.Keller, K.Lutzenkirchen, M.Schadel, K.Summerer, G.Wirth

Competition between Binary Reactions and Fusion in Heavy-Ion Collisions at the Coulomb Barrier

NUCLEAR REACTIONS 76Ge(86Kr, X), E=3.22 MeV/nucleon; 104Ru(86Kr, X), E=3.84, 3.64 MeV/nucleon; 130Te(84Kr, X), E=3.96 MeV/nucleon; measured residual production σ for X=Zn to Ce isotopes, mass, charge distributions; deduced reseparation channels main components.

doi: 10.1007/BF01294952
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1991FU07      Z.Phys. A340, 303 (1991)

F.Funke, J.V.Kratz, N.Trautmann, N.Wiehl, G.Wirth, W.Bruchle, F.Wo, K.Summerer

Cross Sections for Nuclear Reactions in Collisions of 238U + 238U and 238U + 197Au Near and Below the Coulomb Barrier

NUCLEAR REACTIONS 197Au, 238U(238U, X), E=5.38-6.56 MeV/nucleon; measured transfer reaction σ, X=237,240U, 238,239Np, 234,232Pa, 227,228Th, 225,226Ac, 223,224,225Ra; deduced no evidence for long-lived di-nuclear systems.

doi: 10.1007/BF01294679
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1991WI07      Phys.Lett. 253B, 28 (1991)

G.Wirth, F.Funke, W.Bruchle, F.Wo, J.V.Kratz, K.Summerer, N.Trautmann

One-Neutron Transfer in 238U + 197Au Collisions

NUCLEAR REACTIONS 197Au(238U, X), E=5.36 MeV/nucleon; measured σ(θ) for X=239,237U; deduced one-neutron transfer probabilities.

doi: 10.1016/0370-2693(91)91358-3
Citations: PlumX Metrics


1990SC11      Z.Phys. A335, 421 (1990)

U.W.Scherer, W.Bruchle, M.Brugger, C.Frink, H.Gaggeler, G.Herrmann, J.V.Kratz, K.J.Moody, M.Schadel, K.Summerer, N.Trautmann, G.Wirth

Reactions of 40Ar with 233U, 235U, and 238U at the Barrier

NUCLEAR REACTIONS, ICPND 233,235,238U(40Ar, X), E ≈ 5.3 MeV/nucleon; measured residual yields for Z=86-98. 235U(40Ar, X), E ≈ 5.3 MeV/nucleon; measured Eα, Iα; deduced tentative decay chains for 233,235,238U(40Ar, xn) residues.

RADIOACTIVITY 270Ds, 269Ds, 272Ds, 271Ds, 275Ds, 274Ds; analyzed calculated Eα, α-decay T1/2; deduced tentative decay chains.


1988WI11      Z.Phys. A330, 87 (1988)

G.Wirth, W.Bruchle, F.Wo, K.Summerer, F.Funke, J.V.Kratz, N.Trautmann, V.E.Oberacker

Fission in 238U + 238U Collisions Below the Coulomb Barrier

NUCLEAR REACTIONS 238U(238U, F), E=5.4-6.2 MeV/nucleon; measured fission σ(E); 239U(238U, X), E=5.05-6.07 MeV/nucleon; calculated one-nucleon transfer σ(θ); deduced reaction mechanism.


1987HI12      Nucl.Instrum.Methods Phys.Res. A260, 407 (1987)

N.Hildebrand, C.Frink, N.Greulich, U.Hickmann, J.V.Kratz, N.Trautmann, G.Herrmann, M.Brugger, H.Gaggeler, K.Summerer, G.Wirth

A Cryosystem for the Detection of Alpha and Spontaneous-Fission Activities in Volatile Species

NUCLEAR REACTIONS 248Cm(48Ca, X)210Rn/211Rn/212Rn/219Rn/220Rn/221Rn/222Rn, E not given; 238U(238U, X)210Rn/211Rn/212Rn/219Rn/220Rn/221Rn/222Rn, E=6.5, 7.45 MeV/nucleon; measured residual production σ vs mass.

doi: 10.1016/0168-9002(87)90108-2
Citations: PlumX Metrics


1987KE01      Z.Phys. A326, 313 (1987)

H.Keller, K.Lutzenkirchen, J.V.Kratz, G.Wirth, W.Bruchle, K.Summerer

Evidence for Quasi-Fission in 40Ar + 208Pb Collisions near the Coulomb-Barrier

NUCLEAR REACTIONS 208Pb(40Ar, X), E=4.75, 5.22 MeV/nucleon; measured fragment σ(θ). Enriched target. Extra push model.


1987KE06      Z.Phys. A328, 255 (1987)

H.Keller, R.Bellwied, K.Lutzenkirchen, J.V.Kratz, W.Bruchle, H.Gaeggeler, K.J.Moody, M.Schadel, G.Wirth

Unusual Excitation-Energy Division in Quasi-Fission Reactions between 50Ti, 54Cr and 58Fe with 207,208Pb at the Barrier

NUCLEAR REACTIONS 207Pb(50Ti, X), (50Ti, F), E=4.85 MeV/nucleon; 208Pb(54Cr, X), (54Cr, F), E=4.9 MeV/nucleon; 208Pb(58Fe, X), (58Fe, F), E=5.02 MeV/nucleon; 209Bi(58Fe, X), (58Fe, F), E=5.15 MeV/nucleon; measured fragment mass, charge distributions, σ(Z, A), fission product γ-decay; deduced fission σ vs fragment Z.


1986GA06      Phys.Rev. C33, 1983 (1986)

H.Gaggeler, W.Bruchle, M.Brugger, M.Schadel, K.Summerer, G.Wirth, J.V.Kratz, M.Lerch, Th.Blaich, G.Herrmann, N.Hildebrand, N.Trautmann, D.Lee, K.J.Moody, K.E.Gregorich, R.B.Welch, G.T.Seaborg, D.C.Hoffman, W.R.Daniels, M.M.Fowler, H.R.von Gunten

Production of Cold Target-Like Fragments in the Reaction of 48Ca + 248Cm

NUCLEAR REACTIONS 248Cm(Ca, X)210Rn/211Rn/212Rn/219Rn/220Rn/221Rn/222Rn/221Ra/222Ra/223Ra/223Ac/224Ac/225Ac/226Ac/225Th/226Th/227Th/228Th/230U/237U/236Pu/238Pu/243Pu/245Pu/246Pu, E=248-263 MeV; measured residuals yields, σ vs mass; deduced production mechanism.

doi: 10.1103/PhysRevC.33.1983
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2553.


1986KR02      Phys.Rev. C33, 504 (1986)

J.V.Kratz, W.Bruchle, H.Folger, H.Gaggeler, M.Schadel, K.Summerer, G.Wirth, N.Greulich, G.Herrmann, U.Hickmann, P.Peuser, N.Trautmann, E.K.Hulet, R.W.Lougheed, J.M.Nitschke, R.L.Ferguson, R.L.Hahn

Search for Superheavy Elements in Damped Collisions between 238U and 248Cm

NUCLEAR REACTIONS 248Cm(238U, X), E=6.2-7.3 MeV/nucleon; measured SF-fission fragment kinetic energies, neutron multiplicities; deduced superheavy nuclei production σ upper limit. Chemical separation, spontaneous fission counting.

doi: 10.1103/PhysRevC.33.504
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1986LU04      Nucl.Phys. A452, 351 (1986)

K.Lutzenkirchen, J.V.Kratz, G.Wirth, W.Bruchle, K.Summerer, R.Lucas, J.Poitou, C.Gregoire

Angular Distributions in Quasi-Fission Reactions

NUCLEAR REACTIONS 208Pb(50Ti, X), E=5, 5.5 MeV/nucleon; 208Pb(56Fe, X), E=5.7, 6.1, 6.8, 8.3 MeV/nucleon; measured fragment K X-rays, relative σ(fragment θ, Z); deduced tilting variance, tilting mode degree of relaxation, γ-multiplicity, timescale comparison.

doi: 10.1016/0375-9474(86)90312-X
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1986WI11      Phys.Lett. 177B, 282 (1986)

G.Wirth, W.Bruchle, M.Brugger, F.Wo, K.Summerer, F.Funke, J.V.Kratz, M.Lerch, N.Trautmann

Sub-Coulomb Transfer in 238U + 238U Collisions

NUCLEAR REACTIONS 238U(238U, 239U), E=1071-1452 MeV; measured σ(E), σ(θ). Ge(Li) detectors. Semiclassical approach calculations.

doi: 10.1016/0370-2693(86)90753-7
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1985AR02      Phys.Rev.Lett. 54, 406 (1985)

P.Armbruster, Y.K.Agarwal, W.Bruchle, M.Brugger, J.P.Dufour, H.Gaggeler, F.P.Hessberger, S.Hofmann, P.Lemmertz, G.Munzenberg, K.Poppensieker, W.Reisdorf, M.Schadel, K.-H.Schmidt, J.H.R.Schneider, W.F.W.Schneider, K.Summerer, D.Vermeulen, G.Wirth, A.Ghiorso, K.E.Gregorich, D.Lee, M.Leino, K.J.Moody, G.T.Seaborg, R.B.Welch, P.Wilmarth, S.Yashita, C.Frink, N.Greulich, G.Herrmann, U.Hickmann, N.Hildebrand, J.V.Kratz, N.Trautmann, M.M.Fowler, D.C.Hoffman, W.R.Daniels, H.R.von Gunten, H.Dornhofer

Attempts to Produce Superheavy Elements by Fusion of 48Ca with 248Cm in the Bombarding Energy Range of 4.5-5.2 MeV/u

NUCLEAR REACTIONS 248Cm(48Ca, X), E=4.5-5.2 MeV/nucleon; measured superheavy production σ upper limits vs T1/2. Different separation techniques.

doi: 10.1103/PhysRevLett.54.406
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1985HO13      Phys.Rev. C31, 1763 (1985)

D.C.Hoffman, M.M.Fowler, W.R.Daniels, H.R.von Gunten, D.Lee, K.J.Moody, K.Gregorich, R.Welch, G.T.Seaborg, W.Bruchle, M.Brugger, H.Gaggeler, M.Schadel, K.Summerer, G.Wirth, Th.Blaich, G.Herrmann, N.Hildebrand, J.V.Kratz, M.Lerch, N.Trautmann

Excitation Functions for Production of Heavy Actinides from Interactions of 40Ca and 48Ca Ions with 248Cm

NUCLEAR REACTIONS 248Cm(40Ca, X)244Bk/245Bk/246Bk/248Bk/248mBk/250Bk/245Cf/246Cf/248Cf/250Cf/252Cf/249Es/250Es/252Es/253Es/254Es/254mEs/250Fm/251Fm/252Fm/254Fm/256Fm, E=221-294 MeV; 248Cm(48Ca, X)245Bk/246Bk/248Bk/248mBk/250Bk/246Cf/248Cf/250Cf/252Cf/253Cf/254Cf/250Es/252Es/253Es/254Es/254mEs/252Fm/254Fm/255Fm/256Fm, E=223-318 MeV; measured residuals production σ(E).

doi: 10.1103/PhysRevC.31.1763
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2551.


1985LU01      Z.Phys. A320, 529 (1985)

K.Lutzenkirchen, J.V.Kratz, G.Wirth, W.Bruchle, L.Dorr, K.Summerer, R.Lucas, J.Poitou, C.Gregoire, S.Bjornholm

Angular Distributions in Quasi-Fission Reactions: Evidence for incomplete relaxation of the tilting mode

NUCLEAR REACTIONS 208Pb(50Ti, X), E=5, 5.5 MeV/nucleon; 208Pb(56Fe, X), E=5.7-8.3 MeV/nucleon; measured σ(fragment θ, Z); deduced reaction mechanism.


1985PE13      Nucl.Instrum.Methods 239, 529 (1985)

P.Peuser, U.Tharun, H.J.Keim, N.Trautmann, G.Herrmann, G.Wirth

A Low Background Detection System for Fragments and Neutrons from Spontaneous Fission Sources

RADIOACTIVITY 248Cm(SF); measured (fragment)(n)-, (fragment)(fragment)(n-), (fragment)(fragment)-coin. Low background detection system.

doi: 10.1016/0168-9002(85)90032-4
Citations: PlumX Metrics


1985RE03      Nucl.Phys. A438, 212 (1985)

W.Reisdorf, F.P.Hessberger, K.D.Hildenbrand, S.Hofmann, G.Munzenberg, K.-H.Schmidt, J.H.R.Schneider, W.F.W.Schneider, K.Summerer, G.Wirth, J.V.Kratz, K.Schlitt

Fusion Near the Threshold: A comparative study of the system 40Ar + 112,116,112Sn and 40Ar + 144,148,154Sm

NUCLEAR REACTIONS 112,116,122Sn, 144,148,154Sm(40Ar, X), (40Ar, F), E=125-179 MeV; measured evaporation residues, fission; deduced fusion σ around, below Coulomb barrier. 152,156,162Er, 184,188,194Hg, 144,148,154Sm deduced barrier height, barrier fluctuation, role of coupling to inelastic, transfer channels, partial wave distribution above barrier. Enriched targets, velocity filter, K X-ray and γ-ray activation method, ionization chamber.

doi: 10.1016/0375-9474(85)90125-3
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1985RE11      Nucl.Phys. A444, 154 (1985)

W.Reisdorf, F.P.Hessberger, K.D.Hildenbrand, S.Hofmann, G.Munzenberg, K.-H.Schmidt, W.F.W.Schneider, K.Summerer, G.Wirth, J.V.Kratz, K.Schlitt, C.-C.Sahm

Fusability and Fissionability in 86Kr-Induced Reactions Near and Below the Fusion Barrier

NUCLEAR REACTIONS 70,76Ge, 92,100Mo, 99,102,104Ru(86Kr, X), E=257-369 MeV; measured evaporation residues; deduced evaporation residue σ at, below Coulomb barrier, barrier height, barrier fluctuation, role of coupling to inelastic channels. 156,162Er, 178,186Pt, 185,188,190Hg deduced effective fission barriers. Enriched targets, velocity filter, K X-ray activation method.

doi: 10.1016/0375-9474(85)90296-9
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1984GA06      Z.Phys. A316, 291 (1984)

H.Gaggeler, T.Sikkeland, G.Wirth, W.Bruchle, W.Bogl, G.Franz, G.Herrmann, J.V.Kratz, M.Schadel, K.Summerer, W.Weber

Probing Sub-Barrier Fusion and Extra-Push by Measuring Fermium Evaporation Residues in Different Heavy Ion Reactions

NUCLEAR REACTIONS 206,207Pb(40Ar, F), E ≤ 236 MeV; measured fission activity decay curve. 204,206,207,208Pb(40Ar, xn)242Fm/243Fm/244Fm/246Fm, E ≤ 236 MeV; 208Pb(40Ar, 4n), (40Ar, 2n)244Fm/246Fm, E ≤ 236 MeV; 206Pb(40Ar, 2n), 207Pb(40Ar, 3n)244Fm, E ≤ 236 MeV; 170Er(76Ge, 2n)244Fm, E=321-394 MeV; 160Gd(86Kr, 2n)244Fm, E=352-409 MeV; 110Pd(136Xe, 2n)244Fm, E=587-680 MeV; measured residuals production σ; deduced fusion barriers. Extra push, surface friction models.


1984LU01      Nucl.Phys. A413, 516 (1984)

R.Lucas, C.Gregoire, C.Ngo, J.Poitou, E.Tomasi, A.Gobbi, A.Olmi, H.Sann, G.Wirth, J.V.Kratz, U.Lynen

Equilibration of the Neutron-to-Proton Ratio for Heavy Asymmetric Systems in Heavy-Ion Collisions

NUCLEAR REACTIONS 74Ge(208Pb, X), E=1550 MeV; 197Au(86Kr, X), E=550 MeV; measured σ(fragment) vs mass, charge, variances; deduced neutron to proton ratio equilibration differences. Heavy asymmetric systems.

doi: 10.1016/0375-9474(84)90425-1
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1984LU05      Z.Phys. A317, 55 (1984)

K.Lutzenkirchen, J.V.Kratz, W.Bruchle, H.Gaggeler, K.Summerer, G.Wirth

Fusion-Fission in the Reaction 76Ge + 170Er

NUCLEAR REACTIONS 170Er(76Ge, X), E(cm)=222-272 MeV; measured σ(fragment θ, Z) vs fragment mass, relative yield vs normalized mass number; deduced fission-fusion σ. Extra push model.


1982RE18      Phys.Rev.Lett. 49, 1811 (1982)

W.Reisdorf, F.P.Hessberger, K.D.Hildenbrand, S.Hofmann, G.Munzenberg, K.-H.Schmidt, J.H.R.Schneider, W.F.W.Schneider, K.Summerer, G.Wirth, J.V.Kratz, K.Schlitt

Influence of Collective Surface Motion on the Threshold Behavior of Nuclear Fusion

NUCLEAR REACTIONS, ICPND 112,116,122Sn, 144,148,154Sm(40Ar, X), E=3.2-4.5 MeV/nucleon; measured fusion σ vs E; deduced barrier fluctuation effects.

doi: 10.1103/PhysRevLett.49.1811
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1982SC05      Phys.Rev.Lett. 48, 852 (1982)

M.Schadel, W.Bruchle, H.Gaggeler, J.V.Kratz, K.Summerer, G.Wirth, G.Herrmann, R.Stakemann, G.Tittel, N.Trautmann, J.M.Nitschke, E.K.Hulet, R.W.Lougheed, R.L.Hahn, R.L.Ferguson

Actinide Production in Collisions of 238U with 248Cm

NUCLEAR REACTIONS 248Cm(238U, X), E=7.4 MeV/nucleon; measured production σ for 244,246,248,250,251Bk, 246,248,250,251,252,253,254Cf, 252,253,254,255,256Es, 252,253,254,255,256Fm, 255,256,257,258Md; deduced dominant transfer reaction deexcitation channel.

doi: 10.1103/PhysRevLett.48.852
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1981GA25      Nucl.Instrum.Methods 188, 367 (1981)

H.Gaggeler, W.Bruchle, J.V.Kratz, M.Schadel, K.Summerer, W.Weber, G.Wirth, G.Herrmann

A Rotating Wheel System for the Detection of Spontaneously Fissioning Nuclides from Heavy Ion Reactions

RADIOACTIVITY, Fission 252Cf(SF), 244Fm(SF) [from 207Pb(40Ar, 3n), E=199 MeV]; 242mAm(SF) [from 238U(238U, X), E=7.6 MeV/nucleon]; measured T1/2. Rotating wheel technique, catcher foil, fission tract detectors.

NUCLEAR REACTIONS 238U(238U, X), E=7.6 MeV/nucleon; 207Pb(40Ar, 3n), E=199 MeV; measured production σ(E) for 244Fm, 242Am. Rotating wheel technique, catcher foil, fission track detectors.


1981KR05      Nucl.Phys. A357, 437 (1981)

J.V.Kratz, J.Poitou, W.Bruchle, H.Gaggeler, M.Schadel, G.Wirth, R.Lucas

Primary Mass and Charge Distributions in the Reaction of 900 MeV 132Xe Ions with 197Au

NUCLEAR REACTIONS 197Au(132Xe, X), E=900 MeV; measured σ(fragment Z, mass) for 51 ≤ Z ≤ 87, missing mass, fragment velocities; deduced integral charge, mass distributions, preneutron emission σ(fragment Z, E, mass). Neutron, proton exchange correlations.

doi: 10.1016/0375-9474(81)90231-1
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1981PO01      Nucl.Instrum.Methods 180, 221 (1981)

J.Poitou, J.V.Kratz, G.Wirth, R.Lucas

On the Reconstruction of Primary Mass and Charge Distributions from Measured Secondary Quantities in Damped Heavy-Ion Collisions

NUCLEAR REACTIONS 197Au(132Xe, X), E=900 MeV; measured Eγ, Iγ, E(X-ray), I(X-ray), (X-ray)γ-coin; deduced yields for Hf, Ta, W, Re, Os, Ir, Pt, Au, Hg, Tl, Pb, most probable isotope distribution < A > vs Z, charge variances vs total excitation energy. Preevaporation distribution evaluation from post evaporation measurements.

doi: 10.1016/0029-554X(81)90033-1
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1980GA24      Phys.Rev.Lett. 45, 1824 (1980)

H.Gaggeler, N.Trautmann, W.Bruchle, G.Herrmann, J.V.Kratz, P.Peuser, M.Schadel, G.Tittel, G.Wirth, H.Ahrens, H.Folger, G.Franz, K.Summerer, M.Zendel

Search for Superheavy Elements in the 238U +238U Reaction

NUCLEAR REACTIONS, Fission 238U(238U, X), (238U, F), E=8.6 MeV/nucleon; measured fragment E, spontaneous fission(fragment)(fragment)-coin; deduced superheavy production σ upper limit. Thick target.

doi: 10.1103/PhysRevLett.45.1824
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1980KR14      Z.Phys. A296, 141 (1980)

J.V.Kratz, W.Bruchle, H.Gaeggeler, M.Schadel, K.Summerer, G.Wirth

Fast A/Z Equilibration and Correlated Nucleon Exchange in Damped Collisions of 56Fe Ions with 209Bi

NUCLEAR REACTIONS 209Bi(56Fe, X), E=8.3 MeV/nucleon; analyzed average fragment mass to charge ratio, mass, charge variances ratio data; deduced fast charge equilibration, fully correlated nucleon exchange.

doi: 10.1007/BF01412655
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1980ST11      Z.Phys. A295, 269 (1980)

R.G.Stokstad, W.Reisdorf, K.D.Hildenbrand, J.V.Kratz, G.Wirth, R.Lucas, J.Poitou

The Sub-Barrier Fusion of 40Ar with 144,148,154Sm

NUCLEAR REACTIONS 144,148,154Sm(40Ar, X), E=3.6-4.5 MeV/nucleon; measured I(K X-ray)(t, fragment E); deduced evaporation-residue production σ, fusion-fission σ. ΔE-E ionization chamber.

doi: 10.1007/BF01412207
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1979KR17      Nucl.Phys. A332, 477 (1979)

J.V.Kratz, W.Bruchle, G.Franz, M.Schadel, I.Warnecke, G.Wirth, M.Weis

Study of the N/Z Ratios of Light and Heavy Fragments from Collisions of 129Xe, 132Xe and 136Xe with 197Au Near the Interaction Barrier

NUCLEAR REACTIONS 197Au(129Xe, X), E ≤ 761 MeV; 197Au(132Xe, X), E ≤ 764 MeV; 197Au(136Xe, X), E ≤ 787 MeV; measured fragment production σ, missing mass; deduced charge, mass distributions. Damped collision model.

doi: 10.1016/0375-9474(79)90014-9
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1979LU04      Z.Phys. A290, 327 (1979)

R.Lucas, J.Poitou, J.V.Kratz, G.Wirth

Study of the Heavy Products from 84Kr + 238U Collisions at 522 MeV

NUCLEAR REACTIONS 238U(84Kr, X), E=522 MeV; measured σ(θx), integral σ; deduced reaction mechanism. Catcher foil technique, X-ray identification of reaction products.

doi: 10.1007/BF01408550
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1979PO22      Phys.Lett. 88B, 69 (1979)

J.Poitou, R.Lucas, J.V.Kratz, W.Bruchle, H.Gaggeler, M.Schadel, G.Wirth

Second Moments of N/Z-Distributions in Damped Collisions of 132Xe with 197Au

NUCLEAR REACTIONS 197Au(132Xe, X), E=890 MeV; measured I(X-ray), E(X-ray), Eγ, Iγ, γX-ray-coin; deduced charge variances at fixed mass asymmetry. Classical statistical fluctuation model.

doi: 10.1016/0370-2693(79)90116-3
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1978GA12      Z.Phys. A286, 419 (1978)

H.Gaggeler, W.Bruchle, H.Ahrens, H.Folger, G.Franz, J.V.Kratz, M.Schadel, I.Warnecke, G.Wirth, N.Trautmann, G.Herrmann, N.Kaffrell, P.Peuser, G.Tittel

Search for Long-Lived Superheavy Elements in the Reaction of 136Xe with 238U

NUCLEAR REACTIONS 238U(136Xe, X), E=6.6 MeV/nucleon; measured formation σ for superheavy elements with 1-200 day T1/2.


1978KR17      S.Afr.J.Phys. 1, 154 (1978)

J.V.Kratz, H.Ahrens, W.Bruchle, H.Gaggeler, M.Schadel, I.Warnecke, G.Wirth, G.Herrmann, N.Trautmann, M.Weis

Correlations between Proton and Neutron Exchanges in Damped Collisions of 129,132,136Xe + Au and 238U + 238U

NUCLEAR REACTIONS 197Au(129Xe, X), (132Xe, X), (136Xe, X), 238U(238U, X), E=5.9 MeV/nucleon; analyzed isotope distribution vs Z; deduced different p, n strength correlations for Au+Xe, U+U systems.


1978SC22      Phys.Rev.Lett. 41, 469 (1978)

M.Schadel, J.V.Kratz, H.Ahrens, W.Bruchle, G.Franz, H.Gaggeler, I.Warnecke, G.Wirth, G.Herrmann, N.Trautmann, M.Weis

Isotope Distributions in the Reaction of 238U with 238U

NUCLEAR REACTIONS 238U(238U, X), E=1785 MeV; measured σ(A, Z). Radiochemically determined σ.

doi: 10.1103/PhysRevLett.41.469
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1977KR10      Phys.Rev.Lett. 39, 984 (1977)

J.V.Kratz, H.Ahrens, W.Bogl, W.Bruchle, G.Franz, M.Schadel, I.Warnecke, G.Wirth, G.Klein, M.Weis

Charge-Asymmetry Equilibration in the Reaction of 129,132,136Xe with 197Au Near the Interaction Barrier

NUCLEAR REACTIONS 197Au(129Xe, X), E=761 MeV; 197Au(132Xe, X), E=769 MeV; 197Au(136Xe, X), E=795 MeV; measured σ(A, Z); deduced proton, neutron population ratios.

doi: 10.1103/PhysRevLett.39.984
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1975WI08      Z.Phys. A272, 291 (1975)

G.Wirth, N.Kaffrell, K.Chayawattanangkur, G.Herrmann, K.E.Seyb

Decay of the 4.2-min 152Pm into Levels of 152Sm

RADIOACTIVITY 152,152mPm; measured Eγ, Iγ, γγ-coin, T1/2; deduced Qβ, log ft. 152Sm deduced levels, J, π, K, B(E2).

doi: 10.1007/BF01438023
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