NSR Query Results

Output year order : Descending
Format : Normal

NSR database version of April 27, 2024.

Search: Author = D.Vermeulen

Found 26 matches.

Back to query form

1992GA31      Radiochim.Acta 57, 93 (1992)

H.W.Gaggeler, D.T.Jost, J.Kovacs, U.W.Scherer, A.Weber, D.Vermeulen, A.Turler, K.E.Gregorich, R.A.Henderson, K.R.Czerwinski, B.Kadkhodayan, D.M.Lee, M.Nurmia, D.C.Hoffman, J.V.Kratz, M.K.Gober, H.P.Zimmermann, M.Schadel, W.Bruchle, E.Schimpf, I.Zvara

Gas Phase Chromatography Experiments with Bromides for Tantalum and Element 105

RADIOACTIVITY ^262,263Db(SF) [from ²⁴⁹Bk(¹⁸O, X), E=114 MeV]; measured decay products, Eα, Iα; deduced T_1/2, σ.

1991GA28      Nucl.Instrum.Methods Phys.Res. A309, 201 (1991)

H.W.Gaggeler, D.T.Jost, U.Baltensperger, A.Weber, A.Kovacs, D.Vermeulen, A.Turler

OLGA II, an on-line gas chemistry apparatus for application in heavy element research

RADIOACTIVITY ²¹⁴Po, ^214,215At, ²¹⁸Rn, ²¹⁹Fr, ²²²Ra, ^222,223Ac, ²²⁶Th, ^226,227Pa(α) [from ²³²Th(p, X)]; measured Eα, αα-coin.

doi: 10.1016/0168-9002(91)90103-W
Citations: PlumX Metrics

1991RI07      Z.Phys. A339, 427 (1991)

F.Risse, W.Bertl, P.David, H.Hanscheid, E.Hermes, J.Konijn, C.T.A.M.de Laat, H.Pruys, Ch.F.G.Rosel, W.Schrieder, A.Taal, D.Vermeulen

Muon Attachment in Prompt Fission of ²³⁷Np

NUCLEAR REACTIONS ²³⁷Np(μ^-, F), E at rest; measured fission fragment mass, total kinetic energy release, (fragment)(electron)-coin; deduced fission fragment muon attachment probability.

doi: 10.1007/BF01288426
Citations: PlumX Metrics

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.

1986HE28      J.Less-Common Met. 122, 445 (1986)

F.P.Hessberger, G.Munzenberg, S.Hofmann, P.Armbruster, Y.K.Agarwal, W.Reisdorf, K.Poppensieker, K.-H.Schmidt, J.R.H.Schneider, W.F.W.Schneider, H.J.Schott, C.-C.Sahm, D.Vermeulen, B.Thuma

Experiments on the Synthesis of Neutron-Deficient Isotopes with Atomic Numbers in the Region from Z = 102 to Z = 105

RADIOACTIVITY ^258,257Db, ^256,255Rf, ^254,253Lr(α) [from ^206,208Pb(⁴⁸Ca, xn), E ≈ 15-30 MeV/nucleon; ^207,208Pb, ²⁰⁹Bi(⁵⁰Ti, xn), E=20-35 MeV/nucleon]; measured Eα, T_1/2. ^256,255Rf(SF); measured total kinetic energy release.

NUCLEAR REACTIONS ^206,208Pb(⁴⁸Ca, xn), E ≈ 15-30 MeV/nucleon; ^207,208Pb, ²⁰⁹Bi(⁵⁰Ti, xn)²⁵⁸Db/²⁵⁷Db/²⁵⁵Rf/²⁵⁶Rf/²⁵⁴Lr/²⁵³Lr, E ≈ 20-35 MeV/nucleon; measured evaporation residue, Z=104, 105, Lr isotope production σ(E).

doi: 10.1016/0022-5088(86)90440-6
Citations: PlumX Metrics

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 T_1/2. Different separation techniques.

doi: 10.1103/PhysRevLett.54.406
Citations: PlumX Metrics

1985HE06      Z.Phys. A321, 317 (1985)

F.P.Hessberger, G.Munzenberg, S.Hofmann, W.Reisdorf, K.H.Schmidt, H.J.Schmidt, P.Armbruster, R.Hingmann, B.Thuma, D.Vermeulen

Study of Evaporation Residues Produced in Reaction of ^207,208Pb with ⁵⁰Ti

RADIOACTIVITY ²⁵⁵Rf, ²⁵⁶Rf(SF), (α), ²⁵⁷Rf(α) [from ^208,207Pb(⁵⁰Ti, xn), E=4.75, 4.85 MeV/nucleon]; measured Eα, Iα, α-, SF-decay T_1/2, α-branching.

NUCLEAR REACTIONS ²⁰⁸Pb(⁵⁰Ti, n), (⁵⁰Ti, 2n), (⁵⁰Ti, 3n), ²⁰⁷Pb(⁵⁰Ti, n), (⁵⁰Ti, 2n), E=4.75, 4.85 MeV/nucleon; measured evaporation residue σ, σ(Eα); deduced reaction mechanism, residue SF activity.

1985HE22      Z.Phys. A322, 557 (1985)

F.P.Hessberger, G.Munzenberg, S.Hofmann, Y.K.Agarwal, K.Poppensieker, W.Reisdorf, K.-H.Schmidt, J.R.H.Schneider, W.F.W.Schneider, H.J.Schott, P.Armbruster, B.Thuma, C.-C.Sahm, D.Vermeulen

The New Isotopes ²⁵⁸105, ²⁵⁷105, ²⁵⁴Lr and ²⁵³Lr

RADIOACTIVITY ²⁵⁸Db, ²⁵⁷Db, ^253,254Lr(α) [from ²⁰⁹Bi(⁵⁰Ti, X), E=4.65-4.95 MeV/nucleon]; measured Eα, Iα, T_1/2. ²⁵⁸Rf(SF) [from ²⁵⁸Db(EC-decay)]; measured T_1/2, fission fragment total kinetic energy.

NUCLEAR REACTIONS ²⁰⁹Bi(⁵⁰Ti, X), E=4.65-4.95 MeV/nucleon; measured Eα, Iα, evaporation residue σ(E) for one-, two-neutron emission; deduced evidence for ²⁵⁸Db, ²⁵⁷Db, ^253,254Lr.

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
Citations: PlumX Metrics

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
Citations: PlumX Metrics

1984MU07      Z.Phys. A315, 145 (1984)

G.Munzenberg, W.Reisdorf, S.Hofmann, Y.K.Agarwal, F.P.Hessberger, K.Poppensieker, J.R.H.Schneider, W.F.W.Schneider, K.-H.Schmidt, H.-J.Schott, P.Armbruster, C.-C.Sahm, D.Vermeulen

Evidence for Element 109 from One Correlated Decay Sequence following the Fusion of ⁵⁸Fe with ²⁰⁹Bi

RADIOACTIVITY ²⁶⁶Mt(SF) [from ²⁰⁹Bi(⁵⁸Fe, X), E=5.15 MeV/nucleon]; measured Eα, Iα, αα-coin, SF-decay.

NUCLEAR REACTIONS ²⁰⁹Bi(⁵⁸Fe, X), E=4.95, 5.05, 5.15 MeV/nucleon; measured σ(fragment) vs mass, Eα, Iα, SF-decay; deduced evidence for compound nucleus ²⁶⁶Mt.

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
Citations: PlumX Metrics

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
Citations: PlumX Metrics

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
Citations: PlumX Metrics

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
Citations: PlumX Metrics

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
Citations: PlumX Metrics

1982DA04      Nucl.Phys. A376, 94 (1982)

M.Dahlinger, D.Vermeulen, K.-H.Schmidt

Empirical Saddle-Point and Ground-State Masses as a Probe of the Droplet Model

COMPILATION A=97-253; compiled fission barrier data; deduced fissility parameter isospin dependence. Liquid drop, droplet models.

doi: 10.1016/0375-9474(82)90535-8
Citations: PlumX Metrics

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
Citations: PlumX Metrics

1982MU15      Z.Phys. A309, 89 (1982)

G.Munzenberg, P.Armbruster, F.P.Hessberger, S.Hofmann, K.Poppensieker, W.Reisdorf, J.H.R.Schneider, W.F.W.Schneider, K.-H.Schmidt, C.-C.Sahm, D.Vermeulen

Observation of One Correlated α-Decay in the Reaction ⁵⁸Fe on ²⁰⁹Bi → ²⁶⁷109

RADIOACTIVITY ²⁶⁶Mt [from ²⁰⁹Bi(⁵⁸Fe, n), E=4.95-5.15 MeV/nucleon]; measured Eα, time correlated α-spectra; deduced α-decay chain correlation followed by ²⁵⁸Rf fission. Evaporation residue implantation technique.

NUCLEAR REACTIONS ²⁰⁹Bi(⁵⁸Fe, n), E=4.95-5.15 MeV/nucleon; measured Eα, time correlated α-spectra; deduced evidence for ²⁶⁶Mt. Evaporation residue implantation technique.

1981MU12      Z.Phys. A302, 7 (1981)

G.Munzenberg, S.Hofmann, W.Faust, F.P.Hessberger, W.Reisdorf, K.-H.Schmidt, T.Kitahara, P.Armbruster, K.Guttner, B.Thuma, D.Vermeulen

The New Isotopes ²⁴⁷Md, ²⁴³Fm, ²³⁹Cf, and Investigation of the Evaporation Residues from Fusion of ²⁰⁶Pb, ²⁰⁸Pb, and ²⁰⁹Bi with ⁴⁰Ar

NUCLEAR REACTIONS ²⁰⁶Pb, ²⁰⁸Pb, ²⁰⁹Bi(⁴⁰Ar, X), E=4.8-5.25 MeV/nucleon; measured Eα, α-decay T_1/2; deduced evidence for ²⁴⁷Md, ²³⁹Cf, ²⁴³Fm. In-flight velocity filter evaporation residue separation.

RADIOACTIVITY ²⁴⁷Md, ²³⁹Cf, ²⁴³Fm [from ^206,208Pb, ²⁰⁹Bi(⁴⁰Ar, X), E=4.8-5.25 MeV/nucleon]; measured Eα, T_1/2. In-flight velocity filter evaporation residue separation.

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
Citations: PlumX Metrics

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
Citations: PlumX Metrics

1980VE01      Z.Phys. A294, 149 (1980)

D.Vermeulen, H.-G.Clerc, W.Lang, K.-H.Schmidt, G.Munzenberg

²¹²Th, a New Isotope

RADIOACTIVITY ^212,213,214Th; measured Eα, T_1/2, Qα.

NUCLEAR REACTIONS ¹⁷⁶Hf(⁴⁰Ar, xn), E=170-200 MeV; measured production σ(E) for ^212,213,214Th.

doi: 10.1007/BF01435049
Citations: PlumX Metrics

1979SC09      Nucl.Phys. A318, 253 (1979)

K.-H.Schmidt, W.Faust, G.Munzenberg, H.-G.Clerc, W.Lang, K.Pielenz, D.Vermeulen, H.Wohlfarth, H.Ewald, K.Guttner

Alpha Decay Properties of New Protactinium Isotopes

RADIOACTIVITY ^{215,216,217,218,222}Pa; measured Eα, T_1/2; deduced variation of shell strengths.

NUCLEAR REACTIONS ¹⁸¹Ta(⁴⁰Ar, xn), ¹⁸⁴W(⁴⁰Ar, pn), E=165-202 MeV; measured production σ. Velocity filter, secondary electron-surface barrier detectors. Delayed coin.

doi: 10.1016/0375-9474(79)90482-2
Citations: PlumX Metrics

1978SC04      Z.Phys. A284, 431 (1978)

K.-H.Schmidt, P.Armbruster, W.Faust, S.Hofmann, G.Munzenberg, W.Reisdorf, H.-G.Clerc, W.Lang, D.Vermeulen, H.Ewald, K.Guttner

Dependence of the Evaporation Residue Production on the Excitation Energy of the Compound Nucleus in the Reaction ⁴⁰Ar + ¹⁶⁴Dy

NUCLEAR REACTIONS ¹⁶⁴Dy(⁴⁰Ar, xn); measured σ(E) for X=4-8.

doi: 10.1007/BF01422114
Citations: PlumX Metrics

1978VE04      Z.Phys. A285, 329 (1978)

D.Vermeulen, K.Farzine, H.v.Buttlar

Levels of ¹⁰⁵Pd from the ^105m, g-Ag Decay

RADIOACTIVITY ^105,105mAg; measured anticompton γ-spectrum, Eγ, Iγ. ¹⁰⁵Pd deduced levels, J, π.

doi: 10.1007/BF01408247
Citations: PlumX Metrics