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NSR database version of May 3, 2024.

Search: Author = B.Thuma

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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

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.

1981HO10      Z.Phys. A299, 281 (1981)

S.Hofmann, G.Munzenberg, F.Hessberger, W.Reisdorf, P.Armbruster, B.Thuma

New Neutron Deficient Isotopes in the Range of Elements Tm to Pt

RADIOACTIVITY ^171,170,169Pt, ^166,167Ir, ¹⁶⁴Re; measured Eα, T_1/2; ^{167,166,165,164}Os, ^165,163Re, ^{162,161,160,159}W; measured Eα, Iα, T_1/2, αα-coin; ^155,154Hf [from ^159,158W(α-decay)], ¹⁵⁴Lu [from ¹⁵⁸Ta(α-decay), ¹⁵⁴Hf(β-decay)]; measured β-decay T_1/2. αβα(θ) technique. ¹⁶³Os, ¹⁵⁸W; measured Eα; ¹⁶⁸Pt; measured Eα, αα-coin; ¹⁵⁷Ta, ¹⁵⁶Hf; measured αβα(θ); deduced evidence for ¹⁵³Lu, ¹⁵²Tm, ¹⁵²Yb. Heavy-ion reactions, Mo to Sn, V to Ni targets, velocity filter evaporation residue separation.

doi: 10.1007/BF01443948
Citations: PlumX Metrics

1981MU06      Z.Phys. A300, 107 (1981)

G.Munzenberg, S.Hofmann, F.P.Hessberger, W.Reisdorf, K.H.Schmidt, J.H.R.Schneider, P.Armbruster, C.C.Sahm, B.Thuma

Identification of Element 107 by α Correlation Chains

RADIOACTIVITY ²⁶²Bh [from ²⁰⁹Bi(⁵⁴Cr, n), E=4.85 MeV/nucleon]; ²⁵⁸Db [from ²⁰⁹Bi(⁵⁰Ti, n), E=4.75 MeV/nucleon]; measured Eα, T_1/2. Evaporation residue implantation technique.

NUCLEAR REACTIONS ²⁰⁹Bi(⁵⁴Cr, n), E=4.85 MeV/nucleon; ²⁰⁹Bi(⁵⁰Ti, n), E=4.75 MeV/nucleon; measured Eα, T_1/2; deduced evidence for ²⁶²Bh. 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.