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NSR database version of April 27, 2024.

Search: Author = J.Estevez

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1989BR19      Radiochim.Acta 47, 41 (1989)

H.Bruchertseifer, B.Eichler, J.Estevez, I.Zvara

Fast Continuous Radiochemical Isolation of the Short-Lived Isotopes of Hf, Ta and W Produced by Heavy Ion Induced Reactions

NUCLEAR REACTIONS ¹⁴⁷Sm(²⁰Ne, xn), E=163, 139, 110 MeV; ¹⁴⁴Sm(²²Ne, xn), E=106 MeV; measured residual product γ-spectra; deduced evidence for short-lived W, Ta, Hf isotopes.

RADIOACTIVITY ¹⁶¹Hf [from ¹⁴⁴Sm(²²Ne, 5n), ¹⁴⁷Sm(²⁰Ne, 6n)]; ¹⁶⁴Ta [from ¹⁵¹Eu(²⁰Ne, 7n)]; ¹⁶³Ta [from ¹⁵¹Eu(²⁰Ne, 8n)]; ¹⁶⁷Ta [from ¹⁵¹Eu(²²Ne, 6n)]; ¹⁶⁷W [from ¹⁵⁴Gd(²⁰Ne, 7n)]; measured γ-spectra; deduced T_1/2, decay properties.

1987ES08      Radiokhimiya 29, 795 (1987); Sov.J.Radiochemistry 29, 751 (1987)

J.Estevez, H.Bruchertseifer, B.Eichler, T.Cruz, I.Zvara

Radiochemical Separation and Identification of Short-Lived Tungsten, Tantalum, and Hafnium Isotopes

NUCLEAR REACTIONS ^151,153Eu(²²Ne, xn), E=133 MeV; measured Eγ, Iγ. ¹⁴⁷Sm(²⁰Ne, xn), E=110, 139, 163 MeV; ¹⁵⁴Gd(²⁰Ne, xnyp), E=170 MeV; measured E(γ), I(γ).

RADIOACTIVITY ¹⁶⁷Ta [from ¹⁵¹Eu(²²Ne, 6n)]; ¹⁶⁷W [from ¹⁵⁴Gd(²⁰Ne, 7n)]; ¹⁶³Hf [from ¹⁴⁴Sm(²²Ne, 3n)]; ¹⁶³Ta [from ¹⁵¹Eu(²⁰Ne, 8n)]; measured T_1/2, E(γ), I(γ).

1984OG03      Radiochim.Acta 37, 113 (1984)

Yu.Ts.Oganessian, M.Hussonnois, A.G.Demin, Yu.P.Kharitonov, H.Bruchertseifer, O.Constantinescu, Yu.S.Korotkin, S.P.Tretyakova, V.K.Utyonkov, I.V.Shirokovsky, J.Estevez

Experimental Studies of the Formation and Radioactive Decay of Isotopes with Z = 104-109

NUCLEAR REACTIONS ²⁰⁸Pb(⁵⁰Ti, γ), (⁵⁰Ti, n), (⁵⁰Ti, 2n), (⁵⁰Ti, 3n), E=5.45 MeV/nucleon; ²⁰⁸Pb(⁴⁹Ti, n), (⁴⁹Ti, 2n), (⁴⁹Ti, nα), (⁴⁹Ti, 2np), E=5.53 MeV/nucleon; ²⁰⁸Pb(⁴⁸Ti, n), (⁴⁸Ti, np), (⁴⁸Ti, α), E=5.4 MeV/nucleon; measured α-, fission fragment numbers; deduced residuals production σ. ²⁰⁹Bi(⁵⁰Ti, n), E=5.3 MeV/nucleon; ²⁰⁹Bi(⁵⁴Cr, n), E=5.4 MeV/nucleon; ²⁰⁸Pb(⁵⁵Mn, n), (⁵⁹Co, n), ²⁰⁹Bi(⁵⁸Fe, n), ²⁰⁸Pb(⁵⁴Cr, n), (⁵⁴Cr, 2n), (⁵⁴Cr, 3n), ²⁰⁸Pb(⁵⁸Fe, n), (⁵⁸Fe, 2n), ²⁰⁷Pb(⁵⁸Fe, n), ²⁰⁹Bi(⁵⁵Mn, n), E=5.5 MeV/nucleon; ²⁰⁹Bi(⁵⁵Mn, np), E=5.55 MeV/nucleon; ²⁰⁸Pb(⁵⁰Ti, n), (⁵⁰Ti, 2n), (⁵⁰Ti, 3n), E=5.45 MeV/nucleon; measured Eα, α-, fission fragment numbers, decay T_1/2; deduced residuals production σ, yields.

RADIOACTIVITY ²⁵⁷Rf, ²⁵⁶Rf, ²⁵⁵Rf, ²⁵⁸Db, ²⁶²Bh, ²⁶⁶Mt, ^261,260,259Sg, ^263,264,265Hs, ^254,256Lr, ²⁵²No [from Pb, ²⁰⁹Bi(^49,50Ti, xn), (⁵⁸Fe, xn), (⁵⁵Mn, xn), E ≈ 5-5.5 MeV/nucleon]; measured decay characteristics. ²⁶⁵Hs, ²⁶⁴Hs, ²⁶³Hs, ²⁶⁶Mt, ²⁶¹Sg, ²⁶⁰Sg, ²⁵⁹Sg deduced α-decay preponderance.

1982BR15      Radiochem.Radioanal.Lett. 51, 319 (1982)

H.Bruchertseifer, B.Eichler, J.Estevez, T.Cruz, I.Zvara

Untersuchung der Produkte der Reaktion ¹⁵¹Eu + ²⁰Ne

RADIOACTIVITY ¹⁶⁵Ta [from ¹⁵¹Eu(²⁰Ne, 6n), E=154, 164 MeV]; measured Eγ, Iγ, T_1/2. ¹⁶⁵Hf deduced levels.

1982BR31      Radiochem.Radioanal.Lett. 54, 1 (1982)

H.Bruchertseifer, B.Eichler, J.Estevez, T.Cruz, I.Zvara

Untersuchung der Produkte der Reaktion ¹⁴⁷Sm + ²⁰Ne

RADIOACTIVITY ^162,163Hf(β⁺), (EC) [from ¹⁴⁷Sm(²⁰Ne, Xn), E=139, 110 MeV]; measured Eγ, Iγ, T_1/2. Chemical separation.

NUCLEAR REACTIONS ¹⁴⁷Sm(²⁰Ne, xn), E=139, 110 MeV; measured Eγ, Iγ; deduced evidence for ^162,163Hf. Chemical separation.

1982EI03      Radiochem.Radioanal.Lett. 53, 161 (1982)

B.Eichler, H.Bruchertseifer, J.Estevez, T.Cruz, I.Zvara

Untersuchung des Neuen Isotops ¹⁶⁴Ta

RADIOACTIVITY ¹⁶⁴Ta(β⁺), (EC) [from ¹⁵¹Eu(²⁰Ne, 7n), E=154, 164 MeV]; measured Eγ, Iγ, T_1/2. Chemical separation, ¹⁶⁴Hf growth, decay.

NUCLEAR REACTIONS ¹⁵¹Eu(²⁰Ne, X), (²⁰Ne, 7n), E=154, 164 MeV; measured Eγ, Iγ; deduced evidence for ¹⁶⁴Ta.