NSR Query Results
Output year order : Descending NSR database version of April 11, 2024. Search: Author = D.C.Hoffman Found 131 matches. Showing 1 to 100. [Next]2009FO02 Phys.Rev. C 79, 027602 (2009) C.M.Folden III, I.Dragojevic, Ch.E.Dullmann, R.Eichler, M.A.Garcia, J.M.Gates, S.L.Nelson, R.Sudowe, K.E.Gregorich, D.C.Hoffman, H.Nitsche Measurement of the 208Pb(52Cr, n)259Sg excitation function NUCLEAR REACTIONS 208Pb(52Cr, n)259Sg, E=250.7-266.2 MeV; 208Pb(52Cr, 2n)258Sg, E=250.7-266.2 MeV. Measured excitation functions, σ. RADIOACTIVITY 259Sg, 258Sg, 255Rf(α), (SF), (EC), 251No(α); measured Eα, half-lives, decay modes.
doi: 10.1103/PhysRevC.79.027602
2008GA25 Phys.Rev. C 78, 034604 (2008) J.M.Gates, S.L.Nelson, K.E.Gregorich, I.Dragojevic, Ch.E.Dullmann, P.A.Ellison, C.M.Folden III, M.A.Garcia, L.Stavsetra, R.Sudowe, D.C.Hoffman, H.Nitsche Comparison of reactions for the production of 258, 257Db: 208Pb(51V, xn) and 209Bi(50Ti, xn) NUCLEAR REACTIONS 208Pb(51V, n), (51V, 2n), E=4.7-5.1 MeV/nucleon; measured excitation function, σ. 209Bi(50Ti, n), (50Ti, 2n); systematics of excitation functions, σ. RADIOACTIVITY 257,258Db, 253,254Lr, 249,250Md, 246Cf, 250Fm, 254No, 245Es(α); measured α-spectra, half-lives.
doi: 10.1103/PhysRevC.78.034604
2007OM01 Eur.Phys.J. D 45, 91 (2007) J.P.Omtvedt, J.Alstad, T.Bjornstad, Ch.E.Dullmann, K.E.Gregorich, D.C.Hoffman, H.Nitsche, K.Opel, D.Polakova, F.Samadani, F.Schulz, G.Skarnemark, L.Stavsetra, R.Sudowe, L.Zheng Chemical properties of the transactinide elements studied in liquid phase with SISAK
doi: 10.1140/epjd/e2007-00214-6
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
2006FO02 Phys.Rev. C 73, 014611 (2006) C.M.Folden III, S.L.Nelson, Ch.E.Dullmann, J.M.Schwantes, R.Sudowe, P.M.Zielinski, K.E.Gregorich, H.Nitsche, D.C.Hoffman Excitation function for the production of 262Bh (Z = 107) in the odd-Z-projectile reaction 208Pb(55Mn, n) NUCLEAR REACTIONS 208Pb(55Mn, n), E=260, 264, 268 MeV; measured delayed Eα, αα-coin, excitation function. 208Pb(55Mn, 2n), E=268 MeV; measured delayed Eα, αα-coin; deduced evidence for 261Bh. Gas-filled separator. RADIOACTIVITY 261,262,262mBh, 257,258Db, 253m,254Lr, 254No, 250Fm(α) [from 208Pb(55Mn, xn) and subsequent decay]; measured Eα, T1/2.
doi: 10.1103/PhysRevC.73.014611
2006GR24 Phys.Rev. C 74, 044611 (2006) K.E.Gregorich, J.M.Gates, Ch.E.Dullmann, R.Sudowe, S.L.Nelson, M.A.Garcia, I.Dragojevic, C.M.Folden III, S.H.Neumann, D.C.Hoffman, H.Nitsche New isotope 264Sg and decay properties of 262-264Sg NUCLEAR REACTIONS 238U(30Si, 4n), (30Si, 5n), (30Si, 6n), E=147-174 MeV; measured delayed Eα, (recoil)α-coin; deduced excitation functions. RADIOACTIVITY 262,264Sg(SF); measured T1/2, α-decay branching upper limit. 263Sg(SF), (α); measured T1/2, branching ratio. 259Rf, 255No; measured T1/2.
doi: 10.1103/PhysRevC.74.044611
2005DU23 Nucl.Instrum.Methods Phys.Res. A551, 528 (2005) Ch.E.Dullmann, C.M.Folden III, K.E.Gregorich, D.C.Hoffman, D.Leitner, G.K.Pang, R.Sudowe, P.M.Zielinski, H.Nitsche Heavy-ion-induced production and physical preseparation of short-lived isotopes for chemistry experiments NUCLEAR REACTIONS Ge(18O, X)83mSr/83Y/84mY/88mY/85Zr/87Zr, E=82.8 GeV; 84Se(18O, X)86mY/85Zr/87Nb/87mNb/88Nb/88Mo, E=82.7 MeV; 124Sn(50Ti, X)168mLu/167Hf/168Hf, E=223.7 MeV; 116Sn(50Ti, X)162Tm/161Yb/162Yb/163Yb/162Lu/162Hf, E=224.4 MeV; measured delayed Eγ, Iγ following residual nucleus decay. Physical preseparation technique.
doi: 10.1016/j.nima.2005.05.077
2005GR19 Phys.Rev. C 72, 014605 (2005) K.E.Gregorich, W.Loveland, D.Peterson, P.M.Zielinski, S.L.Nelson, Y.H.Chung, Ch.E.Dullmann, C.M.Folden III, K.Aleklett, R.Eichler, D.C.Hoffman, J.P.Omtvedt, G.K.Pang, J.M.Schwantes, S.Soverna, P.Sprunger, R.Sudowe, R.E.Wilson, H.Nitsche Attempt to confirm superheavy element production in the 48Ca + 238U reaction NUCLEAR REACTIONS 238U(48Ca, 3n), E=230.3, 235.6 MeV; measured σ upper limits; deduced no evidence for 283Cn. Comparison with previous results.
doi: 10.1103/PhysRevC.72.014605
2005ST16 Nucl.Instrum.Methods Phys.Res. A543, 509 (2005) L.Stavsetra, K.E.Gregorich, J.Alstad, H.Breivik, K.Eberhardt, C.M.Folden III, T.N.Ginter, M.Johansson, U.W.Kirbach, D.M.Lee, M.Mendel, L.A.Omtvedt, J.B.Patin, G.Skarnemark, R.Sudowe, P.A.Wilk, P.M.Zielinski, H.Nitsche, D.C.Hoffman, J.P.Omtvedt Liquid-scintillation detection of preseparated 257Rf with the SISAK-system NUCLEAR REACTIONS 208Pb(50Ti, n), E=237 MeV; measured delayed αα-coin; deduced evidence for 257Rf. Gas-filled separator, fast liquid-liquid extraction system.
doi: 10.1016/j.nima.2004.12.010
2004FO08 Phys.Rev.Lett. 93, 212702 (2004) C.M.Folden III, K.E.Gregorich, Ch.E.Dullmann, H.Mahmud, G.K.Pang, J.M.Schwantes, R.Sudowe, P.M.Zielinski, H.Nitsche, D.C.Hoffman Development of an Odd-Z-Projectile Reaction for Heavy Element Synthesis: 208Pb(64Ni, n)271Ds and 208Pb(65Cu, n)272Rg NUCLEAR REACTIONS 208Pb(64Ni, n), E=311.5, 314.3 MeV; 208Pb(65Cu, n), E=321 MeV; measured measured αα-coin following residual nucleus decay; deduced σ. Gas-filled separator. RADIOACTIVITY 271Ds, 267Hs, 263mSg, 259Rf, 255No(α) [from 208Pb(64Ni, n) and subsequent decay]; 272Rg, 268Mt, 264Bh, 260Db, 256Lr(α) [from 208Pb(65Cu, n) and subsequent decay]; measured Eα, T1/2. Gas-filled separator.
doi: 10.1103/PhysRevLett.93.212702
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
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
2003GI05 Phys.Rev. C 67, 064609 (2003); Erratum Phys.Rev. C 68, 029901 (2003) T.N.Ginter, K.E.Gregorich, W.Loveland, D.M.Lee, U.W.Kirbach, R.Sudowe, C.M.Folden III, J.B.Patin, N.Seward, P.A.Wilk, P.M.Zielinski, K.Aleklett, R.Eichler, H.Nitsche, D.C.Hoffman Confirmation of production of element 110 by the 208Pb(64Ni, n) reaction NUCLEAR REACTIONS 208Pb(64Ni, n), E=312.5, 315, 317.5 MeV: measured delayed (recoil)α-coin; deduced production σ. RADIOACTIVITY 271Ds, 267Hs, 263Sg, 259Rf, 255No(α) [from 208Pb(64Ni, n) and subsequent decay]; measured Eα.
doi: 10.1103/PhysRevC.67.064609
2003GR26 Eur.Phys.J. A 18, 633 (2003) K.E.Gregorich, T.N.Ginter, W.Loveland, D.Peterson, J.B.Patin, C.M.Folden III, D.C.Hoffman, D.M.Lee, H.Nitsche, J.P.Omtvedt, L.A.Omtvedt, L.Stavsetra, R.Sudowe, P.A.Wilk, P.M.Zielinski, K.Aleklett Cross-section limits for the 208Pb(86Kr, n)293118 reaction NUCLEAR REACTIONS 208Pb(86Kr, X), E=449 MeV; measured evaporation residue yields; deduced no evidence for 293Og. 208Pb(86Kr, n), E=449 MeV; deduced production σ upper limit.
doi: 10.1140/epja/i2002-10165-x
2003HO35 Acta Phys.Pol. B34, 1639 (2003) Professor Adam Sobiczewski: Seminal contributions to understanding and predicting nuclear stability of the heaviest elements
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
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
2002KI25 Nucl.Instrum.Methods Phys.Res. A484, 587 (2002) U.W.Kirbach, C.M.Folden III, T.N.Ginter, K.E.Gregorich, D.M.Lee, V.Ninov, J.P.Omtvedt, J.B.Patin, N.K.Seward, D.A.Strellis, R.Sudowe, A.Turler, P.A.Wilk, P.M.Zielinski, D.C.Hoffman, H.Nitsche The Cryo-Thermochromatographic Separator (CTS): A new rapid separation and α-detection system for on-line chemical studies of highly volatile osmium and hassium (Z=108) tetroxides
doi: 10.1016/S0168-9002(01)01990-8
2002NI10 Phys.Rev.Lett. 89, 039901 (2002); see also 1999Ni03 V.Ninov, K.E.Gregorich, W.Loveland, A.Ghiorso, D.C.Hoffman, D.M.Lee, H.Nitsche, W.J.Swiatecki, U.W.Kirbach, C.A.Laue, J.L.Adams, J.B.Patin, D.A.Shaughnessy, D.A.Strellis, P.A.Wilk Editorial Note: Observation of Superheavy Nuclei Produced in the Reaction of 86Kr with 208Pb
doi: 10.1103/PhysRevLett.89.039901
2002SH02 Phys.Rev. C65, 024612 (2002) D.A.Shaughnessy, K.E.Gregorich, J.L.Adams, M.R.Lane, C.A.Laue, D.M.Lee, C.A.McGrath, V.Ninov, J.B.Patin, D.A.Strellis, E.R.Sylwester, P.A.Wilk, D.C.Hoffman Electron-Capture Delayed Fission Properties of 244Es RADIOACTIVITY 244Es(EC) [from 237Np(12C, 5n)]; measured EC-delayed fission T1/2, Eα, fission fragment energies, mass distribution; deduced delayed fission probability. NUCLEAR REACTIONS 237Np(12C, 5n), E=81 MeV; measured σ.
doi: 10.1103/PhysRevC.65.024612
2001SH09 Phys.Rev. C63, 037603 (2001) D.A.Shaughnessy, K.E.Gregorich, M.R.Lane, C.A.Laue, D.M.Lee, C.A.McGrath, D.A.Strellis, E.R.Sylwester, P.A.Wilk, D.C.Hoffman Electron-Capture Delayed Fission Probabilities of 248Es and 246Es RADIOACTIVITY 246,248Es(EC) [from 249Cf(p, xn)]; measured EC-delayed fission probability. Systematics of fission probability vs Q(EC) discussed.
doi: 10.1103/PhysRevC.63.037603
2000EI05 Nature(London) 407, 63 (2000) R.Eichler, W.Bruchle, R.Dressler, Ch.E.Dullmann, B.Eichler, H.W.Gaggeler, K.E.Gregorich, D.C.Hoffman, S.Hubener, D.T.Jost, U.W.Kirbach, C.A.Laue, V.M.Lavanchy, H.Nitsche, J.B.Patin, D.Piguet, M.Schadel, D.A.Shaughnessy, D.A.Strellis, S.Taut, L.Tobler, Y.S.Tsyganov, A.Turler, A.Vahle, P.A.Wilk, A.B.Yakushev Chemical characterization of bohrium (element 107) NUCLEAR REACTIONS 249Bk(22Ne, 4n), E=119 MeV; measured radiochemical yield; deduced chemical properties.
doi: 10.1038/35024044
2000HO03 J.Radioanal.Nucl.Chem. 243, 7 (2000) Glenn Theodore Seaborg: Contributions to nuclear science
doi: 10.1023/A:1006721124889
2000HO04 J.Radioanal.Nucl.Chem. 243, 13 (2000) SuperHeavy Elements
doi: 10.1023/A:1006794508959
2000HO27 Pure Appl.Chem. 72, 1525 (2000); Erratum Pure Appl.Chem. 73, 1225 (2001) Spontaneous Fission Half-Lives for Ground-State Nuclides (Technical Report) COMPILATION 208Pb, 230,232Th, 231Pa, 230,232,233,234,235,236,238U, 237Np, 236,238,239,240,241,242,244Pu, 241,242m,243Am, 240,242,243,244,245,246,248,250Cm, 249Bk, 237,238,240,242,246,248,249,250,252,254,256Cf, 253,254,254m,255Es, 242,243,244,245,246,248,250,250m,252,254,255,256,257,258,259,260Fm, 245,247,248,255,256,257,258,258m,259,260Md, 250,251,252,254,254m,256,257,258,259,260,262No, 252,253,254,255,256,257,258,259,261,262Lr, 253,254,255,256,257,258,259,260,261,262Rf, 255,256,257,258,260,261,262,262Db, 258,259,260,261,263,265,266Sg, 261,262,262mBh, 264,265,267Hs, 266Mt; compiled, evaluated spontaneous fission T1/2.
doi: 10.1351/pac200072081525
2000LA25 Phys.Rev. C61, 067603 (2000) C.A.Laue, K.E.Gregorich, R.Sudowe, J.L.Adams, M.R.Lane, D.M.Lee, C.A.McGrath, D.A.Shaughnessy, D.A.Strellis, E.R.Sylwester, P.A.Wilk, D.C.Hoffman Half-Life of 232Pu and Excitation Function for the 233U (3He, 4n)232Pu Reaction NUCLEAR REACTIONS 233U(3He, 4n), E=28-47 MeV; measured excitation function. RADIOACTIVITY 232Pu(α) [from 233U(3He, 4n)]; measured T1/2.
doi: 10.1103/PhysRevC.61.067603
2000SH10 Phys.Rev. C61, 044609 (2000) D.A.Shaughnessy, J.L.Adams, K.E.Gregorich, M.R.Lane, C.A.Laue, D.M.Lee, C.A.McGrath, J.B.Patin, D.A.Strellis, E.R.Sylwester, P.A.Wilk, D.C.Hoffman Electron-Capture Delayed Fission Properties of 242Es RADIOACTIVITY 242Es(EC), (α) [from 233U(14N, 5n)]; measured ec-delayed fission T1/2, fragment mass yields, total kinetic energies; deduced delayed fission probability.
doi: 10.1103/PhysRevC.61.044609
2000SY01 Radiochim.Acta 88, 837 (2000) E.R.Sylwester, K.E.Gregorich, D.M.Lee, B.Kadkhodayan, A.Turler, J.L.Adams, C.D.Kacher, M.R.Lane, C.A.Laue, C.A.McGrath, D.A.Shaughnessy, D.A.Strellis, P.A.Wilk, D.C.Hoffman On-line gas chromatographic studies of Rf, Zr, and Hf bromides RADIOACTIVITY 98Zr(β-);162Hf(EC); measured Eγ, Iγ. 261Rf(α); measured Eα, Iα, half-life.
2000WI15 Phys.Rev.Lett. 85, 2697 (2000) P.A.Wilk, K.E.Gregorich, A.Turler, C.A.Laue, R.Eichler, V.Ninov, J.L.Adams, U.W.Kirbach, M.R.Lane, D.M.Lee, J.B.Patin, D.A.Shaughnessy, D.A.Strellis, H.Nitsche, D.C.Hoffman Evidence for New Isotopes of Element 107: 266Bh and 267Bh NUCLEAR REACTIONS 249Bk(22Ne, 4n), (22Ne, 5n), E ≈ 117, 123 MeV; measured α spectra, αα-coin following residual nucleus decay; deduced production σ. RADIOACTIVITY 266,267Bh(α) [from 249Bk(22Ne, xn)]; measured Eα, T1/2.
doi: 10.1103/PhysRevLett.85.2697
1999LA14 Phys.Rev. C59, 3086 (1999) C.A.Laue, K.E.Gregorich, R.Sudowe, M.B.Hendricks, J.L.Adams, M.R.Lane, D.M.Lee, C.A.McGrath, D.A.Shaughnessy, D.A.Strellis, E.R.Sylwester, P.A.Wilk, D.C.Hoffman New Plutonium Isotope: 231Pu NUCLEAR REACTIONS 233U(3He, 5n), E=42-47 MeV; measured αα-coin following residual nucleus decay; deduced evidence for 231Pu. Gas transport, chemical separation. RADIOACTIVITY 231Pu(α), (EC); measured Eα, T1/2, branching ratio; deduced logft, Q(α).
doi: 10.1103/PhysRevC.59.3086
1999NI03 Phys.Rev.Lett. 83, 1104 (1999); Erratum Phys.Rev.Lett. 89, 039901 (2002); see also 2002GrZZ V.Ninov, K.E.Gregorich, W.Loveland, A.Ghiorso, D.C.Hoffman, D.M.Lee, H.Nitsche, W.J.Swiatecki, U.W.Kirbach, C.A.Laue, J.L.Adams, J.B.Patin, D.A.Shaughnessy, D.A.Strellis, P.A.Wilk Observation of Superheavy Nuclei Produced in the Reaction of 86Kr with 208Pb NUCLEAR REACTIONS 208Pb(86Kr, n), E=449 MeV; measured α-spectra, (recoil)α-, αα-coin following residual nucleus decay, production σ; deduced evidence for 293Og, 289Lv, 285Fl, 281Cn, 277Ds, 273Hs, 269Sg. Gas-filled separator. RADIOACTIVITY 293Og, 289Lv, 285Fl, 281Cn, 277Ds, 273Hs(α) [from 208Pb(86Kr, n) and subsequent α-decay]; measured Eα, T1/2.
doi: 10.1103/PhysRevLett.83.1104
1998LA30 Phys.Rev. C58, 3413 (1998) M.R.Lane, K.E.Gregorich, D.M.Lee, B.Wierczinski, C.A.McGrath, M.B.Hendricks, D.A.Shaughnessy, D.A.Strellis, E.R.Sylwester, P.A.Wilk, D.C.Hoffman Production Cross Sections of 105261Ha from the 250Cf(15N, 4n) and 243Am(22Ne, 4n) Reactions NUCLEAR REACTIONS, ICPND 250Cf(15N, 4n), E=84 MeV; 243Am(22Ne, 4n), E=116 MeV; measured α-spectra following residual decay; deduced production σ.
doi: 10.1103/PhysRevC.58.3413
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.
1997WI15 Phys.Rev. C56, 1626 (1997); Erratum Phys.Rev. C58, 1352 (1998) P.A.Wilk, K.E.Gregorich, M.B.Hendricks, M.R.Lane, D.M.Lee, C.A.McGrath, D.A.Shaughnessy, D.A.Strellis, E.R.Sylwester, D.C.Hoffman Improved Half-Life Measurement of 224Pa and Its 209Bi(18O, 3n)224Pa Production Cross Section RADIOACTIVITY 224Pa(α) [from 209Bi(18O, 3n), E=111 MeV]; measured Eα, T1/2. NUCLEAR REACTIONS, ICPND 209Bi(18O, 3n), E=111 MeV; measured Eα; deduced 224Pa production σ.
doi: 10.1103/PhysRevC.56.1626
1996KA66 Radiochim.Acta 72, 169 (1996) B.Kadkhodayan, A.Turler, K.E.Gregorich, P.A.Baisden, K.R.Czerwinski, B.Eichler, H.W.Gaggeler, T.M.Hamilton, D.T.Jost, C.D.Kacher, A.Kovacs, S.A.Kreek, M.R.Lane, M.F.Mohar, M.P.Neu, N.J.Stoyer, E.R.Sylwester, D.M.Lee, M.J.Nurmia, G.T.Seaborg, D.C.Hoffman On-line Gas Chromatographic Studies of Chlorides of Rutherfordium and Homologs Zr and Hf RADIOACTIVITY 98Zr(β-);162Hf(EC); measured Eγ, Iγ, half-lives. 261Rf(α); measured Eα, Iα, half-life.
1996LA11 Phys.Rev. C53, 2893 (1996) M.R.Lane, K.E.Gregorich, D.M.Lee, M.F.Mohar, M.Hsu, C.D.Kacher, B.Kadkhodayan, M.P.Neu, N.J.Stoyer, E.R.Sylwester, J.C.Yang, D.C.Hoffman Spontaneous Fission Properties of 104262Rf NUCLEAR REACTIONS 244Pu(22Ne, 4n), E=114 MeV; measured residual production σ. RADIOACTIVITY 262Rf(SF) [from 244Pu(22Ne, 4n), E=114 MeV]; measured T1/2, (fragment)(fragment)-coin, kinetic energies, total kinetic energy distribution; deduced mass distribution, α-decay branch upper limit.
doi: 10.1103/PhysRevC.53.2893
1995GH04 Nucl.Phys. A583, 861c (1995) A.Ghiorso, D.Lee, L.P.Somerville, W.Loveland, J.M.Nitschke, W.Ghiorso, G.T.Seaborg, P.Wilmarth, R.Leres, A.Wydler, M.Nurmia, K.Gregorich, R.Gaylord, T.Hamilton, N.J.Hannink, D.C.Hoffman, C.Jarzynski, C.Kacher, B.Kadkhodayan, S.Kreek, M.Lane, A.Lyon, M.A.McMahan, M.Neu, T.Sikkeland, W.J.Swiatecki, A.Turler, J.T.Walton, S.Yashita Evidence for the Synthesis of 267110 Produced by the 59Co + 209Bi Reaction NUCLEAR REACTIONS 209Bi(59Co, n), E ≈ 5.1 MeV/nucleon; measured Eα, production σ; deduced evidence for 267Ds.
doi: 10.1016/0375-9474(94)00775-I
1995GH05 Phys.Rev. C51, R2293 (1995) A.Ghiorso, D.Lee, L.P.Somerville, W.Loveland, J.M.Nitschke, W.Ghiorso, G.T.Seaborg, P.Wilmarth, R.Leres, A.Wydler, M.Nurmia, K.Gregorich, K.Czerwinski, R.Gaylord, T.Hamilton, N.J.Hannink, D.C.Hoffman, C.Jarzynski, C.Kacher, B.Kadkhodayan, S.Kreek, M.Lane, A.Lyon, M.A.McMahan, M.Neu, T.Sikkeland, W.J.Swiatecki, A.Turler, J.T.Walton, S.Yashita Evidence for the Possible Synthesis of Element 110 Produced by the 59Co + 209Bi Reaction NUCLEAR REACTIONS 209Bi(59Co, n), E=5.1 MeV/nucleon; measured implanted recoil Bρ, dE/dx, recoil energy; deduced 267Ds synthesis evidence, production σ.
doi: 10.1103/PhysRevC.51.R2293
1995HO27 Radiochim.Acta 70/71, 135 (1995) Spontaneous Fission RADIOACTIVITY 238,240,242Pu, 248Cm, 237,238,240,242Cf, 258mMd, 252,254No, 258,262Rf(SF); 269Ds, 272Rg, 263,265,266Sg, 264Bh, 268Mt(SF); compiled, reviewed SF-decay T1/2, total kinetic energies. 257,258,259Fm, 259,260Md, 252,254,256,258No, 259Lr, 256,258,260,262Rf; compiled, reviewed SF-decay, total kinetic energies; deduced deformed shells existence near Z=108, N=162, related features.
1994BR36 Nucl.Instrum.Methods Phys.Res. A339, 209 (1994) E.Browne, I.Ahmad, K.E.Gregorich, S.A.Kreek, D.M.Lee, D.C.Hoffman Electron-Capture Decay of 231U RADIOACTIVITY 231U(EC) [from 233U(p, 3n)231Np(EC-decay)]; measured Eγ, Iγ, I(ce), E(X-ray), I(X-ray), γγ-coin; deduced (ce)-emission probability. 231Pa levels deduced probability, γ-multipolarity, ICC.
doi: 10.1016/0168-9002(94)91806-6
1994CZ04 Radiochim.Acta 64, 23 (1994) K.R.Czerwinski, K.E.Gregorich, N.J.Hannink, C.D.Kacher, B.A.Kadkhodayan, S.A.Kreek, D.M.Lee, M.J.Nurmia, A.Turler, G.T.Seaborg, D.C.Hoffman Solution Chemistry of Element 104: Part I. Liquid-liquid extractions with triisooctylamine
1994CZ05 Radiochim.Acta 64, 29 (1994) K.R.Czerwinski, C.D.Kacher, K.E.Gregorich, T.M.Hamilton, N.J.Hannink, B.A.Kadkhodayan, S.A.Kreek, D.M.Lee, M.J.Nurmia, A.Turler, G.T.Seaborg, D.C.Hoffman Solution Chemistry of Element 104: Part II. Liquid-liquid extractions with tributylphosphate
1994GR08 Phys.Rev.Lett. 72, 1423 (1994) K.E.Gregorich, M.R.Lane, M.F.Mohar, D.M.Lee, C.D.Kacher, E.R.Sylwester, D.C.Hoffman First Confirmation of the Discovery of Element 106 NUCLEAR REACTIONS 249Cf(18O, 4n), E=95 MeV; measured Eα, Iα following residual, daughter decay; deduced production σ. RADIOACTIVITY 263Sg(α) [from 249Cf(18O, 4n), E=95 MeV]; 259Rf(α) [from 263Sg α-decay]; measured Eα, Iα, T1/2.
doi: 10.1103/PhysRevLett.72.1423
1994HO40 J.Alloys and Compounds 213/214, 67 (1994) Spontaneous fission NUCLEAR STRUCTURE Z=92-108; compiled, analyzed spontaneous fission T1/2, fragment mass distributions, related features.
doi: 10.1016/0925-8388(94)90882-6
1994KR03 Phys.Rev. C49, 1859 (1994) S.A.Kreek, H.L.Hall, K.E.Gregorich, R.A.Henderson, J.D.Leyba, K.R.Czerwinski, B.Kadkhodayan, M.P.Neu, C.D.Kacher, T.M.Hamilton, M.R.Lane, E.R.Sylwester, A.Turler, D.M.Lee, M.J.Nurmia, D.C.Hoffman Electron-Capture Delayed Fission Properties of the New Isotope 238Bk NUCLEAR REACTIONS 241Am(α, 7n), E=75 MeV; measured residue production σ. 238Bk deduced EC-delayed fission probability, T1/2. Isotope obtained by chemical separation, identification from daughter activity measurements. RADIOACTIVITY 238Bk(EC) [from 241Am(α, 7n), E=75 MeV]; measured EC-delayed fission (fragment)(X-ray)-coin, T1/2; deduced delayed fission probability.
doi: 10.1103/PhysRevC.49.1859
1994KR13 Phys.Rev. C50, 2288 (1994) S.A.Kreek, H.L.Hall, K.E.Gregorich, R.A.Henderson, J.D.Leyba, K.R.Czerwinski, B.Kadkhodayan, M.P.Neu, C.D.Kacher, T.M.Hamilton, M.R.Lane, E.R.Sylwester, A.Turler, D.M.Lee, M.J.Nurmia, D.C.Hoffman Electron-Capture Delayed Fission Properties of 228Np RADIOACTIVITY 228Np(EC), (α) [from 233U(p, 6n), E=50 MeV]; measured fission (fragment)(X-ray)-coin; deduced EC-delayed fission T1/2, fission probability, fragment mass yield distribution, EC/α-decay ratio. NUCLEAR REACTIONS, ICPND 233U(p, 6n), E=50 MeV; measured (particle)(X-ray)-coin; deduced residual production σ.
doi: 10.1103/PhysRevC.50.2288
1993HI09 Phys.Rev. C47, 2598 (1993) M.M.Hindi, B.Sur, K.L.Wedding, D.W.Bardayan, K.R.Czerwinski, M.T.F.da Cruz, D.C.Hoffman, R.-M.Larimer, K.T.Lesko, E.B.Norman β+ Decay and Cosmic-Ray Half-Life of 91Nb RADIOACTIVITY 91,91mNb(β+), (EC); measured Eγ, Iγ, E X-ray, I X-ray; deduced β-branching ratios, partial T1/2; deduced EC capture rates. Chemically purified sample source.
doi: 10.1103/PhysRevC.47.2598
1993ZI06 Radiochim.Acta 60, 11 (1993) H.P.Zimmermann, M.K.Gober, J.V.Kratz, M.Schadel, W.Bruchle, E.Schimpf, K.E.Gregorich, A.Turler, K.R.Czerwinski, N.J.Hannink, B.Kadkhodayan, D.M.Lee, M.J.Nurmia, D.C.Hoffman, H.Gaggeler, D.Jost, J.Kovacz, U.W.Scherer, A.Weber Chemical Properties of Element 105 in Aqueous Solution: Back extraction from triisooctyl amine into 0.5 M HCl NUCLEAR REACTIONS 249Bk(18O, 5n), (18O, 4n), E=99 MeV; measured Eα, Iα, SF-decay activities of residuals; deduced non-tantulum like behavior of element 105. RADIOACTIVITY 262,263Db(α), (SF) [from 249Bk(18O, 5n), (18O, 4n), E=99 MeV]; 258,259Lr(α) [from 262,263Db α-decay]; measured Eα, Iα, αα(t); deduced non-tantulum like behavior of element 105.
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 T1/2, σ.
1992GO28 Radiochim.Acta 57, 77 (1992) M.K.Gober, J.V.Kratz, H.P.Zimmermann, M.Schadel, W.Bruchle, E.Schimpf, K.E.Gregorich, A.Turler, N.J.Hannink, K.R.Czerwinski, B.Kadkhodayan, D.M.Lee, M.J.Nurmia, D.C.Hoffman, H.Gaggeler, D.Jost, J.Kovacz, U.W.Scherer, A.Weber Chemical Properties of Element 105 in Aqueous Solution: Extractions into dissobutylcarbinol NUCLEAR REACTIONS 249Bk(18O, 4n), (18O, 5n), E=99 MeV; measured Eα, Iα, residuals fission activities; deduced 262Db, 263Db element chemical properties.
1992GR02 Phys.Rev. C45, 1058 (1992) K.E.Gregorich, H.L.Hall, R.A.Henderson, J.D.Leyba, K.R.Czerwinski, S.A.Kreek, B.A.Kadkhodayan, M.J.Nurmia, D.M.Lee, D.C.Hoffman Fission Branch in 259Lr and Confirmation of 258Lr and 259Lr Mass Assignments RADIOACTIVITY 259,258Lr [from 248Cm(15N, 4n), (15N, 5n), E=93 MeV]; 255,254Fm(α) [from 255,254Md decay following 259,258Lr(α-decay)]; measured α-spectra, αα-correlations. 258Lr deduced T1/2, mass assignment. 259Lr deduced T1/2, SF-decay branch, mass assignment.
doi: 10.1103/PhysRevC.45.1058
1992HA22 Phys.Rev. C46, 1873 (1992) T.M.Hamilton, K.E.Gregorich, D.M.Lee, K.R.Czerwinski, N.J.Hannink, C.D.Kacher, B.Kadkhodayan, S.A.Kreek, M.J.Nurmia, M.R.Lane, M.P.Neu, A.Turler, D.C.Hoffman Spontaneous Fission Properties of 259Lr103 NUCLEAR REACTIONS 248Cm(15N, 4n), E=81 MeV; measured Eα, Iα. RADIOACTIVITY 259Lr(α), (SF) [from 248Cm(15N, 4n), E=81 MeV]; measured Eα, Iα, T1/2, fission fragment mass, kinetic energy distribution, SF- to α-decay ratio.
doi: 10.1103/PhysRevC.46.1873
1992KA08 Radiochim.Acta 56, 1 (1992) B.Kadkhodayan, R.A.Henderson, H.L.Hall, J.D.Leyba, K.R.Czerwinski, S.A.Kreek, N.J.Hannink, K.E.Gregorich, D.M.Lee, M.J.Nurmia, D.C.Hoffman Identification of 253Md NUCLEAR REACTIONS 243Am(13C, 3n), E=66-74 MeV; measured α-spectra, production σ; deduced evidence for 253Md. RADIOACTIVITY 253Md(α) [from 243Am(13C, 3n), E=66-74 MeV]; measured α-spectra, 252,253Fm growth curves, T1/2.
doi: 10.1524/ract.1992.56.1.1
1992KA57 Nucl.Instrum.Methods Phys.Res. A317, 254 (1992) B.Kadkhodayan, A.Turler, K.E.Gregorich, M.J.Nurmia, D.M.Lee, D.C.Hoffman The heavy element volatility instrument (HEVI)
doi: 10.1016/0168-9002(92)90616-C
1992KR01 Phys.Rev. C45, 1064 (1992) J.V.Kratz, M.K.Gober, H.P.Zimmermann, M.Schadel, W.Bruchle, E.Schimpf, K.E.Gregorich, A.Turler, N.J.Hannink, K.R.Czerwinski, B.Kadkhodayan, D.M.Lee, M.J.Nurmia, D.C.Hoffman, H.Gaggeler, D.Jost, J.Kovacz, U.W.Scherer, A.Weber New Nuclide 263Ha RADIOACTIVITY 263Db(α), (SF) [from 249Bk(18O, 4n), E=93 MeV]; measured T1/2, Eα, Iα, (α)(SF-decay fragment)-, (α, α)-correlations; deduced α/SF branching ratios. Rapid chemical separation. NUCLEAR REACTIONS 249Bk(18O, 4n), E=93 MeV; measured Eα, Iα, αα-correlations; deduced evidence for 263Db.
doi: 10.1103/PhysRevC.45.1064
1992SC30 Radiochim.Acta 57 85 (1992) M.Schadel, W.Bruchle, E.Schimpf, H.P.Zimmermann, M.K.Gober, J.V.Kratz, N.Trautmann, H.Gaggeler, D.Jost, J.Kovacs, U.W.Scherer, A.Weber, K.E.Gregorich, A.Turler, K.R.Czerwinski, N.J.Hannink, B.Kadkhodayan, D.M.Lee, M.J.Nurmia, D.C.Hoffman Chemical Properties of Element 105 in Aqueous Solution: Cation Exchange Separations with α-Hydroxyisobutyric Acid NUCLEAR REACTIONS 249Bk(18O, 5n), (18O, 4n), E=99 MeV; measured reaction products, Eα, Iα. 258,259Lr; deduced T1/2, σ.
1992TU04 Phys.Rev. C46, 1364 (1992) A.Turler, H.R.von Gunten, J.D.Leyba, D.C.Hoffman, D.M.Lee, K.E.Gregorich, D.A.Bennett, R.M.Chasteler, C.M.Gannett, H.L.Hall, R.A.Henderson, M.J.Nurmia Actinide Production from the Interactions of 40Ca and 44Ca with 248Cm and a Comparison with the 48Ca + 248Cm System NUCLEAR REACTIONS 248Cm(40Ca, X), (44Ca, X), E=231-323 MeV; measured production σ(E) for 227Th to 249Cm; deduced isotopic distribution widths.
doi: 10.1103/PhysRevC.46.1364
1991LE19 Phys.Rev. C44, 1850 (1991) J.D.Leyba, R.A.Henderson, H.L.Hall, K.R.Czerwinski, B.A.Kadkhodayan, S.A.Kreek, E.K.Brady, K.E.Gregorich, D.M.Lee, M.J.Nurmia, D.C.Hoffman Excitation Functions for Actinides Produced in the Interactions of 31P with 248Cm NUCLEAR REACTIONS, ICPND 248Cm(31P, X), E=174-239 MeV; measured σ(E) for Bk, Cf, Es, Fm isotopes production. Potential energy surface calculations comparison.
doi: 10.1103/PhysRevC.44.1850
1990HA02 Phys.Rev. C41, 618 (1990) H.L.Hall, K.E.Gregorich, R.A.Henderson, C.M.Gannett, R.B.Chadwick, J.D.Leyba, K.R.Czerwinski, B.Kadkhodayan, S.A.Kreek, D.M.Lee, M.J.Nurmia, D.C.Hoffman, C.E.A.Palmer, P.A.Baisden Electron-Capture-Delayed Fission Properties of 234Am RADIOACTIVITY 234Am(EC) [from 237Np(α, 7n), E=75 MeV]; measured EC-delayed fission T1/2, probability, (X-ray)(fragment)-correlation, (X-ray)γ-coin, Eγ, Iγ, Eα, Iα; deduced α-branching. Rotating wheel system. NUCLEAR REACTIONS 237Np(α, 7n), E=75 MeV; measured X-ray spectra; deduced residual production σ.
doi: 10.1103/PhysRevC.41.618
1990HA26 Phys.Rev. C42, 674 (1990) Y.Hatsukawa, H.Nakahara, D.C.Hoffman Systematics of Alpha Decay Half-Lives RADIOACTIVITY N=82-156; analyzed α-decay T1/2, favored transitions; deduced transactinides, superheavy elements α-decay T1/2. Semi-empirical formula, correction factor for closed shell.
doi: 10.1103/PhysRevC.42.674
1990HA28 Phys.Rev. C42, 1480 (1990) H.L.Hall, K.E.Gregorich, R.A.Henderson, C.M.Gannett, R.B.Chadwick, J.D.Leyba, K.R.Czerwinski, B.Kadkhodayan, S.A.Kreek, N.J.Hannink, D.M.Lee, M.J.Nurmia, D.C.Hoffman, C.E.A.Palmer, P.A.Baisden Electron-Capture-Delayed Fission Properties of 232Am RADIOACTIVITY 232Am(EC) [from 237Np(α, 9n), E=99 MeV]; measured EC-delayed fission T1/2, (fragment)(X-ray)-, (fragment)γ-coin; deduced delayed-fission probability. Multiple 237Np targets, rotating wheel system. NUCLEAR REACTIONS, ICPND 237Np(α, 9n), E=99 MeV; measured (particle)(X-ray)-, (particle)(γ)-coin following residue fission; deduced residue production σ.
doi: 10.1103/PhysRevC.42.1480
1990HO03 Phys.Rev. C41, 631 (1990) D.C.Hoffman, D.M.Lee, K.E.Gregorich, M.J.Nurmia, R.B.Chadwick, K.B.Chen, K.R.Czerwinski, C.M.Gannett, H.L.Hall, R.A.Henderson, B.Kadkhodayan, S.A.Kreek, J.D.Leyba Spontaneous Fission Properties of 2.9-s 256No RADIOACTIVITY 256No(α), (SF) [from 248Cm(12C, X), E=71 MeV]; measured T1/2, Eα, Qα, α/SF ratio, (fragment)(fragment) kinetic energies, total kinetic energy distribution; deduced fragment mass distributions. NUCLEAR REACTIONS, ICPND 248Cm(12C, 4n), E=71 MeV; measured Eα, Iα; deduced residual production σ.
doi: 10.1103/PhysRevC.41.631
1990LE09 Phys.Rev. C41, 2092 (1990) J.D.Leyba, R.A.Henderson, H.L.Hall, C.M.Gannett, R.B.Chadwick, K.R.Czerwinski, B.A.Kadkhodayan, S.A.Kreek, G.R.Haynes, K.E.Gregorich, D.M.Lee, M.J.Nurmia, D.C.Hoffman Heavy Actinide Production from the Interactions of 40Ar with 248Cm and a Comparison with the 44Ca-248Cm System NUCLEAR REACTIONS, ICPND 248Cm(40Ar, X), E=207, 225, 245, 266, 286 MeV; measured σ(E) for production of Bk, Cf, Es, Fm Isotopes. Radiochemical separations.
doi: 10.1103/PhysRevC.41.2092
1989BR24 Nucl.Phys. A501, 477 (1989) E.Browne, B.Sur, E.B.Norman, H.L.Hall, R.A.Henderson, K.T.Lesko, R.M.Larimer, D.C.Hoffman Nuclear Penetration Effects in 233U RADIOACTIVITY 233Pa(β-) [from 237Np(α decay)]; measured Eγ, Iγ, I(ce), Iβ. 233U deduced transitions ICC, nuclear penetration parameter λ.
doi: 10.1016/0375-9474(89)90142-5
1989HA10 Phys.Rev. C39, 1866 (1989) H.L.Hall, K.E.Gregorich, R.A.Henderson, D.M.Lee, D.C.Hoffman, M.E.Bunker, M.M.Fowler, P.Lysaight, J.W.Starner, J.B.Wilhelmy β-Delayed Fission from 256mEs and the Level Scheme of 256Fm RADIOACTIVITY 256mEs(β-) [from 254Es(t, p), E=16 MeV]; measured Eγ, Iγ, βγ-, γγ-coin, β(fragment)(θ) following β-delayed fission; deduced β-delayed fission evidence. 256Fm deduced isomer, T1/2, fission characteristics, other levels, J, π.
doi: 10.1103/PhysRevC.39.1866
1989HA27 Nucl.Phys. A500, 90 (1989) Y.Hatsukawa, T.Ohtsuki, K.Sueki, H.Nakahara, I.Kohno, M.Magara, N.Shinohara, H.L.Hall, R.A.Henderson, C.M.Gannett, J.A.Leyba, R.B.Chadwick, K.E.Gregorich, D.Lee, M.J.Nurmia, D.C.Hoffman Alpha Decay Properties of Light Einsteinium Isotopes RADIOACTIVITY 249,248,247,246,245,243Es(α) [from 249Cf(p, xn), 238U(14N, xn), 237Np(12C, xn), 233U(14N, xn)]; measured T1/2, Eα, Iα. 245,243,241,239Bk deduced levels, J, π, moment of inertia. Calculated α transition probability.
doi: 10.1016/0375-9474(89)90131-0
1989HO22 Nucl.Phys. A502, 21c (1989) Spontaneous Fission Properties and Lifetime Systematics NUCLEAR STRUCTURE A=230-260; analyzed SF T1/2, other fission properties.
doi: 10.1016/0375-9474(89)90652-0
1989KO03 Phys.Rev. C39, 687 (1989) E.A.Koop, G.Feige, L.Schmidt, H.Jungclas, R.Brandt, G.Ingold, D.C.Hoffman Direct Measurements of Neutron Emission in Complete and Incomplete 12C-Induced Fusion Reactions NUCLEAR REACTIONS 197Au, 209Bi, 232Th, 238U(12C, X), (12C, F), E=120 MeV; measured neutron multiplicity following incomplete fusion, fission; deduced average neutron multiplicity, fission mechanism.
doi: 10.1103/PhysRevC.39.687
1989KR17 Radiochim.Acta 48, 121 (1989) J.V.Kratz, H.P.Zimmermann, U.W.Scherer, M.Schadel, W.Bruchle, K.E.Gregorich, C.M.Gannett, H.L.Hall, R.A.Henderson, D.M.Lee, J.D.Leyba, M.J.Nurmia, D.C.Hoffman, H.Gaggeler, D.Jost, U.Baltensperger, N.-Q.Ya, A.Turler, Ch.Lienert Chemical Properties of Element 105 in Aqueous Solution: Halide complex formation and anion exchange into triisoctyl amine NUCLEAR REACTIONS 249Bk(18O, 5n), E=114 MeV; measured Eα, Iα; deduced residual nucleus production.
1988AL26 Phys.Rev. C38, 1658 (1988), Erratum Phys. Rev. C44, 566 (1991) K.Aleklett, R.Brandt, G.Dersch, G.Feige, E.M.Friedlander, E.Ganssauge, G.Haase, D.C.Hoffman, J.Herrmann, B.Judek, W.Loveland, P.L.McGaughey, N.T.Porile, W.Shulz, G.T.Seaborg Unusual Behavior of Projectile Fragments Produced by the Interactions of Relativistic Ar Ions with Copper NUCLEAR REACTIONS Cu(40Ar, X), E=0.9, 1.8 GeV/nucleon; measured reaction products, Eγ, Iγ; deduced target fragment production σ, projectile fragment secondary interaction properties.
doi: 10.1103/PhysRevC.38.1658
1988BR41 Inorganica chimica acta 146, 267 (1988) W.Bruchle, M.Schadel, U.W.Scherer, J.V.Kratz, K.E.Gregorich, D.Lee, M.Nurmia, R.M.Chasteler, H.L.Hall, R.A.Henderson, D.C.Hoffman The Hydration Enthalpies of Md3+ and Lr3+ NUCLEAR REACTIONS 249Bk(18O, X)260Lr, E=117 MeV; measured reaction products, Eα, Iα; deduced yields, extraction procedures.
doi: 10.1016/s0020-1693(00)80619-2
1988GR30 Radiochim.Acta 43, 223 (1988) K.E.Gregorich, R.A.Henderson, D.M.Lee, M.J.Nurmia, R.M.Chasteler, H.L.Hall, D.A.Bennett, C.M.Gannett, R.B.Chadwick, J.D.Leyba, D.C.Hoffman, G.Herrmann Aqueous Chemistry of Element 105 NUCLEAR REACTIONS 249Bk(18O, 5n), E=117 MeV; measured α-spectra following residual decay; deduced 262Db fission branch, fission, α-activity production σ. RADIOACTIVITY 262Db(α), (SF) [from 249Bk(18O, 5n), E=117 MeV]; 258Lr [from 262Db decay]; measured Eα, Iα, αα(t). 262Db deduced fission branch.
1988HO19 J.Radioanal.Nucl.Chem. 124, 135 (1988) D.C.Hoffman, R.A.Henderson, K.E.Gregorich, D.A.Bennett, R.M.Chasteler, C.M.Gannett, H.L.Hall, D.M.Lee, M.J.Nurmia, S.Cai, R.Agarwal, A.W.Charlop, Y.Y.Chu, G.T.Seaborg, R.J.Silva Atom-at-a-time radiochemical separations of the heaviest elements: Lawrencium chemistry NUCLEAR REACTIONS 249Bk(18O, 3nα), E=101 MeV; measured reaction products, Eα, Iα. 260Lr; deduced σ, T1/2.
doi: 10.1007/bf02035512
1988JO08 Inorganica chimica acta 146, 255 (1988) D.T.Jost, H.W.Gaggeler, C.H.Vogel, M.Schadel, E.Jager, B.Eichler, K.E.Gregorich, D.C.Hoffman Search for lawrencium as a p-element using gas chromatography techniques NUCLEAR REACTIONS 249Bk(18O, X)252Fm/254Fm/250Fm/260Lr/211Bi/249Cf/210FR/211Fr, E=101 MeV; measured reaction products using gaschromatography, Eα, Iα. 260Lr; deduced σ, T1/2.
doi: 10.1016/S0020-1693(00)80617-9
1988SC24 Inorganica chimica acta 146, 249 (1988) U.W.Scherer, J.V.Kratz, M.Schadel, W.Bruchle, K.E.Gregorich, R.A.Henderson, D.Lee, M.Nurmia, D.C.Hoffman Lawrencium chemistry: no evidence for oxidation states lower than 3+ in aqueous solution NUCLEAR REACTIONS 249Bk(18O, X)249Cf/211Bi/252Fm/254Fm/255Fm/249Fm/254Md/255Md/260Lr, E=100-101 MeV; measured reaction products, Eα, Iα. 260Lr; deduced yields.
doi: 10.1016/S0020-1693(00)80616-7
1987CH30 Phys.Rev. C36, 1820 (1987) R.M.Chasteler, R.A.Henderson, D.Lee, K.E.Gregorich, M.J.Nurmia, R.B.Welch, D.C.Hoffman Excitation Functions for Production of Heavy Actinides from Interactions of 16O with 249Cf NUCLEAR REACTIONS, ICPND 249Cf(16O, X)244Bk/245Bk/246Bk/248Bk/248mBk/247Cf/248Cf/248Es/249Es/250Es/251Es/253Es/250Fm/251Fm/252Fm/253Fm/254Fm/256Fm, E=90, 96, 106, 115, 122, 139, 150 MeV; measured residual production σ(E), isotopic distributions.
doi: 10.1103/PhysRevC.36.1820
1987HY02 Radiochim.Acta 42, 57 (1987) E.K.Hyde, D.C.Hoffman, O.L.Keller A History and Analysis of the Discovery of Elements 104 and 105 COMPILATION 253,254,255,256,257,258,259,260,262,262Rf, 255,257,258,260,261,262Db; compiled first identification (or discovery) of isotopes.
doi: 10.1524/ract.1987.42.2.57
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
1986HO21 Nucl.Instrum.Methods Phys.Res. A249, 13 (1986) Transuranium Isotopes NUCLEAR REACTIONS 252Cf(n, X)254Es, E=thermal; 248Cm(48Ca, X)253Es/252Es/252Fm/254Fm/254mFm/255Fm/256Fm, E=230-310 MeV; analyzed residuals production σ(E); deduced chemical, nuclear properties.
doi: 10.1016/0168-9002(86)90236-6
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
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
1984BR14 Phys.Rev. C30, 559 (1984) H.C.Britt, D.C.Hoffman, J.van der Plicht, J.B.Wilhelmy, E.Cheifetz, R.J.Dupzyk, R.W.Lougheed Fission of 255,256Es, 255-257Fm, and 258Md at Moderate Excitation Energies NUCLEAR REACTIONS, ICPND 254Es(d, pF), (t, pF), (3He, dF), (3He, pF), E=tandem; 254Es(p, F), (d, F), (t, F), E=11-17 MeV; 254Es(α, F), E=20-26 MeV; measured fission fragment yield, total kinetic energy vs mass, (fragment)(fragment)-coin. 255,256Es, 255,256,257Fm, 258Md deduced fission characteristics, potential energy surface role.
doi: 10.1103/PhysRevC.30.559
1983LE09 Phys.Rev. C27, 2656 (1983) D.Lee, K.J.Moody, M.J.Nurmia, G.T.Seaborg, H.R.von Gunten, D.C.Hoffman Excitation Functions for Production of Heavy Actinides from Interactions of 18O with 248Cm and 249Cf NUCLEAR REACTIONS, ICPND 248Cm(18O, X)245Bk/246Bk/248Bk/248mBk/250Bk/251Bk/246Cf/248Cf/250Cf/252Cf/253Cf/254Cf/252Es/253Es/254Es/254mEs/255Es/252Fm/253Fm/254Fm/255Fm/256Fm, E=97, 104, 113, 122 MeV; 249Cf(18O, X)245Bk/246Bk/248Bk/248mBk/246Cf/248Cf/250Cf/249Es/250Es/251Es/252Es/253Es/254Es/254mEs/250Fm/252Fm/253Fm/254Fm/255Fm/256Fm/256Md/258Md/258mMd/259No, E=91, 97, 104, 113, 122, 150 MeV; measured residuals production σ(E), mass distribution widths. Activation technique.
doi: 10.1103/PhysRevC.27.2656
1982LE01 Phys.Rev. C25, 286 (1982) D.Lee, H.von Gunten, B.Jacak, M.Nurmia, Yuan-fang Liu, Cheng Luo, G.T.Seaborg, D.C.Hoffman Production of Heavy Actinides from Interactions of 16O, 18O, 20Ne, and 22Ne with 248Cm NUCLEAR REACTIONS 248Cm(16O, X), E=98 MeV; 248Cm(18O, X), E=97 MeV; 248Cm(20Ne, X), E=115 MeV; 248Cm(22Ne, X), E=116 MeV; measured production σ for 245,246,248m,250,251Bk, 246,248,249,250,251,252,253,254Cf, 251,252,253,254m,255Es, 251,252,253,254,255,256Fm, 256Md, 259No; deduced reaction mechanism. Activation technique, radiochemical separation.
doi: 10.1103/PhysRevC.25.286
1981HO32 Phys.Rev. C 24, 495 (1981) D.C.Hoffman, D.Lee, A.Ghiorso, M.J.Nurmia, K.Aleklett, M.Leino Fission properties of the 1.5-s spontaneous fission activity produced in bombardment of 248Cm with 18O RADIOACTIVITY 259Fm(SF) [from 248Cm(18O, X), E=95 MeV]; measured fission fragments. 258,259Fm, 260Md; deduced T1/2, total kinetic energy, uncertainty with the activity parent nuclide assignment, the most likely assignment is 259Fm.
doi: 10.1103/PhysRevC.24.495
1980BR02 Phys.Rev. C21, 761 (1980) H.C.Britt, E.Cheifetz, D.C.Hoffman, J.B.Wilhelmy, R.J.Dupzyk, R.W.Lougheed Fission Barriers for 255Es, 256Es, and 255Fm NUCLEAR REACTIONS 254Es(t, pF), (d, pF), (3He, dF), E not given; measured fission coin spectra. 255Fm, 255,256Es deduced first barrier height.
doi: 10.1103/PhysRevC.21.761
1980HO01 Phys.Rev. C21, 637 (1980) D.C.Hoffman, G.P.Ford, J.P.Balagna, L.R.Veeser Neutron Multiplicity Measurements of Cf and Fm Isotopes RADIOACTIVITY 250,252,254Cf (SF), 256,257Fm (SF); measured (fragment)n-coin; deduced neutron-multiplicity vs total kinetic energy, fragment-mass ratio.
doi: 10.1103/PhysRevC.21.637
1980HO04 Phys.Rev. C21, 972 (1980) D.C.Hoffman, J.B.Wilhelmy, J.Weber, W.R.Daniels, E.K.Hulet, R.W.Lougheed, J.H.Landrum, J.F.Wild, R.J.Dupzyk 12.3-min 256Cf and 43-min 258Md and Systematics of the Spontaneous Fission Properties of Heavy Nuclides RADIOACTIVITY 256Cf(SF) [from 254Cf(t, p), E=16 MeV]; measured T1/2, (fragment)(fragment)-coin; deduced total kinetic energy, mass distribution. 258Md[from 255Es(α, n), E=26.3 MeV]; measured T1/2. 258Fm (SF) [from ϵ decay of 258Md]; measured (fragment)(fragment)-coin; deduced total kinetic energy, mass distribution.
doi: 10.1103/PhysRevC.21.972
1980HU03 Phys.Rev. C21, 966 (1980) E.K.Hulet, R.W.Lougheed, J.H.Landrum, J.F.Wild, D.C.Hoffman, J.Weber, J.B.Wilhelmy Spontaneous Fission of 259Fm NUCLEAR REACTIONS 257Fm(t, p), E=16 MeV; measured σ, (fragment)(fragment)-coin. 259Fm deduced SF isomer, T1/2, fragment mass distribution.
doi: 10.1103/PhysRevC.21.966
1978WI12 S.Afr.J.Phys. 1, 116 (1978) J.B.Wilhelmy, H.C.Britt, D.C.Hoffman, W.R.Daniels, E.Cheifetz, A.Gavron, J.Weber, E.K.Hulet, J.H.Landrum, R.W.Lougheed, J.F.Wild Fission Properties of the Heavy Actinides NUCLEAR REACTIONS 254Es(d, pF), (t, pF), E not given; measured fission barriers. RADIOACTIVITY, Fission 256Cf(SF) [from 254Cf(t, p)]; 258Fm(SF) [from 255Es(α, n)258Md+electron capture]; 259Fm(SF) [from 257Fm(t, p)]; measured fragment mass distribution, average kinetic energy release.
1975HO18 J.Inorg.Nucl.Chem. 37, 2336 (1975) D.C.Hoffman, J.W.Barnes, B.J.Dropesky, F.O.Lawrence, G.M.Kelley, M.A.Ott Half-Lives of 129mXe, 131mXe, 133mXe, 133gXe and 135gXe RADIOACTIVITY 129m,131m,133m,133,135Xe; measured T1/2.
doi: 10.1016/0022-1902(75)80745-7
1974DA01 J.Inorg.Nucl.Chem. 36, 201 (1974) W.R.Daniels, G.P.Ford, D.C.Hoffman, K.Wolfsberg Branching Ratio for the Decay of 135I to the Isomers of 135Xe RADIOACTIVITY 135I; measured Eγ, Iγ. 135Xe levels deduced γ-branching.
doi: 10.1016/0022-1902(74)80684-6
1973HO02 Phys.Rev. C7, 276 (1973) D.C.Hoffman, G.P.Ford, J.P.Balagna Kinetic Energy Distributions in the Spontaneous Fission of 250Cm and 250Cf RADIOACTIVITY, Fission 250Cf, 250Cm(SF); measured fragment kinetic energy distributions.
doi: 10.1103/PhysRevC.7.276
1973OR03 Phys.Rev. C8, 718 (1973) C.J.Orth, W.R.Daniels, D.C.Hoffman, F.O.Lawrence Decay of 178Yb and the Isomers of 178Lu RADIOACTIVITY 178Yb [from 176Yb(t, p)]; measured T1/2, Eβ, Eγ, Iγ, βγ- coin; deduced log ft, Q. 178Lu deduced levels, J, π. 178gLu [from 178Yb β decay]; measured T1/2, Eβ, Eγ, Iγ, γγ- coin; deduced log ft, Q. 178mLu [from 176Yb(t, n)]; measured T1/2, Eγ, Iγ. 178Hf deduced levels, J, π. Ge(Li) detectors, enriched target, Et=12 MeV.
doi: 10.1103/PhysRevC.8.718
1973VE10 Trans.Amer.Nucl.Soc. 16, 315 (1973) L.R.Veeser, J.B.Wilhelmy, D.C.Hoffman, A.Hemmendinger, G.P.Ford, J.A.Farrell, J.P.Balagna Prompt Neutrons Emitted in Spontaneous Fission of 257Fm RADIOACTIVITY, Fission 252Cf, 257Fm(SF); measured prompt neutrons. Data from this article have been entered in the EXFOR database. For more information, access X4 dataset10300. 1971BA03 Phys.Rev.Lett. 26, 145 (1971) J.P.Balagna, G.P.Ford, D.C.Hoffman, J.D.Knight Mass Symmetry in the Spontaneous Fission of 257Fm RADIOACTIVITY, Fission 257Fm(SF); measured fragment mass, kinetic energy distributions.
doi: 10.1103/PhysRevLett.26.145
1971DA19 Phys.Rev. C4, 919 (1971) Decay of 152Nd and the Isomers of 152Pm RADIOACTIVITY 152Nd, 152Pm; measured T1/2, Eγ, Iγ, Iβ, βγ-, γγ-coin; deduced log ft. 152Pm deduced Q. 152Pm, 152Sm deduced levels, J, π, γ-branching.
doi: 10.1103/PhysRevC.4.919
1969HO10 Nucl.Phys. A131, 551 (1969) D.C.Hoffman, F.O.Lawrence, W.R.Daniels Decay of 243Pu RADIOACTIVITY 243Pu [from 242Pu(n, γ)]; measured T1/2, Eγ, Iγ, I(ce), Eβ, Iβ, βγ-coin. 243Am deduced levels, log ft, J, π, Qβ. Ge(Li), Si(Li) detectors. Enriched target.
doi: 10.1016/0375-9474(69)90594-6
1968DA02 Nucl.Phys. A107, 569 (1968) W.R.Daniels, D.C.Hoffman, F.O.Lawrence, C.J.Orth Decay of 245Pu RADIOACTIVITY 245Pu [from 244Pu(n, γ)]; measured T1/2, Eγ, Iγ, I(ce) Eβ, Iβ, βγ-, γγ-coin. 245Am; measured T1/2. 245Am deduced levels, log ft, J, π Qβ. Ge(Li), Si(Li) detectors. Enriched target.
doi: 10.1016/0375-9474(68)90784-7
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