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Search: Author = R.W.Lougheed

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2007ST18      Nucl.Phys. A787, 388c (2007)

N.J.Stoyer, J.H.Landrum, P.A.Wilk, K.J.Moody, J.M.Kenneally, D.A.Shaughnessy, M.A.Stoyer, J.F.Wild, R.W.Lougheed, S.N.Dmitriev, Yu.Ts.Oganessian, S.V.Shishkin, N.V.Aksenov, E.E.Tereshatov, G.A.Bozhikov, G.K.Vostokin, V.K.Utyonkov, A.A.Yeremin

Chemical Identification of a Long-Lived Isotope of Dubnium, a Descendant of Element 115

NUCLEAR REACTIONS 238U(48Ca, 3n), E=247 MeV; measured super heavy element yield, Eα, Iα; analyzed production σ. Detailed chemical analysis procedure given.

NUCLEAR STRUCTURE 268Db, 272Bh, 276Mt, 280Rg, 284Nh, 288Mc; analyzed superheavy element production and decay data.

RADIOACTIVITY 268Db(SF); 272Bh, 276Mt, 280Rg, 284Nh, 288Mc(α); measured Eα, E(fragment), T1/2.

doi: 10.1016/j.nuclphysa.2006.12.060
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2006OG05      Phys.Rev. C 74, 044602 (2006)

Yu.Ts.Oganessian, V.K.Utyonkov, Yu.V.Lobanov, F.Sh.Abdullin, A.N.Polyakov, R.N.Sagaidak, I.V.Shirokovsky, Yu.S.Tsyganov, A.A.Voinov, G.G.Gulbekian, S.L.Bogomolov, B.N.Gikal, A.N.Mezentsev, S.Iliev, V.G.Subbotin, A.M.Sukhov, K.Subotic, V.I.Zagrebaev, G.K.Vostokin, M.G.Itkis, K.J.Moody, J.B.Patin, D.A.Shaughnessy, M.A.Stoyer, N.J.Stoyer, P.A.Wilk, J.M.Kenneally, J.H.Landrum, J.F.Wild, R.W.Lougheed

Synthesis of the isotopes of elements 118 and 116 in the 249Cf and 245Cm + 48Ca fusion reactions

NUCLEAR REACTIONS 245Cm(48Ca, 2n), (48Ca, 3n), E=249, 255 MeV; 249Cf(48Ca, 3n), E=251 MeV; measured Eα, αα-coin, fission fragment spectra following residual nucleus decay; deduced σ.

RADIOACTIVITY 294Og, 290,291Lv, 286,287Fl, 283Cn, 279Ds, 275Hs, 271Sg(α) [from 245Cm, 249Cf(48Ca, xn) and subsequent decay]; measured Eα, T1/2. 282Cn, 267Rf(SF) [from α-decay of 286Rf and 271Sg]; measured fission fragment spectra, T1/2.

doi: 10.1103/PhysRevC.74.044602
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2005AH03      Phys.Rev. C 71, 054305 (2005)

I.Ahmad, F.G.Kondev, E.F.Moore, M.P.Carpenter, R.R.Chasman, J.P.Greene, R.V.F.Janssens, T.Lauritsen, C.J.Lister, D.Seweryniak, R.W.Hoff, J.E.Evans, R.W.Lougheed, C.E.Porter, L.K.Felker

Energy levels of 249Bk populated in the α decay of 25399Es and β- decay of 24996Cm

RADIOACTIVITY 253Es(α); measured Eα, Eγ, γγ-, αγ-coin. 249Cm(β-) [from 248Cm(n, γ)]; measured Eγ, Iγ. 249Bk deduced levels, J, π, configurations, B(λ), g factors. 253Es(SF); measured Eγ, Iγ from fission fragment decay; deduced fission branching ratio. Gammasphere array, comparisons with model predictions.

doi: 10.1103/PhysRevC.71.054305
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2005OG02      Phys.Rev. C 72, 034611 (2005)

Yu.Ts.Oganessian, V.K.Utyonkov, S.N.Dmitriev, Yu.V.Lobanov, M.G.Itkis, A.N.Polyakov, Yu.S.Tsyganov, A.N.Mezentsev, A.V.Yeremin, A.A.Voinov, E.A.Sokol, G.G.Gulbekian, S.L.Bogomolov, S.Iliev, V.G.Subbotin, A.M.Sukhov, G.V.Buklanov, S.V.Shishkin, V.I.Chepigin, G.K.Vostokin, N.V.Aksenov, M.Hussonnois, K.Subotic, V.I.Zagrebaev, K.J.Moody, J.B.Patin, J.F.Wild, M.A.Stoyer, N.J.Stoyer, D.A.Shaughnessy, J.M.Kenneally, P.A.Wilk, R.W.Lougheed, H.W.Gaggeler, D.Schumann, H.Bruchertseifer, R.Eichler

Synthesis of elements 115 and 113 in the reaction 243Am + 48Ca

NUCLEAR REACTIONS 243Am(48Ca, 3n), (48Ca, 4n), E=248, 253 MeV; measured delayed Eα, αα-coin; deduced σ.

RADIOACTIVITY 287,288Mc, 283,284Nh, 279,280Rg, 275,276Mt, 272Bh(α) [from 243Am(48Ca, xn) and subsequent decay]; measured Eα, T1/2; deduced Qα. 267,268Db(SF); measured T1/2.

doi: 10.1103/PhysRevC.72.034611
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2005OG03      Eur.Phys.J. A 25, Supplement 1, 589 (2005)

Yu.Ts.Oganessian, V.K.Utyonkov, Yu.V.Lobanov, F.Sh.Abdullin, A.N.Polyakov, I.V.Shirokovsky, Yu.S.Tsyganov, G.G.Gulbekian, S.L.Bogomolov, B.N.Gikal, A.N.Mezentsev, S.Iliev, V.G.Subbotin, A.M.Sukhov, A.A.Voinov, G.V.Buklanov, K.Subotic, V.I.Zagrebaev, M.G.Itkis, J.B.Patin, K.J.Moody, J.F.Wild, M.A.Stoyer, N.J.Stoyer, D.A.Shaughnessy, J.M.Kenneally, P.A.Wilk, R.W.Lougheed

New elements from Dubna

NUCLEAR REACTIONS 238U(48Ca, 3n), (48Ca, 4n), 233U, 242Pu(48Ca, 2n), (48Ca, 3n), (48Ca, 4n), E ≈ 230-250 MeV; measured σ.

RADIOACTIVITY 294Og, 290,291,292,293Lv, 287,288,289Fl, 285Cn, 275Hs(α); 286Fl, 283Cn, 279Ds, 271Sg(α), (SF);282,284Cn, 281Ds, 267Rf(SF); measured Eα, T1/2, branching ratios.

doi: 10.1140/epjad/i2005-06-134-9
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2004OG03      Phys.Rev. C 69, 021601 (2004); Erratum Phys.Rev. C 69, 029902 (2004)

Yu.Ts.Oganessian, V.K.Utyonkov, Yu.V.Lobanov, F.Sh.Abdullin, A.N.Polyakov, I.V.Shirokovsky, Yu.S.Tsyganov, G.G.Gulbekian, S.L.Bogomolov, A.N.Mezentsev, S.Iliev, V.G.Subbotin, A.M.Sukhov, A.A.Voinov, G.V.Buklanov, K.Subotic, V.I.Zagrebaev, M.G.Itkis, J.B.Patin, K.J.Moody, J.F.Wild, M.A.Stoyer, N.J.Stoyer, D.A.Shaughnessy, J.M.Kenneally, R.W.Lougheed

Experiments on the synthesis of element 115 in the reaction 243Am(48Ca, xn)291-x115

NUCLEAR REACTIONS 243Am(48Ca, 3n), (48Ca, 4n), E=253 MeV; measured (recoil)α-, αα-coin following residual nucleus decay; deduced production σ.

RADIOACTIVITY 287,288Mc, 283,284Nh, 279,280Rg, 275,276Mt, 272Bh(α) [from 243Am(48Ca, xn) and subsequent decay]; measured Eα, T1/2; deduced Qα. 267,268Db(SF) [from 243Am(48Ca, xn) and subsequent decay]; measured T1/2. Comparison with model predictions.

doi: 10.1103/PhysRevC.69.021601
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2004OG05      Nucl.Phys. A734, 109 (2004)

Yu.Ts.Oganessian, V.K.Utyonkov, Yu.V.Lobanov, F.Sh.Abdullin, A.N.Polyakov, I.V.Shirokovsky, Yu.S.Tsyganov, G.G.Gulbekian, S.L.Bogomolov, B.N.Gikal, A.N.Mezentsev, S.Iliev, V.G.Subbotin, A.M.Sukhov, A.A.Voinov, G.V.Buklanov, K.Subotic, V.I.Zagrebaev, M.G.Itkis, J.B.Patin, K.J.Moody, J.F.Wild, M.A.Stoyer, N.J.Stoyer, D.A.Shaughnessy, J.M.Kenneally, R.W.Lougheed

Heavy Element Research at Dubna

NUCLEAR REACTIONS 245Cm(48Ca, xn), E*=33 MeV; measured Eα, αα-, (fission fragment)α-coin following residual nucleus decay; deduced evidence for 290,291Lv. 244Pu(48Ca, xn), E*=31-53 MeV; measured evaporation residue excitation functions. Studies of other reactions and nuclides reviewed.

doi: 10.1016/j.nuclphysa.2004.01.020
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2004OG07      Phys.Rev. C 69, 054607 (2004)

Yu.Ts.Oganessian, V.K.Utyonkov, Yu.V.Lobanov, F.Sh.Abdullin, A.N.Polyakov, I.V.Shirokovsky, Yu.S.Tsyganov, G.G.Gulbekian, S.L.Bogomolov, B.N.Gikal, A.N.Mezentsev, S.Iliev, V.G.Subbotin, A.M.Sukhov, A.A.Voinov, G.V.Buklanov, K.Subotic, V.I.Zagrebaev, M.G.Itkis, J.B.Patin, K.J.Moody, J.F.Wild, M.A.Stoyer, N.J.Stoyer, D.A.Shaughnessy, J.M.Kenneally, R.W.Lougheed

Measurements of cross sections for the fusion-evaporation reactions 244Pu(48Ca, xn)292-x114 and 245Cm(48Ca, xn)293-x116

NUCLEAR REACTIONS 244Pu(48Ca, 3n), (48Ca, 4n), (48Ca, 5n), E=243-257 MeV; 245Cm(48Ca, 2n), (48Ca, 3n), E=243 MeV; measured production σ.

RADIOACTIVITY 290,291Lv, 286,287,288,289Fl, 283,285Cn(α) [from 244Pu, 245Cm(48Ca, xn) and subsequent decay]; measured Eα, T1/2. 282,284Cn, 279,281Ds(SF); measured fission energy, T1/2.

doi: 10.1103/PhysRevC.69.054607
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2004OG10      Prog.Theor.Phys.(Kyoto), Suppl. 154, 406 (2004)

Yu.Ts.Oganessian, V.K.Utyonkov, Yu.V.Lobanov, F.Sh.Abdullin, A.N.Polyakov, I.V.Shirokovsky, Yu.S.Tsyganov, G.G.Gulbekian, S.L.Bogomolov, B.N.Gikal, A.N.Mezentsev, S.Iliev, V.G.Subbotin, A.M.Sukhov, A.A.Voinov, G.V.Buklanov, K.Subotic, V.I.Zagrebaev, M.G.Itkis, K.J.Moody, J.F.Wild, M.A.Stoyer, N.J.Stoyer, D.A.Shaughnessy, J.M.Kenneally, J.B.Patin, R.W.Lougheed

Synthesis of Superheavy Nuclei in 48Ca-Induced Reactions

NUCLEAR REACTIONS 244Pu(48Ca, 3n), (48Ca, 4n), (48Ca, 5n), E* ≈ 30-55 MeV; measured excitation functions.

RADIOACTIVITY 290,291Lv, 287,288Mc, 286,287,288,289Fl, 283,284Nh, 283,285Cn, 279,280Rg, 275,276Mt, 272Bh(α); 286Fl, 282,284Cn, 279,281Ds(SF); 294Og(α), (SF); measured Eα, T1/2.

doi: 10.1143/PTPS.154.406
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2004OG12      Phys.Rev. C 70, 064609 (2004); Erratum Phys.Rev. C 71, 029902 (2005)

Yu.Ts.Oganessian, V.K.Utyonkov, Yu.V.Lobanov, F.Sh.Abdullin, A.N.Polyakov, I.V.Shirokovsky, Yu.S.Tsyganov, G.G.Gulbekian, S.L.Bogomolov, B.N.Gikal, A.N.Mezentsev, S.Iliev, V.G.Subbotin, A.M.Sukhov, A.A.Voinov, G.V.Buklanov, K.Subotic, V.I.Zagrebaev, M.G.Itkis, J.B.Patin, K.J.Moody, J.F.Wild, M.A.Stoyer, N.J.Stoyer, D.A.Shaughnessy, J.M.Kenneally, P.A.Wilk, R.W.Lougheed, R.I.Ilkaev, S.P.Vesnovskii

Measurements of cross sections and decay properties of the isotopes of elements 112, 114, and 116 produced in the fusion reactions 233, 238U, 242Pu, and 248Cm + 48Ca

NUCLEAR REACTIONS 233,238U, 242Pu, 248Cm(48Ca, 2n), (48Ca, 3n), (48Ca, 4n), (48Ca, 5n), E* ≈ 25-55 MeV; measured excitation functions. Comparison with model predictions.

RADIOACTIVITY 271Sg, 275Hs, 279Ds, 282,283,285Cn, 286,287,288,289Fl, 292,293Lv(α); 267Rf, 271Sg, 279,281Ds, 284Cn, 286Fl(SF) [from 233,238U, 242Pu, 248Cm(48Ca, xn) and subsequent decay]; measured Eα, T1/2. Comparison with model predictions.

doi: 10.1103/PhysRevC.70.064609
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2004SH21      Nucl.Phys. A734, E5 (2004)

D.A.Shaughnessy, K.J.Moody, J.M.Kenneally, J.F.Wild, M.A.Stoyer, R.W.Lougheed, A.V.Yeremin, Yu.Ts.Oganessian

Development of a Plutonium Ceramic Target for the MASHA Separator

doi: 10.1016/j.nuclphysa.2004.03.006
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2002LO18      Radiochim.Acta 90, 833 (2002)

R.W.Lougheed, W.Webster, M.N.Namboodiri, D.R.Nethaway, K.J.Moody, J.H.Landrum, R.W.Hoff, R.J.Dupzyk, J.H.McQuaid, R.Gunnink, E.D.Watkins

239Pu and 241Am (n, 2n) cross-section measurements near En=14 MeV

NUCLEAR REACTIONS 239Pu, 241Am(n, 2n), E=13.7-15.1 MeV; measured σ. Activation technique.

Data from this article have been entered in the EXFOR database. For more information, access X4 dataset13883.


2002OG09      Eur.Phys.J. A 15, 201 (2002)

Y.T.Oganessian, V.K.Utyonkov, Y.V.Lobanov, F.S.Abdullin, A.N.Polyakov, I.V.Shirokovsky, Yu.S.Tsyganov, G.G.Gulbekian, S.L.Bogomolov, B.N.Gikal, A.N.Mezentsev, S.Iliev, V.G.Subbotin, A.M.Sukhov, O.V.Ivanov, G.V.Buklanov, K.Subotic, A.A.Voinov, M.G.Itkis, K.J.Moody, J.F.Wild, N.J.Stoyer, M.A.Stoyer, R.W.Lougheed, C.A.Laue

Synthesis of superheavy nuclei in the reactions of 244Pu and 248Cm with 48Ca

NUCLEAR REACTIONS 248Cm(48Ca, 4n), E=240 MeV; 244Pu(48Ca, 4n), (48Ca, 3n), E=236 MeV; measured delayed Eα, αα-coin.

RADIOACTIVITY 292Lv, 288,289Fl, 284,285Cn, 281Ds(α) [from 248Cm, 244Pu(48Ca, xn) and subsequent decay]; measured Eα, T1/2.

doi: 10.1140/epja/i2001-10254-4
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2001OG01      Phys.Rev. C63, 011301 (2001)

Yu.Ts.Oganessian, V.K.Utyonkov, Yu.V.Lobanov, F.Sh.Abdullin, A.N.Polyakov, I.V.Shirokovsky, Yu.S.Tsyganov, G.G.Gulbekian, S.L.Bogomolov, B.N.Gikal, A.N.Mezentsev, S.Iliev, V.G.Subbotin, A.M.Sukhov, O.V.Ivanov, G.V.Buklanov, K.Subotic, M.G.Itkis, K.J.Moody, J.F.Wild, N.J.Stoyer, M.A.Stoyer, R.W.Lougheed, C.A.Laue, Ye.A.Karelin, A.N.Tatarinov

Observation of the Decay of 292116

NUCLEAR REACTIONS 248Cm(48Ca, 4n), E=240 MeV; measured Eα, (recoil)α-, αα-coin; deduced evidence for 296Lv, 288Fl, 284Cn, 280Ds.

RADIOACTIVITY 292Lv, 288Fl, 284Cn(α); 280Ds(SF) [From 248Cm(48Ca, 4n), E=240 MeV, and subsequent decay]; measured Eα, T1/2.

doi: 10.1103/PhysRevC.63.011301
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2001OG08      Phys.Rev. C64, 054606 (2001)

Yu.Ts.Oganessian, V.K.Utyonkov, Yu.V.Lobanov, F.Sh.Abdullin, A.N.Polyakov, I.V.Shirokovsky, Yu.S.Tsyganov, A.N.Mezentsev, S.Iliev, V.G.Subbotin, A.M.Sukhov, K.Subotic, O.V.Ivanov, A.N.Voinov, V.I.Zagrebaev, K.J.Moody, J.F.Wild, N.J.Stoyer, M.A.Stoyer, R.W.Lougheed

Measurements of Cross Sections for the Fusion-Evaporation Reactions 204, 206, 207, 208Pb + 48Ca and 207Pb + 34S: Decay properties of the even-even nuclides 238Cf and 250No

NUCLEAR REACTIONS 206Pb(48Ca, n), (48Ca, 2n), (48Ca, 3n), (48Ca, 4n), E=214-243 MeV; 204,207,208Pb(48Ca, 2n), E=213-220 MeV; 207Pb(34S, 3n), E=160-180 MeV; measured σ. Recoil separator. Comparison with model predictions.

RADIOACTIVITY 250No(SF) [from 204,206Pb(48Ca, xn)]; measured T1/2.

doi: 10.1103/PhysRevC.64.054606
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2001OG09      Phys.Rev. C64, 064309 (2001)

Yu.Ts.Oganessian, V.K.Utyonkov, Yu.V.Lobanov, F.Sh.Abdullin, A.N.Polyakov, I.V.Shirokovsky, Yu.S.Tsyganov, A.N.Mezentsev, S.Iliev, V.G.Subbotin, A.M.Sukhov, G.V.Buklanov, K.Subotic, Yu.A.Lazarev, K.J.Moody, J.F.Wild, N.J.Stoyer, M.A.Stoyer, R.W.Lougheed, C.A.Laue

Average Charge States of Heavy Atoms in Dilute Hydrogen

ATOMIC PHYSICS Z=89-116; measured average charge states of ions vs velocity in gas-filled recoil separator. Application to synthesis of superheavy nuclei discussed.

doi: 10.1103/PhysRevC.64.064309
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2001ZH05      Phys.Rev. C63, 027302 (2001)

X.Q.Zhang, J.H.Hamilton, A.V.Ramayya, S.J.Zhu, J.K.Hwang, C.J.Beyer, J.Kormicki, E.F.Jones, P.M.Gore, B.R.S.Babu, T.N.Ginter, R.Aryaeinejad, K.Butler-Moore, J.D.Cole, M.W.Drigert, J.K.Jewell, E.L.Reber, J.Gilat, I.Y.Lee, J.O.Rasmussen, A.V.Daniel, Yu.Ts.Oganessian, G.M.Ter-Akopian, W.C.Ma, P.G.Varmette, L.A.Bernstein, R.W.Lougheed, K.J.Moody, M.A.Stoyer, R.Donangelo, J.-Y.Zhang

Observation of a νh11/2 Pair Alignment in Neutron-Rich 118Pd

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin. 118Pd deduced high-spin levels, J, π, configurations. Gammasphere array.

doi: 10.1103/PhysRevC.63.027302
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2000LA34      Phys.Rev. C62, 064307 (2000)

Yu.A.Lazarev, Yu.V.Lobanov, Yu.Ts.Oganessian, V.K.Utyonkov, F.Sh.Abdullin, A.N.Polyakov, J.Rigol, I.V.Shirokovsky, Yu.S.Tsyganov, S.Iliev, V.G.Subbotin, A.M.Sukhov, G.V.Buklanov, A.N.Mezentsev, K.Subotic, K.J.Moody, N.J.Stoyer, J.F.Wild, R.W.Lougheed

Decay Properties of 257No, 261Rf, and 262Rf

NUCLEAR REACTIONS 244Pu(22Ne, 4n), (22Ne, 5n), E=114, 120 MeV; 242Pu(22Ne, 4n), (22Ne, 5n), E=114 MeV; 238U(26Mg, 4n), (26Mg, 5n), E=134, 140 MeV; measured Eα, αα-coin following residual nucleus decay; deduced production σ.

RADIOACTIVITY 261,262Rf, 257No(α) [from 244Pu(22Ne, xn) and subsequent decay]; measured Eα, T1/2.

doi: 10.1103/PhysRevC.62.064307
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2000OG05      Phys.Rev. C62, 041604 (2000)

Yu.Ts.Oganessian, V.K.Utyonkov, Yu.V.Lobanov, F.Sh.Abdullin, A.N.Polyakov, I.V.Shirokovsky, Yu.S.Tsyganov, G.G.Gulbekian, S.L.Bogomolov, B.N.Gikal, A.N.Mezentsev, S.Iliev, V.G.Subbotin, A.M.Sukhov, O.V.Ivanov, G.V.Buklanov, K.Subotic, M.G.Itkis, K.J.Moody, J.F.Wild, N.J.Stoyer, M.A.Stoyer, R.W.Lougheed

Synthesis of Superheavy Nuclei in the 48Ca + 244Pu Reaction: 288114

NUCLEAR REACTIONS 244Pu(48Ca, 4n), E ≈ 236 MeV; measured Eα, αα-coin following residual nucleus decay, production σ; deduced evidence for 288Fl, 284Cn, 280Ds.

RADIOACTIVITY 288Fl, 284Cn(α); 280Ds(SF) [from 244Pu(48Ca, 4n) and subsequent decay]; measured Eα, T1/2. Comparison with model predictions.

doi: 10.1103/PhysRevC.62.041604
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2000OG07      Yad.Fiz. 63, No 10, 1769 (2000); Phys.Atomic Nuclei 63, 1679 (2000)

Yu.Ts.Oganessian, V.K.Utyonkov, Yu.V.Lobanov, F.Sh.Abdullin, A.N.Polyakov, I.V.Shirokovsky, Yu.S.Tsyganov, G.G.Gulbekian, S.L.Bogomolov, B.N.Gikal, A.N.Mezentsev, S.Iliev, V.G.Subbotin, A.M.Sukhov, O.V.Ivanov, G.V.Buklanov, K.Subotic, M.G.Itkis, K.J.Moody, J.F.Wild, N.J.Stoyer, M.A.Stoyer, R.W.Lougheed

Synthesis of Superheavy Nuclei in 48Ca + 244Pu Interactions

NUCLEAR REACTIONS 244Pu(48Ca, 3n), (48Ca, 4n), E ≈ 236 MeV; 248Cm(48Ca, 4n), E not given; measured Eα, fission fragments, (recoil)α-, αα-coin following residual nucleus decay; deduced evidence for 292Lv, 288,289Fl, 284,285Cn, 280,281Ds, 277Hs.

RADIOACTIVITY 292Lv, 288,289Fl, 284,285Cn, 281Ds(α); 280Ds, 277Hs(SF) [from 244Pu, 248Cm(48Ca, xn) and subsequent decay ]; measured Eα, T1/2.

doi: 10.1134/1.1320137
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2000ST30      Nucl.Instrum.Methods Phys.Res. A455, 433 (2000)

N.J.Stoyer, M.A.Stoyer, J.F.Wild, K.J.Moody, R.W.Lougheed, Yu.Ts.Oganessian, V.K.Utyonkov

Random Probability Analysis of Heavy-Element Data

RADIOACTIVITY 289Fl(α); analyzed Eα, αα-coin; deduced background features. Monte Carlo random probability method, Geiger-Nuttall criteria. Comparisons with other approaches.

doi: 10.1016/S0168-9002(00)00503-9
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2000ZH04      Phys.Rev. C61, 014305 (2000)

X.Q.Zhang, J.H.Hamilton, A.V.Ramayya, S.J.Zhu, J.K.Hwang, C.J.Beyer, J.Kormicki, E.F.Jones, P.M.Gore, B.R.S.Babu, T.N.Ginter, R.Aryaeinejad, K.Butler-Moore, J.D.Cole, M.W.Drigert, J.K.Jewell, E.L.Reber, J.Gilat, J.O.Rasmussen, A.V.Daniel, Yu.Ts.Oganessian, G.M.Ter-Akopian, W.C.Ma, P.G.Varmette, L.A.Bernstein, R.W.Lougheed, K.J.Moody, M.A.Stoyer

Identification of High Spin States in Neutron-Rich 113, 115, 117Pd Nuclei

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin. 113,115,117Pd deduced high-spin levels, J, π, configurations. Collective features in neighboring isotopes discussed.

doi: 10.1103/PhysRevC.61.014305
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1999BU32      J.Phys.(London) G25, 2253 (1999)

K.Butler-Moore, R.Aryaeinejad, X.Q.Zhang, B.R.S.Babu, J.H.Hamilton, A.V.Ramayya, J.K.Hwang, V.E.Oberacker, S.J.Zhu, J.Kormicki, L.K.Peker, J.D.Cole, Y.X.Dardenne, W.C.Ma, S.J.Asztalos, S.Y.Chu, K.E.Gregorich, I.Y.Lee, M.F.Mohar, J.O.Rasmussen, R.W.Lougheed, K.J.Moody, M.A.Stoyer, J.F.Wild, S.G.Prussin, G.M.Ter-Akopian, Yu.Ts.Oganessian, A.V.Daniel, J.Kliman, M.Morhac

High-Spin States in Neutron-Rich Even-Even Pd Isotopes

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin. 112,114,116Pd deduced high-spin levels, J, π, configurations. Gammasphere array. IBA calculations, level systematics in Pd isotopes discussed.

Data from this article have been entered in the XUNDL database. For more information, click here.


1999OG10      Phys.Rev.Lett. 83, 3154 (1999)

Yu.Ts.Oganessian, V.K.Utyonkov, Yu.V.Lobanov, F.Sh.Abdullin, A.N.Polyakov, I.V.Shirokovsky, Yu.S.Tsyganov, G.G.Gulbekian, S.L.Bogomolov, B.N.Gikal, A.N.Mezentsev, S.Iliev, V.G.Subbotin, A.M.Sukhov, G.V.Buklanov, K.Subotic, M.G.Itkis, K.J.Moody, J.F.Wild, N.J.Stoyer, M.A.Stoyer, R.W.Lougheed

Synthesis of Superheavy Nuclei in the 48Ca + 244Pu Reaction

NUCLEAR REACTIONS 244Pu(48Ca, 3n), E=236 MeV; measured σ, Eα, Iα(t), αα-, (recoil)α-coin following residual nucleus decay; deduced evidence for 289Fl, 285Cn, 281Ds.

RADIOACTIVITY 289Fl, 285Cn, 281Ds(α) [from 244Pu(48Ca, 3n) and subsequent decay]; measured Eα, T1/2; deduced enhanced stability with respect to neutron number.

doi: 10.1103/PhysRevLett.83.3154
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1999SA58      Phys.Rev. C60, 067303 (1999)

M.Sakhaee, S.J.Zhu, J.H.Hamilton, A.V.Ramayya, J.K.Hwang, X.Q.Zhang, L.M.Yang, L.Y.Zhu, C.Y.Gan, E.F.Jones, P.M.Gore, T.N.Ginter, B.R.S.Babu, W.C.Ma, J.Kormicki, C.J.Beyer, G.L.Long, J.K.Deng, K.Li, J.D.Cole, R.Aryaeinejad, M.W.Drigert, J.O.Rasmussen, S.Asztalos, I.Y.Lee, A.O.Macchiavelli, S.Y.Chu, K.E.Gregorich, M.F.Mohar, M.A.Stoyer, R.W.Lougheed, K.J.Moody, J.F.Wild, S.G.Prussin, G.M.Ter-Akopian, A.V.Daniel, Yu.Ts.Oganessian

Identification of Levels in Neutron-Rich 145Ce and 147Ce Nuclei

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin. 145,147Ce deduced high-spin levels, J, π, configurations. Gammasphere array. Comparison with particle-plus-rotor calculations.

doi: 10.1103/PhysRevC.60.067303
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1999UT01      Phys.Rev.Lett. 82, 505 (1999)

S.B.Utter, P.Beiersdorfer, A.Barnes, R.W.Lougheed, J.R.C.Lopez-Urrutia, J.A.Becker, M.S.Weiss

Reexamination of the Optical Gamma Ray Decay in 229Th

RADIOACTIVITY 233U(α); measured photon spectra; deduced alpha flourescence in air. 229Th deduced no observation of decay from first excited level.

doi: 10.1103/PhysRevLett.82.505
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1999ZH05      Phys.Rev. C59, 1316 (1999)

S.J.Zhu, J.H.Hamilton, A.V.Ramayya, M.G.Wang, J.K.Hwang, E.F.Jones, L.K.Peker, B.R.S.Babu, G.Drafta, W.C.Ma, G.L.Long, L.Y.Zhu, M.Li, C.Y.Gan, T.N.Ginter, J.Kormicki, J.K.Deng, D.T.Shi, W.E.Collins, J.D.Cole, R.Aryaeinejad, M.W.Drigert, J.O.Rasmussen, R.Donangelo, J.Gilat, S.Asztalos, I.Y.Lee, A.O.Macchiavelli, S.Y.Chu, K.E.Gregorich, M.F.Mohar, M.A.Stoyer, R.W.Lougheed, K.J.Moody, J.F.Wild, S.G.Prussin, G.M.Ter-Akopian, A.V.Daniel, Yu.Ts.Oganessian

Octupole Correlations in Neutron-Rich 145, 147La Nuclei: Coriolis-limit-coupling bands with aligned h11/2 Proton

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin. 145,147La deduced high-spin levels, possible J, π, B(E1)/B(E2), octupole correlations. Cranked shell model analysis. Gammasphere array.

doi: 10.1103/PhysRevC.59.1316
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1999ZH31      Phys.Rev. C60, 051304 (1999)

S.J.Zhu, J.H.Hamilton, A.V.Ramayya, E.F.Jones, J.K.Hwang, M.G.Wang, X.Q.Zhang, P.M.Gore, L.K.Peker, G.Drafta, B.R.S.Babu, W.C.Ma, G.L.Long, L.Y.Zhu, C.Y.Gan, L.M.Yang, M.Sakhaee, M.Li, J.K.Deng, T.N.Ginter, C.J.Beyer, J.Kormicki, J.D.Cole, R.Aryaeinejad, M.W.Drigert, J.O.Rasmussen, S.Asztalos, I.Y.Lee, A.O.Macchiavelli, S.Y.Chu, K.E.Gregorich, M.F.Mohar, G.M.Ter-Akopian, A.V.Daniel, Yu.Ts.Oganessian, R.Donangelo, M.A.Stoyer, R.W.Lougheed, K.J.Moody, J.F.Wild, S.G.Prussin, J.Kliman, H.C.Griffin

Octupole Correlations in Neutron-Rich 143, 145Ba and a Type of Superdeformed Band in 145Ba

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin. 143,145Ba deduced high-spin levels, J, π, B(E1)/B(E2), possible stable octupole deformation. Gammasphere array.

doi: 10.1103/PhysRevC.60.051304
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1998HA65      Nuovo Cim. 111A, 633 (1998)

J.H.Hamilton, E.F.Jones, P.M.Gore, A.V.Ramayya, R.S.Dodder, C.J.Beyer, J.K.Hwang, X.Q.Zhang, S.J.Zhu, A.P.de Lima, J.Kormicki, J.D.Cole, R.Aryaeinejad, W.C.Ma, G.M.Ter-Akopian, Yu.Ts.Oganessian, A.V.Daniel, J.O.Rasmussen, S.J.Asztalos, I.Y.Lee, A.O.Macchiavelli, M.A.Stoyer, R.W.Lougheed, S.G.Prussin, R.Donangelo

A New Phenomenon-Shifted Identical Bands and New Region of Stable Octupole Deformation

NUCLEAR STRUCTURE Nd, Sm, Gd, Dy, Hf, Yb; analyzed rotational bands transition energies; deduced shifted identical bands. 107,109Mo; analyzed levels, J, π; deduced stable octupole deformation.


1998HW02      J.Phys.(London) G24, L9 (1998)

J.K.Hwang, A.V.Ramayya, J.H.Hamilton, L.K.Peker, J.Kormicki, B.R.S.Babu, T.N.Ginter, C.J.Beyer, G.M.Ter-Akopian, Yu.Ts.Oganessian, A.V.Daniel, W.C.Ma, P.G.Varmette, J.O.Rasmussen, S.J.Asztalos, S.Y.Chu, K.E.Gregorich, A.O.Macchiavelli, R.W.Macleod, J.Gilat, J.D.Cole, R.Aryaeinejad, K.Butler-Moore, M.W.Drigert, M.A.Stoyer, L.A.Bernstein, R.W.Lougheed, K.J.Moody, S.G.Prussin, H.C.Griffin, R.Donangelo

Close Doublet Structures in 103Mo, 109,111Ru, and Neighbours: Rotation-alignment for the half-filled h11/2 subshell ( Question )

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin. 103,105Mo, 109,111Ru deduced levels, band structure, possible J, π, configurations, evidence for rotation alignment. Comparison with other nuclei.

doi: 10.1088/0954-3899/24/5/009
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1998HW04      Phys.Rev. C57, 2250 (1998); Erratum Phys.Rev. C58, 3013 (1998)

J.K.Hwang, A.V.Ramayya, J.H.Hamilton, L.K.Peker, J.Kormicki, B.R.S.Babu, T.N.Ginter, C.J.Beyer, J.O.Rasmussen, J.Gilat, S.J.Asztalos, S.Y.Chu, K.E.Gregorich, A.O.Macchiavelli, R.W.Macleod, G.M.Ter-Akopian, Yu.Ts.Oganessian, A.V.Daniel, W.C.Ma, P.G.Varmette, J.D.Cole, R.Aryaeinejad, K.Butler-Moore, M.W.Drigert, M.A.Stoyer, L.A.Bernstein, R.W.Lougheed, K.J.Moody, S.G.Prussin, H.C.Griffin, R.Donangelo, S.J.Zhu

Identification of the γ Transitions in Tc and Cs Products of 252Cf Fission and Possible (7/2)+ [413] Bands in 105-109Tc Isotopes

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin. 105Tc deduced high-spin levels, J, π, rotational bands. 106,107,108,109Tc deduced levels, possible J, π. 139,140,141,142,143Cs deduced levels.

doi: 10.1103/PhysRevC.57.2250
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1998RA09      Phys.Rev. C57, 2370 (1998)

A.V.Ramayya, J.H.Hamilton, J.K.Hwang, L.K.Peker, J.Kormicki, B.R.S.Babu, T.N.Ginter, A.Sandulescu, A.Florescu, F.Carstoiu, W.Greiner, G.M.Ter-Akopian, Yu.Ts.Oganessian, A.V.Daniel, W.C.Ma, P.G.Varmette, J.O.Rasmussen, S.J.Asztalos, S.Y.Chu, K.E.Gregorich, A.O.Macchiavelli, R.W.Macleod, J.D.Cole, R.Aryaeinejad, K.Butler-Moore, M.W.Drigert, M.A.Stoyer, L.A.Bernstein, R.W.Lougheed, K.J.Moody, S.G.Prussin, S.J.Zhu, H.C.Griffin, R.Donangelo

Cold (Neutronless) α Ternary Fission of 252Cf

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin; deduced α-associated ternary fission isotopic yields.

doi: 10.1103/PhysRevC.57.2370
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1998ZH12      Phys.Rev. C57, 2040 (1998); Erratum Phys.Rev. C58, 3012 (1998)

X.Q.Zhang, J.H.Hamilton, A.V.Ramayya, L.K.Peker, J.K.Hwang, E.F.Jones, J.Kormicki, C.J.Beyer, P.M.Gore, B.R.S.Babu, T.N.Ginter, S.J.Asztalos, S.Y.Chu, K.E.Gregorich, I.Y.Lee, A.O.Macchiavelli, R.W.Macleod, J.O.Rasmussen, J.Gilat, G.M.Ter-Akopian, Yu.Ts.Oganessian, A.V.Daniel, W.C.Ma, P.G.Varmette, J.D.Cole, R.Aryaeinejad, K.Butler-Moore, Y.X.Dardenne, M.W.Drigert, M.A.Stoyer, J.F.Wild, J.A.Becker, L.A.Bernstein, R.W.Lougheed, K.J.Moody, R.Donangelo, S.G.Prussin, H.C.Griffin, S.J.Zhu

Identification of New Negative-Parity Levels in 152,154Nd

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin. 152,154Nd deduced high-spin levels, J, π, negative-parity bands.

doi: 10.1103/PhysRevC.57.2040
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1997DO20      Nuovo Cim. 110A, 949 (1997)

R.S.Dodder, E.F.Jones, J.H.Hamilton, A.V.Ramayya, P.Gore, C.J.Beyer, A.P.De Lima, J.K.Hwang, X.Q.Zhang, S.J.Zhu, Q.H.Lu, T.Ginter, B.R.S.Babu, M.G.Wang, J.Kormicki, J.K.Deng, D.Shi, J.D.Cole, R.Aryaeinejad, K.Butler-Moore, M.W.Drigert, W.C.Ma, G.M.Ter-Akopian, Yu.Ts.Oganessian, A.V.Daniel, J.O.Rasmussen, S.J.Asztalos, I.Y.Lee, A.O.Machiavelli, M.A.Stoyer, R.W.Lougheed, Y.X.Dardenne, S.G.Prussin, R.Donangelo

Identical and Shifted Identical Bands

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-, (X-ray)γ-coin. 156,158,160Sm, 160,162Gd deduced levels, J, π, identical bands features.

doi: 10.1007/BF03035931
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1997HA64      Prog.Part.Nucl.Phys. 38, 273 (1997)

J.H.Hamilton, A.V.Ramayya, J.K.Hwang, J.Kormicki, B.R.S.Babu, A.Sandulescu, A.Florescu, W.Greiner, G.M.Ter-Akopian, Yu.Ts.Oganessian, A.V.Daniel, S.J.Zhu, M.G.Wang, T.Ginter, J.K.Deng, W.C.Ma, G.S.Popeko, Q.H.Lu, E.Jones, R.Dodder, P.Gore, W.Nazarewicz, J.O.Rasmussen, S.Asztalos, I.Y.Lee, S.Y.Chu, K.E.Gregorich, A.O.Macchiavelli, M.F.Mohar, S.Prussin, M.A.Stoyer, R.W.Lougheed, K.J.Moody, J.F.Wild, L.A.Bernstein, J.A.Becker, J.D.Cole, R.Aryaeinejad, Y.X.Dardenne, M.W.Drigert, K.Butler-Moore, R.Donangelo, H.C.Griffin

New Cold and Ultra Hot Binary and Cold Ternary Spontaneous Fission Modes for 252Cf and New Band Structures with Gammasphere

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-, (X-ray)γ-coin, prompt neutron multiplicity following binary, ternary fission; deduced fragments isotopic yields. 142,143,144,145,146,148Ba, 140Xe, 144Ce, 99,100,102Zr, 98,100Sr, 112,114,116Pd, 156,158,160Sm deduced high-spin levels, J, π, rotational bands features. 108,110,112Ru, 148,150,152Ce, 146,148,150,152,154Nd, 140Ba, 98Sr, 104Zr deduced rotational bands features. Gammasphere array.

doi: 10.1016/S0146-6410(97)00037-9
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1997HW02      Int.J.Mod.Phys. E6, 331 (1997)

J.K.Hwang, A.V.Ramayya, J.H.Hamilton, J.Kormicki, L.K.Peker, B.R.S.Babu, T.N.Ginter, G.M.Ter-Akopian, Yu.Ts.Oganessian, A.V.Daniel, W.C.Ma, P.G.Varmette, S.J.Asztalos, S.Y.Chu, K.E.Gregorich, I.Y.Lee, A.O.Macchiavelli, R.W.Macleod, J.O.Rasmussen, J.D.Cole, R.Aryaeinejad, K.Butler-Moore, Y.X.Dardenne, M.W.Drigert, M.A.Stoyer, J.F.Wild, J.A.Becker, L.A.Bernstein, R.W.Lougheed, K.J.Moody, R.Donangelo, S.G.Prussin, H.C.Griffin

Identification of the ν3/2-[521] Band in 153Nd and the γ-Transitions in 149Nd

RADIOACTIVITY 252Cf(SF); measured γγ-coin; deduced E2 transition energies in N=93 isotones, N=89 isotones Eγ. 149Nd deduced high-spin level associated transitions. 153Nd deduced high-spin levels, band structure, signature splitting related features, moment of inertia. Other data input.

doi: 10.1142/S0218301397000226
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1997HW03      Phys.Rev. C56, 1344 (1997)

J.K.Hwang, A.V.Ramayya, J.H.Hamilton, L.K.Peker, J.Kormicki, B.R.S.Babu, T.N.Ginter, G.M.Ter-Akopian, Yu.Ts.Oganessian, A.V.Daniel, W.C.Ma, P.G.Varmette, J.O.Rasmussen, S.J.Asztalos, S.Y.Chu, K.E.Gregorich, A.O.Macchiavelli, R.W.Macleod, J.Gilat, J.D.Cole, R.Aryaeinejad, K.Butler-Moore, M.W.Drigert, M.A.Stoyer, Y.X.Dardenne, J.A.Becker, L.A.Bernstein, R.W.Lougheed, K.J.Moody, S.G.Prussin, H.C.Griffin, R.Donangelo

Identification of 109Mo and Possible Octupole Correlations in 107,109Mo

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin. 107,109Mo deduced high-spin levels, J, π, B(E1)/B(E2), configurations, octupole deformation.

doi: 10.1103/PhysRevC.56.1344
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1997RA39      Nuovo Cim. 110A, 1073 (1997)

A.V.Ramayya, J.H.Hamilton, J.K.Hwang, L.K.Peker, J.Kormicki, B.R.S.Babu, T.N.Ginter, A.Sandulescu, A.Florescu, F.Carstoiu, W.Greiner, G.M.Ter-Akopian, Yu.Ts.Oganessian, A.V.Daniel, W.C.Ma, P.G.Varmette, J.O.Rasmussen, S.J.Asztalos, S.Y.Chu, K.E.Gregorich, A.O.Macchiavelli, R.W.MacLeod, J.D.Cole, R.Aryaeinejad, K.Butler-Moore, M.W.Drigert, M.A.Stoyer, L.A.Bernstein, R.W.Lougheed, K.J.Moody, S.G.Prussin, S.J.Zhu, H.C.Griffin, R.Donangelo

Cold Binary and Ternary Fragmentations in Spontaneous Fission of 252Cf

RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin; deduced fragment isotopic yields, binary, α-associated ternary events features.

doi: 10.1007/BF03035948
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1996BA34      Phys.Rev. C54, 568 (1996)

B.R.S.Babu, S.J.Zhu, A.V.Ramayya, J.H.Hamilton, L.K.Peker, M.G.Wang, T.N.Ginter, J.Kormicki, W.C.Ma, J.D.Cole, R.Aryaeinejad, K.Butler-Moore, Y.X.Dardenne, M.W.Drigert, G.M.Ter-Akopian, Yu.Ts.Oganessian, J.O.Rasmussen, S.Asztalos, I.Y.Lee, A.O.Macchiavelli, S.Y.Chu, K.E.Gregorich, M.F.Mohar, S.Prussin, M.A.Stoyer, R.W.Lougheed, K.J.Moody, J.F.Wild

Identification of γ Transitions in 147Ba, 149Ce, and 151,153Nd

RADIOACTIVITY 252Cf(SF); measured γγγ-, γ(X-ray)-, γγ(X-ray)-, γγ-coin. 147Ba, 151,153Nd, 149Ce deduced high-spin levels, J, π, configuration, band structure.

doi: 10.1103/PhysRevC.54.568
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1996DA16      Phys.Rev. C54, 206 (1996)

Y.X.Dardenne, R.Aryaeinejad, S.J.Asztalos, B.R.S.Babu, K.Butler-Moore, S.Y.Chu, J.D.Cole, M.W.Drigert, K.E.Gregorich, J.H.Hamilton, J.Kormicki, I.Y.Lee, R.W.Lougheed, Q.H.Lu, W.-C.Ma, M.F.Mohar, K.J.Moody, S.G.Prussin, A.V.Ramayya, J.O.Rasmussen, M.A.Stoyer, J.F.Wild

Observation of Cold Fission in 242Pu Spontaneous Fission

RADIOACTIVITY 242Pu(SF); measured γγ-coin following fission; deduced relative yields for Zr-Xe, Sr-Ba, Mo-Te isotope pairs.

doi: 10.1103/PhysRevC.54.206
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1996LA12      Phys.Rev. C54, 620 (1996)

Yu.A.Lazarev, Yu.V.Lobanov, Yu.Ts.Oganessian, V.K.Utyonkov, F.Sh.Abdullin, A.N.Polyakov, J.Rigol, I.V.Shirokovsky, Yu.S.Tsyganov, S.Iliev, V.G.Subbotin, A.M.Sukhov, G.V.Buklanov, B.N.Gikal, V.B.Kutner, A.N.Mezentsev, K.Subotic, J.F.Wild, R.W.Lougheed, K.J.Moody

α Decay of 273110: Shell closure at N = 162

NUCLEAR REACTIONS 244Pu(34S, X), E=190 MeV; measured Eα, Iα; deduced production σ for 273Ds.

RADIOACTIVITY 273Ds(α) [from 244Pu(34S, X), E=190 MeV]; measured Eα, Iα, T1/2.

doi: 10.1103/PhysRevC.54.620
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1995BU14      Phys.Rev. C52, 1339 (1995)

K.Butler-Moore, R.Aryaeinejad, J.D.Cole, Y.Dardenne, R.G.Greenwood, J.H.Hamilton, A.V.Ramayya, W.-C.Ma, B.R.S.Babu, J.O.Rasmussen, M.A.Stoyer, S.Y.Chu, K.E.Gregorich, M.Mohar, S.Asztalus, S.G.Prussin, K.J.Moody, R.W.Lougheed, J.F.Wild

Evidence of Unique-Parity Band Structure in Neutron-Rich Odd-A Ru Isotopes

RADIOACTIVITY 252Cf(SF); measured γγγ-, γγ-, γ(X-ray), (X-ray)(X-ray)-coin following fission fragment decay. 109,111Ru deduced transitions, γ-multipolarity, levels, J, π. Models comparison.

doi: 10.1103/PhysRevC.52.1339
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1995LA20      Phys.Rev.Lett. 75, 1903 (1995)

Yu.A.Lazarev, Yu.V.Lobanov, Yu.Ts.Oganessian, Yu.S.Tsyganov, V.K.Utyonkov, F.Sh.Abdullin, S.Iliev, A.N.Polyakov, J.Rigol, I.V.Shirokovsky, V.G.Subbotin, A.M.Sukhov, G.V.Buklanov, B.N.Gikal, V.B.Kutner, A.N.Mezentsev, I.M.Sedykh, D.V.Vakatov, R.W.Lougheed, J.F.Wild, K.J.Moody, E.K.Hulet

New Nuclide 267108 Produced by the 238U + 34S Reaction

NUCLEAR REACTIONS, ICPND 238U(34S, X)267Hs, E=186 MeV; measured Eα, Iα; deduced residual production σ.

RADIOACTIVITY 267Hs(α) [from 238U(34S, X), E=186 MeV]; measured Eα, Iα, T1/2.

doi: 10.1103/PhysRevLett.75.1903
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1995SC53      Radiochim.Acta 68, 7 (1995)

M.Schadel, E.Jager, W.Bruchle, K.Summerer, E.K.Hulet, J.F.Wild, R.W.Lougheed, R.J.Dougan, K.J.Moody

Radiochemical Search for Neutron-Rich Isotopes of Nielsbohrium in the 16O + 254Es Reaction

NUCLEAR REACTIONS, ICPND 254Es(16O, xn)E=113, 116 MeV; measured α-spectra following residual decay; deduced production σ for 265,266,267107 vs assumed T1/2. On-line gas chromatography.


1995ZH34      Phys.Lett. 357B, 273 (1995)

S.J.Zhu, Q.H.Lu, J.H.Hamilton, A.V.Ramayya, L.K.Peker, M.G.Wang, W.C.Ma, B.R.S.Babu, T.N.Ginter, J.Kormicki, D.Shi, J.K.Deng, W.Nazarewicz, J.O.Rasmussen, M.A.Stoyer, S.Y.Chu, K.E.Gregorich, M.F.Mohar, S.Asztalos, S.G.Prussin, J.D.Cole, R.Aryaeinejad, Y.K.Dardenne, M.Drigert, K.J.Moody, R.W.Lougheed, J.F.Wild, N.R.Johnson, I.Y.Lee, F.K.McGowan, G.M.Ter-Akopian, Yu.Ts.Oganessian

Octupole Deformation in 142,143Ba and 144Ce: New band structures in neutron-rich Ba-isotopes

RADIOACTIVITY 252Cf(SF); 242Pu(SF); measured γγ-, γγγ-coin following fission fragment decay. 142,143,144,145,146,147Ba, 144Ce deduced high-spin levels, J, π, band structure, shape features, B(λ) in some cases.

doi: 10.1016/0370-2693(95)00900-6
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Data from this article have been entered in the XUNDL database. For more information, click here.


1994DA41      Proc.Intern.Conf.Nuclear Data for Science and Technology, Gatlinburg, Tennesse, 9-13 May, 1994, J.K.Dickens, Ed., American Nuclear Society, Vol.1, p.245 (1994)

Y.Danon, M.S.Moore, P.E.Koehler, R.W.Lougheed, R.W.Hoff, N.W.Hill

Measurement and analysis of the neutron-induced fission cross section s of 247Cm, 250Cf and 254Es

NUCLEAR REACTIONS 247Cm(n, n), 247Cm(n, f), 250Cf(n, f), 254Es(n, f), E=-8.8E-4 eV-9.8 keV; measured products; deduced σ, σ(E), resonance parameters. Data were imported from EXFOR entry 13646.

Data from this article have been entered in the EXFOR database. For more information, access X4 dataset13646.


1994LA22      Phys.Rev.Lett. 73, 624 (1994)

Yu.A.Lazarev, Yu.V.Lobanov, Yu.Ts.Oganessian, V.K.Utyonkov, F.Sh.Abdullin, G.V.Buklanov, B.N.Gikal, S.Iliev, A.N.Mezentsev, A.N.Polyakov, I.M.Sedykh, I.V.Shirokovsky, V.G.Subbotin, A.M.Sukhov, Yu.S.Tsyganov, V.E.Zhuchko, R.W.Lougheed, K.J.Moody, J.F.Wild, E.K.Hulet, J.H.McQuaid

Discovery of Enhanced Nuclear Stability Near the Deformed Shells N = 162 and Z = 108

NUCLEAR REACTIONS 248Cm(22Ne, X), E=116, 121 MeV; measured Eα, Iα; deduced evidence for 265Sg, 266Sg.

RADIOACTIVITY 265Sg, 266Sg(α); measured Eα, Iα; deduced T1/2, SF-decay upper limits. 262Rf [from 266Sg(α-decay)]; measured T1/2.

doi: 10.1103/PhysRevLett.73.624
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1994LO27      J.Alloys and Compounds 213/214, 61 (1994)

R.W.Lougheed, K.J.Moody, J.FD.Wild, E.K.Hulet, J.H.McQuaid, Yu.A.Lazarev, Yu.V.Lobanov, Yu.Ts.Oganessian, V.K.Utyonkov, F.Sh.Abdullin, G.V.Buklanov, B.N.Gikal, S.Iliev, A.N.Mezentsev, A.N.Polyakov, I.M.Sedykh, I.V.Shirokovsky, V.G.Subbotin, A.M.Sukhov, Yu.S.Tsyganov, V.E.Zhuchko

Observation of enhanced nuclear stability near the 162 neutron shell

RADIOACTIVITY 265,266Sg(α) [from 248Cm(22Ne, xn)]; measured Eα, T1/2. 262Rf(SF) [from 266Sg decay]; measured T1/2. Comparison with model predictions.

doi: 10.1016/0925-8388(94)90881-8
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1994WI17      J.Alloys and Compounds 213/214, 86 (1994)

J.F.Wild, E.K.Hulet, R.W.Lougheed, K.J.Moody, B.B.Bandong, R.J.Dougan, A.Veeck

Spontaneous fission properties of 252, 254No and 256, 258[104] and the disappearance of the outer fission barrier

RADIOACTIVITY 252,254No(SF) [from 244,246Cm(12C, 4n)]; 256,258Rf(SF) [from 244Cm(16O, 4n) and 249Cf(12C, 3n)]; measured fission fragment kinetic energy and mass distributions; deduced fission barrier features.

doi: 10.1016/0925-8388(94)90885-0
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14054.


1993MO18      Nucl.Phys. A563, 21 (1993)

K.J.Moody, R.W.Lougheed, J.F.Wild, R.J.Dougan, E.K.Hulet, R.W.Hoff, C.M.Henderson, R.J.Dupzyk, R.L.Hahn, K.Summerer, G.D.O'Kelley, G.R.Bethune

Decay Properties of Heavy Mendelevium Isotopes

NUCLEAR REACTIONS, ICPND 254Es(18O, X)256Md/255Md/257Md/258Md/258mMd/259Md/260Md, E=105 MeV; 254Es(22Ne, X)256Md/255Md/257Md/258Md/258mMd/259Md/260Md, E=126 MeV; measured Eα, Iα; deduced residual nuclei production σ.

RADIOACTIVITY 256Md(EC), (α); 257Md(EC), (α), (SF); 258Md(α), (SF), (EC), (β-); 258mMd(EC), (α), (SF), (β-); 259Md(SF), (α); measured Eα, Iα, γ-spectra, SF-decay; deduced T1/2, branching ratio. 256,257,258Md deduced mass excess. 259Md deduced SF-decay hindrance factor. 252,253,254Es deduced levels, J, π, γ transitions.

doi: 10.1016/0375-9474(93)90010-U
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14283.


1992MO25      Phys.Rev. C46, 2624 (1992)

K.J.Moody, R.W.Lougheed, E.K.Hulet

Search for the Double Beta Decay of 244Pu

RADIOACTIVITY 244Pu(2β-); measured ingrowth of 244Cm, alpha activity; deduced T1/2 limit.

doi: 10.1103/PhysRevC.46.2624
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1991DA19      Nucl.Sci.Eng. 109, 341 (1991)

Y.Danon, R.E.Slovacek, R.C.Block, R.W.Lougheed, R.W.Hoff, M.S.Moore

Fission Cross-Section Measurements of 247Cm, 254Es, and 250Cf from 0.1 eV to 80 keV

NUCLEAR REACTIONS 247Cm, 254Es, 250Cf(n, F), E ≤ 80 keV; measured fission σ(E). 248Cm deduced resonance widths.

doi: 10.13182/NSE91-A23859
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset13197.


1990MO01      Phys.Rev. C41, 152 (1990)

K.J.Moody, R.W.Lougheed, R.J.Dougan, E.K.Hulet, J.F.Wild, K.Summerer, R.L.Hahn, J.van Aarle, G.R.Bethune

Actinide Cross Sections from the Reaction of 13C with 254gEs

NUCLEAR REACTIONS 254Es(13C, X), E=72 MeV; measured production σ for 252-256Es, 253-257Fm, 255-260Md, 256,257,259No, 259-262Lr, 261104, 262105; deduced reaction σ, production mechanism.

doi: 10.1103/PhysRevC.41.152
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC0898.


1990WI01      Phys.Rev. C41, 640 (1990)

J.F.Wild, J.van Aarle, W.Westmeier, R.W.Lougheed, E.K.Hulet, K.J.Moody, R.J.Dougan, E.-A.Koop, R.E.Glaser, R.Brandt, P.Patzelt

Prompt Neutron Emission from the Spontaneous Fission of 260Md

NUCLEAR REACTIONS 254Es(22Ne, X), E=126 MeV; measured (neutron)(fragment)-coin; deduced 260Md production evidence.

RADIOACTIVITY 260Md(SF) [from 254Es(22Ne, X), E=126 MeV]; measured fission neutron multiplicity distribution, emission probabilities.

doi: 10.1103/PhysRevC.41.640
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset13186.


1989HU09      Phys.Rev. C40, 770 (1989)

E.K.Hulet, J.F.Wild, R.J.Dougan, R.W.Lougheed, J.H.Landrum, A.D.Dougan, P.A.Baisden, C.M.Henderson, R.J.Dupzyk, R.L.Hahn, M.Schadel, K.Summerer, G.R.Bethune

Spontaneous Fission Properties of 258Fm, 259Md, 260Md, 258No, and 260[104]: Bimodal fission

RADIOACTIVITY 258Fm, 258No, 259,260Md, 260Rf(SF); measured fission fragment mass, kinetic energy distributions; deduced fission features.

doi: 10.1103/PhysRevC.40.770
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset13191.


1988SA18      Phys.Rev. C37, 2371 (1988)

J.-L.Salicio, S.Drissi, M.Gasser, J.Kern, H.G.Borner, G.G.Colvin, K.Schreckenbach, R.W.Hoff, R.W.Lougheed

Level Structure of the Doubly-Odd 242Am Nucleus

NUCLEAR REACTIONS 241Am(n, γ), (n, e-), E=thermal; measured Eγ, Iγ. 242Am levels deduced J, π, δ. Nilsson model.

doi: 10.1103/PhysRevC.37.2371
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1987WH01      Phys.Rev. C35, 81 (1987)

D.H.White, H.G.Borner, R.W.Hoff, K.Schreckenbach, W.F.Davidson, T.von Egidy, D.D.Warner, P.Jeuch, G.Barreau, W.R.Kane, M.L.Stelts, R.E.Chrien, R.F.Casten, R.G.Lanier, R.W.Lougheed, R.T.Kouzes, R.A.Naumann, R.Dewberry

Nuclear Structure of 231Th from Neutron Capture and (d, p) Reaction Measurements

NUCLEAR REACTIONS 230Th(n, γ), E=thermal, 2 keV; 230Th(d, p), E=20 MeV; measured Eγ, Iγ, I(ce), σ(θp), σ(Ep). 231Th deduced levels, J, π, rotational bands, Nilsson assignments, K. Enriched target, curved crystal, Q3D spectrometer.

doi: 10.1103/PhysRevC.35.81
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC0204.


1986BL10      Radiat.Eff. 92, 305 (1986)

R.C.Block, D.R.Harris, H.T.Maguire, Jr., C.R.S.Stopa, R.E.Slovacek, J.W.T.Dabbs, R.J.Dougan, R.W.Hoff, R.W.Lougheed

Intermediate Structure in the Fission Cross Sections of the Even Curium Isotopes

NUCLEAR REACTIONS 244,246,248Cm(n, F), E ≤ 100 keV; analyzed fission σ(E); deduced structure. 245,247,249Cm deduced barrier parameter differences.

doi: 10.1080/00337578608208340
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1986CZ02      Nucl.Phys. A458, 123 (1986)

T.Czosnyka, D.Cline, L.Hasselgren, C.Y.Wu, R.M.Diamond, H.Kluge, C.Roulet, E.K.Hulet, R.W.Lougheed, C.Baktash

E2 Properties of the Ground State Band in 248Cm

NUCLEAR REACTIONS 248Cm(136Xe, 136Xe'), E=641 MeV; 248Cm(58Ni, 58Ni'), E=260 MeV; measured Eγ, Iγ following Coulomb excitation. 248Cm levels deduced J, π, E2 transition matrix elements.

doi: 10.1016/0375-9474(86)90286-1
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1986HU01      Phys.Rev.Lett. 56, 313 (1986)

E.K.Hulet, J.F.Wild, R.J.Dougan, R.W.Lougheed, J.H.Landrum, A.D.Dougan, M.Schadel, R.L.Hahn, P.A.Baisden, C.M.Henderson, R.J.Dupzyk, K.Summerer, G.R.Bethune

Bimodal Symmetric Fission Observed in the Heaviest Elements

RADIOACTIVITY 258Fm(SF); 258m,259,260Md(SF) [from 254Es(18O, X), E=105 MeV; 254Es(22Ne, X), E=16 MeV]; 258No(SF) [from 248Cm(13C, X), E=81 MeV]; 260Rf(SF) [from 249Bk(15N, X), E=81 MeV]; measured fission fragment mass, kinetic energy partitioning; deduced bimodal symmetric fission evidence.

doi: 10.1103/PhysRevLett.56.313
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1986HU05      Phys.Rev. C34, 1394 (1986)

E.K.Hulet, R.W.Lougheed, J.F.Wild, R.J.Dougan, K.J.Moody, R.L.Hahn, C.M.Henderson, R.J.Dupzyk, G.R.Bethune

Z and A Identification of 370-μs 258Fm

RADIOACTIVITY 258mFm(SF) [from 258mMd(EC-decay)]; measured fission (fragment)(X-ray) time correlation; deduced T1/2, charge, mass. Ge and Si-Au detectors.

doi: 10.1103/PhysRevC.34.1394
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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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1986LO16      J.Less-Common Met. 122, 461 (1986)

R.W.Lougheed, E.K.Hulet, R.J.Dougan, J.F.Wild, R.J.Dupzyk, C.M.Henderson, K.J.Moody, R.L.Hahn, K.Summerer, G.Bethune

The Discovery of 260Md and the Decay Properties of 258Fm, 258m,258gMd and 259Md

NUCLEAR REACTIONS 254Es(18O, xnyp), E=105 MeV; 254Es(22Ne, xnyp), E=126 MeV; measured Fm, Md isotope production σ.

RADIOACTIVITY 260Md(SF) [from 254Es(18O, xnyp), E=105 MeV; 254Es(22Ne, xnyp), E=126 MeV]; measured T1/2. 258mMd(EC), 258,259Md, 258Fm(SF) [from 254Es(18O, xnyp), E=105 MeV; 254Es(22Ne, xnyp), E=126 MeV]; measured decay characteristics, T1/2.

doi: 10.1016/0022-5088(86)90442-X
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1986MO06      Phys.Rev. C33, 1315 (1986)

K.J.Moody, D.Lee, R.B.Welch, K.E.Gregorich, G.T.Seaborg, R.W.Lougheed, E.K.Hulet

Actinide Production in Reactions of Heavy Ions with 248Cm

NUCLEAR REACTIONS 248Cm(16O, X), E=96.5 MeV; 248Cm(136Xe, X), E=699-790 MeV; 248Cm(86Kr, X), E=493-546 MeV; measured actinide (232Pa-256Fm) yields; deduced optimum reactions.

doi: 10.1103/PhysRevC.33.1315
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2552.


1986SC10      Phys.Rev. C33, 1547 (1986)

M.Schadel, W.Bruchle, M.Brugger, H.Gaggeler, K.J.Moody, D.Schardt, K.Summerer, E.K.Hulet, A.D.Dougan, R.J.Dougan, J.H.Landrum, R.W.Lougheed, J.F.Wild, G.D.O'Kelley

Transfer Cross Sections from Reactions with 254Es as a Target

NUCLEAR REACTIONS, ICPND 254Es(16O, X), E=98 MeV; measured production σ for No, Lr isotopes. 254Es(18O, X)260Md/261Md/260No/261No/262No/261Lr/262Lr/263Lr, E=98 MeV; 254Es(22Ne, X)260Md/261Md/260No/261No/262No/261Lr/262Lr/263Lr, E=127 MeV; measured residual production σ. Activation technique.

doi: 10.1103/PhysRevC.33.1547
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetA0358.


1985LO13      Phys.Rev. C32, 1760 (1985)

R.W.Lougheed, J.H.Landrum, E.K.Hulet, J.F.Wild, R.J.Dougan, A.D.Dougan, H.Gaggeler, M.Schadel, K.J.Moody, K.E.Gregorich, G.T.Seaborg

Search for Superheavy Elements using the 48Ca + 254gEs Reaction

NUCLEAR REACTIONS 254Es(48Ca, X)211At/209At/212Pb, E=240, 249 MeV; measured residuals, superheavy production σ. Aqueous, gas phase separation technique.

doi: 10.1103/PhysRevC.32.1760
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2550.


1985MA14      Nucl.Sci.Eng. 89, 293 (1985); see 1985Ma28

H.T.Maguire, Jr., C.R.S.Stopa, R.C.Block, D.R.Harris, R.E.Slovacek, J.W.T.Dabbs, R.J.Dougan, R.W.Hoff, R.W.Lougheed

Neutron-Induced Fission Cross-Section Measurements of 244Cm, 246Cm, and 248Cm

doi: 10.13182/NSE85-A18621
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset12788.


1985MA28      Nucl.Sci.Eng. 89, 293 (1985)

H.T.Maguire, Jr., C.R.S.Stopa, R.C.Block, D.R.Harris, R.E.Slovacek, J.W.T.Dabbs, R.J.Dougan, R.W.Hoff, R.W.Lougheed

Neutron-Induced Fission Cross-Section Measurements of 244Cm, 246Cm, and 248Cm

NUCLEAR REACTIONS 244,246,248Cm(n, F), E=0.1 eV-80 keV; measured fission σ(E). 245,247,249Cm deduced intermediate structure evidence.

doi: 10.13182/NSE85-A18621
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1985SO03      Phys.Rev. C31, 1801 (1985)

L.P.Somerville, M.J.Nurmia, J.M.Nitschke, A.Ghiorso, E.K.Hulet, R.W.Lougheed

Spontaneous Fission of Rutherfordium Isotopes

RADIOACTIVITY 256Rf(SF) [from 249Cf(12C, 5n), E=85 MeV]; 257Rf(SF) [from 249Cf(12C, 4n), E=75 MeV]; 258Rf(SF) [from 246Cm(16O, 4n), E=95 MeV]; 259Rf(SF) [from 245Cm(18O, 4n), E=93 MeV]; 260Rf(SF) [from 249Bk(15N, 4n), E=80 MeV; 248Cm(16O, 4n), E=92 MeV; 249Cf(16O, 3nα), E=96 MeV]; 262Rf(SF) [from 248Cm(18O, 4n), E=89 MeV; 244Pu(22Ne, 4n), E=113 MeV]; measured T1/2(SF), fission branching. Fast tape system.

NUCLEAR REACTIONS, ICPND 244Pu(22Ne, 4n), E=113 MeV; 248Cm(18O, 4n), E=89 MeV; 249Cf(18O, 3nα), E=96 MeV; 248Cm(16O, 4n), E=92 MeV; 249Bk(15N, 4n), E=80 MeV; 245Cm(18O, 4n), E=93 MeV; 246Cm(16O, 4n), E=95 MeV; 249Cf(12C, 4n), E=75 MeV; 249Cf(12C, 5n), E=85 MeV; measured residual production σ, T1/2(SF), fission branch estimate. Fast tape system.

doi: 10.1103/PhysRevC.31.1801
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1985WI10      Phys.Rev. C32, 488 (1985)

J.F.Wild, P.A.Baisden, R.J.Dougan, E.K.Hulet, R.W.Lougheed, J.H.Landrum

Light-Charged-Particle Emission in the Spontaneous Fission of 250Cf, 256Fm, and 257Fm

RADIOACTIVITY 250Cf, 256Fm, 257Fm(SF); measured σ(Eα) following fission; deduced α-, t-, p-, total light particle emission probabilities.

doi: 10.1103/PhysRevC.32.488
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset12814.


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
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1984HO02      Phys.Rev. C29, 618 (1984)

R.W.Hoff, T.von Egidy, R.W.Lougheed, D.H.White, H.G.Borner, K.Schreckenbach, G.Barreau, D.D.Warner

Levels of 244Cm Populated by the Beta Decay of 10-h 244gAm and 26-min 244mAm

RADIOACTIVITY 244Am(β-); 244mAm(β-), (EC) [from 243Am(n, F), E=thermal]; measured Eγ, Iγ, I(ce). 244Cm deduced levels, J, π, ICC, γ-multipolarity, B(E0)/B(E2).

doi: 10.1103/PhysRevC.29.618
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1984VO07      Phys.Rev. C29, 1243 (1984)

T.von Egidy, R.W.Hoff, R.W.Lougheed, D.H.White, H.G.Borner, K.Schreckenbach, D.D.Warner, G.Barreau, P.Hungerford

Nuclear Structure of 244Am Investigated with the (n, γ) Reaction

NUCLEAR REACTIONS 243Am(n, γ), E=thermal; measured Eγ, Iγ, I(ce). 244Am deduced levels, J, π, rotational bands, Nilsson assignment, K.

doi: 10.1103/PhysRevC.29.1243
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1983HO21      Nucl.Phys. A407, 193 (1983)

R.E.Howe, R.M.White, J.C.Browne, J.H.Landrum, R.J.Dougan, R.W.Lougheed, R.J.Dupzyk

Measurement of the Prompt Fission Neutron Multiplicity from the 245Cm(n, f) and 242mAm(n, f) Reactions

NUCLEAR REACTIONS 245Cm(n, F), E=0.00005-14000 keV; 242mAm(n, F), E=14 MeV; measured prompt fission neutron multiplicity.

doi: 10.1016/0375-9474(83)90314-7
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset12851.


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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1982WI08      Phys.Rev. C26, 1531 (1982)

J.F.Wild, E.K.Hulet, R.W.Lougheed, P.A.Baisden, J.H.Landrum, R.J.Dougan, M.G.Mustafa

Unusually Low Fragment Energies in the Symmetric Fission of 259Md

RADIOACTIVITY 259No(EC), (α) [from 248Cm(18O, 3nα)]; measured α-decay T1/2. 259Md(SF) [from 259No(EC-decay)]; measured T1/2, (fragment)(fragment)-coin; deduced SF-decay upper limit, fragment mass, total kinetic energy distributions.

doi: 10.1103/PhysRevC.26.1531
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1981LO15      J.Inorg.Nucl.Chem. 43, 2239 (1981)

R.W.Lougheed, E.K.Hulet, J.F.Wild, B.J.Qualheim, J.E.Evans, R.J.Dupzyk

Two New Isotopes with N = 157: 256Es and 255Cf

RADIOACTIVITY 256Es, 255Cf [from neutron irradiation of 255Es, 254Cf]; measured β-decay T1/2.

NUCLEAR REACTIONS 255Es, 254Cf(n, γ), E=reactor; measured σ(effective); deduced evidence for 256Es, 255Cf. Enriched targets.

doi: 10.1016/0022-1902(81)80239-4
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset12723.


1981NI01      Nucl.Phys. A352, 138 (1981)

J.M.Nitschke, M.Fowler, A.Ghiorso, R.E.Leber, M.E.Leino, M.J.Nurmia, L.P.Somerville, K.E.Williams, E.K.Hulet, J.H.Landrum, R.W.Lougheed, J.F.Wild, C.E.Bemis, Jr., R.J.Silva, P.Eskola

Search for an 80 ms Spontaneous Fission Activity in Bombardments of 249Bk with 15N

NUCLEAR REACTIONS, Fission 249Bk(15N, X), E=78, 82, 86, 88, 100 MeV; measured σ(E), spontaneous fission T1/2. 260Rf deduced no evidence for 80 ms spontaneous fission decay.

doi: 10.1016/0375-9474(81)90564-9
Citations: PlumX Metrics


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
Citations: PlumX Metrics


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
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset10923.


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
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 dataset10924.


1978IL01      Phys.Lett. 78B, 209 (1978)

J.D.Illige, E.K.Hulet, J.M.Nitschke, R.J.Dougan, R.W.Lougheed, A.Ghiorso, J.H.Landrum

Search for Volatile Superheavy Elements from the Reaction 248Cm + 48Ca

NUCLEAR REACTIONS 248Cm(48Ca, X), E=267 MeV; measured σ for α-, SF-decay fragments; deduced no volatile superheavy elements with T1/2=1 sec-4.17 days.

doi: 10.1016/0370-2693(78)90007-2
Citations: PlumX Metrics


1978LO13      J.Inorg.Nucl.Chem. 40, 1865 (1978)

R.W.Lougheed, J.F.Wild, E.K.Hulet, R.W.Hoff, J.H.Landrum

A New Isotope of Curium and its Decay Properties: 251Cm

RADIOACTIVITY 251Cm [from 250Cm(n, γ)]; measured T1/2, Eγ, Iγ, Qβ-, Eβ. 251Bk deduced levels, J, K, π.

doi: 10.1016/0022-1902(78)80244-9
Citations: PlumX Metrics


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.


1977BE43      Phys.Rev.Lett. 39, 1246 (1977)

C.E.Bemis, Jr., R.L.Ferguson, F.Plasil, R.J.Silva, G.D.O'Kelley, M.L.Klefer, R.L.Hahn, D.C.Hensley, E.K.Hulet, R.W.Lougheed

Mass Asymmetry and Total-Kinetic-Energy Release in the Spontaneous Fission of 262[105]

RADIOACTIVITY, Fission 262Db, 256Fm(SF); measured σ(A), total kinetic energy distributions.

doi: 10.1103/PhysRevLett.39.1246
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 dataset10832.


1977BU14      Phys.Lett. 68B, 122 (1977)

P.A.Butler, I.Y.Lee, J.O.Newton, Y.El-Masri, M.M.Aleonard, P.Colombani, R.M.Diamond, F.S.Stephens, R.W.Lougheed, E.K.Hulet

Fission of 232Th, 238U, 244Pu, 248Cm Induced by Xe and Kr Ions at Coulomb Barrier Energies

NUCLEAR REACTIONS 232Th, 238U, 244Pu, 248Cm(86Kr, F), (136Xe, F), E ≈ Coulomb barrier; measured σ(θ).

doi: 10.1016/0370-2693(77)90181-2
Citations: PlumX Metrics


1977HU04      Phys.Rev.Lett. 39, 385 (1977)

E.K.Hulet, R.W.Lougheed, J.F.Wild, J.H.Landrum, P.C.Stevenson, A.Ghiorso, J.M.Nitschke, R.J.Otto, D.J.Morrissey, P.A.Baisden, B.F.Gavin, D.Lee, R.J.Silva, M.M.Fowler, G.T.Seaborg

Search for Superheavy Elements in the Bombardment of 248Cm with 48Ca

NUCLEAR REACTIONS 248Cm(48Ca, X), E=267 MeV; measured σ for formation of superheavy elements.

doi: 10.1103/PhysRevLett.39.385
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2537.


1974GH04      Phys.Rev.Lett. 33, 1490 (1974)

A.Ghiorso, J.M.Nitschke, J.R.Alonso, C.T.Alonso, M.Nurmia, G.T.Seaborg, E.K.Hulet, R.W.Lougheed

Element 106

NUCLEAR REACTIONS 249Cf(18O, X)263Sg, E=95 MeV; measured reaction products, Eα, Iα; deduced σ.

RADIOACTIVITY 263Sg(α); measured decay products, Eα, Iα; deduced T1/2.

doi: 10.1103/PhysRevLett.33.1490
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2532.


1974RA02      Phys.Rev. C9, 399 (1974)

R.C.Ragaini, E.K.Hulet, R.W.Lougheed, J.Wild

Symmetric Fission in the Neutron-Induced Fission of 255Fm

NUCLEAR REACTIONS 251Cf, 255Fm(n, F), E=thermal; measured E(fragment), deduced fragment mass distribution.

doi: 10.1103/PhysRevC.9.399
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 dataset10393.


1973WI03      J.Inorg.Nucl.Chem. 35, 1063 (1973)

J.F.Wild, E.K.Hulet, R.W.Lougheed

Some Nuclear Properties of Fermium-257

RADIOACTIVITY 257Fm; measured T1/2, α/SF ratio.

doi: 10.1016/0022-1902(73)80176-9
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 dataset10341.


1971HO16      Nucl.Phys. A169, 641 (1971)

R.W.Hoff, E.K.Hulet, R.J.Dupzyk, R.W.Lougheed, J.E.Evans

Alpha Decay of 255Md, 256Md and 257Md

RADIOACTIVITY 255,256,257Md [from 253,254Es(α, xn)]; measured T1/2, Eα, Iα; deduced hindrance factors, α/(α+EC) ratios, lower limit T1/2(SF). 253Es(α, n), (α, 2n), 254Es(α, n), E = 38 MeV; measured relative σ.

doi: 10.1016/0375-9474(71)90708-1
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1971HU03      Phys.Rev. Lett. 26, 523 (1971)

E.K.Hulet, J.F.Wild, R.W.Lougheed, J.E.Evans, B.J.Qualheim, M.Nurmia, A.Ghiorso

Spontaneous-Fission Half-Life of 258Fm and Nuclear Instability

RADIOACTIVITY, Fission 258Fm(SF)[from 257Fm(d, p)]; measured T1/2.

doi: 10.1103/PhysRevLett.26.523
Citations: PlumX Metrics


1971JO13      Phys.Rev.Lett. 27, 45 (1971)

W.John, E.K.Hulet, R.W.Lougheed, J.J.Wesolowski

Symmetric Fission Observed in Thermal-Neutron-Induced and Spontaneous Fission of 257Fm

RADIOACTIVITY, Fission 257Fm(SF); measured (fragment)(fragment)-coin; deduced mass distributions.

NUCLEAR REACTIONS, Fission 257Fm(n, F), E=thermal; measured (fragment)(fragment)-coin; deduced mass distributions.

doi: 10.1103/PhysRevLett.27.45
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14532.


1970HU17      UCRL-72858 (1970)

E.K.Hulet, J.F.Wild, R.W.Lougheed, J.E.Evans, B.J.Qualheim, M.Nurmia, A.Ghiorso

Spontaneous-Fission Half-Life of 258Fm and Nuclear Instability


1970WO14      J.Opt.Soc.Amer. 60, 1297 (1970)

E.F.Worden, R.G.Gutmacher, R.W.Lougheed, J.G.Conway, R.J.Mehlhorn

Hyperfine Structure in the 253Es Emission Spectrum. II. Nuclear Spin, Nuclear Magnetic Dipole Moment, and Energy Levels of Es II

NUCLEAR MOMENTS 253Es; measured a, B; deduced J, μ.

doi: 10.1364/JOSA.60.001297
Citations: PlumX Metrics


1968HO15      Bull.Am.Phys.Soc. 13, No.4, 604, DF6 (1968); Oral Report

R.W.Hoff, E.K.Hulet, R.J.Dupzyk, R.W.Lougheed, J.E.Evans

Alpha Decay of 255Md, 256Md, and 257Md

NUCLEAR STRUCTURE 256Md, 257Md, 255Md; measured not abstracted; deduced nuclear properties.


1968HU06      Bull.Am.Phys.Soc. 13, No.4, 604, DF7 (1968); Oral Report

E.K.Hulet, A.Ghiorso, R.W.Lougheed, J.E.Evans, J.D.Brady, R.W.Hoff, R.E.Stone, B.J.Qualheim

Discovery of 258Md

NUCLEAR STRUCTURE 258Md; measured not abstracted; deduced nuclear properties.


1968LO11      Priv.Comm.(1968)

R.W.Lougheed

NUCLEAR STRUCTURE 255Es, 256Es; measured not abstracted; deduced nuclear properties.


1968WO07      J.Opt.Soc.Am. 58, 998 (1968)

E.F.Worden, R.G.Gutmacher, R.W.Lougheed, J.E.Evans, J.G.Conway

Hyperfine Structure in the 253Es Emission Spectrum

NUCLEAR STRUCTURE 253Es; measured not abstracted; deduced nuclear properties.

doi: 10.1364/JOSA.58.000998
Citations: PlumX Metrics


1966FU13      Phys.Rev. 152, 1046 (1966)

S.C.Fultz, J.T.Caldwell, B.L.Berman, R.L.Bramblett, M.A.Kelly, H.D.Wilson, M.S.Coops, R.W.Lougheed, J.E.Evans, R.W.Hoff

Measurement of the Average Neutron Yield Per Fission for Am-242m

NUCLEAR REACTIONS, Fission 233,235U, 242Am(n, F), E = thermal; measured neutrons/fission.

doi: 10.1103/PhysRev.152.1046
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 dataset12345.


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