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Search: Author = J.M.Nitschke

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1997TO12      Phys.Rev. C56, 3410 (1997)

K.S.Toth, D.C.Sousa, J.C.Batchelder, J.M.Nitschke, P.A.Wilmarth

Decay Properties ¹⁵⁴Tm and Observation of Fine Structure in Its α-Particle Spectrum

RADIOACTIVITY ^154mTm(α)(β⁺)(EC) [from ^92,94Mo(⁶⁴Zn, X), E ≈ 275 MeV]; measured Eγ, Iγ, Eα, Iα, γγ-, γα-coin; deduced isomer α-decay branching ratio. ¹⁵⁰Ho, ¹⁵⁴Er deduced levels.

doi: 10.1103/PhysRevC.56.3410
Citations: PlumX Metrics

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
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2565.

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
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2565.

1995LU10      Phys.Rev. C52, 1348 (1995)

Q.H.Lu, K.Butler-Moore, S.J.Zhu, J.H.Hamilton, A.V.Ramayya, V.E.Oberacker, W.C.Ma, B.R.S.Babu, J.K.Deng, J.Kormicki, J.D.Cole, R.Aryaeinejad, Y.X.Dardenne, M.Drigert, L.K.Peker, J.O.Rasmussen, M.A.Stoyer, S.Y.Chu, K.E.Gregorich, I.Y.Lee, M.F.Mohar, J.M.Nitschke, N.R.Johnson, F.K.McGowan, G.M.Ter-Akopian, Yu.Ts.Oganessian, J.B.Gupta

Structure of ^108,110,112Ru: Identical bands in ^108,110Ru

RADIOACTIVITY ²⁵²Cf(SF); measured Eγ, Iγ, γγ-, γγγ-, (X-ray)γ-coin. ^108,110,112Ru deduced levels, J, π, intraband B(E2) ratios. Rotation-vibration, rigid triaxial rotor calculation.

doi: 10.1103/PhysRevC.52.1348
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1993TO02      Phys.Rev. C47, 1804 (1993)

K.S.Toth, D.C.Sousa, P.A.Wilmarth, J.M.Nitschke, K.S.Vierinen

Electron Capture and β⁺ Decay of ¹⁴⁷Tm

NUCLEAR REACTIONS ⁹²Mo(⁵⁸Ni, X), E=261 MeV; measured γ spectra, γ(annihilation radiation)-coin, X-ray spectra; deduced evidence for ¹⁴⁷Tm.

RADIOACTIVITY ¹⁴⁷Tm(EC), (β⁺), (p); measured γ-spectra, γ(annihilation radiation)-coin, X-ray spectra; deduced (EC+β⁺) strength. ¹⁴⁶Er levels deduced direct proton-decay branch. ¹⁴⁷Er deduced transition.

doi: 10.1103/PhysRevC.47.1804
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1993TO04      Phys.Rev. C48, 436 (1993)

K.S.Toth, D.C.Sousa, J.M.Nitschke, K.S.Vierinen, P.A.Wilmarth

Identification of the s_1/2 ¹⁴⁵Dy Ground State

RADIOACTIVITY ¹⁴⁵Dy(β⁺p), (EC) [from ⁹²Mo(⁵⁸Ni, X), E=283 MeV]; measured β-delayed Ep, Ip, β⁺p-, γp-coin, I(ce). ¹⁴⁵Tb deduced transitions Iγ, γ-multipolarity, I(ce), configuration.

doi: 10.1103/PhysRevC.48.436
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1993TO05      Phys.Rev. C48, 445 (1993)

K.S.Toth, P.A.Wilmarth, J.M.Nitschke, D.C.Sousa

Observation of ¹⁴⁶Er Electron Capture and β⁺ Decay

NUCLEAR REACTIONS ⁹²Mo(⁵⁸Ni, X), E=280 MeV; measured β-delayed (proton)γ-, (proton)(K X-ray)-coin; deduced evidence for ¹⁴⁶Er.

RADIOACTIVITY ¹⁴⁶Er(β⁺p), (EC) [from ⁹²Mo(⁵²Ni, X), E=280 MeV]; measured β-delayed pγ-, (proton)(K X-ray)-coin; deduced T_1/2.

doi: 10.1103/PhysRevC.48.445
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1991FI03      Phys.Rev. C43, 1066 (1991)

R.B.Firestone, J.Gilat, J.M.Nitschke, P.A.Wilmarth, K.S.Vierinen

Decay Studies of Neutron Deficient Nuclei Near the Z = 64 Subshell: ¹⁴²Dy, ^140,142Tb, ^140,142Gd, ^140,142Eu, ¹⁴²Sm, and ¹⁴²Pm

RADIOACTIVITY ¹⁴²Sm, ¹⁴²Pm, ^140,142Eu, ¹⁴²Gd, ^140,142Tb, ¹⁴²Dy [from ⁹²Mo(⁵⁴Fe, xnyp), E=261, 312 MeV; ⁹²Mo(⁵²Cr, xnyp), E=224, 244 MeV]; measured γγ-, γ(X-ray)-coin, (EC)-, (β⁺) branching; deduced Q(EC). ¹⁴²Dy, ^142,140Tb deduced β-delayed proton branching. ¹⁴²Pm, ¹⁴²Sm deduced β⁺-decay emission probabilities. ^142,140Gd, ^142,140Eu, ^142,140Sm, ¹⁴²Tb deduced levels, Iγ. ¹⁴²Nd deduced transition, branching intensity.

doi: 10.1103/PhysRevC.43.1066
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1991TO08      Phys.Rev. C44, 1868 (1991)

K.S.Toth, K.S.Vierinen, M.O.Kortelahti, D.C.Sousa, J.M.Nitschke, P.A.Wilmarth

Investigation of A = 155 and A = 151 Nuclides: Identification of the ¹⁵⁵Tm s_1/2 isomer and the ¹⁵⁵Yb β-decay branch

RADIOACTIVITY ¹⁵⁵Yb, ¹⁵⁵Tm(β⁺), (α); ¹⁵¹Er(β⁺); ¹⁵¹Ho(α); measured T_1/2, γγ-coin, Eγ, Iγ, Eα, Iα; deduced logft, α reduced widths. ¹⁵⁵Tm, ¹⁵⁵Er, ¹⁵¹Ho deduced levels, J, π.

doi: 10.1103/PhysRevC.44.1868
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1991TO09      Z.Phys. A340, 343 (1991)

K.S.Toth, K.S.Vierinen, J.M.Nitschke, P.A.Wilmarth, R.M.Chasteler

Alpha-Decaying Low-Spin Levels in ¹⁵⁵Lu and ¹⁵⁷Lu

RADIOACTIVITY ^155,157Lu [from ^94,96Mo(⁶⁴Zn, 2np)]; measured Eα, Iα, α-decay T_1/2. ¹⁵⁷Lu deduced level.

NUCLEAR REACTIONS ^94,96Mo(⁶⁴Zn, 2np), E not given; measured Eα, Iα.

doi: 10.1007/BF01294685
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1991TO12      Nucl.Instrum.Methods Phys.Res. B56/57, 484 (1991)

K.S.Toth, J.M.Nitschke, K.S.Vierinen, P.A.Wilmarth, R.B.Firestone, M.O.Kortelahti

Spectroscopy of Proton-Rich Nuclei in the Rare Earth Region

NUCLEAR REACTIONS ⁹⁶Ru, ^92,94,95,96Mo, ⁹³Nb(⁶⁴Zn, X), (⁵⁸Ni, X), E not given; measured residuals decay spectra; deduced evidence for neutron deficient isotopes with Z=65-71.

RADIOACTIVITY ¹⁵³Yb, ¹⁴⁹Er(EC), (β⁺); ¹⁵³Tm(α) [from ¹⁵³Yb(β⁺-EC)-decay]; analyzed decay data; deduced s_1/2, h_11/2 states role.

doi: 10.1016/0168-583X(91)96076-W
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1990AK01      Phys.Rev. C41, 1126 (1990)

Y.A.Akovali, K.S.Toth, A.L.Goodman, J.M.Nitschke, P.A.Wilmarth, D.M.Moltz, M.N.Rao, D.C.Sousa

Single-Particle States in ¹⁵¹Tm and ¹⁵¹Er: Systematics of neutron states in N = 83 Nuclei

RADIOACTIVITY ¹⁵¹Yb, ¹⁵¹Tm(β⁺) [from ⁹⁶Ru(⁵⁸Ni, X), E=360 MeV]; measured Eγ, Iγ, γ(t), γγ-coin; deduced log ft. ¹⁵¹Tm, ¹⁵¹Er deduced levels, J, π, T_1/2.

NUCLEAR STRUCTURE ¹³³Sb, ¹³⁵I, ¹³⁷Cs, ¹³⁹La, ¹⁴¹Pr, ¹⁴³Pm, ¹⁴⁵Eu, ¹⁴⁷Tb, ¹⁴⁹Ho, ¹⁵¹Tm, ¹³⁷Xe, ¹³⁹Ba, ¹⁴¹Ce, ¹⁴³Nd, ¹⁴⁵Sm, ¹⁴⁷Gd, ¹⁴⁹Dy, ¹⁵¹Er; calculated single particle state energies. Hartree-Fock-Bogoliubov method.

doi: 10.1103/PhysRevC.41.1126
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1990CH34      Phys.Rev. C42, R1171 (1990)

R.M.Chasteler, J.M.Nitschke, R.B.Firestone, K.S.Vierinen, P.A.Wilmarth

Decay of the Neutron-Rich Isotope ¹⁷¹Ho and the Identification of ¹⁶⁹Dy

RADIOACTIVITY ¹⁷¹Ho, ¹⁶⁹Dy(β^-); measured T_1/2, Eβ, βγ-coin, Iγ, Eγ; deduced log ft, Q. ¹⁷¹Er deduced levels, J, π, ICC. ¹⁶⁹Ho deduced levels, J, π.

doi: 10.1103/PhysRevC.42.R1171
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1990CH37      Phys.Rev. C42, R1796 (1990)

R.M.Chasteler, J.M.Nitschke, R.B.Firestone, K.S.Vierinen, P.A.Wilmarth

Decay Studies of the Neutron-Rich Isotopes ¹⁶⁸Dy and ^168gHo and the Identification of the New Isomer ^168mHo

RADIOACTIVITY ¹⁶⁸Dy, ¹⁶⁸Ho(β^-); ^168mHo(IT); measured T_1/2, Eβ, βγ-coin, Iγ, Eγ; deduced log ft, Q. ¹⁶⁸Ho deduced levels, J, π, ICC.

doi: 10.1103/PhysRevC.42.R1796
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1989CH05      Z.Phys. A332, 239 (1989)

R.M.Chasteler, J.M.Nitschke, R.B.Firestone, K.S.Vierinen, P.A.Wilmarth, A.A.Shihab-Eldin

Identification of the Neutron-Rich Isotope ¹⁷⁴Er

NUCLEAR REACTIONS W(¹⁷⁶Yb, X), E=8.5 MeV/nucleon; measured γ-, X-ray, β-spectra; deduced evidence for ¹⁷⁴Er, ¹⁷¹Ho.

RADIOACTIVITY ¹⁷⁴Er(β^-), ¹⁷¹Ho [from W(¹⁷⁶Yb, X), E=8.5 MeV/nucleon]; measured E(γ), I(γ), X-ray, β-spectra, (X-ray)β-coin. ¹⁷⁴Tm deduced levels, mass. ¹⁷¹Ho deduced T_1/2.

1989FI01      Phys.Rev. C39, 219 (1989)

R.B.Firestone, J.M.Nitschke, P.A.Wilmarth, K.Vierinen, J.Gilat, K.S.Toth, Y.A.Akovali

Decay of ^149g+mEr by Positron and Delayed Proton Emission and by Electron Capture

RADIOACTIVITY ^149,149mEr(β⁺p), (EC), (β⁺) [from ⁵⁸Ni(⁹⁴Mo, n2p), E=259 MeV]; measured Eγ, Iγ, β⁺p-, γγ-coin, β-delayed Ep, Ip; deduced Q(EC), proton separation energy, T_1/2. ¹⁴⁹Ho deduced levels, (EC/β⁺). ¹⁴⁸Dy levels deduced Iγ.

doi: 10.1103/PhysRevC.39.219
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1989GI06      Phys.Rev. C40, 2249 (1989)

J.Gilat, J.M.Nitschke, P.A.Wilmarth, R.B.Firestone

Decay Studies of Neutron-Deficient Nuclei Near the Z = 64 Subshell: ¹⁴¹Dy, ¹⁴¹Tb, ^141,141g+mGd, and ^141mEu

RADIOACTIVITY ¹⁴¹Dy(β⁺p); ¹⁴¹Tb(β⁺), (EC); ^141,141mGd(β⁺), (EC); ^141mEu [from ⁹²Mo(⁵⁴Fe, X), (⁵²Cr, X)]; measured γγ-, γ(X-ray)-coin. ¹⁴¹Eu deduced isomer decay branching ratios, levels, J, π. ¹⁴¹Gd deduced isomer T_1/2, decay features, levels, J, π. ¹⁴¹Dy deduced T_1/2.

doi: 10.1103/PhysRevC.40.2249
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1989KO02      Phys.Rev. C39, 636 (1989)

M.O.Kortelahti, K.S.Toth, K.S.Vierinen, J.M.Nitschke, P.A.Wilmarth, R.B.Firestone, R.M.Chasteler, A.A.Shihab-Eldin

Decay Properties of ¹⁵³Yb and ¹⁵³Tm; Excitation energies of the s_1/2 and h_11/2 proton states in ¹⁵³Tm

RADIOACTIVITY ¹⁵³Yb(β⁺) [from ⁹²Mo(⁶⁴Zn, n2p), E=267 MeV]; ¹⁵³Tm(β⁺), (α) [from ⁹²Mo(⁶⁴Zn, 3p), E=267 MeV]; measured E(γ), I(γ), γ(X-ray)-coin. ¹⁵³Yb level deduced J, π. ¹⁵³Tm deduced levels, J, π, isomer α-decay features. ¹⁵³Er deduced levels, possible J, π, configuration, γ-branching.

doi: 10.1103/PhysRevC.39.636
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1989NI02      Phys.Rev.Lett. 62, 2805 (1989)

J.M.Nitschke, P.A.Wilmarth, R.B.Firestone, P.Moller, K.S.Toth, J.Gilat

Doorway-State Formation and Structure in β-Delayed Proton Decay

RADIOACTIVITY ¹⁵¹Yb, ¹⁴⁹Er, ¹⁴⁷Dy(β⁺p); analyzed β⁺p-coin data; deduced doorway state decay mechanism.

doi: 10.1103/PhysRevLett.62.2805
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1989NI04      Z.Phys. A334, 111 (1989)

J.M.Nitschke, K.S.Toth, K.S.Vierinen, P.A.Wilmarth, R.M.Chasteler

Identification of ¹⁵³Lu β Decay

NUCLEAR REACTIONS ⁹²Mo(⁶⁴Zn, 2np), E=285 MeV; measured γ(X-ray)-, γβ⁺-, γ(particle)-coin, Eγ, Iγ.

RADIOACTIVITY ¹⁵³Lu(β⁺), (EC) [from ⁹²Mo(⁶⁴Zn, 2np), E=285 MeV]; measured γ(X-ray)-, γβ⁺-, γ(particle)-coin, Eγ, Iγ; deduced isomer T_1/2. ¹⁵³Yb deduced transitions, relative Iγ.

1989VI02      Phys.Rev. C39, 1972 (1989)

K.S.Vierinen, J.M.Nitschke, P.A.Wilmarth, R.M.Chasteler, A.A.Shihab-Eldin, R.B.Firestone, K.S.Toth, Y.A.Akovali

Identification of ¹⁴⁵Er and ¹⁴⁵Ho

RADIOACTIVITY ¹⁴⁵Er(β⁺p); ¹⁴⁵Ho(β⁺)(EC) [from ¹⁴⁵Er-decay]; measured Eγ, Iγ, γ(X-ray)-, p(X-ray)-coin; deduced T_1/2. ¹⁴⁵Dy deduced levels, isomer configuration.

doi: 10.1103/PhysRevC.39.1972
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1989VI04      Nucl.Phys. A499, 1 (1989)

K.S.Vierinen, J.M.Nitschke, P.A.Wilmarth, R.B.Firestone, J.Gilat

Decay of Neutron Deficient Eu, Sm and Pm Isotopes Near the Proton Drip Line

RADIOACTIVITY ^134,135,136Eu, ^134,135,136Sm, ^134,135,136Pm(β⁺p) [from ⁹²Mo(⁴⁶Ti, xnyp), E=192-212 MeV mass separated sources]; measured T_1/2, β-delayed Ep, Ip, Eγ; deduced log ft, γγ-, (X-ray)γ-, βγ-, p(X-ray)-, pγ-coin. ^135,136Sm, ^134,135,136Pm, ^134,135,136Nd deduced levels, J, π. n-Ge, planar Ge, plastic scintillator, surface barrier Si(Au) detectors, ΔE-E telescope, enriched targets.

doi: 10.1016/0375-9474(89)90266-2
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1988NI02      Phys.Rev. C37, 2694 (1988)

J.M.Nitschke, P.A.Wilmarth, J.Gilat, K.S.Toth, F.T.Avignone III

Delayed Proton Emission of N = 81 Odd-Odd Precursors: ¹⁴⁸Ho, ¹⁵⁰Tm, and ¹⁵²Lu

RADIOACTIVITY ¹⁴⁸Ho, ¹⁴⁸Er, ¹⁵⁰Tm, ¹⁵²Lu(β⁺p) [from ⁹⁶Ru, ⁹⁴Mo(⁵⁸Ni, xnyp)]; measured Ip, Ep, pγ-, p(X-ray)-, pβ⁺-coin; deduced T_1/2, J, π, isomers, onset of p emission. ¹⁴⁹Ho deduced level energies, proton branching ratios. Statistical model calculations.

doi: 10.1103/PhysRevC.37.2694
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1988TO03      Phys.Rev. C37, 1196 (1988)

K.S.Toth, D.C.Sousa, J.M.Nitschke, P.A.Wilmarth

Beta Decay Properties of ¹⁴⁸Er and ¹⁴⁸Ho

RADIOACTIVITY ¹⁴⁸Er(EC) [from ⁹⁴Mo(⁵⁸Ni, 2n2p), E=257 MeV]; ¹⁴⁸Ho(EC) [from ⁹⁴Mo(⁵⁸Ni, n3p), E=257 MeV]; ¹⁴⁸Dy [from ¹⁴⁸Ho-decay]; measured Eγ, Iγ, γγ-, γ(X-ray)-coin; deduced log ft, T_1/2, J, π. ¹⁴⁸Er, ¹⁴⁸Ho deduced evidence for β-delayed protons. ¹⁴⁸Ho, ¹⁴⁸Dy deduced levels, J, π.

doi: 10.1103/PhysRevC.37.1196
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1988TO13      Phys.Rev. C38, 1932 (1988)

K.S.Toth, P.A.Wilmarth, J.M.Nitschke, R.B.Firestone, K.Vierinen, M.O.Kortelahti, F.T.Avignone III

Fine Structure in ¹⁵³Tm α Decay

RADIOACTIVITY ¹⁵³Tm(α) [from ⁹²Mo(⁶⁴Zn, X), E=285 MeV]; measured Eα, Iα, Eγ, Iγ; deduced level sequence, configuration.

doi: 10.1103/PhysRevC.38.1932
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1988VI02      Phys.Rev. C38, 1509 (1988)

K.S.Vierinen, A.A.Shihab-Eldin, J.M.Nitschke, P.A.Wilmarth, R.M.Chasteler, R.B.Firestone, K.S.Toth

Beta Decay of ¹⁵⁴Lu and ¹⁵⁴Yb

RADIOACTIVITY ¹⁵⁴Lu, ¹⁵⁴Yb(β⁺), (EC) [from ^92,94Mo(⁶⁴Zn, xnyp), E=285 MeV]; measured T_1/2, β-delayed E(α), I(α), E(p), I(p), E(γ), I(γ), I(ce), γγ-, X-ray(γ)-, βγ-coin; deduced log ft. ¹⁵⁴Yb, ¹⁵⁴Tm deduced levels, J, π. n-Ge, planar Ge, plastic scintillator, surface barrier Si detectors, ΔE-E telescope, enriched targets.

doi: 10.1103/PhysRevC.38.1509
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1988WI05      Z.Phys. A329, 503 (1988)

P.A.Wilmarth, J.M.Nitschke, K.Vierinen, K.S.Toth, M.Kortelahti

Beta-Delayed Proton Decay of the N = 83 Precursor ¹⁵³Yb

RADIOACTIVITY ¹⁵³Yb(β⁺), (EC), (β⁺p) [from ⁹²Mo(⁶⁴Zn, X), E=285 MeV]; measured β-delayed Ep, Ip, pγ-, p(X-ray)-coin; deduced delayed proton decay T_1/2, β-strength function. ¹⁵²Er levels deduced p-branching ratios.

1987TO02      Phys.Rev. C35, 310 (1987)

K.S.Toth, D.C.Sousa, J.M.Nitschke, P.A.Wilmarth

Investigation of A = 152 Radioactivities with Mass-Separated Sources: Identification of ¹⁵²Lu

NUCLEAR REACTIONS ⁹⁶Ru(⁵⁸Ni, X), E=354 MeV; measured Eγ, Iγ, γγ-coin; deduced evidence for ¹⁵²Lu.

RADIOACTIVITY ¹⁵²Lu, ¹⁵²Yb, ¹⁵²Tm(EC), (IT) [from ⁹⁶Ru(⁵⁸Ni, X), E=354 MeV]; measured Eγ, Iγ, T_1/2, γγ-coin; deduced log ft.¹⁵²Yb, ¹⁵²Tm deduced levels. ¹⁵²Er deduced levels, α-branching ratio.

doi: 10.1103/PhysRevC.35.310
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1987TO05      Phys.Rev. C35, 620 (1987)

K.S.Toth, D.C.Sousa, J.M.Nitschke, P.A.Wilmarth

Decay Properties of ¹⁵⁰Tm and ¹⁵⁰Er

RADIOACTIVITY ¹⁵⁰Tm, ¹⁵⁰Er(EC), (β⁺) [from ⁹⁶Ru(⁵⁸Ni, X), E=372 MeV]; measured Eγ, Iγ, γγ-coin; deduced log ft. ¹⁵⁰Tm deduced isomer T_1/2, J, π. ¹⁵⁰Er, ¹⁵⁰Ho deduced levels, J, π. Isotope separator.

doi: 10.1103/PhysRevC.35.620
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1987TO12      Phys.Rev. C36, 826 (1987)

K.S.Toth, J.Gilat, J.M.Nitschke, P.A.Wilmarth, K.Vierinen, F.T.Avignone III

Observation of ¹⁴⁹Tm Decay to ¹⁴⁹Er Levels and β-Delayed Proton Emission

NUCLEAR REACTIONS ⁹⁴Mo(⁵⁸Ni, 2np), E=259 MeV; measured Eγ, Iγ, γγ-, γ(X-ray)-coin; deduced evidence for ¹⁴⁹Tm.

RADIOACTIVITY ¹⁴⁹Tm(β⁺), (EC) [from ⁹⁴Mo(⁵⁸Ni, p2n), E=259 MeV]; measured Eγ, Iγ, γγ-, (X-ray)γ-coin, T_1/2; deduced β^--delayed proton precursor character. ¹⁴⁹Er deduced levels, J, π, γ-branching.

doi: 10.1103/PhysRevC.36.826
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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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1986TO12      Phys.Lett. 178B, 150 (1986)

K.S.Toth, Y.A.Ellis-Akovali, J.M.Nitschke, P.A.Wilmarth, P.K.Lemmertz, D.M.Moltz, F.T.Avignone III

Structure in β-Delayed Proton Spectra of N = 81 Precursors

RADIOACTIVITY ¹⁵¹Yb(β⁺p) [from ⁹⁶Ru(⁵⁸Ni, n2p), E=360 MeV]; measured β-delayed Ep, Ip, β⁺p-, pγ-, p(X-ray)-coin. ¹⁵⁰Er deduced levels, J, π, proton branching. Ge, Si detectors, plastic scintillator, on-line separator.

doi: 10.1016/0370-2693(86)91486-3
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1986WI15      Z.Phys. A325, 485 (1986)

P.A.Wilmarth, J.M.Nitschke, R.B.Firestone, J.Gilat

Beta-Delayed Proton Emission in the Lanthanide Region

RADIOACTIVITY ¹²⁴Pr, ¹²⁵Ce, ^127,131Nd, ¹³¹Sm, ¹⁴⁰Tb, ¹⁴¹Gd, ^141,142,144Dy, ^144,146Ho(β⁺p); measured (K X-ray)p-coin, β-delayed (Ep); deduced ground state J, T_1/2. ¹²⁶Ce, ¹³⁰Nd deduced rotational band lowest 2⁺ state. Molybdenum, Ru targets, ³⁶Ar, ⁴⁰Ca, ^54,56Fe, ⁵⁸Ni beams.

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 T_1/2(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, T_1/2(SF), fission branch estimate. Fast tape system.

doi: 10.1103/PhysRevC.31.1801
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1985TO11      Phys.Rev. C32, 342 (1985)

K.S.Toth, Y.A.Ellis-Akovali, F.T.Avignone III, R.S.Moore, D.M.Moltz, J.M.Nitschke, P.A.Wilmarth, P.K.Lemmertz, D.C.Sousa, A.L.Goodman

Single-Particle States in ¹⁴⁹Er and ¹⁴⁹Ho, and the Effect of the Z = 64 Closure

NUCLEAR STRUCTURE ¹³³Sb, ¹³⁵I, ¹³⁷Cs, ¹³⁹La, ¹⁴¹Pr, ¹⁴³Pm, ¹⁴⁵Eu, ¹⁴⁷Tb, ¹⁴⁹Ho, ¹³¹Sn, ¹³³Te, ¹³⁷Ba, ¹³⁹Ce, ¹⁴¹Nd, ¹⁴³Sm, ¹⁴⁵Gd, ¹⁴⁷Dy, ¹⁴⁹Er; calculated single particle states. Hartree-Fock method.

RADIOACTIVITY ¹⁴⁹Er(β⁺), (EC), ^149mEr [from ¹⁴⁴Sm(¹²C, 7n), E=135 MeV]; measured Eγ, Iγ, γγ-coin, T_1/2, β-delayed Ep, Ip. ¹⁴⁹Er deduced levels, J, π, ICC. ¹⁴⁹Ho deduced levels, J, π. Mass separation.

doi: 10.1103/PhysRevC.32.342
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1985WI07      Z.Phys. A321, 179 (1985)

P.A.Wilmarth, J.M.Nitschke, P.K.Lemmertz, R.B.Firestone

Beta-Delayed Proton Precursors with 59 ≤ Z ≤ 62

NUCLEAR REACTIONS ⁹²Mo(⁴⁰Ca, np), (⁴⁰Ca, n2p), (⁴⁰Ca, n3p), E=170 MeV; ⁹⁶Ru(⁴⁰Ca, n3p), (⁴⁰Ca, n2p), E=175 MeV; measured Eγ, Iγ, E X-ray, I X-ray, p(X-ray); deduced β-delayed proton emitters ¹²⁸Pr, ^130,132Pm, ¹²⁹Nd, ¹³³Sm.

RADIOACTIVITY ¹²⁸Pr, ^130,132Pm, ¹²⁹Nd, ¹³³Sm(β⁺p) [from ⁹²Mo, ⁹⁶Ru(⁴⁰Ca, xnyp), E=170, 175 MeV]; measured β-delayed p(X-ray), Eγ, Iγ, E X-ray, I X-ray; deduced T_1/2, average Ep, E(K X-ray), Eγ.

doi: 10.1007/BF01411963
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1984NI03      Z.Phys. A316, 249 (1984)

J.M.Nitschke, P.A.Wilmarth, P.K.Lemmertz, W.-D.Zeitz, J.A.Honkanen

Beta-Delayed Proton Emission Observed in New Lanthanide Isotopes

RADIOACTIVITY ^143,141Dy(β⁺p) [from ⁹²Mo(⁵⁶Fe, αn), (⁵⁴Fe, αn), E=275, 274 MeV]; ¹⁴¹Gd(β⁺p) [from ⁹²Mo(⁵⁴Fe, n4p), E=274 MeV]; ¹²³Ce(β⁺p) [from ⁹²Mo(³⁶Ar, nα), E=196 MeV]; ¹²²La(β⁺p) [from ⁹²Mo(³⁶Ar, npα), E=205 MeV]; ¹²⁰La(β⁺p) [from ⁵⁸Ni(⁶⁴Zn, np), E=253 MeV]; measured β-delayed Ep, Ip, γp-, X-ray p-coin; deduced T_1/2.

doi: 10.1007/BF01412274
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1983NI01      Nucl.Instrum.Methods 206, 341 (1983)

J.M.Nitschke

OASIS: The superhilac on-line isotope separator

NUCLEAR REACTIONS ¹⁴⁴Sm(²⁰Ne, xnyp)¹⁵⁶Yb/¹⁵⁵Yb/¹⁵⁴Yb/¹⁵²Er/¹⁵³Er/¹⁵⁴Er/¹⁵²Ho/¹⁵¹Ho/¹⁵³Ho/¹⁵⁴Tm/¹⁵⁵Tm/¹⁵⁶Tm/¹⁵⁶Lu, E=168 MeV; measured evaporation residue α-spectra; deduced daughter residuals production.

doi: 10.1016/0167-5087(83)90367-8
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1983NI05      Z.Phys. A312, 265 (1983)

J.M.Nitschke, M.D.Cable, W.-D.Zeitz

New Beta-Delayed Proton Emitters in the Lanthanide Region

NUCLEAR REACTIONS ⁹⁰Zr(⁴⁰Ca, npα), (⁴⁰Ca, nα), E=196 MeV; ⁹⁰Zr(⁴⁰Ca, 3np), E=182 MeV; ⁹²Mo(⁴⁰Ca, α), E=188 MeV; ⁹²Mo(⁴⁰Ca, nα), E=213 MeV; ⁵⁰Cr(⁹²Mo, nα), E=480 MeV; ⁵⁰Cr(⁹²Mo, n2p), E=385 MeV; ⁹²Mo(⁵⁸Ni, n2pα), E=292 MeV; ⁹²Mo(⁵⁶Fe, nα), E=275 MeV; measured β-delayed proton activity; deduced evidence for precursors ¹²⁴La, ¹²⁶Pr, ^127,128Nd, ^137,139Gd, ¹⁴³Dy.

RADIOACTIVITY ¹²⁵Ce, ¹²⁶Pr, ^127,128Nd, ^137,139Gd(β⁺p) [from ⁹²Mo, ⁹⁰Zr, ⁵⁴Fe, ⁵⁰Cr(⁹²Mo, xnypzα), (⁵⁸Ni, xnypzα), (⁵⁶Fe, xnypzα), (⁴⁰Ca, xnypzα)]; measured β-delayed proton activity, < Ep >; deduced T_1/2.

doi: 10.1007/BF01412173
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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 ^{244,246,248,250,251}Bk, ^{246,248,250,251,252,253,254}Cf, ^{252,253,254,255,256}Es, ^{252,253,254,255,256}Fm, ^{255,256,257,258}Md; deduced dominant transfer reaction deexcitation channel.

doi: 10.1103/PhysRevLett.48.852
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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 T_1/2. ²⁶⁰Rf deduced no evidence for 80 ms spontaneous fission decay.

doi: 10.1016/0375-9474(81)90564-9
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1979NI01      Nucl.Phys. A313, 236 (1979)

J.M.Nitschke, R.E.Leber, M.J.Nurmia, A.Ghiorso

Observations in the Reactions of Two Magic Nuclei: ²⁰⁸Pb and ⁴⁸Ca

NUCLEAR REACTIONS ²⁰⁸Pb(⁴⁸Ca, xn), ²⁰⁸Pb(⁴⁰Ar, xn), E(cm)=160-200 MeV; measured σ(E), transfer reaction products; deduced angular momentum, tunneling effects.

doi: 10.1016/0375-9474(79)90578-5
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1978BA44      Phys.Rev.Lett. 41, 738 (1978)

P.A.Baisden, R.E.Leber, M.Nurmia, J.M.Nitschke, M.Michel, A.Ghiorso

Isomeric States in ²¹²Bi

RADIOACTIVITY ^212,212mBi; measured T_1/2, Eα.

doi: 10.1103/PhysRevLett.41.738
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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 T_1/2=1 sec-4.17 days.

doi: 10.1016/0370-2693(78)90007-2
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1978OT03      J.Inorg.Nucl.Chem. 40, 589 (1978)

R.J.Otto, D.J.Morrissey, D.Lee, A.Ghiorso, J.M.Nitschke, G.T.Seaborg, M.M.Fowler, R.J.Silva

A Search for Superheavy Elements with Half-Lives between a Few Minutes and Several Hundred Days, Produced in the ⁴⁸Ca + ²⁴⁸Cm Reaction

NUCLEAR REACTIONS ²⁴⁸Cm(⁴⁸Ca, X), E=255 MeV; measured SF activity; deduced no superheavy yield.

doi: 10.1016/0022-1902(78)80372-8
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2537.

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
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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 T_1/2.

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.

1972TR01      Phys.Rev. C5, 222 (1972)

B.L.Tracy, J.Chaumont, R.Klapisch, J.M.Nitschke, A.M.Poskanzer, E.Roeckl, C.Thibault

Rb and Cs Isotopic Cross Sections from 40-60-Mev-Proton Fission of ²³⁸U, ²³²Th, and ²³⁵U

NUCLEAR REACTIONS, Fission ²³²Th, ^235,238U(p, F), E=40-60 MeV; measured σ(E), Rb, Cs isotopic mass distributions; deduced average neutron number.

doi: 10.1103/PhysRevC.5.222
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetO0005.

1971TR02      Phys.Lett. 34B, 277 (1971)

B.L.Tracy, J.Chaumont, R.Klapisch, J.M.Nitschke, A.M.Poskanzer, E.Roeckl, C.Thibault

Half-Lives of the New Isotopes ⁹⁹Rb, ⁹⁸Sr and ^145-146Cs

RADIOACTIVITY ^96,97,98,99Rb, ^98,97Sr, ^97,98Y, ^145,146Cs; measured T_1/2.

doi: 10.1016/0370-2693(71)90603-4
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1966HY02      UCRL-16580, p.88 (1966)

E.K.Hyde, J.M.Nitschke

The Radiations of 1.9-Hour Nb⁸⁹

RADIOACTIVITY ⁸⁹Nb [from ⁸¹Br(¹²C, 4n)]; measured T_1/2, Eγ. Ge(Li) detector, pair spectrometer.

1966HY03      UCRL-16580, p.87 (1966)

E.K.Hyde, J.M.Nitschke

Radiations of 14-Minute Nb⁸⁸

RADIOACTIVITY ⁸⁸Nb; measured Eγ. Ge(Li) detector.