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Search: Author = J.Borggreen

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1990DR06      Nucl.Phys. A515, 466 (1990)

M.W.Drigert, M.Piiparinen, R.V.F.Janssens, R.Holzmann, I.Ahmad, J.Borggreen, R.R.Chasman, P.J.Daly, B.K.Dichter, H.Emling, U.Garg, Z.W.Grabowski, T.L.Khoo, W.C.Ma, M.Quader, D.C.Radford, W.Trzaska

Discrete and Continuum Gamma-Ray Studies of 147Gd and 148Gd

NUCLEAR REACTIONS 116Cd(36S, 5n), (36S, 4n), E=170 MeV; measured Eγ, Iγ, γγ(θ), γγ-correlations, Doppler shifts. 147,148Gd deduced levels, J, π, band structure, deformation. Enriched target, Compton-suppressed Ge-detectors, central array of BGO hexagons.

doi: 10.1016/0375-9474(90)90594-C
Citations: PlumX Metrics


1990WA09      Phys.Rev.Lett. 65, 416 (1990)

P.M.Walker, G.Sletten, N.L.Gjorup, M.A.Bentley, J.Borggreen, B.Fabricius, A.Holm, D.Howe, J.Pedersen, J.W.Roberts, J.F.Sharpey-Schafer

High-K Barrier Penetration in 174Hf: A challenge to K selection

NUCLEAR REACTIONS 130Te(48Ca, 4n), E ≈ 198 MeV; measured γγ-coin. 174Hf deduced levels, J, π, isomer decay features, band structure.

doi: 10.1103/PhysRevLett.65.416
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1988CH27      Nucl.Phys. A485, 136 (1988)

P.Chowdhury, B.Fabricius, C.Christensen, F.Azgui, S.Bjornholm, J.Borggreen, A.Holm, J.Pedersen, G.Sletten, M.A.Bentley, D.Howe, A.R.Mokhtar, J.D.Morrison, J.F.Sharpey-Schafer, P.M.Walker, R.M.Lieder

Decay of High-Spin Isomers in Os Nuclei by Barrier Penetration

NUCLEAR REACTIONS 150Nd(36S, 4n), E=160 MeV; 170Er(18O, 4n), E=85 MeV; measured E(γ), I(ce), I(γ), γγ-coin, I(γ)(θ). 182,184Os deduced levels, J, π, K, g(K), configurations, T1/2. Ge-multi-array, Compton shields, pulsed beam, recoil technique.

doi: 10.1016/0375-9474(88)90526-X
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1988DR01      Phys.Lett. 201B, 223 (1988)

M.W.Drigert, R.V.F.Janssens, R.Holzmann, R.R.Chasman, I.Ahmad, J.Borggreen, P.J.Daly, B.K.Dichter, H.Emling, U.Garg, Z.W.Grabowski, T.L.Khoo, W.C.Ma, M.Piiparinen, M.Quader, D.C.Radford, W.Trzaska

Evidence for Superdeformation in 148Gd

RADIOACTIVITY 148Gd(α) [from 116Cd(36S, 4n), E=170 MeV]; measured Eγ, Iγ, γγ-coin, energy correlations. 148Gd deduced moment of inertia superdeformation. Compton suppressed Ge detectors. Cranked Strutinsky calculations.

NUCLEAR STRUCTURE 146,147,148,150,151,152,153,154,155,156Er, 145,147,148,149,150,151,152,153,154,155Ho, 144,145,146,147,148,149,150,151,152,153Dy, 143,144,145,146,147,148,149,150,151,152,153Tb, 142,143,144,145,146,147,148,149,150,151,152Gd, 141,142,143,144,145,146,147,148,149,150,151Eu, 140,141,142,143,144,145,146,147,148,149,150Sm, 139,140,141,142,143,144,145,146,147,148,149Pm, 138,139,140,141,142,143,144,145,146,147,148Pr, 138,139,140,141,142,143,144,145,146,147,148Nd; calculated moments of inertia. 148Gd deduced superdeformation evidence. Cranked Strutinsky model.

doi: 10.1016/0370-2693(88)90217-1
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1987BO10      Nucl.Phys. A466, 371 (1987)

J.Borggreen, G.Sletten, S.Bjornholm, J.Pedersen, A.Del Zoppo, D.C.Radford, R.V.F.Janssens, P.Chowdhury, H.Emling, D.Frekers, T.L.Khoo

Single Particle Radiation between High Spin States in 147Gd

NUCLEAR REACTIONS 122Sn(30Si, 5n), E=153 MeV; measured γγ-coin, Iγ(θ), recoil distance. 147Gd deduced levels, J, π, T1/2, configurations. Ge detectors, NaI array, plunger, bunched beam.

doi: 10.1016/0375-9474(87)90447-7
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1987PI07      Phys.Lett. 194B, 468 (1987)

M.Piiparinen, M.W.Drigert, R.V.F.Janssens, I.Ahmad, J.Borggreen, R.R.Chasman, P.J.Daly, B.K.Dichter, H.Emling, U.Garg, Z.W.Grabowski, R.Holzmann, T.L.Khoo, W.C.Ma, M.Quader, D.C.Radford, W.Trzaska

Level Structure of 148Gd up to I = 44

NUCLEAR REACTIONS 116Cd(36S, 4n), E=170 MeV; measured Eγ, Iγ, γγ-coin. 148Gd deduced levels, J, π, γ-branching, γ multipolarity, configurations. Compton suppressed Ge spectrometer array.

doi: 10.1016/0370-2693(87)90218-8
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1985BO37      Nucl.Phys. A443, 120 (1985)

J.Borggreen, G.Sletten, S.Bjornholm, J.Pedersen, R.V.F.Janssens, I.Ahmad, P.Chowdhury, T.L.Khoo, Y.H.Chung, P.J.Daly

Nuclear Structure Effects in the Feeding of Yrast States of Gd, Dy and Er Nuclei

NUCLEAR REACTIONS 120,122,124Sn(30Si, xn), E=145, 153 MeV; 130Te(30Si, xn), E=137 MeV; 118,120,122,124Sn(34S, xn), E=155-165 MeV; 122,124,126,128,130Te(34S, xn), E=155, 170 MeV; measured Iγ. 146,147,148,149Gd, 148,150,151,152,154,155,156Dy, 152,153,154,155,156,157,158,159,160Er deduced yrast population. Ge detector, NaI array.

doi: 10.1016/0375-9474(85)90324-0
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1985PE01      Phys.Rev.Lett. 54, 306 (1985)

J.Pedersen, B.B.Back, S.Bjornholm, J.Borggreen, M.Diebel, G.Sletten, F.Azgui, H.Emling, H.Grein, G.Seiler-Clark, W.Spreng, H.J.Wollersheim, P.Walker, S.Aberg

Population of Triaxial Rotor Levels in 182Os

NUCLEAR REACTIONS 48Ca, 48,50Ti(136Xe, X), E=4.3-4.8 MeV/nucleon; measured Eγ, Iγ. 182Os deduced isomer, J, T1/2, decay characteristics, K selection rule violation, yrast configuration triaxiality.

doi: 10.1103/PhysRevLett.54.306
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1985PE07      Z.Phys. A321, 567 (1985)

J.Pedersen, B.B.Back, S.Bjornholm, J.Borggreen, G.Sletten, F.Azgui, H.Emling, H.Grein, G.Seiler-Clark, W.Spreng, H.J.Wollersheim, P.Walker

High-Spin Isomers in W and Os Nuclei; Competition between K-quantization and triaxiality

NUCLEAR REACTIONS 48Ca, 48,50Ti(136Xe, X), E=584-647 MeV; measured Eγ, Iγ, γ(t). 178,180W, 182,183,180Os deduced levels, K, J, π, γ-branching, isomers.

doi: 10.1007/BF01432431
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1984SL03      Phys.Lett. 135B, 33 (1984)

G.Sletten, S.Bjornholm, J.Borggreen, J.Pedersen, P.Chowdhury, H.Emling, D.Frekers, R.V.F.Janssens, T.L.Khoo, Y.H.Chung, M.Kortelahti

Nucleon Alignment to very High Spins in 147Gd: Rapid ' rotation ' of fermion system

NUCLEAR REACTIONS 122Sn(30Si, 5n), E=153 MeV; measured Eγ, Iγ, γ(θ). 147Gd deduced levels, γ-branching, J, π, yrast sequence, configuration, fermion system rotation evidence.

doi: 10.1016/0370-2693(84)90448-9
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1983KH03      Phys.Scr. T5, 16 (1983)

T.L.Khoo, P.Chowdhury, H.Emling, D.Frekers, R.V.F.Janssens, W.Kuhn, A.Pakkanen, Y.H.Chung, P.J.Daly, Z.W.Grabowski, H.Helppi, M.Kortelahti, S.Bjornholm, J.Borggreen, J.Pedersen, G.Sletten

Nuclear Shape Transitions and Some Properties of Aligned-Particle Configurations at High Spin

NUCLEAR STRUCTURE 148,152,156,160Dy, 147Gd; analyzed high-spin state, effective quadrupole moment, feeding times data; deduced shape dependence on spin, neutron number.

NUCLEAR REACTIONS 122Sn(30Si, 5n), E not given; measured γγ-coin. 147Gd deduced levels, γ-branching.

doi: 10.1088/0031-8949/1983/T5/003
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1983PE13      Phys.Scr. T5, 162 (1983)

J.Pedersen, S.Bjornholm, J.Borggreen, J.Kownacki, G.Sletten

Intrinsic Excitations as Yrast Structures in 179W above I ≈ (35/2)(h-bar)

NUCLEAR REACTIONS 170Er(13C, 4n), E=61-65 MeV; measured γγ-coin. 179W deduced levels, isomer T1/2, yrast band, J, π, K, configurations, deformation aligned state dominance, high-spin degeneracy.

doi: 10.1088/0031-8949/1983/T5/030
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1982BA46      Nucl.Phys. A389, 93 (1982)

O.Bakander, C.Baktash, J.Borggreen, J.B.Jensen, J.Kownacki, J.Pedersen, G.Sletten, D.Ward, H.R.Andrews, O.Hausser, P.Skensved, P.Taras

Co-Existence of Spherical and Oblate Configurations in 147Gd

NUCLEAR REACTIONS 135Ba(16O, 4n), E=77-84 MeV; 124Sn(28Si, 5n), E=128-140 MeV; measured γγ-coin, Iγ(θ), I(ce). 147Gd deduced levels, J, π, isomer T1/2, reduced transition probabilities. Pulsed beam, Ge(Li), Si(Li) detectors, NaI(Tl) array, mini-orange spectrometer.

doi: 10.1016/0375-9474(82)90293-7
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1982FI15      Nucl.Phys. A389, 218 (1982)

C.A.Fields, K.H.Hicks, R.A.Ristinen, F.W.N.De Boer, P.M.Walker, J.Borggreen, L.K.Peker

A Study of the Rotational Side-Bands in 162Dy

NUCLEAR REACTIONS 160Gd(α, 2n), E=24, 28 MeV; measured E(γ), I(γ)(E, t, θ), γγ-coin, ICC. 162Dy deduced levels, K, J, π. Enriched targets, Ge(Li), hyperpure Ge detectors, mini-orange spectrometer. Two-quasiparticle plus rotor analysis.

doi: 10.1016/0375-9474(82)90517-6
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1982LI04      Nucl.Phys. A375, 291 (1982)

R.M.Lieder, G.Sletten, J.Borggreen, J.Pedersen

Study of Band Crossings in 182Os

NUCLEAR REACTIONS 168Er(18O, xnγ), E=81 MeV; measured Eγ, Iγ, σ(Eγ, θ), γγ-coin, I(ce) for x=4, 5. 181,182Os deduced levels, J, π, ICC, δ, γ-branching. Enriched targets, Ge(Li), Si-Li and NaI(Tl) detectors, mini-orange conversion electron spectrometer.

doi: 10.1016/0375-9474(82)90413-4
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1982PA10      Phys.Rev.Lett. 48, 1530 (1982)

A.Pakkanen, Y.H.Chung, P.J.Daly, S.R.Faber, H.Helppi, J.Wilson, P.Chowdhury, T.L.Khoo, I.Ahmad, J.Borggreen, Z.W.Grabowski, D.C.Radford

Transition from Collective to Aligned-Particle Configurations at High Spin in 154Dy

NUCLEAR REACTIONS 124Sn(34S, 4n), E=145-165 MeV; measured γγ-coin, γ(θ), σ(Eγ), recoil. 154Dy deduced levels, J, π, γ-branching, T1/2, yrast level intrinsic quadrupole moments, backbending, shape change.

doi: 10.1103/PhysRevLett.48.1530
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1981CH19      Phys.Rev.Lett. 47, 778 (1981)

P.Chowdhury, J.Borggreen, T.L.Khoo, I.Ahmad, R.K.Smither, S.R.Faber, P.J.Daly, C.L.Dors, J.Wilson

Feeding of High-Spin Particle Yrast States by Collective Structures in the Continuum

NUCLEAR REACTIONS 122Sn(34S, 4n), E=144-184 MeV; measured σ(Eγ, E), γ-multiplicity; deduced continuum cascade, collective effects. 152Dy deduced yrast level population vs J, stretched dipole, quadrupole continuum γ components. NAI detector.

doi: 10.1103/PhysRevLett.47.778
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1981KH02      Phys.Scr. 24, 283 (1981)

T.L.Khoo, J.Borggreen, P.Chowdhury, I.Ahmad, R.K.Smither, S.R.Faber, P.J.Daly, C.L.Dors, J.Wilson

Very High Spin Yrast States and the Link to the Continuum

NUCLEAR REACTIONS 122Sn(34S, 4n), E=144, 151, 160, 168, 176, 184 MeV; measured γγ-coin, γ-multiplicity; deduced stretched quadrupole, dipole γ-continuum components. 152Dy deduced yrast transition relative population intensity.

doi: 10.1088/0031-8949/24/1B/024
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1981WA14      Nucl.Phys. A365, 61 (1981)

P.M.Walker, W.H.Bentley, S.R.Faber, R.M.Ronningen, R.B.Firestone, F.M.Bernthal, J.Borggreen, J.Pedersen, G.Sletten

Rotational Bands in 170Yb Observed following (α, xn) Reactions

NUCLEAR REACTIONS 168Er(α, 2n), E=27 MeV; 170Er(α, 4n), E=50 MeV; measured Eγ, Iγ, γγ-coin, αγ(t), γ(θ), ICC. 170Yb deduced levels, K, J, π, T1/2, rotational bands. Ge detector, Ge(Li), Si-Li detectors, enriched targets.

doi: 10.1016/0375-9474(81)90387-0
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1980BO07      Z.Phys. A294, 113 (1980)

J.Borggreen, S.Bjornholm, O.Christensen, A.Del Zoppo, B.Herskind, J.Pedersen, G.Sletten, F.Folkmann, R.S.Simon

Gamma-Spectroscopy within the Island of High-Spin Isomers Near N=82

NUCLEAR REACTIONS 106Pd, 100Mo(50Ti, xnγ), (65Cu, xnγ), E=4.6 MeV/nucleon; measured Eγ, Iγ, γ(t), sum spectra. 144,147Gd, 148Tb, 151,152Dy, 149,150,151,152,153Ho, 151,152,153,154Er deduced levels, T1/2, J, π.

doi: 10.1007/BF01435046
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1980WI11      Z.Phys. A296, 185 (1980)

J.Wilson, S.R.Faber, P.J.Daly, I.Ahmad, J.Borggreen, P.Chowdhury, T.L.Khoo, R.D.Lawson, R.K.Smither, J.Blomqvist

The πh311/2 Spectrum in the Three Valence Proton Nucleus 14967Ho82

NUCLEAR REACTIONS 121Sb, 122Te(32S, xnyp), E=155-180 MeV; measured Eγ, Iγ, γγ-coin, γγ(t). 149Ho deduced levels, T1/2, J, π, γ-multipolarity, configuration. Enriched targets.

doi: 10.1007/BF01412660
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1979DO02      Nucl.Phys. A314, 61 (1979)

C.L.Dors, F.M.Bernthal, T.L.Khoo, C.H.King, J.Borggreen, G.Sletten

High-Spin Rotational Levels in 178W Populated in the 177Hf(α3nγ) Reaction

NUCLEAR REACTIONS 177Hf(α, 3n), E=38 MeV; measured Eγ, Iγ(θ), Eγ versus Eα, γγt-coin, αγ-delay. 178W deduced levels, J, π, K, T1/2, multipolarities. Ge(Li) detectors. Enriched target.

doi: 10.1016/0375-9474(79)90555-4
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1978BE15      Phys.Lett. 74B, 211 (1978)

F.Bernthal, B.B.Back, O.Bakander, J.Borggreen, J.Pedersen, G.Sletten, H.Beuscher, D.Haenni, R.Lieder

Connection between Backbending and High-Spin Isomer Decay in 179W

NUCLEAR REACTIONS 170Er(13C, 4nγ), E not given; 180Hf(α, 5nγ), E=58 MeV; measured γ(t), γγ(t). 179W deduced levels, J, π, T1/2.

doi: 10.1016/0370-2693(78)90555-5
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1977BO09      Nucl.Phys. A279, 189 (1977)

J.Borggreen, J.Pedersen, G.Sletten, R.Heffner, E.Swanson

The Rotational Band of the 236U Shape Isomer

NUCLEAR REACTIONS 235U(d, p), E=12 MeV; measured ce-delayed fission coin, pce-coin. 236mU deduced rotational constant.

doi: 10.1016/0375-9474(77)90222-6
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1977PE15      Phys.Rev.Lett. 39, 990 (1977)

J.Pedersen, B.B.Back, F.M.Bernthal, S.Bjornholm, J.Borggreen, O.Christensen, F.Folkmann, B.Herskind, T.L.Khoo, M.Neiman, F.Puhlhofer, G.Sletten

Island of High-Spin Isomers Near N = 82

NUCLEAR STRUCTURE 146,147Gd; measured reaction γ-multiplicities, delayed S-width; deduced T1/2 of high spin isomers.

doi: 10.1103/PhysRevLett.39.990
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1976AN11      Nucl.Phys. A269, 338 (1976)

V.Andersen, C.J.Christensen, J.Borggreen

The Shape Isomer in 236U Populated by Thermal Neutron Capture

NUCLEAR REACTIONS 235U(n, γ), E=th; measured ce X-coin, fragment delay; obtained isomeric/prompt fission ratio. 236mU shape isomer deduced γ/F branching ratio.

doi: 10.1016/0375-9474(76)90685-0
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1974BO02      Nucl.Phys. A218, 621 (1974)

J.Borggreen, J.Hattula, E.Kashy, V.Maarbjerg

Search for a γ-Branch from Shape Isomers in 236U and 238Np

NUCLEAR REACTIONS 235U(d, p), E=11 MeV; 238U(p, n), E=8 MeV; measured σ(delayed γ), T1/2=130 ns, 2 μs < T1/2 < 20 ms. 236mU, 238mNp deduced limits on σ for delayed γ from shape isomer.

doi: 10.1016/0375-9474(74)90044-X
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1974FO24      Nucl.Instrum.Methods 119, 117 (1974)

F.Folkmann, J.Borggreen, A.Kjeldgaard

Sensitivity in Trace-Element Analysis by p, α and 16O Induced X-Rays

NUCLEAR REACTIONS Cu, Y, In, Nd, Tm, Pd(p, p), (α, α), (16O, 16O), E=3, 5 MeV/amu; measured σ(K, L X-rays).

doi: 10.1016/0029-554X(74)90740-X
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1972KA59      Comment.Phys.-Math. 42, 266 (1972)

E.Kashy, J.Hattula, J.Borggreen, V.Maarbjerg

Search for γ-Branch in the 236mU Fission Isomer Decay

RADIOACTIVITY 236mU; measured upper limit for γ-ray decay.


1971BO06      Nucl.Phys. A162, 407 (1971)

J.Borggreen, E.K.Hyde

Alpha Decay of Neutron-Deficient Osmium Isotopes

NUCLEAR REACTIONS 164Er(16O, xn)172Os/173Os/174Os, E=90-154 MeV; measured σ(E). Enriched target.

RADIOACTIVITY 172,173,174Os; measured Eα, T1/2; deduced Qα, α/(EC+β+).

doi: 10.1016/0375-9474(71)90994-8
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1970BJ02      Nucl.Phys. A156, 561 (1970)

S.Bjornholm, J.Borggreen, E.K.Hyde

Search for New Islands of Fission Isomerism

NUCLEAR REACTIONS 197Au(HI, X), E=5-10 MeV/nucleon for HI=11B, 12C, 14N, 16O; measured σ(E) for SF-isomers. 200,201,202,203,204Po, 201,202,203,204,205At, 202,203,204,205,206,207Rn, 202,203,204,205,206,207,208,209,210Fr deduced no SF-isomer (σ < 0.1 μb) with 2ns < T1/2<2000s.

doi: 10.1016/0375-9474(70)90252-6
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1970BO02      Nucl.Phys. A143, 255 (1970)

J.Borggreen, G.Sletten

Isomeric States in Odd-N Isotopes of Sm, Gd, Dy and Er Ascribed to the 11/2- [505] Nilsson Configuration

NUCLEAR REACTIONS 148Nd, 152Sm(α, n), E=18 MeV; 153Eu(d, 2n), E=12 MeV; 155,157Gd, 161Dy(3He, 3n), E = 20 MeV; measured Eγ, Iγ, I(ce), γ-delay, ce-delay. 151Sm, 153,155Gd, 155,157Dy, 161Er deduced levels, T1/2, J, π, ICC, γ-multipolarity. Enriched targets, Ge(Li) detector.

doi: 10.1016/0375-9474(70)90562-2
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1970BO13      Phys.Rev. C2, 1841 (1970)

J.Borggreen, K.Valli, E.K.Hyde

Production and Decay Properties of Protactinium Isotopes of Mass 222 to 225 Formed in Heavy-Ion Reactions

RADIOACTIVITY 222,223,224,225Pa, 218,219,220,221Ac, 215,216,217Fr, 213At; measured T1/2, Eα, Iα; deduced hindrance factors, Q.

doi: 10.1103/PhysRevC.2.1841
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1970VA13      Phys.Rev. C1, 2115 (1970)

K.Valli, E.K.Hyde, J.Borggreen

Production and Decay Properties of Thorium Isotopes of Mass 221-224 Formed in Heavy-Ion Reactions

RADIOACTIVITY 228U, 224Th, 220Ra, 216Rn, 227U, 223Th, 219Ra, 215Rn, 211Po, 222Th, 218Ra, 214Rn, 221Th, 217Ra, 213Rn; measured Eα, T1/2; deduced Q, α-branching.

doi: 10.1103/PhysRevC.1.2115
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1969BO17      Nucl.Phys. A131, 241 (1969)

J.Borggreen, G.Lovhoiden, J.C.Waddington

Mixing of the Positive Parity States in 155Gd

NUCLEAR STRUCTURE 155Gd; calculated levels, quadrupole moment, μ, σ(d, t) for 156Gd(d, t).

doi: 10.1016/0375-9474(69)90533-8
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1968BJ04      Yadern.Fiz. 8, 459 (1968); Soviet J.Nucl.Phys. 8, 267 (1969)

S.Bjornholm, I.Borggreen, Y.P.Gangrskii, G.Sletten

Investigation of (d, p) and (d, t) Reactions Leading to Spontaneously Fissile Isomeric States

NUCLEAR REACTIONS 241,243Am(d, p), (d, t), E=9-13 MeV; measured σ(E); deduced isomeric ratio.


1968BJ06      Nucl.Phys. A118, 261(1968)

S.Bjornholm, J.Borggreen, D.Davies, N.J.S.Hansen, J.Pedersen, H.L.Nielsen

Energy Levels in 234U Populated in the β-Decay of 234Pa(UZ)

RADIOACTIVITY 234Pa [from 238U decay]; measured Eγ, Eβ, Iγ, I(ce), Iβ, βγ-, γγ-, ceγ-coin, γγ-delay. 234U deduced levels, J, π. Ge(Li) detector.

doi: 10.1016/0375-9474(68)90337-0
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1968BO18      Nucl.Phys. A113, 659 (1968)

J.Borggreen, J.P.Gjaldbaek

Note on the Decay of the 115-μs Isomer in 159Dy

RADIOACTIVITY 159mDy[from 159Tb(d, 2n)]; measured Eγ, Iγ, I(ce), γγ-, γce-coin. 159Dy deduced levels, J, π. Ge(Li) detector.

doi: 10.1016/0375-9474(68)90174-7
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1968BO22      Nucl.Phys. A115, 14 (1968)

J.Borggreen, R.A.Naumann

M2 Isomer in 199Au

RADIOACTIVITY 199mAu [from 198Pt(d, n)]; measured T1/2, Eγ. 199Au deduced levels, γ-multipolarity, mixing ratio. Enriched target.

doi: 10.1016/0375-9474(68)90638-6
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1967AN04      Nucl.Phys. A102, 241 (1967)

A.Andreeff, R.Kastner, P.Manfrass, M.Bonitz, J.Borggreen, N.J.Sigurd Hansen

The ±-Forbidden Decay of the 4.1 μs Isomeric State in 170Tm

NUCLEAR REACTIONS 169Tm(n, γ), E=th; 170mTm measured T1/2, σ act, Eγ, Iγ, γγ-coin, γ-delay. 170Tm deduced levels. Natural target. 169Tm(d, p), E=9 MeV; 170mTm measured T1/2, Eγ, Iγ, E(ce), I(ce), γ-delay, ce-delay. Natural target.

doi: 10.1016/0375-9474(67)90019-X
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset23494.


1967BJ03      Nucl.Phys. A95, 513 (1967)

S.Bjornholm, J.Borggreen, L.Westgaard, V.A.Karnaukhov

Excitation Energy of the Spontaneously Fissioning Isomeric State in 240Am

NUCLEAR REACTIONS 240Pu(d, 2n), E = 12.1 MeV; 240Pu(p, n), E = 10.3-11.3 MeV; measured σ (delayed fission). 241Pu(p, 2n), E = 9.6-13.6 MeV; measured σ (delayed fission); deduced threshold. Enriched target. 240mAm measured T1/2 for spontaneous fission.

doi: 10.1016/0375-9474(67)90846-9
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetO2042.


1967BO05      Nucl.Phys. A95, 202 (1967)

J.Borggreen, L.Westgaard, N.J.S.Hansen

A Spin 11/2 Isomer in 157Gd

RADIOACTIVITY 157mGd measured Eγ, Iγ, γγ-coin, γγ-delay, T1/2. 157Gd deduced levels, J, π. Ge(Li) detector. 150,152,154Sm(α, n), Eα = 18 MeV; measured σ, Eγ, αγ-delay. Enriched targets, Ge(Li) detector.

doi: 10.1016/0375-9474(67)90161-3
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1967BO08      Nucl.Phys. A96, 561 (1967)

J.Borggreen, N.J.S.Hansen, J.Pedersen, L.Westgaard, J.Zylicz, S.Bjornholm

Isomerism in 176Hf and Some Neighbouring Even Nuclei

NUCLEAR REACTIONS 176Lu(p, nγ), 181Ta(p, 2nγ), E = 10, 12 MeV; measured pγ-delay. 173Yb(d, pγ), 176Yb(d, d'γ), E = 12 MeV; measured dγ-delay. 176Hf, 174,176Yb, 180W levels deduced T1/2. Enriched 176Lu, 173,176Yb targets, Ge(Li) detector. 176mHf, 174m,176mYb, 180mW; measured Eγ, Iγ, I(ce), γγ-, γce-coin, γce-delay. 176Hf, 174,176Yb, 180W deduced levels, T1/2, J, π.

doi: 10.1016/0375-9474(67)90605-7
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1967BO23      Phys.Letters 25B, 402 (1967)

J.Borggreen, Y.P.Gangrsky, G.Sletten, S.Bjornholm

A New Spontaneously Fissioning Isomer: 238Am

NUCLEAR STRUCTURE 238Am; measured not abstracted; deduced nuclear properties.

doi: 10.1016/0370-2693(67)90158-X
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1966BO02      Nucl.Phys. 77, 619 (1966)

J.Borggreen, H.J.Frahm, N.J.S.Hansen, S.Bjornholm

Lifetimes of E3 Transitions in the Odd-Mass Ho Isotopes

RADIOACTIVITY 159Ho, 161Ho, 163Ho isomers [from 160Dy, 161Dy, 162Dy, 163Dy(p, n)(p, 2n)], measured Eγ, Iγ, ce, ICC, T1/2. 159Ho, 161Ho, 163Ho deduced level , J, π. Enriched targets. 160Dy, 161Dy, 162Dy, 163Dy (p, n)(p, 2n), E=9-13 MeV; measured σ, p, isomer. Enriched targets.

doi: 10.1016/0029-5582(66)90787-5
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1965BJ01      Nucl.Phys. 73, 593 (1965)

S.Bjornholm, J.Borggreen, H.J.Frahm, N.J.S.Hansen

Isomers in Odd-Mass Lu Isotopes, Ascribed to the (541)1/2- Nilsson Configuration

RADIOACTIVITY 169,171,173,175Lu [from 170,171,173,176Yb (p, xn)]; measured T1/2, Eγ, ICC. 169,171,173,175Lu deduced levels, J, π. Enriched targets.

doi: 10.1016/0029-5582(65)90704-2
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1965BJ03      Phys.Rev. 140, B816 (1965)

S.Bjornholm, J.Borggreen, H.J.Frahm, N.J.S.Hansen, O.Schult

Decay of the 185-μsec Isomer in Ho166

NUCLEAR STRUCTURE 166Ho; measured not abstracted; deduced nuclear properties.

doi: 10.1103/PhysRev.140.B816
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1965BO22      Nucl.Phys. 72, 509 (1965)

J.Borggreen, H.J.Frahm, N.J.S.Hansen, S.Bjornholm

Observation of the (505)11/2- Nilsson State as an Isomer in 159Dy

NUCLEAR REACTIONS 159Tb(p, n), E = 8-12 MeV; 159Tb(d, 2n) E = 12 MeV; Gd(α, xn), E = 18 MeV; measured σ(Ep), pγ-delay. 159Dy deduced T1/2. 159Dy; measured Eγ, Iγ, ICC. 159Dy deduced levels, J, π.

doi: 10.1016/0029-5582(65)90407-4
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1964BO35      Kgl. Danske Videnskab. Selskab., Mat.-Fys. Medd. 34, No. 9 (1964)

J.Borggreen, B.Elbek, R.B.Leachman

C12(C12, α)Ne20 Cross Section Measurements

NUCLEAR STRUCTURE 12C; measured not abstracted; deduced nuclear properties.


1962BO03      Nuclear Phys. 29, 515 (1962)

J.Borggreen, O.B.Nielsen, H.Nordby

Mixing of the γ-Vibrational Band and the Ground-State Rotational Band of Pu238

NUCLEAR STRUCTURE 238Np; measured not abstracted; deduced nuclear properties.

doi: 10.1016/0029-5582(62)90201-8
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1961BE21      Phys.Rev. 123, 564 (1961)

U.Bertelsen, I.Borggreen, O.Nathan

Directional Correlation Measurements in Hf178

NUCLEAR STRUCTURE 178Ta, 178Hf; measured not abstracted; deduced nuclear properties.

doi: 10.1103/PhysRev.123.564
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