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NSR database version of April 25, 2024.

Search: Author = B.Crowell

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2001WI11      Phys.Lett. 505B, 6 (2001)

A.N.Wilson, J.Timar, I.Ahmad, A.Astier, F.Azaiez, M.H.Bergstrom, D.J.Blumenthal, B.Crowell, M.P.Carpenter, L.Ducroux, B.J.P.Gall, F.Hannachi, H.Hubel, T.L.Khoo, R.V.F.Janssens, A.Korichi, T.Lauritsen, A.Lopez-Martens, M.Meyer, D.Nisius, E.S.Paul, M.G.Porquet, N.Redon, J.F.Sharpey-Schafer, R.Wadsworth, J.N.Wilson, I.Ragnarsson

Magnetic Dipole Bands in ¹⁹⁰Hg: First evidence of excitations across the Z=82 sub-shell in Hg nuclei

NUCLEAR REACTIONS ¹⁶⁰Gd(³⁴S, 4n), E=153 MeV; measured Eγ, Iγ, γγ-coin, γ-ray polarization. ¹⁹⁰Hg deduced high-spin levels, J, π, B(M1)/B(E2), magnetic dipole bands. Eurogam II array, cranked mean-field calculations.

doi: 10.1016/S0370-2693(01)00332-X
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2000CO06      J.Phys.(London) G26, 23 (2000)

J.F.C.Cocks, P.A.Butler, K.J.Cann, P.T.Greenlees, G.D.Jones, J.F.Smith, P.M.Jones, R.Julin, S.Juutinen, D.Muller, M.Piiparinen, A.Savelius, R.Broda, B.Fornal, I.Ahmad, D.J.Blumenthal, M.P.Carpenter, B.Crowell, R.V.F.Janssens, T.L.Khoo, T.Lauritsen, D.Nisius, S.Asztalos, R.M.Clark, M.A.Deleplanque, R.M.Diamond, P.Fallon, I.Y.Lee, A.O.Macchiavelli, R.W.MacLeod, F.S.Stephens, P.Bhattacharyya, C.T.Zhang

Multi-Nucleon Transfer Reactions as a Tool for Spectroscopy of Heavy Nuclei

NUCLEAR REACTIONS ²³²Th(⁵⁶Fe, X), E=362 MeV; ²³²Th(⁸⁶Kr, X), E=511 MeV; ²³²Th(¹³⁶Xe, X), E=830, 833 MeV; measured Eγ, Iγ(θ), γγ-coin; deduced transfer products yields and highest angular momentum value. GAMMASPHERE and other Ge detector arrays.

doi: 10.1088/0954-3899/26/2/102
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2000GH01      Phys.Rev. C61, 024302 (2000); Erratum Phys.Rev. C62, 029902 (2000)

S.S.Ghugre, B.Kharraja, U.Garg, R.V.F.Janssens, M.P.Carpenter, B.Crowell, T.L.Khoo, T.Lauritsen, D.Nisius, W.Reviol, W.F.Mueller, L.L.Riedinger, R.Kaczarowski

Level Structure of ^{94, 95, 96}Tc at High Spins and Shell-Model Calculations

NUCLEAR REACTIONS ⁶⁵Cu(³⁶S, nα), (³⁶S, 2nα), (³⁶S, 3nα), E=142 MeV; measured Eγ, Iγ, γγ-coin; deduced relative yields. ^94,95,96Tc deduced high-spin levels, J, π. Gammasphere array. Comparison with shell model.

doi: 10.1103/PhysRevC.61.024302
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1998GH07      Phys.Rev. C58, 3243 (1998)

S.S.Ghugre, B.Kharraja, U.Garg, R.V.F.Janssens, M.P.Carpenter, B.Crowell, T.L.Khoo, T.Lauritsen, D.Nisius, W.Mueller, W.Reviol, L.L.Riedinger, R.Kaczarowski

High-Spin States in ^{97, 98}Rh

NUCLEAR REACTIONS ⁶⁵Cu(³⁶S, 3n), (³⁶S, 4n), E=142 MeV; measured Eγ, Iγ, γγ-coin. ^97,98Rh deduced high-spin levels, J, π, configurations. Gammasphere. Comparison with shell model calculations.

doi: 10.1103/PhysRevC.58.3243
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1998JI04      Phys.Rev. C57, 2393 (1998)

C.L.Jiang, K.E.Rehm, H.Esbensen, D.J.Blumenthal, B.Crowell, J.Gehring, B.Glagola, J.P.Schiffer, A.H.Wuosmaa

Multineutron Transfer in ⁵⁸Ni + ¹²⁴Sn Collisions at Sub-Barrier Energies

NUCLEAR REACTIONS, ICPND ⁵⁸Ni(¹²⁴Sn, X)⁵⁸Ni/⁵⁹Ni/⁶⁰Ni/⁶¹Ni/⁶²Ni/⁶³Ni/⁶⁴Ni/⁶⁵Ni/⁵⁷Co/⁵⁶Fe, E=480-512 MeV; measured σ(θ), σ; deduced neutron transfer probabilities, Q-values.

doi: 10.1103/PhysRevC.57.2393
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1998KH01      Phys.Rev. C57, 83 (1998)

B.Kharraja, S.S.Ghugre, U.Garg, R.V.F.Janssens, M.P.Carpenter, B.Crowell, T.L.Khoo, T.Lauritsen, D.Nisius, W.Reviol, W.F.Mueller, L.L.Riedinger, R.Kaczarowski

Level Structures of ^96,97,98Ru at High Angular Momentum

NUCLEAR REACTIONS ⁶⁵Cu(³⁶S, 2np), (³⁶S, 3np), (³⁶S, 4np), E=142 MeV; measured Eγ, Iγ, γγ-coin. ^96,97,98Ru deduced high-spin levels, J, π, configurations. Spherical shell model, weak-coupling model calculations.

doi: 10.1103/PhysRevC.57.83
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1998KH04      Phys.Rev. C57, 2903 (1998)

B.Kharraja, S.S.Ghugre, U.Garg, R.V.F.Janssens, M.P.Carpenter, B.Crowell, T.L.Khoo, T.Lauritsen, D.Nisius, W.Reviol, W.F.Mueller, L.L.Riedinger, R.Kaczarowski

Nuclear Structure of ^94,95Mo at High Spins

NUCLEAR REACTIONS ⁶⁵Cu(³⁶S, 2npα), (³⁶S, npα), E=142 MeV; measured Eγ, Iγ, γγ-coin, DCO. ^94,95Mo deduced high-spin levels, J, π, configurations. Comparison with shell-model calculations.

doi: 10.1103/PhysRevC.57.2903
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1997AM06      Phys.Lett. 413B, 15 (1997)

H.Amro, E.F.Moore, R.V.F.Janssens, G.Hackman, S.M.Fischer, M.P.Carpenter, I.Ahmad, B.Crowell, T.L.Khoo, T.Lauritsen, D.Nisius, J.Timar, A.N.Wilson

Lifetime Measurements and Dipole Transition Rates for Superdeformed States in ¹⁹⁰Hg

NUCLEAR REACTIONS ¹⁶⁰Gd(³⁴S, 4n), E=159 MeV; measured Eγ, Iγ, γγ-coin, DSA. ¹⁹⁰Hg deduced superdeformed levels T_1/2, B(λ), quadrupole moment, evidence for octupole vibration.

doi: 10.1016/S0370-2693(97)01113-1
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1997JO03      Phys.Rev. C55, 1108 (1997)

T.D.Johnson, A.Aprahamian, C.J.Lister, D.Blumenthal, B.Crowell, P.Chowdhury, P.Fallon, A.O.Macchiavelli

New High Spin States and Band Termination in ⁸³Y and ⁸⁴Zr

NUCLEAR REACTIONS ⁵⁸Ni(²⁹Si, 3p), E=110 MeV; measured Eγ, Iγ, γγ-coin. ⁸³Y deduced high-spin levels, J, π, T_1/2, B(λ), transition quadrupole moment, branching ratio, band termination characteristics. Analyses of data, other nuclei included.

doi: 10.1103/PhysRevC.55.1108
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1997KH03      Acta Phys.Pol. B28, 177 (1997)

B.Kharraja, U.Garg, S.S.Ghugre, M.Carpenter, B.Crowell, S.Fisher, R.V.F.Janssens, T.L.Khoo, T.Lauritsen, D.Nissius, W.Mueller, W.Reviol, L.L.Riedinger, R.Kaczarowski, E.Ruchowska, I.M.Govil

Spectroscopy of ^96-98Ru and Neighboring Nuclei: Shell model calculations and lifetime measurements

NUCLEAR REACTIONS ⁶⁵Cu(³⁶S, xnyp), E=142 MeV; measured Eγ, Iγ, Doppler-shifted spectra. ^96,98Ru deduced high-spin levels, J, π, T_1/2, B(E2), configurations. Recoil-distance technique. Shell model calculations.

1997NI01      Phys.Lett. 392B, 18 (1997)

D.Nisius, R.V.F.Janssens, E.F.Moore, P.Fallon, B.Crowell, T.Lauritsen, G.Hackman, I.Ahmad, H.Amro, S.Asztalos, M.P.Carpenter, P.Chowdhury, R.M.Clark, P.J.Daly, M.A.Deleplanque, R.M.Diamond, S.M.Fischer, Z.W.Grabowski, T.L.Khoo, I.Y.Lee, A.O.Macchiavelli, R.H.Mayer, F.S.Stephens, A.V.Afanasjev, I.Ragnarsson

Differential Lifetime Measurements and Configuration-Dependent Quadrupole Moments for Superdeformed Bands in Nuclei Near ¹⁵²Dy

NUCLEAR REACTIONS ¹²²Sn(³⁴S, 5n), (³⁴S, 4n), (³⁴S, 4np), E=175 MeV; measured γγ-coin, energy correlations, DSAM. ^151,152Dy, ¹⁵¹Tb deduced levels, J, π, superdeformed bands, T_1/2, quadrupole moments, shape polarization related features.

doi: 10.1016/S0370-2693(96)01517-1
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1997VA17      Phys.Lett. 410B, 103 (1997); Erratum Phys.Lett. 421B, 412 (1998)

P.G.Varmette, D.T.Shi, W.C.Ma, A.V.Ramayya, R.V.F.Janssens, C.N.Davids, J.H.Hamilton, I.Ahmad, H.Amro, B.R.S.Babu, B.Back, K.S.Bindra, D.J.Blumenthal, L.T.Brown, M.P.Carpenter, W.L.Croft, B.Crowell, S.M.Fischer, U.Garg, R.G.Henry, T.Ishii, T.L.Khoo, J.Kormicki, T.Lauritsen, C.J.Lister, D.Nisius, H.Penttila, R.B.Piercey, J.A.Winger, S.J.Zhu, P.B.Semmes

Identification of ¹⁸¹Hg and Shape Coexistence in Odd-A Hg Isotopes

NUCLEAR REACTIONS ¹⁴⁴Sm(⁴⁰Ar, 3n), E=175, 180 MeV; measured Eγ, Iγ, γγ-coin, (recoil)γ-coin, DCO ratios. ¹⁸¹Hg deduced levels, J, π, band structure, configurations, possible isomeric state. Comparisons with neighboring nuclei.

doi: 10.1016/S0370-2693(97)01035-6
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1996CO13      Acta Phys.Pol. B27, 213 (1996)

J.F.C.Cocks, D.J.Blumenthal, R.Broda, P.A.Butler, K.J.Cann, B.Crowell, B.Fornal, R.F.Janssens, G.D.Jones, P.M.Jones, R.Julin, S.Juutinen, T.L.Khoo, T.Lauritsen, D.Muller, D.Nisius, M.Piiparinen, A.Savelius, J.F.Smith

Population of Reflection-Asymmetric Nuclei by Multi-Nucleon Transfer Reactions

NUCLEAR REACTIONS ²³²Th(¹³⁶Xe, X), E=830 MeV; ²³²Th(⁵⁶Fe, X), E=362 MeV; measured γγ-coin; deduced fragment production yield vs mass, nucleons transfer mechanism.

1996CR02      Phys.Rev. C53, 1173 (1996)

B.Crowell, P.Chowdhury, D.J.Blumenthal, S.J.Freeman, C.J.Lister, M.P.Carpenter, R.G.Henry, R.V.F.Janssens, T.L.Khoo, T.Lauritsen, Y.Liang, F.Soramel, I.G.Bearden

High-K Isomers in ¹⁷⁶W and Mechanisms of K Violation

NUCLEAR REACTIONS ¹⁵⁰Nd(³⁰Si, 4n), E=133 MeV; measured Eγ, Iγ, γγ-coin-, γγ(θ). ¹⁷⁶W deduced high-spin levels, J, π, K isomer, T_1/2, decay features, band structure, comparison with ¹⁷⁴Hf.

NUCLEAR STRUCTURE ¹⁷⁶W; calculated K-hindrances. Coriolis-mixing model, tunneling through potential barrier.

doi: 10.1103/PhysRevC.53.1173
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1996FA14      Phys.Rev. C54, 1249 (1996)

K.A.Farrar, S.J.Sanders, A.K.Dummer, A.T.Hasan, F.W.Prosser, B.B.Back, I.G.Bearden, R.R.Betts, M.P.Carpenter, B.Crowell, M.Freer, D.J.Henderson, R.V.F.Janssens, T.L.Khoo, T.Lauritsen, Y.Liang, D.Nisius, A.H.Wuosmaa, C.Beck, R.M.Freeman, Sl.Cavallaro, A.Szanto de Toledo

Fission Decay of ⁴⁸Cr at E(*)(CN) ≈ 60 MeV

NUCLEAR REACTIONS ¹²C(³⁶Ar, X), ²⁸Si(²⁰Ne, X), ²⁴Mg(²⁴Mg, X), E(cm)=47, 45.5, 44.4 MeV; measured Eγ, Iγ, (particle)(particle)γ-coin; deduced σ(A) for fission, evaporation residues. ⁴⁸Ca deduced spin distribution, fission decay features.

doi: 10.1103/PhysRevC.54.1249
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1996FI02      Phys.Rev. C53, 2126 (1996)

S.M.Fischer, M.P.Carpenter, R.V.F.Janssens, B.Crowell, I.Ahmad, D.J.Blumenthal, T.L.Khoo, T.Lauritsen, D.Nisius, W.Reviol, W.F.Mueller, L.L.Riedinger, B.H.Smith, B.Cederwall

Alignment Additivity in the Two-Quasiparticle Superdeformed Bands of ¹⁹²Tl

NUCLEAR REACTIONS ¹⁶⁰Gd(³⁷Cl, 5n), E=178 MeV; measured Eγ, γγγ-coin, Iγ. ¹⁹²Tl deduced levels, J, π, superdeformed bands, configurations, quasiparticle alignments.

doi: 10.1103/PhysRevC.53.2126
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1996WI08      Phys.Rev. C54, 559 (1996)

A.N.Wilson, J.Timar, J.F.Sharpey-Schafer, B.Crowell, M.P.Carpenter, R.V.F.Janssens, D.J.Blumenthal, I.Ahmad, A.Astier, F.Azaiez, M.Bergstrom, L.Ducroux, B.J.P.Gall, F.Hannachi, T.L.Khoo, A.Korichi, T.Lauritsen, A.Lopez-Martens, M.Meyer, D.Nisius, E.S.Paul, M.G.Porquet, N.Redon, J.N.Wilson, T.Nakatsukasa

Collective and Quasiparticle Excitations in Superdeformed ¹⁹⁰Hg

NUCLEAR REACTIONS ¹⁶⁰Gd(³⁴S, 4n), E ≈ 155 MeV; measured γγ-coin, Eγ, Iγ. ¹⁹⁰Hg deduced high-spin levels, J, π, B(λ), superdeformed bands.

doi: 10.1103/PhysRevC.54.559
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1995CA15      Phys.Rev. C51, 2400 (1995)

M.P.Carpenter, R.V.F.Janssens, B.Cederwall, B.Crowell, I.Ahmad, J.A.Becker, M.J.Brinkman, M.A.Deleplanque, R.M.Diamond, P.Fallon, L.P.Farris, U.Garg, D.Gassmann, E.A.Henry, R.G.Henry, J.R.Hughes, T.L.Khoo, T.Lauritsen, I.Y.Lee, A.O.Macchiavelli, E.F.Moore, D.Nisius, F.S.Stephens

Identification of the Unfavored N = 7 Superdeformed Band in ¹⁹¹Hg

NUCLEAR REACTIONS ¹⁶⁰Gd(³⁶S, 5n), E=172 MeV; ¹⁷⁴Yb(²²Ne, 5n), E=120 MeV; measured γγ-coin, Eγ, Iγ. ¹⁹¹Hg deduced high-spin levels, J, π, superdeformed bands dynamical moment of inertia. Cranked Woods-Saxon calculations.

doi: 10.1103/PhysRevC.51.2400
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1995CR02      Phys.Rev. C51, R1599 (1995)

B.Crowell, M.P.Carpenter, R.V.F.Janssens, D.J.Blumenthal, J.Timar, A.N.Wilson, J.F.Sharpey-Schafer, T.Nakatsukasa, I.Ahmad, A.Astier, F.Azaiez, L.du Croux, B.J.P.Gall, F.Hannachi, T.L.Khoo, A.Korichi, T.Lauritsen, A.Lopez-Martens, M.Meyer, D.Nisius, E.S.Paul, M.G.Porquet, N.Redon

Relative Spins and Excitation Energies of Superdeformed Bands in ¹⁹⁰Hg: Further evide4nce for octupole vibration

NUCLEAR REACTIONS ¹⁶⁰Gd(³⁴S, 4n), E ≈ 158 MeV; measured Eγ, relative Eγ, relative Iγ, γγγ-coin, DCO ratios. ¹⁹⁰Hg deduced high-spin levels, J, π, J² moments of inertia, B(λ), relative excitation energy between two superdeformed bands. Comparison with RPA calculations.

doi: 10.1103/PhysRevC.51.R1599
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1995CR07      Nucl.Instrum.Methods Phys.Res. A355, 575 (1995)

B.Crowell, M.P.Carpenter, R.G.Henry, R.V.F.Janssens, T.L.Khoo, T.Lauritsen, D.Nisius

Background Subtraction for High-Fold Gamma-Ray Coincidence Data

NUCLEAR REACTIONS ¹⁶⁰Gd(³⁴S, 4n), E=159 MeV; analyzed γγ-coin data; deduced automatic background subtraction method features, possible difficulties. High-fold γ-ray coincidence.

NUCLEAR STRUCTURE ¹⁵⁰Tb; analyzed γγ-coin data; deduced automatic background subtraction method features, possible difficulties. High-fold γ-ray coincidence.

doi: 10.1016/0168-9002(94)01118-4
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1995DO26      Phys.Rev.Lett. 75, 1276 (1995)

T.Dossing, T.L.Khoo, T.Lauritsen, I.Ahmad, D.Blumenthal, M.P.Carpenter, B.Crowell, D.Gassmann, R.G.Henry, R.V.F.Janssens, D.Nisius

Effects of Pair Correlations in Statistical γ-Decay Spectra

NUCLEAR STRUCTURE ^192,194,191Hg; analyzed superdeformed band statistical γ-decay data features; deduced pairing correlation energy related features. Other nuclei included.

doi: 10.1103/PhysRevLett.75.1276
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1995FA03      Phys.Rev. C51, R1609 (1995)

P.Fallon, T.Lauritsen, I.Ahmad, M.P.Carpenter, B.Cederwall, R.M.Clark, B.Crowell, M.A.Deleplanque, R.M.Diamond, B.Gall, F.Hannachi, R.G.Henry, R.V.F.Janssens, T.L.Khoo, A.Korichi, I.Y.Lee, A.O.Macchiavelli, C.Schuck, F.S.Stephens

Quasiparticle Excitations in Superdeformed ¹⁹²Hg

NUCLEAR REACTIONS ¹⁶⁰Gd(³⁶S, 4n), E=159 MeV; measured γγ-, γγγ-coin. ¹⁹²Hg deduced high-spin levels, J, π, superdeformed bands, dynamic moment of inertia.

doi: 10.1103/PhysRevC.51.R1609
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1995FA09      Phys.Rev. C52, 93 (1995)

P.Fallon, C.W.Beausang, S.Asztalos, D.Nisius, R.V.F.Janssens, M.Bergstrom, M.Carpenter, B.Cederwall, S.Clarke, B.Crowell, M.A.Deleplanque, R.M.Diamond, R.G.Henry, T.L.Khoo, T.Lauritsen, I.Y.Lee, A.O.Macchiavelli, F.S.Stephens, P.J.Twin

Proton and Neutron Excitations in Superdeformed ¹⁵⁰Tb

NUCLEAR REACTIONS ¹²⁴Sn(³¹P, 5n), E=167 MeV; measured Eγ-Eγ-coin. ¹⁵⁰Tb deduced levels, J, π, superdeformed bands.

doi: 10.1103/PhysRevC.52.93
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1995MO39      Nucl.Instrum.Methods Phys.Res. B99, 308 (1995)

E.F.Moore, W.Henning, R.V.F.Janssens, T.L.Khoo, S.J.Sanders, I.Ahmad, H.Amro, D.Blumenthal, M.P.Carpenter, B.Crowell, M.W.Drigert, D.Gassmann, R.G.Henry, T.Lauritsen, C.J.Lister, D.Nisius

Search for the Two-Phonon Octupole Vibrational State in ²⁰⁸Pb

NUCLEAR REACTIONS ²⁰⁸Pb, ²⁰⁹Bi, ^58,64Ni, ¹⁶⁰Gd(²⁰⁸Pb, ²⁰⁸Pb'), E=1305 MeV; measured γγ-coin, Eγ, Iγ following projectile excitation. ²⁰⁸Pb deduced no evidence for two-phonon octupole vibrational state.

doi: 10.1016/0168-583X(94)00687-3
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1995NI03      Phys.Rev. C51, R1061 (1995)

D.Nisius, R.V.F.Janssens, T.L.Khoo, I.Ahmad, D.Blumenthal, M.P.Carpenter, B.Crowell, D.Gassmann, T.Lauritsen, W.C.Ma, J.H.Hamilton, A.V.Ramayya, P.Bhattacharyya, C.T.Zhang, P.J.Daly, Z.W.Grabowski, R.H.Mayer

Superdeformed Band in ¹⁵⁴Dy

NUCLEAR REACTIONS ¹²²Sn(³⁶S, 4n), E=165 MeV; measured Eγ, relative Iγ, γγγ-coin. ¹⁵⁴Dy deduced high-spin levels, J, π, superdeformation band transitions.

doi: 10.1103/PhysRevC.51.R1061
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1995NI06      Phys.Lett. 346B, 15 (1995)

D.Nisius, R.V.F.Janssens, P.Fallon, B.Crowell, I.Ahmad, C.W.Beausang, M.P.Carpenter, B.Cederwall, P.J.Daly, M.A.Deleplanque, R.M.Diamond, D.Gassmann, Z.W.Grabowski, R.G.Henry, T.L.Khoo, T.Lauritsen, I.Y.Lee, A.O.Macchiavelli, R.H.Mayer, F.S.Stephens, P.J.Twin

' Identical ' Superdeformed Band in ¹⁵¹Dy: Further evidence for the pseudospin coupling scheme

NUCLEAR REACTIONS ¹²²Sn(³⁴S, 5n), E=175 MeV; measured Eγ, Iγ, γγγ-coin. ¹⁵¹Dy deduced high-spin levels, J, π, superdeformed band.

doi: 10.1016/0370-2693(95)00013-B
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1995NI10      Phys.Rev. C52, 1355 (1995)

D.Nisius, R.V.F.Janssens, I.G.Bearden, R.H.Mayer, I.Ahmad, P.Bhattacharyya, B.Crowell, M.P.Carpenter, P.J.Daly, C.N.Davids, Z.W.Grabowski, D.J.Henderson, R.G.Henry, R.Hermann, T.L.Khoo, T.Lauritsen, H.T.Penttila, L.Ciszewski, C.T.Zhang

Conversion Electron Spectroscopy at the Fragment Mass Analyzer Focal Plane: Studies of isomeric decays near the proton drip line

RADIOACTIVITY ^149,150Er(EC) [from ⁹⁴Mo(⁵⁸Ni, X), E=250 MeV]; ^151,152Yb(EC) [from ⁹⁶Ru(⁵⁸Ni, X), E=250 MeV]; measured Eγ, Iγ, I(ce)-, γ(ce)-coin, T_1/2; deduced isomer decay transitions γ-multipolarity, levels, J, π.

doi: 10.1103/PhysRevC.52.1355
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1994CE04      Phys.Rev.Lett. 72, 3150 (1994)

B.Cederwall, R.V.F.Janssens, M.J.Brinkman, I.Y.Lee, I.Ahmad, J.A.Becker, M.P.Carpenter, B.Crowell, M.A.Deleplanque, R.M.Diamond, J.E.Draper, C.Duyar, P.Fallon, L.P.Farris, E.A.Henry, R.G.Henry, J.R.Hughes, T.L.Khoo, T.Lauritsen, A.O.Macchiavelli, E.Rubel, F.S.Stephens, M.A.Stoyer, W.Satula, I.Wiedenhoever, R.Wyss

New Features of Superdeformed Bands in ¹⁹⁴Hg

NUCLEAR REACTIONS ¹⁵⁰Nd(⁴⁸Ca, 4n), E=206 MeV; measured γγ-coin. ¹⁹⁴Hg deduced levels, J, π, superdeformed band properties.

doi: 10.1103/PhysRevLett.72.3150
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1994CR03      Phys.Rev.Lett. 72, 1164 (1994)

B.Crowell, P.Chowdhury, S.J.Freeman, C.J.Lister, M.P.Carpenter, R.G.Henry, R.V.F.Janssens, T.L.Khoo, T.Lauritsen, Y.Liang, F.Soramel, I.G.Bearden

Novel Decay Modes of High-K Isomers: Tunneling in a triaxial landscape

NUCLEAR REACTIONS ¹⁵⁰Nd(³⁰Si, 4n), E=133 MeV; measured Eγ, Iγ, γγ-coin, γγ(t). ¹⁷⁶W deduced isomer, T_1/2, J, π, K, decay features, band structure. Coriolis mixing model, tunneling through potential barrier.

doi: 10.1103/PhysRevLett.72.1164
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1994CR04      Phys.Rev.Lett. 72, 3737 (1994)

B.Crowell, P.Chowdhury, S.J.Freeman, C.J.Lister, M.P.Carpenter, R.G.Henry, R.V.F.Janssens, T.L.Khoo, T.Lauritsen, Y.Liang, F.Soramel

Crowell et al. Reply:

NUCLEAR STRUCTURE ¹⁷⁶W; analyzed high-spin isomer decay features; deduced accidental degeneracies role.

doi: 10.1103/PhysRevLett.72.3737
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1994CR05      Phys.Rev. C50, 1321 (1994)

B.Crowell, P.J.Ennis, C.J.Lister, W.R.Schief, Jr.

Test of Predicted Gamma Stability at Spins above 8(h-bar) in ⁶⁴Zn

NUCLEAR REACTIONS ¹²C(⁵⁴Fe, 2p), E=155 MeV; measured Eγ, Iγ, (recoil)γ-, (recoil)γγ-coin, γ(θ), γγ(θ), DCO. ⁶⁴Zn deduced high-spin levels J, π, γ-multipolarity, B(λ), quadrupole moments. Cranked Nilsson-Strutinsky, Woods-Saxon, Hartree-Fock models, Bohr Hamiltonian.

doi: 10.1103/PhysRevC.50.1321
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1994CR08      Phys.Lett. 333B, 320 (1994)

B.Crowell, R.V.F.Janssens, M.P.Carpenter, I.Ahmad, S.Harfenist, R.G.Henry, T.L.Khoo, T.Lauritsen, D.Nisius, A.N.Wilson, J.F.Sharpey-Schafer, J.Skalski

Superdeformed Band with a Unique Decay Pattern: Possible evidence for octupole vibration in ¹⁹⁰Hg

NUCLEAR REACTIONS ¹⁶⁰Gd(³⁴S, 4n), E=163 MeV; measured γγ-coin. ¹⁹⁰Hg deduced high-spin levels, J, π, superdeformed band transitions, dynamic moment of inertia, shape features.

doi: 10.1016/0370-2693(94)90149-X
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1994FR11      Phys.Rev. C50, R1754 (1994)

S.J.Freeman, A.G.Smith, S.J.Warburton, B.B.Back, I.G.Bearden, D.J.Blumenthal, M.P.Carpenter, B.Crowell, C.N.Davids, D.Henderson, R.V.F.Janssens, T.L.Khoo, T.Lauritsen, C.J.Lister, D.Nisius, H.T.Penttila, J.A.Becker, P.Chowdhury, E.F.Moore

Low-Lying Structure of the Neutron-Deficient Isotope ²⁰²Rn

NUCLEAR REACTIONS ¹⁸¹Ta(²⁷Al, xn), E=132, 150 MeV; ¹⁹²Pt(¹⁶O, xn), E=110 MeV; measured Eγ, γ(recoil)-, γγ-coin. ^202,203,204Rn deduced high-spin levels, Iγ. Ge detector array, recoil separator, enriched target.

doi: 10.1103/PhysRevC.50.R1754
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1994HE30      Phys.Rev.Lett. 73, 777 (1994)

R.G.Henry, T.Lauritsen, T.L.Khoo, I.Ahmad, M.P.Carpenter, B.Crowell, T.Dossing, R.V.F.Janssens, F.Hannachi, A.Korichi, C.Schuck, F.Azaiez, C.W.Beausang, R.Beraud, C.Bourgeois, R.M.Clark, I.Deloncle, J.Duprat, B.Gall, H.Hubel, M.J.Joyce, M.Kaci, Y.Lecoz, M.Meyer, E.S.Paul, N.Perrin, N.Poffe, M.G.Porquet, N.Redon, H.Sergolle, J.F.Sharpey-Schafer, J.Simpson, A.G.Smith, R.Wadsworth, P.Willsau

Spectrum of γ Rays Connecting Superdeformed and Normal States in ¹⁹²Hg

NUCLEAR REACTIONS ¹⁶⁰Gd(³⁶S, 4n), E=159 MeV; measured γγ-coin. ¹⁹²Hg deduced superdeformed to normal high-spin states transition, band coupling features.

doi: 10.1103/PhysRevLett.73.777
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1992CR02      Phys.Rev. C45, 1564 (1992)

B.Crowell, P.Chowdhury, D.J.Blumenthal, P.J.Ennis, S.J.Freeman, C.J.Lister, S.Smolen, Ch.Winter

Transitional Nucleus ¹⁰¹Ag: Spin-stabilized deformation in odd Ag isotopes

NUCLEAR REACTIONS ⁷⁰Ge(³⁵Cl, 2n2p), E=130 MeV; measured Eγ, Iγ, γγ-coin, γ(θ), γγ(θ), γ multiplicity. ¹⁰¹Ag deduced levels, J, δ. Compton-suppressed Ge detectors, BGO detectors. Cranked Nilsson model, Strutinsky renormalization, particle-number projection.

doi: 10.1103/PhysRevC.45.1564
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1991BL15      Phys.Rev.Lett. 66, 3121 (1991)

D.J.Blumenthal, C.J.Lister, P.Chowdhury, B.Crowell, P.J.Ennis, Ch.Winter, T.Drake, A.Galindo-Uribarri, G.Zwartz, H.R.Andrews, G.C.Ball, D.Radford, D.Ward, V.P.Janzen

Search for Nuclear-Structure Effects in Proton Evaporation Spectra

NUCLEAR REACTIONS ⁵⁸Ni(²⁹Si, n2p), (²⁹Si, 2pα), (²⁸Si, xnypzα), E=110 MeV; measured proton spectra, Doppler shifts, pp-, γγ-, pγ-, αp-coin; deduced channel, angular momentum dependences.

doi: 10.1103/PhysRevLett.66.3121
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1991CH40      Phys.Rev.Lett. 67, 2950 (1991)

P.Chowdhury, C.J.Lister, D.Vretenar, Ch.Winter, V.P.Janzen, H.R.Andrews, D.J.Blumenthal, B.Crowell, T.Drake, P.J.Ennis, A.Galindo-Uribarri, D.Horn, J.K.Johansson, A.Omar, S.Pilotte, D.Prevost, D.Radford, J.C.Waddington, D.Ward

Large B(M1) Staggering at High Spins in ⁸⁶Zr: Broken boson pairs in the four-quasiparticle regime

NUCLEAR REACTIONS ⁶⁰Ni(³⁰Si, 2n2p), E=135 MeV; measured DSA, γγ energy correlations, γγ-coin, γγ(θ). ⁸⁶Zr deduced levels, J, π, B(λ), T_1/2, band structure. Interacting boson model, broken pair approximation.

doi: 10.1103/PhysRevLett.67.2950
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1991HE02      Phys.Rev. C43, R921 (1991)

J.Heese, D.J.Blumenthal, A.A.Chishti, P.Chowdhury, B.Crowell, P.J.Ennis, C.J.Lister, Ch.Winter

Observation of Simultaneous g_9/2 Proton and Neutron Alignment in ⁷⁴Kr

NUCLEAR REACTIONS ⁴⁰Ca(⁴⁰Ca, 2pα), E=125, 140 MeV; measured Iγ, Eγ, γγ-coin, αγγ-coin, DSA. ⁷⁴Kr deduced levels, J, π, T_1/2, rotational bands, B(E2), transitional quadrupole moments, deformation parameters.

doi: 10.1103/PhysRevC.43.R921
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1991WI15      Nucl.Phys. A535, 137 (1991)

Ch.Winter, D.J.Blumenthal, P.Chowdhury, B.Crowell, P.J.Ennis, S.J.Freeman, C.J.Lister, C.J.Gross, J.Heese, A.Jungclaus, K.P.Lieb, D.Rudolph, M.A.Bentley, W.Gelletly, J.Simpson, J.L.Durell, B.J.Varley

Investigation of Shape Changes in ⁸⁷Mo

NUCLEAR REACTIONS ⁵⁸Ni(³²S, n2p), E=110, 120, 130 MeV; ⁴⁰Ca(⁵⁰Cr, n2p), E=170 MeV; measured Eγ, Iγ(E, θ), DSA, recoil distance. ⁸⁷Mo deduced levels, branching ratios, J, π, B(E2), T_1/2. Recoil separator, neutron detectors, germanium detector array. Enriched targets.

doi: 10.1016/0375-9474(91)90520-G
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