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Search: Author = C.W.Beausang

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2018CO12      Phys.Rev. C 98, 044618 (2018)

N.Cooper, C.W.Beausang, P.Humby, A.Simon, J.T.Burke, R.O.Hughes, S.Ota, C.Reingold, A.Saastamoinen, E.Wilson

Entry-level spin distributions and relative γ-neutron branching ratios of samarium isotopes populated by the (p, t) reaction

NUCLEAR REACTIONS 150,152,154Sm(p, t), E=25 MeV; measured Eγ, Iγ, γ(θ), E(t), I(t), angular distribution of tritons, and tγ-coin using the Hyperion detector array consisting of STARS array of Si detectors for triton detection and 13 HPGe clovers for γ detection using enriched targets at the K150 cyclotron facility of Texas A and M university. 148,150,152Sm; deduced relative intensities of γ rays from low-lying levels, entry-level spin distributions, and relative average branching ratios for γ-rays above S(n). Comparison with calculated simulated γ spectra from natural-parity levels using DICEBOX and MCγ codes, and probability densities of entry level spins by modeling (p, t) reaction using PTCRUISER code.

doi: 10.1103/PhysRevC.98.044618
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2017AL11      Eur.Phys.J. A 53, 62 (2017)

J.M.Allmond, C.W.Beausang, T.J.Ross, P.Humby, M.S.Basunia, L.A.Bernstein, D.L.Bleuel, W.Brooks, N.Brown, J.T.Burke, B.K.Darakchieva, K.R.Dudziak, K.E.Evans, P.Fallon, H.B.Jeppesen, J.D.LeBlanc, S.R.Lesher, M.A.McMahan, D.A.Meyer, L.Phair, J.O.Rasmussen, N.D.Scielzo, S.R.Stroberg, M.Wiedeking

Particle-γ coincidence spectroscopy of the N = 90 nucleus 154Gd by (p, tγ)

NUCLEAR REACTIONS 156Gd(p, tγ)154Gd, E=25 MeV; measured Eγ, Iγ(θ), γ∓coin, E(t), I(t), tγ-coin using segmented Si telescope array and HPGe array; deduced triton energy spectra, σ(θ) to discrete states. 154Gd; deduced level scheme, rotational bands. Compared with other (p, t) and (t, p) data.

doi: 10.1140/epja/i2017-12253-2
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2258. Data from this article have been entered in the XUNDL database. For more information, click here.


2017DO01      Phys.Lett. B 766, 334 (2017)

D.T.Doherty, J.M.Allmond, R.V.F.Janssens, W.Korten, S.Zhu, M.Zielinska, D.C.Radford, A.D.Ayangeakaa, B.Bucher, J.C.Batchelder, C.W.Beausang, C.Campbell, M.P.Carpenter, D.Cline, H.L.Crawford, H.M.David, J.P.Delaroche, C.Dickerson, P.Fallon, A.Galindo-Uribarri, F.G.Kondev, J.L.Harker, A.B.Hayes, M.Hendricks, P.Humby, M.Girod, C.J.Gross, M.Klintefjord, K.Kolos, G.J.Lane, T.Lauritsen, J.Libert, A.O.Macchiavelli, P.J.Napiorkowski, E.Padilla-Rodal, R.C.Pardo, W.Reviol, D.G.Sarantites, G.Savard, D.Seweryniak, J.Srebrny, R.Varner, R.Vondrasek, A.Wiens, E.Wilson, J.L.Wood, C.Y.Wu

Triaxiality near the 110Ru ground state from Coulomb excitation

NUCLEAR REACTIONS 208Pb(110Ru, 110Ru'), E=430 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energy spectrum, B(E2) using GOSIA fit of the experimental data, level scheme, J, π, triaxial deformation. Comparison with available data.

doi: 10.1016/j.physletb.2017.01.031
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2017HA03      Phys.Rev. C 95, 014321 (2017)

D.J.Hartley, L.L.Riedinger, R.V.F.Janssens, S.N.T.Majola, M.A.Riley, J.M.Allmond, C.W.Beausang, M.P.Carpenter, C.J.Chiara, N.Cooper, D.Curien, B.J.P.Gall, P.E.Garrett, F.G.Kondev, W.D.Kulp, T.Lauritsen, E.A.McCutchan, D.Miller, S.Miller, J.Piot, N.Redon, J.F.Sharpey-Schafer, J.Simpson, I.Stefanescu, X.Wang, V.Werner, J.L.Wood, C.-H.Yu, S.Zhu, J.Dudek

Investigation of negative-parity states in 156Dy: Search for evidence of tetrahedral symmetry

NUCLEAR REACTIONS 148Nd(12C, 4n), E=65 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO) using GAMMASPHERE array at ATLAS-ANL facility. 156Dy; deduced high-spin levels, J, π, multipolarities, negative-parity bands, alignments, configurations, B(E2)/B(E1) ratios and octupole excitations, no evidence for tetrahedral symmetry. Systematics of Kπ=0-, 3- and Kπ=1-, 4- states in N=90 isotones 152Sm, 154Gd, 156Dy and 160Yb.

doi: 10.1103/PhysRevC.95.014321
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2016HU22      Phys.Rev. C 94, 064314 (2016)

P.Humby, A.Simon, C.W.Beausang, J.M.Allmond, J.T.Burke, R.J.Casperson, R.Chyzh, M.Dag, K.Gell, R.O.Hughes, J.Koglin, E.McCleskey, M.McCleskey, S.Ota, T.J.Ross, A.Saastamoinen, T.Tarlow, G.Vyas

Investigation of discrete states and quasidiscrete structures observed in 150Sm and 152Sm using the (p, tγ) reaction

NUCLEAR REACTIONS 152,154Sm(p, t), E=25 MeV; measured triton spectra, Eγ, Iγ, (triton)γ-, (triton)γγ-coin, σ(θ), angular distribution of peak-like structure (PLS) using the STARLiTeR array at Texas A and M cyclotron facility. Enriched targets. 150,152Sm; deduced levels, J, π, L-transfers. DWBA analysis of σ(θ) data. Comparison with evaluated data taken from the ENSDF database.

doi: 10.1103/PhysRevC.94.064314
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2016SI07      Phys.Rev. C 93, 034303 (2016)

A.Simon, M.Guttormsen, A.C.Larsen, C.W.Beausang, P.Humby, J.T.Burke, R.J.Casperson, R.O.Hughes, T.J.Ross, J.M.Allmond, R.Chyzh, M.Dag, J.Koglin, E.McCleskey, M.McCleskey, S.Ota, A.Saastamoinen

First observation of low-energy γ-ray enhancement in the rare-earth region

NUCLEAR REACTIONS 152,154Sm(p, dγ), E=25 MeV; measured reaction products, Eγ, Iγ, (particle)γ-coin, γ(θ) using STARLiTeR setup for charged-particles, and Ge clover detectors with Compton suppressors for γ rays at K-150 cyclotron at Texas A and M; deduced level density (LD) and γ-ray strength function (γSF) using OSLO method, multipolarity, enhanced low-energy γ-ray strength for rare-earth nuclei, coexistence with the scissors resonance. Comparison with Hauser-Feshbach calculations. Calculated ratios of Maxwellian-averaged (n, γ) reaction rates at T9=0.15 and 1.5 for A=145-202 Sm isotopes.

doi: 10.1103/PhysRevC.93.034303
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2015HE22      Phys.Rev. C 92, 024315 (2015)

T.W.Henry, M.A.Bentley, R.M.Clark, P.J.Davies, V.M.Bader, T.Baugher, D.Bazin, C.W.Beausang, J.S.Berryman, A.M.Bruce, C.M.Campbell, H.L.Crawford, M.Cromaz, P.Fallon, A.Gade, J.Henderson, H.Iwasaki, D.G.Jenkins, I.Y.Lee, A.Lemasson, S.M.Lenzi, A.O.Macchiavelli, D.R.Napoli, A.J.Nichols, S.Paschalis, M.Petri, F.Recchia, J.Rissanen, E.C.Simpson, S.R.Stroberg, R.Wadsworth, D.Weisshaar, A.Wiens, C.Walz

Triplet energy differences and the low lying structure of 62Ga

NUCLEAR REACTIONS 9Be(64Ga, 62Ga), (65Ge, 62Ga), E not given, [secondary 64Ga and 65Ge beams extracted using A1900 separator from 9Be(78Kr, X), E=150 MeV/nucleon primary reaction]; measured Eγ, Iγ, 62Ga particle spectra, (62Ga)γ-, γγ-coin using Gamma-Ray Energy Tracking In-Beam Nuclear Array (GRETINA) for γ rays and S800 spectrograph and cathode readout drift chambers for particles at NSCL-MSU facility. 62Ga; deduced levels populated by 2n and 1p2n knockout reactions, J, π, isospin using triplet energy differences (TED) as guide. Comparison with shell-model predictions of low lying T=0 and T=1 states using ANTOINE and LNPS interactions. Cross section calculations for the knockout process.

COMPILATION A=22, 26, 30, 34, 38, 42, 46, 50, 54, 58, 62, 66, 74; reviewed systematics of triplet energy differences (TED) for the known T=1, 2+ states.

doi: 10.1103/PhysRevC.92.024315
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Data from this article have been entered in the XUNDL database. For more information, click here.


2015HU02      Phys.Rev. C 91, 024322 (2015)

P.Humby, A.Simon, C.W.Beausang, T.J.Ross, R.O.Hughes, J.T.Burke, R.J.Casperson, J.Koglin, S.Ota, J.M.Allmond, M.McCleskey, E.McCleskey, A.Saastamoinen, R.Chyzh, M.Dag, K.Gell, T.Tarlow, G.Vyas

Improved measurement of the half-life of the Jπ = 8- nuclear isomer 152m2Eu

NUCLEAR REACTIONS 154Sm(p, 3n)152mEu, E=25 MeV; measured Eγ, Iγ, delayed γ, half-lives of 0- and 8- isomers in 152Eu by γ(t) using STARS array for particle detection and LiTer array for γ detection at the Texas A and M, K-150 cyclotron facility. Comparison with earlier experimental results.

RADIOACTIVITY 152Eu(β-), (EC)[from 154Sm(p, 3n), E=25 MeV]; measured Eγ, Iγ, half-life of the 0- isomer in 152Eu. Comparison with earlier experimental results.

doi: 10.1103/PhysRevC.91.024322
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Data from this article have been entered in the XUNDL database. For more information, click here.


2014HU12      Phys.Rev. C 90, 014304 (2014)

R.O.Hughes, C.W.Beausang, T.J.Ross, J.T.Burke, R.J.Casperson, N.Cooper, J.E.Escher, K.Gell, E.Good, P.Humby, M.McCleskey, A.Saastimoinen, T.D.Tarlow, I.J.Thompson

236Pu(n, f), 237Pu(n, f), and 238Pu(n, f) cross sections deduced from (p, t), (p, d), and (p, p') surrogate reactions

NUCLEAR REACTIONS 235U, 239Pu(p, t), (p, d), (p, p'), E=28.5 MeV; measured particle and γ spectra, (particle)γ-, (particle)(particle)-, (d)(fission)-coin, cross sections using STARLiTeR array at Texas A-M cyclotron facility. 232,233U, 236,237Pu(n, F), E=0.5-7.5 MeV; deduced σ(E) ratios. 238Pu(n, F), E=0.5-10.5 MeV; deduced σ(E) from (p, p') and σ for 234U(n, F) in ENDF/B-VII evaluation. Surrogate ratio method. Comparison with ENSDF/B-VII evaluations, and some previous experimental results.

doi: 10.1103/PhysRevC.90.014304
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14396.


2014RO25      Phys.Rev. C 90, 044323 (2014)

T.J.Ross, R.O.Hughes, J.M.Allmond, C.W.Beausang, C.T.Angell, M.S.Basunia, D.L.Bleuel, J.T.Burke, R.J.Casperson, J.E.Escher, P.Fallon, R.Hatarik, J.Munson, S.Paschalis, M.Petri, L.W.Phair, J.J.Ressler, N.D.Scielzo

Spectroscopy of 153Gd and 157Gd using the (p, dγ) reaction

NUCLEAR REACTIONS 154,158Gd(p, d), E=25 MeV; measured Eγ, Iγ, E(d), I(d), dγ-, dγγ-coin, d(θ) in coincidence with γ rays using STARS and LIBERACE arrays at LBNL cyclotron facility. 153,157Gd; deduced levels, J, π, L-transfers, Nilsson assignments. DWBA analysis of angular distribution data. Comparison with previous experimental results. Discussed residual effects of a neutron subshell closure at N=64.

doi: 10.1103/PhysRevC.90.044323
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2138. Data from this article have been entered in the XUNDL database. For more information, click here.


2013BU05      Phys.Rev. C 87, 044337 (2013), Pub.Note Phys.Rev. C 88, 019903 (2013)

M.Bunce, P.H.Regan, V.Werner, C.W.Beausang, V.Anagnostatou, M.Bowry, R.J.Casperson, D.Chen, N.Cooper, P.M.Goddard, R.O.Hughes, G.Ilie, P.J.R.Mason, B.Pauerstein, M.W.Reed, T.J.Ross, E.C.Simpson

High-spin study of the shell model nucleus 88Y49

NUCLEAR REACTIONS 74Ge(18O, 3np)60, E=60 MeV; 76Ge(18O, 5np), E=90 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO) using the YRAST ball at WNSL, Yale facility. 88Y; deduced high-spin levels, J, π, bands, configuration. Comparison with truncated valence space shell-model calculations.

NUCLEAR STRUCTURE 88Y; calculated levels, J, π, proton occupancy, configuration. Shell model using computer code NUSHELLX.

doi: 10.1103/PhysRevC.87.044337
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Data from this article have been entered in the XUNDL database. For more information, click here.


2013CR02      Phys.Rev.Lett. 110, 242701 (2013)

H.L.Crawford, R.M.Clark, P.Fallon, A.O.Macchiavelli, T.Baugher, D.Bazin, C.W.Beausang, J.S.Berryman, D.L.Bleuel, C.M.Campbell, M.Cromaz, G.de Angelis, A.Gade, R.O.Hughes, I.Y.Lee, S.M.Lenzi, F.Nowacki, S.Paschalis, M.Petri, A.Poves, A.Ratkiewicz, T.J.Ross, E.Sahin, D.Weisshaar, K.Wimmer, R.Winkler

Quadrupole Collectivity in Neutron-Rich Fe and Cr Isotopes

NUCLEAR REACTIONS Bi(66Fe, 66Fe'), (68Fe, 68Fe'), (64Cr, 64Cr'), E<130 MeV/nucleon; measured reaction products, Eγ, Iγ. 66,68Fe, 64Cr; deduced σ, B(E2). Comparison with state-of-the-art large-scale shell-model calculations within the full fpgd neutron orbital model space using the Lenzi-Nowacki-Poves-Sieja effective interaction.

doi: 10.1103/PhysRevLett.110.242701
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Data from this article have been entered in the XUNDL database. For more information, click here.


2013RO23      Phys.Rev. C 88, 031301 (2013)

T.J.Ross, R.O.Hughes, C.W.Beausang, J.M.Allmond, C.T.Angell, M.S.Basunia, D.L.Bleuel, J.T.Burke, R.J.Casperson, J.E.Escher, P.Fallon, R.Hatarik, J.Munson, S.Paschalis, M.Petri, L.W.Phair, J.J.Ressler, N.D.Scielzo

Remnants of spherical shell structures in deformed nuclei: The impact of an N=64 neutron subshell closure on the structure of N≈90 gadolinium nuclei

NUCLEAR REACTIONS 154,156,158Gd(p, d), E=25 MeV; measured deuteron and γ spectra, dγ-, γγ-coin, σ(θ) for deuterons using STARS and LIBERACE detector systems at LBNL facility. DWBA analysis of σ(θ) data. 153,155, 157Gd; deduced low-energy levels, J, π, Nilsson configurations, persistence of spherical shell structure.

doi: 10.1103/PhysRevC.88.031301
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2067. Data from this article have been entered in the XUNDL database. For more information, click here.


2012BU18      J.Phys.:Conf.Ser. 381, 012068 (2012)

M.Bunce, P.H.Regan, V.Werner, V.Anagnostatou, C.W.Beausang, M.Bowry, R.J.Casperson, D.Chen, N.Cooper, P.Goddard, R.O.Hughes, G.Ilie, P.J.R.Mason, B.Pauerstein, M.W.Reed, T.J.Ross

A shell model study of the high spin states of 88Y

NUCLEAR REACTIONS 74Ge(18O, 3np), E=60, 65, 70 MeV;76Ge(18O, 5np), E=90 MeV; measured prompt, delayed Eγ, Iγ(θ), γγ-coin using YRAST ball detector array consisting of 10 Compton-suppressed HPGe and including Doppler shift corrections, γ polarization using Compton polarimeter; calculated σ, σ(l) using PACE4, levels, J, π using NuShell code. 88Y deduced levels, J, π, γ transitions.

doi: 10.1088/1742-6596/381/1/012068
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2012HU01      Phys.Rev. C 85, 024613 (2012)

R.O.Hughes, C.W.Beausang, T.J.Ross, J.T.Burke, N.D.Scielzo, M.S.Basunia, C.M.Campbell, R.J.Casperson, H.L.Crawford, J.E.Escher, J.Munson, L.W.Phair, J.J.Ressler

Utilizing (p, d) and (p, t) reactions to obtain (n, f) cross sections in uranium nuclei via the surrogate-ratio method

NUCLEAR REACTIONS 236,238U(p, d), (p, t), E=28 MeV; measured E(d), I(d), E(t), I(t), fission spectra, (particle)(fission)-, (particle)γ-coin, fission fragment anisotropy ratios using STARS detector array at LBNL cyclotron facility; deduced σ[236U(n, F)]/σ[234U(n, F)], σ[235U(n, F)]/σ[233U(n, F)], σ[234U(n, F)]/σ[233U(n, F)], σ[236U(n, F)]/σ[235U(n, F)] reaction cross section ratios for E(n)=0-7 MeV. Surrogate-ratio method. Comparison with ENDF/B-VII evaluation.

doi: 10.1103/PhysRevC.85.024613
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14316.


2012HU14      J.Phys.:Conf.Ser. 381, 012064 (2012)

R.O.Hughes, C.W.Beausang, T.J.Ross, J.T.Burke, N.D.Scielzo, M.S.Basunia, C.M.Campbell, R.J.Casperson, H.L.Crawford, J.Munson, L.Phair, J.J.Ressler

To the continuum and beyond: Structure of U nuclei

NUCLEAR REACTIONS 236,238U(p, X), E=28 MeV; measured outgoing light ions using STARS Si telescope, (particle)(fission)-coin, Eγ, Iγ using Ge detectors of LIBERACE array, (particle)γ-coin; deduced σ(234U(n, f))/σ(236U(n, f)) ratio vs neutron energy using (p, dF) surrogate. 235,237U deduced levels, J, π, γ transitions.

doi: 10.1088/1742-6596/381/1/012064
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2012OK04      Phys.Rev. C 86, 054305 (2012)

Y.Oktem, D.L.Balabanski, B.Akkus, L.Amon Susam, L.Atanasova, C.W.Beausang, R.B.Cakirli, R.F.Casten, M.Danchev, M.Djongolov, E.Ganioglu, K.A.Gladnishki, J.Tm.Goon, D.J.Hartley, A.A.Hecht, R.Krucken, J.R.Novak, G.Rainovski, L.L.Riedinger, T.Venkova, I.Yigitoglu, N.V.Zamfir, O.Zeidan

Triaxial deformation and nuclear shape transition in 192Au

NUCLEAR REACTIONS 186W(11B, 5n), E=68 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO), linear polarization using YRAST Ball array at WNSL, Yale facility. 192Au; deduced high-spin levels, J, π, multipolarity, branching ratios, alignments, bands, B(M1)/B(E2), configurations. Comparisons with pairing and deformation self-consistent total Routhian surface (TRS), and cranked shell model (CSM) calculations.

doi: 10.1103/PhysRevC.86.054305
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2012RO14      Phys.Rev. C 85, 051304 (2012)

T.J.Ross, C.W.Beausang, R.O.Hughes, J.M.Allmond, C.T.Angell, M.S.Basunia, D.L.Bleuel, J.T.Burke, R.J.Casperson, J.E.Escher, P.Fallon, R.Hatarik, J.Munson, S.Paschalis, M.Petri, L.Phair, J.J.Ressler, N.D.Scielzo, I.J.Thompson

Measurement of the entry-spin distribution imparted to the high excitation continuum region of gadolinium nuclei via (p, d) and (p, t) reactions

NUCLEAR REACTIONS 154,158Gd(p, d), (p, t), E=25 MeV; measured particle and γ spectra, pγ-, dγ-, tγ-coin, σ(θ) using STARS-LIBERACE array; deduced entry spin distribution for the highly excited quasicontinuum in light-ion transfer reactions. DWBA analysis of σ(θ) data. 153,156Gd; deduced levels, J, π, l-transfer.

doi: 10.1103/PhysRevC.85.051304
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2071.


2012RO42      Phys.Rev. C 86, 067301 (2012)

T.J.Ross, C.W.Beausang, R.O.Hughes, N.D.Scielzo, J.T.Burke, J.M.Allmond, C.T.Angell, M.S.Basunia, D.L.Bleuel, R.J.Casperson, J.E.Escher, P.Fallon, R.Hatarik, J.Munson, S.Paschalis, M.Petri, L.Phair, J.J.Ressler

Spectroscopy of 88Y by the (p, dγ) reaction

NUCLEAR REACTIONS 89Y(p, d), E=25 MeV; measured E(d), I(d), Eγ, Iγ, dγ-coin, yields using STARS array for deuterons and LIBERACE array for γ rays at LBNL cyclotron facility. 88Y; deduced levels, branching ratios. 89Y(p, p'), (p, p'n), E=25 MeV; measured Ep, Ip, pγ-coin.

doi: 10.1103/PhysRevC.86.067301
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2012SC10      Phys.Rev. C 85, 054619 (2012)

N.D.Scielzo, J.E.Escher, J.M.Allmond, M.S.Basunia, C.W.Beausang, L.A.Bernstein, D.L.Bleuel, J.T.Burke, R.M.Clark, F.S.Dietrich, P.Fallon, J.Gibelin, B.L.Goldblum, S.R.Lesher, M.A.McMahan, E.B.Norman, L.Phair, E.Rodriguez-Vieitez, S.A.Sheets, I.J.Thompson, M.Wiedeking

Statistical γ rays in the analysis of surrogate nuclear reactions

NUCLEAR REACTIONS 154,155,156,158Gd(p, p'), E=21.7 MeV; measured Ep, Ip, Eγ, Iγ, pγ-coin using STARS-LiBerACE at LBNL cyclotron facility; deduced γ-ray emission probability. 155,157Gd(n, γ), E<3.5 MeV; deduced cross section ratios by surrogate analyses using statistical and discrete γ-rays. Comparison with reaction theory. Surrogate nuclear reaction technique.

doi: 10.1103/PhysRevC.85.054619
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14339.


2012WE13      J.Phys.:Conf.Ser. 366, 012048 (2012)

V.Werner, G.Ilie, D.Radeck, T.Ahn, C.W.Beausang, L.Bettermann, R.J.Casperson, R.Chevrier, N.Cooper, T.C.Bonniwell, A.Heinz, E.Holland, D.McCarthy, B.Pauerstein, M.K.Smith, J.R.Terry, E.Williams

Lifetime and magnetic moment measurements

NUCLEAR REACTIONS 24Mg(104Pd, 104Pd'), (106Pd, 106Pd'), (108Pd, 108Pd'), E=324, 330, 336 MeV; measured Coulomb excitation Eγ, Iγ using g-Plunger technique; deduced g-factor, T1/2. Compared with NNDC data.

doi: 10.1088/1742-6596/366/1/012048
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2011AN04      Acta Phys.Pol. B42, 807 (2011)

V.Anagnostatou, P.H.Regan, M.R.Bunce, D.McCarthy, V.Werner, T.Ahn, R.J.Casperson, R.Chevrier, N.Cooper, A.Heinz, G.Ilie, M.K.Smith, E.Williams, L.Bettermann, D.Radeck, C.W.Beausang, C.Boniwell, B.Pauerstein

Measurements of Picosecond Lifetimes in the Transitional Nucleus 100Pd Using the RDDM in Inverse Kinematics

NUCLEAR REACTIONS 24Mg(80Se, 4n)100Pd, E=268 MeV; measured fusion-evaporation products, Eγ, Iγ; deduced weak deformation, energies, J, π, B(E2), yrast sequence.

doi: 10.5506/APhysPolB.42.807
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2011BU11      J.Korean Phys.Soc. 59, 1892s (2011)

J.T.Burke, J.J.Ressler, J.E.Escher, N.D.Scielzo, I.J.Thompson, R.Henderson, J.Gostic, L.Bernstein, D.Bluel, M.Weideking, V.Meot, O.Roig, L.W.Phair, R.Hatarik, J.Munson, C.Angell, B.Goldblum, C.W.Beausang, T.Ross, R.Hughes, M.Aiche, G.Barreau, N.Cappelan, S.Czajkowski, B.Hass, B.Jurado, L.Mathieu, I.Companis

Experimental Approaches to Studying the Fission Process Using the Surrogate Reaction Technique

NUCLEAR REACTIONS 235,236U, 239Pu(α, α'), E=55 MeV; measured E(charged particle), I(charged particle), Eγ, Iγ(θ), γγ-coin, fission products using STARS (Silicon Telescope Array for Reaction Studies), LIBERACE, HYDRA; deduced σ 238Pu(n, F) below 20 MeV using surrogate reactions. Comparison with other data.

doi: 10.3938/jkps.59.1892
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2011RE09      Phys.Rev. C 83, 054610 (2011)

J.J.Ressler, J.T.Burke, J.E.Escher, C.T.Angell, M.S.Basunia, C.W.Beausang, L.A.Bernstein, D.L.Bleuel, R.J.Casperson, B.L.Goldblum, J.Gostic, R.Hatarik, R.Henderson, R.O.Hughes, J.Munson, L.W.Phair, T.J.Ross, N.D.Scielzo, E.Swanberg, I.J.Thompson, M.Wiedeking

Surrogate measurement of the 238Pu(n, f) cross section

NUCLEAR REACTIONS 239Pu(α, α'F), 235U(α, α'F), 236U(α, α'F), E=20-55 MeV; measured particle and fission fragment spectra, α-fission coincidences, cross sections, fission fragment anisotropy ratios. 238Pu, 234,235U(n, F), E=5-20 MeV; deduced fission cross sections using surrogate ratio method. Comparison with previous experimental data and evaluated libraries. Data needs for following reactions for next-generation reactors: 241Pu, 241,242Am, 243,244,245Cm(n, F), E.1 MeV. Potential surrogate and ratio reactions listed.

doi: 10.1103/PhysRevC.83.054610
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2010AL15      Phys.Rev. C 81, 064316 (2010)

J.M.Allmond, C.W.Beausang, J.O.Rasmussen, T.J.Ross, M.S.Basunia, L.A.Bernstein, D.L.Bleuel, W.Brooks, N.Brown, J.T.Burke, B.K.Darakchieva, K.R.Dudziak, K.E.Evans, P.Fallon, H.B.Jeppesen, J.D.LeBlanc, S.R.Lesher, M.A.McMahan, D.A.Meyer, L.Phair, N.D.Scielzo, S.R.Stroberg, M.Wiedeking

Particle-γ spectroscopy of the (p, d-γ)155Gd reaction: Neutron single-quasiparticle states at N=91

NUCLEAR REACTIONS 156Gd(p, d), E=25 MeV; measured Eγ, Iγ, Ed, Id, dγ-, dγγ-coin, γd(θ), σ. 155Gd; deduced levels, J, π, Nilsson configurations, L transfers, C2jl expansion coefficients, occupancies V2. DWBA analysis of σ(θ) data.

doi: 10.1103/PhysRevC.81.064316
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2010CL01      Phys.Lett. B 690, 19 (2010)

R.M.Clark, K.E.Gregorich, J.S.Berryman, M.N.Ali, J.M.Allmond, C.W.Beausang, M.Cromaz, M.A.Deleplanque, I.Dragojevic, J.Dvorak, P.A.Ellison, P.Fallon, M.A.Garcia, J.M.Gates, S.Gros, H.B.Jeppesen, D.Kaji, I.Y.Lee, A.O.Macchiavelli, K.Morimoto, H.Nitsche, S.Paschalis, M.Petri, L.Stavsetra, F.S.Stephens, H.Watanabe, M.Wiedeking

High-K multi-quasiparticle states in 254No

RADIOACTIVITY 254No(IT) [from 208Pb(48Ca, 2n), E=221 MeV]; measured Eγ, Iγ, γ-particle-coin.; deduced J, π, level energies, rotational bands, decay of isomer state.

doi: 10.1016/j.physletb.2010.04.079
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2010RE01      Phys.Rev. C 81, 014301 (2010)

J.J.Ressler, J.A.Caggiano, C.J.Francy, P.N.Peplowski, J.M.Allmond, C.W.Beausang, L.A.Bernstein, D.L.Bleuel, J.T.Burke, P.Fallon, A.A.Hecht, D.V.Jordan, S.R.Lesher, M.A.McMahan, T.S.Palmer, L.Phair, N.D.Scielzo, P.G.Swearingen, G.A.Warren, M.Wiedeking

Fission fragment isomers populated via 6Li+232Th

NUCLEAR REACTIONS 232Th(6Li, X), E=45 MeV; measured Eγ, Iγ, γγ-coin, particle spectra, (particle)γ-coin, (particle)γ-correlations using STARS Si array at LBNL and Ge detectors. 88Br, 93Rb, 95,98,99Y, 99Mo, 100Tc, 121,123In, 119,120,121,122,123,124,125,126,127Sn, 123,125,127,131Sb, 131I, 132Te, 134,136Xe; measured isomer half-lives; deduced levels, J, π. Level systematics of neighboring Sn, Sb and In nuclides.

RADIOACTIVITY 121m,123mIn(IT), 125mSb(IT); measured Eγ, Iγ, γγ-coin; deduced levels, J, π. 117Cd, 128Sb(β-); measured Eγ.

doi: 10.1103/PhysRevC.81.014301
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2010SC06      Phys.Rev. C 81, 034608 (2010)

N.D.Scielzo, J.E.Escher, J.M.Allmond, M.S.Basunia, C.W.Beausang, L.A.Bernstein, D.L.Bleuel, J.T.Burke, R.M.Clark, F.S.Dietrich, P.Fallon, J.Gibelin, B.L.Goldblum, S.R.Lesher, M.A.McMahan, E.B.Norman, L.Phair, E.Rodriquez-Vieitez, S.A.Sheets, I.J.Thompson, M.Wiedeking

Measurement of γ-emission branching ratios for 154, 156, 158Gd compound nuclei: Tests of surrogate nuclear reaction approximations for (n, γ) cross sections

NUCLEAR REACTIONS 154,156,158Gd(p, p'γ), E=22 MeV; measured Eγ, Iγ, proton spectra, γ-ray emission probabilities using STARS/LiBerACE array. 155,157Gd(n, γ), E=0.01-4 MeV; deduced σ by surrogate reaction method using Weisskopf-Ewing and ratio approximations.

doi: 10.1103/PhysRevC.81.034608
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2009AL13      Phys.Rev. C 79, 054610 (2009)

J.M.Allmond, L.A.Bernstein, C.W.Beausang, L.Phair, D.L.Bleuel, J.T.Burke, J.E.Escher, K.E.Evans, B.L.Goldblum, R.Hatarik, H.B.Jeppesen, S.R.Lesher, M.A.McMahan, J.O.Rasmussen, N.D.Scielzo, M.Wiedeking

Relative 235U(n, γ) and (n, f) cross sections from 235U(d, pγ) and (d, pf)

NUCLEAR REACTIONS 235U(d, pγ), (d, pf), E=21 MeV; measured Eγ, Iγ, proton spectra, fission spectra, σ. Internal surrogate ratio method (ISRM). Model-independent method used for measurement of γ-channel yield.

doi: 10.1103/PhysRevC.79.054610
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2009BA23      Nucl.Instrum.Methods Phys.Res. B267, 1899 (2009)

M.S.Basunia, R.M.Clark, B.L.Goldblum, L.A.Bernstein, L.Phair, J.T.Burke, C.W.Beausang, D.L.Bleuel, B.Darakchieva, F.S.Dietrich, M.Evtimova, P.Fallon, J.Gibelin, R.Hatarik, C.C.Jewett, S.R.Lesher, M.A.McMahan, E.Rodriguez-Vieitez, M.Wiedeking

The (3He, tf) as a surrogate reaction to determine (n, f) cross sections in the 10-20 MeV energy range

NUCLEAR REACTIONS 238U(3He, tf), E=10-20 MeV; Measured surrogate σ;237Np(n, f); Deduced σ. Compared results with ENDF/B-VII.0, JENDL-3.3 libraries.

doi: 10.1016/j.nimb.2009.04.006
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2009BE42      Phys.Rev. C 80, 057303 (2009)

Z.Berant, E.Oster, R.J.Casperson, A.Wolf, V.Werner, A.Heinz, R.F.Casten, G.Gurdal, E.A.McCutchan, D.S.Brenner, J.R.Terry, R.Winkler, E.Williams, J.Qian, A.Schmidt, M.K.Smith, T.Ahn, C.W.Beausang, P.H.Regan, T.Ross, M.Bunce, B.Darakchieva, D.A.Meyer, J.LeBlanc, K.Dudziak, C.Bauer, G.Henning

g factor of the 2+1 state of 172Hf

NUCLEAR MOMENTS 172Hf; measured g factor of first 2+ state using integral perturbed angular correlation method. Comparisons with g factors of neighboring even-even Hf nuclei and with predictions of several nuclear models including interacting boson approximation (IBA-2).

RADIOACTIVITY 172Ta(EC), (β+) [from 165Ho(12C, 5n), E=85 MeV]; measured Eγ, Iγ, γγ-coin, and cascade Iγ as a function of angle and magnetic field.

doi: 10.1103/PhysRevC.80.057303
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2009JE01      Phys.Rev. C 79, 031303 (2009)

H.B.Jeppesen, I.Dragojevic, R.M.Clark, K.E.Gregorich, M.N.Ali, J.M.Allmond, C.W.Beausang, D.L.Bleuel, M.Cromaz, M.A.Deleplanque, P.A.Ellison, P.Fallon, M.A.Garcia, J.M.Gates, J.P.Greene, S.Gros, I.Y.Lee, H.L.Liu, A.O.Macchiavelli, S.L.Nelson, H.Nitsche, J.R.Pavan, L.Stavsetra, F.S.Stephens, M.Wiedeking, R.Wyss, F.R.Xu

Multi-quasiparticle states in 256Rf

NUCLEAR REACTIONS 208Pb(50Ti, 2n), E=243 MeV; measured (recoil)(electron)(fission)-coin, (electron)γ-coin, conversion electron spectra, Eγ, Iγ, half-lives. 256Rf; deduced levels, J, π, high-K isomers, configurations. Comparisons with Woods-Saxon potential-energy surface calculations.

doi: 10.1103/PhysRevC.79.031303
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2009JE02      Phys.Rev. C 80, 034324 (2009)

H.B.Jeppesen, R.M.Clark, K.E.Gregorich, A.V.Afanasjev, M.N.Ali, J.M.Allmond, C.W.Beausang, M.Cromaz, M.A.Deleplanque, I.Dragojevic, J.Dvorak, P.A.Ellison, P.Fallon, M.A.Garcia, J.M.Gates, S.Gros, I.Y.Lee, A.O.Macchiavelli, S.L.Nelson, H.Nitsche, L.Stavsetra, F.S.Stephens, M.Wiedeking

High-K multi-quasiparticle states and rotational bands in 255103Lr

NUCLEAR REACTIONS 209Bi(48Ca, 2n), E=222 MeV; measured Eγ, Iγ, γγ, half-lives. 255Lr; deduced levels, J, π, bands, high-K 3qp isomers and configurations. Comparison with microscopic cranked relativistic Hartree-Bogoliubov (CRHB) calculations.

doi: 10.1103/PhysRevC.80.034324
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2009LE11      Phys.Rev. C 79, 044609 (2009)

S.R.Lesher, J.T.Burke, L.A.Bernstein, H.Ai, C.W.Beausang, D.L.Bleuel, R.M.Clark, F.S.Dietrich, J.E.Escher, P.Fallon, J.Gibelin, B.L.Goldblum, I.Y.Lee, A.O.Macchiavelli, M.A.McMahan, K.J.Moody, E.B.Norman, L.Phair, E.Rodriguez-Vieitez, N.D.Scielzo, M.Wiedeking

Surrogate ratio method in the actinide region using the (α, α'f) reaction

NUCLEAR REACTIONS 234,236U(α, α'f), E=55 MeV; measured fission spectra, α(fission)-coin, in-plane and out-of-plane fission ratios; deduced direct-reaction-induced fission probability ratio. 233,235U(n, f); compared cross sections. Comparison between fission probability ratio and ratio of cross sections. Surrogate ratio method (SRM). Application of SRM as a method of calculating unknown cross sections.

doi: 10.1103/PhysRevC.79.044609
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2008FI08      Phys.Rev. C 78, 034309 (2008)

C.R.Fitzpatrick, V.Werner, R.F.Casten, E.Williams, H.Ai, C.W.Beausang, R.B.Cakirli, G.Gurdal, A.Heinz, E.A.McCutchan, D.A.Meyer, E.Novitski, J.Qian, R.Winkler

Investigation into the B(E2) anomaly in 144Nd using Coulomb excitation

NUCLEAR REACTIONS 144Nd, 148Sm(48Ti, 48Ti'), E=130 MeV; measured Eγ, Iγ, σ; deduced B(E2) ratios. Coulomb excitation.

doi: 10.1103/PhysRevC.78.034309
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2008GR04      Nucl.Phys. A801, 83 (2008)

T.Grahn, A.Dewald, O.Moller, R.Julin, C.W.Beausang, S.Christen, I.G.Darby, S.Eeckhaudt, P.T.Greenlees, A.Gorgen, K.Helariutta, J.Jolie, P.Jones, S.Juutinen, H.Kettunen, T.Kroll, R.Krucken, Y.Le Coz, M.Leino, A.-P.Leppanen, P.Maierbeck, D.A.Meyer, B.Melon, P.Nieminen, M.Nyman, R.D.Page, J.Pakarinen, P.Petkov, P.Rahkila, B.Saha, M.Sandzelius, J.Saren, C.Scholey, J.Uusitalo, M.Bender, P.-H.Heenen

Lifetimes of intruder states in 186Pb, 188Pb and 194Po

NUCLEAR REACTIONS 106,108Pd, 114Cd(83Kr, 3n), E=340, 357, 375 MeV; measured Eγ, Iγ, γγ-, (recoil)γ-coin and lifetimes for intruder states using the recoil distance Doppler-shift method. 186,188Pb, 194Po; deduced B(E2), quadrupole moment and deformation parameters. JUROGAM array used with RITU, GREAT spectrometer. Recoil-decay tagging.

doi: 10.1016/j.nuclphysa.2008.01.002
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2008GU02      Phys.Rev. C 77, 024314 (2008)

G.Gurdal, C.W.Beausang, D.S.Brenner, H.Ai, R.F.Casten, B.Crider, A.Heinz, E.Williams, D.J.Hartley, M.P.Carpenter, A.A.Hecht, R.V.F.Janssens, T.Lauritsen, C.J.Lister, R.Raabe, D.Seweryniak, S.Zhu, J.X.Saladin

Measurement of conversion coefficients in normal and triaxial strongly deformed bands in 167Lu

NUCLEAR REACTIONS 123Sb(48Ca, 4n), E=203 MeV; measured Eγ, Iγ, conversion electrons; 167Lu; deduced conversion coefficients.

doi: 10.1103/PhysRevC.77.024314
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2008MC01      Phys.Rev. C 77, 054304 (2008)

E.A.McCutchan, R.F.Casten, V.Werner, E.Williams, R.Winkler, A.Wolf, Z.Berant, G.Gurdal, J.Qian, H.Ai, L.Amon, C.W.Beausang, D.S.Brenner, R.B.Cakirli, R.J.Casperson, C.R.Fitzpatrick, D.Frank, A.B.Garnsworthy, A.Heinz, R.Luttke, A.F.Mertz, Y.Oktem, N.Pietralla, P.H.Regan, B.Shoraka, J.R.Terry, N.J.Thompson

Enhanced mixing of intrinsic states in deformed Hf nuclei

RADIOACTIVITY 170,172,174Ta(β+), (EC) [from 159Tb(16O, 5n), E=100 MeV; 165Ho(12C, 5n), E=80 MeV; 168Er(11B, 5n), E=65 MeV]; measured Eγ, Iγ, γγ-coin, branching ratios. 170,172,174Hf; deduced levels, J, π. 166,168,170,172,174Hf; systematics.

doi: 10.1103/PhysRevC.77.054304
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2007BE33      Acta Phys.Pol. B38, 1535 (2007)

C.W.Beausang, S.R.Lesher, J.T.Burke, L.A.Bernstein, L.Phair, H.Ai, G.Gurdal, L.Ahle, D.S.Brenner, M.Carpenter, R.M.Clark, B.Crider, J.Escher, P.Fallon, J.P.Greene, D.J.Hartley, A.A.Hecht, R.V.F.Janssens, T.Lauritsen, I.Y.Lee, C.J.Lister, A.O.Macchiavelli, M.A.McMahan, C.Plettner, J.Rohrer, D.Seweryniak, E.Williams, S.Zhu

New Results on Fission Cross Sections in Actinide Nuclei Using the Surrogate Ratio Method and on Conversion Coefficients in Triaxial Strongly Deformed Bands in 167Lu from ICE Ball and Gammasphere

NUCLEAR REACTIONS 234,236U(α, α'f), E=55 MeV; measured Eα, fission fragment energy, (fission-fragment)α-coinc. Deduced fission probabilities. Compared results to ENDF data.

NUCLEAR REACTIONS 123Sb(48Ca, X)167Lu, E=203 MeV; measured Eγ, Iγ, conversion electron energies, γγ-coinc, (conversion-electron)γ-coinc. 167Lu deduced conversion coefficients.


2007GR27      Eur.Phys.J. Special Topics 150, 121 (2007)

T.Grahn, A.Dewald, O.Moller, R.Julin, C.W.Beausang, S.Christen, I.G.Darby, S.Eeckhaudt, P.T.Greenlees, A.Gorgen, K.Helariutta, J.Jolie, H.Kettunen, T.Kroll, R.Krucken, P.Jones, S.Juutinen, Y.Le Coz, M.Leino, A.-P.Leppanen, P.Maierbeck, B.Melon, D.A.Meyer, P.Nieminen, M.Nyman, R.Page, J.Pakarinen, P.Petkov, P.Rahkila, B.Saha, M.Sandzelius, J.Saren, C.Scholey, J.Uusitalo

Collectivity in neutron-deficient Pb and Po nuclei

doi: 10.1140/epjst/e2007-00282-8
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2007LY04      Phys.Rev. C 76, 014606 (2007); Erratum Phys.Rev. C 76, 019905 (2007)

B.F.Lyles, L.A.Bernstein, J.T.Burke, F.S.Dietrich, J.Escher, I.Thompson, D.L.Bleuel, R.M.Clark, P.Fallon, J.Gibelin, A.O.Macchiavelli, M.A.McMahan, L.Phair, E.Rodriguez-Vieitez, M.Wiedeking, C.W.Beausang, S.R.Lesher, B.Darakchieva, M.Evtimova

Absolute and relative surrogate measurements of the 236U(n, f) cross section as a probe of angular momentum effects

NUCLEAR REACTIONS 235,238U(3He, αf), E=42 MeV; measured fission fragment spectra in coincidence with α-particles. 236U(n, f), E< 20 MeV; deduced cross sections using the surrogate technique.

doi: 10.1103/PhysRevC.76.014606
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2007OK05      Phys.Rev. C 76, 044315 (2007); Erratum Phys.Rev. C 78, 069904 (2008)

Y.Oktem, D.L.Balabanski, B.Akkus, C.W.Beausang, M.Bostan, R.B.Cakirli, R.F.Casten, M.Danchev, M.Djongolov, M.N.Erduran, S.Erturk, K.A.Gladniski, G.Gurdal, J.Tm.Goon, D.J.Hartley, A.A.Hecht, R.Krucken, N.Nikolov, J.R.Novak, G.Rainovski, L.L.Riedinger, I.Yigitoglu, N.V.Zamfir, O.Zeidan

High-spin states in 191, 193Au and 192Pt: Evidence for oblate deformation and triaxial shapes

NUCLEAR REACTIONS 186W(11B, 4n), (11B, 4np), (11B, 6n), E=68 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ), linear polarization.191,193Au, 192Pt deduced levels, J, π; calculated deformation parameters using Particle-Plus-Triaxial Rotor model.

doi: 10.1103/PhysRevC.76.044315
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2007PR03      Phys.Rev. C 75, 014309 (2007)

F.M.Prados Estevez, A.M.Bruce, M.J.Taylor, H.Amro, C.W.Beausang, R.F.Casten, J.J.Ressler, C.J.Barton, C.Chandler, G.Hammond

Isospin purity of T = 1 states in the A = 38 nuclei studied via lifetime measurements in 38K

NUCLEAR REACTIONS 40Ca(d, α), E=4.5 MeV; measured Eγ, Iγ, γγ-, αγ-coin, DSA. 38K deduced levels, J, π, T1/2.

doi: 10.1103/PhysRevC.75.014309
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2007WO08      Phys.Rev. C 76, 047308 (2007)

A.Wolf, Z.Berant, A.Heinz, V.Werner, E.A.McCutchan, G.Gurdal, R.B.Cakirli, Y.Oktem, J.Ai, L.Amon, C.W.Beausang, D.S.Brenner, R.F.Casten, R.J.Casperson, K.Dusling, C.R.Fitzpatrick, A.B.Gransworthy, N.Pietralla, J.Qian, P.H.Regan, N.J.Thompson, E.Williams, R.Winkler

g factor of the 2+1 state of 170Hf

RADIOACTIVITY 170Ta(β+), (EC) [from 159Tb(16O, 5n), E=100 MeV]; measured Eγ, Iγ, γγ(θ) in static magnetic field. 170Hf; deduced levels, J, π, g-factor of first 2+ state.

doi: 10.1103/PhysRevC.76.047308
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2006GR16      Phys.Rev.Lett. 97, 062501 (2006)

T.Grahn, A.Dewald, O.Moller, R.Julin, C.W.Beausang, S.Christen, I.G.Darby, S.Eeckhaudt, P.T.Greenlees, A.Gorgen, K.Helariutta, J.Jolie, P.Jones, S.Juutinen, H.Kettunen, T.Kroll, R.Krucken, Y.Le Coz, M.Leino, A.-P.Leppanen, P.Maierbeck, D.A.Meyer, B.Melon, P.Nieminen, M.Nyman, R.D.Page, J.Pakarinen, P.Petkov, P.Rahkila, B.Saha, M.Sandzelius, J.Saren, C.Scholey, J.Uusitalo

Collectivity and Configuration Mixing in 186, 188Pb and 194Po

NUCLEAR REACTIONS 106Pd(83Kr, 3n), E=357 MeV; 108Pd(83Kr, 3n), E=340 MeV; 114Cd(83Kr, 3n), E=375 MeV; measured Doppler-shifted Eγ, Iγ, γγ-, (recoil)γ-coin. 186,188Pb, 194Po levels deduced T1/2, B(E2), transition quadrupole moments. configuration-mixing features. Jurogam array, recoil decay tagging, recoil-distance Doppler-shift technique.

doi: 10.1103/PhysRevLett.97.062501
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2006ME03      Phys.Rev. C 73, 024307 (2006)

D.A.Meyer, C.W.Beausang, J.J.Ressler, H.Ai, H.Amro, M.Babilon, R.F.Casten, C.R.Fitzpatrick, G.Gurdal, A.Heinz, E.A.McCutchan, C.Plettner, J.Qian, N.J.Thomas, V.Werner, E.Williams, N.V.Zamfir, J.Zhang

First investigation of excited states in the odd-proton nucleus 209Fr

NUCLEAR REACTIONS 176Yb(37Cl, 3n), (37Cl, 4n), (37Cl, 4np), E=173, 179, 185 MeV; measured prompt and delayed Eγ, Iγ, γγ-, (recoil)γ-coin; deduced excitation functions. 197Au(16O, 4n), (16O, 3n), E=90 MeV; measured Eγ, Iγ, γγ-coin. 209Fr deduced levels, J, π, configurations, isomer T1/2. 208Rn, 210Fr deduced isomers T1/2. Gas-filled spectrometer.

doi: 10.1103/PhysRevC.73.024307
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2006WI15      Phys.Rev. C 74, 024302 (2006)

E.Williams, C.Plettner, E.A.McCutchan, H.Levine, N.V.Zamfir, R.B.Cakirli, R.F.Casten, H.Ai, C.W.Beausang, G.Gurdal, A.Heinz, J.Qian, D.A.Meyer, N.Pietralla, V.Werner

Revisiting anomalous B(E2;4+1 → 2+1)/B(E2;2+1 → 0+1) values in 98Ru and 180Pt

NUCLEAR REACTIONS 27Al(98Ru, 98Ru'), E=289 MeV; measured Eγ, Iγ, γγ-coin following projectile Coulomb excitation. 98Ru deduced transitions B(E2). 122Sn(62Ni, 4n), E=265 MeV; measured Doppler-shifted Eγ, Iγ, γγ-coin. 180Pt deduced transitions T1/2, B(E2). Comparison with previous results, model predictions.

doi: 10.1103/PhysRevC.74.024302
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2005GR35      Eur.Phys.J. A 25, Supplement 1, 441 (2005)

T.Grahn, A.Dewald, O.Moller, C.W.Beausang, S.Eeckhaudt, P.T.Greenlees, J.Jolie, P.Jones, R.Julin, S.Juutinen, H.Kettunen, T.Kroll, R.Krucken, M.Leino, A.-P.Leppanen, P.Maierbeck, D.A.Meyer, P.Nieminen, M.Nyman, J.Pakarinen, P.Petkov, P.Rahkila, B.Saha, C.Scholey, J.Uusitalo

RDDS lifetime measurement with JUROGAM + RITU

NUCLEAR REACTIONS 108Pd(83Kr, 3n), E=340 MeV; measured Doppler-shifted Eγ, Iγ, (recoil)γ-coin. 188Pb levels deduced T1/2, B(E2), deformation. Jurogam array, mass separator, recoil-distance technique.

doi: 10.1140/epjad/i2005-06-024-2
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2005GU28      J.Phys.(London) G31, S1873 (2005)

G.Gurdal, H.Amro, C.W.Beausang, D.S.Brenner, M.P.Carpenter, R.F.Casten, C.Engelhardt, G.B.Hagemann, C.R.Hansen, D.J.Hartley, B.Herskind, H.Hubel, T.L.Khoo, T.Lauritsen, W.C.Ma, D.A.Meyer, E.F.Moore, A.Neusser, P.Bringel, D.G.Roux, G.Sletten, R.B.Yadav, Y.Zhang

Quadrupole moment measurements of TSD1 and TSD2 bands in 167Lu

NUCLEAR REACTIONS 123Sb(48Ca, 4n), E=203 MeV; measured Eγ, Iγ, γγ-coin, DSA. 167Lu deduced triaxial superdeformed band transition quadrupole moment. Gammasphere array.

doi: 10.1088/0954-3899/31/10/091
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2005MC01      Phys.Rev. C 71, 024309 (2005)

E.A.McCutchan, N.V.Zamfir, R.F.Casten, M.A.Caprio, H.Ai, H.Amro, C.W.Beausang, A.A.Hecht, D.A.Meyer, J.J.Ressler

γ-ray spectroscopy of 166Hf: X(5) in N > 90?

RADIOACTIVITY 166Hf(β+), (EC) [from 159Tb(16O, 9n)]; measured Eγ, Iγ, γγ-coin. 166Hf deduced levels, J, π, X(5) symmetry features.

NUCLEAR STRUCTURE 150Nd, 152Sm, 154Gd, 156Dy, 162Yb, 166Hf, 170W, 176Os; analyzed levels, J, π, B(E2), X(5) symmetry features.

doi: 10.1103/PhysRevC.71.024309
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2005PL03      Phys.Rev. C 71, 051602 (2005)

C.Plettner, H.Ai, C.W.Beausang, L.A.Bernstein, L.Ahle, H.Amro, M.Babilon, J.T.Burke, J.A.Caggiano, R.F.Casten, J.A.Church, J.R.Cooper, B.Crider, G.Gurdal, A.Heinz, E.A.McCutchan, K.Moody, J.A.Punyon, J.Qian, J.J.Ressler, A.Schiller, E.Williams, W.Younes

Estimation of (n, f) cross sections by measuring reaction probability ratios

NUCLEAR REACTIONS 236,238U(d, pF), (d, d'F), E=24, 32 MeV; measured fission probability ratios. Comparison with results from neutron-induced reactions.

doi: 10.1103/PhysRevC.71.051602
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2005PL05      J.Phys.(London) G31, S1573 (2005)

C.Plettner, H.Ai, C.W.Beausang, L.A.Bernstein, L.Ahle, H.Amro, M.Babilon, J.T.Burke, J.A.Caggiano, R.F.Casten, J.A.Church, J.R.Cooper, B.Crider, G.Gurdal, A.Heinz, E.A.McCutchan, K.Moody, J.A.Punyon, J.Qian, J.J.Ressler, A.Schiller, E.Williams, W.Younes

Measuring reaction probability ratios to simulate neutron-induced cross-sections of short-lived nuclei

NUCLEAR REACTIONS 236,238U(d, d'F), (d, pF), E=24, 32 MeV; measured fragment yields; deduced fission probability ratios vs excitation energy. Surrogate method for neutron-induced fission cross-section determination.

doi: 10.1088/0954-3899/31/10/035
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2005RE02      Phys.Rev. C 71, 014302 (2005)

J.J.Ressler, C.W.Beausang, H.Ai, H.Amro, M.Babilon, J.A.Caggiano, R.F.Casten, G.Gurdal, A.Heinz, R.O.Hughes, E.A.McCutchan, D.A.Meyer, C.Plettner, J.Qian, M.J.S.Sciacchitano, N.J.Thomas, E.Williams, N.V.Zamfir

Isomeric decay of 208Ra

NUCLEAR REACTIONS 182W(30Si, 4n), E=151 MeV; measured delayed Eγ, Iγ, (recoil)γ-coin. 208Ra deduced levels, J, π, isomeric state T1/2. 182,183,184,186W(30Si, X)210Ra/209Ra/208Ra/209Fr, E=151 MeV; measured delayed Eγ, Iγ, (recoil)γ-coin. 209Fr, 209,210Ra deduced transitions. Level systematics in neighboring nuclides discussed.

doi: 10.1103/PhysRevC.71.014302
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2005RE23      J.Phys.(London) G31, S1605 (2005)

J.J.Ressler, C.W.Beausang, R.F.Casten, N.V.Zamfir, H.Ai, H.Amro, M.Babilon, R.B.Cakirli, J.A.Caggiano, G.Gurdal, A.Heinz, R.O.Hughes, S.D.Langdown, E.A.McCutchan, D.A.Meyer, C.Plettner, J.Qian, P.H.Regan, M.J.S.Sciacchitano, N.J.Thomas, E.Williams, A.Yamamoto

Isomers and seniority in the trans-Pb nuclei

NUCLEAR REACTIONS 182,184W(30Si, 4n), E=148 MeV; measured delayed Eγ, Iγ, γγ-, (recoil)γ-coin. 208,210Ra deduced levels, J, π, isomers T1/2, B(E2). Mass separator.

doi: 10.1088/0954-3899/31/10/041
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2004BA91      Phys.Rev. C 70, 044305 (2004)

D.L.Balabanski, M.Danchev, D.J.Hartley, L.L.Riedinger, O.Zeidan, J.Zhang, C.J.Barton, C.W.Beausang, M.A.Caprio, R.F.Casten, J.R.Cooper, A.A.Hecht, R.Krucken, J.R.Novak, N.V.Zamfir, K.E.Zyromski

Possible assignment of chiral twin bands in 188Ir

NUCLEAR REACTIONS 186W(7Li, 5n), E=52 MeV; measured Eγ, Iγ, γγ-coin. 188Ir deduced high-spin levels, J, π, configurations, B(M1)/B(E2), chiral twin bands. Tilted-axis cranking calculations, level systematics in neighboring isotopes discussed.

doi: 10.1103/PhysRevC.70.044305
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2004BE13      Phys.Rev. C 69, 034320 (2004)

Z.Berant, A.Wolf, N.V.Zamfir, M.A.Caprio, D.S.Brenner, N.Pietralla, R.L.Gill, R.F.Casten, C.W.Beausang, R.Krucken, C.J.Barton, J.R.Cooper, A.A.Hecht, D.M.Johnson, J.R.Novak, H.Cheng, B.F.Albanna, G.Gurdal

g factor of the 2+1 state of 164Yb

RADIOACTIVITY 164Lu(EC) [from 155Gd(14N, 5n)]; measured Eγ, Iγ(θ, H), γγ-coin. 164Yb level deduced g factor. Comparison with model predictions. Systematic trends discussed.

doi: 10.1103/PhysRevC.69.034320
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2004CA42      Phys.Rev. C 70, 044312 (2004)

R.B.Cakirli, R.F.Casten, E.A.McCutchan, H.Ai, H.Amro, M.Babilon, C.W.Beausang, A.Heinz, R.O.Hughes, D.A.Meyer, C.Plettner, J.J.Ressler, N.V.Zamfir

Breakdown of vibrational structure in 98Ru

NUCLEAR REACTIONS 96Mo(α, 2n), E=24, 26, 28, 30 MeV; measured Eγ, Iγ, γγ-coin. 98Ru deduced levels, J, π, breakdown of vibrational structure.

doi: 10.1103/PhysRevC.70.044312
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2004MC01      Phys.Rev. C 69, 024308 (2004)

E.A.McCutchan, N.V.Zamfir, M.A.Caprio, R.F.Casten, H.Amro, C.W.Beausang, D.S.Brenner, A.A.Hecht, C.Hutter, S.D.Langdown, D.A.Meyer, P.H.Regan, J.J.Ressler, A.D.Yamamoto

Low spin states in 162Yb and the X(5) critical point symmetry

RADIOACTIVITY 162Lu(β+), (EC) [from 147Sm(19F, 4n)]; measured Eγ, Iγ, γγ-coin. 162Yb deduced levels, J, π, symmetry features.

doi: 10.1103/PhysRevC.69.024308
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2004RE03      Phys.Rev. C 69, 034317 (2004)

J.J.Ressler, R.F.Casten, N.V.Zamfir, C.W.Beausang, R.B.Cakirli, H.Ai, H.Amro, M.A.Caprio, A.A.Hecht, A.Heinz, S.D.Langdown, E.A.McCutchan, D.A.Meyer, C.Plettner, P.H.Regan, M.J.S.Sciacchitano, A.D.Yamamoto

Transition from the seniority regime to collective motion

NUCLEAR STRUCTURE 92Mo, 94Ru, 96Pd, 98Cd, 118,120,122,124,126Sn, 148Dy, 150Er, 152Yb, 154Hf, 202,204,206,208,210,212Po, 204,206,208,210,212,214Rn, 206,208,210,212,214,216Ra; analyzed B(E2); deduced signature for transition to collective motion.

doi: 10.1103/PhysRevC.69.034317
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2004RE04      Phys.Rev. C 69, 034331 (2004)

J.J.Ressler, C.W.Beausang, H.Ai, H.Amro, M.A.Caprio, R.F.Casten, A.A.Hecht, S.D.Langdown, E.A.McCutchan, D.A.Meyer, P.H.Regan, M.J.S.Sciacchitano, A.Yamamoto, N.V.Zamfir

Isomer decay tagging in the heavy nuclei: 210Ra and 209Ra

NUCLEAR REACTIONS 184W(30Si, 4n), (30Si, 5n), E=148 MeV; measured prompt and delayed Eγ, Iγ, γγ-, (recoil)γ-coin. 209,210Ra deduced levels, J, π, configurations, isomers T1/2. Gas-filled spectrometer, isomer decay tagging.

doi: 10.1103/PhysRevC.69.034331
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2003AP01      Phys.Rev. C 67, 034309 (2003)

D.E.Appelbe, C.J.Barton, M.H.Muikku, J.Simpson, D.D.Warner, C.W.Beausang, M.A.Caprio, J.R.Cooper, J.R.Novak, N.V.Zamfir, R.A.E.Austin, J.A.Cameron, C.Malcolmson, J.C.Waddington, F.R.Xu

Detailed γ-ray spectroscopy of 55Cr and 56Cr: Confirmation of the subshell closure at N=32

NUCLEAR REACTIONS 48Ca(11B, 2np), (11B, 3np), E=35-40 MeV; measured Eγ, Iγ, γγ-coin. 55,56Cr deduced high-spin levels, J, π, configurations. Total Routhian surface calculations. Level systematics and shell features in neighboring nuclides discussed.

doi: 10.1103/PhysRevC.67.034309
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2003BA01      Phys.Lett. 551B, 269 (2003)

C.J.Barton, M.A.Caprio, D.Shapira, N.V.Zamfir, D.S.Brenner, R.L.Gill, T.A.Lewis, J.R.Cooper, R.F.Casten, C.W.Beausang, R.Krucken, J.R.Novak

B(E2) values from low-energy Coulomb excitation at an ISOL facility: the N = 80, 82 Te isotopes

NUCLEAR REACTIONS C(130Te, 130Te'), (132Te, 132Te'), (134Te, 134Te'), E=350 MeV; measured Eγ, Iγ, (particle)γ-coin following projectile Coulomb excitation. 130,132,134Te deduced transitions B(E2).

doi: 10.1016/S0370-2693(02)03066-6
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2003BA18      Phys.Rev. C 67, 034310 (2003)

C.J.Barton, D.S.Brenner, N.V.Zamfir, M.A.Caprio, A.Aprahamian, M.C.Wiescher, C.W.Beausang, Z.Berant, R.F.Casten, J.R.Cooper, R.L.Gill, R.Krucken, J.R.Novak, N.Pietralla, M.Shawcross, A.Teymurazyan, A.Wolf

Mass measurement of 80Y by β-γ coincidence spectroscopy

RADIOACTIVITY 80Y(EC), (β+) [from 58Ni(28Si, npα)]; measured Eγ, Eβ, βγ-coin; deduced Q(EC). 80Sr deduced transitions. Implications for astrophysical rp-process simulations discussed.

doi: 10.1103/PhysRevC.67.034310
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2003CA03      Eur.Phys.J. A 16, 177 (2003)

M.A.Caprio, N.V.Zamfir, E.A.McCutchan, R.F.Casten, Z.Berant, H.Amro, C.J.Barton, C.W.Beausang, D.S.Brenner, J.R.Cooper, R.L.Gill, G.Gurdal, A.A.Hecht, C.Hutter, R.Krucken, D.A.Meyer, J.R.Novak, N.Pietralla, P.H.Regan, J.J.Ressler

Measurement of 2+1 level lifetimes in 162Yb and 162Er by fast electronic scintillation timing

RADIOACTIVITY 162Lu(β+), (EC) [from 147Sm(19F, 4n)]; 162Tm(β+), (EC) [from 155Gd(12C, 5n), and subsequent decay]; measured Eγ, Iγ(t), γγ-, βγ-coin. 162Yb, 162Er levels deduced T1/2. Fast electronic scintillation timing, comparison with previous results.

doi: 10.1140/epja/i2002-10086-8
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2003CA23      Phys.Rev. C 67, 064306 (2003)

R.F.Casten, E.A.McCutchan, N.V.Zamfir, C.W.Beausang, J.Zhang

Wobbling motion: A γ-rigid or γ-soft mode?

doi: 10.1103/PhysRevC.67.064306
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2003DA34      Phys.Rev. C 68, 054307 (2003)

M.Danchev, D.L.Balabanski, I.Yigitoglu, B.Akkus, C.W.Beausang, M.Bostan, R.F.Casten, M.K.Djongolov, M.N.Erduran, S.Erturk, K.A.Gladnishki, G.Gurdal, J.TM.Goon, D.J.Hartley, A.A.Hecht, R.Krucken, J.R.Novak, Y.Oktem, G.Rainovski, L.L.Riedinger, N.V.Zamfir, O.Zeidan

Delayed backbending in the πh9/2 band of 187Ir

NUCLEAR REACTIONS 176Yb(15N, 4n), E=82 MeV; measured Eγ, Iγ, γγ-coin. 187Ir deduced high-spin levels, J, π, configurations. Rotational band systematics in neighboring nuclides discussed.

doi: 10.1103/PhysRevC.68.054307
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2003DE24      Phys.Rev. C 68, 034314 (2003)

A.Dewald, R.Peusquens, B.Saha, P.von Brentano, A.Fitzler, T.Klug, I.Wiedenhover, M.P.Carpenter, A.Heinz, R.V.F.Janssens, F.G.Kondev, C.J.Lister, D.Seweryniak, K.Abu Saleem, R.Krucken, J.R.Cooper, C.J.Barton, K.Zyromski, C.W.Beausang, Z.Wang, P.Petkov, A.M.Oros-Peusquens, U.Garg, S.Zhu

Recoil-gated plunger lifetime measurements in 188Pb

NUCLEAR REACTIONS 40Ca(152Sm, 4n), E=805 MeV; measured Doppler-shifted Eγ, Iγ, γγ-, (recoil)γ-coin. 188Pb levels deduced T1/2, B(E2), deformation, collectivity. Recoil-distance technique, Gammasphere array, mass separator. Three-band mixing calculation.

doi: 10.1103/PhysRevC.68.034314
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2003HE25      Phys.Rev. C 68, 054310 (2003)

A.A.Hecht, C.W.Beausang, H.Amro, C.J.Barton, Z.Berant, M.A.Caprio, R.F.Casten, J.R.Cooper, D.J.Hartley, R.Krucken, D.A.Meyer, H.Newman, J.R.Novak, N.Pietralla, J.J.Ressler, A.Wolf, N.V.Zamfir, J.-Y.Zhang, K.E.Zyromski

Evidence for chiral symmetry breaking in 140Eu?

NUCLEAR REACTIONS 92Mo(51V, n2p), E=205 MeV; measured Eγ, Iγ, γγ-, (X-ray)γ-coin. 140Eu deduced high-spin levels, J, π, configurations, B(M1)/B(E2), possible chiral symmetry breaking. Cranked mean field and total Routhian surface calculations. Rotational band systematics in neighboring nuclides discussed.

doi: 10.1103/PhysRevC.68.054310
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2003HU07      Phys.Rev. C 67, 054315 (2003)

C.Hutter, R.Krucken, A.Aprahamian, C.J.Barton, C.W.Beausang, M.A.Caprio, R.F.Casten, W.-T.Chou, R.M.Clark, D.Cline, J.R.Cooper, M.Cromaz, A.A.Hecht, A.O.Macchiavelli, N.Pietralla, M.Shawcross, M.A.Stoyer, C.Y.Wu, N.V.Zamfir

B(E2) values and the search for the critical point symmetry X(5) in 104Mo and 106Mo

RADIOACTIVITY 252Cf(SF); measured Doppler-shifted Eγ, Iγ, γγ-coin. 104,106Mo deduced levels T1/2, B(E2), transition quadrupole moments. Recoil-distance technique, Gammasphere array, comparison with model predictions.

doi: 10.1103/PhysRevC.67.054315
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2003KU11      Phys.Lett. B 562, 193 (2003)

G.Kumbartzki, N.Benczer-Koller, J.Holden, G.Jakob, T.J.Mertzimekis, M.J.Taylor, K.-H.Speidel, R.Ernst, A.E.Stuchbery, C.W.Beausang, R.Krucken

Competition between proton and neutron excitations in 96Zr

NUCLEAR REACTIONS C, 24Mg, Cu, Gd, Ta(96Zr, 96Zr'), E=265-274 MeV; measured Eγ, Iγ(θ, H, t), DSA following projectile Coulomb excitation. 96Zr levels deduced T1/2, g factors, configurations, transition B(E3). Transient field technique, comparison with shell model results.

doi: 10.1016/S0370-2693(03)00608-7
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2003RE10      Phys.Rev.Lett. 90, 152502 (2003)

P.H.Regan, C.W.Beausang, N.V.Zamfir, R.F.Casten, J.-Y.Zhang, A.D.Yamamoto, M.A.Caprio, G.Gurdal, A.A.Hecht, C.Hutter, R.Krucken, S.D.Langdown, D.A.Meyer, J.J.Ressler

Signature for Vibrational to Rotational Evolution Along the Yrast Line

NUCLEAR REACTIONS 96Zr(9Be, 3n), E=44 MeV; measured Eγ, Iγ, γγ-coin. 102Ru deduced high-spin levels, J, π, evolution from vibrational to rotational structure.

NUCLEAR STRUCTURE 98,100,102,104,106,108Mo, 100,102,104,106,108,110Ru, 102,104,106,108,110,112Pd, 104,106,108,110,112,114Cd; analyzed transition energies vs spin; deduced evolution from vibrational to rotational behavior.

doi: 10.1103/PhysRevLett.90.152502
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2003TA05      Phys.Lett. B 559, 187 (2003)

M.J.Taylor, N.Benczer-Koller, G.Kumbartzki, T.J.Mertzimekis, S.J.Q.Robinson, Y.Y.Sharon, L.Zamick, A.E.Stuchbery, C.Hutter, C.W.Beausang, J.J.Ressler, M.A.Caprio

Competing core and single particle excitations in the 2+1 state in 44Ca

NUCLEAR REACTIONS C, Cu, Gd(44Ca, 44Ca'), E=85, 90, 95 MeV; measured Eγ, Iγ(θ, H, t), (particle)γ-coin following projectile Coulomb excitation. 44Ca level deduced g factor, configuration. Transient field technique.

doi: 10.1016/S0370-2693(03)00346-0
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2002AP04      Phys.Rev. C66, 044305 (2002)

D.E.Appelbe, P.J.Twin, C.W.Beausang, D.M.Cullen, D.Curien, G.Duchene, S.Erturk, Ch.Finck, B.Haas, E.S.Paul, D.C.Radford, C.Rigollet, M.B.Smith, O.Stezowski, J.C.Waddington, A.N.Wilson

Evidence for triaxial deformation near N = 86: Collective bands in 152, 153Dy and 153Ho

NUCLEAR REACTIONS 120Sn(37Cl, 4n), E=177 MeV; 124Sn(34S, 5n), E=182 MeV; measured Eγ, Iγ, γγ-coin. 153Ho, 153Dy deduced high-spin levels, J, π, configurations, triaxial deformation. Eurogam II array, cranked mean-field calculations.

NUCLEAR STRUCTURE 152Dy; analyzed data; deduced triaxial superdeformed band. Cranked mean-field analysis.

doi: 10.1103/PhysRevC.66.044305
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2002CA49      Phys.Rev. C 66, 054310 (2002)

M.A.Caprio, N.V.Zamfir, R.F.Casten, C.J.Barton, C.W.Beausang, J.R.Cooper, A.A.Hecht, R.Krucken, H.Newman, J.R.Novak, N.Pietralla, A.Wolf, K.E.Zyromski

Low-spin structure of 156Dy through γ-ray spectroscopy

RADIOACTIVITY 156Er, 156Ho(β+), (EC) [from 148Sm(12C, 4n) and subsequent decay]; measured Eγ, Iγ, γγ-coin. 156Dy deduced levels, J, π, B(E2), feeding intensities. Comparisons with neighboring isotones and with model predictions.

doi: 10.1103/PhysRevC.66.054310
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2002KA01      Nucl.Phys. A697, 3 (2002)

M.Kaci, M.-G.Porquet, I.Deloncle, M.Aiche, F.Azaiez, G.Bastin, C.W.Beausang, C.Bourgeois, R.M.Clark, R.Duffait, J.Duprat, B.J.P.Gall, F.Hannachi, K.Hauschild, M.J.Joyce, A.Korichi, Y.Le Coz, M.Meyer, E.S.Paul, N.Perrin, N.Poffe, N.Redon, C.Schuck, H.Sergolle, J.F.Sharpey-Schafer, J.Simpson, A.G.Smith, R.Wadsworth

Multiparticle Excitations in 194Pb

NUCLEAR REACTIONS 184W(16O, 6n), E=113 MeV; measured Eγ, Iγ, angular distribution, γγ-coin. 194Pb deduced high-spin levels, J, π, B(M1)/B(E2) ratios, dipole bands, multiparticle configurations. Eurogam array.

doi: 10.1016/S0375-9474(01)01225-8
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2002KR09      Phys.Rev.Lett. 88, 232501 (2002)

R.Krucken, B.Albanna, C.Bialik, R.F.Casten, J.R.Cooper, A.Dewald, N.V.Zamfir, C.J.Barton, C.W.Beausang, M.A.Caprio, A.A.Hecht, T.Klug, J.R.Novak, N.Pietralla, P.von Brentano

B(E2) Values in 150Nd and the Critical Point Symmetry X(5)

NUCLEAR REACTIONS 150Nd(32S, 32S'), E=132 MeV; measured Eγ, Iγ, (particle)γ-coin, Doppler-shifted spectra following Coulomb excitation. 150Nd deduced levels T1/2, B(E2), symmetry features. Recoil-distance method.

doi: 10.1103/PhysRevLett.88.232501
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2002PI04      Phys.Rev. C65, 024317 (2002)

N.Pietralla, R.Krucken, C.J.Barton, C.W.Beausang, M.A.Caprio, R.F.Casten, J.R.Cooper, A.A.Hecht, J.R.Novak, N.V.Zamfir, A.Lisetskiy, A.Schmidt

Lifetimes of Quasideuteron Configurations in the Odd-Odd N = Z Nucleus 2550Mn25

NUCLEAR REACTIONS 40Ca(12C, np), E=27 MeV; measured Eγ, Iγ, γγ-coin, DSA. 50Mn deduced levels, J, π, T1/2, B(M1), B(E2), quasideuteron configurations. Comparison with shell-model predictions.

doi: 10.1103/PhysRevC.65.024317
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2002WO10      Phys.Rev. C66, 024323 (2002)

A.Wolf, N.V.Zamfir, M.A.Caprio, Z.Berant, D.S.Brenner, N.Pietralla, R.L.Gill, R.F.Casten, C.W.Beausang, R.Kruecken, K.E.Zyromski, C.J.Barton, J.R.Cooper, A.A.Hecht, H.Newman, J.R.Novak, J.Cederkall

Structure of low-lying states in 128Ba from γ-γ angular correlations and polarization measurements

RADIOACTIVITY 128La(EC) [from 116Sn(16O, 3np)]; measured Eγ, Iγ, γγ-coin, γ-ray polarization. 128Ba deduced levels, J, π, B(E2). Comparison with model predictions.

doi: 10.1103/PhysRevC.66.024323
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2002YA13      Phys.Rev. C66, 024302 (2002)

A.D.Yamamoto, P.H.Regan, C.W.Beausang, F.R.Xu, M.A.Caprio, R.F.Casten, G.Gurdal, A.A.Hecht, C.Hutter, R.Krucken, S.D.Langdown, D.Meyer, J.J.Ressler, N.V.Zamfir

High-j proton and neutron alignments in γ-soft 101Ru

NUCLEAR REACTIONS 96Zr(9Be, 4n), E ≈ 44 MeV; measured Eγ, Iγ, γγ-coin. 101Ru deduced high-spin levels, J, π, configurations. Total Routhian surface calculations, comparisons with previous results.

doi: 10.1103/PhysRevC.66.024302
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2002ZA04      Phys.Rev. C65, 044325 (2002)

N.V.Zamfir, M.A.Caprio, R.F.Casten, C.J.Barton, C.W.Beausang, Z.Berant, D.S.Brenner, W.T.Chou, J.R.Cooper, A.A.Hecht, R.Krucken, H.Newman, J.R.Novak, N.Pietralla, A.Wolf, K.E.Zyromski

102Pd: An E(5) nucleus ?

RADIOACTIVITY 102Ag(β+), (EC) [from 89Y(16O, 3n)]; measured Eγ, Iγ. 102Pd deduced levels, J, π, symmetry features.

doi: 10.1103/PhysRevC.65.044325
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2002ZA07      Phys.Rev. C65, 067305 (2002)

N.V.Zamfir, H.G.Borner, N.Pietralla, R.F.Casten, Z.Berant, C.J.Barton, C.W.Beausang, D.S.Brenner, M.A.Caprio, J.R.Cooper, A.A.Hecht, M.Krticka, R.Krucken, P.Mutti, J.R.Novak, A.Wolf

Lifetime and B(E2) Values for the 31+ Level in 152Sm

NUCLEAR REACTIONS 151Sm(n, γ), E=reactor; measured Doppler-broadened Eγ, Iγ. 152Sm level deduced T1/2, B(E2), phase coexistence. Gamma-ray induced Doppler broadening technique.

RADIOACTIVITY 152Eu(EC); measured γγ-coin, γ-ray polarization. 152Sm transition deduced δ.

doi: 10.1103/PhysRevC.65.067305
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2001BE10      Nucl.Phys. A682, 394c (2001)

C.W.Beausang, A.A.Hecht, K.E.Zyromski, D.Balabanski, C.J.Barton, M.A.Caprio, R.F.Casten, J.R.Cooper, D.Hartley, R.Krucken, J.R.Novak, N.V.Zamfir, J.-Y.Zhang, F.Donau

Evidence for Chiral Symmetry in the Mass A ∼ 130 Region

NUCLEAR REACTIONS 116Sn(24Mg, 3np), E=130, 135 MeV; 106Cd(35Cl, n2p), E=150 MeV; measured Eγ, Iγ, γγ-coin. 136Pm, 138Eu deduced high-spin levels, J, π, possible chiral twin bands.

doi: 10.1016/S0375-9474(00)00665-5
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2001CO19      Phys.Rev.Lett. 87, 132503 (2001)

J.R.Cooper, R.Krucken, C.W.Beausang, J.R.Novak, A.Dewald, T.Klug, G.Kemper, P.von Brentano, M.P.Carpenter, R.V.F.Janssens, C.J.Lister, I.Wiedenhover

Crossing of Shears Bands in 197Pb: B(M1) Values and Semiclassical Description

NUCLEAR REACTIONS 176Yb(26Mg, 5n), E=130 MeV; measured Doppler-shifted Eγ, Iγ, γγ-coin. 197Pb levels deduced T1/2, B(M1), shears band features. Gammasphere array, recoil distance technique.

doi: 10.1103/PhysRevLett.87.132503
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2001HE15      Phys.Rev. C63, 051302 (2001)

A.A.Hecht, C.W.Beausang, K.E.Zyromski, D.L.Balabanski, C.J.Barton, M.A.Caprio, R.F.Casten, J.R.Cooper, D.J.Hartley, R.Krucken, D.Meyer, H.Newman, J.R.Novak, E.S.Paul, N.Pietralla, A.Wolf, N.V.Zamfir, J.-Y.Zhang, F.Donau

Evidence for Chiral Symmetry Breaking in 136Pm and 138Eu

NUCLEAR REACTIONS 116Sn(24Mg, 3np), E=130, 135 MeV; 106Cd(35Cl, n2p), E=150 MeV; measured Eγ, Iγ, γγ-coin, γ-ray polarization. 136Pm, 138Eu deduced high-spin levels, J, π, configurations, B(M1)/B(E2), chiral twin bands. Comparison with tilted axis cranking model calculations. Yrast ball, Eurogam I arrays.

doi: 10.1103/PhysRevC.63.051302
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2001HO02      Phys.Rev. C63, 024315 (2001)

J.Holden, N.Benczer-Koller, G.Jakob, G.Kumbartzki, T.J.Mertzimekis, K.-H.Speidel, C.W.Beausang, R.Krucken, A.Macchiavelli, M.McMahan, L.Phair, A.E.Stuchbery, P.Maier-Komor, W.Rogers, A.D.Davies

Single Particle Degrees of Freedom in the Transition from Deformed to Spherical Nd Nuclei

NUCLEAR REACTIONS Si, Ni(144Nd, 144Nd'), (146Nd, 146Nd'), (148Nd, 148Nd'), (150Nd, 150Nd'), E=285, 584-608 MeV; measured Eγ, Iγ(θ, H, t), (particle)γ-coin following projectile Coulomb excitation. 144,146,148,150Nd levels deduced g factors, configurations. Transient field technique.

doi: 10.1103/PhysRevC.63.024315
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2001KR13      Phys.Rev. C64, 017305 (2001)

R.Krucken, W.-T.Chou, J.R.Cooper, C.W.Beausang, C.J.Barton, M.A.Caprio, R.F.Casten, A.A.Hecht, J.R.Novak, N.Pietralla, A.Wolf, N.V.Zamfir

Lifetimes in Neutron-Rich Fission Fragments using the Differential Recoil Distance Method

RADIOACTIVITY 252Cf(SF); measured Doppler-shifted Eγ, Iγ, γγ-, (fragment)γ-coin. 104Mo, 110Ru, 144Ba deduced levels T1/2, transition quadrupole moments. Differential recoil distance method.

doi: 10.1103/PhysRevC.64.017305
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2001NE11      Phys.Rev. C64, 027304 (2001)

H.Newman, J.R.Novak, C.W.Beausang, C.J.Barton, M.A.Caprio, R.F.Casten, J.R.Cooper, A.A.Hecht, R.Krucken, N.Pietralla, A.Wolf, N.V.Zamfir, J.-Y.Zhang, K.E.Zyromski, I.Birriel, J.Saladin

High-Spin States in 203Rn

NUCLEAR REACTIONS 174Yb(34S, 5n), E=167 MeV; 168Er(40Ar, 5n), E=188 MeV; measured Eγ, Iγ, γγ-, (recoil)γ-coin. 203Rn deduced high-spin levels, J, π, configurations. Gammasphere, Yrast ball arrays, fragment mass analyzer.

doi: 10.1103/PhysRevC.64.027304
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2001NI13      Phys.Rev. C64, 034313 (2001)

N.Nica, G.Duchene, V.E.Iacob, J.Dudek, F.A.Beck, Th.Byrski, D.Curien, G.de France, B.Haas, B.Kharraja, D.Prevost, C.Petrache, H.Savajols, J.P.Vivien, L.Han, K.Zuber, M.Aiche, M.M.Aleonard, J.F.Chemin, C.W.Beausang, S.Clarke, P.J.Dagnall, M.Smith, P.J.Twin, J.Simpson, M.A.Bentley

High-Spin States in 155Er

NUCLEAR REACTIONS 123Sb(37Cl, 5n), E=193 MeV; measured Eγ, Iγ, γγ-coin, γ-ray polarization. 155Er deduced high-spin levels, J, π, δ, configurations, deformation. Eurogam II array. Tilted-Fermi-surface analysis.

doi: 10.1103/PhysRevC.64.034313
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2001PI12      Phys.Rev. C64, 031301 (2001)

N.Pietralla, C.J.Barton III, R.Krucken, C.W.Beausang, M.A.Caprio, R.F.Casten, J.R.Cooper, A.A.Hecht, H.Newman, J.R.Novak, N.V.Zamfir

Coulomb Excitation of the 2ms+ State of 96Ru in Inverse Kinematics

NUCLEAR REACTIONS C(96Ru, 96Ru'), E=280 MeV; measured Eγ, Iγ, γγ-coin following projectile Coulomb excitation. 96Ru deduced transitions B(M1), B(E2), mixed-symmetry 2+ state. Comparison with neighboring nuclide 94Mo, IBM-2, shell model, and quasiparticle phonon model calculations.

doi: 10.1103/PhysRevC.64.031301
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2001ST04      Phys.Rev.Lett. 86, 971 (2001)

K.Starosta, T.Koike, C.J.Chiara, D.B.Fossan, D.R.LaFosse, A.A.Hecht, C.W.Beausang, M.A.Caprio, J.R.Cooper, R.Krucken, J.R.Novak, N.V.Zamfir, K.E.Zyromski, D.J.Hartley, D.L.Balabanski, J.-Y.Zhang, S.Frauendorf, V.I.Dimitrov

Chiral Doublet Structure in Odd-Odd N = 75 Isotones: Chiral vibrations

NUCLEAR REACTIONS 124Sn(10B, 4n), E=47 MeV; 123Sb(13C, 4n), E=64 MeV; 116Sn(24Mg, 4n), E=130 MeV; measured Eγ, Iγ, γγ-coin. 130Cs, 132La, 136Pm deduced high-spin levels, J, π, possible chiral vibrations. Tilted axis cranking calculations.

doi: 10.1103/PhysRevLett.86.971
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2001TO06      Phys.Rev. C63, 034314 (2001)

B.E.Tomlin, C.J.Barton, N.V.Zamfir, M.A.Caprio, R.L.Gill, R.Krucken, J.R.Novak, J.R.Cooper, K.E.Zyromski, G.Cata-Danil, C.W.Beausang, A.Wolf, N.A.Pietralla, H.Newman, J.Cederkall, B.Liu, Z.Wang, R.F.Casten, D.S.Brenner

Mass Measurements of 70Se, 71Se, 72Br, and 73Br

RADIOACTIVITY 70,71Se, 72,73Br(β+) [from 58Ni(HI, xnyp)]; measured β-spectrum, βγ-coin; deduced Q(EC), mass excess. Comparison with model predictions.

doi: 10.1103/PhysRevC.63.034314
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2001WU03      Phys.Rev. C64, 014307 (2001); Comment Phys.Rev. C66, 039801 (2002)

C.Y.Wu, D.Cline, A.B.Hayes, M.W.Simon, R.Krucken, J.R.Cooper, C.J.Barton, C.W.Beausang, C.Bialik, M.A.Caprio, R.F.Casten, A.A.Hecht, H.Newman, J.Novak, N.Pietralla, K.Zyromski, N.V.Zamfir

Two-Phonon γ-Vibrational Strength in Osmium Nuclei

NUCLEAR REACTIONS 188,190Os(58Ni, 58Ni'), E=275 MeV; measured Doppler-shifted Eγ, Iγ, γγ-, (particle)γ-coin following Coulomb excitation. 188,190Os deduced levels, J, π, B(E2), two-phonon γ-vibration strength. Recoil-distance technique.

doi: 10.1103/PhysRevC.64.014307
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2000AP01      Phys.Rev. C61, 037303 (2000)

D.E.Appelbe, C.W.Beausang, C.J.Barton, M.A.Caprio, R.F.Casten, J.Cederkall, J.R.Cooper, R.Krucken, J.R.Novak, N.V.Zamfir, Z.Wang

Evidence for Superdeformation in 149, 150Dy: Onset of the collapse of the Z = 66 deformed shell closure ?

NUCLEAR REACTIONS 120Sn(34S, 4n), (34S, 5n), E=175 MeV; measured Eγ, Iγ, γγ-coin. 149,150Dy deduced possible continuum superdeformed transitions.

doi: 10.1103/PhysRevC.61.037303
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2000GR32      Phys.Rev. C62, 064304 (2000)

J.Groger, J.Jolie, R.Krucken, C.W.Beausang, M.Caprio, R.F.Casten, J.Cederkall, J.R.Cooper, F.Corminboeuf, L.Genilloud, G.Graw, C.Gunther, M.de Huu, A.I.Levon, A.Metz, J.R.Novak, N.Warr, T.Wendel

Nuclear Structure of 196Au: More evidence for its supersymmetric description

NUCLEAR REACTIONS 196Pt(p, n), (p, 2n), E=9.1-11.7 MeV; measured Eγ, Iγ, γ-ray excitation functions. 196Pt(p, n), E=9.1 MeV; measured Eγ, Iγ, E(Ce), I(ce), (X-ray)γ-, (ce)γ-, γγ-coin. 196Au deduced levels, J, π. Comparison with extended supersymmetry model predictions.

doi: 10.1103/PhysRevC.62.064304
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2000GU22      Phys.Rev. C61, 064602 (2000)

C.Gunther, R.Krucken, C.J.Barton, C.W.Beausang, R.F.Casten, Gh.Cata-Danil, J.R.Cooper, J.Groger, J.Novak, N.V.Zamfir

Coulomb Excitation of Vibrational States in 232Th with 16O Projectiles

NUCLEAR REACTIONS 232Th(16O, 16O'), E=80 MeV; measured Eγ, Iγ, γγ-coin following Coulomb excitation. 232Th deduced high-spin levels, J, π, transition intensities, vibrational bands features.

doi: 10.1103/PhysRevC.61.064602
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2000JA11      Phys.Lett. 494B, 187 (2000)

G.Jakob, N.Benczer-Koller, J.Holden, G.Kumbartzki, T.J.Mertzimekis, K.-H.Speidel, R.Ernst, P.Maier-Komor, C.W.Beausang, R.Krucken

First Measurements of the g Factors of the 21+ and 31+ States of Semi-Magic 4090Zr

NUCLEAR REACTIONS 24,26Mg(90Zr, 90Zr'), E=270, 300 MeV; measured Eγ, Iγ(θ, H, t), (recoil)γ-coin, DSA following projectile Coulomb excitation. 90Zr levels deduced g factors, T1/2, configurations. Transient field technique, target backed with Gd, Ta, Cu.

doi: 10.1016/S0370-2693(00)01197-7
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2000SM03      Phys.Rev. C61, 034314 (2000)

M.B.Smith, D.E.Appelbe, P.J.Twin, C.W.Beausang, F.A.Beck, M.A.Bentley, D.M.Cullen, D.Curien, P.J.Dagnall, G.de France, G.Duchene, S.Erturk, Ch.Finck, B.Haas, I.M.Hibbert, J.C.Lisle, B.M.Nyako, C.D.O'Leary, C.Rigollet, H.Savajols, J.Simpson, O.Stezowski, J.Styczen, J.P.Vivien, K.Zuber

Deformed Rotational Cascades in 152Dy: Further evidence for shape coexistence at high spin

NUCLEAR REACTIONS 124Sn(34S, 6n), E=182 MeV; measured Eγ, Iγ, γγ-coin. 120Sn(36S, 4n), E=168 MeV; measured Eγ, Iγ, γγ-coin, DSA. 152Dy deduced high-spin levels, J, π, T1/2, quadrupole moments, configurations, shape coexistence. Eurogam array. Cranked mean-field calculations.

doi: 10.1103/PhysRevC.61.034314
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2000WI18      Eur.Phys.J. A 9, 183 (2000)

A.N.Wilson, C.W.Beausang, N.Amzal, D.E.Appelbe, S.Asztalos, P.A.Butler, R.M.Clark, P.Fallon, A.O.Macchiavelli

High-Spin States following Multi-Nucleon Transfer

NUCLEAR REACTIONS 208Pb(64Ni, X), E=350 MeV; measured Eγ, Iγ, γγ-coin; deduced fragments isotopic yields following multi-nucleon transfer. 60,62Fe, 68,70,72Zn deduced high-spin levels, J, π. Gammasphere array.

doi: 10.1007/s100500070035
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1999FI12      Phys.Lett. 467B, 15 (1999)

Ch.Finck, O.Stezowski, N.Kintz, J.P.Vivien, K.Zuber, A.Nourreddine, D.E.Appelbe, C.W.Beausang, F.A.Beck, T.Byrski, S.Courtin, D.Curien, G.de France, G.Duchene, S.Erturk, B.J.P.Gall, B.Haas, N.Khadiri, E.Pachoud, C.Rigollet, M.Smith, Ch.Theisen, P.J.Twin

First Evidence for Linking Transitions between the Superdeformed Yrast Band and the Normal Deformed States in 149Gd

NUCLEAR REACTIONS 124Sn(30Si, 5n), E=158 MeV; measured Eγ, Iγ, γγ-coin. 149Gd deduced high-spin levels, J, π, superdeformed band linking transitions. Eurogam II array.

doi: 10.1016/S0370-2693(99)01139-9
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1999JA13      Phys.Lett. 468B, 13 (1999)

G.Jakob, N.Benczer-Koller, J.Holden, G.Kumbartzki, T.J.Mertzimekis, K.-H.Speidel, C.W.Beausang, R.Krucken

Spin Dependence of d5/2 Neutron Configurations in the Wave Functions of 92, 94Zr from g-Factor Measurements

NUCLEAR REACTIONS Si(92Zr, 92Zr'), (94Zr, 94Zr'), E=300 MeV; measured Eγ, Iγ(θ, H, t) following projectile Coulomb excitation. 92,94Zr levels deduced g factors, configurations.

doi: 10.1016/S0370-2693(99)01203-4
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