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Search: Author = R.F.Casten

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2023BU08      Phys.Rev. C 108, 014310 (2023)

D.Bucurescu, S.Pascu, G.Graw, R.Hertenberger, H.-F.Wirth, T.Faestermann, R.Krucken, M.Mahgoub, J.Jolie, P.von Brentano, S.Heinze, O.Moller, R.F.Casten, D.A.Meyer Brittingham

Updated analysis of the 170Er (p, t) 168Er reaction data

NUCLEAR REACTIONS 170Er(p, t)168Er, E=25 MeV; measured angular distributions; deduced exclusive σ(θ) to particular levels of 168Er, integrated σ. 168Er; deduced levels, J, π. Comparison of obtained σ(θ) compared with coupled channels calculations (CHUCK3). Comparison of obtained 168Er levels with prediction of the interacting boson model 1 with s, p, d, and f bosons (spdf-IBM-1). Q3D spectrograph.

doi: 10.1103/PhysRevC.108.014310
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2023WA10      Phys.Rev.Lett. 130, 192501 (2023)

M.Wang, Y.H.Zhang, X.Zhou, X.H.Zhou, H.S.Xu, M.L.Liu, J.G.Li, Y.F.Niu, W.J.Huang, Q.Yuan, S.Zhang, F.R.Xu, Y.A.Litvinov, K.Blaum, Z.Meisel, R.F.Casten, R.B.Cakirli, R.J.Chen, H.Y.Deng, C.Y.Fu, W.W.Ge, H.F.Li, T.Liao, S.A.Litvinov, P.Shuai, J.Y.Shi, Y.N.Song, M.Z.Sun, Q.Wang, Y.M.Xing, X.Xu, X.L.Yan, J.C.Yang, Y.J.Yuan, Q.Zeng, M.Zhang

Mass Measurement of Upper fp-Shell N = Z - 2 and N = Z - 1 Nuclei and the Importance of Three-Nucleon Force along the N = Z Line

ATOMIC MASSES 58Zn, 60Ga, 62Ge, 64As, 66Se, 70Kr, 61Ga, 63Ge, 65As, 67Se, 71Kr, 75Sr; measured time-of-flight (TOF); deduced mass excess (ME). A novel method of isochronous mass spectrometry, the Heavy Ion Research Facility in Lanzhou (HIRFL).

doi: 10.1103/PhysRevLett.130.192501
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2022IV01      Phys.Rev. C 105, 034337 (2022)

D.Ivanova, S.Lalkovski, C.Costache, S.Kisyov, C.Mihai, N.Marginean, P.Petkov, L.Atanasova, D.Bucurescu, R.B.Cakirli, M.P.Carpenter, R.F.Casten, Gh.Cata-Danil, I.Cata-Danil, D.Deleanu, D.Filipescu, N.Florea, I.Gheorghe, D.Ghita, T.Glodariu, F.G.Kondev, R.Lica, R.Marginean, A.Negret, S.Pascu, T.Sava, E.A.Stefanova, L.Stroe, G.Suliman, R.Suvaila, O.Yordanov, N.V.Zamfir

Structure of the low-lying states in 99, 101, 103, 105Pd

NUCLEAR REACTIONS 90,92,94Zr(12C, 3n), E=45 MeV; 96Zr(13C, 4n), E=55 MeV; measured Eγ, Iγ, γγ-coin. 94Zr(12C, 3n), E=56 MeV; measured Eγ, Iγ, γγ-coin with plunger device. 99,101,103,105Pd; deduced levels, J, π, B(M1), B(E2), T1/2 of excited states, multipolarity, δ, high-spin states, bands structure. Half-lives were determined by centroid shift method, deconvolution method and differential decay curve method (on case of 103Pd experiment with plunger). Comparison with rigid triaxial rotor plus particle model (RTRPM) calculations. RoSphere array comprised of 8 HPGe and 11 LaBr3:Ce detectors at IFIN-HH (Romania).

doi: 10.1103/PhysRevC.105.034337
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2021CO15      Phys.Rev. C 104, 054608 (2021)

A.Couture, R.F.Casten, R.B.Cakirli

Significantly improved estimates of neutron capture cross sections relevant to the r process

NUCLEAR REACTIONS 149,151,152,153,154,155Nd, 151,153,154,155,156,157,158Pm, 151,153,155,156,157,158,159Sm, 157,158,159,160,161,162Eu, 159,161Gd, 161Tb, 158,165,166,167Dy, 167,168,169,170Ho, 169,171Er, 171,172,173,174Tm, 175,177Yb, 177,178,179,180,181,182Lu, 172,175,181,183,184,185Hf, 179,181,182,183,184,185,186Ta, 176,178,181,187,188,189W(n, γ), E=30 keV; 116,118,119,121,123,125,127,129,131,132Te, 123,125,126,127,128,129,130,131,132,133I, 122,125,127,129,131,133Xe, 127,129,131,132,133,134,135Cs, 126,128,129,131,133,135Ba, 143,145Ce, 143,144,145,146Pr, 145,146,147Nd, 188,190,191,192,193,194,195,197,199,201,203Hg(n, γ), E=30 keV; 180,182,185,187,189,191,193,194,195Os, 189,191,193,194,195,196,197,198Ir, 186,188,191,192,193,194,195,197,199,200,201Pt(n, γ), E=30 keV; 224,225,226,227Rn, 222,223,224,225,226,227,228,229,230,231,232,233Ra, 229,231,233,234Ac, 224,226,228,230,231,233,234,235Th, 235Pa, 232,235,237,239U, 239Np, 236,238,241,243,245Pu, 242,245,247,248,249Cm, 249Bk, 246,248,250,251,252,253Cf, 253Es, 252,254,255Fm(n, γ), E=30 keV; predicted Maxwellian-averaged cross section (σMACS) from fitting of correlation between S(2n) and neutron capture cross sections at kT=5-100 keV neutron energies, with S(2n) taken from AME2016. Relevance to r process nucleosynthesis and elemental abundances.

COMPILATION 120,122,124,126,128,130Te, 124,126,128,130,132,134Xe, 130,132,134,136Ba, 148,150Nd, 150,152,154Sm, 152,154,156,158,160Gd, 156,160,162,164Dy, 162,164,166,168,170Er, 168,170,172,174,176Yb, 174,176,178,180,182Hf, 180,182,184,186W(n, γ), E=5-100 keV; 155,157Gd, 161,163Dy, 167Er, 171,173Yb, 177,179Hf, 183,185W(n, γ), E=5-100 keV; 151,153,155Eu, 159Tb, 163,165Ho, 169Tm, 175Lu, 181Ta(n, γ), E=5-100 keV; 184,186,188,190,192Os, 190,196,198Pt, 142Ce, 144Nd, 196,198,200,202,204Hg(n, γ), E=5-100 keV; 232Th, 234,236,238U, 240,242Pu, 244,246Cm, 127,129I, 133,135Cs, 154Eu, 176Lu(n, γ), E=30 keV; compiled S(2n) from AME2016, and Maxwellian-averaged cross section (σMACS) from KADoNiS database, NNDC webpage (www.nndc.bnl.gov/astro/), and 2011Ch57: Nucl. Data Sheets 112, 2887.

doi: 10.1103/PhysRevC.104.054608
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2020CA27      Phys.Rev. C 102, 054310 (2020)

R.F.Casten, R.B.Cakirli, D.Bonatsos, K.Blaum

Simple new signature of structure in deformed nuclei: Distinguishing the nature of axial asymmetry

NUCLEAR STRUCTURE 154,156,158,160,162Gd, 158,160,162,164,166Dy, 162,164,168,170,172Er, 164,166,168,170,172,174,176Yb, 168,170,172,174,176,178,180Hf, 170,172,174,176,178,180,182,184,186,188W, 182,184,186,188,190,192Os, 186,188,190,192,194,196Pt; analyzed ratios of two γ-band to ground-band experimental transition energies as a function of spin, and ratios of the inertial parameters between the γ bands and the ground bands; deduced a new and robust signature of structure of well-deformed and transitional even-even nuclei.

doi: 10.1103/PhysRevC.102.054310
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2020SI05      Phys.Rev. C 101, 024302 (2020)

N.Simbirtseva, M.Krticka, R.F.Casten, A.Couture, W.I.Furman, I.Knapova, J.M.O'Donnell, G.Rusev, J.L.Ullmann, S.Valenta

Examination of photon strength functions and nuclear level density in 196Pt from the γ-ray spectra measured at the DANCE facility

NUCLEAR REACTIONS 195Pt(n, γ), E=9-1000 eV; measured E(n) by time of flight, Eγ, Iγ, γγ-coin, multi-step γ-ray cascades (MSCs) using the segmented γ-ray Detector for Advanced Neutron Capture (DANCE) of 160 BaF2 crystals at the Los Alamos Neutron Science Center (LANSC). 196Pt; deduced nuclear level density (NLD) and photon strength functions (PSFs); confirmed E1 PSF resonance at ≈5.6 MeV. Comparison of experimental MSC spectra with previous experimental data from Oslo and others, and with constant-temperature (CT) and back-shifted Fermi-gas (BSFG) model calculations.

doi: 10.1103/PhysRevC.101.024302
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2018SH36      Nucl.Phys. A980, 131 (2018)

Y.Y.Sharon, N.Benczer-Koller, G.J.Kumbartzki, L.Zamick, R.F.Casten

Systematics of the ratio of electric quadrupole moments Q(2+1) to the square root of the reduced transition probabilities B(E2; 0+1 → 2+1) in even-even nuclei

doi: 10.1016/j.nuclphysa.2018.10.027
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2017BO11      Phys.Rev. C 95, 064325 (2017)

D.Bonatsos, I.E.Assimakis, N.Minkov, A.Martinou, R.B.Cakirli, R.F.Casten, K.Blaum

Proxy-SU(3) symmetry in heavy deformed nuclei

doi: 10.1103/PhysRevC.95.064325
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2017BO12      Phys.Rev. C 95, 064326 (2017)

D.Bonatsos, I.E.Assimakis, N.Minkov, A.Martinou, S.Sarantopoulou, R.B.Cakirli, R.F.Casten, K.Blaum

Analytic predictions for nuclear shapes, prolate dominance, and the prolate-oblate shape transition in the proxy-SU(3) model

NUCLEAR STRUCTURE 112,114,116,118,120,122,124,126,128,130,144,146,148,150,152,154,156,158,160,162,164,166,168,170,172,174,176Ba, 114,116,118,120,122,124,126,128,130,132,134,146,148,150,152,154,156,158,160,162,164,166,168,170,172,174,176,178Ce, 116,118,120,122,124,126,128,130,132,134,136,148,150,152,154,156,158,160,162,164,166,168,170,172,174,176,178,180Nd, 118,120,122,124,126,128,130,132,134,136,138,152,154,156,158,160,162,164,166,168,170,172,174,176,178,180,182Sm, 120,122,124,126,128,130,132,134,136,138,140,154,156,158,160,162,164,166,168,170,172,174,176,178,180,182,184Gd, 122,124,126,128,130,132,134,136,138,140,142,156,158,160,162,164,166,168,170,172,174,176,178,180,182,184,186Dy, 124,126,128,130,132,134,136,138,140,142,146,158,160,162,164,166,168,170,172,174,176,178,180,182,184,186,188Er, 126,128,130,132,134,136,138,140,142,146,148,160,162,164,166,168,170,172,174,176,178,180,182,184,186,188,190Yb, 128,130,132,134,136,138,140,142,146,148,150,162,164,166,168,170,172,174,176,178,180,182,184,186,188,190,192Hf, 130,132,134,136,138,140,142,146,148,150,152,166,168,170,172,174,176,178,180,182,184,186,188,190,192,194W, 132,134,136,138,140,142,146,148,150,152,154,168,170,172,174,176,178,180,182,184,186,188,190,192,194,196Os, 134,136,138,140,142,146,148,150,152,154,156,178,180,182,184,186,188,190,192,194,196,198Pt; calculated β and γ deformations using a new approximate analytic parameter-free proxy-SU(3) model. Comparison with empirical results.

doi: 10.1103/PhysRevC.95.064326
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2017CO16      Phys.Rev. C 96, 061601 (2017)

A.Couture, R.F.Casten, R.B.Cakirli

Simple, empirical approach to predict neutron capture cross sections from nuclear masses

NUCLEAR REACTIONS 156,158,160,162Nd, 158,160,162,164,166,168Sm, 168Gd, 154,156Dy, 174,176,178W(n, γ), kT=30 keV; deduced Maxwellian capture cross sections from empirical fits of experimental neutron capture cross sections to S(2n) values. Similar analysis carried out for other nuclei such as N>82 Ce, Nd, Hg, Os, Pt, Z=52-56 and odd-N, Z=60-74 nuclei. Comparison with predictions from TALYS and NONSMOKER models. Proposed a simple empirical approach to correlate neutron capture cross sections and nuclear masses. Relevance to astrophysical s- and r-processes, modeling of nuclear reactor designs, and nuclear forensics applications.

doi: 10.1103/PhysRevC.96.061601
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2016CA09      Phys.Scr. 91, 033004 (2016)

R.F.Casten, R.B.Cakirli

The evolution of collectivity in nuclei and the proton-neutron interaction

NUCLEAR STRUCTURE N<150; analyzed available data on energies and B(E2) values; deduced systematics.

doi: 10.1088/0031-8949/91/3/033004
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2016CA41      Phys.Rev. C 94, 061303 (2016)

R.F.Casten, J.Jolie, R.B.Cakirli, A.Couture

Finite valence nucleon number and rotation-vibration interactions

NUCLEAR STRUCTURE 168Er; calculated relative interband B(E2) values with bandmixing formalism and Partial Dynamical Symmetry SU(3) model for deformed nuclei; derived relation between the two approaches. Linkage of rotation-vibration coupling to valence nucleon number. General formalism in the paper with an example of 168Er.

doi: 10.1103/PhysRevC.94.061303
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2016LA07      Phys.Rev. C 93, 034321 (2016)

M.Laskin, R.F.Casten, A.O.Macchiavelli, R.M.Clark, D.Bucurescu

Population of the giant pairing vibration

NUCLEAR REACTIONS 132Sn(p, t), E=20 MeV; calculated σ(E) using mixing of unbound levels in a set of toy models to incorporate giant pairing vibrations (GPV), and distorted-wave Born approximation (DWBA) transfer amplitudes; deduced small role of mixing of unbound levels in lowering such cross sections.

doi: 10.1103/PhysRevC.93.034321
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2016WE01      Phys.Rev. C 93, 034323 (2016)

V.Werner, N.Cooper, J.-M.Regis, M.Rudigier, E.Williams, J.Jolie, R.B.Cakirli, R.F.Casten, T.Ahn, V.Anagnostatou, Z.Berant, M.Bonett-Matiz, M.Elvers, A.Heinz, G.Ilie, D.Radeck, D.Savran, M.K.Smith

Evolution of collectivity near mid-shell from excited-state lifetime measurements in rare earth nuclei

RADIOACTIVITY 168Ta(EC)[from 159Tb(16O, 7n), E=130 MeV]; 174Re(EC)[from 169Tm(12C, 7n), E=115 MeV]; 152Eu(EC); measured Eγ, γγ-coin, γγ(t) using fast timing system at WNSL-Yale University. 168Hf, 174W; deduced levels, half-lives and B(E2) of first 2+ states. Comparison with previous experimental results. Systematics and analysis in terms of differentials of B(E2) values of the first 2+ states for 162,164,166,168,170,172,174,176,178Hf, 164,166,168,170,172,174,176,178,180W.

doi: 10.1103/PhysRevC.93.034323
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2015CO01      Phys.Rev. C 91, 014312 (2015)

A.Couture, R.F.Casten, R.B.Cakirli

Extended tests of an SU(3) partial dynamical symmetry

NUCLEAR STRUCTURE 104,106,108Mo, 168Er, 228Ra, 228,230,232Th, 232,234,236,238U, 238,240Pu; calculated B(E2) for transitions between γ band and ground-state band members. Parameter-free description in terms of a partial SU(3) dynamical symmetry (PDS). Comparison with predictions of pure rotor (Alaga) model, and with experimental results.

doi: 10.1103/PhysRevC.91.014312
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2015KA18      Phys.Rev. C 91, 054325 (2015)

S.Karampagia, D.Bonatsos, R.F.Casten

Regularity and chaos in 0+ states of the interacting boson model using quantum measures

doi: 10.1103/PhysRevC.91.054325
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2014CA29      Phys.Rev.Lett. 113, 112501 (2014)

R.F.Casten, R.B.Cakirli, K.Blaum, A.Couture

Evidence for Partial Dynamical Symmetries in Atomic Nuclei

NUCLEAR STRUCTURE 166,168Er, 158Gd, 168Yb, 162Dy, 184W, 184,186Os; analyzed available data; deduced relative B(E2) values, transition properties. Comparison with experimental data.

doi: 10.1103/PhysRevLett.113.112501
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2013BE04      Phys.Rev. C 87, 024318 (2013)

C.Bernards, R.F.Casten, V.Werner, P.von Brentano, D.Bucurescu, G.Graw, S.Heinze, R.Hertenberger, J.Jolie, S.Lalkovski, D.A.Meyer, D.Mucher, P.Pejovic, C.Scholl, H.-F.Wirth

Investigation of 0+ states in 198Hg after two-neutron pickup

NUCLEAR REACTIONS 200Hg(p, t), E=25 MeV; measured E(t), I(t), σ(θ). 198Hg; deduced levels, J, π, L-transfer.

NUCLEAR STRUCTURE 152,154,158Gd, 162Dy, 168Er, 170Yb, 176Hf, 180,184W, 192,194Pt, 198Hg; calculated densities of 0+ states using interacting boson model. Excited 0+ states interpreted as signature of shape-phase transitions. Comparison with experimental data.

doi: 10.1103/PhysRevC.87.024318
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2013BE21      Phys.Rev. C 87, 064321 (2013)

C.Bernards, R.F.Casten, V.Werner, P.von Brentano, D.Bucurescu, G.Graw, S.Heinze, R.Hertenberger, J.Jolie, S.Lalkovski, D.A.Meyer, D.Mucher, P.Pejovic, C.Scholl, H.-F.Wirth

High-resolution study of excited 0+ states in 200Hg and 202Hg

NUCLEAR REACTIONS 202,204Hg(p, t), E=25 MeV; measured triton spectra, σ(θ) using Q3D magnetic spectrograph at MLL, Munich accelerator facility. Enriched targets. 200,202Hg; deduced levels, L=0 states, J, π. 198,200,202Hg; systematics of 0+ level density, and Comparison with interacting boson model. 200Hg anomaly. Discussed mixing, coexistence and shape-phase transitions.

doi: 10.1103/PhysRevC.87.064321
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2013BO27      Phys.Rev. C 88, 054309 (2013)

D.Bonatsos, S.Karampagia, R.B.Cakirli, R.F.Casten, K.Blaum, L.Amon Susam

Emergent collectivity in nuclei and enhanced proton-neutron interactions

NUCLEAR STRUCTURE Z=50-82, N=82-126; analyzed empirical values of proton-neutron interaction Vpn for even and odd Z nuclei, E(4+)/E(2+) values for even A nuclei; calculated average spatial overlaps (for deformation ϵ=0.22) for proton and neutron orbitals, Nilsson diagrams; deduced enhancement of the large empirical values of p-n interactions along the Z=N line indicative of collectivity, shape changes, and the saturation of deformation. Pseudoshell approach to heavy nuclei.

doi: 10.1103/PhysRevC.88.054309
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2013JO05      Phys.Rev. C 88, 034306 (2013)

R.V.Jolos, P.von Brentano, R.F.Casten

Anharmonicity of the excited octupole band in actinides using supersymmetric quantum mechanics

NUCLEAR STRUCTURE 232Th, 238U, 240Pu; calculated levels, J, π of ground-state, octupole and alternating parity bands. E1 and E2 transition matrix elements. Supersymmetric quantum mechanical techniques. Comparison with experimental data.

doi: 10.1103/PhysRevC.88.034306
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2013MC07      Phys.Rev. C 87, 057306 (2013)

E.A.McCutchan, R.F.Casten, V.Werner, R.J.Casperson, A.Heinz, J.Qian, B.Shoraka, J.R.Terry, E.Williams, R.Winkler

β decay spectroscopy of light Nd isotopes

RADIOACTIVITY 132,134Pm(β+), (EC)[from 92Mo(46Ti, 3n3p), (46Ti, n3p), E=230 MeV]; measured Eγ, Iγ, γγ-coin, γγ(θ) at Yale facility. 132,134Nd; deduced levels, J, π, branching ratio, multipolarity, mixing ratio. Comparison with predictions of X(5) model. Systematics of low-lying levels in 130Ce, 132Nd, and 150Nd.

doi: 10.1103/PhysRevC.87.057306
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2013SH30      Phys.Rev. C 88, 024310 (2013)

D.Shubina, R.B.Cakirli, Yu.A.Litvinov, K.Blaum, C.Brandau, F.Bosch, J.J.Carroll, R.F.Casten, D.M.Cullen, I.J.Cullen, A.Y.Deo, B.Detwiler, C.Dimopoulou, F.Farinon, H.Geissel, E.Haettner, M.Heil, R.S.Kempley, C.Kozhuharov, R.Knobel, J.Kurcewicz, N.Kuzminchuk, S.A.Litvinov, Z.Liu, R.Mao, C.Nociforo, F.Nolden, Z.Patyk, W.R.Plass, A.Prochazka, M.W.Reed, M.S.Sanjari, C.Scheidenberger, M.Steck, Th.Stohlker, B.Sun, T.P.D.Swan, G.Trees, P.M.Walker, H.Weick, N.Winckler, M.Winkler, P.J.Woods, T.Yamaguchi, C.Zhou

Schottky mass measurements of heavy neutron-rich nuclides in the element range 70≤Z≤79 at the GSI Experimental Storage Ring

ATOMIC MASSES 181,183Lu, 185,186Hf, 187,188Ta, 189,190,191W, 192,193Re, 195Os; measured masses by Schottky mass spectrometry (SMS) technique using FRS-ESR facility at GSI. 181Hf, 181,182,183,185Ta, 184,186,187W, 189,191Re, 188,190,192,193Os, 191Ir, 194,196Pt, 196Au; measured Schottky frequency spectra for calibration purpose; deduced mass excesses, and compared with AME-2003. 179Lu, 182,182mHf, 184Ta, 186,187,188,190m,192mRe, 189,190m,191,194Os, 190,192,193,194,195Ir, 191Pt; measured Schottky frequency spectra. Bare, H- or He-like isotopes produced in 9Be(197Au, X) reaction using E(197Au)=469.35 MeV/nucleon beam from UNILAC and SIS-18 accelerators at GSI. Investigated correlations between S(2n) and energies of first 2+ states in even-even N=84-124, Z=62-78 isotopes; deduced collectivity. Systematics of S(2n) values for even N=100-124, odd Z=67-77.

doi: 10.1103/PhysRevC.88.024310
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2013UR01      Phys.Rev. C 87, 031304 (2013)

W.Urban, M.Jentschel, R.F.Casten, J.Jolie, Ch.Bernards, B.Maerkisch, Th.Materna, P.Mutti, L.Prochniak, T.Rzaca-Urban, G.S.Simpson, V.Werner, S.Ahmed

02+ band in 102Ru and the evolution of nuclear deformation in Ru isotopes

NUCLEAR REACTIONS 101Ru(n, γ), E=cold neutrons; measured Eγ, Iγ, γγ-coin, γγ(θ) using PF1B cold-neutron facility and GAMS5 spectrometer at Grenoble. 102Ru; deduced levels, J, π, bands, multipolarity, mixing ratio, interaction pattern between 0+ states. Systematics of 0+2 bands and other low-lying levels in Ru isotopes from N=50-66.

doi: 10.1103/PhysRevC.87.031304
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2012AL05      Phys.Rev. C 85, 034301 (2012); Pub.Note Phys.Rev. C 85, 039904 (2012)

N.Al-Dahan, P.H.Regan, Zs.Podolyak, P.M.Walker, N.Alkhomashi, G.D.Dracoulis, G.Farrelly, J.Benlliure, S.B.Pietri, R.F.Casten, P.D.Stevenson, W.Gelletly, S.J.Steer, A.B.Garnsworthy, E.Casarejos, J.Gerl, H.J.Wollersheim, J.Grebosz, M.Gorska, I.Kojouharov, H.Schaffner, A.Algora, G.Benzoni, A.Blazhev, P.Boutachkov, A.M.Bruce, I.J.Cullen, A.M.D.Bacelar, A.Y.Deo, M.E.Estevez, Y.Fujita, R.Hoischen, R.Kumar, S.Lalkovski, Z.Liu, P.J.Mason, C.Mihai, F.Molina, D.Mucher, B.Rubio, A.Tamii, S.Tashenov, J.J.Valiente-Dobon, P.J.Woods

Multiple Β- decaying states in 194Re: Shape evolution in neutron-rich osmium isotopes

NUCLEAR REACTIONS 9Be(208Pb, X)186Hf/187Hf/188Hf/189Hf/188Ta/189Ta/190Ta/191Ta/190W/191W/192W/193W/192Re/193Re/194Re/195Re/196Re/195Os/196Os/197Os/198Os, E=1 GeV/nucleon; measured fragment yields, ion identification by energy loss and time-of-flight methods; deduced decay properties. GSI FRagment Separator (FRS), RISING spectrometer.

RADIOACTIVITY 192,194Re[from 9Be(208Pb, X), E=1 GeV/nucleon](β-); 194Os[from 194Re decay](α); measured Eγ, Iγ, βγ-, (implants)γ-coin, recoil-decay tagging method, half-life. 194Os; deduced levels, J, π. 187Hf, 188,189,190Ta, 190,191W, 192,193Re(IT); measured Eγ, Iγ, half-lives. GSI FRagment Separator (FRS), RISING spectrometer. Systematics of low-lying 0+, 2+, 4+ and 6+ states in N=110-122 Os and W nuclei.

NUCLEAR STRUCTURE 194Re; calculated levels, J, π, configurations using Nilsson multi-quasiparticle (MQP) model.

doi: 10.1103/PhysRevC.85.034301
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2012BO23      J.Phys.:Conf.Ser. 366, 012025 (2012)

D.Bonatsos, S.Karampagia, R.F.Casten

Analytic derivation of the Alhassid-Whelan arc of regularity

doi: 10.1088/1742-6596/366/1/012025
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2012CA44      J.Phys.:Conf.Ser. 366, 012007 (2012)

R.F.Casten, R.B.Cakirli

Simple patterns and Symmetries in Nuclei: Correlations of Mass and Spectroscopic Observables

COMPILATION Z=56-70; compiled E(2+1) energy, R4/2 ratio, B(E2:2+1≥0+1) and S2n; deduced mass and spectroscopic observables correlations near N≈80.

doi: 10.1088/1742-6596/366/1/012007
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2012LU03      Phys.Rev. C 85, 017301 (2012)

R.Luttke, E.A.McCutchan, V.Werner, K.Aleksandrova, S.Atwater, H.Ai, R.J.Casperson, R.F.Casten, A.Heinz, A.F.Mertz, J.Qian, B.Shoraka, J.R.Terry, E.Williams, R.Winkler

Collectivity in 66Ge and 68Ge via lifetime measurements

NUCLEAR REACTIONS 58Ni(10B, pn), E=28 MeV; 58Ni(12C, 2p), E=38 MeV; measured Eγ, half-lives of first 2+ states by recoil-distance Doppler shift using a plunger device and SPEEDY array at WNSL, Yale. 66,68Ge; deduced level, B(E2). Comparison with large-scale shell-model calculations.

doi: 10.1103/PhysRevC.85.017301
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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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2012WO03      Phys.Rev. C 85, 037304 (2012);Erratum Phys.Rev. C 86, 019902 (2012)

A.Wolf, Z.Berant, V.Werner, A.Heinz, R.F.Casten, R.J.Casperson, D.S.Brenner, R.Chevrier, D.McCarthy, G.Ilie, E.Williams, J.Qian, J.R.Terry, T.Ahn, R.Winkler

g factor of the 21+ state of 168Hf

NUCLEAR MOMENTS 168Hf; measured g factor by perturbed angular correlation in a static external magnetic field. Comparisons with hydrodynamic model, semiempirical model, IBA-2 model, large-scale shell-model, pairing plus quadrupole model. Systematics of g factors of first 2+ states for 96,98,100,104,106,108Hf.

RADIOACTIVITY 168Ta(EC), (β+)[from 159Tb(16O, 7n), E=130 MeV]; measured Eγ, γγ-coin, perturbed γγ(θ) in a magnetic field; deduced g factor.

doi: 10.1103/PhysRevC.85.037304
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2011BO15      Phys.Rev. C 83, 054313 (2011)

D.Bonatsos, S.Karampagia, R.F.Casten

Analytic derivation of an approximate SU(3) symmetry inside the symmetry triangle of the interacting boson approximation model

doi: 10.1103/PhysRevC.83.054313
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2011BO24      Phys.Rev. C 84, 044326 (2011)

H.G.Borner, R.F.Casten, M.Jentschel, P.Mutti, W.Urban, N.V.Zamfir

102Ru: A pivotal nucleus in the A ∼ 100 region

NUCLEAR REACTIONS Ru(n, γ)102Ru, E=thermal; measured Eγ, Doppler shift using Gamma-ray Induced Doppler broadening (GRID) technique using GAMS4 spectrometer. 102Ru; deduced levels, J, π, half-life, B(E2). GRID lifetime technique. Comparison with predictions of vibrational model. N=52-66, Z=38-50; systematics of first 2+ energies and ratio R(4/2) of first 4+ and first 2+ energies.

doi: 10.1103/PhysRevC.84.044326
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2011IL02      Phys.Rev. C 84, 064320 (2011)

G.Ilie, R.F.Casten

E0 transitions in deformed nuclei

doi: 10.1103/PhysRevC.84.064320
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2011KE03      Phys.Rev. C 84, 014311 (2011)

J.Ketelaer, G.Audi, T.Beyer, K.Blaum, M.Block, R.B.Cakirli, R.F.Casten, C.Droese, M.Dworschak, K.Eberhardt, M.Eibach, F.Herfurth, E.Minaya-Ramirez, Sz.Nagy, D.Neidherr, W.Nortershauser, C.Smorra, M.Wang

Mass measurements on stable nuclides in the rare-earth region with the Penning-trap mass spectrometer TRIGA-TRAP

ATOMIC MASSES 153Eu, 152,154,155,156,157,158,160Gd, 175,176Lu, 176,177,178,179,180Hf; measured masses using TOF-ICR technique and TRIGA-TRAP Penning-trap mass spectrometer; deduced δVpn values; evaluated mass excesses.

doi: 10.1103/PhysRevC.84.014311
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2011TA06      Phys.Rev. C 83, 044315 (2011)

M.J.Taylor, G.Gurdal, G.Kumbartzki, N.Benczer-Koller, A.E.Stuchbery, Y.Y.Sharon, M.A.Bentley, Z.Berant, R.J.Casperson, R.F.Casten, A.Heinz, G.Ilie, R.Luttke, E.A.McCutchan, J.Qian, B.Shoraka, V.Werner, E.Williams, R.Winkler

Low-energy structure of the even-A 96-104Ru isotopes via g-factor measurements

NUCLEAR MOMENTS 96,98,100,102,104Ru, 106Pd; measured g factors of first 2+ states by transient-field-perturbed angular correlation technique used with Coulomb excitation in inverse kinematics. Comparison with IBM-2 calculations.

NUCLEAR REACTIONS 12C(96Ru, 96Ru'), (98Ru, 98Ru'), (100Ru, 100Ru'), (102Ru, 102Ru'), (104Ru, 104Ru'), (106Pd, 106Pd'), E=280 MeV; 12C(102Ru, 102Ru'), E=160, 227 MeV; 12C(106Pd, 106Pd'), E=230 MeV; 24Mg(102Ru, 102Ru'), E=227 MeV; 26Mg(96Ru, 96Ru'), (98Ru, 98Ru'), E=230 MeV; 26Mg(100Ru, 100Ru'), (102Ru, 102Ru'), (104Ru, 104Ru'), E=227 MeV; measured (particle)γ-coin spectra, (particle)γ(θ), precession angles; deduced transient field strengths, g factors. Coulomb excitation in inverse kinematics.

doi: 10.1103/PhysRevC.83.044315
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2010BO01      Phys.Rev.Lett. 104, 022502 (2010)

D.Bonatsos, E.A.McCutchan, R.F.Casten

SU(3) Quasidynamical Symmetry Underlying the Alhassid-Whelan Arc of Regularity

doi: 10.1103/PhysRevLett.104.022502
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2010BR02      Phys.Rev. C 81, 034313 (2010)

M.Breitenfeldt, Ch.Borgmann, G.Audi, S.Baruah, D.Beck, K.Blaum, Ch.Bohm, R.B.Cakirli, R.F.Casten, P.Delahaye, M.Dworschak, S.George, F.Herfurth, A.Herlert, A.Kellerbauer, M.Kowalska, D.Lunney, E.Minaya-Ramirez, S.Naimi, D.Neidherr, M.Rosenbusch, R.Savreux, S.Schwarz, L.Schweikhard, C.Yazidjian

Approaching the N=82 shell closure with mass measurements of Ag and Cd isotopes

ATOMIC MASSES 112,114,115,116,117,118,119,120,121,122,123,124Ag, 114,120,122,123,124,126,128Cd; measured cyclotron frequencies relative to 133Cs, and mass excesses using ISOLTRAP Penning trap spectrometer; deduced excitation energies of the isomers; evaluated mass excesses; two-neutron separate energies, and proton-neutron interaction strength δVpn. Comparison with previous data and AME-2003.

doi: 10.1103/PhysRevC.81.034313
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2010CA26      Phys.Rev. C 82, 061304 (2010)

R.B.Cakirli, K.Blaum, R.F.Casten

Indication of a mini-valence Wigner-like energy in heavy nuclei

NUCLEAR STRUCTURE Z=4-26, N=3-28; Z=62-74, N=90-110; analyzed double differences of binding energies for valence neutron and proton numbers in even-Z, even-N and even-Z, odd-N nuclei. Z=64-74, N=92-108; ground state Nilsson orbits for even-Z and even-N nuclei. Wigner?s spin-isospin symmetry and valence proton-neutron interaction.

doi: 10.1103/PhysRevC.82.061304
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2010CA27      Phys.Rev. C 82, 061306 (2010)

R.B.Cakirli, R.F.Casten, K.Blaum

Correlations of experimental isotope shifts with spectroscopic and mass observables

NUCLEAR STRUCTURE Z=12-20, N=10-32; Z=38-50, N=40-84; Z=52-56, N=62-92; Z=58-70, N=70-104; Z=72-82, N=84-132; analyzed mean-square charge radii, S(2n), B(E2) and energies of first 2+ states and their differentials in even-Z, even-N nuclei.

doi: 10.1103/PhysRevC.82.061306
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2010IL03      Phys.Rev. C 82, 024303 (2010)

G.Ilie, R.F.Casten, P.von Brentano, D.Bucurescu, T.Faestermann, G.Graw, S.Heinze, R.Hertenberger, J.Jolie, R.Krucken, D.A.Meyer, D.Mucher, C.Scholl, V.Werner, R.Winkler, H.-F.Wirth

Investigation of 0+ states in 192Pt and 194Pt isotopes

NUCLEAR REACTIONS 194,196Pt(p, t), E=25 MeV: measured triton spectra, σ(θ). 192,194Pt; deduced levels, L-transfers, J, π. DWBA analysis of σ(θ) data. Systematics of low-lying states of even-even Pt nuclei from A=170-202, and 0+ states in 152,154,158Gd, 162Dy, 168Er, 170Yb, 176Hf, 180,184W, 190Os, 192,194Pt.

doi: 10.1103/PhysRevC.82.024303
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2009AL30      Phys.Rev. C 80, 064308 (2009)

N.Alkhomashi, P.H.Regan, Zs.Podolyak, S.Pietri, A.B.Garnsworthy, S.J.Steer, J.Benlliure, E.Caserejos, R.F.Casten, J.Gerl, H.J.Wollersheim, J.Grebosz, G.Farrelly, M.Gorska, I.Kojouharov, H.Schaffner, A.Algora, G.Benzoni, A.Blazhev, P.Boutachkov, A.M.Bruce, A.M.D.Bacelar, I.J.Cullen, L.Caceres, P.Doornenbal, M.E.Estevez, Y.Fujita, W.Gelletly, R.Hoischen, R.Kumar, N.Kurz, S.Lalkovski, Z.Liu, C.Mihai, F.Molina, A.I.Morales, D.Mucher, W.Prokopowicz, B.Rubio, Y.Shi, A.Tamii, S.Tashenov, J.J.Valiente-Dobon, P.M.Walker, P.J.Woods, F.R.Xu

β+-delayed spectroscopy of neutron-rich tantalum nuclei: Shape evolution in neutron-rich tungsten isotopes

NUCLEAR REACTIONS Be(208Pb, X)186Hf/187Hf/188Hf/189Hf/188Ta/189Ta/190Ta/191Ta/192Ta/190W/191W/192W/193W/194W/192Re/193Re/194Re/195Re/196Re, E=1 GeV/nucleon; measured yields. 187Hf, 188,189,190Ta, 190,191W, 192,193Re; measured delayed γ; deduced isomers and half-lives.

RADIOACTIVITY 188,190,192Ta(β-)[from Be(208Pb, X), E=1 GeV/nucleon]; measured Eγ, Iγ, γγ-coin, βγ correlations, and half-lives using GSI Fragment separator, MUSIC ionization chamber; and RISING array. 188,190,192W; deduced levels, J, π, logft. Comparison with interacting boson approximation (IBA-1) calculations for 190W. Z=56-80, N=84-122; discussed systematics of first 2+ and 4+ states, B(E2), and γ deformation parameter in even-even nuclei.

doi: 10.1103/PhysRevC.80.064308
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2009BE37      Phys.Rev. C 80, 044333 (2009)

L.Bettermann, S.Heinze, J.Jolie, D.Mucher, O.Moller, C.Scholl, R.F.Casten, D.Meyer, G.Graw, R.Hertenberger, H.-F.Wirth, D.Bucurescu

High-resolution study of 0+ states in 170Yb

NUCLEAR REACTIONS 172Yb(p, t), E=25 MeV; measured triton spectra, σ, σ(θ). 170Yb; deduced levels, J, π. Comparison with sd- and sdpf-interacting boson model (IBM) calculations.

doi: 10.1103/PhysRevC.80.044333
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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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2009BO23      Phys.Rev. C 80, 034311 (2009); Erratum Phys.Rev. C 80, 049902 (2009)

D.Bonatsos, E.A.McCutchan, R.F.Casten, R.J.Casperson, V.Werner, E.Williams

Regularities and symmetries of subsets of collective 0+ states

doi: 10.1103/PhysRevC.80.034311
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2009CA03      Phys.Rev.Lett. 102, 082501 (2009)

R.B.Cakirli, R.F.Casten, R.Winkler, K.Blaum, M.Kowalska

Enhanced Sensitivity of Nuclear Binding Energies to Collective Structure

NUCLEAR STRUCTURE Sn, Ba, Dy, Hf, Pb; calculated two-neutron separation energies.

doi: 10.1103/PhysRevLett.102.082501
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2009CA15      Acta Phys.Pol. B40, 493 (2009)

R.F.Casten, R.B.Cakirli

Evolution of Structure in Nuclei: Meditation by Sub-Shell Modifications and Relation to Binding Energies


2009CH08      Phys.Rev.Lett. 102, 122503 (2009)

L.Chen, Yu.A.Litvinov, W.R.Plass, K.Beckert, P.Beller, F.Bosch, D.Boutin, L.Caceres, R.B.Cakirli, J.J.Carroll, R.F.Casten, R.S.Chakrawarthy, D.M.Cullen, I.J.Cullen, B.Franzke, H.Geissel, J.Gerl, M.Gorska, G.A.Jones, A.Kishada, R.Knobel, C.Kozhuharov, S.A.Litvinov, Z.Liu, S.Mandal, F.Montes, G.Munzenberg, F.Nolden, T.Ohtsubo, Z.Patyk, Zs.Podolyak, R.Propri, S.Rigby, N.Saito, T.Saito, C.Scheidenberger, M.Shindo, M.Steck, P.Ugorowski, P.M.Walker, S.Williams, H.Weick, M.Winkler, H.-J.Wollersheim, T.Yamaguchi

Schottky Mass Measurement of the 208Hg Isotope: Implication for the Proton-Neutron Interaction Strength around Doubly Magic 208Pb

ATOMIC MASSES 208Hg; measured atomic mass using time resolved Schottky mass spectrometry.

doi: 10.1103/PhysRevLett.102.122503
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2009CL06      Phys.Rev. C 80, 011303 (2009)

R.M.Clark, R.F.Casten, L.Bettermann, R.Winkler

Unified framework for understanding pair transfer between collective states in atomic nuclei

NUCLEAR REACTIONS 152,154,156,158,160Gd(p, t), (t, p), E not given; calculated two-nucleon transfer IBA cross sections for excited 0+ states. Comparisons with experimental data.

doi: 10.1103/PhysRevC.80.011303
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2009CO03      Phys.Rev. C 79, 024307 (2009)

A.Costin, M.Reese, H.Ai, R.F.Casten, K.Dusling, C.R.Fitzpatrick, G.Gurdal, A.Heinz, E.A.McCutchan, D.A.Meyer, O.Moller, P.Petkov, N.Pietralla, J.Qian, G.Rainovski, V.Werner

Centrifugal stretching along the ground state band of 168Hf

NUCLEAR REACTIONS 124Sn(48Ti, 4n), E=190 MeV; measured Eγ, Iγ, γγ-coin, half-lives of g.s. band members using recoil-distance Doppler-shift method. 168Hf; deduced levels, J, π, B(E2). Comparison with predictions of geometrical confined β soft rotor model involving centrifugal stretching.

doi: 10.1103/PhysRevC.79.024307
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2009NE03      Phys.Rev.Lett. 102, 112501 (2009)

D.Neidherr, G.Audi, D.Beck, K.Blaum, Ch.Bohm, M.Breitenfeldt, R.B.Cakirli, R.F.Casten, S.George, F.Herfurth, A.Herlert, A.Kellerbauer, M.Kowalska, D.Lunney, E.Minaya-Ramirez, S.Naimi, E.Noah, L.Penescu, M.Rosenbusch, S.Schwarz, L.Schweikhard, T.Stora

Discovery of 229Rn and the Structure of the Heaviest Rn and Ra Isotopes from Penning-Trap Mass Measurements

ATOMIC MASSES 220,223,224,225,226,227,228,229Rn; measured masses using ISOLTRAP mass spectrometer.

doi: 10.1103/PhysRevLett.102.112501
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2009NE11      Phys.Rev. C 80, 044323 (2009)

D.Neidherr, R.B.Cakirli, G.Audi, D.Beck, K.Blaum, Ch.Bohm, M.Breitenfeldt, R.F.Casten, S.George, F.Herfurth, A.Herlert, A.Kellerbauer, M.Kowalska, D.Lunney, E.Minaya-Ramirez, S.Naimi, M.Rosenbusch, S.Schwarz, L.Schweikhard

High-precision Penning-trap mass measurements of heavy xenon isotopes for nuclear structure studies

ATOMIC MASSES 136,137,138,139,140,141,142,143,144,145,146Xe; measured masses using the ISOLTRAP double Penning-trap mass spectrometer at ISOLDE-CERN facility. Comparison with earlier measurements and AME-2003 evaluation. Z=50-78, N=78-112; systematics of S(2n) values. N=74-92, Z=52-58, even Z; N=119-141, odd N, Z=84-90, odd Z; Z=50-82, N=82-126; systematics of proton-neutron interaction strengths.

doi: 10.1103/PhysRevC.80.044323
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2008BO13      Phys.Rev.Lett. 100, 142501 (2008)

D.Bonatsos, E.A.McCutchan, R.F.Casten, R.J.Casperson

Simple Empirical Order Parameter for a First-Order Quantum Phase Transition in Atomic Nuclei

doi: 10.1103/PhysRevLett.100.142501
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2008BO22      Phys.Rev.Lett. 101, 022501 (2008)

D.Bonatsos, E.A.McCutchan, R.F.Casten

Unified Description of 0+ States in a Large Class of Nuclear Collective Models

NUCLEAR STRUCTURE 150Nd, 152Sm, 154,156,158Gd; calculated level energies for 0+ states using collective models. Compared results to data.

doi: 10.1103/PhysRevLett.101.022501
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2008CA21      Phys.Rev. C 78, 041301 (2008)

R.B.Cakirli, R.F.Casten

Empirical signature for shape transitions mediated by sub-shell changes

NUCLEAR STRUCTURE A=32, 100, 120, 150, 190, 220; Z=10-20, 38-46, 52-60, 56-68, 72-80, 84-94; analyzed 2+ level energies, ratios of 4+ to 2+ level energies, B(E2) values.

doi: 10.1103/PhysRevC.78.041301
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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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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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2008MC02      Phys.Rev. C 77, 054320 (2008)

E.A.McCutchan, R.F.Casten

Classes of β-γ mixing and E0 transitions in deformed nuclei

NUCLEAR STRUCTURE A=150-186 (even-even), Nd, Sm, Gd, Dy, Er, Yb, Hf, W, Os; analyzed branching ratios, B(E2), X(E0/E2), effects of β-γ mixing for even-even nuclides.

doi: 10.1103/PhysRevC.77.054320
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2008MC04      Phys.Rev. C 78, 014320 (2008)

E.A.McCutchan, R.F.Casten, V.Werner, R.Winkler, R.B.Cakirli, G.Gurdal, X.Liang, E.Williams

β decay spectroscopy of 192Pt and the nature of 0+ excitations

RADIOACTIVITY 192Au(β+)(EC); measured Eγ, Iγ, γγ-coin. 192Pt; deduced levels, J, π, B(E2). 172,174,176,178,180,182,184,186,188,190,192,194Pt; systematics. Comparison with model calculations.

doi: 10.1103/PhysRevC.78.014320
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2008ME02      Phys.Rev. C 77, 014307 (2008)

A.F.Mertz, E.A.McCutchan, R.F.Casten, R.J.Casperson, A.Heinz, B.Huber, R.Luttke, J.Qian, B.Shoraka, J.R.Terry, V.Werner, E.Williams, R.Winkler

First experimental test of X(5) critical-point symmetry in the A ∼ 130 mass region: Low-spin states and the collective structure of 130Ce

RADIOACTIVITY 130Pr(β+)(EC) [from 107Ag(27Al, p3n), E=113 MeV]; measured Eγ, Iγ, γγ-coin. 130Ce; deduced levels, J, π, B(E2), comparison with calculations using X(5) and IBA models.

doi: 10.1103/PhysRevC.77.014307
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2008WE07      Phys.Rev. C 78, 031301 (2008)

V.Werner, N.Benczer-Koller, G.Kumbartzki, J.D.Holt, P.Boutachkov, E.Stefanova, M.Perry, N.Pietralla, H.Ai, K.Aleksandrova, G.Anderson, R.B.Cakirli, R.J.Casperson, R.F.Casten, M.Chamberlain, C.Copos, B.Darakchieva, S.Eckel, M.Evtimova, C.R.Fitzpatrick, A.B.Garnsworthy, G.Gurdal, A.Heinz, D.Kovacheva, C.Lambie-Hanson, X.Liang, P.Manchev, E.A.McCutchan, D.A.Meyer, J.Qian, A.Schmidt, N.J.Thompson, E.Williams, R.Winkler

Evidence for the microscopic formation of mixed-symmetry states from magnetic moment measurements

NUCLEAR REACTIONS C(92Zr, 92Zr'), (94Zr, 94Zr'), E=275 MeV; measured Eγ, Iγ, (particle)γ-coin. Comparison with shell model and quasiparticle phonon model calculations.

NUCLEAR MOMENTS C(92Zr, 92Zr'), (94Zr, 94Zr'), E=275 MeV; 92,94Zr; measured g factors. Transient field technique.

doi: 10.1103/PhysRevC.78.031301
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2008WE09      Phys.Rev. C 78, 051303 (2008)

V.Werner, E.Williams, R.J.Casperson, R.F.Casten, C.Scholl, P.von Brentano

Deformation crossing near the first-order shape-phase transition in 152-156Gd

NUCLEAR STRUCTURE 152,154,156Gd; analyzed B(E2) values; deduced quadrupole shape invariant, spherical-to-deformed phase transitions. Comparisons with Interacting Boson Model.

doi: 10.1103/PhysRevC.78.051303
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2007AM02      Phys.Rev. C 75, 037301 (2007)

L.Amon, R.F.Casten

Extended locus of regular nuclei along the Arc of Regularity

doi: 10.1103/PhysRevC.75.037301
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2007AS05      Acta Phys.Pol. B38, 1385 (2007)

S.F.Ashley, A.Linnemann, J.Jolie, P.H.Regan, K.Andgren, A.Dewald, E.A.McCutchan, B.Melon, O.Moller, N.V.Zamfir, L.Amon, N.Boelaert, R.B.Cakirli, R.F.Casten, R.M.Clark, C.Fransen, W.Gelletly, G.Gurdal, M.Heidemann, K.L.Keyes, M.N-.Erduran, D.A.Meyer, A.Papenberg, C.Plettner, G.Rainovski, R.V.Ribas, N.J.Thomas, J.Vinson, D.D.Warner, V.Werner, E.Williams, K.O.Zell

Lifetime Determination of Excited States in 106Cd

NUCLEAR REACTIONS 98Mo(12C, 4n)106Cd, E=60 MeV; 96Mo(13C, 3n)106Cd, E=43 MeV; measured Eγ, Iγ, lifetimes for isomeric states.


2007AS07      Phys.Rev. C 76, 064302 (2007)

S.F.Ashley, P.H.Regan, K.Andgren, E.A.McCutchan, N.V.Zamfir, L.Amon, R.B.Cakirli, R.F.Casten, R.M.Clark, W.Gelletly, G.Gurdal, K.L.Keyes, D.A.Meyer, M.N.Erduran, A.Papenberg, N.Pietralla, C.Plettner, G.Rainovski, R.V.Ribas, N.J.Thomas, J.Vinson, D.D.Warner, V.Werner, E.Williams, H.L.Liu, F.R.Xu

Intrinsic state lifetimes in 103Pd and 106, 107Cd

NUCLEAR REACTIONS 98Mo(12C, 3n), (12C, 4n), (12C, 2nα), (12C, 3nα), E=60 MeV; measured Eγ, Iγ, γγ coin. 103Pd, 106,107Cd; deduced levels, J, π, configurations, lifetimes using recoil distance Doppler shift and differential decay cutoff methods.

doi: 10.1103/PhysRevC.76.064302
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2007BO46      Phys.Rev. C 76, 064312 (2007)

D.Bonatsos, E.A.McCutchan, N.Minkov, R.F.Casten, P.Yotov, D.Lenis, D.Petrellis, I.Yigitoglu

Exactly separable version of the Bohr Hamiltonian with the Davidson potential

NUCLEAR STRUCTURE 154Sm, 156,158,160,162Gd, 158,160,162,164,166Dy, 160,162,164,166,168,170Er, 164,166,168,170,172,174,176,178Yb, 168,170,172,174,176,178,180Hf, 176,178,180,182,184,186W, 180,182,184,186,188Os, 228Ra, 228,230,232Th, 232,234,236,238U, 238,240,242Pu, 248Cm, 250Cf; calculated excitation energy ratios, angular momenta, B(E2) ratios, bandhead energies, deformation parameters using Bohr Hamiltonian with Davidson Potential, compared with experimental values.

doi: 10.1103/PhysRevC.76.064312
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2007BU25      Phys.Atomic Nuclei 70, 1336 (2007)

D.Bucurescu, R.F.Casten, G.Graw, J.Jolie, N.Braun, P.von Brentano, T.Faestermann, S.Heinze, R.Hertenberger, N.Lo Iudice, R.Krucken, M.Mahgoub, D.A.Meyer, O.Moller, D.Mucher, C.Scholl, N.Yu.Shirikova, Y.Sun, A.V.Sushkov, H.-F.Wirth

High-resolution study of 0+ and 2+ excitations in 168Er with the (p, t) reaction

NUCLEAR REACTIONS 170Er(p, t), E=25 MeV; measured reaction product energies energies and angular distributions. 168Er deduced 0+ and 2+ level energies and reaction transfer strength distributions.

doi: 10.1134/S1063778807080030
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2007HA05      Phys.Rev. C 75, 034308 (2007)

A.B.Hayes, D.Cline, C.Y.Wu, H.Ai, H.Amro, C.Beausang, R.F.Casten, J.Gerl, A.A.Hecht, A.Heinz, H.Hua, R.Hughes, R.V.F.Janssens, C.J.Lister, A.O.Macchiavelli, D.A.Meyer, E.F.Moore, P.Napiorkowski, R.C.Pardo, Ch.Schlegel, D.Seweryniak, M.W.Simon, J.Srebrny, R.Teng, K.Vetter, H.J.Wollersheim

Spin dependence of K mixing, strong configuration mixing, and electromagnetic properties of 178Hf

NUCLEAR REACTIONS 178Hf(136Xe, 136Xe'), E=650 MeV; measured prompt and delayed Eγ, Iγ, γγ-, (particle)γ-coin following Coulomb excitation. Ta(178Hf, 178Hf'), E ≈ 700-850 MeV; measured isomer production σ. 178Hf deduced levels, J, π, rotational bands, transition matrix elements, K-mixing features. Gammasphere, Chico arrays.

doi: 10.1103/PhysRevC.75.034308
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2007MC03      Phys.Rev. C 76, 024306 (2007)

E.A.McCutchan, D.Bonatsos, N.V.Zamfir, R.F.Casten

Staggering in γ-band energies and the transition between different structural symmetries in nuclei

doi: 10.1103/PhysRevC.76.024306
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2007MC08      Phys.Rev. C 76, 064307 (2007)

E.A.McCutchan, R.F.Casten, V.Werner, A.Wolf, Z.Berant, R.J.Casperson, A.Heinz, R.Luttke, B.Shoraka, J.R.Terry, E.Williams, R.Winkler

β decay study of 168Hf and a test of new geometrical models

RADIOACTIVITY 168Ta (β+), (EC) [from 159Tb(16O, 7n), E=130 MeV]; measured Eγ, Iγ, γγ-coin, γγ(θ). 168Hf; deduced levels, J, π, multipolarities, mixing ratios, B(E2). Compared with calculations using CBS and Davidson models and IBA model. 166,168Yb; measured Eγ.

doi: 10.1103/PhysRevC.76.064307
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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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2007ST06      Phys.Rev.Lett. 98, 132502 (2007)

M.Stoitsov, R.B.Cakirli, R.F.Casten, W.Nazarewicz, W.Satula

Empirical Proton-Neutron Interactions and Nuclear Density Functional Theory: Global, Regional, and Local Comparisons

NUCLEAR STRUCTURE Z=6-92; Cd, Er, Pb, Ra, U; analyzed binding energy differences, valence proton-neutron interactions in even-even nuclides.

doi: 10.1103/PhysRevLett.98.132502
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2007TH07      Acta Phys.Pol. B38, 1381 (2007)

N.J.Thompson, P.H.Regan, A.B.Garnsworthy, A.D.Ayangeakaa, H.C.Ai, L.Amon, R.B.Cakirli, R.F.Casten, C.R.Fitzpatrick, S.J.Freeman, G.Guerdal, A.Heinz, G.A.Jones, E.A.McCutchan, J.Qian, V.Werner, S.J.Williams, R.Winkler

Spectroscopy of 91Zr51 at Medium to High Spins

NUCLEAR REACTIONS 82Se(13C, 4n)91Zr, E=50 MeV; measured Eγ, Iγ, γγ-coinc. 91Zr deduced levels, J, π.


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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2006AP01      Nucl.Phys. A764, 42 (2006)

A.Aprahamian, X.Wu, S.R.Lesher, D.D.Warner, W.Gelletly, H.G.Borner, F.Hoyler, K.Schreckenbach, R.F.Casten, Z.R.Shi, D.Kusnezov, M.Ibrahim, A.O.Macchiavelli, M.A.Brinkman, J.A.Becker

Complete spectroscopy of the 162Dy nucleus

NUCLEAR REACTIONS 161Dy(n, γ), E=0.03-2 MeV; measured Eγ, Iγ, E(ce), I(ce). 160Gd(α, 2n), E=256 MeV; measured Eγ, Iγ, γγ-coin. 162Dy deduced levels, K, J, π, ICC, configurations, collective features. Complete spectroscopy, Ritz combination principle.

doi: 10.1016/j.nuclphysa.2005.09.020
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2006BA75      Int.J.Mod.Phys. E15, 1735 (2006)

D.L.Balabanski, K.A.Gladnishki, G.Lo Bianco, A.Saltarelli, N.V.Zamfir, E.A.McCutchan, H.Ai, R.F.Casten, A.Heinz, D.A.Meyer, C.Plettner, J.Qian, V.Werner, E.Williams, B.Akkus, L.Amon, R.B.Cakirli, M.N.Erduran, Y.Oktem, S.F.Ashley, P.H.Regan, G.Rainovski

Evidence for X(5) critical point symmetry in 128Ce

NUCLEAR REACTIONS 100Mo(32S, 4n), E=120 MeV; measured Eγ, Iγ, γγ-coin, DSA. 128Ce levels deduced T1/2, B(E2), symmetry features. DSAM and recoil-distance techniques.

doi: 10.1142/S0218301306005538
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2006BO10      Phys.Rev. C 73, 034314 (2006)

H.G.Borner, P.Mutti, M.Jentschel, N.V.Zamfir, R.F.Casten, E.A.McCutchan, R.Krucken

Low-energy phonon structure of 150Sm

NUCLEAR REACTIONS 149Sm(n, γ), E=thermal; measured Eγ, Iγ. 150Sm deduced levels, J, π, T1/2, B(E2), phase transition features. Gamma-ray-induced Doppler broadening technique, GAMS4 spectrometer, comparison with IBA model predictions.

doi: 10.1103/PhysRevC.73.034314
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2006BR05      Phys.Rev. C 73, 034315 (2006)

D.S.Brenner, R.B.Cakirli, R.F.Casten

Valence proton-neutron interactions throughout the mass surface

NUCLEAR STRUCTURE Z=4-82; analyzed atomic masses, average proton-neutron interaction energies; deduced systematic features.

doi: 10.1103/PhysRevC.73.034315
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2006BU09      Phys.Rev. C 73, 064309 (2006)

D.Bucurescu, G.Graw, R.Hertenberger, H.-F.Wirth, N.Lo Iudice, A.V.Sushkov, N.Yu.Shirikova, Y.Sun, T.Faestermann, R.Krucken, M.Mahgoub, J.Jolie, P.von Brentano, N.Braun, S.Heinze, O.Moller, D.Mucher, C.Scholl, R.F.Casten, D.A.Meyer

High-resolution study of 0+ and 2+ excitations in 168Er with the (p, t) reaction

NUCLEAR REACTIONS 170Er(p, t), E=25 MeV; measured triton spectra, σ(E, θ). 168Er deduced levels, J, π, configurations. Comparison with quasiparticle-phonon model and projected shell model predictions.

doi: 10.1103/PhysRevC.73.064309
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2006CA15      Phys.Rev.Lett. 96, 132501 (2006)

R.B.Cakirli, R.F.Casten

Direct Empirical Correlation between Proton-Neutron Interaction Strengths and the Growth of Collectivity in Nuclei

NUCLEAR STRUCTURE Z=50-82; analyzed collective features; deduced correlation with proton-neutron interaction strength.

doi: 10.1103/PhysRevLett.96.132501
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2006FE06      Phys.Rev. C 73, 051301 (2006)

M.S.Fetea, R.B.Cakirli, R.F.Casten, D.D.Warner, E.A.McCutchan, D.A.Meyer, A.Heinz, H.Ai, G.Gurdal, J.Qian, R.Winkler

First test of the E(5/4) Bose-Fermi symmetry: The structure of 135Ba

RADIOACTIVITY 135La(EC) [from 136Ba(p, 2n)]; measured Eγ, Iγ, γγ-coin. 135Ba deduced levels, J, π, B(E2), symmetry features. Comparison with interacting boson-fermion approximation and shell model predictions.

doi: 10.1103/PhysRevC.73.051301
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2006HA04      Phys.Rev.Lett. 96, 042505 (2006)

A.B.Hayes, D.Cline, C.Y.Wu, J.Ai, H.Amro, C.Beausang, R.F.Casten, J.Gerl, A.A.Hecht, A.Heinz, R.Hughes, R.V.F.Janssens, C.J.Lister, A.O.Macchiavelli, D.A.Meyer, E.F.Moore, P.Napiorkowski, R.C.Pardo, Ch.Schlegel, D.Seweryniak, M.W.Simon, J.Srebrny, R.Teng, K.Vetter, H.J.Wollersheim

Breakdown of K Selection in 178Hf

NUCLEAR REACTIONS Ta(178Hf, 178Hf'), E≈ 700-850 MeV; measured delayed Eγ, Iγ following projectile Coulomb excitation; deduced isomer excitation function. 178Hf deduced transition matrix elements, K-mixing features.

RADIOACTIVITY 178mHf(IT) [from Coulomb excitation]; measured Eγ, Iγ. 178Hf deduced transition matrix elements, K-mixing features.

doi: 10.1103/PhysRevLett.96.042505
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2006HI12      Eur.Phys.J. A 30, 357 (2006)

Ch.Hinke, R.Krucken, R.F.Casten, V.Werner, N.V.Zamfir

Evolution of 2+γ wave functions and gamma-stiffness in well-deformed rare-earth nuclei

NUCLEAR STRUCTURE 152,154,156,158,160Sm, 154,156,158,160,162Gd, 156,158,160,162,164,166Dy, 160,162,164,166,168Er, 162,164,166,168,170,172,174Yb, 166,168,170,172,174,176,178Hf; calculated gamma-vibrational band head states configurations, neutron and proton distribution functions.

doi: 10.1140/epja/i2006-10129-2
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2006MC02      Phys.Rev. C 73, 034303 (2006)

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

Lifetime measurements of yrast states in 162Yb and 166Hf

NUCLEAR REACTIONS 116Cd(50Ti, 4n), E=200 MeV; 122Sn(48Ti, 4n), E=200 MeV; measured Doppler-shifted Eγ, Iγ, γγ-coin. 162Yb, 166Hf deduced levels T1/2, B(E2). Recoil-distance method, comparison with X(5) critical-point and IBA model predictions.

doi: 10.1103/PhysRevC.73.034303
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2006MC05      Phys.Rev. C 74, 057302 (2006)

E.A.McCutchan, R.F.Casten

Crossing contours in the interacting boson approximation (IBA) symmetry triangle

doi: 10.1103/PhysRevC.74.057302
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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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2006ME13      Phys.Lett. B 638, 44 (2006)

D.A.Meyer, V.Wood, R.F.Casten, C.R.Fitzpatrick, G.Graw, D.Bucurescu, J.Jolie, P.von Brentano, R.Hertenberger, H.-F.Wirth, N.Braun, T.Faestermann, S.Heinze, J.L.Jerke, R.Krucken, M.Mahgoub, O.Moller, D.Mucher, C.Scholl

Enhanced density of low-lying 0+ states: A corroboration of shape phase transitional behavior

NUCLEAR REACTIONS 154,156Gd, 164Dy, 170Er, 178Hf, 182,186W, 192Os(p, t), E=25 MeV; measured triton spectra, σ(E, θ). 152,154Gd, 162Dy, 168Er, 176Hf, 180,184W, 190Os deduced levels, J, π, configurations. Comparison with interacting boson approximation model predictions.

doi: 10.1016/j.physletb.2006.05.007
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2006ME25      Phys.Rev. C 74, 044309 (2006)

D.A.Meyer, V.Wood, R.F.Casten, C.R.Fitzpatrick, G.Graw, D.Bucurescu, J.Jolie, P.von Brentano, R.Hertenberger, H.-F.Wirth, N.Braun, T.Faestermann, S.Heinze, J.L.Jerke, R.Krucken, M.Mahgoub, O.Moller, D.Mucher, C.Scholl

Extensive investigation of 0+ states in rare earth region nuclei

NUCLEAR REACTIONS 154,156Gd, 164Dy, 170Er, 178Hf, 182,186W, 192Os(p, t), E=25 MeV; measured triton spectra, σ(E, θ). 152,154Gd, 162Dy, 168Er, 176Hf, 180,184W, 190Os deduced 0+ level energy distributions.

doi: 10.1103/PhysRevC.74.044309
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2006MO22      Phys.Rev. C 74, 024313 (2006)

O.Moller, A.Dewald, P.Petkov, B.Saha, A.Fitzler, K.Jessen, D.Tonev, T.Klug, S.Heinze, J.Jolie, P.von Brentano, D.Bazzacco, C.A.Ur, E.Farnea, M.Axiotis, S.Lunardi, G.de Angelis, D.R.Napoli, N.Marginean, T.Martinez, M.A.Caprio, R.F.Casten

Electromagnetic transition strengths in 156Dy

NUCLEAR REACTIONS 124Sn(36S, 4n), E=155 MeV; measured Doppler-shifted Eγ, Iγ, γγ-coin. 156Dy levels deduced T1/2, B(E2), transition quadrupole moments, symmetry features. GASP array, recoil-distance technique.

doi: 10.1103/PhysRevC.74.024313
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2006OK04      Phys.Rev. C 74, 027304 (2006)

Y.Oktem, R.B.Cakirli, R.F.Casten, R.J.Casperson, D.S.Brenner

Simple interpretation of proton-neutron interactions in rare earth nuclei

NUCLEAR STRUCTURE 156,158,160Gd, 158,160,162,164Dy, 162,164,166,168,170Er, 166,168,170,172,174Yb, 170,172,174,176,178,180Hf, 176,178,180,182W; analyzed proton-neutron interaction data; deduced systematic features.

doi: 10.1103/PhysRevC.74.027304
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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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2006ZH08      Phys.Rev. C 73, 037301 (2006)

J.Zhang, R.F.Casten, A.Wolf, Z.Berant, R.B.Cakirli, N.V.Zamfir, E.A.McCutchan

Consistent interpretation of B(E2) values and g factors in deformed nuclei

NUCLEAR STRUCTURE Z=64-74; analyzed g factors, B(E2) for even-even nuclides, effective size of valence space. Phenomenological model.

doi: 10.1103/PhysRevC.73.037301
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2005AN26      J.Phys.(London) G31, S1563 (2005)

K.Andgren, S.F.Ashley, P.H.Regan, E.A.McCutchan, N.V.Zamfir, L.Amon, R.B.Cakirli, R.F.Casten, R.M.Clark, G.Gurdal, K.L.Keyes, D.A.Meyer, M.N.Erduran, A.Papenberg, N.Pietralla, C.Plettner, G.Rainovski, R.V.Ribas, N.J.Thomas, J.Vinson, D.D.Warner, V.Werner, E.Williams

RDM lifetime measurements in 107Cd

NUCLEAR REACTIONS 98Mo(12C, 3n), E=60 MeV; measured Doppler-shifted Eγ, Iγ, γγ-coin. 107Cd levels deduced T1/2, B(E2). Recoil-distance method.

doi: 10.1088/0954-3899/31/10/033
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2005CA08      Phys.Rev.Lett. 94, 092501 (2005); Erratum Phys.Rev.Lett. 95, 119903 (2005)

R.B.Cakirli, D.S.Brenner, R.F.Casten, E.A.Millman

Proton-Neutron Interactions and the New Atomic Masses

NUCLEAR STRUCTURE Z=50-102; analyzed masses; deduced neutron-proton interaction features.

doi: 10.1103/PhysRevLett.94.092501
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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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2005HU08      Phys.Rev. C 71, 044311 (2005)

R.O.Hughes, N.V.Zamfir, D.C.Radford, C.J.Gross, C.J.Barton, C.Baktash, M.A.Caprio, R.F.Casten, A.Galindo-Uribarri, P.A.Hausladen, E.A.McCutchan, J.J.Ressler, D.Shapira, D.W.Stracener, C.-H.Yu

γ-ray spectroscopy of 132Te through β decay of a 132Sb radioactive beam

RADIOACTIVITY 132Sb(β-) [from U(p, F)]; measured Eγ, Iγ, γγ-coin. 132Te deduced levels, J, π. Clarion array, comparison with model predictions.

doi: 10.1103/PhysRevC.71.044311
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2005KA04      Phys.Rev. C 71, 014319 (2005)

K.Kaneko, R.F.Casten, M.Hasegawa, T.Mizusaki, J.-y.Zhang, E.A.McCutchan, N.V.Zamfir, R.Krucken

Anomalous behavior of the first excited 0+ state in N ≈ Z nuclei

NUCLEAR STRUCTURE Ne, Mg, Ti, Cr, Fe; analyzed excited states energies; deduced role of proton-neutron correlations in anomalous behavior.

doi: 10.1103/PhysRevC.71.014319
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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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2005MC05      Phys.Rev. C 71, 034309 (2005)

E.A.McCutchan, N.V.Zamfir, R.F.Casten

Bridging the gap between X(5) and the interacting boson model

NUCLEAR STRUCTURE 150Nd, 152Sm, 154Gd, 156Dy, 162Yb; calculated yrast band transitions B(E2). Comparison of X(5) and interacting boson model approaches.

doi: 10.1103/PhysRevC.71.034309
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