NSR Query Results
Output year order : Descending NSR database version of April 11, 2024. Search: Author = I.Ahmad Found 465 matches. Showing 1 to 100. [Next]2022AH03 Phys.Rev. C 106, 064329 (2022) I.Ahmad, F.G.Kondev, M.Gott, J.P.Greene, K.Teh α decay of the longest-lived Cm isotope: 24796Cm RADIOACTIVITY 247Cm(α); analyzed Eα published in 1971FI01 using new information on calibration standards; measured Eα, Iα, Eγ, Iγ, αγ-coin; deduced γ transition energies and intensities per α-decay. 243Pa; deduced levels, J, π. Source from ORNL with approx. 1.6 Bq activity obtained in late 1960, produced by irradiation of 144Cm in high-flux reactor. Decay measured with Ge detector and planar silicon (PIPS) detector.
doi: 10.1103/PhysRevC.106.064329
2022AM05 Appl.Radiat.Isot. 188, 110379 (2022) N.Amjed, A.Naz, A.M.Wajid, M.N.Aslam, I.Ahmad Nuclear model analysis and optimization of production data of the medically interesting 66, 67, 68Ga via alpha induced reactions on 63, 65Cu targets NUCLEAR REACTIONS 63Cu(α, n), 65Cu(α, n), (α, 2n), E<50 MeV; calculated σ using TALYS 1.9, ALICE-IPPE, and EMPIRE 3.2; deduced evaluated σ by fitting calculated results to experimental data.
doi: 10.1016/j.apradiso.2022.110379
2019AH02 Appl.Radiat.Isot. 145, 106 (2019) Decay properties of 2.05-h 24595Am RADIOACTIVITY 245Am(β-); measured decay products, Eγ, Iγ; deduced γ-ray energies and intensities, decay scheme, J, π.
doi: 10.1016/j.apradiso.2018.11.015
2019AH04 Nucl.Instrum.Methods Phys.Res. A940, 56 (2019) High-precision α-particle energies in the decay of Es, Fm, and Md Isotopes RADIOACTIVITY 251,252,254Es, 251,252,253,254,255,256,257Fm, 255,256,257,258Md(α); analyzed previous data from 1970s at the Argonne National Laboratory with a magnetic spectrometer and with silicon detectors; deduced α-particles precise energies.
doi: 10.1016/j.nima.2019.05.091
2019SH34 Phys.Rev. C 100, 034309 (2019) U.Shirwadkar, S.K.Tandel, P.Chowdhury, T.L.Khoo, I.Ahmad, M.P.Carpenter, J.P.Greene, R.V.F.Janssens, F.G.Kondev, T.Lauritsen, C.J.Lister, D.Peterson, D.Seweryniak, X.Wang, S.Zhu Decay spectroscopy of two-quasiparticle K isomers in 246, 248Cm via inelastic and transfer reactions NUCLEAR REACTIONS 248Cm(209Bi, 209Bi'), 248Cm(209Bi, X)246Cm, E=1450 MeV from ATLAS-ANL accelerator facility, with bursts between 1 μs to 8 s; measured Eγ, Iγ, γγ-coin, half-lives of isomers in 246Cm and 248Cm by γ(t) using Gammasphere array. 246,248Cm; deduced levels, J, π, K-isomers, two-quasineutron Nilsson configurations, reduced K hindrances, persistence of a deformed subshell gap at N=152 near Z≈100 from systematics of Kπ=8-, two-quasineutron isomeric states in N=150, Z=94-102 even-even nuclei.
doi: 10.1103/PhysRevC.100.034309
2019UR01 Phys.Rev. C 99, 064325 (2019) W.Urban, T.Rzaca-Urban, J.Wisniewski, I.Ahmad, A.G.Smith, G.S.Simpson Structure of 0+ excitations in the mass A ≈ 100 region: 0+2 bands in 98Sr and 100Zr RADIOACTIVITY 248Cm, 252Cf(SF); measured Eγ, Iγ, γγ-coin, and γγ(θ)(DCO) using the Eurogam2 and Gammasphere arrays for γ detection. 98Sr, 100Zr; deduced levels, J, π, B(E2), bands, configurations. Systematics of 0+ states, and β deformation in 90,92,94,96,98,100Sr, 92,94,96,98,100,102Zr, 94,96,98,100,102,104,106Mo, 96,98,100,102,104,106,108,110Ru, 100,104,106,108,110,112Pd, 106,108,110,112,114Cd, 108,110,112,114,116Sn.
doi: 10.1103/PhysRevC.99.064325
2019UR02 Phys.Rev. C 100, 014319 (2019) W.Urban, T.Rzaca-Urban, J.Wisniewski, A.G.Smith, G.S.Simpson, I.Ahmad First observation of γ-soft and triaxial bands in Zr isotopes RADIOACTIVITY 248Cm, 252Cf(SF); measured Eγ, Iγ, γγ-coin, and γγ(θ) using the Eurogam2 array at ILL-Grenoble, and Gammasphere array at ANL. 100,102Zr; deduced high-spin levels, J, π, multipolarities, mixing ratios, triaxial and γ bands, alignments and staggering in bands, γ softness and triaxiality in Zr isotopes.
doi: 10.1103/PhysRevC.100.014319
2018AH01 Phys.Rev. C 97, 014324 (2018) I.Ahmad, F.G.Kondev, J.P.Greene, S.Zhu Decay properties of 24397BK and 24497BK RADIOACTIVITY 243,244Bk(EC)[from 241Am(α, n), (α, 2n) followed by mass separation]; measured Eγ, Iγ, Cm x rays. 243,244Cm; deduced levels, J, π, ϵ feedings, logft values, configurations, 1/2[620] Nilsson orbital and band in 243Cm, octupole vibrational band and two-quasiparticle Nilsson states in 244Cm. Comparison with previous experimental results. 244Bk; discussed ground state Nilsson configuration.
doi: 10.1103/PhysRevC.97.014324
2018LO18 Phys.Rev. C 98, 024323 (2018) R.Lozeva, E.A.Stefanova, H.Naidja, F.Nowacki, T.Rzaca-Urban, J.Wisniewski, W.Urban, I.Ahmad, A.Blanc, G.De France, F.Didierjean, G.Duchene, H.Faust, J.P.Greene, U.Koster, P.Mutti, G.Simpson, A.G.Smith, T.Soldner, C.A.Ur New yrast and non-yrast states in 136I and medium-spin structure of 136I and 136Xe : Roles of the proton d5/2 and the neutron h9/2 orbitals beyond 132Sn NUCLEAR REACTIONS 235U, 241Pu(n, F)136I, E=thermal; measured Eγ, Iγ, γγ-coin, γγ(θ), γγ(linear pol) using the EXILL-FATIMA system, EXOGAM and EUROGAM clover HPGe detectors at ILL, Grenoble. 136I; deduced yrast and non-yrast levels, J, π, conversion coefficients, multipolarities, mixing ratios, configurations. Comparison with large scale shell-model calculations. RADIOACTIVITY 248Cm, 252Cf(SF); 136Te, 136I(β-)[136Te from 235U(n, F), E=thermal followed by separation of 136Te using Lohengrin fission-fragment separator at Grenoble, and 136I from 136Te decay]; measured Eγ, Iγ, γγ-coin, γγ(θ), γγ(lin pol). 136I, 136Xe; deduced levels, J, π, conversion coefficients, multipolarities, mixing ratios, configurations, Gamow-Teller strengths. Comparison with large scale shell-model calculations.
doi: 10.1103/PhysRevC.98.024323
2017NA15 Phys.Rev. C 95, 064303 (2017) H.Naidja, F.Nowacki, B.Bounthong, M.Czerwinski, T.Rzaca-Urban, T.Roginski, W.Urban, J.Wisniewski, K.Sieja, A.G.Smith, J.F.Smith, G.S.Simpson, I.Ahmad, J.P.Greene New excitations in 142Ba and 144Ce: Evolution of γ bands in the N=86 isotones RADIOACTIVITY 252Cf(SF); 144La(β-)[from 252Cf SF]; measured Eγ, Iγ, γγ-coin, γγ(θ) using Gammasphere array at Argonne National Laboratory. 142Ba, 144Ce; deduced high-spin levels, J, π, multipolarity, mixing ratios. 140Xe; deduced multipolarity and mixing ratios from γγ(θ) data. Comparison with large-scale shell-model calculations. NUCLEAR STRUCTURE 142Ba, 144Ce; calculated levels, J, π, quadrupole moments, B(E2), potential energy surfaces in (β, γ) plane using large-scale shell-model. Comparison with experimental data.
doi: 10.1103/PhysRevC.95.064303
2017UR03 Phys.Rev. C 96, 044333 (2017) W.Urban, M.Czerwinski, J.Kurpeta, T.Rzaca-Urban, J.Wisniewski, T.Materna, L.W.Iskra, A.G.Smith, I.Ahmad, A.Blanc, H.Faust, U.Koster, M.Jentschel, P.Mutti, T.Soldner, G.S.Simpson, J.A.Pinston, G.de France, C.A.Ur, V.-V.Elomaa, T.Eronen, J.Hakala, A.Jokinen, A.Kankainen, I.D.Moore, J.Rissanen, A.Saastamoinen, J.Szerypo, C.Weber, J.Aysto Shape coexistence in the odd-odd nucleus 98Y: The role of the g9/2 neutron extruder NUCLEAR REACTIONS 235U(n, F), E=cold neutrons from PF1B facility at ILL Grenoble; measured Eγ, Iγ, γγ-coin, delayed γγ-coin, half-lives of several isomers in 98Y using the EXILL array at Grenoble. 98Y; deduced levels, isomers, J, π, bands, configurations, deformed and spherical isomers. RADIOACTIVITY 248Cm, 252Cf(SF); measured Eγ, Iγ, γγ-coin, γγ(θ), γγ-coin with γ rays from fission partner 147La in 248Cm SF decay using Eurogam2 array at Grenoble and Gammasphere array at Argonne. 98Y; deduced levels, J, π, multipolarities. 98Sr, 98,98mY(β-)[from 235U(n, F), E=cold neutrons and using Lohengrin fission-fragment separator]; measured Eγ, Iγ, γγ-coin, γγ(θ), γγ(linear pol), half-lives of decays of 98Sr, 98Y and 98Y isomer, excitation energy of the 2.36-s isomer in 98Y by using JYFLTRAP Penning trap at Jyvaskyla accelerator facility, . 98Y, 98Zr; deduced levels, J, π, multipolarities, mixing ratios, β feedings, logft, configurations. Comparison of negative-parity levels in 98Y with Interacting Boson Fermion Fermion Model (IBFFM) and Quasi-Particle Rotor Model (QPRM) calculations.
doi: 10.1103/PhysRevC.96.044333
2017WI15 Phys.Rev. C 96, 064301 (2017) J.Wisniewski, W.Urban, T.Rzaca-Urban, A.G.Smith, J.F.Smith, G.S.Simpson, I.Ahmad, J.P.Greene Parity-doublet structure in the 14757La90 nucleus RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγγ-coin, γγ(θ) using Gammasphere array at ANL. 147La; deduced high-spin levels, J, π, multipolarities, multipole mixing ratios, parity-doublet structures, alignments, configurations, B(E1)/B(E2) ratios, intrinsic electric dipole moment D0, octupole correlations, Systematics of 3/2+, 5/2+, 7/2+, 3/2-, 7/2- and 11/2- levels in 139,141,143,145,147,149La.
doi: 10.1103/PhysRevC.96.064301
2016HO13 Phys.Rev. C 94, 021303 (2016) S.S.Hota, S.K.Tandel, P.Chowdhury, I.Ahmad, M.P.Carpenter, C.J.Chiara, J.P.Greene, C.R.Hoffman, E.G.Jackson, R.V.F.Janssens, B.P.Kay, T.L.Khoo, F.G.Kondev, S.Lakshmi, S.Lalkovski, T.Lauritsen, C.J.Lister, E.A.McCutchan, K.Moran, D.Peterson, U.Shirwadkar, D.Seweryniak, I.Stefanescu, Y.Toh, S.Zhu Population and decay of a Kπ = 8- two-quasineutron isomer in 244Pu NUCLEAR REACTIONS 244Pu(208Pb, 208Pb'), E=1430 MeV; 244Pu(47Ti, 47TI'), E=305 MeV; measured Eγ, Iγ, γγ-coin, M1/E2 branching ratios, prompt and off-beam γ rays, half-life of a 2-qp 8- isomer using Gammasphere array at ATLAS-ANL. 244Pu; deduced high-spin levels, J, π, rotational bands, multipolarity, configurations, kinematic and dynamic moments of inertia, (gk-gR)/Q0, reduced hindrance factors for transitions from the isomer. Comparison with multi-qp calculations using Woods-Saxon potential and Lipkin-Nogami pairing. Systematics of moment of inertia plots and 8- isomers for 244Pu, 250Fm and 252No.
doi: 10.1103/PhysRevC.94.021303
2016UR01 Phys.Rev. C 93, 034326 (2016) W.Urban, K.Sieja, T.Rzaca-Urban, M.Czerwinski, H.Naidja, F.Nowacki, A.G.Smith, I.Ahmad First evidence of γ collectivity close to the doubly magic core 132Sn RADIOACTIVITY 248Cm(SF); measured Eγ, Iγ, γγ-coin, γγ(θ) using EUROGAM2 array. 138Te, 140Xe; deduced high-spin levels, J, π, bands, multipolarities, mixing ratios, configurations. Comparison with shell-model calculations. Systematics of negative- and positive-parity levels in N=86 isotones 136Sn, 138Te, 140Xe, 142Ba, 144Ce, 146Nd, 148Sm, 150Gd. 106,108Ru; observed γ rays. NUCLEAR STRUCTURE 138Te, 140Xe; calculated levels, J, π, B(E2), quadrupole moments, deformation parameter β using shell model.
doi: 10.1103/PhysRevC.93.034326
2015AH03 Phys.Rev. C 91, 044310 (2015) I.Ahmad, J.P.Greene, F.G.Kondev, S.Zhu High-resolution α and electron spectroscopy of 98249Cf RADIOACTIVITY 249Cf(α); measured Eα, Iα, E(ce), I(ce), Eg, Iγ, αγ-, γγ-coin using Argonne double-focusing magnetic spectrometer, planar silicon (PIPS) detector, cooled Si(Li) spectrometer, and LEPS detector. 245Cm; deduced levels, J, π, conversion coefficients for K and higher shells, multipolarity, alpha branching ratios and hindrance factors, bands, configurations, anomalous E1 conversion coefficients. Systematics of anomalous E1 conversion coefficients for E1 transitions in 227Ac, 231,233Pa, 237Np, 239Pu, 243Am, 245Cm.
doi: 10.1103/PhysRevC.91.044310
2015AH04 Phys.Rev. C 92, 024313 (2015) I.Ahmad, R.R.Chasman, J.P.Greene, F.G.Kondev, S.Zhu Electron capture decay of 58-min 22992U and levels in 22991Pa RADIOACTIVITY 229U(EC)[from 229Th(α, 4n) and 230Th(3He, 4n)]; measured Eγ, Iγ, E(x ray), I(x ray), E(ce), I(ce), γ(x ray)-, γγ-coin, half-life of 229U ground state. 229Pa; deduced levels, J, π, conversion coefficients, multipolarity, EC feedings, logft, Nilsson configurations. Discussed splitting of 5/2+ and 5/2- doublet and signature of octupole deformation. Comparison with shell-model calculations of level structure in 229,231Pa. 225Th, 221Ra(α)[from 229U -> 225Th α decay chain]; measured Eγ, Iγ, E(ce), I(ce). 217Rn, 221Ra; deduced levels, conversion coefficients, multipolarity.
doi: 10.1103/PhysRevC.92.024313
2015CH57 Phys.Rev. C 92, 044330 (2015) J.Chen, F.G.Kondev, I.Ahmad, M.P.Carpenter, J.P.Greene, R.V.F.Janssens, S.Zhu, D.Ehst, V.Makarashvili, D.Rotsch, N.A.Smith Precise absolute γ-ray and β--decay branching intensities in the decay of 6729Cu RADIOACTIVITY 67Cu(β-)[from 68Zn(γ, p), E=36 MeV at Argonne Low Energy Accelerator Facility]; measured Eγ, Iγ, Eβ, Iβ, ce, βγ-coin, half-life of isomer in 67Zn, Q(β-) from Fermi-Kurie plots. 67Zn; deduced levels, γ-ray emission probabilities, β-decay branching ratios. Monte Carlo simulations of electron detector efficiency as a function of the β- particle energy using MCNPX code. Comparison with previous experimental values, and with evaluated data.
doi: 10.1103/PhysRevC.92.044330
2015DA12 Phys.Rev.Lett. 115, 132502 (2015) H.M.David, J.Chen, D.Seweryniak, F.G.Kondev, J.M.Gates, K.E.Gregorich, I.Ahmad, M.Albers, M.Alcorta, B.B.Back, B.Baartman, P.F.Bertone, L.A.Bernstein, C.M.Campbell, M.P.Carpenter, C.J.Chiara, R.M.Clark, M.Cromaz, D.T.Doherty, G.D.Dracoulis, N.E.Esker, P.Fallon, O.R.Gothe, J.P.Greene, P.T.Greenlees, D.J.Hartley, K.Hauschild, C.R.Hoffman, S.S.Hota, R.V.F.Janssens, T.L.Khoo, J.Konki, J.T.Kwarsick, T.Lauritsen, A.O.Macchiavelli, P.R.Mudder, C.Nair, Y.Qiu, J.Rissanen, A.M.Rogers, P.Ruotsalainen, G.Savard, S.Stolze, A.Wiens, S.Zhu Decay and Fission Hindrance of Two- and Four-Quasiparticle K Isomers in 254Rf NUCLEAR REACTIONS 206Pb(50Ti, 2n)254Rf, E=242.5 MeV; measured reaction products, Eγ, Iγ, Eβ, Iβ; deduced energy levels, J, π, isomer T1/2, unprecedented fission hindrance relative to the ground state. Comparison with multiquasiparticle calculations.
doi: 10.1103/PhysRevLett.115.132502
2015KO05 Phys.Rev. C 91, 027303 (2015) A.Korgul, P.Baczyk, W.Urban, T.Rzaca-Urban, A.G.Smith, I.Ahmad Investigation of the i13/2 neutron orbital in the 132Sn region: New excited levels in 135Sb RADIOACTIVITY 248Cm(SF); measured Eγ, Iγ, γγ-coin, γγ(θ) using EUROGAM2 detector array. 135Sb; deduced high-spin levels, J, π, multipolarity, configuration. 132Sn; deduced energy of the i13/2 neutron single-particle orbital. Comparison with shell-model calculations using OXBASH code. Systematics of 3- states in N=82 and 13/2+ states in N=83, Sn, Te, Xe, Ba, Ce, Nd and Sm nuclei.
doi: 10.1103/PhysRevC.91.027303
2014CH47 Phys.Rev. C 90, 044302 (2014) J.Chen, I.Ahmad, J.P.Greene, F.G.Kondev Precise measurements of the 24997Bk ground state half-life and the β- decay end-point energy RADIOACTIVITY 249Bk(β-), (α); measured Eγ, Iγ, Eβ, Iβ, half-life of 249Bk ground state; deduced end-point energy, Q(β-), mass excess of 249Bk. Comparison with other experimental results and AME-12 evaluation.
doi: 10.1103/PhysRevC.90.044302
2014GA01 Hyperfine Interactions 223, 201 (2014) A.Garcia, S.Sjue, E.Swanson, C.Wrede, D.Melconian, A.Algora, I.Ahmad Decay studies for neutrino physics RADIOACTIVITY 100Tc, 116In(β-); measured decay products, Eβ, Iβ, X-rays; deduced branching ratios. Comparison with available data.
doi: 10.1007/s10751-012-0619-2
2014HO03 Chin.Phys.C 38, 024103 (2014) I.Hossain, H.Y.Abdullah, I.M.Ahmad, M.A.Saeed B(E2) value of even-even 108-112Pd isotopes by interacting boson model-1 NUCLEAR STRUCTURE 108,110,112Pd; calculated B(E2), quadrupole moments and deformation parameters. IBM-1 model, comparison with experimental data.
doi: 10.1088/1674-1137/38/2/024103
2014HO16 Phys.Lett. B 739, 13 (2014) S.S.Hota, P.Chowdhury, T.L.Khoo, M.P.Carpenter, R.V.F.Janssens, Y.Qiu, I.Ahmad, J.P.Greene, S.K.Tandel, D.Seweryniak, S.Zhu, P.F.Bertone, C.J.Chiara, A.Y.Deo, N.D'Olympia, S.Gros, C.J.Guess, T.Harrington, D.J.Hartley, G.Henning, C.R.Hoffman, E.G.Jacksona, F.G.Kondev, S.Lakshmi, T.Lauritsen, C.J.Lister, E.A.McCutchan, K.Moran, C.Nair, D.Peterson, U.Shirwadkar, I.Stefanescu N=151 Pu, Cm and Cf nuclei under rotational stress: Role of higher-order deformations NUCLEAR REACTIONS 244Pu, 249Cf(208Pb, X)242Pu/243Pu/244Pu/245Pu/246Pu/248Cf/249Cf/250Cf, 248Cm(209Bi, X)246Cm/247Cm/248Cm/249Cm/250Cm, E not given; measured reaction products, Eγ, Iγ. 245Pu, 247Cm, 249Cf; deduced energy levels, J, π, rotational bands, high-spins, deformations. Comparison with available data, Cranked WS model.
doi: 10.1016/j.physletb.2014.10.021
2014KU28 Phys.Rev. C 90, 064315 (2014) J.Kurpeta, W.Urban, A.Plochocki, T.Rzaca-Urban, A.G.Smith, J.F.Smith, G.S.Simpson, I.Ahmad, J.P.Greene, A.Jokinen, H.Penttila Neutron configurations in 113Pd RADIOACTIVITY 248Cm, 252Cf(SF); measured prompt Eγ, Iγ, γγ-coin using EOROGAM-II array at Jyvaskyla and Gammasphere array at ANL. 113Pd; deduced levels, J, π, bands configuration, staggering, alignments Comparison with band structures of 109Mo, 109,112,113Pd, 110,111Ru. Discussed possible oblate-shape of low-energy bandheads. 113Rh(β-)[from 238U(p, X), E=25 MeV using IGISOL at Jyvaskyla, followed by mass separation]; measured Eγ, Iγ, Eβ, βγ-, γγ-coin. 113Pd; deduced levels, J, π, logft, configurations, B(GT) strengths and comparison with those from 113Ru to 113Rh decay.
doi: 10.1103/PhysRevC.90.064315
2013AH03 Phys.Rev. C 87, 054328 (2013) I.Ahmad, J.P.Greene, F.G.Kondev, S.Zhu, M.P.Carpenter, R.V.F.Janssens, R.A.Boll, J.G.Ezold, S.M.Van Cleve, E.Browne α decay of 97249Bk and levels in 95245Am RADIOACTIVITY 249Bk(α); measured Eγ, Iγ, Eα, Iα, γα-, γγ-coin, absolute Iγ of 327.45-keV γ ray. Alpha spectra measured using Argonne double-focusing magnetic spectrometer. 249Cf(α)[from 249Bk β- decay]; measured Eα, Eγ. 245Am; deduced levels, J, π, bands, Nilsson configurations, strong Coriolis mixing, hindrance factors. Comparison with previous experimental results. Systematics of low-lying levels in 239,241,243,245Am.
doi: 10.1103/PhysRevC.87.054328
2013CZ02 Phys.Rev. C 88, 044314 (2013) M.Czerwinski, T.Rzaca-Urban, K.Sieja, H.Sliwinska, W.Urban, A.G.Smith, J.F.Smith, G.S.Simpson, I.Ahmad, J.P.Greene, T.Materna Yrast excitations in the neutron-rich N=52 isotones RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin, γγ(θ) using Gammasphere array at ANL. 88Kr; deduced levels, J, π, mixing ratio, multipolarity. 248Cm, 252Cf(SF); measured Eγ, Iγ, γγ-coin using Gammasphere array for 252Cf, and Eurogam2 array in a previous experiment for 248Cm. 86Se; deduced levels, J, π. 160Sm, 162Gd; observed γ rays from γγ-coin with complementary fission fragments. Comparison with shell-model calculations, and systematics of N=52 even-even nuclei. NUCLEAR STRUCTURE 82Zn, 84Ge, 86Se, 88Kr, 90Sr, 94Mo, 96Ru; calculated levels, J, π using shell model. Systematics of yrast states up to 8+ of even-even N=52 Ge, Se, Kr, Sr, Zr, Mo and Ru nuclei. 82Zn; predicted energies of first 2+ and 4+ states from systematics. Comparison with experimental data.
doi: 10.1103/PhysRevC.88.044314
2013RZ01 Phys.Rev. C 87, 031305 (2013) T.Rzaca-Urban, W.Urban, A.G.Smith, I.Ahmad, A.Syntfeld-Kazuch Unexpected 5/2- spin of the ground state in 147Ba: No octupole deformation in ground states of odd-A Ba isotopes RADIOACTIVITY 248Cm(SF); measured Eγ, Iγ, γγ-coin, γγ(θ) using EUROGAM2 array. 147Ba; deduced levels, J, π, bands, multipolarity, alignments. Discussed parity doublets and octupole bands.
doi: 10.1103/PhysRevC.87.031305
2013RZ02 Phys.Rev. C 88, 034302 (2013) T.Rzaca-Urban, M.Czerwinski, W.Urban, A.G.Smith, I.Ahmad, F.Nowacki, K.Sieja First observation of excited states in 87Se: Collectivity and j- 1 anomaly at N=53 RADIOACTIVITY 248Cm(SF); measured Eγ, Iγ, γγ-coin with γ rays from complementary fragments, γγ(θ) using Eurogam2 array; deduced mass correlations. 87Se; deduced levels, J, π, multipolarity, configuration, coexistence of collective and single-particle excitations. Comparison with shell model calculations, and with structure of N=53 neighbors. 86,88Se, 146,148Ce, 156,158,160Sm; observed γ rays. NUCLEAR STRUCTURE 85Ge, 87Se, 89Kr, 91Sr, 93Zr, 95Mo, 97Ru; calculated levels, J, π, yrast states of N=53 isotones, B(E2), B(M1); discussed j-1 anomaly. Large-scale shell model calculations.
doi: 10.1103/PhysRevC.88.034302
2013WR01 Phys.Rev. C 87, 031303 (2013) C.Wrede, S.K.L.Sjue, A.Garcia, H.E.Swanson, I.Ahmad, A.Algora, V.-V.Elomaa, T.Eronen, J.Hakala, A.Jokinen, V.S.Kolhinen, I.D.Moore, H.Penttila, M.Reponen, J.Rissanen, A.Saastamoinen, J.Aysto Electron capture on 116In and implications for nuclear structure related to double-β decay RADIOACTIVITY 116In(EC)[from 115In(d, p), E=7.6 MeV]; measured γ, β, x-ray spectra, β(x ray)-coin using JYFLTRAP at IGISOL facility in Jyvaskyla; deduced EC decay branch, B(GT). Implications for 2νββ and 0νββ decay modes of 116Cd.
doi: 10.1103/PhysRevC.87.031303
2012KO07 Phys.Rev. C 85, 027304 (2012) F.G.Kondev, S.Zhu, M.P.Carpenter, R.V.F.Janssens, I.Ahmad, C.J.Chiara, J.P.Greene, T.Lauritsen, D.Seweryniak, S.Lalkovski, P.Chowdhury M3 and E4 K-forbidden decays of the Kπ=23/2- isomer in 177Lu RADIOACTIVITY 177mLu(IT), (β-)[from 176Lu(n, γ), E=thermal]; measured Eγ, Iγ, γγ-coin using Gammasphere array. 177Lu, 177Hf; deduced levels, J, π, bands, B(E3), B(M3), B(E4), B(M4), B(E5), hindrance factors, configurations.
doi: 10.1103/PhysRevC.85.027304
2012KO23 Appl.Radiat.Isot. 70, 1867 (2012) F.G.Kondev, I.Ahmad, M.P.Carpenter, J.P.Greene, R.V.F.Janssens, T.Lauritsen, D.Seweryniak, S.Zhu, S.P.Lalkovski, P.Chowdhury Gamma-ray emission probabilities in the decay of 177mLu RADIOACTIVITY 177mLu(IT), (β-); measured decay products, Eγ, Iγ; deduced relative and absolute γ-ray emission probabilities. Comparison with available data.
doi: 10.1016/j.apradiso.2012.02.029
2012KU06 Phys.Rev. C 85, 027302 (2012) J.Kurpeta, W.Urban, T.Materna, H.Faust, U.Koster, J.Rissanen, T.Rzaca-Urban, C.Mazzocchi, A.G.Smith, J.F.Smith, J.P.Greene, I.Ahmad Low-spin structure of 85Se and the βn branching of 85As RADIOACTIVITY 85As(β-)[from 235U(n, F)]; measured Eγ, Iγ, βγ-, γγ-coin. 85Se; deduced levels, J, π, configuration. 85As(β-n); discussed delayed neutron decay branch. RADIOACTIVITY 248Cm, 252Cf(SF); measured Eγ, Iγ, γγ-coin for prompt γ rays. 85Se; deduced levels, J, π. Eurogam2 and Gammasphere arrays.
doi: 10.1103/PhysRevC.85.027302
2012MA03 Acta Phys.Pol. B43, 247 (2012) T.Malkiewicz, G.S.Simpson, W.Urban, J.Genevey, J.A.Pinston, I.Ahmad, J.P.Greene, U.Koster, T.Materna, M.Ramdhane, T.Rzaca-Urban, A.G.Smith, G.Thiamova Recent Studies of Odd-A, Neutron-rich Pr Isotopes NUCLEAR REACTIONS 241Am(n, F)151Pr, E=thermal; measured reaction products, Eγ, Iγ; deduced level energies, J, π, E1 multipolarity transition. Comparison with QPRM calculations.
doi: 10.5506/APhysPolB.43.247
2012MA13 Phys.Rev. C 85, 044314 (2012) T.Malkiewicz, G.S.Simpson, W.Urban, J.Genevey, U.Koster, T.Materna, J.A.Pinston, M.Ramdhane, T.Rzaca-Urban, G.Thiamova, A.G.Smith, I.Ahmad, J.P.Greene Near-yrast structure of odd-A, neutron-rich Pr isotopes RADIOACTIVITY 248Cm, 252Cf(SF); measured Eγ, Iγ, γγ-coin, γγ(θ), using EUROGAM-II, and Gammasphere arrays. 151,153Pr; deduced high-spin levels, J, π, multipolarity, rotational bands, alignments, configurations, mass correlation plots. Comparison with reflection-symmetric quasi-particle-rotor model (QPRM) calculations. 93Rb, 99Y, 99,101Zr, 107Tc, 148Ce; measured Eγ, γγ-coin. NUCLEAR REACTIONS 241Am(n, F), E=thermal; measured Eγ, Iγ, ce, (fragment)γ-coin, delayed γ, ce, half-lives. 151Pr; deduced levels, J, π, conversion coefficients, multipolarities, bands, Nilsson configurations. Comparison with QRPM calculations. NUCLEAR STRUCTURE 151,153Pr; calculated levels, J, π, rotational bands. Quasi-particle-rotor model using computer codes GAMPN, ASYRMO, and PROBAMO.
doi: 10.1103/PhysRevC.85.044314
2012RZ01 Phys.Rev. C 86, 044324 (2012) T.Rzaca-Urban, W.Urban, J.A.Pinston, G.S.Simpson, A.G.Smith, I.Ahmad Reflection symmetry of the near-yrast excitations in 145Ba RADIOACTIVITY 248Cm(SF); measured Eγ, Iγ, γγ-coin, γγ(θ) using EUROGAM2 array. 145Ba; deduced high-spin levels, J, π, conversion coefficients, multipolarity, mixing ratios, bands, alignments. Systematics of yrast levels in N=89 isotones 143Xe, 145Ba, 147Ce, 149Nd and 151Sm. Comparison of level energies with quasiparticle-rotor model calculations. No evidence of octupole deformation in the ground state.
doi: 10.1103/PhysRevC.86.044324
2012SM02 Phys.Rev. C 86, 014321 (2012) A.G.Smith, J.L.Durell, W.R.Phillips, W.Urban, P.Sarriguren, I.Ahmad Lifetime measurements and nuclear deformation in the A ≈ 100 region RADIOACTIVITY 248Cm(SF); measured Eγ, γγ-coin, level half-lives by Doppler broadended line shape analysis using EUROGAM-2 array. 96,97,98,100Sr, 98,99,100,101,102,104Zr, 103Nb, 102,103,104,105,106,107,108Mo, 108,109,110,111,112Ru, 114,116Pd; deduced levels, J, π, transition quadrupole moments. Onset of deformation at N AP 60 in Sr and Zr isotopes. Comparison with several theoretical calculations in the context of prolate-oblate shape competition.
doi: 10.1103/PhysRevC.86.014321
2012UR01 Phys.Rev. C 85, 014329 (2012) W.Urban, K.Sieja, G.S.Simpson, T.Soldner, T.Rzaca-Urban, A.Zlomaniec, I.Tsekhanovich, J.A.Dare, A.G.Smith, J.L.Durell, J.F.Smith, R.Orlandi, A.Scherillo, I.Ahmad, J.P.Greene, J.Jolie, A.Linneman Isomeric levels in 92Rb and the structure of neutron-rich 92, 94Rb isotopes RADIOACTIVITY 248Cm, 252Cf(SF); measured Eγ, Iγ, γγ-coin, γγ(θ), half-lives by γ(t), delayed and prompt γ. 92,94Rb; deduced levels, J, π, isomers, multipolarity, configuration, B(E1). EUROGAM2 and the GAMMASPHERE arrays. Comparison with large-scale shell-model calculations. NUCLEAR REACTIONS 235U(n, F), E=thermal; measured fission fragment spectra, Eγ, mass spectra, γ(fission fragment)-coin. 92Rb; deduced level, isomer. NUCLEAR STRUCTURE 92,94Rb; calculated levels, J, π. Large scale shell-model. Comparison with experimental data.
doi: 10.1103/PhysRevC.85.014329
2012UR04 Phys.Rev. C 86, 017301 (2012) W.Urban, T.Rzaca-Urban, A.Syntfeld-Kazuch, A.G.Smith, I.Ahmad Band structure of 149Ce RADIOACTIVITY 248Cm(SF); measured Eγ, Iγ, γγ-coin using EUROGAM2 array; deduced internal conversion coefficients, transition intensities of unobserved transitions. 149Ce; deduced levels, J, π, multipolarity, bands, configurations, B(E1)/B(E2), dipole moment D0, staggering in bands, alignments. No evidence found for parity doublets. Comparison with band structures and staggering in 153Sm, 155Gd.
doi: 10.1103/PhysRevC.86.017301
2012WA16 Phys.Rev. C 85, 057302 (2012) J.C.Walpe, U.Garg, S.Naguleswaran, J.Wei, W.Reviol, I.Ahmad, M.P.Carpenter, T.L.Khoo Lifetime measurements in 182, 186Pt NUCLEAR REACTIONS 154Sm(36S, 4n)186Pt, E=167 MeV; 122Sn(64Ni, 4n)182Pt, E=295 MeV; measured Eγ, Iγ, half-lives of levels in ground-state band by recoil distance Doppler-shift (RDDS) method. 182,186Pt; deduced levels, B(E2), transition quadrupole moments. Comparison with band-mixing calculations.
doi: 10.1103/PhysRevC.85.057302
2011KO32 Nucl.Instrum.Methods Phys.Res. A652, 654 (2011) F.G.Kondev, I.Ahmad, J.P.Greene, A.L.Nichols, M.A.Kellett Measurements of absolute gamma-ray emission probabilities in the decay of 233Pa RADIOACTIVITY 233Pa(β-) [from 237Nb(α)]; measured decay products, Eγ, Iγ, Eα, Iα; deduced γ-emission probabilities. Comparison with experimental data.
doi: 10.1016/j.nima.2011.01.147
2011RO20 Phys.Rev. C 83, 064311 (2011) A.P.Robinson, T.L.Khoo, D.Seweryniak, I.Ahmad, M.Asai, B.B.Back, M.P.Carpenter, P.Chowdhury, C.N.Davids, J.Greene, P.T.Greenlees, K.Hauschild, A.Heinz, R.-D.Herzberg, R.V.F.Janssens, D.G.Jenkins, G.D.Jones, S.Ketelhut, F.G.Kondev, T.Lauritsen, C.J.Lister, A.Lopez-Martens, P.Marley, E.McCutchan, P.Papadakis, D.Peterson, J.Qian, D.Rostron, U.Shirwadkar, I.Stefanescu, S.K.Tandel, X.Wang, S.Zhu Search for a 2-quasiparticle high-K isomer in 256Rf NUCLEAR STRUCTURE 256Rf; calculated ground state and rotational band energies, configurations using Woods-Saxon Potential. NUCLEAR REACTIONS 208Pb(50Ti, 2n), E=240 MeV; measured Eγ, Iγ, ce, γγ-, γ(ce)-coin, γ(t), half-life. 256Rf; deduced levels, J, π, isomers, configurations; calculated energies of two-quasiparticle high-K isomers with the universal Woods-Saxon energies. 170Er(50Ti, 4n)216Th, E=222 MeV; measured Eγ, ce, γ(ce)-coin from isomer, half-life, isomer ratio; used as a test case.
doi: 10.1103/PhysRevC.83.064311
2011RZ01 Phys.Rev. C 83, 067301 (2011) T.Rzaca-Urban, W.Urban, J.A.Pinston, A.G.Smith, I.Ahmad Near-yrast, medium-spin structure of 143Xe RADIOACTIVITY 248Cm(SF); measured Eγ, Iγ, γγ-coin, γγ(θ), using EUROGAM-2 array. 143Xe; deduced levels, J, π, conversion coefficients, multipolarity, bands, configurations. Comparison with quasiparticle-rotor model calculations with a reflection-symmetric potential. Systematics of bandheads of N=89 nuclei.
doi: 10.1103/PhysRevC.83.067301
2011ZH56 Nucl.Instrum.Methods Phys.Res. A652, 231 (2011) S.Zhu, F.G.Kondev, M.P.Carpenter, I.Ahmad, C.J.Chiara, J.P.Greene, G.Gurdal, R.V.F.Janssens, S.Lalkovski, T.Lauritsen, D.Seweryniak γ-ray coincidence and fast-timing measurements using LaBr3(Ce) detectors and gammasphere RADIOACTIVITY 177Lu(IT); measured decay products, Eγ, Iγ; deduced γ-ray energies, J, π, T1/2.
doi: 10.1016/j.nima.2010.10.059
2010HO15 Nucl.Phys. A844, 53c (2010) R.J.Holt, I.Ahmad, K.Bailey, B.Graner, J.P.Greene, W.Korsch, Z.-T.Lu, P.Mueller, T.P.O'Connor, I.A.Sulai, W.L.Trimble Progress toward an EDM measurement in 225Ra
doi: 10.1016/j.nuclphysa.2010.05.013
2010HU02 Phys.Rev. C 81, 014312 (2010) A.M.Hurst, C.Y.Wu, M.A.Stoyer, D.Cline, A.B.Hayes, S.Zhu, M.P.Carpenter, K.Abu Saleem, I.Ahmad, J.A.Becker, C.J.Chiara, J.P.Greene, R.V.F.Janssens, T.L.Khoo, F.G.Kondev, T.Lauritsen, C.J.Lister, G.Mukherjee, S.V.Rigby, D.Seweryniak, I.Stefanescu Rotational alignments in 235Np and the possible role of j15/2 neutrons NUCLEAR REACTIONS 237Np(116Sn, 118Sn)235Np, E=801 MeV; measured Eγ, Iγ, γγ-, (particle)γ-, (fragment)( fragment)γ-coin, and angular distribution of γ-ray yields for 116Sn, 117Sn and 118Sn using the Gammasphere and CHICO arrays. 235Np; deduced levels, J, π, bands, angular momentum, moment of inertia as functions of rotational frequency, configurations. 116,117,118Sn; measured Eγ, γγ-coin. Comparison with cranked shell-model calculations and with alignment plots for 237Np and 241Am.
doi: 10.1103/PhysRevC.81.014312
2010KE05 Phys.Lett. B 692, 297 (2010) G.Kessedjian, B.Jurado, M.Aiche, G.Barreau, A.Bidaud, S.Czajkowski, D.Dassie, B.Haas, L.Mathieu, L.Audouin, N.Capellan, L.Tassan-Got, J.N.Wilson, E.Berthoumieux, F.Gunsing, Ch.Theisen, O.Serot, E.Bauge, I.Ahmad, J.P.Greene, R.V.F.Janssens Neutron-induced fission cross sections of short-lived actinides with the surrogate reaction method NUCLEAR REACTIONS 243Am(3He, d), (3He, t), (3He, α), E=24, 30 MeV; 242,243Cm, 241Am(n, F), E<10 MeV; measured surrogate reaction products; deduced fission σ. Comparison with experimental data, JENDL-3.3, ENDF/B-VII.0 and JEFF-3.1 libraries.
doi: 10.1016/j.physletb.2010.07.048
2010KO27 Appl.Radiat.Isot. 68, 2382 (2010) F.G.Kondev, I.Ahmad, J.P.Greene, M.A.Kellett, A.L.Nichols Measurements of X- and γ-ray emission probabilities in the β- decay of 233Pa RADIOACTIVITY 233Pa(β-) [from 237Np(α)]; measured Eγ, γ; deduced emission probabilities for x-rays and γ-ray transitions.
doi: 10.1016/j.apradiso.2010.06.009
2010MA53 Nucl.Phys. A839, 42 (2010) Microscopic study of deuteron-nucleus total reaction cross section at medium energies NUCLEAR REACTIONS 12C, 16O, 28Si, 40,48Ca, 58,60Ni, 112,116,120,124Sn, 208Pb(d, X), E=37.9, 65.5, 97.4 MeV; calculated σ using the Glauber model. Comparison with data.
doi: 10.1016/j.nuclphysa.2010.03.010
2010MU13 Phys.Rev. C 82, 054316 (2010) G.Mukherjee, P.Chowdhury, F.G.Kondev, P.M.Walker, G.D.Dracoulis, R.D'Alarcao, I.Shestakova, K.Abu Saleem, I.Ahmad, M.P.Carpenter, A.Heinz, R.V.F.Janssens, T.L.Khoo, T.Lauritsen, C.J.Lister, D.Seweryniak, I.Wiedenhoever, D.M.Cullen, C.Wheldon, D.L.Balabanski, M.Danchev, T.M.Goon, D.J.Hartley, L.L.Riedinger, O.Zeidan, M.A.Riley, R.A.Kaye, G.Sletten K-hindered decay of a six-quasiparticle isomer in 176Hf NUCLEAR REACTIONS 130Te(48Ca, 2n), E=194 MeV; measured Eγ, Iγ, γγ-coin, half-lives using Gammasphere array. Beam-on, beam-off measurements of γ spectra. 176Hf; deduced levels, J, π, rotational bands, isomers, multipolarity, configurations, reduced hindrance factors for K-isomers.
doi: 10.1103/PhysRevC.82.054316
2010RZ01 Phys.Rev. C 82, 017301 (2010) T.Rzaca-Urban, W.Urban, J.A.Pinston, G.S.Simpson, J.L.Durell, A.G.Smith, I.Ahmad Medium-spin structure of 145Cs RADIOACTIVITY 248Cm(SF); measured Eγ, Iγ, γγ-coin, γγ(θ) using EUROGAM2 array. 145Cs; deduced levels, J, π, multipolarities, bands, configurations, electric dipole moment D0. 101,102Nb; measured Eγ. Comparison with quasiparticle-rotor model calculations. Z=54-64, N=84-92; systematics of D0 parameter for even nuclei of even neutron number.
doi: 10.1103/PhysRevC.82.017301
2010RZ02 Phys.Rev. C 82, 067304 (2010) T.Rzaca-Urban, W.Urban, J.A.Pinston, G.S.Simpson, A.G.Smith, J.F.Smith, I.Ahmad Near-yrast structure of 149Pr RADIOACTIVITY 248Cm, 252Cf(SF); measured Eγ, Iγ, γγ-coin, conversion coefficients, and half-life of isomer using EUROGAM2 and Gammasphere arrays. 149Pr; deduced levels, J, π, band, multipolarity, B(E1), electric dipole moment, configuration. Comparison with quasiparticle-rotor model calculations. 98,99,100,101Y; measured Eγ, γγ-coin.
doi: 10.1103/PhysRevC.82.067304
2010SE10 Nucl.Phys. A834, 357c (2010) D.Seweryniak, T.L.Khoo, I.Ahmad, F.G.Kondev, A.Robinson, S.K.Tandel, M.Asai, B.B.Back, M.P.Carpenter, P.Chowdhury, C.N.Davids, S.Eeckhaudt, J.P.Greene, P.T.Greenlees, S.Gros, K.Hauschild, A.Heinz, R.-D.Herzberg, R.V.F.Janssens, D.G.Jenkins, G.D.Jones, S.Ketelhut, T.Lauritsen, C.J.Lister, A.Lopez-Martens, P.Marley, E.A.McCutchan, T.Nakatsukasa, P.Papadakis, D.Peterson, J.Qian, D.Rostron, I.Stefanescu, U.S.Tandel, X.F.Wang, S.F.Zhu Bridging the nuclear structure gap between stable and super heavy nuclei NUCLEAR STRUCTURE 249Bk; calculated single-proton energies using different interactions; 252,254No, 256,257Rf; deduced configurations. Comparison with data.
doi: 10.1016/j.nuclphysa.2010.01.039
2010SI03 Phys.Rev. C 81, 024313 (2010) G.S.Simpson, W.Urban, J.A.Pinston, J.C.Angelique, I.Deloncle, H.R.Faust, J.Genevey, U.Koster, T.Materna, R.Orlandi, A.Scherillo, A.G.Smith, J.F.Smith, T.Rzaca-Urban, I.Ahmad, J.P.Greene Near-yrast structure of N=93 neutron-rich lanthanide nuclei NUCLEAR REACTIONS 239Pu(n, F), 241Am(n, F), E=thermal; measured Eγ, Iγ, ce, γγ-, (x ray)γ-, (ce)γ-, (fragment)γ-coin, delayed γ, and half-lives. 153Nd, 155Sm; deduced levels, J, π, conversion coefficients, multipolarities, bands, Nilsson configurations. Comparison with quasiparticle-rotor-model (QPRM) calculations. RADIOACTIVITY 248Cm, 252Cf(SF); measured Eγ, Iγ, γγ-coin, and half-lives using Gammasphere and Eurogam-II arrays. 151Ce, 153Nd; deduced levels, J, π, bands, and configurations. Comparison with quasiparticle-rotor-model (QPRM) calculations. 151Ce, 153Nd, 155Sm, 157Gd, 159Dy; systematics of bandheads.
doi: 10.1103/PhysRevC.81.024313
2010SI17 Phys.Rev. C 82, 024302 (2010) G.S.Simpson, W.Urban, K.Sieja, J.A.Dare, J.Jolie, A.Linneman, R.Orlandi, A.Scherillo, A.G.Smith, T.Soldner, I.Tsekhanovich, B.J.Varley, A.Zlomaniec, J.L.Durell, J.F.Smith, T.Rzaca-Urban, H.Faust, I.Ahmad, J.P.Greene Near-yrast, medium-spin, excited states of 91Rb, 93Rb, and 95Rb NUCLEAR REACTIONS 235U(n, F)93Rb/95Rb; measured Eγ, Iγ, γγ-, (fragment)γ-coin, and half-lives using FIFI fragment identification system and Ge detector array. 93,95Rb; deduced levels, J, π, isomers, transition probabilities, and configurations. Comparison with shell-model calculations. RADIOACTIVITY 248Cm, 252Cf(SF); measured Eγ, Iγ, γγ-coin, γγ(θ), and half-lives using EUROGAM-II and Gammasphere arrays. 91,93,95Rb; deduced levels, J, π, isomers, transition probabilities, and configurations. Comparison with shell-model calculations. Systematics of low-lying levels in 89,91,93,95Rb. 93Rb, 95Y; comparison of experimental and calculated spectra.
doi: 10.1103/PhysRevC.82.024302
2010TA05 Phys.Rev. C 81, 045809 (2010) X.D.Tang, K.E.Rehm, I.Ahmad, C.R.Brune, A.Champagne, J.P.Greene, A.Hecht, D.J.Henderson, R.V.F.Janssens, C.L.Jiang, L.Jisonna, D.Kahl, E.F.Moore, M.Notani, R.C.Pardo, N.Patel, M.Paul, G.Savard, J.P.Schiffer, R.E.Segel, S.Sinha, A.H.Wuosmaa Determination of the E1 component of the low-energy 12C(α, γ)16O cross section RADIOACTIVITY 16N(β-α); measured Eα, Iα, α12C-coin, half-life; deduced E1 component of the S factor for 12C(α, γ)16O reaction using a set of twin ionization chambers. R-matrix analysis. Comparison with previous studies. NUCLEAR REACTIONS 2H(15N, p)15N/16N/16O/20Ne, E=82 MeV; measured fragment yields.
doi: 10.1103/PhysRevC.81.045809
2010TA22 Phys.Rev. C 82, 041301 (2010) S.K.Tandel, P.Chowdhury, S.Lakshmi, U.S.Tandel, I.Ahmad, M.P.Carpenter, S.Gros, R.V.F.Janssens, T.L.Khoo, F.G.Kondev, J.P.Greene, D.J.Hartley, T.Lauritsen, C.J.Lister, D.Peterson, A.Robinson, D.Seweryniak, S.Zhu Rotational bands in odd-A Cm and Cf isotopes: Exploring the highest neutron orbitals NUCLEAR REACTIONS 248Cm(209Bi, 210Bi)247Cm, E=1450 MeV; 250Cm(209Bi, 208Bi)249Cm, E=1450 MeV; 249Cf(207Pb, 207Pb'), E=1430 MeV; measured Eγ, Iγ, γγ-coin using Gammasphere array. 247,249Cm, 249Cf; deduced levels, J, π, (gK-gR)/Q0, alignments, Nilsson configurations, and rotational bands. 197Au, 207Pb, 208Bi, 210Bi; measured Eγ. Systematics of alignments for 244Pu, 246Cm, 248Cf, 250Fm and 252No, Comparison with Woods-Saxon cranking calculations.
doi: 10.1103/PhysRevC.82.041301
2010UR03 Phys.Rev. C 82, 064308 (2010) W.Urban, J.A.Pinston, T.Rzaca-Urban, J.Kurpeta, A.G.Smith, I.Ahmad Near-yrast, medium-spin structure of the 109Tc nucleus RADIOACTIVITY 248Cm(SF); measured Eγ, Iγ, γγ-coin, γγ(θ) using EUROGAM2 array. 109Tc; deduced levels, J, π, conversion coefficients, multipolarities, rotational bands. 110Tc, 135,136,137I; measured Eγ. Comparison with level systematics of 103,105,107,109,111Tc. Comparison with quasiparticle-rotor model (QPRM) calculations. Evidence for triaxial nature of 109Tc. NUCLEAR STRUCTURE 107,109Tc; calculated levels, J, π, rotational bands, and γ-ray branching ratios using quasiparticle-rotor model (QPRM).
doi: 10.1103/PhysRevC.82.064308
2010ZH09 Phys.Rev. C 81, 041306 (2010) S.Zhu, M.P.Carpenter, R.V.F.Janssens, S.Frauendorf, I.Ahmad, T.L.Khoo, F.G.Kondev, T.Lauritsen, C.J.Lister, D.Seweryniak Possible double-octupole phonon band in 238U NUCLEAR REACTIONS 238U(207Pb, 207Pb'), E=1400 MeV; measured Eγ, γγ-coin using Gammasphere array, unsafe Coulomb excitation. 238U; deduced levels, J, π, bands, Routhians, double-octupole phonon excitation. Comparison with band structures in 240Pu.
doi: 10.1103/PhysRevC.81.041306
2009AH03 Phys.Rev. C 80, 064315 (2009) Neutron single-particle states above the N=164 subshell in 98251Cf and 96249Cm studied by neutron transfer reactions NUCLEAR REACTIONS 248Cm(α, 3He), E=98.5 MeV; 250Cf(d, p), E=12 MeV; analyzed 3He and proton spectra and σ(θ) from earlier experiments using DWBA. 249Cm, 251Cf; deduced levels, J, π, and configurations; calculated neutron single-particle energies using Woods-Saxon single-particle potential.
doi: 10.1103/PhysRevC.80.064315
2009AL05 Phys.Rev. C 79, 024604 (2009) M.A.Alvi, M.R.Arafah, J.H.Madani, I.Ahmad Microscopic study of neutron elastic scattering from 12C, 40Ca, and 208Pb at intermediate energies NUCLEAR REACTIONS 12C, 40Ca, 208Pb(n, n), E=65-225 MeV; calculated and analyzed differential cross sections using Glauber multiple scattering model. Comparison with experimental data.
doi: 10.1103/PhysRevC.79.024604
2009JI08 Phys.Rev. C 80, 044613 (2009) C.L.Jiang, K.E.Rehm, D.Ackermann, I.Ahmad, J.P.Greene, B.Harss, D.Henderson, W.F.Henning, R.V.F.Janssens, J.Nolen, R.C.Pardo, P.Reiter, J.P.Schiffer, D.Seweryniak, A.Sonzogni, J.Uusitalo, I.Wiedenhover, A.H.Wuosmaa, F.Brumwell, G.McMichael, M.Paul, R.E.Segel Experimental study of the 56Ni(3He, d)57Cu reaction in inverse kinematics NUCLEAR REACTIONS 3He(56Ni, d), E=250 MeV; measured Ed, Id, σ, σ(θ). 57Cu; deduced levels, J, π, spectroscopic factors. DWBA analysis. Discussed implications for 56Ni(p, γ)57Cu reaction of astrophysical interest.
doi: 10.1103/PhysRevC.80.044613
2009KO19 Phys.Rev. C 80, 014304 (2009) F.G.Kondev, G.D.Dracoulis, G.J.Lane, I.Ahmad, A.P.Byrne, M.P.Carpenter, P.Chowdhury, R.V.F.Janssens, T.Kibedi, T.Lauritsen, C.J.Lister, D.Seweryniak, S.K.Tandel, S.Zhu Multi-quasiparticle isomers in 174Lu NUCLEAR REACTIONS Lu, 176Lu(136Xe, X), E ≈ 20% above Coulomb barrier; measured Eγ, Iγ, γγ-coin and half-lives. 174Lu; deduced levels, J, π, isomers, conversion coefficients, multipolarity, transition probabilities, configurations, hindrance factors, rotational bands, band alignments and multi-quasiparticle intrinsic states.
doi: 10.1103/PhysRevC.80.014304
2009QI04 Phys.Rev. C 79, 064319 (2009) J.Qian, A.Heinz, T.L.Khoo, R.V.F.Janssens, D.Peterson, D.Seweryniak, I.Ahmad, M.Asai, B.B.Back, M.P.Carpenter, A.B.Garnsworthy, J.P.Greene, A.A.Hecht, C.L.Jiang, F.G.Kondev, T.Lauritsen, C.J.Lister, A.Robinson, G.Savard, R.Scott, R.Vondrasek, X.Wang, R.Winkler, S.Zhu Spectroscopy of 257Rf NUCLEAR REACTIONS 208Pb(50Ti, n), E=233 MeV; measured Eα, Iα, ce, fission events correlated with evaporation residues, Eγ, Iγ, (ce)α-, (ce)γ-coin, isomer half-lives, (evaporation residues)-ce-α-α correlations. 257Rf; deduced levels, J, π, configurations. 257Rf; calculated excitation energies of 1-qp states and rotational bands built on 1-qp and 3-qp bandheads. A=245-257, odd-A Pu, Cm, Cf, Fm, No, Rf; Nilsson orbital systematics. RADIOACTIVITY 257Rf(α)(EC)(SF), 257mRf(α)(EC), 257Lr(α), 256Rf(SF), 253No(α)(EC); measured Eα, Iα, Eγ, fission events, (ce)α-coin, half-lives, and fission branching ratios. 253No; deduced levels, J, π, α hindrance factors, and configurations.
doi: 10.1103/PhysRevC.79.064319
2009RZ01 Phys.Rev. C 79, 024319 (2009) T.Rzaca-Urban, K.Sieja, W.Urban, F.Nowacki, J.L.Durell, A.G.Smith, I.Ahmad (h11/2, g7/2)9- neutron excitation in 92, 94, 96Sr RADIOACTIVITY 248Cm(SF); measured Eγ, Iγ, γγ-coin, γ(θ), γ(lin pol). 92,94,96Sr; deduced levels, J, π, multipolarity, bands, configurations. Comparison with shell-model calculations.
doi: 10.1103/PhysRevC.79.024319
2009RZ02 Phys.Rev. C 80, 064317 (2009) T.Rzaca-Urban, J.Genevey, T.Materna, W.Urban, A.G.Smith, J.A.Pinston, G.S.Simpson, M.P.Sadowski, U.Koster, H.Faust, A.Bail, L.Mathieu, O.Serot, F.Michel-Sendis, I.Ahmad Near-yrast structure of 142Cs and 144Cs RADIOACTIVITY 248Cm, 252Cf(SF); measured Eγ, Iγ, γγ-coin, γγ(θ), γ(t), and isomer half-lives using EUROGAM2 array. 142,144Cs; deduced levels, J, π, bands, isomers and configurations. Comparison with quasiparticle rotor model (QPRM) calculations. NUCLEAR REACTIONS 235U, 242Am(n, F)137Te/142Cs/144Cs, E=thermal; measured ionic charge distribution of fragments, Eγ, Iγ, ce, γ(ce)-, delayed γ(fragments)-, delayed (ce)(fragments)-coin using LOHENGRIN fragment separator. 142,144Cs; deduced levels and isomer half-lives.
doi: 10.1103/PhysRevC.80.064317
2009SI21 Phys.Rev. C 80, 024304 (2009) G.S.Simpson, W.Urban, J.Genevey, R.Orlandi, J.A.Pinston, A.Scherillo, A.G.Smith, J.F.Smith, I.Ahmad, J.P.Greene Two-quasiparticle isomers and bands of 154, 156Nd and 156, 158, 160Sm NUCLEAR REACTIONS 239Pu(n, X)154Nd, E=thermal; measured Eγ, Iγ, γγ-coin, half-lives. 154Nd; deduced levels, J, π, isomer, bands and configurations. Comparison with QPRM calculations. RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin, half-lives. 156Nd, 156,158,160Sm; deduced levels, J, π, isomers, bands and configurations. Comparison with QPRM calculations.
doi: 10.1103/PhysRevC.80.024304
2009UR02 Phys.Rev. C 79, 044304 (2009) W.Urban, K.Sieja, G.S.Simpson, H.Faust, T.Rzaca-Urban, A.Zlomaniec, M.Lukasiewicz, A.G.Smith, J.L.Durell, J.F.Smith, B.J.Varley, F.Nowacki, I.Ahmad New isomers and medium-spin structure of the 95Y nucleus RADIOACTIVITY 248Cm, 252Cf(SF); measured Eγ, Iγ, γγ-coin, γγ(θ), half-lives. 95Y; deduced levels, J, π, isomers, configurations. Comparisons with shell-model calculations. NUCLEAR REACTIONS 238U(n, F), E=thermal; measured Eγ, Iγ, γγ-coin, half-lives. 95Y; deduced levels, J, π, isomers.
doi: 10.1103/PhysRevC.79.044304
2009UR03 Phys.Rev. C 79, 067301 (2009) W.Urban, J.A.Pinston, T.Rzaca-Urban, E.Wolska, J.Genevey, G.S.Simpson, A.G.Smith, J.L.Durell, B.Varley, I.Ahmad Mapping neutron levels in the A ∼ 100 region: The ν3/2+ [411] band in 103Zr RADIOACTIVITY 248Cm(SF); measured Eγ, Iγ, γγ-coin. 103Zr; deduced levels, J, π, bands. 100,102,104Zr, 142,143,144Ba; measured Eγ. 100,101,102,103,104Zr; deduced mass correlations in fission of 248Cm. 99,101,103Zr; systematics of neutron configurations. Comparison of 103Zr levels with quasiparticle plus rotor model calculations.
doi: 10.1103/PhysRevC.79.067301
2009UR04 Phys.Rev. C 80, 037301 (2009) W.Urban, J.A.Pinston, G.S.Simpson, A.G.Smith, J.F.Smith, T.Rzaca-Urban, I.Ahmad The 11/2-[505] neutron extruder orbital in 159Sm RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ, γγ-coin using Gammasphere array. 159Sm; deduced levels, J, π and half-lives. Systematics of 11/2[505] band in N=87-97 Sm, Gd and Dy nuclei. Comparison with quasiparticle rotor model calculations.
doi: 10.1103/PhysRevC.80.037301
2009WA04 Phys.Rev.Lett. 102, 122501 (2009) X.Wang, R.V.F.Janssens, M.P.Carpenter, S.Zhu, I.Wiedenhover, U.Garg, S.Frauendorf, T.Nakatsukasa, I.Ahmad, A.Bernstein, E.Diffenderfer, S.J.Freeman, J.P.Greene, T.L.Khoo, F.G.Kondev, A.Larabee, T.Lauritsen, C.J.Lister, B.Meredith, D.Seweryniak, C.Teal, P.Wilson Structure of 240Pu: Evidence for Octupole Phonon Condensation? NUCLEAR REACTIONS 240Pu(208Pb, 208Pb'), E=1300 MeV; measured Eγ, Iγ, γγ-coin. 240Pu; deduced levels, J, π.
doi: 10.1103/PhysRevLett.102.122501
2008AH02 Phys.Rev. C 77, 054302 (2008) I.Ahmad, F.G.Kondev, Z.M.Koenig, Wm.C.McHarris, S.W.Yates Two-quasiparticle states in 250Bk studied by decay scheme and transfer reaction spectroscopy NUCLEAR REACTIONS 249Bk(d, p), E=12.0 MeV; measured proton spectra, σ(θ). 250Bk; deduced levels, J, π. RADIOACTIVITY 254Es(α); measured Eα, Iα, Eγ, Iγ, ce, ICC, γα-coin. 250Bk; deduced levels, J, π, hindrance factors, γ-multipolarities, band configurations.
doi: 10.1103/PhysRevC.77.054302
2008KA27 Phys.Rev. C 78, 014301 (2008) K.Katori, I.Ahmad, A.M.Friedman Two-quasineutron states in 24898Cf and 25098Cf and the neutron-neutron residual interactions NUCLEAR REACTIONS 249Cf(d, p), (d, t), E=11, 12, 13, 14 MeV; measured charged particle energies, σ(θ). 248,250Cf; deduced levels, J, π, bands, configurations. Comparison with model calculations.
doi: 10.1103/PhysRevC.78.014301
2008KI05 J.Phys.(London) G35, 014033 (2008) N.Kinoshita, T.Hashimoto, T.Nakanishi, A.Yokoyama, H.Amakawa, T.Mitsugashira, T.Ohtsuki, N.Takahashi, I.Ahmad, J.P.Greene, D.J.Henderson, C.L.Jiang, M.Notani, R.C.Pardo, N.Patel, K.E.Rehm, R.Scott, R.Vondrasek, L.Jisonna, P.Collon, D.Robertson, C.Schmitt, X.D.Tang, Y.Kashiv, H.Nassar, M.Paul Ultra-sensitive detection of p-process nuclide 146Sm produced by (γ, n), (p, 2nε) and (n, 2n) reactions
doi: 10.1088/0954-3899/35/1/014033
2008RO21 Phys.Rev. C 78, 034308 (2008) A.P.Robinson, T.L.Khoo, I.Ahmad, S.K.Tandel, F.G.Kondev, T.Nakatsukasa, D.Seweryniak, M.Asai, B.B.Back, M.P.Carpenter, P.Chowdhury, C.N.Davids, S.Eeckhaudt, J.P.Greene, P.T.Greenlees, S.Gros, A.Heinz, R.-D.Herzberg, R.V.F.Janssens, G.D.Jones, T.Lauritsen, C.J.Lister, D.Peterson, J.Qian, U.S.Tandel, X.Wang, S.Zhu Kπ = 8- isomers and Kπ = 2- octupole vibrations in N = 150 shell-stabilized isotones NUCLEAR REACTIONS 206Pb(48Ca, 2n), E=217 MeV; measured Eγ, Iγ, conversion electron spectra, γγ-, (ce)γ-coin, half-life. 252No; deduced levels, J, π. 244Pu, 248Cf, 250Fm; systematics of 2- and 8- states. RADIOACTIVITY 246Am(β-) [from 244Pu(α, pn), E=42 MeV]; measured Eγ, Iγ, conversion electron spectra, γγ-, (ce)γ-spectra, isomer half-life. 246Cm; deduced levels, J, π.
doi: 10.1103/PhysRevC.78.034308
2008SJ01 Phys.Rev. C 78, 064317 (2008) S.K.L.Sjue, D.Melconian, A.Garcia, I.Ahmad, A.Algora, J.Aysto, V.-V.Elomaa, T.Eronen, J.Hakala, S.Hoedl, A.Kankainen, T.Kessler, I.D.Moore, F.Naab, H.Penttila, S.Rahaman, A.Saastamoinen, H.E.Swanson, C.Weber, S.Triambak, K.Deryckx Electron-capture branch of 100Tc and tests of nuclear wave functions for double-β decays RADIOACTIVITY 100Tc(EC); measured X-ray spectra, Eγ, Iγ; deduced branching ratio, B(GT).
doi: 10.1103/PhysRevC.78.064317
2007AH05 Nucl.Instrum.Methods Phys.Res. A579, 458 (2007) I.Ahmad, F.G.Kondev, J.P.Greene, M.A.Kellett, A.L.Nichols Measurement of the 240Pu half-life RADIOACTIVITY 244Cm, 240Pu(α); measured Eα, Iα and T1/2.
doi: 10.1016/j.nima.2007.04.096
2007GU05 Phys.Rev.Lett. 98, 093001 (2007) J.R.Guest, N.D.Scielzo, I.Ahmad, K.Bailey, J.P.Greene, R.J.Holt, Z.-T.Lu, T.P.O'Connor, D.H.Potterveld Laser Trapping of 225Ra and 226Ra with Repumping by Room-Temperature Blackbody Radiation NUCLEAR MOMENTS 225Ra; measured hfs. Laser trapping.
doi: 10.1103/PhysRevLett.98.093001
2007HA49 J.Nucl.Radiochem.Sci. 8, 109 (2007) T.Hashimoto, T.Nakanishi, A.Yokoyama, H.Amakawa, T.Mitsugashira, T.Ohtsuki, N.Takahashi, I.Ahmad, J.P.Greene, D.J.Henderson, C.L.Jiang, M.Notani, R.C.Pardo, N.Patel, K.E.Rehm, R.Scott, R.Vondrasek, L.Jisonna, P.Collon, D.Robertson, C.Schmitt, X.D.Tang, Y.Kashiv, M.Paul Technological Development for Half-life Measurement of 146Sm Nuclide NUCLEAR REACTIONS 147Sm(γ, n), E < 50 MeV; 147Sm(n, 2n), E=6-10 MeV; 147Sm(p, 2n), E=21 MeV; measured Eα, Iα.
2007KO01 Appl.Radiat.Isot. 65, 335 (2007) F.G.Kondev, I.Ahmad, J.P.Greene, M.A.Kellett, A.L.Nichols Measurements of the half-life of 246Cm and the α-decay emission probabilities of 246Cm and 250Cf RADIOACTIVITY 246Cm, 250Cf(α); measured Eα, Iα, T1/2; deduced α-emission probabilities. Comparison with previous results.
doi: 10.1016/j.apradiso.2006.08.011
2007KU23 Eur.Phys.J. A 33, 307 (2007) J.Kurpeta, W.Urban, Ch.Droste, A.Plochocki, S.G.Rohozinski, T.Rzaca-Urban, T.Morek, L.Prochniak, K.Starosta, J.Aysto, H.Penttila, J.L.Durell, A.G.Smith, G.Lhersonneau, I.Ahmad Low-spin structure of 113Ru and 113Rh RADIOACTIVITY 113Ru, 113Rh(β-) [from 248cm(SF)]; measured Eγ, Iγ, βγ, γγ-coinc. 113Ru, Rh deduced levels, J, π, logft.Compared results to model calculations.
doi: 10.1140/epja/i2006-10464-2
2007LA20 Phys.Rev. C 75, 064309 (2007) T.Lauritsen, R.V.F.Janssens, T.L.Khoo, I.Ahmad, M.P.Carpenter, F.G.Kondev, C.J.Lister, E.F.Moore, D.Seweryniak, S.Zhu, T.Dossing, B.Herskind, A.Korichi, A.Lopez-Martens, R.M.Clark, P.Fallon, G.Lane, A.O.Macchiavelli, D.Ward, A.M.Heinz, D.G.Jenkins, A.J.Larabee, B.Meredith, J.Kozemczak, P.Chowdhury Rotational damping, ridges, and the quasicontinuum of γ rays in 152Dy NUCLEAR REACTIONS 108Pd(48Ca, 4n)152Dy, E=191 MeV; measured Eγ, Iγ, γγ-coinc. Analyzed quasicontinuum and ridge spectra and feeding intensity of the superdeformed bands.
doi: 10.1103/PhysRevC.75.064309
2007PA15 J.Radioanal.Nucl.Chem. 272, 243 (2007) M.Paul, A.Valenta, I.Ahmad, D.Berkovits, C.Bordeanu, S.Ghelberg, Y.Hashimoto, A.Hershkowitz, S.Jiang, T.Nakanishi, K.Sakamoto An upper limit to interstellar 244Pu abundance as deduced from radiochemical search in deep-sea sediment: An account
doi: 10.1007/s10967-007-0508-3
2007RZ01 Phys.Rev. C 75, 054319 (2007) T.Rzaca-Urban, K.Pagowska, W.Urban, A.Zlomaniec, J.Genevey, J.A.Pinston, G.S.Simpson, M.S.Sarkar, S.Sarkar, H.Faust, A.Scherillo, I.Tsekhanovich, R.Orlandi, J.L.Durell, A.G.Smith, I.Ahmad First observation of excited states in the 138I nucleus RADIOACTIVITY 138I [from 248Cm(SF)]; measured prompt and delayed Eγ, Iγ. Deduced level energies, J, π.
doi: 10.1103/PhysRevC.75.054319
2007RZ02 Phys.Rev. C 76, 027302 (2007) T.Rzaca-Urban, W.Urban, J.L.Durell, A.G.Smith, I.Ahmad New excited states in 82Ge: Possible weakening of the N = 50 closed shell RADIOACTIVITY 82Ge(IT)[from 248Cm(SF)]; measured Eγ, Iγ, γγ-coinc. 82Ge deduced levels, J, π.
doi: 10.1103/PhysRevC.76.027302
2007RZ03 Eur.Phys.J. A 32, 5 (2007) T.Rzaca-Urban, W.Urban, M.S.Sarkar, S.Sarkar, J.L.Durell, A.G.Smith, B.J.Varley, I.Ahmad First observation of medium-spin excitations in the 138Cs nucleus RADIOACTIVITY 138Cs(IT) [from 248Cm(SF)]; measured Eγ, Iγ, γγ-coinc. 138Cs deduced levels, J, π.
doi: 10.1140/epja/i2007-10362-1
2007TA34 Phys.Rev.Lett. 99, 052502 (2007) X.D.Tang, K.E.Rehm, I.Ahmad, C.R.Brune, A.Champagne, J.P.Greene, A.A.Hecht, D.Henderson, R.V.F.Janssens, C.L.Jiang, L.Jisonna, D.Kahl, E.F.Moore, M.Notani, R.C.Pardo, N.Patel, M.Paul, G.Savard, J.P.Schiffer, R.E.Segel, S.Sinha, B.Shumard, A.H.Wuosmaa New Determination of the Astrophysical S Factor SE1 of the 12C(α, γ)16O Reaction RADIOACTIVITY 16N(β-), (β-α); measured Eα, Iα, 12Cα-coin. 12C(α, γ); deduced astrophysical S-factor.
doi: 10.1103/PhysRevLett.99.052502
2007UR03 Phys.Rev. C 76, 037301 (2007) W.Urban, T.Rzaca-Urban, A.Syntfeld-Kazuch, J.L.Durell, A.G.Smith, B.J.Varley, I.Ahmad Near-yrast structure of the 149La nucleus RADIOACTIVITY 149La [from 248Cm(SF)]; measured Eγ, Iγ, γγ-coinc. 149La deduced levels, J, π.
doi: 10.1103/PhysRevC.76.037301
2006AH02 Pramana 66, 495 (2006) Diffraction model analysis of pion-12C elastic scattering at 800 MeV/c: Optical potential by inversion NUCLEAR REACTIONS 12C(π+, π+), (π-, π-), E at 800 MeV/c; analyzed σ(θ); deduced model parameters. Diffraction model.
doi: 10.1007/BF02704493
2006AH09 Phys.Scr. T125, 78 (2006) Identification of Nilsson states in transcurium nuclei RADIOACTIVITY 253Es, 255Fm(α); 249Cm(β-); 251Es(EC); measured Eγ, Iγ, γγ-coin. 249Bk, 251Cf deduced single-particle states. Gammasphere array.
doi: 10.1088/0031-8949/2006/T125/017
2006AH10 Phys.Rev.C 74, 065803 (2006) I.Ahmad, J.P.Greene, E.F.Moore, S.Ghelberg, A.Ofan, M.Paul, W.Kutschera Improved measurement of the 44Ti half-life from a 14-year long study RADIOACTIVITY 44Ti(EC) [from 45Sc(p, 2n)]; measured Eγ, Iγ, T1/2.
doi: 10.1103/PhysRevC.74.065803
2006DR07 Phys.Rev.Lett. 97, 122501 (2006) G.D.Dracoulis, F.G.Kondev, G.J.Lane, A.P.Byrne, T.R.McGoram, T.Kibedi, I.Ahmad, M.P.Carpenter, R.V.F.Janssens, T.Lauritsen, C.J.Lister, D.Seweryniak, P.Chowdhury, S.K.Tandel Anomalous Isomeric Decays in 174Lu as a Probe of K Mixing and Interactions in Deformed Nuclei NUCLEAR REACTIONS 175,176Lu, 174Yb(136Xe, X)174Lu, E=6.0 MeV/nucleon; measured prompt and delayed Eγ, Iγ, γγ-coin. 174Lu deduced levels, J, π, configurations, isomer T1/2, K-mixing. Gammasphere array.
doi: 10.1103/PhysRevLett.97.122501
2006NA02 Phys.Rev.Lett. 96, 041102 (2006) H.Nassar, M.Paul, I.Ahmad, Y.Ben-Dov, J.Caggiano, S.Ghelberg, S.Goriely, J.P.Greene, M.Hass, A.Heger, A.Heinz, D.J.Henderson, R.V.F.Janssens, C.L.Jiang, Y.Kashiv, B.S.Nara Singh, A.Ofan, R.C.Pardo, T.Pennington, K.E.Rehm, G.Savard, R.Scott, R.Vondrasek 40Ca(α, γ)44Ti Reaction in the Energy Regime of Supernova Nucleosynthesis NUCLEAR REACTIONS 4He(40Ca, γ), E(cm) ≈ 0.6-1.2 MeV/nucleon; measured yield. 40Ca(α, γ), E=low; deduced astrophysical reaction rate. Accelerator mass spectrometry.
doi: 10.1103/PhysRevLett.96.041102
2006OR05 Phys.Rev. C 73, 054310 (2006) R.Orlandi, A.G.Smith, D.Patel, G.S.Simpson, R.M.Wall, J.F.Smith, O.J.Onakanmi, I.Ahmad, J.P.Greene, M.P.Carpenter, T.Lauritsen, C.J.Lister, R.V.F.Janssens, F.G.Kondev, D.Seweryniak, B.J.P.Gall, O.Dorveaux, A.E.Stuchbery Single-particle and collective degrees of freedom in 101Zr and 103, 105Mo RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ(θ, H), γγ-coin. 101Zr, 103,105Mo levels deduced δ, g-factors, quadrupole moments, configurations. Gammasphere array, time-integrated perturbed angular correlation, rigid triaxial rotor-plus-particle calculations.
doi: 10.1103/PhysRevC.73.054310
2006PE17 Phys.Rev. C 74, 014316 (2006) D.Peterson, B.B.Back, R.V.F.Janssens, T.L.Khoo, C.J.Lister, D.Seweryniak, I.Ahmad, M.P.Carpenter, C.N.Davids, A.A.Hecht, C.L.Jiang, T.Lauritsen, X.Wang, S.Zhu, F.G.Kondev, A.Heinz, J.Qian, R.Winkler, P.Chowdhury, S.K.Tandel, U.S.Tandel Decay modes of 250No RADIOACTIVITY 250No(SF) [from 204Pb(48Ca, 2n)]; measured T1/2 for ground and isomeric state decay; deduced upper limit for α-decay branching ratio. 219,220Th(α) [from 176Yb(48Ca, xn)]; measured T1/2.
doi: 10.1103/PhysRevC.74.014316
2006PI14 Phys.Rev.C 74, 064304 (2006) J.A.Pinston, W.Urban, Ch.Droste, T.Rzaca-Urban, J.Genevey, G.Simpson, J.L.Durell, A.G.Smith, B.J.Varley, I.Ahmad Triaxiality in 105Mo and 107Mo from the low to intermediate spin region RADIOACTIVITY 248Cm(SF); measured Eγ, Iγ, γγ-coin. 105Mo deduced levels, J, π, rotational bands, configurations, triaxial deformation. Eurogam2 array. NUCLEAR REACTIONS 241Pu(n, F), E=thermal; measured prompt and delayed Eγ, Iγ. 107Mo deduced levels, isomer T1/2, branching ratios, triaxial deformation.
doi: 10.1103/PhysRevC.74.064304
2006TA13 Phys.Rev. C 73, 044306 (2006) S.K.Tandel, P.Chowdhury, E.H.Seabury, I.Ahmad, M.P.Carpenter, S.M.Fischer, R.V.F.Janssens, T.L.Khoo, T.Lauritsen, C.J.Lister, D.Seweryniak, Y.R.Shimizu High-K isomers and rotational structures in 174W NUCLEAR REACTIONS 128Te(50Ti, 4n), E=215, 225 MeV; measured prompt and delayed Eγ, Iγ, γγ-coin. 174W deduced high-spin levels, J, π, configurations, high-K isomeric states T1/2. Gammasphere array, comparison with cranked mean-field model predictions.
doi: 10.1103/PhysRevC.73.044306
2006TA19 Phys.Rev.Lett. 97, 082502 (2006) S.K.Tandel, T.L.Khoo, D.Seweryniak, G.Mukherjee, I.Ahmad, B.Back, R.Blinstrup, M.P.Carpenter, J.Chapman, P.Chowdhury, C.N.Davids, A.A.Hecht, A.Heinz, P.Ikin, R.V.F.Janssens, F.G.Kondev, T.Lauritsen, C.J.Lister, E.F.Moore, D.Peterson, P.Reiter, U.S.Tandel, X.Wang, S.Zhu K Isomers in 254No: Probing Single-Particle Energies and Pairing Strengths in the Heaviest Nuclei NUCLEAR REACTIONS 208Pb(48Ca, 2n), E=217 MeV; measured delayed Eγ, Iγ, E(ce), I(ce), (ce)γ-coin, X-ray spectra. 254No deduced levels, J, π, isomeric states T1/2, configurations, deformation. Mass separator, recoil-decay tagging.
doi: 10.1103/PhysRevLett.97.082502
2006UR01 Phys.Rev. C 73, 037302 (2006) W.Urban, Ch.Droste, T.Rzaca-Urban, A.Zlomaniec, J.L.Durell, A.G.Smith, B.J.Varley, I.Ahmad Near-yrast structure of the 109Mo nucleus RADIOACTIVITY 248Cm(SF); measured Eγ, Iγ, γγ-coin. 109Mo deduced levels, J, π, configurations. Eurogam2 array.
doi: 10.1103/PhysRevC.73.037302
2006UR02 Eur.Phys.J. A 27, 257 (2006) W.Urban, M.Saha-Sarkar, S.Sarkar, T.Rzaca-Urban, J.L.Durell, A.G.Smith, J.A.Genevey, J.A.Pinston, G.S.Simpson, I.Ahmad New information on the T1/2 = 47 s isomer in the 136I nucleus RADIOACTIVITY 248Cm(SF); measured Eγ, Iγ, γγ-coin. 136I deduced levels, J, π, ICC, configurations. Eurogam2 array.
doi: 10.1140/epja/i2005-10273-1
2005AH02 Phys.Rev. C 71, 024311 (2005) I.Ahmad, J.C.Banar, J.A.Becker, T.A.Bredeweg, J.R.Cooper, D.S.Gemmell, A.Kraemer, A.Mashayekhi, D.P.McNabb, G.G.Miller, E.F.Moore, P.Palmer, L.N.Pangault, R.S.Rundberg, J.P.Schiffer, S.D.Shastri, T.-F.Wang, J.B.Wilhelmy Search for x-ray induced decay of the 31-yr isomer of 178Hf using synchrotron radiation NUCLEAR REACTIONS 178mHf(X-ray, X), E=8-30 keV; measured prompt and delayed Eγ, X-ray spectra; deduced σ upper limit for induced isomer decay. Comparison with previous results.
doi: 10.1103/PhysRevC.71.024311
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