NSR Query Results
Output year order : Descending NSR database version of April 11, 2024. Search: Author = E.Kwan Found 64 matches. 2024TA07 Phys.Rev.Lett. 132, 072501 (2024) O.B.Tarasov, A.Gade, K.Fukushima, M.Hausmann, E.Kwan, M.Portillo, M.Smith, D.S.Ahn, D.Bazin, R.Chyzh, S.Giraud, K.Haak, T.Kubo, D.J.Morrissey, P.N.Ostroumov, I.Richardson, B.M.Sherrill, A.Stolz, S.Watters, D.Weisshaar, T.Zhang Observation of New Isotopes in the Fragmentation of 198Pt at FRIB NUCLEAR REACTIONS C(198Pt, X)182Tm/183Tm/186Yb/187Yb/190Lu, E=186 MeV/nucleon; measured reaction products, TOF; deduced new isotopes, yields. The Facility for Rare Isotope Beams (FRIB) using the Advanced Rare Isotope Separator (ARIS).
doi: 10.1103/PhysRevLett.132.072501
2023HA31 Phys.Rev. C 108, 034608 (2023) K.Haak, O.B.Tarasov, P.Chowdhury, A.M.Rogers, K.Sharma, T.Baumann, D.Bazin, P.C.Bender, J.Chen, A.Estrade, M.A.Famiano, D.C.Foulds-Holt, N.Fukuda, A.Gade, T.N.Ginter, R.W.Gohier, M.Hausmann, A.M.Hill, D.E.M.Hoff, L.Klankowski, E.Kwan, J.Li, S.N.Liddick, B.Longfellow, S.Lyons, C.Morse, M.Portillo, D.Rhodes, A.L.Richard, S.Samaranayake, B.M.Sherrill, M.K.Smith, M.Spieker, C.S.Sumithrarachchi, H.Suzuki, K.Wang, S.Waniganeththi, D.Weisshaar, S.Zhu Production and discovery of neutron-rich isotopes by fragmentation of 198Pt NUCLEAR REACTIONS 9Be, Ni(198Pt, X)182Yb/183Lu/184Lu/185Lu/186Lu/187Lu/188Lu/189Lu/184Hf/185Hf/186Hf/187Hf/188Hf/189Hf/190Hf/191Hf/192Hf/185Ta/186Ta/187Ta/188Ta/189Ta/190Ta/191Ta/192Ta/193Ta/186W/187W/188W/189W/190W/191W/192W/193W/194W/187Re/188Re/189Re/190Re/191Re/192Re/193Re/194Re/195Re/196Re/190Os/191Os/192Os/193Os/194Os/195Os/196Os/197Os/192Ir/193Ir/194Ir/195Ir/196Ir/197Ir/198Ir, E=85 MeV/nucleon from the NSCL-MSU Coupled Cyclotron Facility (CCF); measured reaction products, particle identification spectra using A1900 fragment separator, S800 spectrograph for fragment analysis, PIN diode telescope of five silicon detectors for particle detection, γ rays using GRETINA array, and LISE+ Monte Carlo calculations of charge state fractions; deduced production cross sections of about 70 nuclei in Z=70-77 region. 189Lu, 191,192Hf; deduced new nuclides. 190W; measured γ-ray spectrum from the emission of a 166-μs isomer. Comparison of measured production cross sections with theoretical calculations using EFAX3 and COFRA codes. Numerical values of production cross sections are listed in the Supplemental Material.
doi: 10.1103/PhysRevC.108.034608
2021GA15 Phys.Rev.Lett. 126, 152701 (2021) B.Gao, S.Giraud, K.A.Li, A.Sieverding, R.G.T.Zegers, X.Tang, J.Ash, Y.Ayyad-Limonge, D.Bazin, S.Biswas, B.A.Brown, J.Chen, M.DeNudt, P.Farris, J.M.Gabler, A.Gade, T.Ginter, M.Grinder, A.Heger, C.Hultquist, A.M.Hill, H.Iwasaki, E.Kwan, J.Li, B.Longfellow, C.Maher, F.Ndayisabye, S.Noji, J.Pereira, C.Qi, J.Rebenstock, A.Revel, D.Rhodes, A.Sanchez, J.Schmitt, C.Sumithrarachchi, B.H.Sun, D.Weisshaar New 59Fe Stellar Decay Rate with Implications for the 60Fe Radioactivity in Massive Stars NUCLEAR REACTIONS 59Co(t, 3He)59Fe, E=115 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced γ-ray energies, J, π, σ(θ), B(GT), β-decay rates. Comparison with stellar evolution calculations.
doi: 10.1103/PhysRevLett.126.152701
2021GO10 Phys.Rev. C 103, 035803 (2021) J.Gombas, P.A.DeYoung, A.Spyrou, A.C.Dombos, A.Algora, T.Baumann, B.Crider, J.Engel, T.Ginter, E.Kwan, S.N.Liddick, S.Lyons, F.Naqvi, E.M.Ney, J.Pereira, C.Prokop, W.Ong, S.Quinn, D.P.Scriven, A.Simon, C.Sumithrarachchi β-decay feeding intensity distributions for 103, 104mNb RADIOACTIVITY 103,104mNb(β-)[from 9Be(124Sn, X), E not given, followed by separation of fragments using A1900 separator at NSCL-MSU]; measured reaction products and particle identification plot from 9Be(124Sn, X), Eγ, Iγ, total absorption gamma spectra from the decays of 103Nb and 104mNb using Summing NaI(Tl) (SuN) detector at the NSCL-MSU; deduced Iβ feedings to levels in 103Mo and 104Mo, cumulative B(GT) values. Comparison to predictions of quasiparticle random-phase approximation (QRPA) model. Relevance to antineutrino studies of nuclear reactors, and astrophysical r process.
doi: 10.1103/PhysRevC.103.035803
2020CI04 Phys.Rev. C 101, 034305 (2020) A.A.Ciemny, W.Dominik, T.Ginter, R.Grzywacz, Z.Janas, M.Kuich, C.Mazzocchi, M.Pfutzner, M.Pomorski, D.Bazin, T.Baumann, A.Bezbakh, B.P.Crider, M.Cwiok, S.Go, G.Kaminski, K.Kolos, A.Korgul, E.Kwan, S.Liddick, K.Miernik, S.V.Paulauskas, J.Pereira, T.Roginski, K.Rykaczewski, C.Sumithrarachchi, Y.Xiao, H.Schatz, P.Sarriguren First identification of 58Zn β-delayed proton emission RADIOACTIVITY 57,58Zn(β+), (β+p)[from 9Be(78Kr, X), followed by separation of fragments using A1900 separator]; measured reaction products, Ep, Ip, β-delayed proton branching ratio, half-life of 57Zn decay using the Warsaw Optical Time Projection Chamber (OTPC) with energy loss and time-of-flight method for particle identification at the NSCL-MSU facility. 58Cu; deduced levels, J, π, β+p branching ratios, B(GT) for 1+ states. Comparison with experimental B(GT) values from 58Ni(3He, t)58Cu reaction, and with QRPA calculations.
doi: 10.1103/PhysRevC.101.034305
2019DO02 Phys.Rev. C 99, 015802 (2019) A.C.Dombos, A.Spyrou, F.Naqvi, S.J.Quinn, S.N.Liddick, A.Algora, T.Baumann, J.Brett, B.P.Crider, P.A.DeYoung, T.Ginter, J.Gombas, E.Kwan, S.Lyons, W.-J.Ong, A.Palmisano, J.Pereira, C.J.Prokop, D.P.Scriven, A.Simon, M.K.Smith, C.S.Sumithrarachchi β-decay half-lives of neutron-rich nuclides in the A=100--110 mass region RADIOACTIVITY 99Y, 101,102Zr, 102m,103,104mNb, 109Tc(β-)[from 9Be(124Sn, X), E=120 MeV/nucleon, followed by separation of reaction products using A1900 fragment separator]; measured (implants)γ-coin, time-of-flight, total energy loss of fragments, and half-lives from (implants)γ-correlated decay curves using the implantation station installed inside the Summing NaI(Tl) (SuN) detector for the total absorption spectroscopy (TAS) technique at the NSCL-MSU facility. Comparison with previous experimental values; compiled measured and evaluated half-lives in literature for the seven isotopes studied in this work. Relevance to B(GT) distributions, nuclear astrophysics, nuclear structure, and nuclear technology.
doi: 10.1103/PhysRevC.99.015802
2019TI09 Phys.Rev. C 100, 045805 (2019) R.Titus, E.M.Ney, R.G.T.Zegers, D.Bazin, J.Belarge, P.C.Bender, B.A.Brown, C.M.Campbell, B.Elman, J.Engel, A.Gade, B.Gao, E.Kwan, S.Lipschutz, B.Longfellow, E.Lunderberg, T.Mijatovic, S.Noji, J.Pereira, J.Schmitt, C.Sullivan, D.Weisshaar, J.C.Zamora Constraints for stellar electron-capture rates on 86Kr via the 86Kr(t, 3He+γ)86Br reaction and the implications for core-collapse supernovae NUCLEAR REACTIONS 86Kr, 12C, 14N(t, 3He), E=115 MeV/nucleon, [tritons from 9Be(16O, X), E=150 MeV/nucleon primary reaction, and separated using A1900 fragment separator]; measured 3He spectra, Eγ, Iγ, γγ- and (3He)γ-coin, differential σ(θ) using S800 spectrograph for particles and GRETINA array for γ detection at the NSCL-MSU facility. Data from 12C 14N present as contaminants used for energy calibration. 86Br; deduced levels, L-transfers, Gamow-Teller strength distributions. 86Kr; calculated electron capture rates at T=10 GK using the deduced Gamow-Teller strength distributions. Comparison with shell-model and quasiparticle random-phase approximation (QRPA) calculations. Z=26-41, N=75-93; calculated electron capture rates for 78 nuclides near N=50 and Z=28 (see 2018Ti02) using quasiparticle random-phase approximation (QRPA), with Jπ assignments made for ground states of some nuclides using Gallagher-Moszkowski (GM) rule. Relevance to astrophysical simulations of core-collapse supernovae.
doi: 10.1103/PhysRevC.100.045805
2018HE14 Phys.Rev.Lett. 121, 082502 (2018) J.Henderson, C.Y.Wu, J.Ash, P.C.Bender, B.Elman, A.Gade, M.Grinder, H.Iwasaki, E.Kwan, B.Longfellow, T.Mijatovic, D.Rhodes, M.Spieker, D.Weisshaar Localizing the Shape Transition in Neutron-Deficient Selenium NUCLEAR REACTIONS 208Pb(72Se, 72Se'), E=4 MeV/nucleon; measured reaction products, Eγ, Iγ. 72Se; deduced spectroscopic quadrupole moments, lack of low-spin shape change in neutron-deficient selenium.
doi: 10.1103/PhysRevLett.121.082502
2017CL01 Phys.Rev. C 95, 064612 (2017) S.D.Clarke, B.M.Wieger, A.Enqvist, R.Vogt, J.Randrup, R.C.Haight, H.Y.Lee, B.A.Perdue, E.Kwan, C.Y.Wu, R.A.Henderson, S.A.Pozzi Measurement of the energy and multiplicity distributions of neutrons from the photofission of 235U NUCLEAR REACTIONS 235U(γ, F), E<800 MeV white photon source; measured E(n), I(n), neutron time-of-flight spectrum, prompt fission neutron spectrum, neutron multiplicity distribution, average energy of correlated photofission neutron pairs as function of the angle between detectors at the WNR-15L beam line at LANSCE-LANL. Comparison with simulations using FREYA and MCNPX-POLIMI codes.
doi: 10.1103/PhysRevC.95.064612
2017MI06 Phys.Lett. B 769, 339 (2017) K.Miki, R.G.T.Zegers, Sam M.Austin, D.Bazin, B.A.Brown, A.C.Dombos, R.K.Grzywacz, M.N.Harakeh, E.Kwan, S.N.Liddick, S.Lipschutz, E.Litvinova, M.Madurga, M.T.Mustonen, W.J.Ong, S.V.Paulauskas, G.Perdikakis, J.Pereira, W.A.Peters, C.Robin, M.Scott, A.Spyrou, C.Sullivan, R.Titus Isovector excitations in 100Nb and their decays by neutron emission studied via the 100Mo(t, 3He + n) reaction at 115 MeV/ u NUCLEAR REACTIONS 100Mo(t, 3He), E=115 MeV/nucleon; measured reaction products; deduced σ(θ, E), Gamow-Teller transition strength. Comparison with the single-particle estimate and spherical pn-(R)QRPA and pn-RQTBA calculations.
doi: 10.1016/j.physletb.2017.04.004
2017SC07 Phys.Rev.Lett. 118, 172501 (2017) M.Scott, R.G.Zegers, R.Almus, S.M.Austin, D.Bazin, B.A.Brown, C.Campbell, A.Gade, M.Bowry, S.Galies, U.Garg, M.N.Harakeh, E.Kwan, C.Langer, C.Loelius, S.Lipschutz, E.Litvinova, E.Lunderberg, C.Morse, S.Noji, G.Perdikakis, T.Redpath, C.Robin, H.Sakai, Y.Sasamoto, M.Sasano, C.Sullivan, J.A.ostevin, T.Uesaka, D.Weisshaar Observation of the Isovector Giant Monopole Resonance via the 28Si(10Be, 10B*[1.74 MeV]) Reaction at 100 A MeV NUCLEAR REACTIONS 28Si(10Be, 10B'), E=100 MeV/nucleon; measured reaction products, Eγ, Iγ. 28Al, 10B; deduced σ(θ, E), σ(θ), isobaric analog state in 10B, excitation-energy spectrum in 28Al, monopole and dipole contributions and the isovector giant dipole resonance and isovector giant monopole resonance (IVGMR). Comparison with theoretical calculations.
doi: 10.1103/PhysRevLett.118.172501
2017TO16 Phys.Lett. B 773, 20 (2017) A.P.Tonchev, N.Tsoneva, C.Bhatia, C.W.Arnold, S.Goriely, S.L.Hammond, J.H.Kelley, E.Kwan, H.Lenske, J.Piekarewicz, R.Raut, G.Rusev, T.Shizuma, W.Tornow Pygmy and core polarization dipole modes in 206Pb: Connecting nuclear structure to stellar nucleosynthesis NUCLEAR REACTIONS 208Pb(γ, γ'), E=4.9-8.1 MeV; analyzed available data; deduced a range for the neutron-skin thickness of and a corresponding range for the slope of the symmetry energy, Maxwellian-averaged radiative σ.
doi: 10.1016/j.physletb.2017.07.062
2016CI01 Eur.Phys.J. A 52, 89 (2016) A.A.Ciemny, W.Dominik, T.Ginter, R.Grzywacz, Z.Janas, M.Kuich, C.Mazzocchi, K.Miernik, M.Pfutzner, M.Pomorski, D.Bazin, T.Baumann, A.Bezbakh, B.P.Crider, M.Cwiok, S.Go, G.Kaminski, K.Kolos, A.Korgul, E.Kwan, S.N.Liddick, S.V.Paulauskas, J.Pereira, K.P.Rykaczewski, C.Sumithrarachchi, Y.Xiao First measurement of 60Ge β-decay RADIOACTIVITY 60Ge(β+)[from 78Kr+9Be fragmentation at 150 MeV/nucleon]; measured reaction products using OTPC (Optical Time Projection Chamber) plus GEM (Gas Electron Multiplier) for each βp decay event; deduced T1/2. Compared with Moeller measurement and with calculations using three different mass formulae.
doi: 10.1140/epja/i2016-16089-x
2016GU02 Phys.Rev.Lett. 116, 012501 (2016) K.Gulyuz, G.Bollen, M.Brodeur, R.A.Bryce, K.Cooper, M.Eibach, C.Izzo, E.Kwan, K.Manukyan, D.J.Morrissey, O.Naviliat-Cuncic, M.Redshaw, R.Ringle, R.Sandler, S.Schwarz, C.S.Sumithrarachchi, A.A.Valverde, A.C.C.Villari High Precision Determination of the β Decay QEC Value of 11C and Implications on the Tests of the Standard Model ATOMIC MASSES 11C, 10,11B; measured TOF ion cyclotron resonance spectra; deduced mass excess values. Comparison with AME2012 evaluation.
doi: 10.1103/PhysRevLett.116.012501
2015BE02 Phys.Lett. B 741, 128 (2015) J.Beller, C.Stumpf, M.Scheck, N.Pietralla, D.Deleanu, D.M.Filipescu, T.Glodariu, W.Haxton, A.Idini, J.H.Kelley, E.Kwan, G.Martinez-Pinedo, R.Raut, C.Romig, R.Roth, G.Rusev, D.Savran, A.P.Tonchev, W.Tornow, J.Wagner, H.R.Weller, N.-V.Zamfir, M.Zweidinger Separation of the 1+/1- parity doublet in 20Ne NUCLEAR REACTIONS 20Ne, 28Si(polarized γ, γ'), E=11.26 MeV; measured reaction products, Eγ, Iγ; deduced the energy difference of the parity doublet, the ratio of their integrated σ. Comparison with shell model calculations.
doi: 10.1016/j.physletb.2014.12.018
2015CI06 Phys.Rev. C 92, 014622 (2015) A.A.Ciemny, W.Dominik, T.Ginter, R.Grzywacz, Z.Janas, M.Kuich, C.Mazzocchi, M.Pfutzner, M.Pomorski, F.Zarzynski, D.Bazin, T.Baumann, A.Bezbakh, B.P.Crider, M.Cwiok, S.Go, G.Kaminski, K.Kolos, A.Korgul, E.Kwan, S.Liddick, K.Miernik, S.V.Paulauskas, J.Pereira, K.Rykaczewski, C.Sumithrarachchi, Y.Xiao First observation of 59Ge NUCLEAR REACTIONS 9Be(78Kr, X)59Ge/60Ge/61Ge/62Ge, E=150 MeV/nucleon; measured production cross sections using A1900 separator and Optical Time Projection Chamber (OTPC) at NSCL-MSU facility; deduced new 59Ge isotope. Comparison with EPAX3 theoretical calculations. Relevance to 2p radioactivity.
doi: 10.1103/PhysRevC.92.014622
2014CH30 Phys.Rev. C 90, 014602 (2014) A.Chyzh, C.Y.Wu, E.Kwan, R.A.Henderson, T.A.Bredeweg, R.C.Haight, A.C.Hayes-Sterbenz, H.Y.Lee, J.M.O'Donnell, J.L.Ullmann Total prompt γ-ray emission in fission of 235U, 239, 241Pu, and 252Cf NUCLEAR REACTIONS 235U, 239,241Pu(n, F), E=0.025 eV-100 keV; measured Eγ, Iγ of prompt γ rays, fission fragments using DANCE detector array for γ rays and parallel-plate avalanche counter for fission fragments at LLNL facility; deduced γ-ray multiplicity distributions, mean values of the total prompt γ-ray energy. Discussed γ heating in nuclear reactors. Comparison with previous experimental results and ENDF/B-VII.1 evaluation. RADIOACTIVITY 252Cf(SF); measured Eγ, Iγ of prompt γ rays, fission fragments using DANCE detector array for γ rays and parallel-plate avalanche counter for fission fragments at LLNL facility; deduced γ-ray multiplicity distributions, mean values of the total prompt γ-ray energy. Comparison with previous experimental results.
doi: 10.1103/PhysRevC.90.014602
2014HA27 Nucl.Data Sheets 119, 205 (2014) R.C.Haight, H.Y.Lee, T.N.Taddeucci, J.M.O'Donnell, B.A.Perdue, N.Fotiades, M.Devlin, J.L.Ullmann, A.Laptev, T.Bredeweg, M.Jandel, R.O.Nelson, S.A.Wender, M.C.White, C.Y.Wu, E.Kwan, A.Chyzh, R.Henderson, J.Gostic The Prompt Fission Neutron Spectrum (PFNS) Measurement Program at LANSCE
doi: 10.1016/j.nds.2014.08.057
2014KW03 Phys.Lett. B 732, 210 (2014) E.Kwan, C.Y.Wu, N.C.Summers, G.Hackman, T.E.Drake, C.Andreoiu, R.Ashley, G.C.Ball, P.C.Bender, A.J.Boston, H.C.Boston, A.Chester, A.Close, D.Cline, D.S.Cross, R.Dunlop, A.Finlay, A.B.Garnsworthy, A.B.Hayes, A.T.Laffoley, T.Nano, P.Navratil, C.J.Pearson, J.Pore, S.Quaglioni, C.E.Svensson, K.Starosta, I.J.Thompson, P.Voss, S.J.Williams, Z.M.Wang Precision measurement of the electromagnetic dipole strengths in 11Be NUCLEAR REACTIONS 196Pt(11Be, 11Be'), E=1.73, 2.09 MeV/nucleon;measured reaction products, Eγ, Iγ. 11Be; deduced yields, B(E1). Comparison with FRESCO code calculations.
doi: 10.1016/j.physletb.2014.03.049
2014KW05 Nucl.Data Sheets 119, 221 (2014) E.Kwan, C.Y.Wu, R.C.Haight, H.Y.Lee, T.A.Bredeweg, A.Chyzh, M.Devlin, N.Fotiades, J.M.Gostic, R.A.Henderson, M.Jandel, A.Laptev, R.O.Nelson, J.M.O'Donnell, B.A.Perdue, T.N.Taddeucci, J.L.Ullmann, S.A.Wender Prompt Fission γ-rays Measured Using Liquid Scintillators NUCLEAR REACTIONS 235U(n, F), E=1-20 MeV; measured prompt Eγ, Iγ, γγ-coin using FIGARO; deduced γ-ray spectrum, unfolded using SVD and iterative Bayesian techniques. Compared to 235Cf(SF). RADIOACTIVITY 235Cf(SF); measured prompt Eγ, Iγ, γγ-coin using FIGARO; deduced γ-ray spectrum, unfolded using SVD and iterative Bayesian techniques. Compared to 235U(n, F).
doi: 10.1016/j.nds.2014.08.061
2014MO04 Phys.Rev. C 89, 034610 (2014) S.Mosby, T.A.Bredeweg, A.Chyzh, A.Couture, R.Henderson, M.Jandel, E.Kwan, J.M.O'Donnell, J.Ullmann, C.Y.Wu Improved neutron capture cross section of 239Pu NUCLEAR REACTIONS 239Pu(n, γ), E=10-1000 eV; measured Eγ, Iγ, (fission fragment)γ-coin, time-of-flight spectrum, fission σ(E), ratio of capture to fission σ(E), α-particle derived capture σ(E), integrated σ using DANCE detector and a parallel-plate avalanche counter (PPAC) at LANSCE-LLNL facility. Comparison with theoretical calculations, ENDF/B-VII.1 evaluation, and with previous experimental data.
doi: 10.1103/PhysRevC.89.034610
2014MO21 Nucl.Data Sheets 119, 31 (2014) S.Mosby, C.Arnold, T.A.Bredeweg, A.Chyzh, A.Couture, R.Henderson, M.Jandel, E.Kwan, J.M.O'Donnell, G.Rusev, J.L.Ullmann, C.Y.Wu Neutron Capture Cross Section of 239Pu NUCLEAR REACTIONS 239Pu(n, γ), E=10 eV - 100 keV; measured prompt fission Eγ, Iγ using DANCE; deduced σ. Preliminary. Compared to ENDF/B-VII.1.
doi: 10.1016/j.nds.2014.08.010
2014PE14 Nucl.Data Sheets 119, 371 (2014) B.A.Perdue, T.N.Taddeucci, R.C.Haight, T.Bredeweg, M.Devlin, N.Fotiades, M.Jandel, A.Laptev, H.Y.Lee, R.O.Nelson, J.M.O'Donnell, J.L.Ullmann, S.A.Wender, C.Y.Wu, E.Kwan, A.Chyzh, R.A.Henderson, J.M.Gostic Development of an Array of Liquid Scintillators to Measure the Prompt Fission Neutron Spectrum at LANSCE
doi: 10.1016/j.nds.2014.08.102
2014SA20 Phys.Rev. C 89, 035803 (2014) A.Sauerwein, K.Sonnabend, M.Fritzsche, J.Glorius, E.Kwan, N.Pietralla, C.Romig, G.Rusev, D.Savran, L.Schnorrenberger, A.P.Tonchev, W.Tornow, H.R.Weller Determination of the 142Ce(γ, n) cross section using quasi-monoenergetic Compton backscattered γ rays NUCLEAR REACTIONS 142Ce(polarized γ, n), E=7.6=9.7 MeV; measured Eγ, Iγ, σ(E) at HIγS-TUNL facility. Activation method. Comparison with Hauser-Feshbach calculations using different γ-ray strength functions, and with predictions of Hartree-Fock-BCS model. Relevance to s-process branching at 141Ce, and elemental abundance.
doi: 10.1103/PhysRevC.89.035803
2013CH15 Phys.Rev. C 87, 034620 (2013) A.Chyzh, C.Y.Wu, E.Kwan, R.A.Henderson, J.M.Gostic, T.A.Bredeweg, A.Couture, R.C.Haight, A.C.Hayes-Sterbenz, M.Jandel, H.Y.Lee, J.M.O'Donnell, J.L.Ullmann Systematics of prompt γ-ray emission in fission NUCLEAR REACTIONS 235U, 239,241Pu(n, F), E=thermal to 1 MeV; measured prompt Eγ, Iγ, charged particles, (particle)γ(t), γ multiplicity, total γ-ray energy vs cluster multiplicity, TOF using DANCE array and PPACs at LANSCE facility. Possible population of pygmy resonances. Comparison of measured γ-ray multiplicity distributions with iterative Bayesian and SVD methods.
doi: 10.1103/PhysRevC.87.034620
2013CH48 Phys.Rev. C 88, 044607 (2013) A.Chyzh, C.Y.Wu, E.Kwan, R.A.Henderson, J.M.Gostic, T.A.Bredeweg, A.Couture, R.C.Haight, H.Y.Lee, J.M.O'Donnell, J.L.Ullmann Precision measurement of the 238Pu (n, γ) cross section NUCLEAR REACTIONS 238Pu(n, γ), E=thermal-30 keV; measured Eγ, Iγ, summed-γ spectra, γ-ray multiplicity, precise σ(E) using DANCE array at LANSCE facility; deduced resonance parameters, energies, γ and neutron widths from 2.87 eV to 407 eV energy region. Comparison with evaluated data in ENDF/B-VII.1.
doi: 10.1103/PhysRevC.88.044607
2013GA23 Nature 497, 199 (2013) L.P.Gaffney, P.A.Butler, M.Scheck, A.B.Hayes, F.Wenander, M.Albers, B.Bastin, C.Bauer, A.Blazhev, S.Bonig, N.Bree, J.Cederkall, T.Chupp, D.Cline, T.E.Cocolios, T.Davinson, H.De Witte, J.Diriken, T.Grahn, A.Herzan, M.Huyse, D.G.Jenkins, D.T.Joss, N.Kesteloot, J.Konki, M.Kowalczyk, Th.Kroll, E.Kwan, R.Lutter, K.Moschner, P.Napiorkowski, J.Pakarinen, M.Pfeiffer, D.Radeck, P.Reiter, K.Reynders, S.V.Rigby, L.M.Robledo, M.Rudigier, S.Sambi, M.Seidlitz, B.Siebeck, T.Stora, P.Thoele, P.Van Duppen, M.J.Vermeulen, M.von Schmid, D.Voulot, N.Warr, K.Wimmer, K.Wrzosek-Lipska, C.Y.Wu, M.Zielinska Studies of pear-shaped nuclei using accelerated radioactive beams NUCLEAR REACTIONS 60Ni, 112,114Cd, 120Sn(220Rn, 220Rn'), (224Ra, 224Ra'), E=2.82, 2.83 MeV/nucleon; [220Rn and 224Ra secondary beams from U(p, X), E=1.4 GeV primary reaction]; measured Eγ, Iγ, γγ-, (particle)γγ-, (particle)(particle)γ-coin using Miniball array and DSSSDs at REX-EBIS-ISOLDE-CERN facility. 220Rn, 224Ra; deduced levels, J, π, γ-branching ratios, electromagnetic matrix elements, B(E1), B(E2), B(E3), Q1, Q2, Q3, octupole collectivity and deformation. Discussed electric dipole moment (EDM). Coulomb excitation data analyzed using GOSIA computer code. Comparison with self-consistent mean-field theory, and cluster model calculations. Systematics of Q1, Q2 and Q3 for 218,220,222,224,226Rn, 220,222,224,226,228Ra.
doi: 10.1038/nature12073
2013GO19 Phys.Rev. C 88, 064308 (2013) P.M.Goddard, N.Cooper, V.Werner, G.Rusev, P.D.Stevenson, A.Rios, C.Bernards, A.Chakraborty, B.P.Crider, J.Glorius, R.S.Ilieva, J.H.Kelley, E.Kwan, E.E.Peters, N.Pietralla, R.Raut, C.Romig, D.Savran, L.Schnorrenberger, M.K.Smith, K.Sonnabend, A.P.Tonchev, W.Tornow, S.W.Yates Dipole response of 76Se above 4 MeV NUCLEAR REACTIONS 76Se(polarized γ, γ'), E=4-9 MeV; measured Eγ, Iγ, γ(θ), integrated σ, γ(linear polarization) at HIγS facility at TUNL. 76Se; deduced levels, J, π, Γ, level half-lives, B(E1), B(M1), branching ratios. Comparison with theoretical calculations.
doi: 10.1103/PhysRevC.88.064308
2013RO28 Phys.Rev. C 88, 044331 (2013) C.Romig, J.Beller, J.Glorius, J.Isaak, J.H.Kelley, E.Kwan, N.Pietralla, V.Yu.Ponomarev, A.Sauerwein, D.Savran, M.Scheck, L.Schnorrenberger, K.Sonnabend, A.P.Tonchev, W.Tornow, H.R.Weller, A.Zilges, M.Zweidinger Low-lying dipole strength of the open-shell nucleus 94Mo NUCLEAR REACTIONS 94Mo(γ, γ'), (polarized γ, γ'), E=5.47, 6.05, 6.44, 6.61, 6.89, 7.65, 8.70 MeV; measured Eγ, Iγ, γγ(θ), γ-polarization asymmetry using DHIPS setup at S-DALINAC, and HiγS at TUNL and DFELL facilities. 94Mo; deduced levels, J, π, Γ20/Γ, branching ratios, B(E1), B(M1), E1 strength distributions, feeding of first 2+ level, elastic σ. Comparison with QPM calculations, and statistical model using DICEBOX computer code.
doi: 10.1103/PhysRevC.88.044331
2013RU01 Phys.Rev.Lett. 110, 022503 (2013) G.Rusev, N.Tsoneva, F.Donau, S.Frauendorf, R.Schwengner, A.P.Tonchev, A.S.Adekola, S.L.Hammond, J.H.Kelley, E.Kwan, H.Lenske, W.Tornow, A.Wagner Fine Structure of the Giant M1 Resonance in 90Zr NUCLEAR REACTIONS 90Zr(γ, γ'), E=7-11 MeV; measured reaction products, Eγ, Iγ; deduced dipole excitations, 1+ states, fine structure of the giant M1 resonance, B(M1). Comparison with three-phonon QPM calculations.
doi: 10.1103/PhysRevLett.110.022503
2013SC03 Phys.Rev. C 87, 024306 (2013) R.Schwengner, R.Massarczyk, G.Rusev, N.Tsoneva, D.Bemmerer, R.Beyer, R.Hannaske, A.R.Junghans, J.H.Kelley, E.Kwan, H.Lenske, M.Marta, R.Raut, K.D.Schilling, A.Tonchev, W.Tornow, A.Wagner Pygmy dipole strength in 86Kr and systematics of N=50 isotones NUCLEAR REACTIONS 86Kr(γ, γ'), (polarized γ, γ'), E<11.2 MeV; measured Eγ, Iγ, γγ(θ), widths, azimuthal asymmetry, integrated σ. ELBE accelerator facility at HZDR, and HIγS facility at TUNL. 86Kr; deduced levels, PDR, J, π, branching ratios, photoabsorption σ(E), energy-weighted sums of photoabsorption σ. Comparison of photoabsorption σ with that from (γ, n) reaction. NUCLEAR STRUCTURE 86Kr, 88Sr, 90Zr, 92Mo; calculated neutron skin thickness, B(E1), proton and neutron transition densities using QRPA calculations. Comparison with shell-model calculations.
doi: 10.1103/PhysRevC.87.024306
2013SC08 Phys.Rev. C 87, 051304 (2013) M.Scheck, V.Yu.Ponomarev, T.Aumann, J.Beller, M.Fritzsche, J.Isaak, J.H.Kelley, E.Kwan, N.Pietralla, R.Raut, C.Romig, G.Rusev, D.Savran, K.Sonnabend, A.P.Tonchev, W.Tornow, H.R.Weller, M.Zweidinger Decay pattern of the pygmy dipole resonance in 60Ni NUCLEAR REACTIONS 60Ni(polarized γ, γ'), E=7.65-9.66 MeV; measured Eγ, Iγ, M1 and E1 strengths at HIγS-TUNL facility. 60Ni; deduced levels, J, π, PDR, branching ratios, number of 1+ and 1- states. Comparison with quasiparticle phonon model (QPM) calculations.
doi: 10.1103/PhysRevC.87.051304
2013SC20 Phys.Rev. C 88, 044304 (2013) M.Scheck, V.Yu.Ponomarev, M.Fritzsche, J.Joubert, T.Aumann, J.Beller, J.Isaak, J.H.Kelley, E.Kwan, N.Pietralla, R.Raut, C.Romig, G.Rusev, D.Savran, L.Schorrenberger, K.Sonnabend, A.P.Tonchev, W.Tornow, H.R.Weller, A.Zilges, M.Zweidinger Photoresponse of 60Ni below 10-MeV excitation energy: Evolution of dipole resonances in fp-shell nuclei near N=Z NUCLEAR REACTIONS 60Ni(γ, γ'), (polarized γ, γ'), E<10 MeV; 58Ni(polarized γ, γ'), E<10 MeV; measured Eγ, Iγ, γγ(θ), γ-ray polarization, integrated σ, γ-branching ratios using High-intensity photon setup at S-DALINAC facility. 58,60Ni; deduced levels, J, π, width, level half-lives, B(E1), B(M1), B(E2), E1 and M1 strength distributions. Thomas-Reiche-Kuhn sum rule. Pygmy-dipole resonances. Comparison with QPM calculations.
doi: 10.1103/PhysRevC.88.044304
2013UL01 Phys.Rev. C 87, 044607 (2013) J.L.Ullmann, E.M.Bond, T.A.Bredeweg, A.Couture, R.C.Haight, M.Jandel, T.Kawano, H.Y.Lee, J.M.O'Donnell, A.C.Hayes, I.Stetcu, T.N.Taddeucci, P.Talou, D.J.Vieira, J.B.Wilhelmy, J.A.Becker, A.Chyzh, J.Gostic, R.Henderson, E.Kwan, C.Y.Wu Prompt γ-ray production in neutron-induced fission of 239Pu NUCLEAR REACTIONS 239Pu(n, F), E<30 keV; measured prompt Eγ, Iγ, fission σ(E), Gamma-ray multiplicity using DANCE γ-ray calorimeter at LANSCE facility; deduced average multiplicity, average total energy. GEANT4 simulation of DANCE detector. Fission Tagging. Comparison with Monte Carlo Hauser-Feshbach (MCHF) calculations, previous experimental studies, and with ENDF/B-VII.
doi: 10.1103/PhysRevC.87.044607
2012AN13 Phys.Rev. C 86, 051302 (2012); Erratum Phys.Rev. C 91, 039901 (2015) C.T.Angell, S.L.Hammond, H.J.Karwowski, J.H.Kelley, M.Krticka, E.Kwan, A.Makinaga, G.Rusev Evidence for radiative coupling of the pygmy dipole resonance to excited states NUCLEAR REACTIONS 142Nd(γ, n), E=9.86-13.3 MeV; 142Nd(polarized γ, γ'), E=4.2-9.7 MeV; measured Eγ, Iγ, branching ratio, σ(E) using High Intensity γ-ray Source (HIγS) at TUNL for (γ, γ'), and quasimonoenergetic γ-ray source at Tsukuba; deduced two distinct PDR peaks. Comparison with statistical-model calculations. Violation of Brink hypothesis.
doi: 10.1103/PhysRevC.86.051302
2012BE39 J.Phys.:Conf.Ser. 366, 012003 (2012) J.Beller, J.Wagner, M.Ahmed, D.Deleanu, D.M.Filipescu, T.Glodariu, J.Isaak, J.H.Kelley, E.Kwan, N.Pietralla, R.Raut, C.Romig, G.Rusev, M.Scheck, S.C.Stave, A.Tonchev, W.Tornow, H.R.Weller, N.-V.Zamfir, M.Zweidinger Energy separation of the 1+/1- parity doublet in 20Ne NUCLEAR REACTIONS 28Si, 20Ne(polarized γ, γ'), E=11.26 MeV; measured reaction products, Eγ, Iγ. 20Ne; deduced integrated σ, energy separation, J, π of parity doublet states, effective nuclear enhancement factor.
doi: 10.1088/1742-6596/366/1/012003
2012CH07 Phys.Rev. C 85, 021601 (2012) A.Chyzh, C.Y.Wu, E.Kwan, R.A.Henderson, J.M.Gostic, T.A.Bredeweg, R.C.Haight, A.C.Hayes-Sterbenz, M.Jandel, J.M.O'Donnell, J.L.Ullmann Evidence for the stochastic aspect of prompt γ emission in spontaneous fission RADIOACTIVITY 252Cf(SF); measured prompt γ spectra, and γ-ray multiplicity distributions, total γ-ray energy distribution using 4π γ-ray calorimeter DANCE array at LANSCE facility. Data analyzed by iterative Bayesian and SVD methods. Stochastic features of the prompt γ emission in spontaneous fission at higher multiplicities.
doi: 10.1103/PhysRevC.85.021601
2012EN05 Phys.Rev. C 86, 064605 (2012) A.Enqvist, B.M.Wieger, L.Huang, M.Flaska, S.A.Pozzi, R.C.Haight, H.Y.Lee, E.Kwan, C.Y.Wu Neutron-induced 235U fission spectrum measurements using liquid organic scintillation detectors NUCLEAR REACTIONS 235U(n, F), E=0.5-10 MeV; measured neutron and γ TOF spectra, neutron fission spectra, average emitted neutron energy at LANSCE facility. Monte-Carlo simulations. Watt-spectra fits. Comparison with previous experimental studies.
doi: 10.1103/PhysRevC.86.064605
2012HA12 Phys.Rev. C 85, 044302 (2012) S.L.Hammond, A.S.Adekola, C.T.Angell, H.J.Karwowski, E.Kwan, G.Rusev, A.P.Tonchev, W.Tornow, C.R.Howell, J.H.Kelley Dipole response of 238U to polarized photons below the neutron separation energy NUCLEAR REACTIONS 238U(polarized γ, γ'), E=2.0-6.2 MeV; measured Eγ, Iγ, γ(θ), γ(linear pol), integrated cross sections using HIγS facility at TUNL. 238U; deduced levels, J, π, multipolarity, widths, branching ratios, B(M1), B(E1), total γ-ray interaction cross section for E1. Systematics of E1 and M1 strengths for 232Th, 236,238U. Comparison with QRPA calculations.
doi: 10.1103/PhysRevC.85.044302
2012KE01 Nucl.Phys. A880, 88 (2012) J.H.Kelley, E.Kwan, J.E.Purcell, C.G.Sheu, H.R.Weller Energy levels of light nuclei A=11 COMPILATION 11He, 11Li, 11Be, 11B, 11C, 11N; compiled, evaluated levels, J, π, mass, resonances, resonance T1/2, decay modes, γ transitions, Q, quadrupole moment, μ. Comparison with older evaluations.
doi: 10.1016/j.nuclphysa.2012.01.010
2012KW01 Nucl.Instrum.Methods Phys.Res. A688, 55 (2012) E.Kwan, C.Y.Wu, R.C.Haight, H.Y.Lee, T.A.Bredeweg, A.Chyzh, M.Devlin, N.Fotiades, J.M.Gostic, R.A.Henderson, M.Jandel, A.Laptev, R.O.Nelson, J.M.O'Donnell, B.A.Perdue, T.N.Taddeucci, J.L.Ullmann, S.A.Wender Prompt energy distribution of 235U(n, f)γ at bombarding energies of 1-20 MeV NUCLEAR REACTIONS 235U(n, F), E=1-20 MeV; measured reaction products, Eγ, Iγ; deduced prompt γ-rays distribution. Comparison with GEANT4 simulations. RADIOACTIVITY 252Cf(SF); measured decay products, Eγ, Iγ; deduced prompt γ-rays distribution. Comparison with GEANT4 simulations.
doi: 10.1016/j.nima.2012.06.003
2012KW02 Phys.Rev. C 86, 014612 (2012) E.Kwan, D.J.Morrissey, D.A.Davies, M.Steiner, C.S.Sumithrarachchi, L.Weissman Systematic studies of light neutron-rich nuclei produced via the fragmentation of 40Ar NUCLEAR REACTIONS 9Be, Ni, 181Ta(40Ar, X)10Be/11Be/12Be/12B/13B/14B/15B/14C/15C/16C/17C/18C/19C/16N/17N/18N/19N/20N/21N/22N/19O/20O/21O/22O/23O/24O/21F/22F/23F/24F/25F/26F/27F/24Ne/25Ne/26Ne/27Ne/28Ne/29Ne/30Ne/26Na/27Na/28Na/29Na/30Na/31Na/32Na/33Na/28Mg/29Mg/30Mg/31Mg/32Mg/33Mg/34Mg/35Mg/31Al/32Al/33Al/34Al/35Al/36Al/33Si/34Si/35Si/36Si/37Si/38Si/35P/36P/37P/38P, E=140 MeV/nucleon; measured fission fragment spectra by energy loss from time-of-flight measurements, average isobaric velocities, parallel momentum transfers, widths, fragment σ. Comparison with empirical formula EPAX, and predictions from internuclear cascade and deep inelastic models using Monte Carlo ISABEL-GEMINI and DIT-GEMINI computer codes.
doi: 10.1103/PhysRevC.86.014612
2012MA31 Phys.Rev. C 86, 014319 (2012) R.Massarczyk, R.Schwengner, F.Donau, E.Litvinova, G.Rusev, R.Beyer, R.Hannaske, A.R.Junghans, M.Kempe, J.H.Kelley, T.Kogler, K.Kosev, E.Kwan, M.Marta, A.Matic, C.Nair, R.Raut, K.D.Schilling, G.Schramm, D.Stach, A.P.Tonchev, W.Tornow, E.Trompler, A.Wagner, D.Yakorev Electromagnetic dipole strength of 136Ba below the neutron separation energy NUCLEAR REACTIONS 136Ba(γ, γ'), E at 7.0 MeV/c and 11.4 MeV/c; 136Ba(polarized γ, γ')E=4.7, 5.1, 5.6, 6.1, 6.5, 7.0, 7.5, 8.0, 8.4, 8.7, 9.0, 9.3 MeV; measured Eγ, Iγ, integrated σ(E), photoabsorption σ as a function of excitation energy, γ(θ), γ(lin pol) using Bremsstrahlung facility at ELBE, HZDR, and HIγS facility at TUNL. 136Ba; deduced levels, J, π, widths, pygmy dipole resonances, dipole strength in the quasicontinuum, enhancement of dipole strength. Statistical code used to simulate inelastic transitions and to determine the branching ratios of transitions to ground state. GEANT4 simulations. Comparison with previous experimental studies, and with theoretical calculations using quasiparticle random-phase approximation (QRPA) and relativistic quasiparticle time blocking approximation (RQTBA) approaches. Comparison of photoabsorption σ in 136,138Ba and 139La targets.
doi: 10.1103/PhysRevC.86.014319
2011AD02 Phys.Rev. C 83, 034615 (2011) A.S.Adekola, C.T.Angell, S.L.Hammond, A.Hill, C.R.Howell, H.J.Karwowski, J.H.Kelley, E.Kwan Discovery of low-lying E1 and M1 strengths in 232Th NUCLEAR REACTIONS 232Th(γ, γ'), E=2-4 MeV; measured Eγ, Iγ, γγ(θ), integrated σ using HIγS facility; deduced widths. 232Th; deduced levels, J, π, multipolarity, B(M1), B(E1), branching ratios. Comparison of scissors mode summed B(M1) strengths with those in 232Th, 235,236,238U, and with predictions of quasiparticle random-phase approximation (QRPA).
doi: 10.1103/PhysRevC.83.034615
2011IS01 Phys.Rev. C 83, 034304 (2011) J.Isaak, D.Savran, M.Fritzsche, D.Galaviz, T.Hartmann, S.Kamerdzhiev, J.H.Kelley, E.Kwan, N.Pietralla, C.Romig, G.Rusev, K.Sonnabend, A.P.Tonchev, W.Tornow, A.Zilges Investigation of low-lying electric dipole strength in the semimagic nucleus 44Ca NUCLEAR REACTIONS 44Ca(polarized γ, γ'), E = 6-10, 9.9 MeV; measured Eγ, Iγ, γ(θ), integrated cross sections, and polarization asymmetry at DHIPS facility using S-DALINAC accelerator, and at HIγS facility. 44Ca; deduced levels, J, π, photon branching ratios, widths, B(E1) and B(M1) transition strengths. Comparisons with dipole strengths in 40,48Ca and with microscopic calculations within the extended theory of finite Fermi systems. Dependence of total E1 strength on neutron number.
doi: 10.1103/PhysRevC.83.034304
2011KW01 Phys.Rev. C 83, 041601 (2011) E.Kwan, G.Rusev, A.S.Adekola, F.Donau, S.L.Hammond, C.R.Howell, H.J.Karwowski, J.H.Kelley, R.S.Pedroni, R.Raut, A.P.Tonchev, W.Tornow Discrete deexcitations in 235U below 3 MeV from nuclear resonance fluorescence NUCLEAR REACTIONS 235U(γ, γ'), E=1.6-3.0 MeV; measured Eγ, Iγ, γγ-coin, integrated cross sections, and widths using HIγS facility. 235U; deduced levels, J, π, branching ratios. Comparison with quasiparticle random-phase approximation in deformed basis for dipole transitions.
doi: 10.1103/PhysRevC.83.041601
2011RA08 Phys.Rev. C 83, 044621 (2011) R.Raut, A.S.Crowell, B.Fallin, C.R.Howell, C.Huibregtse, J.H.Kelley, T.Kawano, E.Kwan, G.Rusev, A.P.Tonchev, W.Tornow, D.J.Vieira, J.B.Wilhelmy Cross-section measurements of neutron-induced reactions on GaAs using monoenergetic beams from 7.5 to 15 MeV NUCLEAR REACTIONS 69Ga(n, 2n)68Ga, 69Ga(n, p)69mZn, 71Ga(n, p)71mZn, 75As(n, 2n)74As, 75As(n, p)75Ge, E=7.5, 8.0, 8.5, 9.5, 10.2, 11.0, 11.5, 12.5, 13.25, 14.0, 14.5, 15.0 MeV; measured Eγ, Iγ; deduced half-lives and σ. 27Al(n, α)24Na, 197Au(n, 2n)196Au, E=7.5-14.5 MeV; measured σ and used as monitor reactions. Comparison of measured cross sections with previous data and statistical model calculations based on the Hauser-Feshbach formalism, using the TALYS and the COH3 codes.
doi: 10.1103/PhysRevC.83.044621
2011RU15 J.Phys.:Conf.Ser. 312, 092053 (2011) G.Rusev, A.S.Adekola, F.Donau, S.Frauendorf, S.L.Hammond, C.Huibregtse, J.H.Kelley, E.Kwan, R.Schwengner, A.P.Tonchev, W.Tornow, A.Wagner Fine structure of the giant M1 resonance in 90Zr NUCLEAR REACTIONS 90Zr(polarized γ, γ'), E=7-11 MeV; measured Eγ, Iγ(θ) using HPGe; deduced B(M1) fine structure; calculated B(M1) fine structure using shell model and QRPA.
doi: 10.1088/1742-6596/312/9/092053
2011TO17 J.Phys.:Conf.Ser. 312, 092058 (2011) A.P.Tonchev, S.L.Hammond, J.H.Kelley, E.Kwan, H.Lenske, R.Raut, G.Rusev, W.Tornow, N.Tsoneva Coarse and Fine Structure of the Pygmy Dipole Resonance NUCLEAR REACTIONS 138Ba(polarized γ, γ), (polarized γ, γ'), E=5.4, 7.2, 8.5 MeV; measured Eγ, Iγ(θ) using HPGe with nuclear resonance fluorescence; deduced σ, M1, E1 asymmetry, GDR, PDR photoabsorption σ, E1 ground-state γ transition strength, resonant-shape; calculated E1, M1 γ transition strength distribution using QPM.
doi: 10.1088/1742-6596/312/9/092058
2010PU04 Nucl.Phys. A848, 1 (2010) J.E.Purcell, J.H.Kelley, E.Kwan, C.G.Sheu, H.R.Weller Energy levels of light nuclei A=3 COMPILATION 3n, 3H, 3He, 3Li; compiled evaluated nuclear structure data.
doi: 10.1016/j.nuclphysa.2010.08.012
2010SU03 Phys.Rev. C 81, 014302 (2010) C.S.Sumithrarachchi, D.J.Morrissey, A.D.Davies, D.A.Davies, M.Facina, E.Kwan, P.F.Mantica, M.Portillo, Y.Shimbara, J.Stoker, R.R.Weerasiri States in 22O via β decay of 22N RADIOACTIVITY 22N(β-), (β-n), (β-2n)[from Be(48Ca, X), E=140 MeV/nucleon]; measured Eγ, Iγ, Eβ, Iβ, Eν, Iν, βγ-coin, half-lives, branching ratios; deduced logft. 20,21,22O; deduced levels, J, π, B(GT) values. Comparison with shell model calculations. Discussed halo structure and shell closure.
doi: 10.1103/PhysRevC.81.014302
2010TO01 Phys.Rev.Lett. 104, 072501 (2010) A.P.Tonchev, S.L.Hammond, J.H.Kelley, E.Kwan, H.Lenske, G.Rusev, W.Tornow, N.Tsoneva Spectral Structure of the Pygmy Dipole Resonance NUCLEAR REACTIONS 138Ba(γ, γ), (γ, γ'), E ≈ below one-neutron separation energy; measured Eγ, Iγ; deduced σ, energy levels, B(E1), B(M1). Comparison with QPM calculations.
doi: 10.1103/PhysRevLett.104.072501
2010TO09 Phys.Rev. C 82, 054620 (2010) A.P.Tonchev, S.L.Hammond, C.R.Howell, C.Huibregtse, A.Hutcheson, J.H.Kelley, E.Kwan, R.Raut, G.Rusev, W.Tornow, T.Kawano, D.J.Vieira, J.B.Wilhelmy Measurement of the 241Am(γ, n)240Am reaction in the giant dipole resonance region NUCLEAR REACTIONS 241Am(γ, n), E=9.0-15.6 MeV; measured Eγ, Iγ, σ using HIγS facility. Giant dipole resonance region. Comparison with previous measurements and statistical nuclear-model calculations.
doi: 10.1103/PhysRevC.82.054620
2009HU09 Phys.Rev. C 80, 014603 (2009) A.Hutcheson, C.Angell, J.A.Becker, A.S.Crowell, D.Dashdorj, B.Fallin, N.Fotiades, C.R.Howell, H.J.Karwowski, T.Kawano, J.H.Kelley, E.Kwan, R.A.Macri, R.O.Nelson, R.S.Pedroni, A.P.Tonchev, W.Tornow Cross sections for 238U(n, n'γ) and 238U(n, 2nγ) reactions at incident neutron energies between 5 and 14 MeV NUCLEAR REACTIONS 238U(n, n'γ), (n, 2nγ), E=5-14 MeV; measured Eγ, yields, σ and excitation functions. Comparison with existing data and calculations using the GNASH and TALYS Hauser-Feshbach statistical-model codes.
doi: 10.1103/PhysRevC.80.014603
2009SA12 Phys.Rev.Lett. 102, 132501 (2009) J.Savory, P.Schury, C.Bachelet, M.Block, G.Bollen, M.Facina, C.M.Folden III, C.Guenaut, E.Kwan, A.A.Kwiatkowski, D.J.Morrissey, G.K.Pang, A.Prinke, R.Ringle, H.Schatz, S.Schwarz, C.S.Sumithrarachchi rp Process and Masses of N ∼ Z ∼ 34 Nuclides ATOMIC MASSES 68,70Se, 70,71Br; measured frequencies using penning trap; deduced masses. 70,71Kr predicted masses.
doi: 10.1103/PhysRevLett.102.132501
2007BO50 Eur.Phys.J. Special Topics 150, 337 (2007) G.Bollen, C.Bachelet, M.Block, D.A.Davies, M.Facina, C.M.Folden, C.Guenaut, J.Huikari, E.Kwan, A.Kwiatowski, D.J.Morrissey, G.Pang, A.Prinke, R.Ringle, J.Savory, P.Schury, S.Schwarz, C.Sumithrarachchi, T.Sun Penning trap mass measurements of rare isotopes produced by projectile fragmentation with LEBIT at NSCL ATOMIC MASSES 80As, 81Se; measured masses a penning trap mass spectrometer.
doi: 10.1140/epjst/e2007-00340-3
2007RI08 Phys.Rev. C 75, 055503 (2007) R.Ringle, T.Sun, G.Bollen, D.Davies, M.Facina, J.Huikari, E.Kwan, D.J.Morrissey, A.Prinke, J.Savory, P.Schury, S.Schwarz, C.S.Sumithrarachchi High-precision Penning trap mass measurements of 37, 38Ca and their contributions to conserved vector current and isobaric mass multiplet equation ATOMIC MASSES 37,38Ca; measured masses using penning trap mass spectrometer. Deduced mass excess and implications on CVC and IMME.
doi: 10.1103/PhysRevC.75.055503
2007SC24 Phys.Rev. C 75, 055801 (2007); Erratum Phys.Rev. C 80, 029905 (2009) P.Schury, C.Bachelet, M.Block, G.Bollen, D.A.Davies, M.Facina, C.M.Folden III, C.Guenaut, J.Huikari, E.Kwan, A.Kwiatkowski, D.J.Morrissey, R.Ringle, G.K.Pang, A.Prinke, J.Savory, H.Schatz, S.Schwarz, C.S.Sumithrarachchi, T.Sun Precision mass measurements of rare isotopes near N = Z = 33 produced by fast beam fragmentation ATOMIC MASSES 63,64Ga, 64,65,66Ge, 66,67,68As, 69Se; measured masses using penning trap mass spectrometer. Astrophysical implications discussed.
doi: 10.1103/PhysRevC.75.055801
2007SU05 Phys.Rev. C 75, 024305 (2007) C.S.Sumithrarachchi, D.J.Morrissey, B.A.Brown, A.D.Davies, D.A.Davies, M.Fancina, E.Kwan, P.F.Mantica, M.Portillo, Y.Shimbara, J.Stoker, R.R.Weerasiri Structure of 23F via β decay of 23O RADIOACTIVITY 23O, 21N, 24F, 26Ne(β-) [from Be(48Ca, X)]; measured Eγ, Iγ, βγ-coin, T1/2. 23O(β-n); measured β-delayed neutron spectra; deduced neutron emission probability. 23F, 26Na deduced levels, J, π, β-feeding intensities.
doi: 10.1103/PhysRevC.75.024305
2006BO11 Phys.Rev.Lett. 96, 152501 (2006) G.Bollen, D.Davies, M.Facina, J.Huikari, E.Kwan, P.A.Lofy, D.J.Morrissey, A.Prinke, R.Ringle, J.Savory, P.Schury, S.Schwarz, C.Sumithrarachchi, T.Sun, L.Weissman Experiments with Thermalized Rare Isotope Beams from Projectile Fragmentation: A Precision Mass Measurement of the Superallowed β Emitter 38Ca ATOMIC MASSES 38Ca; measured mass. Penning trap mass spectrometer.
doi: 10.1103/PhysRevLett.96.152501
2006RI15 Int.J. Mass Spectrom. 251, 300 (2006) R.Ringle, P.Schury, T.Sun, G.Bollen, D.Davies, J.Huikari, E.Kwan, D.J.Morrissey, A.Prinke, J.Savory, S.Schwarz, C.Sumithrarachchi Precision mass measurements with LEBIT at MSU ATOMIC MASSES 78,80,82,83,84Kr; measured masses using the LEBIT Penning trap mass spectrometer. Comparison with 2003 mass evaluation.
doi: 10.1016/j.ijms.2006.02.011
2005ST29 Phys.Lett. B 627, 32 (2005) A.Stolz, T.Baumann, N.H.Frank, T.N.Ginter, G.W.Hitt, E.Kwan, M.Mocko, W.Peters, A.Schiller, C.S.Sumithrarachchi, M.Thoennessen First observation of 60Ge and 64Se NUCLEAR REACTIONS 9Be(78Kr, X)60Ge/61Ge/62Ge/63Ge/64Ge/64Se/65Se/66Se/67Se/68Se, E=140 MeV/nucleon; measured production σ, isotopic yields; deduced no evidence for 59Ga, 63As. 60Ge, 64Se deduced T1/2 lower limits. 59Ga, 63As deduced T1/2 upper limits.
doi: 10.1016/j.physletb.2005.08.130
2005ST34 Eur.Phys.J. A 25, Supplement 1, 335 (2005) A.Stolz, T.Baumann, N.H.Frank, T.N.Ginter, G.W.Hitt, E.Kwan, M.Mocko, W.Peters, A.Schiller, C.S.Sumithrarachchi, M.Thoennessen Discovery of 60Ge and 64Se NUCLEAR REACTIONS 9Be(78Kr, X)60Ge/61Ge/62Ge/63Ge/64Ge/64Se/65Se/66Se/67Se/68Se, E=140 MeV/nucleon; measured production σ, isotopic yields; deduced no evidence for 59Ga, 63As.
doi: 10.1140/epjad/i2005-06-192-y
2004ST28 Nucl.Phys. A746, 54c (2004) A.Stolz, A.Estrade, A.D.Davies, T.N.Ginter, P.T.Hosmer, E.Kwan, S.N.Liddick, P.F.Mantica, T.J.Mertzimekis, F.A.Montes, D.J.Morrissey, A.C.Morton, M.Ouellette, E.Pellegrini, P.Santi, H.Schatz, M.Steiner, A.E.Stuchbery, B.E.Tomlin, W.B.Walters, A.Woehr, O.Arndt, K.-L.Kratz, B.Pfeiffer, P.Reeder Radioactive ion beams in the region of 100Sn and 78Ni at the NSCL NUCLEAR REACTIONS Be, Ni, Nb(124Xe, X), E=140 MeV/nucleon; measured fragments isotopic yields, prompt and delayed (particle)γ-coin. Be(86Kr, X), E=140 MeV/nucleon; measured fragments isotopic yields; deduced evidence for 78Ni.
doi: 10.1016/j.nuclphysa.2004.09.017
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