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Search: Author = C.Qi

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2023AH06      Eur.Phys.J. A 59, 306 (2023)

I.Ahmed, R.Kumar, K.Hadynska-Klek, C.Qi

Shell-model studies relevant for the low-energy Coulomb excitation in Zn isotopes

NUCLEAR STRUCTURE 62,64,66,68,70Zn; calculated energy levels, J, π, B(E2) with the KSHELL code using JUN45 and jj44b interactions.

doi: 10.1140/epja/s10050-023-01213-2
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2023AM06      Phys.Rev. C 108, 054311 (2023)

M.B.Amaro, D.Karlsson, C.Qi

Multilinear analysis of the systematics of proton radioactivity

doi: 10.1103/PhysRevC.108.054311
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2023CE04      Eur.Phys.J. A 59, 300 (2023)

E.A.Cederlof, T.Back, J.Nyberg, C.Qi, A.Atac, H.Badran, T.Braunroth, T.Calverley, D.M.Cox, M.Doncel, T.Grahn, P.Greenlees, J.Hilton, R.Julin, S.Juutinen, J.Konki, H.Li, S.Matta, V.Modamio, B.S.Nara Singh, J.Pakarinen, P.Papadakis, J.Partanen, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, S.Stolze, P.Subramaniam, J.Uusitalo, J.J.Valiente-Dobon

Lifetime measurement of the yrast 2+ state in 118Te

NUCLEAR REACTIONS 100Mo(22Ne, 4n), E=75 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies, J, π, level T1/2, B(E2). Comparison with systematics, LSSM calculations. A Recoil Distance Doppler-shift (RDDS) experiment with the DPUNS plunger at the JYFL accelerator laboratory, the JUROGAM II γ-ray spectrometer.

doi: 10.1140/epja/s10050-023-01212-3
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2023ZH03      Phys.Rev. C 107, 014308 (2023)

W.Zhang, B.Cederwall, M.Doncel, O.Aktas, A.Ertoprak, C.Qi, T.Grahn, B.S.Nara Singh, D.M.Cullen, D.Hodge, M.Giles, S.Stolze, K.Auranen, H.Badran, T.Braunroth, T.Calverley, D.M.Cox, Y.D.Fang, P.T.Greenlees, J.Hilton, E.Ideguchi, R.Julin, S.Juutinen, M.Kumar Raju, M.Leino, H.Li, H.Liu, S.Matta, P.Subramaniam, V.Modamio, J.Pakarinen, P.Papadakis, J.Partanen, C.M.Petrache, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, J.Sorri, M.J.Taylor, J.Uusitalo, J.J.Valiente-Dobon

Decay spectroscopy of 171, 172Os and 171, 172, 174Ir

NUCLEAR REACTIONS 92Mo(83Kr, X)171/172Os/171/172/174Ir, E=383 MeV; measured reaction products, recoils, Eα , Iα, Eγ, Iγ, γγ-coin, (recoil)αγ-coin. 171,172Os, 171,172,174Ir; deduced levels, J, π, δ. Newly identified α-decay branch from the bandhead (isomeric state) of the νi13/2 band in 171Os with competition between α, β, and electromagnetic decays. RITU gas-filled ion separator, GREAT spectrometer and JUROGAM II HPGe array at K130 cyclotron (JYFL).

RADIOACTIVITY 171,171m,172Os, 171m,172,172m,174,174mIr(α);171mOs(IT)[from 92Mo(83Kr, X), E=383 MeV]; measured Eα, Iα, Eγ, Iγ, x-rays, αγ-coin; deduced T1/2, branching ratios, Q values, formation probabilities, hindrance factor, reduced widths. 167,168W, 167,168,170; deduced levels, J, π, transitions. 180Hg, 176Pt, 172Os, 168W; calculated total Routhian surface, potential energy surface. Discussed the correlation between α-decay hindrance factor and shape changes. Reaction products implanted into two adjacently mounted double-sided silicon strip detectors (DSSDs) used tp measure α, while γ-rays were detected by double sided planar HPGe. Beam from K10 cyclotron (JYFL).

doi: 10.1103/PhysRevC.107.014308
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2023ZH05      Phys.Lett. B 838, 137740 (2023)

Z.Zhang, C.Yuan, C.Qi, B.Cai, X.Xu

Extended R-matrix description of two-proton radioactivity

RADIOACTIVITY 19Mg, 45Fe, 48Ni, 54Zn, 67Kr, 96Sn, 92Cd, 88Pd, 84Ru, 80Mo, 74Zr, 71Sr, 63Se, 59Ge, 42Cr, 38,39Ti, 18Mg(2p); analyzed available data; deduced decay width formulae for different 2p emission mechanisms, including sequential 2p decay, diproton decay, and tri-body decay from the extended R-matrix theory.

RADIOACTIVITY 19Mg, 45Fe, 48Ni, 54Zn, 67Kr, 96Sn, 92Cd, 88Pd, 84Ru, 80Mo, 74Zr, 71Sr, 63Se, 59Ge, 42Cr, 38,39Ti, 18Mg(2p); analyzed available data; deduced decay width formulae for different 2p emission mechanisms, including sequential 2p decay, diproton decay, and tri-body decay rom the extended R-matrix theory.

doi: 10.1016/j.physletb.2023.137740
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2022DA06      Phys.Rev. C 105, L031304 (2022)

B.Das, B.Cederwall, C.Qi, M.Gorska, P.H.Regan, O.Aktas, H.M.Albers, A.Banerjee, M.M.R.Chishti, J.Gerl, N.Hubbard, S.Jazrawi, J.Jolie, A.K.Mistry, M.Polettini, A.Yaneva, S.Alhomaidhi, J.Zhao, T.Arici, S.Bagchi, G.Benzoni, P.Boutachkov, T.Davinson, T.Dickel, E.Haettner, O.Hall, Ch.Hornung, J.P.Hucka, P.R.John, I.Kojouharov, R.Knobel, D.Kostyleva, N.Kuzminchuk, I.Mukha, W.R.Plass, B.S.Nara Singh, J.Vasiljevic, S.Pietri, Zs.Podolyak, M.Rudigier, H.Rosch, E.Sahin, H.Schaffner, C.Scheidenberger, F.Schirru, A.Sharma, R.Shearman, Y.Tanaka, J.Vesic, H.Weick, H.J.Wollersheim, U.Ahmed, A.Algora, C.Appleton, J.Benito, A.Blazhev, A.Bracco, A.M.Bruce, M.Brunet, R.Canavan, A.Esmaylzadeh, L.M.Fraile, G.Hafner, H.Heggen, D.Kahl, V.Karayonchev, R.Kern, A.Korgul, G.Kosir, N.Kurz, R.Lozeva, M.Mikolajczuk, P.Napiralla, R.Page, C.M.Petrache, N.Pietralla, J.-M.Regis, P.Ruotsalainen, L.Sexton, V.Sanchez-Temble, M.Si, J.Vilhena, V.Werner, J.Wiederhold, W.Witt, P.J.Woods, G.Zimba

Nature of seniority symmetry breaking in the semimagic nucleus 94Ru

RADIOACTIVITY 95mPd(β+p)[from 9Be(124Xe, F), E=850 MeV/nucleon];measured Eγ, Iγ, Ep, Ip, γγ-coin, pγ-coin. 94Ru; deduced T1/2 of low-lying excited states, B(E2). Comparison to shell-model calculations. Ions were separated with FRS at GSI and implanted in the Advanced Implantation Detector Array (AIDA), composed of three double-sided silicon strip detectors (DSSSDs) situated at the center of the DEcay SPECtroscopy (DESPEC) setup, comprised of a hybrid array of six triple cluster high-purity germanium (HPGe) detectors and 36 LaBr3(Ce) detectors of the FAst TIMing Array (FATIMA).

doi: 10.1103/PhysRevC.105.L031304
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2022LI49      Phys.Rev. C 106, 034304 (2022)

X.Liu, B.Cederwall, C.Qi, R.A.Wyss, O.Aktas, A.Ertoprak, W.Zhang, E.Clement, G.de France, D.Ralet, A.Gadea, A.Goasduff, G.Jaworski, I.Kuti, B.M.Nyako, J.Nyberg, M.Palacz, R.Wadsworth, J.J.Valiente-Dobon, H.Al-Azri, A.Atac Nyberg, T.Back, G.de Angelis, M.Doncel, J.Dudouet, A.Gottardo, M.Jurado, J.Ljungvall, D.Mengoni, D.R.Napoli, C.M.Petrache, D.Sohler, J.Timar, D.Barrientos, P.Bednarczyk, G.Benzoni, B.Birkenbach, A.J.Boston, H.C.Boston, I.Burrows, L.Charles, M.Ciemala, F.C.L.Crespi, D.M.Cullen, P.Desesquelles, C.Domingo-Pardo, J.Eberth, N.Erduran, S.Erturk, V.Gonzalez, J.Goupil, H.Hess, T.Huyuk, A.Jungclaus, W.Korten, A.Lemasson, S.Leoni, A.Maj, R.Menegazzo, B.Million, R.M.Perez-Vidal, Zs.Podolyak, A.Pullia, F.Recchia, P.Reiter, F.Saillant, M.D.Salsac, E.Sanchis, J.Simpson, O.Stezowski, C.Theisen, M.Zielinska

Evidence for spherical-oblate shape coexistence in 87Tc

NUCLEAR REACTIONS 54Fe(36Ar, 2np)87Tc, E=115 MeV; measured Eγ, Iγ, γγ-coin, (particle)γ-coin using AGATA array with 11 triple-cluster segmented HPGe detectors, DIAMANT array with 60 CsI(Tl) scintillators for protons, NEDA and NeutronWall arrays for neutrons with 54 and 42 organic liquid scintillator detectors at the GANIL facility. 87Tc; deduced levels, J, π, band-like structure, g.s. Jπ, intensity ratios in different channels, configurations, spherical behavior. Comparison with shell model and total Routhian surface calculations, and with their previous results reported in 2021Li40 (Phys. Rev. C 104, L021302).

doi: 10.1103/PhysRevC.106.034304
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2022YA21      Phys.Rev. C 106, 024325 (2022)

G.L.Yang, B.Qi, X.D.Wang, C.Qi

Neutron-proton interaction in odd-odd nuclei from statistical analysis

NUCLEAR STRUCTURE A=4-260; analyzed experimental binding energy data extracted from AME2020; deduced proton-neutron interactions, correlations for pn-interactions between neighboring nuclei. Additional attractive np-interaction which persists between the last proton and last neutron in odd-odd nuclei resulted from statistical analysis.

doi: 10.1103/PhysRevC.106.024325
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2022ZE02      Phys.Rev. C 106, 034307 (2022)

Q.B.Zeng, S.Guo, Z.Liu, J.G.Li, H.H.Li, J.G.Wang, Z.Y.Zhang, L.Ma, Y.H.Qiang, M.H.Huang, G.S.Li, Y.D.Fang, M.L.Liu, B.Ding, Y.Zheng, J.H.Li, H.Y.Lu, W.Q.Zhang, K.L.Wang, X.Y.Liu, H.Huang, F.F.Zeng, X.H.Yu, A.Rohilla, J.F.Huang, H.L.Fan, C.Qi, C.X.Yuan, C.M.Petrache, E.A.Lawrie, W.Zuo, Z.G.Gan, X.H.Zhou

Configurations of the low-lying states in 146Eu

RADIOACTIVITY 146mEu(IT) [from 124Sn(27Al, 5n), E=127 MeV, followed by mass-separation of evaporation residues (ERs) using the SHANS separator at the Sector-Focusing Cyclotron (SFC) of HIRFL-Lanzhou]; measured Eγ, Iγ, γγ-coin, isomer and level T1/2 by γ(t) and γγ(t) fast-timing method using three LaBr3(Ce) detectors, one coaxial and one Clover HPGe detectors, and analyzed using mirror symmetric centroid difference (MSCD) method. 146Eu; deduced levels, J, π, T1/2 of 6- levels and a 9+ isomer, multipolarities, upper limits of multipole mixing ratios, B(M1), spherical configurations. 146Sm; measured level T1/2 of the first 2+ state as a test case for measurements of short half-lives for levels in 146Eu. Comparison with shell model calculations using several different effective interactions, and with previous experimental results. Systematics of levels and B(M1) values in N=83 isotones 142Pr, 144Pm, 146Eu.

doi: 10.1103/PhysRevC.106.034307
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2022ZH45      Phys.Rev. C 106, 024305 (2022)

M.M.Zhang, Y.L.Tian, Y.S.Wang, Z.Y.Zhang, Z.G.Gan, H.B.Yang, M.H.Huang, L.Ma, C.L.Yang, J.G.Wang, C.X.Yuan, C.Qi, A.N.Andreyev, X.Y.Huang, S.Y.Xu, Z.Zhao, L.X.Chen, J.Y.Wang, M.L.Liu, Y.H.Qiang, G.S.Li, W.Q.Yang, R.F.Chen, H.B.Zhang, Z.W.Lu, X.X.Xu, L.M.Duan, H.R.Yang, W.X.Huang, Z.Liu, X.H.Zhou, Y.H.Zhang, H.S.Xu, N.Wang, H.B.Zhou, X.J.Wen, S.Huang, W.Hua, L.Zhu, X.Wang, Y.C.Mao, X.T.He, S.Y.Wang, W.Z.Xu, H.W.Li, Y.F.Niu, L.Guo, Z.Z.Ren, S.G.Zhou

Fine structure in the α decay of the 8+ isomer in 216, 218U

RADIOACTIVITY 216,216m,218,218mU(α)[218U from 182W(40Ar, 4n), E=190 MeV, 184W(40Ca, 2nα), E=206 MeV, 216U from 180W(40Ar, 4n), E=191 MeV]; measured evaporation residues (EVRs), Eα, Iα, (EVR)α12-correlations, T1/2 using position-sensitive strip detectors (PSSDs) for α detection, and SHANS separator at HIRFL-Lanzhou. 216,216m,218,218mU; deduced T1/2, Q-values, α-branching ratio, α-decay hindrance factors. 204Rn, 208,210Ra, 212,214Th(α)[from 216,218U α-decay chains]; measured Eα, T1/2. 212Th; deduced level, J, π, identification of the first 2+ state. 215Ra, 212,213,216Ac, 211,212,213,214,216,216m,217Th, 216,217,217m,218Pa, 217,218,219U; observed Eα from their decays from (EVR)α-correlations. Comparison with previous experimental data.

doi: 10.1103/PhysRevC.106.024305
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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
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2021LI40      Phys.Rev. C 104, L021302 (2021)

X.Liu, B.Cederwall, C.Qi, R.A.Wyss, O.Aktas, A.Ertoprak, W.Zhang, E.Clement, G.de France, D.Ralet, A.Gadea, A.Goasduff, G.Jaworski, I.Kuti, B.M.Nyako, J.Nyberg, M.Palacz, R.Wadsworth, J.J.Valiente-Dobon, H.Al-Azri, A.Atac Nyberg, T.Back, G.de Angelis, M.Doncel, J.Dudouet, A.Gottardo, M.Jurado, J.Ljungvall, D.Mengoni, D.R.Napoli, C.M.Petrache, D.Sohler, J.Timar, D.Barrientos, P.Bednarczyk, G.Benzoni, B.Birkenbach, A.J.Boston, H.C.Boston, I.Burrows, L.Charles, M.Ciemala, F.C.L.Crespi, D.M.Cullen, P.Desesquelles, C.Domingo-Pardo, J.Eberth, N.Erduran, S.Erturk, V.Gonzalez, J.Goupil, H.Hess, T.Huyuk, A.Jungclaus, W.Korten, A.Lemasson, S.Leoni, A.Maj, R.Menegazzo, B.Million, R.M.Perez-Vidal, Zs.Podolyak, A.Pullia, F.Recchia, P.Reiter, F.Saillant, M.D.Salsac, E.Sanchis, J.Simpson, O.Stezowski, C.Theisen, M.Zielinska

Evidence for enhanced neutron-proton correlations from the level structure of the N = Z + 1 nucleus 8743Tc44

NUCLEAR REACTIONS 54Fe(36Ar, 2np)87Tc, E=115 MeV; measured Eγ, Iγ, charged particles, (particle)g- and γγ-coin using AGATA array of 11 triple-cluster segmented HPGe detectors for γ rays and DIAMANT array of 60 CsI(Tl) scintillators for particles at the GANIL accelerator complex. 87Tc; deduced high-spin levels, J, π, rotational band, kinematic moments of inertia, alignment. Comparison with the structures of neighboring odd-mass N=44 and N=43 isotonic chains, and with shell-model calculations. Systematics of positive-parity yrast states in 83Y, 85Nb, 87,89,91,93Tc.

doi: 10.1103/PhysRevC.104.L021302
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2021QI06      Phys.Lett. B 818, 136373 (2021)

C.Qi, R.J.Liotta, R.Wyss

Alpha decay measured in single-particle units as a manifestation of nuclear collectivity

doi: 10.1016/j.physletb.2021.136373
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2021SO16      Nucl.Phys. A1013, 122221 (2021)

A.Soylu, C.Qi

Extended universal decay law formula for the α and cluster decays

RADIOACTIVITY 221Fr, 221,222,223,224Ra, 225Ac, 226Ra, 226Th(14C), 223Ac(15N), 226Th(18O), 228Th(20O), 230U(22Ne), 231Pa(23F), 230Th(24Ne), 230U, 231Pa, 232Th, 232,233,234,235,236U(24Ne), 233,235U(25Ne), 232Th, 234,236U(26Ne), 232,233,234,235,236U, 236,238Pu(28Mg), 236U, 237Np, 238Pu(30Mg), 238Pu(38Si), 240Pu, 241Am, 242Cm(34Si); calculated T1/2 using the Universal Decay Law (UDL) formula for the alpha and cluster decays. Comparison with experimental data.

doi: 10.1016/j.nuclphysa.2021.122221
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2021ZH22      Phys.Rev.Lett. 126, 152502 (2021)

Z.Y.Zhang, H.B.Yang, M.H.Huang, Z.G.Gan, C.X.Yuan, C.Qi, A.N.Andreyev, M.L.Liu, L.Ma, M.M.Zhang, Y.L.Tian, Y.S.Wang, J.G.Wang, C.L.Yang, G.S.Li, Y.H.Qiang, W.Q.Yang, R.F.Chen, H.B.Zhang, Z.W.Lu, X.X.Xu, L.M.Duan, H.R.Yang, W.X.Huang, Z.Liu, X.H.Zhou, Y.H.Zhang, H.S.Xu, N.Wang, H.B.Zhou, X.J.Wen, S.Huang, W.Hua, L.Zhu, X.Wang, Y.C.Mao, X.T.He, S.Y.Wang, W.Z.Xu, H.W.Li, Z.Z.Ren, S.G.Zhou

New α-Emitting Isotope 214U and Abnormal Enhancement of α-Particle Clustering in Lightest Uranium Isotopes

RADIOACTIVITY 214,216,218U(α) [from 180,182W(36Ar, 4n), 184W(40Ca, 2nα), E<200 MeV]; measured decay products, Eα, Iα; deduced α-decay Q-values and reduced widths, T1/2, abnormal enhancement by the strong monopole interaction between the valence protons and neutrons. Comparison withavailable data, calculations.

doi: 10.1103/PhysRevLett.126.152502
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetS0279. Data from this article have been entered in the XUNDL database. For more information, click here.


2021ZH52      Phys.Lett. B 820, 136527 (2021)

W.Zhang, B.Cederwall, M.Doncel, O.Aktas, A.Ertoprak, R.Liotta, C.Qi, T.Grahn, B.S.Nara Singh, D.M.Cullen, D.Hodge, M.Giles, S.Stolze, H.Badran, T.Braunroth, T.Calverley, D.M.Cox, Y.D.Fang, P.T.Greenlees, J.Hilton, E.Ideguchi, R.Julin, S.Juutinen, M.Kumar Raju, H.Li, H.Liu, S.Matta, P.Subramaniam, V.Modamio, J.Pakarinen, P.Papadakis, J.Partanen, C.M.Petrache, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, J.Sorri, M.J.Taylor, J.Uusitalo, J.J.Valiente-Dobon

Lifetime measurements of excited states in 169, 171, 173Os: Persistence of anomalous B(E2) ratios in transitional rare earth nuclei in the presence of a decoupled i13/2 valence neutron

NUCLEAR REACTIONS 92Mo(83Kr, X)169Os/171Os/173Os, E=383 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies, J, π, level lifetimes, B(E2). Recoil-distance Doppler shift and recoil-isomer tagging techniques.

doi: 10.1016/j.physletb.2021.136527
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2021ZH63      Phys.Rev. C 104, 064305 (2021)

W.Zhang, B.Cederwall, C.Qi, A.Ertoprak, O.Aktas, X.Liu, K.Andgren, K.Auranen, T.Back, L.Barber, G.Beeton, D.M.Cullen, I.G.Darby, M.R.Dimmock, S.Eeckhaudt, E.Ganioglu, M.Gorska, T.Grahn, P.T.Greenlees, B.Hadinia, E.Ideguchi, A.Illana, P.M.Jones, D.T.Joss, R.Julin, S.Juutinen, J.M.Keatings, A.Khaplanov, F.Kulali, M.Leino, M.Luoma, B.Lv, B.S.Nara Singh, L.Nelson, M.Niikura, M.Nyman, J.Ojala, R.D.Page, J.Pakarinen, E.S.Paul, C.Petrache, M.Petri, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, J.F.Smith, J.Sorri, H.Tann, G.Zimba, J.Uusitalo, R.Wadsworth, R.Wyss

Identification of excited states in 10752Te55

NUCLEAR REACTIONS 58Ni(54Fe, 3n2p)107Te, E=195 MeV; 54Fe(58Ni, 3n2p)107Te, E=215 MeV; measured recoils, Eγ, Iγ, γγ-coin, (particle)γ-coin using EUROGAM array of 43 Compton-suppressed HPGe detectors and recoiling fusion evaporation products separated by RITU separator and implanted into two double-sided silicon strip detectors (DSSDs) of the GREAT spectrometer in 58Ni(54Fe, 3n2p) experiment, and using Jurogam III array of 15 Eurogam and 24 Euroball clover escape-suppressed Ge detectors, with evaporation products separated by MARA separator and implanted into the DSSD for the 54Fe(58Ni, 3n2p) experiment, both performed at the University of Jyvaskyla Accelerator Laboratory using recoil-decay tagging technique. 107Te; deduced high-spin levels, J, π, νh11/2 band. Comparison with large-scale shell-model calculations and total Routhian surface calculations. Systematics of νh11/2 bands and level structures in 107,109,111,113,115,117,119Te.

doi: 10.1103/PhysRevC.104.064305
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2020CA10      Phys.Rev. C 101, 054304 (2020)

B.Cai, G.Chen, J.Xu, C.Yuan, C.Qi, Y.Yao

α decay half-life estimation and uncertainty analysis

RADIOACTIVITY 106,108Te, 112Xe, 114Ba, 144Nd, 146,147,148Sm, 148,150,152Gd, 149Tb, 150,152,154Dy, 152,154,156Er, 154,156,158Yb, 156,158,160,162,174Hf, 160,162,163,164,166,168,180W, 163Re, 166,167,168,170,172,174,186Os, 167Ir, 168,171,172,174,176,177,178,180,182,184,186,188,190Pt, 175Au, 172,174,176,178,180,182,183,184,185,186,188Hg, 178,180,184,186,188,190,192,194,210Pb, 209,211,213Bi, 186,190,194,196,198,200,202,204,206,208,210,212,213,214,215,216,218Po, 203,205,207,209,211,213,215,217At, 194,196,200,202,204,206,208,209,210,211,212,214,216,217,218,219,220,222Rn, 215,217,219Fr, 202,204,208,209,213,214,216,218,220,221,222,223,224,226Ra, 219Ac, 208,212,214,216,218,220,222,224,226,228,229,230,232Th, 219,221,231Pa, 216,218,222,224,226,230,232,233,234,235,236,238U, 237Np, 228,230,232,234,236,238,239,240,242,244Pu, 241Am, 234,236,238,240,242,244,246,248Cm, 240,242,244,245,246,248,250,252,254Cf, 253Es, 248,252,254,255,256Fm, 254,256No, 256,258Rf, 260Sg, 264Hs, 270Ds(α); evaluated theoretical half-lives and associated uncertainties from the universal decay law (UDL) and the new Geiger-Nuttall law (NGNL), and systematics half-lives using nonparametric bootstrap method; discussed shell effect and the pairing effect.

doi: 10.1103/PhysRevC.101.054304
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2020CE01      Phys.Rev.Lett. 124, 062501 (2020)

B.Cederwall, X.Liu, O.Aktas, A.Ertoprak, W.Zhang, C.Qi, E.Clement, G.de France, D.Ralet, A.Gadea, A.Goasduff, G.Jaworski, I.Kuti, B.M.Nyako, J.Nyberg, M.Palacz, R.Wadsworth, J.J.Valiente-Dobon, H.Al-Azri, A.Atac Nyberg, T.Back, G.de Angelis, M.Doncel, J.Dudouet, A.Gottardo, M.Jurado, J.Ljungvall, D.Mengoni, D.R.Napoli, C.M.Petrache, D.Sohler, J.Timar, D.Barrientos, P.Bednarczyk, G.Benzoni, B.Birkenbach, A.J.Boston, H.C.Boston, I.Burrows, L.Charles, M.Ciemala, F.C.L.Crespi, D.M.Cullen, P.Desesquelles, C.Domingo-Pardo, J.Eberth, N.Erduran, S.Erturk, V.Gonzalez, J.Goupil, H.Hess, T.Huyuk, A.Jungclaus, W.Korten, A.Lemasson, S.Leoni, A.Maj, R.Menegazzo, B.Million, R.M.Perez-Vidal, Zs.Podolyak, A.Pullia, F.Recchia, P.Reiter, F.Saillant, M.D.Salsac, E.Sanchis, J.Simpson, O.Stezowski, Ch.Theisen, M.Zielinska

Isospin Properties of Nuclear Pair Correlations from the Level Structure of the Self-Conjugate Nucleus 88Ru

NUCLEAR REACTIONS 54Fe(36Ar, 2n), E=115 MeV; measured Eγ, Iγ, (neutron)γ-, (charged particle)γ-, γγ-coin. 88Ru; deduced levels, J, π, yrast band, moment of inertia. Comparison with neighboring isotopes and cranked shell model calculations. AGATA, DIAMANT, and NEDA arrays.

doi: 10.1103/PhysRevLett.124.062501
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2020ER01      Eur.Phys.J. A 56, 65 (2020)

A.Ertoprak, B.Cederwall, C.Qi, O.Aktas, M.Doncel, B.Hadinia, R.Liotta, M.Sandzelius, C.Scholey, K.Andgren, T.Back, H.Badran, T.Braunroth, T.Calverley, D.M.Cox, D.M.Cullen, Y.D.Fang, E.Ganioglu, M.Giles, M.B.Gomez Hornillos, T.Grahn, P.T.Greenlees, J.Hilton, D.Hodge, E.Ideguchi, U.Jakobsson, A.Johnson, P.M.Jones, R.Julin, S.Juutinen, S.Ketelhut, A.Khaplanov, M.Kumar Raju, M.Leino, H.Li, H.Liu, S.Matta, V.Modamio, B.S.Nara Singh, M.Niikura, M.Nyman, I.Ozgur, R.D.Page, J.Pakarinen, P.Papadakis, J.Partanen, E.S.Paul, C.M.Petrache, P.Peura, P.Rahkila, P.Ruotsalainen, J.Saren, J.Sorri, S.Stolze, P.Subramaniam, M.J.Taylor, J.Uusitalo, J.J.Valiente-Dobon, R.Wyss

Evidence for octupole collectivity in 172Pt

NUCLEAR REACTIONS 96Ru(78Kr, 2pγ)172Pt, E=342, 348 MeV; 92Mo(83Kr, 3nγ)172Pt, E=383 MeV; Measured Eγ, Iγ, γγ-coin, γ(θ), γγ(linear polarization), recoils using RITU gas-filled separator, JUROGAM I and JUROGAM II arrays of HPGe detectors, and the GREAT spectrometer consisting of silicon strip detectors, multiwire proportional counter (MWPC), array of Si PIN-diode detectors, one planar and one clover HPGe detector at the K-130 cyclotron facility of the University of Jyvaskyla. 172Pt; deduced high-spin levels, Jπ, multipolarities, bands, configurations, evidence for octupole collectivity. Comparison with large-scale shell model (LSSM) and total Routhian surface (TRS) calculations.

doi: 10.1140/epja/s10050-020-00071-6
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2020ER04      Eur.Phys.J. A 56, 291 (2020)

A.Ertoprak, C.Qi, B.Cederwall, M.Doncel, U.Jakobsson, B.M.Nyako, G.Jaworski, P.Davies, G.de France, I.Kuti, D.R.Napoli, R.Wadsworth, S.S.Ghugre, R.Raut, B.Akkus, H.Al-Azri, A.Algora, G.de Angelis, A.Atac, T.Back, A.Boso, E.Clement, D.M.Debenham, Zs.Dombradi, S.Erturk, A.Gadea, F.Ghazi Moradi, A.Gottardo, T.Huyuk, E.Ideguchi, H.Li, C.Michelagnoli, V.Modamio, J.Nyberg, M.Palacz, C.M.Petrache, F.Recchia, M.Sandzelius, M.Siciliano, D.Sohler, J.Timar, J.J.Valiente-Dobon, Z.G.Xiao

Lifetimes of core-excited states in semi-magic 95Rh

NUCLEAR REACTIONS 58Ni(40Ca, 3p), E=150 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies and intensities, J, π, level lifetimes, B(M1), B(E2), σ. Comparison with available data. The Doppler Shift Attenuation Method (DSAM) based on the Doppler broadened line shapes, the Grand Accelerateur National d'Ions Lourds (GANIL) accelerator facility.

doi: 10.1140/epja/s10050-020-00297-4
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2020SU02      Phys.Lett. B 800, 135096 (2020)

M.D.Sun, Z.Liu, T.H.Huang, W.Q.Zhang, A.N.Andreyev, B.Ding, J.G.Wang, X.Y.Liu, H.Y.Lu, D.S.Hou, Z.G.Gan, L.Ma, H.B.Yang, Z.Y.Zhang, L.Yu, J.Jiang, K.L.Wang, Y.S.Wang, M.L.Liu, Z.H.Li, J.Li, X.Wang, A.H.Feng, C.J.Lin, L.J.Sun, N.R.Ma, W.Zuo, H.S.Xu, X.H.Zhou, G.Q.Xiao, C.Qi, F.S.Zhang

Fine structure in the α decay of 223U

RADIOACTIVITY 223U, 219Th, 215Ra(α) [from 187Re(40Ar, 3np), E=188 MeV]; measured reaction products, Eα, Iα; deduced α-decay branches, fine structure.

doi: 10.1016/j.physletb.2019.135096
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2019WA10      Chin.Phys.Lett. 36, 32101 (2019)

Y.-Z.Wang, Y.Li, C.Qi, J.-Z.Gu

Pairing Effects on Bubble Nuclei

NUCLEAR STRUCTURE 46Ar, 206Hg; calculated proton density distributions, occupation probabilities of the proton s states; deduced the difference between the bubble structure with the surface pairing and those with the volume and mixed pairings.

doi: 10.1088/0256-307x/36/3/032101
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2019WA30      Chin.Phys.C 43, 114101 (2019)

Y.-Z.Wang, X.-D.Su, C.Qi, J.-Z.Gu

Tensor force effect on the exotic structure of neutron-rich Ca isotopes*

NUCLEAR STRUCTURE 56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74Ca; calculated two neutron separation energy, radii, neutron density distributions using spherical Skyrme-Hartree-Fock-Bogoliubov (SHFB) approach.

doi: 10.1088/1674-1137/43/11/114101
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2018CE02      Phys.Rev.Lett. 121, 022502 (2018)

B.Cederwall, M.Doncel, O.Aktas, A.Ertoprak, R.Liotta, C.Qi, T.Grahn, D.M.Cullen, D.Hodge, M.Giles, S.Stolze, H.Badran, T.Braunroth, T.Calverley, D.M.Cox, Y.D.Fang, P.T.Greenlees, J.Hilton, E.Ideguchi, R.Julin, S.Juutinen, M.Kumar Raju, H.Li, H.Liu, S.Matta, V.Modamio, J.Pakarinen, P.Papadakis, J.Partanen, C.M.Petrache, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, J.Sorri, P.Subramaniam, M.J.Taylor, J.Uusitalo, J.J.Valiente-Dobon

Lifetime Measurements of Excited States in 172Pt and the Variation of Quadrupole Transition Strength with Angular Momentum

NUCLEAR REACTIONS 92Mo(83Kr, 3n)172Pt, E=383 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies, 2+ and 4+ lifetimes, B(E2). Comparison with systematics, Alaga rule.

doi: 10.1103/physrevlett.121.022502
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2018ER01      Eur.Phys.J. A 54, 145 (2018)

A.Ertoprak, B.Cederwall, C.Qi, M.Doncel, U.Jakobsson, B.M.Nyako, G.Jaworski, P.Davies, G.de France, I.Kuti, D.R.Napoli, R.Wadsworth, S.S.Ghugre, R.Raut, B.Akkus, H.Al-Azri, A.Algora, G.de Angelis, A.Atac, T.Back, A.Boso, E.Clement, D.M.Debenham, Zs.Dombradi, S.Erturk, A.Gadea, F.Ghazi Moradi, A.Gottardo, T.Huyuk, E.Ideguchi, H.Li, C.Michelagnoli, V.Modamio, J.Nyberg, M.Palacz, C.M.Petrache, F.Recchia, M.Sandzelius, M.Siciliano, J.Timar, J.J.Valiente-Dobon, Z.G.Xiao

M1 and E2 transition rates from core-excited states in semi-magic 94Ru

NUCLEAR REACTIONS 58Ni(40Ca, 4p)94Ru, E=128 MeV; measured Eγ, Iγ(θ), γγ-coin, Doppler-broadened line shapes using EXOGAM spectrometer array of 11 Compton-suppressed HPGe; deduced 94Ru γ-ray spectra, lineshapes, γ-ray transitions between discrete states, γ intensities, B(M1), B(E2), T1/2 of discrete dicrete high-spin states.

doi: 10.1140/epja/i2018-12581-7
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2018QI08      Phys.Rev. C 98, 061303 (2018)

Y.Qian, C.Qi

Partial seniority conservation and solvability of single-j systems

doi: 10.1103/PhysRevC.98.061303
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2018XU08      Eur.Phys.J. A 54, 83 (2018)

Q.Xu, Z.G.Xiao, S.J.Zhu, C.Qi, H.Jia, B.Qi, R.S.Wang, W.J.Cheng, Y.Zhang, H.Yi, L.M.Lu, Y.J.Wang, H.J.Li, Y.Huang, Z.Zhang, X.G.Wu, C.B.Li, Y.Zheng, Q.M.Chen, W.K.Zhou, G.S.Li

Investigation of high spin states in 133Cs

NUCLEAR REACTIONS 130Te(7Li, 4n), E=38 MeV; measured in-beam Eγ, Iγ(θ), γγ-coin using 12 Compton-suppressed Ge detectors at HI-13 Tandem at CIAE (China Institute of Atomic Energy). 133Cs; deduced level scheme, levels, J, π up to high spin of 31/2, rotational bands, γ transition intensities; updated systematics of 2+ states in N=78 even-even isotopes of A=130-134. 133Cs, 132Xe; calculated levels, J, π, B(M1)/B(E2), moments of inertia using large-scale shell model; compared to experimental data.

doi: 10.1140/epja/i2018-12520-8
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2017DO06      Phys.Rev. C 95, 044321 (2017)

M.Doncel, B.Cederwall, C.Qi, H.Li, U.Jakobsson, K.Auranen, S.Bonig, M.C.Drummond, T.Grahn, P.T.Greenlees, A.Herzan, D.T.Joss, R.Julin, S.Juutinen, J.Konki, T.Kroll, M.Leino, C.McPeake, D.O'Donnell, R.D.Page, J.Pakarinen, J.Partanen, P.Peura, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, B.Saygi, C.Scholey, J.Sorri, S.Stolze, M.J.Taylor, A.Thornthwaite, J.Uusitalo

Lifetime measurements of excited states in 162W and 164W and the evolution of collectivity in rare-earth nuclei

NUCLEAR REACTIONS 92Mo(78Kr, 2α), (78Kr, 2pα), E=380 MeV; measured Eγ, half-lives of the first 2+ states by recoil-distance Doppler-shift (RDDS) method using DPUNS differential plunger device and RITU separator at Jyvaskyla K-130 cyclotron facility. 162,164W; deduced levels, B(E2) for the first 2+ states. Comparison with systematics of B(E2) values for neighboring nuclei, and with theoretical calculations.

doi: 10.1103/PhysRevC.95.044321
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2017DO12      Phys.Rev. C 96, 051304 (2017)

M.Doncel, T.Back, C.Qi, D.M.Cullen, D.Hodge, B.Cederwall, M.J.Taylor, M.Procter, M.Giles, K.Auranen, T.Grahn, P.T.Greenlees, U.Jakobsson, R.Julin, S.Juutinen, A.Herzan, J.Konki, J.Pakarinen, J.Partanen, P.Peura, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, J.Sorri, S.Stolze, J.Uusitalo

Spin-dependent evolution of collectivity in 112Te

NUCLEAR REACTIONS 58Ni(58Ni, 4p), E not given; measured Eγ, Iγ, γγ-coin, level half-lives by recoil distance Doppler-shift (RDDS) method using Jurogam II detector array, RITU gas-filled recoil separator, and differential plunger for unbound nuclear states (DPUNS) at the Cyclotron Accelerator Laboratory of University of Jyvaskyla. 112Te; deduced levels, J, π, B(E2) for the first 2+, 4+ and 6+ states, E(4+)/E(2+), E(6+)/E(2+) ratios; calculated potential-energy surfaces. Comparison with shell-model calculations. Systematics of B(E2) for the first 2+, 4+ and 6+ states in 112,114,118,120,122,124Te.

doi: 10.1103/PhysRevC.96.051304
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2017QI01      J.Phys.(London) G44, 045107 (2017)

C.Qi

Differential evolution algorithm for global optimizations in nuclear physics

doi: 10.1088/1361-6471/aa5f87
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2017QI04      Phys.Lett. B 773, 616 (2017)

C.Qi

Partial conservation of seniority and its unexpected influence on E2 transitions in g9/2 nuclei

NUCLEAR STRUCTURE 96Pd, 94Ru; calculated energy levels, J, π, B(E2); deduced that sharp transition from pure seniority coupling to a significant mixture between the and states due to the cross-orbital non-diagonal interaction matrix elements.

doi: 10.1016/j.physletb.2017.09.025
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2017SU18      Phys.Lett. B 771, 303 (2017)

M.D.Sun, Z.Liu, T.H.Huang, W.Q.Zhang, J.G.Wang, X.Y.Liu, B.Ding, Z.G.Gan, L.Ma, H.B.Yang, Z.Y.Zhang, L.Yu, J.Jiang, K.L.Wang, Y.S.Wang, M.L.Liu, Z.H.Li, J.Li, X.Wang, H.Y.Lu, C.J.Lin, L.J.Sun, N.R.Ma, C.X.Yuan, W.Zuo, H.S.Xu, X.H.Zhou, G.Q.Xiao, C.Qi, F.S.Zhang

New short-lived isotope 223Np and the absence of the Z = 92 subshell closure near N = 126

RADIOACTIVITY 223Np, 219Pa, 219Th, 218Ac, 216Ra, 215Ac(α) [from 187Re(40Ar, X)223Np, E=188 MeV]; measured decay products, Eα, Iα; deduced T1/2, Q-values, disprove the existence of a Z=92 subshell closure. Comparison with available data.

doi: 10.1016/j.physletb.2017.03.074
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2017WA18      Phys.Lett. B 770, 83 (2017)

F.Wang, B.H.Sun, Z.Liu, R.D.Page, C.Qi, C.Scholey, S.F.Ashley, L.Bianco, I.J.Cullen, I.G.Darby, S.Eeckhaudt, A.B.Garnsworthy, W.Gelletly, M.B.Gomez Hornillos, T.Grahn, P.T.Greenlees, D.G.Jenkins, G.A.Jones, P.Jones, D.T.Joss, R.Julin, S.Juutinen, S.Ketelhut, S.Khan, A.Kishada, M.Leino, M.Niikura, M.Nyman, J.Pakarinen, S.Pietri, Z.Podolyak, P.Rahkila, S.Rigby, J.Saren, T.Shizuma, J.Sorri, S.Steer, J.Thomson, N.J.Thompson, J.Uusitalo, P.M.Walker, S.Williams, H.F.Zhang, W.Q.Zhang, L.H.Zhu

Spectroscopic factor and proton formation probability for the d3/2 proton emitter 151mLu

RADIOACTIVITY 151Lu(p) [from 96Ru(58Ni, X)151Lu, E=266, 274 MeV]; measured decay products, Ep, Ip, Eγ, Iγ; deduced γ-ray energies and intensities, spectroscopic factors, proton-decay formation amplitudes, Q-value, T1/2. Comparison with theoretical calculations.

doi: 10.1016/j.physletb.2017.04.034
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2017WA49      Phys.Rev. C 96, 064307 (2017); Erratum Phys.Rev. C 97, 029902 (2018)

F.Wang, B.H.Sun, Z.Liu, C.Qi, L.H.Zhu, C.Scholey, S.F.Ashley, L.Bianco, I.J.Cullen, I.G.Darby, S.Eeckhaudt, A.B.Garnsworthy, W.Gelletly, M.B.Gomez Hornillos, T.Grahn, P.T.Greenlees, D.G.Jenkins, G.A.Jones, P.Jones, D.T.Joss, R.Julin, S.Juutinen, S.Ketelhut, S.Khan, A.Kishada, M.Leino, M.Niikura, M.Nyman, R.D.Page, J.Pakarinen, S.Pietri, Zs.Podolyak, P.Rahkila, S.Rigby, J.Saren, T.Shizuma, J.Sorri, S.Steer, J.Thomson, N.J.Thompson, J.Uusitalo, P.M.Walker, S.Williams

Reinvestigation of the excited states in the proton emitter 151Lu: Particle-hole excitations across the N=Z=64 subshell

NUCLEAR REACTIONS 96Ru(58Ni, 2np), E=266, 274 MeV; measured fusion-evaporation residues, Eγ, Iγ, γγ-coin, pγ-coin using RITU separator, GREAT spectrometer and JUROGAM array at the K130 cyclotron facility of the University of Jyvaskyla. Recoil-Decay Tagging (RDT) technique. 151Lu; deduced high-spin levels, J, π, sequences. Comparison with large-scale shell-model calculations.

doi: 10.1103/PhysRevC.96.064307
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2016CA42      Phys.Rev. C 94, 064311 (2016)

R.J.Carroll, B.Hadinia, C.Qi, D.T.Joss, R.D.Page, J.Uusitalo, K.Andgren, B.Cederwall, I.G.Darby, S.Eeckhaudt, T.Grahn, C.Gray-Jones, P.T.Greenlees, P.M.Jones, R.Julin, S.Juutinen, M.Leino, A.-P.Leppanen, M.Nyman, J.Pakarinen, P.Rahkila, M.Sandzelius, J.Saren, C.Scholey, D.Seweryniak, J.Simpson

Multiparticle configurations of excited states in 155Lu

NUCLEAR REACTIONS 102Pd(58Ni, pα)155Lu/156Lu/157Lu/156Hf/157Hf/157Ta/158Ta/159Ta/158W, E=255 MeV; measured reaction products, Eγ, Iγ, delayed γ, (recoils)(α)γγ-coin using RITU separator, JUROGAM array and GREAT spectrometer at Jyvaskyla Accelerator Laboratory. Recoil-decay tagging (RDT) technique. 155Lu; deduced levels, J, π, multipolarity, configurations, anti-aligned 1+ interaction between h11/2 protons and h9/2 neutrons. Comparison with shell-model calculations. Systematics of excited states in odd-A N=84 isotones of 149Tb, 151Ho, 153Tm, 155Lu, 157Ta.

doi: 10.1103/PhysRevC.94.064311
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2016CH17      Nucl.Phys. A951, 97 (2016)

S.A.Changizi, C.Qi

Odd-even staggering in neutron drip line nuclei

NUCLEAR STRUCTURE 18,19,20,21,22,23,24,25,26,27,28O, 49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109Ni, 100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,176,177,178Sn; calculated quasi-particle energies in different orbitals, Q-value, neutron separation energy, even-odd pairing effects using HFB with density-dependent forces.

doi: 10.1016/j.nuclphysa.2016.03.056
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2016CH32      Phys.Rev. C 94, 024321 (2016)

Y.Y.Cheng, C.Qi, Y.M.Zhao, A.Arima

Nucleon-pair states of even-even Sn isotopes based on realistic effective interactions

NUCLEAR STRUCTURE 104,106,108,128,126,124Sn; calculated levels, yrast states, J, π, B(E2), magnetic dipole moments, neutron-hole occupation number of the pseudo 13/2+ and 17/2- shells. Discussed seniority scheme. Monopole-optimized effective interactions based on the realistic CD-Bonn nucleon-nucleon potential, within the frameworks of the nucleon-pair approximation (NPA) and shell model (SM). Comparison with experimental values taken mainly from the ENSDF database.

doi: 10.1103/PhysRevC.94.024321
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2016HU09      Phys.Rev. C 93, 064315 (2016)

Y.Huang, Z.G.Xiao, S.J.Zhu, C.Qi, Q.Xu, W.J.Cheng, H.J.Li, L.M.Lyu, R.S.Wang, W.H.Yan, H.Yi, Y.Zhang, Q.M.Chen, C.Y.He, S.P.Hu, C.B.Li, H.W.Li, P.W.Luo, X.G.Wu, Y.H.Wu, Y.Zheng, J.Zhong

High-spin structures in the 129Xe nucleus

NUCLEAR REACTIONS 124Sn(9Be, 4n), E=36 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO) at HI-13 tandem accelerator facility of the CIAE-Beijing. 129Xe; deduced high-spin levels, J, π, band structures, configurations, multipolarities, B(M1)/B(E2), staggering parameter, moments of inertia plots. Systematics of level energies and bands in 125,127,129,131,133Xe. Comparisons with total Routhian surface and quasiparticle triaxial rotor model calculations.

doi: 10.1103/PhysRevC.93.064315
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2016JI12      Phys.Rev. C 94, 044312 (2016)

L.Y.Jia, C.Qi

Generalized-seniority pattern and thermal properties in even Sn isotopes

NUCLEAR STRUCTURE 108,110,112,114,116,118,120,122,124Sn; calculated errors of the generalized-seniority eigen energies for the lowest 50 positive- and 50 negative-parity eigenstates, generalized-seniority mean and fluctuation, and level densities versus the excitation energy, amplitudes of generalized seniority S=2s versus the excitation energy for the lowest 5000 positive- and negative-parity eigenstates, generalized-seniority compositions of the 0+ ground states and first 2+ states. 116Sn; calculated generalized-seniority amplitudes for excited 0+, 0- states, 7+, 7-, 4+, 4-, 10+ and 10- states. 108,116,124Sn; calculated canonical-ensemble mean-energy, entropy, and specific heat versus temperature. Generalized seniority approximation of shell model with realistic interactions.

doi: 10.1103/PhysRevC.94.044312
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2016LI53      Phys.Rev. C 94, 065807 (2016)

K.A.Li, Y.H.Lam, C.Qi, X.D.Tang, N.T.Zhang

β-decay rate of 59Fe in shell burning environment and its influence on the production of 60Fe in a massive star

RADIOACTIVITY 59Fe(β-); calculated B(GT) values for allowed β transitions from low-lying states of 59Fe to 59Co, stellar β-decay rate as a function of stellar temperatures from 0.5-2 GK; deduced impact on the relative abundance of 60Fe from 59Fe(n, γ) in the C-shell burning scenario. Shell model calculations using GXPF1a and GXPF1j interactions. Comparison with experimental logft values taken from NNDC databases.

NUCLEAR STRUCTURE 59Fe; calculated levels, J, π using shell model with GXPF1a and GXPF1j interactions. Comparison with experimental values.

doi: 10.1103/PhysRevC.94.065807
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2016QI05      Phys.Rev. C 94, 014312 (2016)

C.Qi, L.Y.Jia, G.J.Fu

Large-scale shell-model calculations on the spectroscopy of N < 126 Pb isotopes

NUCLEAR STRUCTURE 194,196,198,200,202,204,206Pb; calculated levels, J, π, 0+ states, quadrupole moments, B(E2) of first 2+ states. Large-scale shell-model calculations in the model space including 2p1/2, 1f5/2, 2p3/2, 0i13/2, 1f7/2, and 0h9/2 neutron-hole orbitals. Comparison with experimental values taken from NUDAT2, ENSDF and other NNDC databases.

doi: 10.1103/PhysRevC.94.014312
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2016QI09      Phys.Rev. C 94, 034310 (2016)

C.Qi

Shell-model configuration-interaction description of quadrupole collectivity in Te isotopes

NUCLEAR STRUCTURE 104,106,108,110,112,114,116,118Te; calculated levels, J, π, yrast bands, B(E2) using large-scale shell-model configuration-interaction approach with a realistic interaction. Comparison with experimental data taken from NuDat 2.6.

doi: 10.1103/PhysRevC.94.034310
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2016WU01      Phys.Rev. C 93, 034334 (2016)

Z.Wu, S.A.Changizi, C.Qi

Empirical residual neutron-proton interaction in odd-odd nuclei

ATOMIC MASSES A=10-260; analyzed np interactions from experimental binding energies for odd-A, even-even, odd-odd, and for all known (except N=Z) nuclei; calculated δnp interaction using mac-mic mass formula, shell model mass formulas with parameters taken from literature, and the HFB mass formula. Z=9-131, N=7-219; deduced δnp interaction for all the predicted 2564 odd-odd nuclei from mass formulas. Z=5-103, N=5-153; deduced δnp interaction for all the known 486 odd-odd nuclei from experimental binding energies and nuclear mass formula calculations. Numerical results for individual nuclei are given in two supplementary files.

doi: 10.1103/PhysRevC.93.034334
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2015CH09      Phys.Rev. C 91, 024305 (2015)

S.A.Changizi, C.Qi

Density dependence of the pairing interaction and pairing correlation in unstable nuclei

NUCLEAR STRUCTURE Z=4-104, N=4-160; calculated mean neutron pairing gaps, s(2n), β2, neutron drip lines; deduced mean value of the residual proton-neutron interaction δnp. Experimental pairing gaps compared with four different odd-even staggering (OES) formulas.82,84,86,88Ni; calculated chemical potentials, pairing gaps, and occupancies of 2s1/2 neutron orbital. Hartree-Fock-Bogoliubov (HFB) calculations with the Skyrme force and volume, surface, and mixed pairing forces using HFBTHO and HFBRAD codes.

doi: 10.1103/PhysRevC.91.024305
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2015CH32      Nucl.Phys. A940, 210 (2015)

S.A.Changizi, C.Qi, R.Wyss

Empirical pairing gaps, shell effects, and di-neutron spatial correlation in neutron-rich nuclei

NUCLEAR STRUCTURE Z=1-100; calculated even-N neutron pairing gaps using single j-shell and multi-shell seniority model and using HFB with Skyrme force. Compared with three-point formula with empirical pairing gaps.

doi: 10.1016/j.nuclphysa.2015.04.010
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2015DO04      Phys.Rev. C 91, 061304 (2015)

M.Doncel, T.Back, D.M.Cullen, D.Hodge, C.Qi, B.Cederwall, M.J.Taylor, M.Procter, K.Auranen, T.Grahn, P.T.Greenlees, U.Jakobsson, R.Julin, S.Juutinen, A.Herzan, J.Konki, M.Leino, J.Pakarinen, J.Partanen, P.Peura, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, J.Sorri, S.Stolze, J.Uusitalo

Lifetime measurement of the first excited 2+ state in 112Te

NUCLEAR REACTIONS 58Ni(58Ni, 4p), E=250 MeV; measured Eγ, Iγ, γγ-coin, half-life of the first 2+ state by RDDS method using RITU gas-filled recoil separator, and Differential Plunger DPUNS, Jurogam II array at JYFL accelerator facility. 112Te; deduced level, B(E2) for the first 2+ state. Comparison with shell-model calculations. Systematics of experimental and theoretical values of B(E2) for first 2+ states in 104,106,108,110,112,114,116,118,120,122,124,126,128,130,132Te.

doi: 10.1103/PhysRevC.91.061304
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2015LI15      Eur.Phys.J. A 51, 60 (2015)

H.J.Li, Z.G.Xiao, S.J.Zhu, C.Qi, E.Y.Yeoh, Z.Zhang, R.S.Wang, H.Yi, W.H.Yan, Q.Xu, X.G.Wu, C.Y.He, Y.Zheng, G.S.Li, C.B.Li, H.W.Li, J.J.Liu, S.P.Hu, J.L.Wang, S.H.Yao

Reinvestigation of the collective band structures in odd-odd 138Pm nucleus

NUCLEAR REACTIONS 124Te(19F, 5n), E=99-105 MeV; measured Eγ, Iγ(θ), γγ-coin using Compton-suppressed HPGe, planar HPGe and clover detector; deduced γ transitions, γ transition multipolarity, levels, J, π, high-spin states, rotational bands, yrast band using RADWARE software package for γγ-coin; calculated intrinsic configurations using TRS (total Routhian surface), inertia moments, B(M1)/B(E2), deformation using triaxial quasiparticle-rotor model.

doi: 10.1140/epja/i2015-15060-9
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2015LI17      Phys.Rev. C 91, 054314 (2015)

H.J.Li, Z.G.Xiao, S.J.Zhu, M.Patial, C.Qi, B.Cederwall, Z.Zhang, R.S.Wang, H.Yi, W.H.Yan, W.J.Cheng, Y.Huang, L.M.Lyu, Y.Zhang, X.G.Wu, C.Y.He, Y.Zheng, G.S.Li, C.B.Li, H.W.Li, J.J.Liu, P.W.Luo, S.P.Hu, J.L.Wang, Y.H.Wu

Collective band structures in the 99Tc nucleus

NUCLEAR REACTIONS 96Zr(7Li, 4n), E=35 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO) at HI-13 tandem accelerator of CIAE-Beijing. 99Tc; deduced levels, J, π, multipolarity, rotational bands, configuration, staggering parameter, alignments, B(M1)/B(E2) ratios, large triaxiality at medium to high spins. Total Routhian surface calculations. Comparison with cranked shell model and particle-rotor model calculations. Systematics of band structures in 95,97,99,101,103Tc.

doi: 10.1103/PhysRevC.91.054314
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2015LI24      Phys.Rev. C 92, 014326 (2015)

H.J.Li, B.Cederwall, T.Back, C.Qi, M.Doncel, U.Jakobsson, K.Auranen, S.Bonig, M.C.Drummond, T.Grahn, P.Greenlees, A.Herzan, R.Julin, S.Juutinen, J.Konki, T.Kroll, M.Leino, C.McPeake, D.O'Donnell, R.D.Page, J.Pakarinen, J.Partanen, P.Peura, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, B.Saygi, C.Scholey, J.Sorri, S.Stolze, M.J.Taylor, A.Thornthwaite, J.Uusitalo, Z.G.Xiao

Recoil-decay tagging spectroscopy of 16274W88

NUCLEAR REACTIONS 92Mo(78Kr, 2α), E=380 MeV; measured Eγ, Iγ, Eα, Iα, αγ-, γγ-coin, (recoil)αα-correlations, level half-lives using JUROGAM-II array, RITU separator and GREAT spectrometer at K-130 cyclotron facility of University of Jyvaskyla. Recoil-decay tagging method. 162W; deduced high-spin levels, J, π, multipolarity, yrast band, configuration, Routhians, alignments; calculated total Routhian Surfaces (TRS) using cranked shell model, α-formation probability. Systematics of experimental Routhians and aligned angular momenta in 162,164W and 160Hf. Systematics of energies of yrast bands in 158,160,162,164,166,168W.

RADIOACTIVITY 162W, 166Os(α); measured Eα, Iα, half-lives of 166Os and 162W ground states.

doi: 10.1103/PhysRevC.92.014326
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2015QI01      J.Phys.(London) G42, 045104 (2015)

C.Qi

Theoretical uncertainties of the Duflo-Zuker shell-model mass formulae

NUCLEAR STRUCTURE A=1-300; analyzed available data; deduced parameters for the ten-term DZ10 model and the full DZ33 model. Comparison with experimental data.

doi: 10.1088/0954-3899/42/4/045104
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2015QI02      J.Phys.(London) G42, 345104 (2015)

C.Qi

Theoretical uncertainties of the Duflo-Zuker shell-model mass formulae

NUCLEAR STRUCTURE A<300; calculated differences between experimental and theoretical masses; deduced uncertainties. DZ10 mass model.

doi: 10.1088/0954-3899/42/4/045104
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2015QI05      Rom.J.Phys. 60, 782 (2015)

C.Qi

Seniority and Truncation Schemes for the Nuclear Configuration Interaction Approach

NUCLEAR STRUCTURE Sn, Te, 28Si; calculated wave functions, energy levels, J, π. Interaction shell model.


2015QI07      Phys.Rev. C 92, 051304 (2015)

C.Qi, T.Chen

Exact solution of the pairing problem for spherical and deformed systems

NUCLEAR STRUCTURE 70Ni; calculated relative energies, and correlation energies for the four proton pairs in f7/2 orbital as a function of quadrupole deformation β2, with and without pairing (HF). Solution of nonlinear Richardson equation and derivation of exact solution for pairing Hamiltonians.

doi: 10.1103/PhysRevC.92.051304
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2015WU04      Phys.Rev. C 92, 024306 (2015)

Z.-Y.Wu, C.Qi, R.Wyss, H.-L.Liu

Global calculations of microscopic energies and nuclear deformations: Isospin dependence of the spin-orbit coupling

NUCLEAR STRUCTURE A=16-375, N=8-270; 24,26,28,30,32,34,36,38,40,42,44Si, 44,46,48,50,52,54,56,58,60,62,64,66,68,70,72,74,76Cr, 48,50,52,54,56,58,60,62,64,66,68,70,72,74,76,78,80,82Fe, 62,64,66,68,70,72,74,76,78,80,82,84,86,88,90,92,94,96,98,100,102,104Ge, 66,68,70,72,74,76,78,80,82,84,86,88,90,92,94,96,98,100,102,104,106,108,110,112,114,116Se, 70,72,74,76,78,80,82,84,86,88,90,92,94,96,98,100,102,104,106,108,110,112,114,116,118Kr, 78,80,82,84,86,88,90,92,94,96,98,100,102,104,106,108,110,112,114,116,118,120,122,124Zr, 82,84,86,88,90,92,94,96,98,100,102,104,106,108,110,112,114,116,118,120,122,124,126,128,130,132Mo, 86,88,90,92,94,96,98,100,102,104,106,108,110,112,114,116,118,120,122,124,126,128,130,132,134,136,138Ru, 172,174,176,178,180,182,184,186,188,190,192,194,196,198,200,202,204,206,208,210,212,214,216,218,220,222,224,226,228,230,232,234,236,238,240,242,244,246,248,250,252,254,256,258,260,262,264Hg, 178,180,182,184,186,188,190,192,194,196,198,200,202,204,206,208,210,212,214,216,218,220,222,224,226,228,230,232,234,236,238,240,242,244,246,248,250,252,254,256,258,260,262,264,266Pb; calculated microscopic binding energies and ground-state nuclear deformations β2, γ and β4 for 1850 even-even nuclei. Macroscopic-microscopic framework using three Woods-Saxon parametrizations with different isospin dependencies. Comparison with results of other macroscopic-microscopic mass models. Discussed isospin dependence of spin-orbital force.

doi: 10.1103/PhysRevC.92.024306
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2014DE48      Phys.Rev. C 90, 061303 (2014)

D.S.Delion, R.J.Liotta, C.Qi, R.Wyss

Probing shape coexistence by α decays to 0+ states

RADIOACTIVITY 180,182,184Hg, 202Rn(α); analyzed fine structure of α decays to first excited 0+ states, hindrance factors, spectroscopic factors. Shape coexistence. Two-level model using microscopic description of the α-particle formation amplitude.

doi: 10.1103/PhysRevC.90.061303
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2014GH01      Phys.Rev. C 89, 014301 (2014)

F.Ghazi Moradi, C.Qi, B.Cederwall, A.Atac, T.Back, R.Liotta, M.Doncel, A.Johnson, G.de France, E.Clement, A.Dijon, R.Wadsworth, T.W.Henry, A.J.Nichols, H.Al-Azri, J.Nyberg, A.Gengelbach, T.Huyuk, B.M.Nyako, J.Timar, D.Sohler, Zs.Dombradi, I.Kuti, K.Juhasz, M.Palacz, G.Jaworski, S.M.Lenzi, P.R.John, D.R.Napoli, A.Gottardo, V.Modamio, A.Di Nitto, B.Yilmaz, O.Aktas, E.Ideguchi

Character of particle-hole excitations in γ-ray angular correlation and linear polarization measurements

NUCLEAR REACTIONS 58Ni(40Ca, 4p)94Ru, E=125 MeV; measured Eγ, Iγ, γγ-, γγ(particle)-coin, γγ(θ)(DCO), γγ(linear polarization) using EXOGAM array for γ rays and DIAMANT array for particles at GANIL facility. 94Ru; deduced high-spin levels, J, π, multipolarity, configurations, hindrance factors for E1 transitions. Comparison with large-scale shell-model (LSSM) calculations.

doi: 10.1103/PhysRevC.89.014301
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2014GH02      Phys.Rev. C 89, 044310 (2014)

F.Ghazi Moradi, B.Cederwall, C.Qi, T.Back, A.Atac, R.Liotta, M.Doncel, A.Johnson, G.de France, E.Clement, J.Nyberg, A.Gengelbach, B.M.Nyako, J.Gal, G.Kalinka, J.Molnar, J.Timar, D.Sohler, Zs.Dombradi, I.Kuti, K.Juhasz, D.R.Napoli, A.Gottardo, V.Modamio, R.Wadsworth, T.W.Henry, A.J.Nichols, H.Al-Azri, M.Palacz, E.Ideguchi, O.Aktas, A.Di Nitto, A.Dijon, T.Huyuk, G.Jaworski, P.R.John, B.Yilmaz

Spectroscopy of the neutron-deficient N = 50 nucleus 95Rh

NUCLEAR REACTIONS 58Ni(40Ca, 3p), E=125 MeV; measured Eγ, Iγ, γγ-, nγ-, (particle)γ-coin, γγ(θ)(DCO), γ(linear polarization) using EXOGAM Ge detector array, Neutron Wall and DIAMANT CsI(Tl) detector arrays at GANIL facility. 95Rh; deduced high-spin levels, J, π, multipolarity, configurations, E1 transition strengths and hindrance factors. Comparison with large-scale shell model (LSSM) calculations in fpg and fpgd model spaces.

doi: 10.1103/PhysRevC.89.044310
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2014JI01      Phys.Rev. C 89, 014320 (2014)

H.Jiang, Y.Lei, C.Qi, R.Liotta, R.Wyss, Y.M.Zhao

Magnetic moments of low-lying states in tin isotopes within the nucleon-pair approximation

NUCLEAR STRUCTURE 102,104,106,108,110,112,114,116,118,120,122,124,126,128,130Sn; calculated energies, magnetic moments, and B(E2) of first 2+ states. 101,103,105,107,109,123,125,127,129,131Sn; calculated low-lying yrast levels, J, π, magnetic moment. Spin and orbital angular momentum contributions to magnetic moment. Nucleon-pair approximation (NPA) of shell model using standard multipole-multipole interaction. Comparisons with experimental data.

doi: 10.1103/PhysRevC.89.014320
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2014JI06      Phys.Rev. C 90, 024306 (2014)

L.F.Jiao, Z.H.Sun, Z.X.Xu, F.R.Xu, C.Qi

Correlated-basis method for shell-model calculations

NUCLEAR STRUCTURE 28Si; calculated levels, J, π, wave function overlaps and coefficient distributions, convergence properties of low-lying 0+, 2+, 4+ and 6+ states. 106Sn; calculated convergence properties of low-lying 2+ and 4+ states. Correlated-basis Truncated shell-model calculations.

doi: 10.1103/PhysRevC.90.024306
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2014YU02      Phys.Rev. C 89, 044327 (2014)

C.Yuan, C.Qi, F.Xu, T.Suzuki, T.Otsuka

Mirror energy difference and the structure of loosely bound proton-rich nuclei around A =20

NUCLEAR STRUCTURE 18O, 18Ne; 19O, 19Na; 21O, 21Al; 22F, 22Al; 23Ne, 23Al;, 24Na, 24Al; calculated levels, J, π of loosely bound proton-rich mirror nuclei. 18Ne, 19Na, 20Mg, 21,22,23,24Al, 22,23,24Si; calculated binding energies. 22,23,24Al, 22,23,24Si; calculated low lying levels, J, π. 18Ne, 19Na, 23,24Al; calculated mirror energy differences (MEDs). Shell model Hamiltonian (USD, USDA, USDB) in Woods-Saxon basis. Comparison with experimental data.

RADIOACTIVITY 24Ne(β-), 24Si(β+); calculated B(GT+)/B(GT-) ratios for mirror nuclei. Shell model Hamiltonian (USD, USDA, USDB) in Woods-Saxon basis. Comparison with experimental data.

doi: 10.1103/PhysRevC.89.044327
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2013AN13      Phys.Rev.Lett. 110, 242502 (2013)

A.N.Andreyev, M.Huyse, P.Van Duppen, C.Qi, R.J.Liotta, S.Antalic, D.Ackermann, S.Franchoo, F.P.Hessberger, S.Hofmann, I.Kojouharov, B.Kindler, P.Kuusiniemi, S.R.Lesher, B.Lommel, R.Mann, K.Nishio, R.D.Page, B.Streicher, S.Saro, B.Sulignano, D.Wiseman, R.A.Wyss

Signatures of the Z = 82 Shell Closure in α-Decay Process

RADIOACTIVITY 186Po, 182Pb, 178Hg, 174Pt(α) [from 144Sm(46Ti, X)190Po, E=230 MeV, 190Po(4n)]; measured decay products, Eα, Iα; deduced σ, identification of 186Po, the α-particle formation probabilities.

doi: 10.1103/PhysRevLett.110.242502
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2013BA09      Phys.Rev. C 87, 031306 (2013)

T.Back, C.Qi, B.Cederwall, R.Liotta, F.Ghazi Moradi, A.Johnson, R.Wyss, R.Wadsworth

Transition probabilities near 100Sn and the stability of the N, Z=50 shell closure

NUCLEAR STRUCTURE 102,104,106,108,110,112,114,116,118,120,122,124,126,128,130Sn; calculated B(E2) for first 2+ states. Large-scale shell-model based on monopole-corrected CD-Bonn potential, with inclusion of neutron core excitations. Comparison with experimental data.

doi: 10.1103/PhysRevC.87.031306
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2013JI16      Phys.Rev. C 88, 044332 (2013)

H.Jiang, C.Qi, Y.Lei, R.Liotta, R.Wyss, Y.M.Zhao

Nucleon pair approximation description of the low-lying structure of 108, 109Te and 109I

NUCLEAR STRUCTURE 104,106,108,109Te, 109I; calculated low-lying levels, J, π, ground-state bands of even-even nuclei, ground- and excited bands of odd-A nuclei, B(E2), B(M1), magnetic dipole moments, nucleon-pair wave functions using framework of nucleon pair approximation (NAP) of the nuclear shell model. Weak coupling and residual quadrupole-quadrupole interaction. Comparison with experimental data.

doi: 10.1103/PhysRevC.88.044332
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2013PR01      Phys.Rev. C 87, 014308 (2013)

M.G.Procter, D.M.Cullen, M.J.Taylor, J.Pakarinen, K.Auranen, T.Back, T.Braunroth, B.Cederwall, A.Dewald, T.Grahn, P.T.Greenlees, U.Jakobsson, R.Julin, S.Juutinen, A.Herzan, J.Konki, M.Leino, R.Liotta, J.Partanen, P.Peura, P.Rahkila, P.Ruotsalainen, M.Sandelius, J.Saren, C.Scholey, J.Sorri, S.Stolze, J.Uusitalo, C.Qi

Isomer-tagged differential-plunger measurements in 54 113Xe

NUCLEAR REACTIONS 58Ni(58Ni, n2p), E=210 MeV; measured Eγ, Iγ, delayed and prompt γ spectra, γγ-coin, level half-lives by γ(t) and recoil distance Doppler-shift method using a plunger device DPUNS and JUROGAM-II array. Recoil-isomer tagging method. 113Xe; deduced high-spin levels, J, π, isomer, bands, B(M2), B(E2), branching ratio. B(M2), B(E2) and level systematics of Sn, Te, Xe isotopes.

doi: 10.1103/PhysRevC.87.014308
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2013SU18      Phys.Lett. B 724, 247 (2013)

Z.-X.Su, C.Qi

Shell evolution and its indication on the isospin dependence of the spin-orbit splitting

NUCLEAR STRUCTURE 20,22,24O, 32Mg, 34,42Si, 64Cr, 66Fe; analyzed energy levels, J, πi; calculated potential energy surface (PES); deduced evolution of single-particle energies, nuclear shells, Woods-Saxon potential parameters.

doi: 10.1016/j.physletb.2013.06.018
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2012BA47      Phys.Scr. T150, 014003 (2012)

T.Back, C.Qi, B.Cederwall, R.Liotta, F.Ghazi Moradi, A.Johnson, R.Wyss, R.Wadsworth

The B(E2;0+gs → 2+) systematics of Sn and Te isotopes in light of data in the light Sn region including a recent measurement in 108Te using the combined recoil-decay-tagging-recoil-distance Doppler technique

COMPILATION 108,112,114,116,118,120,122,124,126,128,130Te, 106,108,110,112,114,116,118,120,122,124,126,128,130Sn; compiled B(E2) data; deduced systematics.

doi: 10.1088/0031-8949/2012/T150/014003
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2012PR10      Phys.Rev. C 86, 034308 (2012)

M.G.Procter, D.M.Cullen, C.Scholey, P.Ruotsalainen, L.Angus, T.Back, B.Cederwall, A.Dewald, C.Fransen, T.Grahn, P.T.Greenlees, M.Hackstein, U.Jakobsson, P.M.Jones, R.Julin, S.Juutinen, S.Ketelhut, M.Leino, R.Liotta, N.M.Lumley, P.J.R.Mason, P.Nieminen, M.Nyman, J.Pakarinen, T.Pissulla, P.Peura, P.Rahkila, J.Revill, S.V.Rigby, W.Rother, M.Sandzelius, J.Saren, J.Sorri, M.J.Taylor, J.Uusitalo, P.Wady, C.Qi, F.R.Xu

Electromagnetic transition strengths in 52109Te

NUCLEAR REACTIONS 58Ni(54Fe, n2p), E=206 MeV; measured Eγ, Iγ, γγ-, (particle)γ-, (recoil)γ-coin, level half-lives using the recoil distance Doppler-shift method using PRE-JUROGAM II spectrometer, RITU and GREAT focal-plane spectrometer at Jyvaskyla. Recoil-decay tagging method. 109Te; deduced levels, J, π, bands, multipolarity, B(E2), B(M1). Comparison of experimental B(E2) for ground-state transitions in 108,109Te, 109I with theory. Systematics of 11/2- states in N=57-81 Te isotopes, first 2+ states in N=54-82 Te, h11/2 bands in N=57-63 Te, and ground-state bands in N=54-64 even A Te nuclei. Comparison of levels, J, π, B(E2), B(M1) values with shell model calculations.

NUCLEAR REACTIONS 58Ni(54Fe, X)105In/106Sn/108Sn/108Sb/109Sb/109Te/110Te, E=206 MeV; measured yields from ground-state transitions in (recoil)γγ-coin spectra.

doi: 10.1103/PhysRevC.86.034308
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2012QI03      Phys.Rev. C 85, 011303 (2012)

C.Qi, D.S.Delion, R.J.Liotta, R.Wyss

Effects of formation properties in one-proton radioactivity

RADIOACTIVITY 109I, 112,113Cs, 117La, 121Pr, 130,131Eu, 135Tb, 140,141,141mHo, 144,145,146,146m,147,147mTm, 150,150m,151,151mLu, 155,156,156m,157Ta, 159m,160,161,161mRe, 164,165m,166,166m,167,167mIr, 170,170m,171,171mAu, 176,177,177mTl, 185Bi(p); calculated T1/2, proton formation probabilities. Fitting parameter from microscopic description of the decay process. Deformation property of the parent nucleus. Comparison with experimental data.

doi: 10.1103/PhysRevC.85.011303
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2012QI09      Nucl.Phys. A884-885, 21 (2012)

C.Qi, Z.X.Xu, R.J.Liotta

Analytic proof of partial conservation of seniority in j=9/2 shells

doi: 10.1016/j.nuclphysa.2012.04.007
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2012QI12      Phys.Scr. T150, 014031 (2012)

C.Qi, J.Blomqvist, T.Back, B.Cederwall, A.Johnson, R.J.Liotta, R.Wyss

Coherence features of the spin-aligned neutron-proton pair coupling scheme

NUCLEAR STRUCTURE 92Pd, 96Cd; calculated wave functions, ground and low-lying yrast states. The seniority scheme.

doi: 10.1088/0031-8949/2012/T150/014031
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2012QI13      Prog.Theor.Phys.(Kyoto), Suppl. 196, 414 (2012)

C.Qi

Spin-Aligned Neutron-Proton Pair Coupling Scheme

NUCLEAR STRUCTURE 92Pd, 96Cd; calculated eight-particle systems, level scheme, J, π. Multistep shell model.

doi: 10.1143/PTPS.196.414
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2012QI16      Phys.Rev. C 86, 044323 (2012)

C.Qi, Z.X.Xu

Monopole-optimized effective interaction for tin isotopes

NUCLEAR STRUCTURE 101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,127,129,131,132Sn; calculated level energies, magnetic dipole moments using systematic configuration-interaction shell-model with a global optimized effective interaction. Spin inversion between 101Sn and 103Sn. Comparison with experimental data.

doi: 10.1103/PhysRevC.86.044323
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2012QI18      J.Phys.:Conf.Ser. 381, 012106 (2012)

C.Qi, R.J.Liotta, R.Wyss

Spin-aligned neutron-proton pair coupling in the era of large scale computing

NUCLEAR STRUCTURE 92Pd, 96Cd; calculated 0g9/2 interaction matrix, average number of isoscalar interacting pairs vs total angular momentum of low-lying yrast states using shell model.

doi: 10.1088/1742-6596/381/1/012106
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2012QI19      J.Phys.:Conf.Ser. 381, 012131 (2012)

C.Qi, R.J.Liotta, R.Wyss

Generalization of the Geiger-Nuttall law and alpha clustering in heavy nuclei

COMPILATION Z=78-118(α); compiled even-even nuclei T1/2 vs Qα and T1/2 vs combination of charge, mass and Q. Suggested Geiger-Nuttall-like law using the newly introduced variables.

doi: 10.1088/1742-6596/381/1/012131
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2012XU01      Nucl.Phys. A877, 51 (2012)

Z.X.Xu, C.Qi, J.Blomqvist, R.J.Liotta, R.Wyss

Multistep shell model description of spin-aligned neutron-proton pair coupling

NUCLEAR STRUCTURE 94Ag; calculated levels, J, π, configuration of states, δ using spin-aligned neutron-proton par scheme within multistep shell model using 0g9/2 shell.

doi: 10.1016/j.nuclphysa.2011.12.005
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2012YU04      Nucl.Phys. A883, 25 (2012)

C.X.Yuan, C.Qi, F.R.Xu

Shell evolution in neutron-rich carbon isotopes: Unexpected enhanced role of neutron-neutron correlation

NUCLEAR STRUCTURE 16,18,20,22,24C, 17,19,21,23,25N, 18,20,22,24,26O; calculated E(2+), ESPE (effective single-particle energy). Compared with data. 16,18,20C; calculated quadrupole moments. Compared with other calculations and data. Full shell-model diagonalization.

doi: 10.1016/j.nuclphysa.2012.04.003
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2011BA37      Phys.Rev. C 84, 041306 (2011)

T.Back, C.Qi, F.Ghazi Moradi, B.Cederwall, A.Johnson, R.Liotta, R.Wyss, H.Al-Azri, D.Bloor, T.Brock, R.Wadsworth, T.Grahn, P.T.Greenlees, K.Hauschild, A.Herzan, U.Jacobsson, P.M.Jones, R.Julin, S.Juutinen, S.Ketelhut, M.Leino, A.Lopez-Martens, P.Nieminen, P.Peura, P.Rahkila, S.Rinta-Antila, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, J.Sorri, J.Uusitalo, S.Go, E.Ideguchi, D.M.Cullen, M.G.Procter, T.Braunroth, A.Dewald, C.Fransen, M.Hackstein, J.Litzinger, W.Rother

Lifetime measurement of the first excited 2+ state in 108Te

NUCLEAR REACTIONS 54Fe(58Ni, 2n2p), E=245 MeV; measured Eγ, Iγ, recoil-distance Doppler shift. 108Te; deduced levels, J, π, half-life of first 2+ state, B(E2). Recoil decay tagging (RDT) technique in combination with distance Doppler shift using the Cologne differential plunger and JUROGAM II array. Systematics of B(E2) values for even-A Te nuclei from N=52-80. Comparison with shell model calculations.

doi: 10.1103/PhysRevC.84.041306
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2011CE01      Nature(London) 469, 68 (2011)

B.Cederwall, F.Ghazi Moradi, T.Back, A.Johnson, J.Blomqvist, E.Clement, G.de France, R.Wadsworth, K.Andgren, K.Lagergren, A.Dijon, G.Jaworski, R.Liotta, C.Qi, B.M.Nyako, J.Nyberg, M.Palacz, H.Al-Azri, A.Algora, G.de Angelis, A.Atac, S.Bhattacharyya, T.Brock, J.R.Brown, P.Davies, A.Di Nitto, Zs.Dombradi, A.Gadea, J.Gal, B.Hadinia, F.Johnston-Theasby, P.Joshi, K.Juhasz, R.Julin, A.Jungclaus, G.Kalinka, S.O.Kara, A.Khaplanov, J.Kownacki, G.La Rana, S.M.Lenzi, J.Molnar, R.Moro, D.R.Napoli, B.S.Nara Singh, A.Persson, F.Recchia, M.Sandzelius, J.-N.Scheurer, G.Sletten, D.Sohler, P.-A.Soderstrom, M.J.Taylor, J.Timar, J.J.Valiente-Dobon, E.Vardaci, S.Williams

Evidence for a spin-aligned neutron-proton paired phase from the level structure of 92Pd

NUCLEAR REACTIONS 58Ni(36Ar, 2n), (36Ar, 2np), (36Ar, n2p), E=111 MeV; measured Eα, Iα, Ep, Ip, Eγ, Iγ, particle-γ coin. 92Pd; deduced level energies, J, π, spin-aligned, isoscalar neutron-proton coupling scheme. Comparison with shell-model calculations.

NUCLEAR STRUCTURE 92,94,96Pd; calculated ground-state wavefunctions, level energies, J, π, B(E2). Nuclear shell model.

doi: 10.1038/nature09644 Letter
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2011GH08      Phys.Rev. C 84, 064312 (2011)

F.Ghazi Moradi, T.Back, B.Cederwall, M.Sandzelius, A.Atac, A.Johnson, C.Qi, R.Liotta, B.Hadinia, K.Andgren, A.Khaplanov, R.Wyss, S.Eeckhaudt, T.Grahn, P.T.Greenlees, P.M.Jones, R.Julin, S.Juutinen, S.Ketelhut, M.Leino, M.Nyman, P.Rahkila, J.Saren, C.Scholey, J.Sorri, J.Uusitalo, E.Ganioglu, J.Thomson, D.T.Joss, R.D.Page, S.Erturk, J.Simpson, M.B.Gomez Hornillos, L.Bianco

High-spin study of 162Ta

NUCLEAR REACTIONS 106Cd(60Ni, n3p), E=270 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO). 162Ta; deduced levels, J, π, experimental Routhians, rotational bands, energy staggering, configurations, B(M1)/B(E2) ratios. JUROGAM array and Gamma Recoil Electron Alpha Tagging (GREAT) spectrometer. Total Routhian surface calculations. Systematics of energy staggering of signature partners for bands in 158,160,162Tm, 160,162,164Lu, 162,164,166Ta.

doi: 10.1103/PhysRevC.84.064312
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2011PR12      Phys.Lett. B 704, 118 (2011)

M.G.Procter, D.M.Cullen, C.Scholey, P.Ruotsalainen, L.Angus, T.Back, B.Cederwall, A.Dewald, C.Fransen, T.Grahn, P.T.Greenlees, M.Hackstein, U.Jakobsson, P.M.Jones, R.Julin, S.Juutinen, S.Ketelhut, M.Leino, R.Liotta, N.M.Lumley, P.J.R.Mason, P.Nieminen, M.Nyman, J.Pakarinen, T.Pissulla, P.Peura, P.Rahkila, J.Revill, S.V.Rigby, W.Rother, M.Sandzelius, J.Saren, J.Sorri, M.J.Taylor, J.Uusitalo, P.Wady, C.Qi, F.R.Xu

Anomalous transition strength in the proton-unbound nucleus 10953I56

NUCLEAR REACTIONS 58Ni(54Fe, 2np)109I, E=206 MeV; measured reaction products, Eγ, Iγ; deduced σ, lifetime or T1/2 for the first excited state. Comparison with theoretical calculations, Recoil distance Doppler-shift method.

doi: 10.1016/j.physletb.2011.09.012
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2011QI02      Phys.Rev. C 83, 014307 (2011)

C.Qi

Partial conservation of seniority in the j = 9/2 shell: Analytic and numerical studies

doi: 10.1103/PhysRevC.83.014307
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2011QI08      Phys.Rev. C 84, 021301 (2011)

C.Qi, J.Blomqvist, T.Back, B.Cederwall, A.Johnson, R.J.Liotta, R.Wyss

Spin-aligned neutron-proton pair mode in atomic nuclei

NUCLEAR STRUCTURE 92Pd; calculated levels, J, π, B(E2), yrast states, isoscalar neutron-proton pair mode coupling scheme. Shell Model. Comparison with systematics of yrast states for 94,96Pd, 96Cd, 94Ag, and with experimental data

doi: 10.1103/PhysRevC.84.021301
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2011WA27      Nucl.Phys. A865, 57 (2011)

X.B.Wang, C.Qi, F.R.Xu

Isovector channel of quark-meson-coupling model and its effect on symmetry energy

NUCLEAR STRUCTURE 208Pb; calculated neutron, proton density, radius, symmetry energy using quark-meson coupling model, Skyrme-Hartree-Fock with spin exchange.

doi: 10.1016/j.nuclphysa.2011.07.001
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2011XU03      Nucl.Phys. A850, 53 (2011)

Z.X.Xu, R.J.Liotta, C.Qi, T.Roger, P.Roussel-Chomaz, H.Savajols, R.Wyss

Analysis of the unbound spectrum of 12Li

NUCLEAR STRUCTURE 12Li; calculated levels, J, π using a multi-step shell model. Comparison with data.

doi: 10.1016/j.nuclphysa.2010.12.003
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2010QI01      Phys.Rev. C 81, 034318 (2010)

C.Qi

Energy expressions for n=3 and 4 systems in a single-j shell

NUCLEAR STRUCTURE 43Sc, 43Ti, 52Fe, 96Cd; calculated expansion coefficients as function of spin of yrast states; deduced analytical expressions for energies of the yrast states for N ≈ Z from a decomposition of the angular momentum in the framework of multistep shell model.

doi: 10.1103/PhysRevC.81.034318
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2010QI04      Phys.Rev. C 81, 064319 (2010)

C.Qi, A.N.Andreyev, M.Huyse, R.J.Liotta, P.Van Duppen, R.A.Wyss

Abrupt changes in α-decay systematics as a manifestation of collective nuclear modes

doi: 10.1103/PhysRevC.81.064319
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2010QI05      Phys.Rev. C 82, 014304 (2010)

C.Qi, X.B.Wang, Z.X.Xu, R.J.Liotta, R.Wyss, F.R.Xu

Alternate proof of the Rowe-Rosensteel proposition and seniority conservation

doi: 10.1103/PhysRevC.82.014304
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2010XU04      Phys.Rev. C 81, 054319 (2010)

C.Xu, C.Qi, R.J.Liotta, R.Wyss, S.M.Wang, F.R.Xu, D.X.Jiang

Molecular structure of highly excited resonant states in 24Mg and the corresponding 8Be+16O and 12C+12C decays

NUCLEAR REACTIONS 12C(12C, X)24Mg, E not given; calculated excitation energies, J, π, widths, and 8Be+16O decays of 24Mg resonances using cluster model. Comparison with experimental data.

doi: 10.1103/PhysRevC.81.054319
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2009QI05      Phys.Rev.Lett. 103, 072501 (2009)

C.Qi, F.R.Xu, R.J.Liotta, R.Wyss

Universal Decay Law in Charged-Particle Emission and Exotic Cluster Radioactivity

doi: 10.1103/PhysRevLett.103.072501
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2009QI07      Phys.Rev. C 80, 044326 (2009)

C.Qi, F.R.Xu, R.J.Liotta, R.Wyss, M.Y.Zhang, C.Asawatangtrakuldee, D.Hu

Microscopic mechanism of charged-particle radioactivity and generalization of the Geiger-Nuttall law

RADIOACTIVITY 106,108Te, 110,112Xe, 114Ba(α); 110,112Xe, 114Ba, 154Dy, 158Yb, 160,162Hf, 162,166W, 166,168Os, 166,168,170,172Pt, 172,174,176,180Hg, 178,180,184Pb, 202,218,220,222,224,226Ra, 220,222,224,226Th, 222,224,226,228U, 228Pu(12C); 220,222Rn, 220,222,224,226Ra, 222,224,226,228,230Th, 226,228,230U, 228Pu(14C); 112Xe, 114Ba, 162Hf, 166Os, 168Pt, 172Hg, 224,226Th, 226,228U, 228Pu(16O); 226,228,230Th, 228U(18O); 226Ra, 228,230Th(20O); 230,232U, 232Pu(22Ne); 228,230,232Th, 230,232,234U, 234Pu(24Ne); 232U, 232,234Pu(26Mg); 232,234U, 234,236,238Pu, 238Cm(28Mg); 238Cm(30Si); 236,238Pu, 238,240Cm(32Si); 238,240Pu, 240,242Cm(34Si); Z=50-120, even Z, N=54-176, odd N(α); Z=50-115, N=55-175(12C); Z=85-115, N=115-175(14C); A=100-290(α), (12C), (14C); Z=88-116, N=130-176(24Ne); calculated half-lives using universal decay law (UDL). Generalization of the Geiger-Nuttall law. Comparison with experimental data.

doi: 10.1103/PhysRevC.80.044326
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2009YU07      Chin.Phys.C 33, Supplement 1, 55 (2009)

C.-X.Yuan, C.Qi, F.-R.Xu

Shell-model studies of the N = 14 and 16 shell closures in neutron-rich nuclei

NUCLEAR STRUCTURE 14,16,18,20,22Be, 16,18,20,21,22,24C, 18,20,22,23,24,26O, 20,22,24,26,28Ne; calculated energy levels, J, π, B(E2). Shell model with WTB interaction. Comparison with experimental data.

doi: 10.1088/1674-1137/33/S1/018
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2009ZH41      Chin.Phys.C 33, 107 (2009)

S.-J.Zheng, F.-R.Xu, C.-X.Yuan, C.Qi

Alignments in the nobelium isotopes

NUCLEAR STRUCTURE 248,250,252,254No; calculated total routhian surfaces; deduced coexistence of normal deformed and superdeformed states, kinematics moments of inertia.

doi: 10.1088/1674-1137/33/2/006
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2009ZH44      Chin.Phys.C 33, Supplement 1, 9 (2009)

J.-Y.Zhu, C.Qi, M.-X.Liu, X.Cui, F.-R.Xu

Shape transitions in proton-rich Ho and Tm isotopes

NUCLEAR STRUCTURE 143Ho, 145Tm, 70,72,74Kr, 142,144Er; calculated total routhian surfaces, ground-state deformations; deduced sudden change in the ground state.

doi: 10.1088/1674-1137/33/S1/003
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2008QI01      Nucl.Phys. A800, 47 (2008)

C.Qi, F.R.Xu

Shell-model study of spectroscopies and isospin structures in odd-odd N = Z nuclei employing realistic NN interaction

NUCLEAR STRUCTURE 46V, 50Mn; calculated level energies, J, π, B(E2), B(M1) with microscopic shell model and comparison with data.

doi: 10.1016/j.nuclphysa.2007.12.001
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2008QI04      Int.J.Mod.Phys. E17, 1955 (2008)

C.Qi, R.Z.Du, Y.Gao, J.C.Pei, J.Y.Zhu, F.R.Xu

Proton resonance properties in light nuclei with mean-field type potentials

NUCLEAR STRUCTURE 11B, 11C, 11N, 14N, 14O, 15,16F, 18,19Na; calculated energies, J, π, Q-values for proton resonances using a mean-field model.

doi: 10.1142/S0218301308010933
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2008QI05      Nucl.Phys. A814, 48 (2008)

C.Qi, F.R.Xu

Isospin asymmetry effects in mirror nuclei with modern charge-dependent NN potential

NUCLEAR STRUCTURE 45Ti, 45,47V, 47,49Cr, 49,51Mn, 51Fe; calculated level energies, J, π, B(E2), B(M1), B(GT) with microscopic shell model and comparison with data.

doi: 10.1016/j.nuclphysa.20087.10.003
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2006QI02      Int.J.Mod.Phys. E15, 1563 (2006)

C.Qi, F.R.Xu

Isospin symmetry and Gamow-Teller transition strengths in mirror nuclei

NUCLEAR STRUCTURE 46Ti, 46,50Cr, 50Fe; calculated Gamow-Teller transition strengths.

doi: 10.1142/S0218301306005149
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