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NSR database version of April 11, 2024.

Search: Author = J.C.Pei

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2024GU08      Phys.Lett. B 851, 138578 (2024)

D.Guan, J.Pei

High quality microscopic nuclear masses of superheavy nuclei

NUCLEAR STRUCTURE 287,289,291Mc, 290,292Lv, 291,293Ts, 294Og; calculated Q-values. Comparison with available data.

RADIOACTIVITY 297119, 293Ts, 289Mc, 285Nh(α), 296119, 292Ts, 288Mc, 284Nh(α), 295119, 291Ts, 287Mc, 283Nh(α), 294119, 290Ts, 286Mc, 282Nh(α), 293119, 289Ts, 285Mc, 281Nh(α); calculated Q-values of possible α-decay chains from Z=119 nuclei in future experiments. Comparison with available data.

doi: 10.1016/j.physletb.2024.138578
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2023CH03      Chin.Phys.Lett. 40, 012401 (2023)

J.Chen, J.Pei, Y.Qiang, J.Chi

Fission Properties of Neutron-Rich Nuclei around the End Point of r-Process

RADIOACTIVITY 278,286Cf(SF); calculated fission barriers and potential energy surfaces are obtained by constrained static Skyrme Hartree-Fock-BCS, Fission fragments with dynamical time-dependent Hartree-Fock+BCS.

doi: 10.1088/0256-307X/40/1/012401
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2023CH14      Nucl.Phys. A1032, 122626 (2023)

J.H.Chi, Y.Qiang, C.Y.Gao, J.C.Pei

Role of hexadecapole deformation in fission potential energy surfaces of 240Pu

NUCLEAR STRUCTURE 240Pu; calculated microscopic multi-dimensional potential energy surfaces for descriptions of fission within the multipole deformation-constrained Skyrme Hartree-Fock+BCS (SHF-BCS); deduced importance of hexadecapole deformation at large deformations, multiple solutions and discontinuities in potential energy surfaces.

doi: 10.1016/j.nuclphysa.2023.122626
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2023CH55      Phys.Rev. C 108, 065806 (2023)

M.Chen, D.Guan, Ch.Jiang, J.Pei

Speed of sound and phase transitions in neutron stars indicated by the thick neutron skin of 208Pb

doi: 10.1103/PhysRevC.108.065806
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2023JI05      Phys.Rev. C 107, 044308 (2023)

C.Jiang, J.Pei

Quantum computing of the pairing Hamiltonian at finite temperature

doi: 10.1103/PhysRevC.107.044308
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2022CH17      Phys.Rev. C 105, 034315 (2022)

Q.Z.Chai, Y.Qiang, J.C.Pei

Correlations between nuclear landscape boundaries and neutron-rich r-process abundances

NUCLEAR STRUCTURE 120,122,124,126,128,130,132,134,136,138,140,142,144,146,148,150,152,154,156,158,160,162,164,166,168,170,172,174,176,178Sn; calculated S(2n), neutron pairing gap. 39Na; calculated S(2n) using seven different Skyrme-type forces. Comparison to available experimental data. Calculated r-process abundances for A=78-24 with SKYNET using reaction rates calculated with TALYS. Skyrme Hartree-Fock-Bogoliubov (HFB) framework.

doi: 10.1103/PhysRevC.105.034315
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2022MA45      Phys.Rev. C 106, 064316 (2022)

L.Ma, H.B.Yang, Z.Y.Zhang, J.C.Pei, M.H.Huang, M.M.Zhang, C.Y.Qiao, X.J.Bao, Y.L.Tian, C.L.Yang, Y.S.Wang, Z.Zhao, X.Y.Huang, S.Y.Xu, W.X.Huang, Z.Liu, X.H.Zhou, Z.G.Gan

Attempts to produce new americium isotopes near N=126

NUCLEAR REACTIONS 191,193Ir(40Ar, xn)231Am*/233Am*, E=190-204 MeV; measured reaction products, Eα, (recoils)α-α-α correlated events, using SHANS gas-filled recoil separator, 16 position-sensitive Si-strip detectors (PSSDs) for evaporation residues, and eight side silicon detectors (SSDs) for α particles at the HRIFL-Lanzhou facility. 226,227,228Am; no evidence found for the detection of these nuclides, with upper limits of cross sections determined for the production of the compound nuclei of 231Am and 233Am; discussed nonobservation of new americium isotopes in terms of reduced survival probabilities of compound nuclei 231Am and 233Am due to their low fission barriers at high excitations.

NUCLEAR STRUCTURE 226,227,228,229Am; calculated excitation functions for the production of these nuclides in 191,193Ir(40Ar, xn) using the statistical model code HIVAP. 230,231,232,233,234,235,236Am; evaluated shell correction energies and fission barriers from FRDM2012, KTUY2005, and WS2010. 226U, 227Np, 231,233Am; calculated fission barrier heights as functions of excitation energy and quadrupole deformation parameter β2 using microscopic finite-temperature Skyrme Hartree-Fock+BCS theory.

doi: 10.1103/PhysRevC.106.034316
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2022QI04      Phys.Rev. C 106, 014608 (2022)

C.Y.Qiao, J.C.Pei

Modeling survival probabilities of superheavy nuclei at high excitation energies

NUCLEAR STRUCTURE 210Po; calculated fission widths of compound nuclei depending on the excitation energy, first-chance survival probability. 254,256,258,260No, 288,290,292,290Fl, 294,296,298,300Og, 298,300,302,304120; calculated first-chance survival probabilities and decay width of the compound nuclei depending on the excitation energy, curvatures around the equilibrium point, fission barrier heights and the barrier saddle point as a function of excitation energy. Skyrme-Hartree-Fock+BCS at finite temperatures. Survival probabilities derived using Bohr-Wheeler statistical model. Comparison to available experimental data.

doi: 10.1103/PhysRevC.106.014608
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2022WA26      Phys.Rev. C 106, L021304 (2022)

Z.A.Wang, J.C.Pei, Y.J.Chen, C.Y.Qiao, F.R.Xu, Z.G.Ge, N.C.Shu

Bayesian approach to heterogeneous data fusion of imperfect fission yields for augmented evaluations

NUCLEAR REACTIONS 238U(n, F), E<20 MeV; analyzed experimental data; calculated cumulative fission yields of 99Mo, 135Xe, 140Ba, 147Nd fragments, independent fission yields. Bayesian neural networks (BNNs) algorithm for machine learning.

doi: 10.1103/PhysRevC.106.L021304
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2021CH17      Phys.Rev. C 103, L031302 (2021)

J.Chen, S.M.Wang, H.T.Fortune, J.L.Lou, Y.L.Ye, Z.H.Li, N.Michel, J.G.Li, C.X.Yuan, Y.C.Ge, Q.T.Li, H.Hua, D.X.Jiang, X.F.Yang, D.Y.Pang, F.R.Xu, W.Zuo, J.C.Pei, J.Li, W.Jiang, Y.L.Sun, H.L.Zang, N.Aoi, H.J.Ong, E.Ideguchi, Y.Ayyad, K.Hatanaka, D.T.Tran, D.Bazin, J.Lee, Y.N.Zhang, J.Wu, H.N.Liu, C.Wen, T.Yamamoto, M.Tanaka, T.Suzuki

Observation of the near-threshold intruder 0- resonance in 12Be

NUCLEAR REACTIONS 2H(11Be, p)12Be, E=26.9 MeV/nucleon; measured E(p), I(p), σ(θ) using two parallel-plate avalanche counters (PPACs), and a set of annular double-sided silicon detectors (ADSSDs) at the RCNP, Osaka University. 12Be; deduced missing-mass spectra of 12Be unbound states, levels, J, π, a 0- resonance just above S(n), decay width. DWBA analysis. Comparison with Gamow coupled-channel and Gamow shell-model calculations.

doi: 10.1103/PhysRevC.103.L031302
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetE2690. Data from this article have been entered in the XUNDL database. For more information, click here.

2021QI04      Phys.Rev. C 103, 034621 (2021)

C.Y.Qiao, J.C.Pei, Z.A.Wang, Y.Qiang, Y.J.Chen, N.C.Shu, Z.G.Ge

Bayesian evaluation of charge yields of fission fragments of 239U

NUCLEAR REACTIONS 232,233Th, 239Pu(n, F), E=14 MeV; 239Pu, 244Cm(n, F), E=0.5 MeV; 255Fm(n, F), E=0.025 eV; analyzed one-layer and two-layer Bayesian neural network (BNN) learning results of charge yields taken from JENDL. 235U(n, F), E=0.025 eV and 0.5, 14 MeV; predicted BNN fission charge yields. 238U(n, F)239U*, E=0.5 MeV; calculated and evaluated BNN fission charge yields. Double-layered Bayesian neural network (BNN) to learn and predict charge yields of fission fragments; deduced better performance of double-layer network better than that of the single-layer network with same number of neurons. Comparison with experimental data.

doi: 10.1103/PhysRevC.103.034621
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2021QI05      Phys.Rev. C 103, L031304 (2021)

Y.Qiang, J.C.Pei, P.D.Stevenson

Fission dynamics of compound nuclei: Pairing versus fluctuations

NUCLEAR REACTIONS 239Pu(n, F)240Pu*, E*=10.6, 16.1, 53.2 MeV; calculated detailed fission observables of compound 240Pu with TD-BCS plus thermal fluctuations: fission evolution time, mass of heavy fragments, proton and neutron numbers of heavy and light fragments, excitation energies of heavy and light fragments, total excitation energies of fragments, total kinetic energies TKE, the quadrupole and octupole deformations before scission, neutron and proton pairing energies. Time-dependent Hartree-Fock+BCS approach.

doi: 10.1103/PhysRevC.103.L031304
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2021QI08      Phys.Rev. C 104, 054604 (2021)

Y.Qiang, J.C.Pei

Energy and pairing dependence of dissipation in real-time fission dynamics

RADIOACTIVITY 258Fm(SF); calculated nuclear potentials, dissipated energies, fission evolution time to scission, scission deformations Q20, total kinetic energy (TKE), total excitation energies of fragments (TXE), prescission dissipated energies, pre- and total-dissipated energies, final intrinsic energies as functions of temperature and quadrupole potential Q20. Microscopic study of dissipation in fission dynamical evolutions with the time-dependent Hartree-Fock+BCS method.

doi: 10.1103/PhysRevC.104.054604
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2021WA52      Phys.Rev. C 104, 064608 (2021)

Z.-A.Wang, J.Pei

Optimizing multilayer Bayesian neural networks for evaluation of fission yields

NUCLEAR REACTIONS 235U(n, F), E=0.5, 3.6, 4.49, 14 MeV; 229Th, 242Pu(n, F), E=0.01 MeV; 234U(n, F), E=14 MeV; 238U(n, F), E=0.5 MeV; analyzed and evaluated experimental data for induced fission yields using multilayer Bayesian neural networks (BNN) techniques with learning performances using different activation functions such as sine, tanh, sigmoid, and ReLU to improve their performance for evaluations of fission yields. 238U(n, F)239U*; evaluated fission yields of compound nucleus with experimental data taken from GEF and ENDF libraries using double-layer BNN evaluations without and with penalty on negative values.

doi: 10.1103/PhysRevC.104.064608
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2020BE28      J.Phys.(London) G47, 113002 (2020)

M.Bender, R.Bernard, G.Bertsch, S.Chiba, J.Dobaczewski, N.Dubray, S.A.Giuliani, K.Hagino, D.Lacroix, Z.Li, P.Magierski, J.Maruhn, W.Nazarewicz, J.Pei, S.Peru, N.Pillet, J.Randrup, D.Regnier, P.G.Reinhard, L.M.Robledo, W.Ryssens, J.Sadhukhan, G.Scamps, N.Schunck, C.Simenel, J.Skalski, I.Stetcu, P.Stevenson, S.Umar, M.Verriere, D.Vretenar, M.Warda, S.Aberg

Future of nuclear fission theory

doi: 10.1088/1361-6471/abab4f
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2020CH21      Phys.Rev. C 102, 014312 (2020)

Q.Z.Chai, J.C.Pei, N.Fei, D.W.Guan

Constraints on the neutron drip line with the newly observed 39Na

NUCLEAR STRUCTURE 22,24,26,28,30O, 25,27,29,31,33F, 28,30,32,34,36,38Ne, 29,31,33,35,37,39,41Na, 30,32,34,36,38,40,42,44,46Mg, 33,35,37,39,41,43,45,47,49Al; calculated S(2n). 29,31F, 37,39Na; calculated proton and neutron density distributions. 30Ne, 31,39Na, 32,40Mg, 41Al; calculated deformation-potential energy curves for N=20 and 28 drip-line nuclei. Hartree-Fock-Bogoliubov (HFB) calculations using various Skyrme interactions, adopting the extended SkM*ext1 parametrization. Comparison with available experimental data. Relevance to experimental explorations of drip-line nuclei in the forthcoming Facility for Rare Isotope Beams (FRIB) and other rare-isotope beam facilities, such as recently observed weakly bound 39Na. 39Na; discussed deformed halo properties.

doi: 10.1103/PhysRevC.102.014312
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2019HE08      Phys.Rev. C 99, 054318 (2019)

C.Q.He, J.C.Pei, Y.Qiang, N.Fei

Continuum damping effects in nuclear collisions associated with twisted boundary conditions

NUCLEAR REACTIONS 24Mg(24Mg, X)48Cr*, E(cm)=29, 49, 69 MeV; calculated time evolution of kinetic energies, quadrupole moments and quadrupole deformation, expected values of angular momentum, and density distribution for head-to-head and side-to-side collisions. Time-dependent Skyrme Hartree-Fock calculations in 3D coordinate space, with twisted averaged boundary conditions (TABC) using Sky3D code.

doi: 10.1103/PhysRevC.99.054318
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2019WA26      Phys.Rev.Lett. 123, 122501 (2019)

Z.-A.Wang, J.Pei, Y.Liu, Y.Qiang

Bayesian Evaluation of Incomplete Fission Yields

NUCLEAR REACTIONS 227,229,232Th, 231Pa, 232,233,234,235,236,237,238U, 237,238Np, 238,239,240,241,242Pu, 241,243Am, 242,243,244,245,246,248Cm, 249,251Cf, 254Es, 255Fm(n, F), E not given; analyzed available data using from JENDL library; deduced missing fission yield values using the Bayesian neural network (BNN) approach.

doi: 10.1103/PhysRevLett.123.122501
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2018CH31      Phys.Lett. B 781, 412 (2018)

J.Chen, J.L.Lou, Y.L.Ye, Z.H.Li, D.Y.Pang, C.X.Yuan, Y.C.Ge, Q.T.Li, H.Hua, D.X.Jiang, X.F.Yang, F.R.Xu, J.C.Pei, J.Li, W.Jiang, Y.L.Sun, H.L.Zang, Y.Zhang, N.Aoi, E.Ideguchi, H.J.Ong, J.Lee, J.Wu, H.N.Liu, C.Wen, Y.Ayyad, K.Hatanaka, D.T.Tran, T.Yamamoto, M.Tanaka, T.Suzuki

A new measurement of the intruder configuration in 12Be

NUCLEAR REACTIONS 11Be(d, p), E=26.9 MeV/nucleon; measured reaction products, Ep, Ip; deduced σ(θ), low-lying isomeric 0+ states, J, π, spectroscopic factors. Comparison with available data.

doi: 10.1016/j.physletb.2018.04.016
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetE2604. Data from this article have been entered in the XUNDL database. For more information, click here.

2018CH38      Phys.Rev. C 98, 014616 (2018)

J.Chen, J.L.Lou, Y.L.Ye, Z.H.Li, D.Y.Pang, C.X.Yuan, Y.C.Ge, Q.T.Li, H.Hua, D.X.Jiang, X.F.Yang, F.R.Xu, J.C.Pei, J.Li, W.Jiang, Y.L.Sun, H.L.Zang, Y.Zhang, G.Li, N.Aoi, E.Ideguchi, H.J.Ong, J.Lee, J.Wu, H.N.Liu, C.Wen, Y.Ayyad, K.Hatanaka, D.T.Tran, T.Yamamoto, M.Tanaka, T.Suzuki

Low-lying states in 12Be using one-neutron transfer reaction

NUCLEAR REACTIONS 1,2H(11Be, 11Be), (11Be, p), E=26.9 MeV/nucleon; measured recoils, Ep, Ip, p(θ), Eγ and Iγ from decay of recoils, (recoil)p-coin, differential σ(θ) for low-lying 0+, 2+ and 1- states in 12Be, half-life of excited 0+ isomer by decay-tagging method using (CH2)n and (CD2)n targets, annular silicon detectors (ADSSD) for protons, detector telescopes for charged particle detection, and scintillation detectors for γ detection, and isomer-tagging method at RCNP-Osaka. DWBA analysis of σ(θ) data. 12Be; deduced levels, J, π, spectroscopic factors, single-particle components in the g.s. and excited 0+ state. Comparison with shell-model calculations, and with previous experimental results. 11,12Be; calculated B(E2), B(E1), S(n) and S(2n) from shell-model, and compared with experimental data in literature.

doi: 10.1103/PhysRevC.98.014616
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetE2604. Data from this article have been entered in the XUNDL database. For more information, click here.

2018ZU01      Chin.Phys.C 42, 064106 (2018)

Z.-W.Zuo, J.-C.Pei, X.-Y.Xiong, Y.Zhu

Global analysis of Skyrme forces with higher-order density dependencies

NUCLEAR STRUCTURE N<170; calculated binding energies, fission barriers, charge radii, equation of state. 240Pu; Comparison with available data.

doi: 10.1088/1674-1137/42/6/064106
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2017WA30      Phys.Rev. C 96, 031301 (2017)

K.Wang, M.Kortelainen, J.C.Pei

Probing surface quantum flows in deformed pygmy dipole modes

NUCLEAR STRUCTURE 40Mg; calculated transition strength functions of isovector dipole resonances, transition density distributions of pygmy and giant dipole resonances, neutron transition current density of pygmy dipole resonance (PDR), transition current density for neutron K=0 prolate GDR, neutron current density for K=1 oblate GDR, and proton current density for K=0 prolate PDR and K=0 prolate GDR; deduced surface flow patterns become more complicated as excitation energies increase. Fully self-consistent continuum finite-amplitude quasiparticle random phase approximation (FAM-QRPA) calculation in a large deformed spatial mesh.

doi: 10.1103/PhysRevC.96.031301
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2017ZH44      Phys.Scr. 92, 114001 (2017)

Y.Zhu, J.C.Pei

Towards microscopic studies of survival probabilities of compound superheavy nuclei

NUCLEAR STRUCTURE 258No, 286Cn; calculated temperature-dependent fission barriers, level density and mass parameters, neutron emission and resonance widths. Skyrme-Hartree-Fock+BCS method.

doi: 10.1088/1402-4896/aa8c63
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2016XI01      Phys.Rev. C 93, 024311 (2016)

X.Y.Xiong, J.C.Pei, W.J.Chen

Extension and parametrization of high-order density dependence in Skyrme forces

NUCLEAR STRUCTURE 16O, 36Mg, 40,48Ca, 50Cr, 56,78Ni, 100Zr, 120,132Sn, 160Gd, 176Hf, 198,208Pb, 236U, 252Fm, 260Sg; N=8-160; calculated binding energies of 603 even-even nuclei using axially symmetric Hartree-Fock+BCS solver SKYAX with the original SLy4, the refitted SLy4', and the extended SLy4 (global) parameter sets. Comparison with data in AME-2012.

doi: 10.1103/PhysRevC.93.024311
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2016XI04      Chin.Phys.C 40, 024101 (2016)

X.-Y.Xiong, J.-C.Pei, Y.-N.Zhang, Y.Zhu

Study of weakly-bound odd-A nuclei with quasiparticle blocking

NUCLEAR STRUCTURE 17,19B, 37Mg; calculated density distributions, pairing density distributions, emergence of deformed halo structures due to blocking effects. The coordinate-space Hartree-Fock-Bogoliubov (HFB) approach.

doi: 10.1088/1674-1137/40/2/024101
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2016ZH28      Phys.Rev. C 94, 024329 (2016)

Y.Zhu, J.C.Pei

Thermal fission rates with temperature dependent fission barriers

RADIOACTIVITY 240Pu, 260Fm, 278Cn, 292Fl(SF); calculated SF half-lives and SF barriers as functions of β2 quadrupole deformation and temperature. Finite-temperature Skyrme-Hartree-Fock+BCS method, and mass parameters by temperature-dependent cranking approximation. Comparison with available SF half-life data. Relevance to fast-neutron reactors, astrophysical environments, and fusion reactions for superheavy nuclei.

doi: 10.1103/PhysRevC.94.024329
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2015PE17      Phys.Rev. C 92, 064316 (2015)

J.C.Pei, N.Fei, Y.N.Zhang, P.Schuck

Generalized second-order Thomas-Fermi method for superfluid Fermi systems

NUCLEAR STRUCTURE 238U; calculated binding energies and neutron pairing density within a quasiparticle energy interval from 25 to 65 MeV by extending the second-order Thomas-Fermi approximation of the Hartree-Fock-Bogoliubov solutions for superfluid systems by including the effective mass and the spin-orbit potential.

doi: 10.1103/PhysRevC.92.064316
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2015XU10      Rom.J.Phys. 60, 829 (2015)

F.Xu, S.Wang, J.Pei, W.Chen, Z.Xu

Molecular Structures in Light Atomic Nuclei

NUCLEAR STRUCTURE 7,8Li, 10Be; calculated energy levels, J, π, binding energies.

2015YA05      Phys.Rev. C 91, 024304 (2015)

Z.H.Yang, Y.L.Ye, Z.H.Li, J.L.Lou, J.S.Wang, D.X.Jiang, Y.C.Ge, Q.T.Li, H.Hua, X.Q.Li, F.R.Xu, J.C.Pei, R.Qiao, H.B.You, H.Wang, Z.Y.Tian, K.A.Li, Y.L.Sun, H.N.Liu, J.Chen, J.Wu, J.Li, W.Jiang, C.Wen, B.Yang, Y.Liu, Y.Y.Yang, P.Ma, J.B.Ma, S.L.Jin, J.L.Han, J.Lee

Helium-helium clustering states in 12Be

NUCLEAR REACTIONS C(12Be, 12Be'), E=29 MeV/nucleon, [secondary 12Be beam from 9Be(16O, X), E=70 MeV/nucleon primary reaction]; measured 12Be particle spectra through reconstruction of 6He+6He and 4He+8He channels, (particle)(particle)-coin, time-of-flight (TOF), energy loss, angular correlations at HIRFL-RIBLL-Lanzhou facility. 12Be; deduced levels, J, π, widths, E0 matrix element strength for isoscalar monopole transition. DWBA analysis of angular correlation data.

doi: 10.1103/PhysRevC.91.024304
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetS0098. Data from this article have been entered in the XUNDL database. For more information, click here.

2014FU04      Phys.Rev. C 89, 054301 (2014)

X.M.Fu, F.R.Xu, C.F.Jiao, W.Y.Liang, J.C.Pei, H.L.Liu

Irregularity in Kπ = 8- rotational bands of N=150 isotones

NUCLEAR STRUCTURE 246Cm, 248Cf, 250Fm, 252No; calculated levels J, π of two-quasiparticle states, deformations. 250Fm, 252No; calculated configuration-constrained total Routhian surfaces (CCTRS), kinetic and dynamic moments of inertia for two-quasiparticle rotational bands. Self-consistent total-Routhian-surface (TRS) model with particle-number-conserving method for pairing. Comparison with experimental data.

doi: 10.1103/PhysRevC.89.054301
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2014JI14      Phys.Rev. C 90, 054314 (2014)

C.F.Jiao, J.C.Pei, F.R.Xu

Beyond-mean-field calculations of collectivities of neutron-rich Fe and Cr isotopes

NUCLEAR STRUCTURE 56,58,60,62,64,66,68Fe, 54,56,58,60,62,64,66Cr; calculated levels, J, π, deformation of ground states, B(E2) of collective states. 236,238,240,242,244Pu, 242,244,246,248,250Cm; calculated inner and outer fission barriers, angular-momentum-conserved potential energy surfaces (PES) incorporating angular-momentum projection into the macroscopic-microscopic model. Comparison with mean-field calculations and experimental data.

doi: 10.1103/PhysRevC.90.054314
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2014PE15      Phys.Rev. C 90, 024317 (2014)

J.C.Pei, G.I.Fann, R.J.Harrison, W.Nazarewicz, Y.Shi, S.Thornton

Adaptive multi-resolution 3D Hartree-Fock-Bogoliubov solver for nuclear structure

NUCLEAR STRUCTURE 110Mo; calculated single-neutron and proton wave functions, one-quasiparticle energies, occupations, chemical potential, and total energy, neutron density distributions, total binding energy, kinetic energy, spin-orbit-Coulomb-energy, mass rms radii and quadrupole moments. Nuclear density functional theory (DFT) based on adaptive multi-resolution 3D Hartree-Fock-Bogoliubov (HFB) solver using MADNESS-HFB. Parallel programming techniques using high-performance supercomputers. Comparison with other theoretical calculations.

doi: 10.1103/PhysRevC.90.024317
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2014PE19      Phys.Rev. C 90, 051304 (2014)

J.C.Pei, M.Kortelainen, Y.N.Zhang, F.R.Xu

Emergent soft monopole modes in weakly bound deformed nuclei

NUCLEAR STRUCTURE 100Zr, 38,40,42,44Mg; calculated isoscalar monopole strengths using finite amplitude method for the quasiparticle random-phase approximation (FAM-QRPA) based on HFB-AX and HFBTHO codes for 100Zr and based on HFB-AX using the SLy4 and SkM* interactions for Mg isotopes. Evidence of enhanced soft monopole strengths and collectivity.

doi: 10.1103/PhysRevC.90.051304
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2014YA08      Phys.Rev.Lett. 112, 162501 (2014)

Z.H.Yang, Y.L.Ye, Z.H.Li, J.L.Lou, J.S.Wang, D.X.Jiang, Y.C.Ge, Q.T.Li, H.Hua, X.Q.Li, F.R.Xu, J.C.Pei, R.Qiao, H.B.You, H.Wang, Z.Y.Tian, K.A.Li, Y.L.Sun, H.N.Liu, J.Chen, J.Wu, J.Li, W.Jiang, C.Wen, B.Yang, Y.Y.Yang, P.Ma, J.B.Ma, S.L.Jin, J.L.Han, J.Lee

Observation of Enhanced Monopole Strength and Clustering in 12Be

NUCLEAR REACTIONS 12C(12Be, X)4He/6He/8He, E=29 MeV/nucleon; measured reaction products, Eα, Iα, fragment coin.; deduced resonant state, J, π, enhanced monopole matrix element, cluster decay branching ratio, angular correlations. Comparison with energy-spin systematics, generalized two-center cluster model, DWBA calculations.

doi: 10.1103/PhysRevLett.112.162501
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetS0098. Data from this article have been entered in the XUNDL database. For more information, click here.

2014ZH38      Phys.Rev. C 90, 054316 (2014)

Y.Zhu, J.C.Pei

Microscopic description of neutron emission rates in compound nuclei

NUCLEAR STRUCTURE 238,258U; calculated neutron density distributions, neutron gas density emission widths, entropy, excited energies, neutron Fermi energies at different temperatures. 278Cn, 292Fl; calculated neutron gas density and emission widths at different temperatures. Finite-temperature HFB (FT-HFB) approach for neutron emission rates from deformed compound nuclei.

doi: 10.1103/PhysRevC.90.054316
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2013BO19      Comput.Phys.Commun. 184, 085101 (2013)

S.Bogner, A.Bulgac, J.Carlson, J.Engel, G.Fann, R.J.Furnstahl, S.Gandolfi, G.Hagen, M.Horoi, C.Johnson, M.Kortelainen, E.Lusk, P.Maris, H.Nam, P.Navratil, W.Nazarewicz, E.Ng, G.P.A.Nobre, E.Ormand, T.Papenbrock, J.Pei, S.C.Pieper, S.Quaglioni, K.J.Roche, J.Sarich, N.Schunck, M.Sosonkina, J.Terasaki, I.Thompson, J.P.Vary, S.M.Wild

Computational nuclear quantum many-body problem: The UNEDF project

NUCLEAR REACTIONS 3He(d, p), 7Be(p, γ), E<1MeV; 172Yb, 188Os, 238U(γ, X), E<24 MeV; calculated σ. Comparison with experimental data.

NUCLEAR STRUCTURE 100Zr; calculated quadrupole deformation parameter, radii, neutron separation energy.

doi: 10.1016/j.cpc.2013.05.020
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2013FU05      Phys.Rev. C 87, 044319 (2013)

X.M.Fu, F.R.Xu, J.C.Pei, C.F.Jiao, Y.Shi, Z.H.Zhang, Y.A.Lei

Configuration-constrained total Routhian surfaces with particle-number-conserving pairing

NUCLEAR STRUCTURE 176Hf, 178W; calculated configuration-constrained total Routhian surfaces (TRS), particle-number-conserving pairing, moments of inertia, levels, J, π, K, β2, β4, γ deformation parameters of high-K multi-quasiparticle rotational bands, pairing energies, proton and neutron occupation probability. TRS calculations. Comparison with experimental data.

doi: 10.1103/PhysRevC.87.044319
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2013PE06      Phys.Rev. C 87, 051302 (2013)

J.C.Pei, Y.N.Zhang, F.R.Xu

Evolution of surface deformations of weakly bound nuclei in the continuum

NUCLEAR STRUCTURE 38Ne, 40,44Mg, 100,106,110Ge, 212,218,224Er; Z=32, N=58-76; Z=68, N=136-154; calculated neutron and proton density profiles, neutron and proton pairing density, quadrupole deformation of neutrons, isovector deformation, smoothed occupation numbers of neutron quasiparticle states. Skyrme-HFB approach. Halo structure in 38Ne and deformed halo in 110Ge.

doi: 10.1103/PhysRevC.87.051302
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2013WA02      Phys.Rev. C 87, 014311 (2013)

S.M.Wang, J.C.Pei, F.R.Xu

Spectroscopic calculations of cluster nuclei above double shell closures with a new local potential

NUCLEAR STRUCTURE 20,22Ne, 44,46,52,54Ti, 60,62Zn, 136,138Te, 212Po; calculated levels, B(E2), α-decay widths, using binary cluster potential with a new local potential. Comparison with experimental data.

doi: 10.1103/PhysRevC.87.014311
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2013XU04      Acta Phys.Pol. B44, 271 (2013)

F.R.Xu, H.L.Liu, Y.Shi, H.L.Wang, P.M.Walker, S.Frauendorf, J.C.Pei

New Studies on the Aspects of Nuclear Shapes

NUCLEAR STRUCTURE 158Er, 252,250Fm, 254,252No, 256,254Rf, 66,68,70,72Ge; calculated moment of inertia, quadrupole deformation parameters, tilted crancking total Routhians.

doi: 10.5506/APhysPolB.44.271
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2013ZH50      Phys.Rev. C 88, 054305 (2013)

Y.N.Zhang, J.C.Pei, F.R.Xu

Hartree-Fock-Bogoliubov descriptions of deformed weakly bound nuclei in large coordinate spaces

NUCLEAR STRUCTURE 34,36,38Ne, 40,42,44Mg; calculated Neutron density and neutron pairing density profiles with different box sizes, smoothed particle and pairing occupation numbers of neutron quasiparticle states. 178,180,182,184,186,188,190,192,194,196,198,200Nd; calculated neutron Fermi energies. Deformed halos and peninsulas of stability beyond drip lines. Skyrme Hartree-Fock-Bogoliubov (HFB) approach in large coordinate-space boxes for weakly bound deformed nuclei.

doi: 10.1103/PhysRevC.88.054305
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2012LI46      Phys.Scr. T150, 014022 (2012)

Z.J.Lin, J.C.Pei, F.R.Xu

α-decay calculations of superheavy nuclei with a folded Woods-Saxon potential

RADIOACTIVITY 246,248,250,252,254,256Fm, 252,254,256No, 256Rf, 260,266Sg, 264,266,270Hs, 270Ds, 284Cn, 288Fl, 292Lv(α); calculated T1/2. Comparison with experimental data.

doi: 10.1088/0031-8949/2012/T150/014022
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2012SH07      Phys.Rev.Lett. 108, 092501 (2012)

Y.Shi, J.Dobaczewski, S.Frauendorf, W.Nazarewicz, J.C.Pei, F.R.Xu, N.Nikolov

Self-Consistent Tilted-Axis-Cranking Study of Triaxial Strongly Deformed Bands in 158Er at Ultrahigh Spin

NUCLEAR STRUCTURE 158Er; calculated lowest and total Routhian surface, relative energies of configurations, charge and transition quadrupole moments, angular momenta for bands. Skyrme-Hartree-Fock model.

doi: 10.1103/PhysRevLett.108.092501
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2011NI06      Phys.Rev. C 83, 034305 (2011)

N.Nikolov, N.Schunck, W.Nazarewicz, M.Bender, J.Pei

Surface symmetry energy of nuclear energy density functionals

NUCLEAR STRUCTURE 192,194Hg, 192,194,196Pb, 236,238U, 240Pu, 242Cm; calculated deformation energies versus deformation parameter, 0+ superdeformed bandhead energies in Hg and Pb nuclei, and fission isomers in actinides. 236,248,260,270,298U; calculated contributions of the Coulomb, surface symmetry, curvature, and surface terms of fission isomers. 100Sn, 100Zr; calculated contribution to the total deformation energy per nucleon. Nuclear energy density functional (EDF) theory applied to examine the role of the surface symmetry energy in nuclei using various Skyrme energy density functionals (EDFs). Comparison with experimental data.

doi: 10.1103/PhysRevC.83.034305
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2011PE18      Phys.Rev. C 84, 024311 (2011)

J.C.Pei, A.T.Kruppa, W.Nazarewicz

Quasiparticle continuum and resonances in the Hartree-Fock-Bogoliubov theory

NUCLEAR STRUCTURE 70Zn; calculated continuum contributions, binding energy as a function of low-energy quasiparticle neutron cutoff, Occupation numbers of the discretized neutron quasiparticle continuum states, phase shifts of neutron 1s1/2 state, deep-hole HFB resonance widths and energies. 90Ni; HFB neutron resonance energies and widths, phase shift of the neutron 1p3/2 resonance. 84,86,88,90Ni; calculated continuum contributions. Hartree-Fock-Bogoliubov (HFB) equations, Thomas-Fermi approximation for quasiparticle continuum, HFB resonances and deep-hole states.

doi: 10.1103/PhysRevC.84.024311
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2010PE08      Nucl.Phys. A834, 381c (2010)

J.C.Pei, W.Nazarewicz, J.A.Sheikh, A.K.Kerman

Fission barriers and neutron gas in compound superheavy nuclei

NUCLEAR STRUCTURE 278Cn, 292Fl; calculated fission barriers, related features using the finite-temperature Hartree-Fock-Bogoliubov method.

doi: 10.1016/j.nuclphysa.2010.01.045
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2009PE10      Phys.Rev.Lett. 102, 192501 (2009)

J.C.Pei, W.Nazarewicz, J.A.Sheikh, A.K.Kerman

Fission Barriers of Compound Superheavy Nuclei

NUCLEAR STRUCTURE 264Fm, 272Ds, 278Cn, 292Fl, 312124; calculated isentropic fission barriers. Self-consistent nuclear density functional theory.

doi: 10.1103/PhysRevLett.102.192501
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2009PE32      Eur.Phys.J. A 42, 595 (2009)

J.C.Pei, W.Nazarewicz, M.Stoitsov

Coordinate-space Hartree-Fock-Bogoliubov description of superfluid Fermi systems

NUCLEAR STRUCTURE 34,36,38,40,42Mg; calculated quadrupole moments, binding energy, two-neutron separation energy, related features. Comparison with another method.

doi: 10.1140/epja/i2009-10797-2
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2009SH26      Phys.Rev. C 80, 011302 (2009)

J.A.Sheikh, W.Nazarewicz, J.C.Pei

Systematic study of fission barriers of excited superheavy nuclei

NUCLEAR STRUCTURE Z=110-124, N=166-188; calculated thermal fission barriers of superheavy nuclei as a function of excitation energy and inverse barrier damping parameters based on the FT-HF+BCS extension of the solver HFODD. 240Pu, 256Fm; calculated quenching of triaxial and reflection asymmetric deformations with excitation energy and fission pathways. Finite-temperature Self-consistent Hartree-Fock + Bardeen-Cooper-Scheiffer (FT-HF+BCS) calculations.

doi: 10.1103/PhysRevC.80.011302
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2008PE29      Phys.Rev. C 78, 064306 (2008)

J.C.Pei, M.V.Stoitsov, G.I.Fann, W.Nazarewicz, N.Schunck, F.R.Xu

Deformed coordinate-space Hartree-Fock-Bogoliubov approach to weakly bound nuclei and large deformations

NUCLEAR STRUCTURE 90Ni, 102,110Zr, 120Sn; calculated pairing energies. 84,86,88,90Ni; calculated pairing densities. 240Pu; calculated fission path. Hartree-Fock-Bogoliubov calculations.

doi: 10.1103/PhysRevC.78.064306
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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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2007PE26      Phys.Lett. B 650, 224 (2007)

J.C.Pei, F.R.Xu

Helium-cluster decay widths of molecular states in beryllium and carbon isotopes

NUCLEAR STRUCTURE 8,10,12Be, 12,13,14C, 20Ne; calculated α-decay and cluster decay widths; deduced T1/2. Self-consistent mean-field model, folding form cluster potential.

doi: 10.1016/j.physletb.2007.05.018
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2007PE30      Phys.Rev. C 76, 044326 (2007)

J.C.Pei, F.R.Xu, Z.J.Lin, E.G.Zhao

α-decay calculations of heavy and superheavy nuclei using effective mean-field potentials

RADIOACTIVITY 166,168,170,172,174,176,178,180,182Pt, 172,174,176,178,180,182,184,186,188Hg, 178,180,182,184,186,188,190,192,194,210Pb, 188,190,192,194,196,198,200,202,204,206,208,210,212,214,216,218Po, 196,198,200,202,204,206,208,210,212,214,216,218,220,222Rn, 202,204,206,208,210,212,214,216,218,220,222,224,226Ra, 210,212,214,216,218,220,222,224,226,228,230Th, 218,220,222,224,226,228,230,232,234,236U, 228,230,232,234,236,238,240,242,244Pu, 238,240,242,244,246,248Cm, 240,242,244,246,248,250,252,254Cf, 246,248,250,252,254,256Fm, 252,254,256No, 254,256,258Rf, 258,260,262Sg, 264,266,270Hs, 270Ds, 286,288Fl, 292Lv, 294Og(α); calculated half-lives, deformation parameters, α-clustering spectroscopic factors, comparisons with experimental half-lives.

doi: 10.1103/PhysRevC.76.044326
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2006PE01      Nucl.Phys. A765, 29 (2006)

J.C.Pei, F.R.Xu, P.D.Stevenson

Deformation effects on the structures of N = 7 halo nuclei

NUCLEAR STRUCTURE 9He, 11Be, 13C, 15O; calculated particle density distributions, binding energies, radii. Skyrme-Hartree-Fock model.

doi: 10.1016/j.nuclphysa.2005.10.004
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2006XU15      Phys.Lett. B 642, 322 (2006)

F.R.Xu, J.C.Pei

Mean-field cluster potentials for various cluster decays

NUCLEAR STRUCTURE 104,106,108,110Te, 110,112Xe, 112,114Ba, 212Po, 222,224,226Ra, 228,230Th, 232,234U, 236,238Pu; calculated α and cluster decay widths; deduced T1/2. 16Ne, 38Ti; calculated di-proton cluster decay width; deduced T1/2. Self-consistent mean-field model, folding form cluster potential.

doi: 10.1016/j.physletb.2006.09.048
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2005PE04      Phys.Rev. C 71, 034302 (2005)

J.C.Pei, F.R.Xu, P.D.Stevenson

Density distributions of superheavy nuclei

NUCLEAR STRUCTURE 254,256,258Rf, 258,260,266Sg, 264,266,270Hs, 270Ds, 284Cn, 288,298Fl, 292Lv; calculated deformation parameters, radii, Qα. 208Pb, 270,280,290Ds, 286,292,298,304,310Fl, 292120; calculated particle density distributions. Skyrme-Hartree-Fock model.

doi: 10.1103/PhysRevC.71.034302
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2005XU08      J.Phys.(London) G31, S1541 (2005)

F.R.Xu, J.C.Pei, P.D.Stevenson

Densities of superheavy nuclei at closed shells

NUCLEAR STRUCTURE Z=114; Z=120; Z=126; calculated matter density distributions.

doi: 10.1088/0954-3899/31/10/028
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