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NSR database version of April 11, 2024.

Search: Author = X.Guan

Found 23 matches.

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2023GU05      Phys.Rev. C 107, 034307 (2023)

X.Guan, T.-C.Wang, W.-Q.Jiang, Y.Su, Y.-J.Chen, K.Pomorski

Impact of the pairing interaction on fission of U isotopes

NUCLEAR REACTIONS 232,233,234,235,236,238U(n, F), E=thermal; calculated fragment mass distribution, total kinetic energy distribution. Deformed mean-field plus standard pairing model. Comparison to experimental data and ENDF/B-VIII.0.

NUCLEAR STRUCTURE 236U; calculated potential-energy surface, static fission path, prescission point, scission process point, asymmetric and symmetric scission points, neutron and proton pairing interaction energy. 231,232,233,234,235,236,238,239,240U; calculated fission barrier height. Comparison to experimental data.

doi: 10.1103/PhysRevC.107.034307
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2023WU11      Nucl.Instrum.Methods Phys.Res. A1057, 168779 (2023)

H.Wu, X.Guan, G.Wu, H.Wang, Y.Wang, J.Du, L.Zhang, L.Gu

Experimental validation of a BNCT epithermal neutron flux detector using 55Mn(n, γ)56Mn reaction at an accelerator-based BNCT facility

NUCLEAR REACTIONS 55Mn(n, γ), E epithermal; measured reaction products, Eγ, Iγ; deduced induced radioactivity in the activated MnNi foil, epithermal neutron flux. GMX60 detector, the AB-BNCT facility developed by Lanzhou University by irradiating the detector in the neutron field.

doi: 10.1016/j.nima.2023.168779
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2021GU26      Phys.Rev. C 104, 044329 (2021)

X.Guan, Y.Xin, Y.-J.Chen, X.-Z.Wu, Z.-X.Li

Impact of pairing interactions on fission in the deformed mean-field plus standard pairing model

NUCLEAR STRUCTURE 220,221,222,223,224,225,226,227,228,229,230,231,232,233,234,235Th, 222,223,224,225,226,227,228,229,230,231,232,233,234,235,236,237U, 224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,239Pu; calculated odd-even mass differences using extended pairing model, and compared with experimental values. 226Th; calculated potential-energy surface contour in (ϵ, α3) plane, neutron and proton pairing correction energies as function of ϵ deformation, inner and outer barrier heights, information entropy. 228,229,230,231,232Th, 232,233,234,236U, 236,237,238Pu; calculated root-mean-square deviations of the theoretical inner and outer heights using BCS pairing, and compared with experimental values. Deformed mean-field plus extended pairing model.

doi: 10.1103/PhysRevC.104.044329
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2021MA15      Phys.Rev. C 103, 024302 (2021)

K.Y.Ma, H.Wang, H.N.Pan, J.B.Lu, Y.J.Ma, D.Yang, Q.Y.Yang, X.Guan, J.Q.Wang, S.Y.Liu, H.C.Zhang, X.G.Wu, Y.Zheng, C.B.Li

High-spin states and possible chirality in odd-odd 110Ag

NUCLEAR REACTIONS 110Pd(7Li, 3nα)110Ag, E=46 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO) using Compton-suppressed HPGe detectors, two planar-type HPGe detectors, and one clover HPGe detector at the HI-13 tandem accelerator of CIAE-Beijing. 110Ag; deduced high-spin levels, J, π, bands, multipolarities, alignments, configurations, moment of inertia plots, staggering parameters, B(M1)/B(E2), chiral doublet bands. Comparison with Cranked shell model calculations.

doi: 10.1103/PhysRevC.103.024302
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2020MA41      Eur.Phys.J. A 56, 209 (2020)

K.Y.Ma, J.B.Lu, J.Li, Y.J.Ma, D.Yang, W.J.Sun, Q.Y.Yang, X.Guan, J.Q.Wang, H.N.Pan, H.Wang, T.F.Cui, D.M.Zhang, L.H.Zhu, X.G.Wu, Y.Zheng, C.B.Li

Candidate magnetic rotational band in 109Ag

NUCLEAR REACTIONS 110Pd(7Li, 4nα)109Ag, E=46 MeV; measured reaction products, Eγ, Iγ, γ-γ-coin.; deduced γ-ray energies and intensities, J, π, level scheme, bands, momenta, B(M1)/B(E2) ratios.

doi: 10.1140/epja/s10050-020-00213-w
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2020PA42      Eur.Phys.J. Special Topics 229, 2497 (2020)

F.Pan, X.Guan, L.-R.Dai, Y.Zhang, J.P.Draayer

Exact solutions of mean-field plus various pairing interactions and shape phase transitions in nuclei

NUCLEAR STRUCTURE 58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77Ni, 157,158,159,160,161,162,163,164,165,166,167,168,169,170,171Er, 159,160,161,162,163,164,165,166,167,168,169,170,171,172,173,174Yb, 223,224,225,226,227,228,229,230,231,232,233,234,235Th, 226,227,228,229,230,231,232,233,234,235,236,237,238,239U; calculated pairing gap, binding energies. Comparison with available data.

doi: 10.1140/epjst/e2020-000014-5
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2020YU04      Eur.Phys.J. A 56, 164 (2020)

Y.Yue, Y.Chen, X.Guan

Quantum phase transitions and spectral statistical properties in nuclei near N ∼ 90

doi: 10.1140/epja/s10050-020-00150-8
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2019GU10      Nucl.Phys. A986, 86 (2019)

X.Guan, H.Zhao, F.Pan, J.P.Draayer

Ground-state shape evolution in Er and Yb isotopes

NUCLEAR STRUCTURE 154,155,156,157,158,159,160,161,162,163Er, 156,157,158,159,160,161,162,163,164,165Yb; calculated, extracted deformation parameters using published experimental data, neutron/proton pairing interaction strength from binding energies and odd-even mass differences, energy ratio; deduced that the gs shape (phase) evolution is mainly due to pairing interaction and less by quadrupole deformation. Axially deformed Nilsson mean-field plus extended pairing model.

doi: 10.1016/j.nuclphysa.2019.03.012
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2019MA48      Phys.Rev. C 100, 014326 (2019)

K.Y.Ma, J.B.Lu, J.Li, D.Yang, Y.J.Ma, W.J.Sun, X.Guan, D.M.Zhang, L.H.Zhu, X.G.Wu, Y.Zheng, C.B.Li, Y.Z.Liu

Possible antimagnetic rotational band and neutron alignment in 113In

NUCLEAR REACTIONS 110Pd(7Li, 4n), E=38, 50 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO) using HPGe detector array at CIAE-Beijing. 113In; deduced levels, J, π, multipolarities, configurations, alignments, magnetic dipole rotational (shears) bands, antimagnetic rotational bands. Comparison with self-consistent tilted axis cranking relativistic mean-field calculations, with the structure of 111In, and with previous experimental results; predicted B(E2), deformation parameters β2 and γ, and J2/B(E2).

doi: 10.1103/PhysRevC.100.014326
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2018LI14      Phys.Rev. C 97, 034331 (2018)

C.B.Li, X.G.Wu, Y.Zheng, Y.J.Jin, H.L.Ma, G.S.Li, J.Zhong, B.J.Zhu, T.X.Li, Y.X.Gao, X.Guan, J.Q.Liu

Level structure in the transitional nucleus 199Tl

NUCLEAR REACTIONS 196Pt(7Li, 4n), E=40 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO) using eight Compton-suppressed HPGe detectors and two planar HPGe detectors at HI-13 tandem accelerator of China Institute of Atomic Energy (CIAE). 199Tl; deduced high-spin levels, J, π, bands, multipolarities, configurations, alignments, oblate shapes, potential energy surfaces for 17/2- state. Comparison with cranked Nilsson-Strutinsky-Bogoliubov (CNSB) model calculations. Systematics of 13/2+ states in N=104-122 Tl and Bi nuclei. Systematics of negative-parity yrast states and positive-parity 3-qp yrast states in 195,197,199Tl.

doi: 10.1103/PhysRevC.97.034331
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2017GU09      Chin.Phys.C 41, 054002 (2017)

X-C.Guan, Y.-K.Lu, H.-J.He, J.-T.Zhao, Q.Wang, K.-H.Fang, X.Meng, T.-S.Wang, J.Kasagi

Deuterium depth distribution study in Yb

NUCLEAR REACTIONS 2H(d, p), E=20 keV; measured reaction products, Ep, Ip; deduced proton yields, deuterium depth distribution for 20 keV deuterons implanted into Yb foil.

doi: 10.1088/1674-1137/41/5/054002
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2016GU12      Phys.Rev. C 94, 024309 (2016)

X.Guan, H.Xu, Y.Zhang, F.Pan, J.P.Draayer

Ground state phase transition in the Nilsson mean-field plus standard pairing model

NUCLEAR STRUCTURE 144,145,146,147,148,149,150,151,152,153,154,155Nd, 146,147,148,149,150,151,152,153,154,155,156,157Sm, 148,149,150,151,152,153,154,155,156,157,158,159Gd; calculated Pairing interaction strength G, odd-even mass differences, odd-even differences of S(2n) values, odd-even differences of α-, and β--decay energies. Nilsson mean-field plus standard pairing model for the ground state phase transitions. Comparison with experimental values taken from NNDC databases.

doi: 10.1103/PhysRevC.94.024309
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2015GU19      Phys.Rev. C 92, 044303 (2015)

X.Guan, K.D.Launey, Y.Wang, F.Pan, J.P.Draayer

Ground-state properties of rare-earth nuclei in the Nilsson mean-field plus extended-pairing model

NUCLEAR STRUCTURE 152,153,154,155,156,157,158,159,160,161,162,163,164Er, 154,155,156,157,158,159,160,161,162,163,164,165,166Yb, 156,157,158,159,160,161,162,163,164,165,166,167,168Hf; calculated pairing interaction strengths, binding energies, even-odd mass differences, energies of the first pairing excitation states in A=156-164 Er, A=160-165 Yb and A=166-168 Hf nuclei, and moments of inertia for the ground-state bands. Dominance of s, d, and g valence nucleon pairs in the ground state. Nilsson mean-field using proton-proton and neutron-neutron pairing interactions. Comparison with experimental data.

doi: 10.1103/PhysRevC.92.044303
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2015ZH37      Chin.Phys.C 39, 104103 (2015)

Y.Zhang, X.Guan, Y.Wang, Y.Zuo, L.N.Bao, F.Pan

Shape phase transition in the odd Sm nuclei: effective order parameter and odd-even effect

NUCLEAR STRUCTURE 145,146,147,148,149,150,151,152,153,154,155,156,157,158Sm; calculated two-neutron separation energies, odd-even mass difference, evolution of the pairing strength, first pairing-excitation energy. BCS theory, CBCS scheme.

doi: 10.1088/1674-1137/39/10/104103
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2013GU31      Phys.Rev. C 88, 044325 (2013)

X.Guan, K.D.Launey, J.Gu, F.Pan, J.P.Draayer

Level statistical properties of the spherical mean-field plus standard pairing model

NUCLEAR STRUCTURE 48,49,50,51,52,53Ca; calculated level spacing distribution, spectral rigidity, statistical energy spectra. 42,43,44,45,46,47,48,49,50,51,52Ca; calculated pairing gap and compared with experimental data. Spherical mean-field plus standard pairing model calculations, with pairing strength deduced from experimental data. Comparison with Gaussian orthogonal ensemble (GOE) predictions, and Poisson distribution.

doi: 10.1103/PhysRevC.88.044325
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2013ZH52      Phys.Rev. C 88, 064305 (2013)

Y.Zhang, L.Bao, X.Guan, F.Pan, J.P.Draayer

Ground-state phase transition in odd-A and odd-odd nuclei near N=90

NUCLEAR STRUCTURE Z=54-75, N=80-100; analyzed systematics of S(2n), odd-even mass differences, Q(α), Q(2β), neutron pairing strength, ground-state phase transitions. Comparison with experimental data.

doi: 10.1103/PhysRevC.88.064305
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2012GU16      Phys.Rev. C 86, 024313 (2012)

X.Guan, K.D.Launey, M.-x.Xie, L.Bao, F.Pan, J.P.Draayer

Heine-Stieltjes correspondence and the polynomial approach to the standard pairing problem

NUCLEAR STRUCTURE 42,43,44,45,46,47,48,49Ca, 58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77Ni, 146,147,148,149,150,151,152,153Sm; calculated pairing gaps. 110Sn; calculated relevant polynomials and the corresponding eigen-energies. Solution of the Bethe ansatz (Gaudin-Richardson) equations based on Heine-Stieltjes polynomials. Comparison with BCS (pairing) calculations and experimental data.

doi: 10.1103/PhysRevC.86.024313
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2012WA01      J.Phys.(London) G39, 015201 (2012)

T.S.Wang, X.C.Guan, K.H.Fang, J.T.Zhao, Q.H.He, M.C.Lan, X.X.Xu

Reanalysis of the astrophysical S(E) factors of the 6Li(d, α)4He, 7Li(p, α)4He and 6Li(p, α)3He reactions

NUCLEAR REACTIONS 6Li(d, α), 6,7Li(p, α), E<1 MeV; analyzed the data; deduced S-factors. Comparison with previous analysis.

doi: 10.1088/0954-3899/39/1/015201
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2011GU18      Chin.Phys.C 35, 747 (2011)

X.Guan, H.Li, Q.Tan, F.Pan, J.P.Draayer

Nilsson mean-field plus the extended pairing model description of rare earth nuclei

NUCLEAR STRUCTURE 166,167,168,169,170,171,172,173Hf, 154,155,156,157,158,159,160,161,162,163,164,165,166,167,168,169Er, 160,161,162,163,164,165,166,167,168,169,170,171Yb; calculated binding energies, J, π, mass differences. Nilsson mean-field plus, comparison with experimental data.

doi: 10.1088/1674-1137/35/8/009
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2011LU01      Chin.Phys.C 35, 26 (2011)

H.-Y.Lu, T.-S.Wang, Y.-C.Han, K.-H.Fang, X.Meng, Q.-H.He, X.-C.Guan, M.-C.Lan

Effect of deuteron density distribution on the deduction of screening potential from the D(d, p)T reaction in Be metals

NUCLEAR REACTIONS 2H(d, p), E(cm)=5.5-10 keV; measured Ep, Ip; deduced relative thick target yield of protons, screening energy. Comparison with theoretical calculations.

doi: 10.1088/1674-1137/35/1/006
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2009PA38      Phys.Rev. C 80, 044306 (2009)

F.Pan, M.-X.Xie, X.Guan, L.-R.Dai, J.P.Draayer

New exact solutions of the standard pairing model for well-deformed nuclei

doi: 10.1103/PhysRevC.80.044306
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2002GU26      Nucl.Phys. B642, 501 (2002)

X.W.Guan, A.Foerster, J.Links, H.Q.Zhou

Integrability and exact solution for coupled BCS systems associated with the su(4) Lie algebra

doi: 10.1016/S0550-3213(02)00776-9
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1994BA75      Chin.J.Nucl.Phys. 16, No 2, 100 (1994)

X.Bai, W.Liu, J.Qin, Z.Li, S.Zhou, J.Zhou, A.Li, Y.Wang, X.Guan, X.Wang

The Production of 11C and 17F Secondary Radioactive Beams

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Note: The following list of authors and aliases matches the search parameter X.Guan: , X.C.GUAN, X.W.GUAN