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NSR database version of April 27, 2024.

Search: Author = W.M.Seif

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2024SE01      Phys.Rev. C 109, 034604 (2024)

W.M.Seif, V.V.Sargsyan, G.G.Adamian, N.V.Antonenko

Influences of isospin-asymmetry and skin thickness on fusion of oxygen isotopes at stellar energies

doi: 10.1103/PhysRevC.109.034604
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2023FA13      J.Phys.(London) G50, 125102 (2023)

F.A.Fareed, W.M.Seif, A.Adel, I.A.M.Abdul-Magead

Signatures of elongated and compact configurations in the fusion barrier distribution of deformed nuclei

NUCLEAR REACTIONS ⁸⁹Y(³⁴S, X), ⁴⁰Ca(³²S, X), ¹²⁰Sn(²⁸Si, X), ⁹⁶Zr(⁴⁰Ca, X), ¹⁹²Os(⁴⁰Ca, X), ¹⁹⁴Pt(⁴⁰Ca, X), E(cm)<200 MeV; calculated fusion σ using the coupled-channel method, starting from orientation-dependent folding potentials based on M3Y-Reid nucleon–nucleon interaction, with coupling to the anticipated vibrational and rotational excitations in projectile and target nuclei; deduce the signature of the hot fusion process within the compact configuration of the participating deformed nuclei is always evident in the extracted fusion barrier distribution. Comparison with available data.

doi: 10.1088/1361-6471/acff10
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2023SE06      Phys.Rev. C 107, 044601 (2023)

W.M.Seif, A.Adel, N.V.Antonenko, G.G.Adamian

Enhanced α decays to negative-parity states in even-even nuclei with octupole deformation

RADIOACTIVITY ^{222,224,226,228,230,232}Th, ^222,224,226Ra, ^228,232U, ²³⁰Pu(α); calculated branching ratios with and without the inclusion of the hindrance factor to the ground and excited states in daughter nuclei. Described the correlation of static octupole deformation with enhancement of decay to low lying asymmetry states of negative parity. Comparison to experimental data.

doi: 10.1103/PhysRevC.107.044601
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2023SE12      Nucl.Phys. A1035, 122668 (2023)

W.M.Seif, A.S.Hashem

The isovector density-dependence of the M3Y nucleon-nucleon interactions and related soft and hard equations of state

doi: 10.1016/j.nuclphysa.2023.122668
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2023SE15      Phys.Rev. C 108, 024308 (2023)

W.M.Seif, A.R.Abdulghany

Stability and α decay of translead isomers and the related preformation probability of α particles

RADIOACTIVITY ^{187,187m,191,191m}Pb, ^{187,187m,189,189m,190,190m,193,193m,194,194m,195,195m,196,196m,197,197m,210,210m,212,212m}Bi, ^{193,193m,195,195m,197,197m,199,199m,201,201m,211,211m,212,212m}Po, ^{191,191m,193,193m,195,195m,197,197m,198,198m,199,199m,200,200m,202,202m,212,212m,214,214m}At, ^{195,195m,197,197m,199,199m,201,201m,203,203m}Rn, ^{199,199m,200,200,201,201m,202,202m,203,203m,204,204m,206,206m,214,214m,215,215m,216,216m,218,218m}Fr, ^{203,203m,205,205m,207,207m,213,213m,214,214m}Ra, ^{206,206m,208,208m,216,216m,217,217m}Ac, ^216,216mTh, ^217,217mPa, ^{216,216m,218,218m}U(α); calculated T_1/2 for ground an isomeric states α-decay, preformation probability. The preformed cluster model. Comparison to experimental data.

doi: 10.1103/PhysRevC.108.024308
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2022SE07      Phys.Rev. C 106, 015801 (2022)

W.M.Seif, A.S.Hashem, Y.Ramsis

Investigation of the inner edge of neutron star crusts: Temperature dependence and related effects

doi: 10.1103/PhysRevC.106.015801
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2022SE10      Int.J.Mod.Phys. E31, 2250074 (2022)

W.M.Seif, A.R.Abdulghany, A.Nasr

Macroscopic-microscopic calculations of the ground state properties of Z = 120 isotopes and their α-decay chains

RADIOACTIVITY ^{270,271,272,273,274,275,276,277,278,279,280,281,282,283,284,285,286,287,288,289,290,291,292,293,294,295,296,297,298,299,300,301,302,303,304,305,306,307,308,309,310,311,312,313,314}120(α); calculated the total energy surfaces, ground state masses, binding energy, deformations and fissionability, T_1/2 using macroscopic-microscopic scheme based on the Skyrme energy density functional, the Woods-Saxon single-particle potential and Strutinsky's method.

doi: 10.1142/S0218301322500744
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2021SE05      Nucl.Phys. A1008, 122142 (2021)

W.M.Seif, A.S.Hashem, R.N.Hassanien

Saturation properties of hot asymmetric nuclear matter using M3Y effective nucleon-nucleon interaction

doi: 10.1016/j.nuclphysa.2021.122142
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2021SE10      J.Phys.(London) G48, 025111 (2021)

W.M.Seif, A.R.Abdulghany, Z.N.Hussein

Change in neutron skin thickness after cluster-decay

RADIOACTIVITY ^{215,216,217,218,219,220,221,222,223,224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,239,240,241,242,243}U(²⁸Mg), (²⁴Ne), (²⁶Ne); calculated Q-values, T_1/2, change in neutron-skin thickness, the isospin-asymmetry using self-consistent Hartree-Fock-Bogolyubov based on Skyrme-SLy4 effective nucleon-nucleon interaction.

doi: 10.1088/1361-6471/abd233
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2021SE11      Phys.Rev. C 104, 014317 (2021)

W.M.Seif, G.G.Adamian, N.V.Antonenko, A.S.Hashem

Correlations of α-decay properties and isospin-asymmetry

NUCLEAR STRUCTURE Z=22-118, N=24-178; N-Z=2-60; calculated neutron skin thicknesses as a function of neutron number N and angular momentum, α-decay half-lives versus Q(α) for even-even α emitters; deduced correlations between the properties of α decay of even-even nuclei and their isospin asymmetry N-Z. Self-consistent Skyrme Hartree-Fock-Bogoliubov (SHFB) model.

doi: 10.1103/PhysRevC.104.014317
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2021SE12      Phys.Rev. C 104, 014616 (2021)

W.M.Seif, A.S.Hashem

Preformation probability of light charged particles emitted equatorially in ternary fission of ²⁵²Cf

RADIOACTIVITY ²⁵²Cf(SF); calculated relative yields and preformation probabilities of the ternary fission channels with ⁴He, ⁶He, ¹⁰Be and ¹⁴C as light third emitted nucleus, with various combinations of binary fragment systems. Wentzel-Kramers-Brillouin approximation, based on microscopic Skyrme potentials. Comparison with experimental yields.

doi: 10.1103/PhysRevC.104.014616
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2020SE09      Chin.Phys.C 44, 074105 (2020)

W.M.Seif, A.M.H.Abdelhady

Formation region of emitted α and heavier particles inside radioactive nuclei

NUCLEAR STRUCTURE A=190-220; analyzed available data; calculated the formation distance from the center of the radioactive parent nucleus at which the emitted cluster is most probably formed microscopically starting with the solution to the time-independent Schrodinger wave equation for the cluster-core system, using nuclear potentials based on the Skyrme-SLy4 nucleon-nucleon interactions and folding Coulomb potential.

doi: 10.1088/1674-1137/44/7/074105
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2020SE10      Phys.Rev. C 101, 064305 (2020)

W.M.Seif, A.M.H.Abdelhady, A.Adel

Ambiguity of applying the Wildermuth-Tang rule to estimate the quasibound states of α particles in α emitters

RADIOACTIVITY ^{105,106,107,108,109}Te, ^{186,190,191,194,195,196,197,198,199,200,201,202,204,205,206,207,208,210,212,213,214,215,216,218,219}Po, ^{204,207,209,211,213,214,215,216,217,218,219}At; calculated internal and external real part of the quasibound wave function, and spectroscopic α-preformation factors using the Bohr-Sommerfeld quantization condition along with the Wildermuth-Tang prescription in α-decay microscopic calculations. Comparison with other theoretical predictions.

doi: 10.1103/PhysRevC.101.064305
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2019IS05      Ann.Phys.(New York) 406, 1 (2019)

M.Ismail, W.M.Seif, W.M.Tawfik, A.M.Hussein

Effect of choosing the Q_α-values and daughter density distributions on the magic numbers predicted by α decays

NUCLEAR STRUCTURE Z=118, 120, 122, 124; calculated α-decay T_1/2. Comparison with available data.

doi: 10.1016/j.aop.2019.03.020
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2019SE02      Ann.Phys.(New York) 401, 149 (2019)

W.M.Seif, H.Anwer, A.R.Abdulghany

Ground-state and stability properties of ^288-308₁₁₈Og isotopes based on semi-microscopic calculations

NUCLEAR STRUCTURE ^{276,277,278,279,280,281,282,283,284,285,286,287,288,289,290,291,292,293}Og, ^{295,296,297,298,299,300,301,302,303,304,305,306,307,308}Og; calculated the ground-state masses, binding energy, deformations and fission barriers using the total energy surfaces produced in a multidimensional deformation space using the dynamical differential evolution optimization method, the Q-values of the different decay modes and the nucleon separation energies for each isotope, and its α-decay (Tα) and spontaneous fission T_1/2.

doi: 10.1016/j.aop.2018.12.002
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2019SE03      Int.J.Mod.Phys. E28, 1950009 (2019)

W.M.Seif, M.Ismail, I.A.M.Abdul-Magead, F.A.Fareed

Influence of the deformation and orientation on the interaction potential of the ²⁸Si + ²⁸Si system and its fusion process

NUCLEAR REACTIONS ²⁸Si(²⁸Si, X), E(cm)<40 MeV; calculated fusion σ. Comparison with available data.

doi: 10.1142/S0218301319500095
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2019SE05      Phys.Rev. C 99, 044311 (2019)

W.M.Seif, A.Adel

Additional hindrance of unfavored α decay between states of different parity

RADIOACTIVITY ^{228,229,230,231,232,233,234,235,236,237,238,239,240,241,242,244}Pu, ^{233,234,236,238,239,240,241,242,243,244,245,246,247,248,250}Cm, ^{237,238,240,241,242,243,244,245,246,247,248,249,250,251,252,253,254,256}Cf, ^{241,243,244,246,247,248,249,250,251,252,253,254,255,256,257}Fm(α); analyzed experimental values of half-lives for ground state to ground state α decays. ^{225,226,228,230}Th, ²⁵¹Cf, ²⁵⁵Fm, ²³⁵U, ²⁴¹Am, ²⁴⁷Cm(α); calculated decay widths, and α-preformation factors for favoured and unfavored decay modes of ground states to ground and excited states in daughter nuclides; deduced influence of parity configuration of the parent and daughter nuclei on the α-decay process. realistic M3Y-Paris and Skyrme-SLy4 effective nucleon-nucleon interactions, within the Wentzel-Kramers-Brillouin approximation.

doi: 10.1103/PhysRevC.99.044311
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2018SE01      Nucl.Phys. A969, 254 (2018)

W.M.Seif, L.H.Amer

Systematic investigation of cluster radioactivity for uranium isotopes

RADIOACTIVITY ^{217,218,219,220,221,222,223,224,225,226,227,228,229,230,231,232,233,234,235,236,237,238}U(α); calculated driving potential vs cluster charge, T_1/2 for α-decay and for cluster decay, α and cluster Q, T_1/2. Compared with measured T_1/2.

doi: 10.1016/j.nuclphysa.2017.10.004
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2018SE02      Chin.Phys.C 42, 014106 (2018)

W.M.Seif, A.Abdurrahman

Influence of proton-skin thickness on the α decays of heavy nuclei

RADIOACTIVITY ^{105,106,107,108,109,110,111}Te, ^{107,108,109,110,111,112,113}I, ^{109,110,111,112,113,114,115,116}Xe, ^{112,113,114,115,116,117,118}Cs, ^{113,114,115,116,117,118,119,120}Ba, ^{117,118,119,120,121,122,123}La, ^{119,120,121,122,123,124,125}Ce, ^{121,122,123,124,125,126,127}Pr, ^{124,125,126,127,128,129,130}Nd, ^{126,127,128,129,130,131,132}Pm, ^{128,129,130,131,132,133,134}Sm, ^{130,131,132,133,134,135,136}Eu, ^{133,134,135,136,137,138,139}Gd, ^{135,136,137,138,139,140,141}Tb, ^{138,139,140,141,142,143}Dy, ^{140,141,142,143,144,145,146}Ho, ^{142,143,144,145,146,147,148}Eu, ^{144,145,146,147,148,149,150,151}Tm, ^{148,149,150,151,152,153}Yb, ^{150,151,152,153,154,155}Lu, ^{153,154,155,156,157}Hf, ^{155,156,157,158,159}Ta, ^{157,158,159,160,161}W, ^{159,160,161,162,163}Re, ^{161,162,163,164,165,166}Os, ^{164,165,166,167,168}Ir, ^{166,167,168,169,170}Pt, ^{169,170,171,172}Au, ^{171,172,173,174,175}Hg, ^176,177Tl, ^178,179Pb(α); calculated T_1/2 in the framework of the preformed cluster model, with the Wentzel-Kramers-Brillouin penetration probability and assault frequency; deduced impact of proton-skin thickness.

doi: 10.1088/1674-1137/42/1/014106
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2018SE08      Chin.Phys.C 42, 064104 (2018)

W.M.Seif, A.S.Hashem

Constraints on the nuclear symmetry energy and its density slope from the α decay process

RADIOACTIVITY ¹⁰⁵Te, ²¹²Po(α); calculated T_1/2, preformation factors, neutron and proton skin thickness. Comparison with available data.

doi: 10.1088/1674-1137/42/6/064104
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2018SE10      Nucl.Phys. A975, 77 (2018)

W.M.Seif, Hi.Anwer

Sensitivity of the nuclear deformability and fission barriers to the equation of state

NUCLEAR STRUCTURE ²³⁰Th; calculated double-humped fission barriers vs quadrupole and multipole deformation, mass excess for gs, deformed and superdeformed state using different Skyrme forces.

doi: 10.1016/j.nuclphysa.2018.04.005
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2018SE17      J.Phys.(London) G45, 115101 (2018)

W.M.Seif, A.M.H.Abdelhady, A.Adel

Improved nucleus-nucleus folding potential with a repulsive core due to the change of intrinsic kinetic energy

RADIOACTIVITY ²¹²Po(α), ²³²U(²⁴Ne); analyzed available data; deduced folding potential improvements by considering the pivotal repulsive kinetic energy reduced the uncertainty inherent in the decay calculations at small internuclear distances.

doi: 10.1088/1361-6471/aae3d4
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2017IS01      Nucl.Phys. A958, 202 (2017)

M.Ismail, W.M.Seif, A.Adel, A.Abdurrahman

Alpha-decay of deformed superheavy nuclei as a probe of shell closures

RADIOACTIVITY Z=80-103, 111-122(α); calculated α-decay T_1/2 (also for daughter nuclei) using density-dependent cluster model based on M3Y-Reid NN interaction; deduced neutron and proton magic numbers. Compared with data.

doi: 10.1016/j.nuclphysa.2016.11.010
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2017SE07      J.Phys.(London) G44, 055102 (2017)

W.M.Seif, M.Ismail, E.T.Zeini

Preformation probability inside α emitters around the shell closures Z = 50 and N = 82

RADIOACTIVITY ^{105,106,107,108,109,110}Te, ¹¹¹I, ^{109,110,111,112,113}Xe, ¹¹²Cs, ¹¹⁴Ba, ¹⁴⁴Nd, ¹⁴⁵Pm, ^146,147,148Sm, ^147,148Eu, ^{148,149,150,151,152}Gd, ^{150,151,152,153,154}Dy, ^152,154Ho, ¹¹³I, ^{152,153,154,155,156}Er, ^{153,154,155,156}Tm, ^{154,155,156,157,158}Yb, ^155,156Lu, ^158,160Lu, ^{156,157,158,159,160}Hf, ¹⁶²Hf, ^158,160Ta, ¹⁶³Ta, ^{158,159,160,161,162,163,164,165,166,167,168}W, ^{160,161,162,163,164,165,166}Re, ^{161,162,163,164,165,166,167,168,169,170,171,172,173,174}Os, ¹⁸⁶Os, ^{166,167,168,169}Ir, ¹⁷⁷Ir, ^{166,167,168,169,170,171,172,173,174,175,176,177,178}Pt, ^{180,181,182,183,184}Pt, ^186,188,190Pt, ¹⁷⁰Au, ^172,173Au, ^175,177Au, ^183,184,185Au, ¹⁷²Hg, ^174,175,176Hg, ¹⁸⁰Hg, ^{182,183,184,185,186}Hg, ¹⁸⁸Hg, ¹⁷⁷Tl, ^179,180,181Tl, ¹⁸³Tl, ¹⁵¹Ho, ¹⁵³Ho, ¹⁵⁹Lu, ^157,159Ta, ^167,169Re, ^170,171Ir, ¹⁷³Ir, ¹⁸⁷Tl, ¹⁵⁷Lu(α); calculated T_1/2. Comparison with experimental data.

doi: 10.1088/1361-6471/aa6595
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2017SE19      Phys.Rev. C 96, 054328 (2017)

W.M.Seif, N.V.Antonenko, G.G.Adamian, H.Anwer

Correlation between observed α decays and changes in neutron or proton skins from parent to daughter nuclei

RADIOACTIVITY ^{105,106,107,108,109,110}Te, ^{107,108,109,110,111,112,113}I, ^{109,110,111,112,113,115}Xe, ^{124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,143,144,145,146,147,148,149}Nd, ^{133,134,135,136,137,138,139,143,145,146,147,148,149,150,151,152}Sm, ^{133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155}Gd, ^{148,149,150,151,152}Yb, ^{147,148,149,150,151,152,153,154,155,156,157,158,159,160,161,162,163,164,165,166}Ho, ^{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}Yb, ^{186,187,188,189,190,191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,208,209,210,211,212,213,214,215,216,217,218,219,220,211,222,223,224}Po, ^{212,213,214,215,216,217,218,219,220,211,222,223,224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,239,240,241}Pa, ^{241,242,243,244,245,246,247,248,249,250,251,252,253,254,255,256,257,258,259,260}Fm(α); calculated difference between the proton or neutron skin thicknesses, Q(α), partial α-decay half-lives for ^140-155Gd, ^232-241Pa and ^258-260Fm. Comparison with available experimental half-lives. Hartree-Fock-Bogoliubov (HFB) method based on the Skyrme-like effective interactions.

doi: 10.1103/PhysRevC.96.054328
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2016IS06      Int.J.Mod.Phys. E25, 1650026 (2016)

M.Ismail, W.M.Seif, M.M.Botros

Adiabatic and coupled channels calculations for near barrier fusion of ¹⁶O+²³⁸U using realistic nucleon-nucleon interaction

NUCLEAR REACTIONS ²³⁸U(¹⁶O, X)²⁵⁴Fm, E(cm) < 96 MeV; calculated σ, fusion barrier distribution using potentials derived from the DD M3Y-Reid NN force. Comparison with experimental data.

doi: 10.1142/S0218301316500269
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2016IS08      Phys.Rev. C 94, 024316 (2016)

M.Ismail, W.M.Seif, A.Abdurrahman

Relative stability and magic numbers of nuclei deduced from behavior of cluster emission half-lives

RADIOACTIVITY ²²¹Fr, ^{221,222,223,224,226}Ra, ²²⁵Ac(¹⁴C); ²²⁸Th(²⁰O); ²³⁰U(²²Ne); ²³¹Pa(²³F); ²³⁰Th, ²³¹Pa, ^232,233,234U(²⁴Ne); ²³⁵U(²⁵Ne); ²³⁴U(²⁶Ne); ^234,235U, ^236,238Pu(²⁸Mg); ²³⁸Pu(³⁰Mg), (³²Si); ²⁴²Cm(³⁴Si); calculated cluster preformation probabilities, decay widths. Z=85-122(¹⁴C), (²⁰O), (²⁰Ne), (²⁴Ne); calculated half-lives versus daughter neutron number for 7436 cluster decay processes. Density-dependent cluster model based on M3Y-ReidNN interaction; predicted magic neutron numbers at N=126, 148, 152, 154, 160, 162, 172, 176, 178, 180, 182, 184, and 200, and magic proton numbers at Z=82, 98, 100 102, 106, 108, 114, and 116. Comparison with available experimental data.

doi: 10.1103/PhysRevC.94.024316
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2016IS14      Eur.Phys.J. A 52, 317 (2016)

M.Ismail, W.M.Seif, A.S.Hashem

Ternary fission of ²⁶⁰No in equatorial configuration

RADIOACTIVITY ²⁶⁰No(SF); calculated possible channels of equatorial ternary fission using three-cluster model with three-body potential from folded M3Y-Reid nucleon-nucleon force plus Coulomb force with relative orientation of deformed heavy nuclei taken into account, considered even-mass clusters with mass from 4 to 52 as emitted light particles; deduced reaction Q-value, most probable equatorial ternary fission combinations.

doi: 10.1140/epja/i2016-16317-5
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2016SE08      J.Phys.(London) G43, 075101 (2016)

W.M.Seif, M.Ismail, A.I.Refaie, L.H.Amer

Optimum orientation versus orientation averaging description of cluster radioactivity

RADIOACTIVITY ^232,233U(α), (²⁴Ne), (²⁸Mg), ²³⁴U(α), (²⁴Ne), (²⁶Ne), (²⁸Mg), ²³⁶Pu(α), (²⁸Mg), ²³⁸Pu(α), (²⁸Mg), (³⁰Mg), (³²Si); calculated T_1/2. Comparison with available data.

doi: 10.1088/0954-3899/43/7/075101
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2015IS05      Phys.Rev. C 92, 014311 (2015)

M.Ismail, W.M.Seif, A.Y.Ellithi, A.Abdurrahman

Single universal curve for α decay derived from semi-microscopic calculations

RADIOACTIVITY A=105-294, Z=52-118(α); deduced single universal curve for α decay from parametrization of available experimental α-decay half-lives and Q values for 496 nuclei, and semi-microscopic calculations based on realistic Michigan-three-Yukawa Reid nucleon-nucleon interaction.

doi: 10.1103/PhysRevC.92.014311
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2015SE01      Phys.Rev. C 91, 014322 (2015)

W.M.Seif

Nucleon pairing correlations and the α cluster preformation probability inside heavy and superheavy nuclei

RADIOACTIVITY ^{175,179,183,185}Hg, ^177,179Tl, ¹⁹¹Pb, ^{191,193,195,197,199,201,205,207,213,215,217}Po, ^{196,197,198,199,200,201,202,203,204,205,207,208,209,211,213,214,215,216,217,218,219}At, ^{195,197,199,201,203,207,209,215,217}Rn, ^{199,200,201,202,203,204,205,206,207,208,209,211,213,215,216,217,218,219}Fr, ^{203,205,209,211,217}Ra, ^{215,217,218,219,221,222,227}Ac, ²¹⁹Th, ^{217,219,220,221,223,227,231}Pa, ^229,233U, ^231,235Pu, ²³³Cm, ^239,245Cf, ^{241,243,251,253}Es, ²⁵¹No, ²⁵³Lr, ²⁶³Sg, ^265,269Hs, ²⁸¹Ds, ²⁷²Rg, ²⁸⁹Fl(α); calculated α-decay partial half-lives, α-preformation probabilities. Extended cluster model of α decay and the WKB approximation, α + daughter interaction potential with the Hamiltonian energy-density approach in terms of Skyrme-like (SLy4) interaction. Used β₂, β₃, β₄, and β₆ deformation parameters for daughter nuclides. Comparison with experimental values.

doi: 10.1103/PhysRevC.91.014322
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2015SE14      Phys.Rev. C 92, 044302 (2015)

W.M.Seif, M.M.Botros, A.I.Refaie

Preformation probability inside α emitters having different ground state spin-parity than their daughters

RADIOACTIVITY ^149,151Tb, ^173,177,181Hg, ¹⁸⁰Tl, ^{179,181,183,185,187,189}Pb, ^{184,186,187,188,189,190,191,192,193,194,195,196,209,211,212,213}Bi, ^{189,203,209,211}Po, ^{194,195,210,212,220}At, ^{193,205,211,213,219,221}Rn, ^{210,212,214,220,221}Fr, ^{207,213,215,219,221,223}Ra, ^{210,214,216,220,223,224,225,226}Ac, ^{209,211,215,217,221,223,225,227,229}Th, ^{224,225,228,229,230}Pa, ^{217,219,223,225,227,231,235}U, ^{227,229,231,235,236,237}Np, ^{229,233,237,239,241}Pu, ^{235,239,240,241,243}Am, ^{239,241,243,245,247}Cm, ^{243,244,245,247,249}Bk, ^{237,247,249,251,253}Cf, ^{245,246,252,254,255}Es, ^{243,245,247,249,251,253,255,257}Fm, ^{247,249,251,255,256,257,258}Md, ^{253,255,257,257}No, ^255,257,259Lr, ^{255,257,259,261}Rf, ^257,259Db, ^259,261,265Sg, ²⁶¹Bh, ^263,267Hs, ^{267,269,271,273,277}Ds, ^277,281,285Cn(α); calculated preformation probabilities S(_α), half-lives for ground state to ground state unfavored α decays. Extended cluster model, with the Wentzel-Kramers-Brillouin penetrability and assault frequency, and Hamiltonian energy density scheme based on the Skyrme SLy4 interaction. Comparison with experimental values.

doi: 10.1103/PhysRevC.92.044302
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2015SE15      Int.J.Mod.Phys. E24, 1550083 (2015)

W.M.Seif, H.Mansour

Systematics of nucleon density distributions and neutron skin of nuclei

NUCLEAR STRUCTURE A=16-304; analyzed proton and neutron density profiles of 760 nuclei; deduced formulae to fit the resulting radii and diffuseness data.

doi: 10.1142/S0218301315500834
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2014SE05      Phys.Rev. C 89, 028801 (2014)

W.M.Seif, D.N.Basu

Higher-order symmetry energy of nuclear matter and the inner edge of neutron star crusts

doi: 10.1103/PhysRevC.89.028801
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2013IS08      Can.J.Phys. 91, 401 (2013)

M.Ismail, W.M.Seif, A.Y.Ellithi, A.S.Hashem

(A = 10)-Accompanied spontaneous ternary fission of californium isotopes

RADIOACTIVITY ^{238,240,242,244,246,248,250,252,254,256}Cf(SF); calculated ternary fission Q-values. ¹⁰Be; deduced fragment mass distributions. Three-cluster model based on three different nuclear interactions, namely, the Yukawa-exponential, the folding model with Migdal force, and the proximity potentials.

doi: 10.1139/cjp-2012-0549
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2013SE17      J.Phys.(London) G40, 105102 (2013)

W.M.Seif

The α decay spectroscopic factor of heavy and superheavy nuclei

RADIOACTIVITY ¹⁴⁴Nd, ^146,148Sm, ^148,150,152Gd, ^150,152,154Dy, ^152,154,156Er, ^154,156,158Yb, ^{156,158,160,162}Hf, ^{158,160,162,164,166,168}W, ^{162,164,166,168,170,172,174}Os, ¹⁸⁶Os, ^{166,168,170,172,174,176,178,180,182,184,186,188,190}Pt, ^{172,174,176,178,180,182,184,186,188}Hg, ^{178,180,182,184,186,188,190,192,194,196,198,200,202,204,206,208,210}Pb, ^{188,190,192,194,196,198,200,202,204,206,208,210,212,214,216,218}Po, ^{196,198,200,202,204,206,208,210,212,214,216,218,220,222}Rn, ^{202,204,206,208,210,212,214,216,218,220,222,224,226}Ra, ^{210,212,214,216,218,220,222,224,226,228,230,232}Th, ^{218,220,222,224,226,228,230,232,234,236,238}U, ^{238,240,242,244}Pu, ^{238,240,242,244,246,248,250}Cm, ^{240,242,244,246,248,250,252,254}Cf, ^{246,248,250,252,254,256}Fm, ^{252,254,256,258}No, ^256,258,260Rf, ²⁶⁰Sg, ²⁶⁶Sg, ^{264,266,268,270}Hs, ²⁷⁰Ds, ^286,288Fl, ^290,292Lv, ²⁹⁴Og(α); calculated T_1/2, spectroscopic factor. Comparison with experimental data.

doi: 10.1088/0954-3899/40/10/105102
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2012AD01      Nucl.Phys. A876, 119 (2012)

A.Adel, V.A.Rachkov, A.V.Karpov, A.S.Denikin, M.Ismail, W.M.Seif, A.Y.Ellithi

Effect of neutron rearrangement on subbarrier fusion reactions

NUCLEAR REACTIONS ⁷Li(⁵⁴Cr, X), ⁹Li(⁵²Cr, X), E(cm)=7-14 MeV;¹¹Li(⁵⁰Cr, X), E(cm)=5-14 MeV;¹⁶O(⁵²Cr, X), ¹⁸O(⁵⁰Cr, X), E(cm)=24-30 MeV;¹⁶O(¹¹⁶Sn, X), ¹⁸O(¹¹⁴Sn, X), E(cm)=45-63 MeV;³²S(⁵⁸Ni, X), (⁶⁴Ni, X), E(cm)=52-74 MeV;⁴⁰Ca(⁴⁸Ca, X), E(cm)=46-58 MeV;⁴⁰Ca(¹²⁴Sn, X), E(cm)=106-130 MeV;⁴⁸Ca(⁵⁰Cr, X), ⁴⁴Ca(⁵⁴Cr, X), E(cm)=56-66 MeV;⁵⁸Ni(⁵⁸Ni, X), (⁶⁴Ni, X), E(cm)=88-114 MeV; calculated fusion σ using empirical channel coupling with neutron transfer.

doi: 10.1016/j.nuclphysa.2012.01.004
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2012SE02      Nucl.Phys. A878, 14 (2012)

W.M.Seif

Saturation properties of isospin asymmetric nuclear matter

doi: 10.1016/j.nuclphysa.2011.12.012
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2011IS11      Nucl.Phys. A872, 25 (2011)

M.Ismail, W.M.Seif

Prediction of accidental cancellation of different deformation components and optimum fusion orientations

NUCLEAR REACTIONS ²⁴⁴Pu(⁴⁸Ca, X), E not given; calculated orientations of colliding nuclei for different β₂, β₃, β₄; deduced fusion barrier height, fusion radius using density dependent BDM3Y1-Paris NN interaction. Also considered β₆, β₈ deformations. Comparison with data.

doi: 10.1016/j.nuclphysa.2011.09.009
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2011SE01      J.Phys.(London) G38, 035102 (2011)

W.M.Seif

Nuclear matter equation of state using density-dependent M3Y nucleon-nucleon interactions

doi: 10.1088/0954-3899/38/3/035102
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2011SE13      Phys.Rev. C 84, 064608 (2011)

W.M.Seif, M.Shalaby, M.F.Alrakshy

Isospin asymmetry dependence of the α spectroscopic factor for heavy nuclei

RADIOACTIVITY ¹⁵²Er, ^154,156Yb, ^156,158Hf, ^158,164W, ¹⁶²Os, ²¹⁰Pb, ^{192,194,196,198,200,202,204,206,208,210,212,214,216}Po, ^{200,202,204,206,208,210,212,214,216,218,220,222}Rn, ^216,218,220Ra, ^218,220Th, ²²⁰U; calculated half-lives, spectroscopic factors. Density-dependent cluster model with microscopic α-daughter nuclear interaction potential calculated in the framework of the Hamiltonian energy density approach based on the SLy4 Skyrme-like effective interaction. N_pN_n scheme. Comparison with experimental data.

doi: 10.1103/PhysRevC.84.064608
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2010IS02      Phys.Rev. C 81, 034607 (2010)

M.Ismail, W.M.Seif

Simple interpretation of nuclear orientation for Coulomb barrier distributions derived from a realistic effective interaction

NUCLEAR REACTIONS ²⁴⁴Pu(⁴⁸Ca, X), E not given; calculated Coulomb barrier heights and radii of the interacting pair as function of quadrupole, octupole and hexadecapole deformations of the target nucleus. Double-folding procedure for the interaction of pair of spherical and deformed nuclei.

doi: 10.1103/PhysRevC.81.034607
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2009IS03      Nucl.Phys. A828, 333 (2009)

M.Ismail, W.M.Seif, M.M.Botros

Effect of octupole and higher deformations on Coulomb barrier

NUCLEAR REACTIONS ²⁴⁴Pu(⁴⁸Ca, X)292114, E≈3-5 MeV/nucleon; calculated Coulomb barrier height/position using a double-folding model including effect of deformation.

doi: 10.1016/j.nuclphysa.2009.07.013
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2008SE11      Eur.Phys.J. A 38, 85 (2008)

W.M.Seif

Probing the equation of state for cold nuclear matter in fusion reactions

NUCLEAR REACTIONS ¹⁴⁴Sm(¹⁶O, X), E(cm)=55-91 MeV; ⁹⁶Zr(¹⁶O, X), E(cm)=37-70 MeV; ²⁰⁸Pb(¹⁶O, X), E(cm)=70-110 MeV; analyzed fusion barrier distribution; ¹⁶O(¹⁶O, X), E(cm)=7-14 MeV; ⁴⁰Ca(⁴⁰Ca, X), E(cm)=48-68 MeV; ⁴⁸Ca(⁴⁸Ca, X), E(cm)=48-60 MeV; analyzed fusion σ; ⁹⁰Zr(⁴⁰Ca, X), E not given; ¹⁴⁸Sm(¹⁶O, X), E not given; deduced fusion barrier height. Compared Skyrme and density-dependent Paris effective interactions.

doi: 10.1140/epja/i2008-10643-1
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2006IS05      Phys.Atomic Nuclei 69, 1463 (2006)

M.Ismail, W.M.Seif, H.Abou-Shady, A.Bakry

Study of Coulomb Interaction for Two Diffuse Spherical-Deformed Nuclei

NUCLEAR REACTIONS ²³⁸U(¹⁶O, X), E not given; calculated Coulomb coupling form factors, finite diffuseness effects.

doi: 10.1134/S1063778806090055
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2006SE02      Nucl.Phys. A767, 92 (2006)

W.M.Seif

The fusion cross section and energy dependence of the potential radius

NUCLEAR REACTIONS ²⁰⁸Pb(¹⁶O, X), E(cm)=70-110 MeV; analysed fusion σ, elastic σ(θ); ⁸⁹Y(⁶⁰Ni, X), E(cm)=122-136 MeV; ⁶⁴Ni(⁶⁴Ni, X), E(cm)=86-108 MeV; ⁵⁸Ni(⁵⁸Ni, X), E(cm)=93-109 MeV; ⁹⁶Zr(¹⁶O, X), E(cm)=37-70 MeV; ¹⁴⁴Sm(¹⁶O, X), E(cm)=56-90 MeV; ⁹²Zr(¹²C, X), E(cm)=28-44 MeV; ¹⁵⁴Sm(¹⁶O, X), E(cm)=52-100 MeV; ²³⁸U(¹⁶O, X), E(cm)=70-95 MeV; ¹⁸⁶W(¹⁶O, X), E(cm)=62-92 MeV; analysed fusion σ; deduced effect of energy-dependent radius. Energy dependent potential radius model.

doi: 10.1016/j.nuclphysa.2005.12.011
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2006SE12      Phys.Rev. C 74, 034302 (2006)

W.M.Seif

α decay as a probe of nuclear incompressibility

NUCLEAR STRUCTURE Z=54-118; A=112-294; analyzed α-decay T_1/2, Qα; deduced nuclear matter incompressibility. Superasymmetric fission model.

doi: 10.1103/PhysRevC.74.034302
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2005IS14      Phys.Rev. C 72, 064616 (2005)

M.Ismail, W.M.Seif, M.M.Osman, H.El-Gebaly, N.M.Hassan

Orientation dependence of the heavy-ion potential between two deformed nuclei

NUCLEAR REACTIONS ²³⁸U(²³⁸U, X), E(cm)=640-840 MeV; calculated interaction potential, fusion σ, deformation and orientation dependence. Hamiltonian energy density approach.

doi: 10.1103/PhysRevC.72.064616
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2004IS01      Phys.Rev. C 69, 014606 (2004)

M.Ismail, M.M.Osman, H.El-Gebaly, F.Salah, W.M.Seif

Effect of in-medium NN cross section and finite range force on the reaction cross section for a deformed target nucleus

NUCLEAR REACTIONS ²³⁸U(¹²C, X), E=100, 400, 700 MeV/nucleon; calculated reaction σ, effect of in-medium NN interaction, orientation and deformation dependence.

doi: 10.1103/PhysRevC.69.014606
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2003IS04      Phys.Lett. B 563, 53 (2003)

M.Ismail, W.M.Seif, H.El-Gebaly

On the Coulomb interaction between spherical and deformed nuclei

NUCLEAR REACTIONS ²³⁸U(¹⁶O, X), E not given; calculated Coulomb potential, deformation and orientation effects.

doi: 10.1016/S0370-2693(03)00600-2
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