NSR Query Results
Output year order : Descending NSR database version of April 26, 2024. Search: Author = M.Kowal Found 51 matches. 2023JA12 Phys.Rev. C 108, 064309 (2023) P.Jachimowicz, M.Kowal, J.Skalski Candidates for three-quasiparticle K isomers in odd-even Md-Rg nuclei
doi: 10.1103/PhysRevC.108.064309
2022CA11 Phys.Rev. C 105, L051601 (2022) T.Cap, M.Kowal, K.Siwek-Wilczynska Diffusion as a possible mechanism controlling the production of superheavy nuclei in cold fusion reactions NUCLEAR REACTIONS 208Pb(48Ca, X), E(cm)=160-225 MeV; 208Pb(50Ti, X), E(cm)=180-245 MeV; 208Pb(54Cr, X), E(cm)=190-265; calculated fusion σ(E), averaged fusion probability. Discussed role of the difference in values of the rotational energies in the fusion saddle point and contact (sticking) configuration of the projectile-target system. Fusion-by-diffusion model (FbD). Injection point systematics obtained for the set of 1n cold fusion reactions on 207Pb, 208Pb, 209Bi targets. Comparison to experimental data.
doi: 10.1103/PhysRevC.105.L051601
2022CA26 Eur.Phys.J. A 58, 231 (2022) T.Cap, M.Kowal, K.Siwek-Wilczynska The Fusion-by-Diffusion model as a tool to calculate cross sections for the production of superheavy nuclei NUCLEAR REACTIONS 208Pb, 238U, 248Cm(48Ca, X), 208Pb(50Ti, X), E(cm)<230 MeV; analyzed available data; deduced the injection point systematics obtained for the set of cold and hot fusion reactions, the internal fusion barriers, averaged survival and fusion probabilities, fusion σ within the Fusion-by-Diffusion (FBD) model using the new nuclear data tables by Jachimowicz et al. (At Data Nucl Data Tables 138, 101393, 2021).
doi: 10.1140/epja/s10050-022-00891-8
2022HO12 Phys.Rev. C 106, 014614 (2022) J.Hong, G.G.Adamian, N.V.Antonenko, M.Kowal, P.Jachimowicz Isthmus connecting mainland and island of stability of superheavy nuclei NUCLEAR REACTIONS 245,248Cm, 242,244Pu, 238U, 232Th, 226Ra(48Ca, n), (48Ca, 2n), (48Ca, 3n), (48Ca, 4n), (48Ca, 5n), E*=10-70 MeV; calculated σ(E), excitation functions. Comparison to available experimental data.
doi: 10.1103/PhysRevC.106.014614
2022HO13 Eur.Phys.J. A 58, 180 (2022) J.Hong, G.G.Adamian, N.V.Antonenko, M.Kowal, P.Jachimowicz Hot and cold fusion reactions leading to the same superheavy evaporation residue NUCLEAR REACTIONS 233,235U(48Ca, X)277Cn, E not given; calculated σ; deduced the possibility of filling the gap between the isotopes of superheavy nuclei with Z=112 produced in cold and hot fusion reactions. Comparison with available data.
doi: 10.1140/epja/s10050-022-00826-3
2022RA06 Phys.Rev. C 105, 044328 (2022) A.Rahmatinejad, T.M.Shneidman, G.G.Adamian, N.V.Antonenko, P.Jachimowicz, M.Kowal Energy dependent ratios of level-density parameters in superheavy nuclei NUCLEAR STRUCTURE 282,283,284,285,286,287,288,289,290,291,292,293,294,295Mc, 283,284,285,286,287,288,289,290,291,292,293,294,295,296Lv, 279,280,281,282,283,284,285,286,287,288,289,290,291Nh, 291,292,293,294,295,296,297,298Ts, 291,292,293,294,295,296,297,298,299Og, 292Fl, 295,296,297,298,299,300119, 295,296,297,298,299,300,301,302120; calculated intrinsic nuclear level densities, energy-dependent level-density parameters, energy-dependent ratios of level-density parameters corresponding to the nuclei at the fission saddle point and to proton and α-particle emission residues at their ground state to those obtained for the daughter nuclei after neutron emission. Thermodynamic superfluid formalism using the single-particle energies obtained from the diagonalization of the deformed Woods-Saxon potential.
doi: 10.1103/PhysRevC.105.044328
2021GO26 Eur.Phys.J. A 57, 321 (2021) T.Goigoux, Ch.Theisen, B.Sulignano, M.Airiau, K.Auranen, H.Badran, R.Briselet, T.Calverley, D.Cox, F.Dechery, F.Defranchi Bisso, A.Drouart, Z.Favier, B.Gall, T.Grahn, P.T.Greenlees, K.Hauschild, A.Herzan, R.-D.Herzberg, U.Jakobsson, R.Julin, S.Juutinen, J.Konki, M.Leino, A.Lightfoot, A.Lopez-Martens, A.Mistry, P.Nieminen, J.Pakarinen, P.Papadakis, J.Partanen, P.Peura, P.Rahkila, E.Rey-Herme, J.Rubert, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, J.Sorri, S.Stolze, J.Uusitalo, M.Vandebrouck, A.Ward, M.Zielinska, P.Jachimowicz, M.Kowal, J.Skalski First observation of high-K isomeric states in 249Md and 251Md RADIOACTIVITY 249,251Md(IT) [from 203Tl(48Ca, 2n)249Md, E=219 MeV; 205Tl(48Ca, 2n)251Md, E=218 MeV]; measured decay products, Eα, Iα, Eβ, Iβ, Eγ, Iγ, β-α-coin.; deduced level energies, J, π, 3 quasi-particle high-K states, isomeric states T1/2. Comparison theoretical calculations. SAGE spectrometer, the K130 cyclotron at the Accelerator Laboratory of the University of Jyvaskyla.
doi: 10.1140/epja/s10050-021-00631-4
2021HO08 Phys.Rev. C 103, L041601 (2021) J.Hong, G.G.Adamian, N.V.Antonenko, P.Jachimowicz, M.Kowal Rate of decline of the production cross section of superheavy nuclei with Z = 114-117 at high excitation energies NUCLEAR REACTIONS 242,244Pu(48Ca, n), (48Ca, 2n), (48Ca, 3n), (48Ca, 4n), E*=10-65 MeV; 242,244Pu, 243Am, 248Cm, 249Bk(48Ca, 5n), (48Ca, 6n), (48Ca, 7n), (48Ca, 8n), (48Ca, 9n), E*=40-120 MeV; calculated σ(E) using microscopic-macroscopic (MM) method, and compared with available experimental data for superheavy nuclei (SHN). NUCLEAR STRUCTURE 290Ts; calculated potential energy surface (PES) in (β20, β22) plane. 286,287,288,289,290,291,292,293,294,295,296,297,298Fl, 287,288,289,290,291,292,293,294,295,296,297,298,299Mc, 288,289,290,291,292,293,294,295,296,297,298,299,300Lv, 289,290,291,292,293,294,295,296,297,298,299,300,301Ts; calculated fission barriers and S(n) using microscopic-macroscopic (MM) method, and standard BCS method with blocking for nuclei with odd numbers of protons, neutrons, or both.
doi: 10.1103/PhysRevC.103.L041601
2021JA01 At.Data Nucl.Data Tables 138, 101393 (2021) P.Jachimowicz, M.Kowal, J.Skalski Properties of heaviest nuclei with 98 ≤ Z ≤ 126 and 134 ≤ N ≤ 192 NUCLEAR STRUCTURE Z=96-126; calculated ground-state and saddle-point shapes and masses, ground-state mass excess, nucleon separation- and energies, total, macroscopic (normalized to the macroscopic energy at the spherical shape) and shell corrections energies, and deformations within the microscopic-macroscopic method with the deformed Woods-Saxon single-particle potential and the Yukawa-plus-exponential macroscopic energy taken as the smooth part.
doi: 10.1016/j.adt.2020.101393
2021RA04 Phys.Rev. C 103, 034309 (2021) A.Rahmatinejad, A.N.Bezbakh, T.M.Shneidman, G.Adamian, N.V.Antonenko, P.Jachimowicz, M.Kowal Level-density parameters in superheavy nuclei NUCLEAR STRUCTURE 296Lv; calculated potential energy contour in the (β20, β22) plane, proton and neutron single-particle spectra along the fission paths using the Woods-Saxon potential diagonalization. 292Fl, 296Lv, 300120; calculated energy dependencies of the ground-state and saddle-point level-density parameters. A=277-302; calculated mass number dependence of the asymptotic ground state and saddle-point level-density parameters. 282,283,284,285,286,287,288,289,290,291,292Fl; calculated ratios of the level density parameters at the saddle point and ground state. 236U, 240Pu; calculated dependence of fission probability on excitation energy for the fissioning nuclei. 293,294,295,296,297Ts, 295,296,297,298,299,300,301,302120; calculated ratios of the level density parameter of the mother nucleus at the saddle point to that of the daughter nucleus after neutron separation at the ground state. 278Cn, 294Og, 296,298120; calculated dependence of neutron emission probability on excitation energy. Level density parameter calculated by fitting the obtained results with the standard Fermi gas expression.
doi: 10.1103/PhysRevC.103.034309
2020HO13 Phys.Lett. B 809, 135760 (2020) J.Hong, G.G.Adamian, N.V.Antonenko, P.Jachimowicz, M.Kowal Possibilities of direct production of superheavy nuclei with Z=112-118 in different evaporation channels NUCLEAR REACTIONS 242,244Pu, 243Am, 245,248Cm, 249Bk, 249,252Cf(48Ca, X), E not given; analyzed available data. 276,277,278,279,280,281,282,283,284,285,286,287,288Cn, 280,281,282,283,284,285,286,287,288,289,290,291,292Fl, 286,287,288,289,290,291,292,293,294,295,296Lv, 291,292,293,294,295,296,297,298,299Og, 279,280,281,282,283,284,285,286,287,288,289,290,291Nh, 285,286,287,288,289,290,291,292,293,294,295Mc, 291,292,293,294,295,296,297,298Ts; deduced theoretical barriers and energy thresholds n the evaporation channels with emission of proton and alpha-particle.
doi: 10.1016/j.physletb.2020.135760
2020JA01 Phys.Rev. C 101, 014311 (2020) P.Jachimowicz, M.Kowal, J.Skalski Static fission properties of actinide nuclei NUCLEAR STRUCTURE 226,227,228Ac, 227,228,229,230,231,232,233,234Th, 230,231,232,233,234Pa, 231,232,233,234,235,236,237,238,239,240U, 233,234,235,236,237,238,239Np, 235,236,237,238,239,240,241,242,243,244,245,246Pu, 239,240,241,242,243,244,245,246,247Am, 241,242,243,244,245,246,247,248,249,250Cm, 244,245,246,247,248,249,250Bk, 250,251,252,253Cf; calculated masses of the ground states, first- and second-fission barriers heights, excitation energies of superdeformed (SD) isomeric minima, quadrupole deformation for SD minimum, energy surface contours in (β20, β30) plane for 227Ac, 227,228,229,231,233Th, 235U, 251Cf. Microscopic-macroscopic Woods-Saxon model with State-of-the-art methods. Comparison with experimental data. Discussed the "thorium anomaly".
doi: 10.1103/PhysRevC.101.014311
2019SI19 Phys.Rev. C 99, 054603 (2019) K.Siwek-Wilczynska, T.Cap, M.Kowal Exploring the production of new superheavy nuclei with proton and α-particle evaporation channels NUCLEAR REACTIONS 249Bk(50Ti, 2n), (50Ti, 3n), (50Ti, 4n)295119/296119/297119, E(cm)=206-244 MeV; 254Es(48Ca, 2n), (48Ca, 3n), (48Ca, 4n), (48Ca, 5n)297119/298119/299119/300119, E(cm)=196-234 MeV; 248Cm(51V, 3n), (51V, 4n), (51V, 5n), (51V, 6n)293119/294119/295119/296119, E(cm)=216-264 MeV; 248Cm(54Cr, 2n), (54Cr, 3n), (54Cr, 4n)298120/299120/300120, E(cm)=220-260 MeV; 242Pu(48Ca, np), (48Ca, 2np), (48Ca, 3np)286Nh/287Nh/288Nh, E(cm)=190-222 MeV; 244Pu(48Ca, np), (48Ca, 2np), (48Ca, 3np)288Nh/289Nh/290Nh, E(cm)=190-220 MeV; 248Cm(48Ca, np), (48Ca, 2np), (48Ca, 3np)292Mc/293Mc/294Mc, E(cm)=190-222 MeV; 249Bk(48Ca, np), (48Ca, 2np), (48Ca, 3np)293Lv/294Lv/295Lv, E(cm)=190-222 MeV; 249,250,251,252Cf(48Ca, xnp)295Ts/296Ts/297Ts, E(cm)=200-228 MeV; 244Pu(48Ca, nα), (48Ca, 2nα), (48Ca, 3nα)285Cn/286Cn/287Cn, E(cm)=186-214 MeV; 248Cm(48Ca, nα), (48Ca, 2nα), (48Ca, 3nα)289Fl/290Fl/291Fl, E(cm)=190-224 MeV; 249Bk(48Ca, nα), (48Ca, 2nα), (48Ca, 3nα)290Mc/291Mc/292Mc, E(cm)=196-226 MeV; 251Cf(48Ca, nα), (48Ca, 2nα), (48Ca, 3nα)292Lv/293Lv/294Lv, E(cm)=196-226 MeV; calculated production σ(E) for superheavy nuclides using fusion-by-diffusion model (FDB). Z=114-118; systematics of experimental values of the injection point distance parameter sinj as a function of the kinetic energy excess above the mean barrier.
doi: 10.1103/PhysRevC.99.054603
2018BR12 Acta Phys.Pol. B49, 621 (2018) W.Brodzinski, M.Kowal, J.Skalski, P.Jachimowicz Fission of SHN and Its Hindrance: Odd Nuclei and Isomers NUCLEAR REACTIONS 132Ba(58Ni, 58Ni'), E-175 MeV; measured Coulomb excitation Eγ, Iγ, γγ-coin of 132Ba using Gamma Detector Array (GDA); deduced Doppler-shift-corrected γ-ray energy spectrum in coincidence with scattered 58Ni detected in PPAC, γ-ray spectrum in coinc with Ba recoils detected in PPAC, B(E2) values between specified 132Ba states using GSI Object Oriented On-line Off-line (GO4) software package; compared with earlier Coulomb excitation measurements.
doi: 10.5506/aphyspolb.49.621
2018JA11 Phys.Rev. C 98, 014320 (2018) P.Jachimowicz, M.Kowal, J.Skalski Hindered α decays of heaviest high-K isomers NUCLEAR STRUCTURE 254,256,258,260,262,264,266,268,270,272,274Sg, 256,258,260,262,264,266,268,270,272,274,276Hs, 258,260,262,264,266,268,270,272,274,276,278Ds, 260,262,264,266,268,270,272,274,276,278,280Cn; calculated excitation energy of two-proton, two-neutron, and two-proton plus two-neutron configuration using microscopic-macroscopic approach with the deformed Woods-Saxon potential. RADIOACTIVITY 260,262,264,266,268,270,272,274,276,278Ds(α); calculated Q(α) values, half-lives of α emitters, α-hindrance factors for decays of ground states and high-K isomers. 262,264,266,268,270,272,274,276,278,280Cn(α); calculated hindrance factors for α transitions between states of the same high-K values; deduced strong hindrance against decay for four-quasiparticle states with high Kπ, and that α-decay hindrances results mainly from the proton 2-qp component. Microscopic-macroscopic approach with the deformed Woods-Saxon potential.
doi: 10.1103/PhysRevC.98.014320
2017JA01 Phys.Rev. C 95, 014303 (2017) P.Jachimowicz, M.Kowal, J.Skalski Adiabatic fission barriers in superheavy nuclei NUCLEAR STRUCTURE 252Lr, 270Db, 276Mt, 280Cn, 297119, 285122; calculated potential energy surfaces (PES) in (β20, β22) plane. Z=109, A=266-269; Z=110, A=267-272; Z=111, A=268-277; Z=112, A=269-279; Z=113, A=268-281; Z=114, A=269-282; Z=115, A=272-285; Z=116, A=271-285; Z=117, A=274-286; Z=118, A=281-286; Z=119, A=284-290; Z=120, A=285-289; Z=121, A=286-291; Z=122, A=286-291; Z=123, A=289-290; Z=124, A=289-291; calculated mass-asymmetry (reflection-asymmetry) effect on the fission saddle from the minimization (MIN) and from the imaginary water flow method (IWF). Z=119, A=274-281, 289, 291, 293, 294, 295; Z=120, A=276-283; Z=121, A=278-283; Z=122, A=280-286, 291, 292; Z=123, A=282-287, 291, 292; Z=124, A=284-294; Z=125, A=286-295; Z=126, A=288-298; calculated lowering of the saddle by the nonaxial hexadecapole deformation. Z=98, A=232-290; Z=99, A=234-291; Z=100, A=236-292; Z=101, A=238-293; Z=102, A=240-294; Z=103, A=242-295; Z=104, A=244-296; Z=105, A=246-297; Z=106, A=248-298; Z=107, A=250-299; Z=108, A=252-300; Z=109, A=254-301; Z=110, A=256-302; Z=111, A=258-303; Z=112, A=260-304; Z=113, A=262-305; Z=114, A=264-306; Z=115, A=266-307; Z=116, A=268-308; Z=117, A=270-309; Z=118, A=272-310; Z=119, A=274-311; Z=120, A=276-312; Z=121, A=278-313; Z=122, A=280-314; Z=123, A=282-315; Z=124, A=284-316; Z=125, A=286-317; Z=126, A=288-318; calculated fission-barrier heights and isotopic dependence of fission barriers for 1305 heavy and superheavy nuclei. Macroscopic-microscopic method with Woods-Saxon model.
doi: 10.1103/PhysRevC.95.014303
2017JA06 Phys.Rev. C 95, 034329 (2017) P.Jachimowicz, M.Kowal, J.Skalski Effect of non-axial octupole shapes in heavy and superheavy nuclei NUCLEAR STRUCTURE Z=82-126, N=96-192; calculated tetrahedral deformation β32 for about 3000 heavy and superheavy nuclei, energy minima with a nonzero tetrahedral distortion; deduced evidence for combined oblate-plus-β33 g.s. deformation in a restricted region of superheavy nuclei, but no evidence for stable tetrahedral shapes, 219Po, 296123, 305124; calculated energy landscapes in (β20, β22), (β20, β30), and (β20, β32) planes. Microscopic-macroscopic model based on deformed Woods-Saxon potential.
doi: 10.1103/PhysRevC.95.034329
2015BA54 Nucl.Phys. A944, 442 (2015) A.Baran, M.Kowal, P.-G.Reinhard, L.M.Robledo, A.Staszczak, M.Warda Fission barriers and probabilities of spontaneous fission for elements with Z ≥ 100 NUCLEAR STRUCTURE 258Fm, 262No, 266Rf, 270Sg, 274Hs, 278Ds, 282Cn, 286Fl, 290,292,294,296,298,300,302,304Lv; calculated fission barriers vs quadrupole moment; revised previous paper by different quadrupole moment definition. 266Hs; calculated fission barriers vs quadrupole moment using MM model, Skyrme HFB approach, Gogny HF model.
doi: 10.1016/j.nuclphysa.2015.06.002
2015JA05 Phys.Rev. C 92, 044306 (2015) P.Jachimowicz, M.Kowal, J.Skalski Candidates for long-lived high-K ground states in superheavy nuclei RADIOACTIVITY Z=102-118, N=145-175(α); 250,252Md, 252,254,256,257,260Lr, 258Db, 269Sg, 264,270Bh, 271Hs, 266,267,268,269,270,271,272,273,274,275,276,278Mt, 273Ds, 272,274,280Rg(α); calculated apparent Qα values, T1/2 for Mt isotopes; predicted high-K ground states in superheavy (SH) nuclei. Macroscopic-microscopic model based on the deformed Woods-Saxon single-particle potential. NUCLEAR STRUCTURE 250,252Md, 252,254,256,257,260Lr, 258Db, 269Sg, 264,270Bh, 271Hs, 266,267,268,269,270,271,272,273,274,275,276,278Mt, 273Ds, 272,274,280Rg; predicted high-K ground states in superheavy (SH) nuclei On the basis of systematic calculations for 1364 heavy and superheavy (SH) nuclei. 272Mt; predicted especially promising candidate for long-lived high-K ground state from multidimensional hypercube configuration-constrained calculations of the potential energy surfaces (PESs). Macroscopic-microscopic model based on deformed Woods-Saxon single-particle potential and Yukawa plus exponential macroscopic energy with seven mass-and axially-symmetric deformations, β20, β30, β40, β50, β60, β70 and β80.
doi: 10.1103/PhysRevC.92.044306
2015RU09 Phys.Rev. C 92, 034328 (2015) E.Ruchowska, H.Mach, M.Kowal, J.Skalski, W.A.Plociennik, B.Fogelberg Search for octupole correlations in 147Nd RADIOACTIVITY 147Pr(β-)[from 236U(n, F), E=thermal followed by mass separation of A=147 fragments]; measured Eγ, Iγ, γγ-coin, half-life of 147Pr ground state, level half-lives by βγγ(t) at OSIRIS-Studsvik facility. 147Nd; deduced levels, J, π, B(E2), B(M1), B(E1), B(M2), bands, electric dipole moment, single-quasiparticle configurations with nonzero octupole deformation. Calculated potential energy surfaces in (β2, β3) plane, and electric dipole moments.
doi: 10.1103/PhysRevC.92.034328
2014JA03 Phys.Rev. C 89, 024304 (2014) P.Jachimowicz, M.Kowal, J.Skalski Qa values in superheavy nuclei from the deformed Woods-Saxon model RADIOACTIVITY 246,247,248,249,250,251,252,253,254,255,256,257,258Md, 251,252,253,254,255,256,257No, 252,253,254,255,256,257,258,260Lr, 255,256,257,258,259,260,261,263Rf, 256,257,258,259,260,261,262,263Db, 259,260,261,262,263,264,265,266,267,268,269,271Sg, 260,261,262,263,264,265,266,267,268,269,270,271,272,273,274Bh, 263,264,265,266,267,268,269,270,271,272,273,274,275Hs, 266,267,268,269,270,271,272,273,274,275,276,278Mt, 267,268,269,270,271,272,273,279Ds, 272,273,274,275,276,277,278,279,280,281,282Rg, 277,278,279,280,281,282,283,284,285Cn, 278,279,280,281,282,283,284,285,286Nh, 286,287,288,289Fl, 287,288,289,290Mc, 290,291,292,293Lv, 293,294Ts, 294Og, 297119(α); calculated Qα, deformation parameters, ground-state configurations, α-decay hindrance. 270Db, 274Bh, 278Mt, 282Rg, 286Nh, 290Mc, 294Ts(α); calculated half-lives. Microscopic-macroscopic model based on deformed Woods-Saxon potential, with pairing treated either by blocking or by adding the BCS energy. Comparison with experimental data, and with other theoretical calculations.
doi: 10.1103/PhysRevC.89.024304
2013CA19 Phys.Rev. C 88, 037603 (2013) T.Cap, K.Siwek-Wilczynska, M.Kowal, J.Wilczynski Calculations of the cross sections for the synthesis of new 293-296118 isotopes in 249-252Cf(48Ca, xn) reactions NUCLEAR REACTIONS 249,250,251,252Cf(48Ca, 2n), (48Ca, 3n), (48Ca, 4n), (48Ca, 5n)292Og/293Og/294Og/295Og/296Og, 297Og/298Og, E(cm)=194-230 MeV; calculated evaporation residue σ(E), weighted σ(E) for 293,294,295,296Og based on isotopic abundance of Cf. Fusion-by-diffusion (FBD) model.
doi: 10.1103/PhysRevC.88.037603
2013JA03 Phys.Rev. C 87, 044308 (2013) P.Jachimowicz, M.Kowal, J.Skalski Eight-dimensional calculations of the third barrier in 232Th NUCLEAR STRUCTURE 232Th, 232U; calculated potential energy surfaces, ground state mass excess, first barrier height BI, second barrier height BII and energy of the second minimum EII, third fission barrier height BIII and energy of the third minimum EIII or hyperdeformation. Eight-dimensional hypercube and macroscopic-microscopic model calculations. Comparison with experimental data. Previous experimental report on Hyperdeformation in 232Th needs to be confirmed.
doi: 10.1103/PhysRevC.87.044308
2013SI16 Phys.Scr. T154, 014005 (2013) K.Siwek-Wilczynska, T.Cap, M.Kowal, J.Wilczynski Calculations of synthesis cross sections of Z = 104 113 superheavy nuclei in the fusion-by-diffusion model with the Warsaw macro micro-model fission barriers NUCLEAR REACTIONS 208Pb(50Ti, n)257Rf, 209Bi(54Cr, n)262Bh, 208Pb(59Co, n)266Mt, E(cm)<250 MeV; calculated σ. FBD model, fusion-by-diffusion model with the Warsaw macro-micro-model fission barriers, comparison with available data.
doi: 10.1088/0031-8949/2013/T154/014005
2012JA08 Phys.Rev. C 85, 034305 (2012) P.Jachimowicz, M.Kowal, J.Skalski Secondary fission barriers in even-even actinide nuclei NUCLEAR STRUCTURE 226,228,230,232,234,236Th, 230,232,234,236,238,240,242U, 234,236,238,240,242,244,246,248Pu, 240,242,244,246,248,250,252Cm, 248,250,252,254Cf; calculated mass excess, microscopic and macroscopic energies, deformation parameters, second fission barriers, surface contours, second minima excitation energies. macroscopic-microscopic model in six-dimensional deformation space for even-even actinides. Comparison with experimental data.
doi: 10.1103/PhysRevC.85.034305
2012KO21 Phys.Rev. C 85, 061302 (2012) Examination of the existence of third, hyperdeformed minima in actinide nuclei NUCLEAR STRUCTURE 230,232Th, 232,234U; calculated energy surface maps as function of deformation parameters β1 to β8, shape parameterization, quadrupole moments using the Woods-Saxon microscopic-macroscopic model; deduced third hyperdeformed minima, and third barriers in actinides.
doi: 10.1103/PhysRevC.85.061302
2012SI13 Phys.Rev. C 86, 014611 (2012) K.Siwek-Wilczynska, T.Cap, M.Kowal, A.Sobiczewski, J.Wilczynski Predictions of the fusion-by-diffusion model for the synthesis cross sections of Z=114-120 elements based on macroscopic-microscopic fission barriers NUCLEAR REACTIONS 243Am, 244Pu, 245,248Cm, 249Bk, 249Cf, 252,254Es(48Ca, xn)287Fl/288Fl/289Fl/287Mc/288Mc/289Mc/289Lv/290Lv/291Lv/292Lv/293Lv/294Lv/292Ts/293Ts/294Ts/295Ts/293Og/294Og/295Og/295119/296119/297119/298119/299119/300119, E(cm)=185-235 MeV; 249,251Cf, 249Bk(50Ti, xn)295119/296119/297119/294120/295120/296120/297120/298120/299120, E(cm)=205-255 MeV; 248Cm(54Cr, xn)298120/299120/300120, E=220-260 MeV; calculated synthesis σ using fusion-by-diffusion (FBD) model. Predictions of σ for the formation of Z=119, 120 superheavy elements.
doi: 10.1103/PhysRevC.86.014611
2011JA02 Int.J.Mod.Phys. E20, 514 (2011) P.Jachimowicz, P.Rozmej, M.Kowal, J.Skalski, A.Sobiczewski Test of tetrahedral symmetry for heavy and superheavy nuclei NUCLEAR STRUCTURE 226Th, 232No, 310124; calculated energy landscape, equilibrium values, tetrahedral and global minima.
doi: 10.1142/S0218301311017934
2011JA03 Phys.Rev. C 83, 054302 (2011) P.Jachimowicz, M.Kowal, J.Skalski Superdeformed oblate superheavy nuclei NUCLEAR STRUCTURE 276,278,280,282,284,286,288,290,292,294,296,298,300,302,304,306,308,310120; calculated energy versus quadrupole deformation, half-lives, Qα, single-particle energies, α decay hindrance for superdeformed oblate superheavy nuclei. 288122; calculated energy surface contour. Z=98-126, N=132-192; calculated ground state quadrupole deformation. Microscopic-macroscopic calculations in 12D deformation space, confirmed by Skyrme Hartree-Fock calculations with SLy6 force.
doi: 10.1103/PhysRevC.83.054302
2010JA01 Int.J.Mod.Phys. E19, 508 (2010) P.Jachimowicz, M.Kowal, J.Skalski Competing minima and non-axial saddles in superheavy nuclei NUCLEAR STRUCTURE Z=116-126, N=176-184; calculated energy landscapes of superheavy nuclei. Woods-Saxon model.
doi: 10.1142/S0218301310014911
2010JA02 Int.J.Mod.Phys. E19, 768 (2010) P.Jachimowicz, M.Kowal, P.Rozmej, J.Skalski, A.Sobiczewski Role of the non-axial octupole deformation in the potential energy of heavy nuclei NUCLEAR STRUCTURE 228,238Fm; calculated deformation energy; deduced effects of deformation on energy. Macroscopic-microscopic approach.
doi: 10.1142/S0218301310015205
2010KO23 Phys.Rev. C 82, 014303 (2010) M.Kowal, P.Jachimowicz, A.Sobiczewski Fission barriers for even-even superheavy nuclei NUCLEAR STRUCTURE A=232-318, Z=92-126 (even), N=134-192 (even); calculated fission barriers heights and their contour plots for even-even superheavy nuclei. 120320; calculated potential energy surface plot. Macroscopic-microscopic approach. Comparison with other theoretical calculations and with experimental data.
doi: 10.1103/PhysRevC.82.014303
2010KO36 Phys.Rev. C 82, 054303 (2010) Low-energy shape oscillations of negative parity in the main and shape-isomeric minima in actinides NUCLEAR STRUCTURE 240Pu; calculated fission barrier and cranking mass contour plots as function of various deformation parameters. 230,232,234,236Th, 230,232,234,236,238,240U, 234,236,238,240,242,244,246Pu, 234,236,238,240,242,244,246,250Cm, 238,240,242,244,246,248,250,252,254Cf; calculated stiffness coefficients at the first and second minima, energies of negative-parity shape oscillations in the first and second minima for K=0, 1 and 2, and transition electric dipole (E1) moments. Single-particle Hamiltonian with the deformed Woods-Saxon potential defined in terms of the nuclear surface and variety of shape deformations. Comparison with experimental data.
doi: 10.1103/PhysRevC.82.054303
2010SO07 Int.J.Mod.Phys. E19, 493 (2010) A.Sobiczewski, P.Jachimowicz, M.Kowal Effect of non-axial deformations of higher multipolarity on the fission-barrier height of heaviest nuclei NUCLEAR STRUCTURE 284,286,288,290,292,294,296,298,300,302,304,306,308,310,312122; calculated potential-energy surfaces, effects of oblate shape on ground state energy.
doi: 10.1142/S0218301310014893
2009JA06 Int.J.Mod.Phys. E18, 1088 (2009) P.Jachimowicz, M.Kowal, P.Rozmej, J.Skalski, A.Sobiczewski Non-axial octupole deformation of a heavy nucleus
doi: 10.1142/S0218301309013300
2009KO20 Int.J.Mod.Phys. E18, 914 (2009) Effect of non-axial deformations on the fission barrier of heavy and superheavy nuclei
doi: 10.1142/S021830130901304X
2009SO12 Int.J.Mod.Phys. E18, 869 (2009) Description of experimental fission barriers of heavy nuclei NUCLEAR STRUCTURE 232,234,236,238,240U, 232,234,236,238,240,242,244,246Pu, 242,246,248,250Cm, 250,252Cf, 260,262,264,266,268,270,272,274,276,278,280,282,284,286,288,290,292,294,296Ds; calculated fission barriers, compared to other calculations and experiment.
doi: 10.1142/S0218301309012975
2008KO06 Int.J.Mod.Phys. E17, 259 (2008) M.Kowal, L.Shvedov, A.Sobiczewski Saddle-point shell effects of heaviest nuclei NUCLEAR STRUCTURE Z=96-126; N=136-194; calculated shell corrections at the saddle points and ground states of the considered nuclei. Contour maps using macroscopic-microscopic approach.
doi: 10.1142/S021830130800977X
2008SH10 Int.J.Mod.Phys. E17, 265 (2008) L.Shvedov, S.G.Rohozinski, M.Kowal, S.Belchikov, A.Sobiczewski Deformations of multipolarity six at the saddle point of heaviest nuclei NUCLEAR STRUCTURE Z=98-122; N=138-190; calculated deformation parameters and potential energies. Contour maps using Macroscopic-microscopic approach.
doi: 10.1142/S0218301308009781
2008SO06 Int.J.Mod.Phys. E17, 168 (2008) A.Sobiczewski, M.Kowal, L.Shvedov Saddle-point shapes of heavy and superheavy nuclei NUCLEAR STRUCTURE Z=98-126; N=138-194; calculated deformation parameters and shapes of nuclei at their saddle-points and ground states using 10 dimensions macroscopic-microscopic approach.
doi: 10.1142/S0218301308009665
2007KO14 Int.J.Mod.Phys. E16, 425 (2007) Role of higher-multipolarity deformations in the potential energy of heaviest nuclei NUCLEAR STRUCTURE 284Fl; calculated potential energy vs deformation. Six-dimensional deformation space.
doi: 10.1142/S0218301307005855
2007SO05 Int.J.Mod.Phys. E16, 402 (2007) A.Sobiczewski, L.Shvedov, M.Kowal Test of approximation used in description of non-axial hexadecapole shapes of heaviest nuclei NUCLEAR STRUCTURE 262Sg, 284Fl; calculated total energy vs deformation. Five-dimensional deformation space.
doi: 10.1142/S0218301307005831
2007SO11 Acta Phys.Pol. B38, 1577 (2007) A.Sobiczewski, M.Kowal, L.Shvedov Search for Less Important Deformations in the Shapes of Heaviest Nuclei NUCLEAR STRUCTURE 262Sg; calculated potential energy in 5-dimensional deformation space.
2006SO15 Phys.Scr. T125, 68 (2006) Multi-dimensional fission barriers for heavy and superheavy nuclei NUCLEAR STRUCTURE 278Cn; calculated static fission barrier. 250Cf; calculated potential energy surfaces. Large deformation space, non-axial deformation effects considered.
doi: 10.1088/0031-8949/2006/T125/015
2005BA47 Int.J.Mod.Phys. E14, 365 (2005) A.Baran, M.Kowal, Z.Lojewski, K.Sieja Properties of superheavy nuclei in various macroscopic-microscopic models NUCLEAR STRUCTURE Z=108-122; calculated neutron and proton separation energies, radii, quadrupole moments. Z=112-118; calculated spontaneous fission and α-decay T1/2 for even-even isotopes. Macroscopic-microscopic models.
doi: 10.1142/S0218301305003132
2005BA95 Phys.Rev. C 72, 044310 (2005) A.Baran, Z.Lojewski, K.Sieja, M.Kowal Global properties of even-even superheavy nuclei in macroscopic-microscopic models NUCLEAR STRUCTURE Z=100-122; A=242-314; calculated quadrupole moments, radii, pair gap energies, Qα, fission and α-decay T1/2 for even-even nuclides. Macroscopic-microscopic approach, several models compared.
doi: 10.1103/PhysRevC.72.044310
2005KO14 Int.J.Mod.Phys. E14, 327 (2005) Influence of the entrance channel effects on the formation process of superheavy elements NUCLEAR REACTIONS 238U(48Ca, X), E ≈ 170-200 MeV; calculated fusion σ, barrier distribution, dependence on target deformation. 186W(16O, X), 154Sm(48Ca, X), E*=48, 53 MeV; calculated fusion spin distributions.
doi: 10.1142/S0218301305003077
2004KO14 Int.J.Mod.Phys. E13, 361 (2004) Importance of deformation and orientation of nuclear shapes for the synthesis of super-heavy elements NUCLEAR REACTIONS 238U, 244Pu, 248Cm, 252Cf(48Ca, X), E not given; calculated fusion barrier features vs deformation, orientation.
doi: 10.1142/S0218301304002193
2003DO22 Acta Phys.Pol. B34, 2457 (2003) A.Dobrowolski, M.Kowal, K.Pomorski Fusion barriers derived from the Hartree-Fock functional with Skyrme interactions NUCLEAR REACTIONS 238U(50Ti, X), 208Pb(76Ge, X), E not given; calculated fusion barrier features. Other reactions leading to Z=114 discussed.
2003KO75 Acta Phys.Pol. B34, 2411 (2003) The alpha-deformed superheavy nucleus interaction potential NUCLEAR STRUCTURE 278Fl; calculated α-parent interaction potential vs deformation, α-emission barrier features.
2000PO23 Nucl.Phys. A679, 25 (2000) K.Pomorski, B.Nerlo-Pomorska, A.Surowiec, M.Kowal, J.Bartel, K.Dietrich, J.Richert, C.Schmitt, B.Benoit, E.de Goes Brennand, L.Donadille, C.Badimon Light-Particle Emission from the Fissioning Nuclei 126Ba, 188Pt and 266, 272, 278110: Theoretical predictions and experimental results NUCLEAR REACTIONS 98Mo(28Si, X), E=166, 187, 204 MeV; 107Ag(19F, X), E=128, 148 MeV; 154Sm(34S, X), E=160, 203 MeV; 172Yb(16O, X), E=138 MeV; 208Pb(58Ni, X), (64Ni, X), 232Th(40Ca, X), 238U(40Ar, X), E=66-186 MeV; calculated fusion, fission σ(L), prefission particle multiplicities; deduced entrance channel effects. Comparisons with data.
doi: 10.1016/S0375-9474(00)00327-4
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