NSR Query Results
Output year order : Descending NSR database version of April 27, 2024. Search: Author = P.Jachimowicz Found 26 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
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
2019TU09 Phys.Rev. C 100, 014330 (2019) A.Tucholski, Ch.Droste, J.Srebrny, C.M.Petrache, J.Skalski, P.Jachimowicz, M.Fila, T.Abraham, M.Kisielinski, A.Kordyasz, M.Kowalczyk, J.Kownacki, T.Marchlewski, P.J.Napiorkowski, L.Prochniak, J.Samorajczyk-Pysk, A.Stolarz, A.Astier, B.F.Lv, E.Dupont, S.Lalkovski, P.Walker, E.Grodner, Z.Patyk Lifetime of the recently identified 10+ isomeric state at 3279 keV in the 136Nd nucleus NUCLEAR REACTIONS 120Sn(20Ne, 4n), E=85 MeV; measured Eγ, Iγ, γγ-coin, level half-lives using recoil-distance Doppler shift (RDDS) method with a plunger device using the EAGLE array of 16 HPGe detector at the U-200P cyclotron facility of the Heavy Ion Laboratory in Warsaw. 136Nd; deduced levels, B(E1), B(E2), reduced hindrance factor for the 10+ state at 3279 keV; calculated energy surface contour in (β20, β22) plane, neutron and proton single-particle energies using microscopic-macroscopic approach, based on deformed Woods-Saxon single-particle potential and the Yukawa-plus-exponential macroscopic energy.
doi: 10.1103/PhysRevC.100.014330
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
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
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
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
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
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
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
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