NSR Query Results
Output year order : Descending NSR database version of April 26, 2024. Search: Author = P.Siwach Found 11 matches. 2023AU03 Phys.Rev. C 108, L011303 (2023) K.Auranen, P.Siwach, P.Arumugam, A.D.Briscoe, L.S.Ferreira, T.Grahn, P.T.Greenlees, A.Herzan, A.Illana, D.T.Joss, H.Joukainen, R.Julin, H.Jutila, M.Leino, J.Louko, M.Luoma, E.Maglione, J.Ojala, R.D.Page, J.Pakarinen, P.Rahkila, J.Romero, P.Ruotsalainen, M.Sandzelius, J.Saren, A.Tolosa-Delgado, J.Uusitalo, G.Zimba Probing triaxiality beyond the proton drip line: Spectroscopy of 147Tm NUCLEAR REACTIONS 92Mo(58Ni, 2np)147Tm, E=250 MeV; measured Eγ, Iγ, fusion-evaporation residues, recoils, γγ-coin, (recoils)γ-coin, γ(θ). 147Tm; deduced levels, J, π, angular distribution coefficients, high-spin states, spin-parity of the isomeric proton decaying state, triaxiality evidences for ground-state ans isomeric state, configurations. Comparison to nonadiabatic quasiparticle model calculation. Recoil-decay tagging study using the vacuum-mode recoil separator MARA coupled with the JUROGAM3 g-ray spectrometer at Accelerator Laboratory of University of Jyvaskyla. RADIOACTIVITY 147mTm(p) [from 92Mo(58Ni, 2np), E=250 MeV]; measured Eγ, Iγ, recoils, γγ-coin, (recoils)γ-coin; deduced T1/2 of the 5/2+ isomeric state proton decay. Recoil-decay tagging study using the vacuum-mode recoil separator MARA coupled with the JUROGAM3 g-ray spectrometer at Accelerator Laboratory of University of Jyvaskyla.
doi: 10.1103/PhysRevC.108.L011303
2023BA28 Eur.Phys.J. A 59, 186 (2023) A.B.Balantekin, M.J.Cervia, A.V.Patwardhan, E.Rrapaj, P.Siwach Quantum information and quantum simulation of neutrino physics
doi: 10.1140/epja/s10050-023-01092-7
2023LA02 Eur.Phys.J. A 59, 3 (2023) D.Lacroix, E.A.Ruiz Guzman, P.Siwach Symmetry breaking/symmetry preserving circuits and symmetry restoration on quantum computers - A quantum many-body perspective
doi: 10.1140/epja/s10050-022-00911-7
2022SI09 Phys.Rev. C 105, L031302 (2022) P.Siwach, P.Arumugam, S.Modi, L.S.Ferreira, E.Maglione Fine structure in the odd-odd proton emitter 144Tm RADIOACTIVITY 144Tm(p); calculated T1/2, branching ratios. 144Tm; calculated J, π of the ground state, configuration. 143Er; J, π, levels. Nonadiabatic quasiparticle approach. Proposed triaxial deformation for the ground state of 144Tm. Comparison to available experimental data.
doi: 10.1103/PhysRevC.105.L031302
2022SI13 Phys.Rev. C 105, 064318 (2022) Quantum computation of nuclear observables involving linear combinations of unitary operators NUCLEAR STRUCTURE 2H; calculated binding energy, quadrupole moment. Quantum computation of linear combinations of unitaries (LCU) using the Hadamard test as used in the variational quantum eigensolver (VQE) algorithm.
doi: 10.1103/PhysRevC.105.064318
2022SI26 Phys.Rev. C 106, 044322 (2022) P.Siwach, P.Arumugam, S.Modi, L.S.Ferreira, E.Maglione Effects of triaxiality and residual $np$ interaction in the proton emission from 140Ho RADIOACTIVITY 140Ho(p); calculated T1/2, branching ratios to excited states in 139Dy. 139Dy, 140Ho; calculated levels, J, π, neutron single-particle energy levels, rotational energies, contributions of various single-particle configurations to rotational states. Calculations within nonadiabatic quasiparticle approach considering the role of residual neutron-proton interaction and triaxiality. Comparison to experimental data.
doi: 10.1103/PhysRevC.106.044322
2021SI06 Phys.Rev. C 103, 024327 (2021) P.Siwach, P.Arumugam, L.S.Ferreira, E.Maglione Behavior of chiral bands in 128, 130Cs and 130La NUCLEAR STRUCTURE 128,130Cs, 130La; calculated rotational energies, odd-even staggering, B(M1), B(M1)/B(E2), B(E2), contributions of single-particle configurations as a function of spin for positive-parity chiral doublet bands, root mean square (rms) values of the core, proton, and neutron angular momentum components. Nonadiabatic quasiparticle approach. Comparison with experimental data.
doi: 10.1103/PhysRevC.103.024327
2021SI10 Phys.Rev. C 103, L031303 (2021) P.Siwach, P.Arumugam, S.Modi, L.S.Ferreira, E.Maglione Interpretation of 108I as an odd-odd γ-deformed proton emitter NUCLEAR STRUCTURE 107Te, 107I; calculated Single-particle and quasiparticle levels for neutrons in 107Te and for protons in 107I, rotational energies, J, π of 107Te. 108I; calculated rotational energies, J, π, configurations, proton emission half-life as function of γ and β2 deformation parameters, contribution of single-particle configurations with and without np interaction. 108I; deduced g.s. Jπ from GM splitting and Newby shift. Comparison with experimental proton emission half-life of 108I. Nonadiabatic quasiparticle microscopic approach to interpret the data for triaxial odd-odd proton emitters.
doi: 10.1103/PhysRevC.103.L031303
2021SI25 Phys.Rev. C 104, 034301 (2021) Quantum simulation of nuclear Hamiltonian with a generalized transformation for Gray code encoding NUCLEAR STRUCTURE 2H; calculated binding energy in a hybrid quantum-classical approach by considering three cases (Jordan-Wigner, Bravyi-Kitaev, Gray code) of encodings and corresponding transformations, with the potential derived from pionless effective field theory, and the central potential for which the operator is not tridiagonal, and by proposing an ansatze in the form of quantum circuits with parameters evaluated utilizing the variational quantum eigensolver (VQE). Comparison with experimental value.
doi: 10.1103/PhysRevC.104.034301
2020SI25 J.Phys.(London) G46, 125105 (2020) P.Siwach, P.Arumugam, S.Modi, L.S.Ferreira, E.Maglione Nonadiabatic quasiparticle description of rotation-particle coupling in triaxial odd-odd nuclei NUCLEAR STRUCTURE 138Pm, 180Ta; calculated single-particle and quasiparticle energies, bands, staggering, J, π.
doi: 10.1088/1361-6471/abb6c2
2020SI29 Phys.Lett. B 811, 135937 (2020) P.Siwach, P.Arumugam, L.S.Ferreira, E.Maglione Chirality in 136, 138Pm NUCLEAR STRUCTURE 136,138Pm; analyzed available data; calculated rotational energies, band staggering, B(E2), B(M1), chiral geometry, probability of single-particle configurations; deduced the assignment of J and π to theband-head of yrast band.
doi: 10.1016/j.physletb.2020.135937
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