NSR Query Results
Output year order : Descending NSR database version of April 11, 2024. Search: Author = J.Vadas Found 7 matches. 2022JO04 Phys.Rev. C 106, L011603 (2022) J.E.Johnstone, V.Singh, R.Giri, S.Hudan, J.Vadas, R.T.deSouza, D.Ackermann, A.Chbihi, Q.Hourdille, A.Abbott, C.Balhoff, A.Hannaman, A.B.McIntosh, M.Sorensen, Z.Tobin, A.Wakhle, S.J.Yennello, M.A.Famiano, K.W.Brown, C.Santamaria, J.Lubian, H.O.Soler, B.V.Carlson Proton and neutron exchange as a prelude to fusion at near-barrier energies NUCLEAR REACTIONS ^{39,41,45,47}K(^{28}Si, X), ^{36,44}Ar(^{28}Si, X), E(cm)=34-46 MeV; measured reaction products, evaporation residues; deduced fusion excitation functions, fusion σ(E), potential energy surfaces for binary fragments. Comparison to Dirac-Hartree-Bogoliubov (DHB) calculations for the ground state densities used in Sao Paulo fusion model. Radioactive beams of K and Ar ions were produced by the coupled cyclotron facility at MSU-NSCL and thermalized in a linear gas stopper before being reaccelerated by the ReA3 linac.
doi: 10.1103/PhysRevC.106.L011603
2021SI18 Phys.Rev. C 103, 064606 (2021) V.Singh, J.Vadas, T.K.Steinbach, B.B.Wiggins, S.Hudan, R.T.deSouza Assessing the impact of valence sd neutrons and protons on fusion NUCLEAR REACTIONS ^{12}C(^{16}O, X), E(cm)=16.0, 14.3, 13.1, 12.0, 11.0, 10.1, 8.9, 8.3 MeV; ^{12}C(^{17}F, X), E(cm)=18.82, 17.03, 15.71, 14.53, 13.53, 12.55, 11.26, 10.65 MeV, [^{17}F beam from ^{2}H(^{16}O, n), E≈4.5 MeV/nucleon from John D. Fox accelerator laboratory of Florida State University, followed by separation of fragments using RESOLUT magnetic spectrometer]; measured reaction products, identification and ΔE-TOF spectra of evaporation residues using two microchannel plate detectors together with compact ionization chamber (CID), fusion σ(E). ^{12}C(^{16}O, X), (^{18}O, X), E(cm)=8-27 MeV; ^{12}C(^{17}F, X), (^{19}F, X), (^{20}Ne, X), E(cm)=10-30 MeV; ^{12}C(^{19}F, X), E(cm)=11-22 MeV; ^{12}C(^{17}O, X), E(cm)-V_{B}=0-15.5 MeV; analyzed fusion σ(E) data from present and previous experiments, and compared with predictions of analytic fusion model, one-dimensional barrier-penetration model, time-dependent Hartree Fock (TDHF) model and Coupled-channels calculations using CCFULL code. Relevance to future high-quality measurements of fusion for neutron-rich light nuclei with new generation of radioactive ion-beam facilities.
doi: 10.1103/PhysRevC.103.064606
2021SI29 Phys.Rev. C 104, L041601 (2021) V.Singh, J.E.Johnstone, R.Giri, S.Hudan, J.Vadas, R.T.deSouza, D.Ackermann, A.Chbihi, Q.Hourdille, A.Abbott, C.Balhoff, A.Hannaman, A.B.McIntosh, M.Sorensen, Z.Tobin, A.Wakhle, S.J.Yennello, M.A.Famiano, K.W.Brown, C.Santamaria, J.Lubian, H.O.Soler, B.V.Carlson Impact of shell structure on the fusion of neutron-rich mid-mass nuclei NUCLEAR REACTIONS ^{16}O(^{39}K, X), (^{41}K, X), (^{45}K, X), (^{47}K, X), (^{36}Ar, X), (^{44}Ar, X), E(cm)=23-33 MeV, [secondary radioactive ^{45,47}K, ^{44}Ar beams from ^{9}Be(^{48}Ca, X), E=140 MeV/nucleon, followed by separation of ions using A1900 at NSCL-MSU facility]; measured reaction products, fusion σ(E); deduced reduced fusion excitation functions; investigated influence of shell effects on fusion of mid-mass nuclei. Comparison of experimental fusion cross sections with Sao Paulo model using Dirac-Hartree-Bogoliubov (DHB) densities, and densities from systematics; deduced over prediction of fusion experimental σ for closed-shell nuclei using DHB densities. ^{39,41,45,47}K, ^{36,44}Ar; predicted DHB density distributions of protons and neutrons. Relevance to importance of understanding shell effects at the saddle point for accurate description of fusion process.
doi: 10.1103/PhysRevC.104.L041601
2018VA03 Phys.Rev. C 97, 031601 (2018) J.Vadas, V.Singh, B.B.Wiggins, J.Huston, S.Hudan, R.T.deSouza, Z.Lin, C.J.Horowitz, A.Chbihi, D.Ackermann, M.Famiano, K.W.Brown Probing the fusion of neutron-rich nuclei with re-accelerated radioactive beams NUCLEAR REACTIONS ^{28}Si(^{39}K, X), (^{47}K, X), E=2-3 MeV/nucleon, [ions of ^{39}K from a source, and ^{47}K from a thermalized radioactive beam charge bred in an ion trap, injected into the ReA3 linac at NSCL-MSU facility]; measured reaction products, particles by ΔE-TOF, fusion σ(E); deduced impact of additional neutrons on fusion. Comparison with Wong parametrization, and with different models including coupled-channel calculations using CCFULL code.
doi: 10.1103/PhysRevC.97.031601
2017SI03 Phys.Lett. B 765, 99 (2017) V.Singh, J.Vadas, T.K.Steinbach, B.B.Wiggins, S.Hudan, R.T.deSouza, Z.Lin, C.J.Horowitz, L.T.Baby, S.A.Kuvin, V.Tripathi, I.Wiedenhover, A.S.Umar Fusion enhancement at near and sub-barrier energies in ^{19}O + ^{12}C NUCLEAR REACTIONS ^{12}C(^{18}O, X), (^{19}O, X), E(cm)<20 MeV; measured reaction products; deduced σ. comparison with a state-of-the-art microscopic model.
doi: 10.1016/j.physletb.2016.12.017
2015VA21 Phys.Rev. C 92, 064610 (2015) J.Vadas, T.K.Steinbach, J.Schmidt, V.Singh, C.Haycraft, S.Hudan, R.T.deSouza, L.T.Baby, S.A.Kuvin, I.Wiedenhover Evidence for survival of the α cluster structure in light nuclei through the fusion process NUCLEAR REACTIONS ^{12}C(^{18}O, X), E=16.25, 17.5, 18.8, 20, 22.5, 25, 27.5, 32, 36 MeV; measured energy versus time-of-flight spectrum of evaporation residues (ER), σ(θ, E) and yields of ERs, Eα, Iα, α(θ), average energy of α particles at Florida State Tandem accelerator facility. Comparison with statistical model calculations using EVPAOR and PACE4 codes, and with experimental data for ^{12,13}C(^{16}O, X), E(cm)=6-15 MeV.
doi: 10.1103/PhysRevC.92.064610
2014ST22 Phys.Rev. C 90, 041603 (2014) T.K.Steinbach, J.Vadas, J.Schmidt, C.Haycraft, S.Hudan, R.T.deSouza, L.T.Baby, S.A.Kuvin, I.Wiedenhover, A.S.Umar, V.E.Oberacker Sub-barrier enhancement of fusion as compared to a microscopic method in ^{18}O + ^{12}C NUCLEAR REACTIONS ^{12}C(^{18}O, X), E=16.25, 36 MeV; measured fragment spectra, fusion σ(E) in sub-barrier domain, time-of-flight (TOF) technique at FSU tandem accelerator facility. Pulsed beam. Comparison with previous experimental results, and with density-constrained time-dependent Hartree-Fock (DC-TDHF) and coupled channel calculations.
doi: 10.1103/PhysRevC.90.041603
Back to query form |