NSR Query Results
Output year order : Descending NSR database version of April 27, 2024. Search: Author = E.Ney Found 10 matches. 2023LU01 Astrophys.J. 944, 144 (2023) K.A.Lund, J.Engel, G.C.McLaughlin, M.R.Mumpower, E.M.Ney, R.Surman The Influence of β-decay Rates on r-process Observables
doi: 10.3847/1538-4357/acaf56
2022GI06 Phys.Rev. C 105, 055801 (2022) S.Giraud, R.G.T.Zegers, B.A.Brown, J.-M.Gabler, J.Lesniak, J.Rebenstock, E.M.Ney, J.Engel, A.Ravlic, N.Paar Finite-temperature electron-capture rates for neutron-rich nuclei near N=50 and effects on core-collapse supernova simulations RADIOACTIVITY 86Kr(EC); calculated Gamow-Teller strength distribution, EC-rates for various energies of initial states, average shell occupation. N=44-54(EC); Z=26-36(EC); calculated EC-rates. Finite-temperature proton-neutron relativistic QRPA (FT-PNRQRPA), finite-temperature QRPA (FT-QRPA) and shell-model calculations. Obtained finite-temperature electron-capture rates applied in one-dimensional core-collapse simulations.
doi: 10.1103/PhysRevC.105.055801
2022NE03 Phys.Rev. C 105, 034349 (2022) Two-body weak currents in heavy nuclei RADIOACTIVITY 134,136,138,140,142,144,146,148,150,152,154,156,158,160,162,164,166,168,170,172,174Sn(β-);162,164,166,168,170,172,174,176,178,180,182,184,186,188,190,192,194,196,198,200,202,204,206,208,210,212,214,216,218,220Gd(β-); calculated decay rates, Gamow-Teller strength distribution, density of the lowest lying Gamow-Teller transition amplitude. Two-body axial currents studied by charge-changing finite amplitude method with Skyrme functional.
doi: 10.1103/PhysRevC.105.034349
2021GO10 Phys.Rev. C 103, 035803 (2021) J.Gombas, P.A.DeYoung, A.Spyrou, A.C.Dombos, A.Algora, T.Baumann, B.Crider, J.Engel, T.Ginter, E.Kwan, S.N.Liddick, S.Lyons, F.Naqvi, E.M.Ney, J.Pereira, C.Prokop, W.Ong, S.Quinn, D.P.Scriven, A.Simon, C.Sumithrarachchi β-decay feeding intensity distributions for 103, 104mNb RADIOACTIVITY 103,104mNb(β-)[from 9Be(124Sn, X), E not given, followed by separation of fragments using A1900 separator at NSCL-MSU]; measured reaction products and particle identification plot from 9Be(124Sn, X), Eγ, Iγ, total absorption gamma spectra from the decays of 103Nb and 104mNb using Summing NaI(Tl) (SuN) detector at the NSCL-MSU; deduced Iβ feedings to levels in 103Mo and 104Mo, cumulative B(GT) values. Comparison to predictions of quasiparticle random-phase approximation (QRPA) model. Relevance to antineutrino studies of nuclear reactors, and astrophysical r process.
doi: 10.1103/PhysRevC.103.035803
2021PE08 Phys.Rev. C 103, 055808 (2021) C.F.Persch, P.A.DeYoung, S.Lyons, A.Spyrou, S.N.Liddick, F.Naqvi, B.P.Crider, A.C.Dombos, J.Gombas, D.L.Bleuel, B.A.Brown, A.Couture, L.Crespo Campo, J.Engel, M.Guttormsen, A.C.Larsen, R.Lewis, S.Karampagia, S.Mosby, E.M.Ney, A.Palmisano, G.Perdikakis, C.J.Prokop, T.Renstrom, S.Siem, M.K.Smith, S.J.Quinn β-decay feeding intensity distributions of 71, 73Ni RADIOACTIVITY 71,73Ni(β-)[from 9Be(86Kr, X), E=140 MeV/nucleon, followed by separation of fragments using A1900 fragment separator at NSCL-MSU facility]; measured implantation events and β particles using position-sensitive, double-sided, silicon-strip detector (DSSD), and two silicon PIN detectors for TOF and energy loss, Eγ, Iγ, half-lives of decays of 71,73Ni using a total absorption summing NaI(Tl) detector (SuN) surrounding the DSSD; deduced multiplicity spectra, Iβ(E) feedings, B(GT). GEANT4 and DICEBOX analysis of total absorption spectrum (TAS). Comparison with QRPA, and shell-model calculations, the latter using NuShellX@MSU code with JJ44B and JUN45 interaction Hamiltonians. Relevance to improvement in the nuclear input for r-process calculations. NUCLEAR REACTIONS 9Be(86Kr, X)71Ni/73Ni/71Cu/73Cu/, E=140 MeV/nucleon; measured yields of reaction products using A1900 fragment separator and two silicon PIN detectors for TOF and energy loss at NSCL-MSU facility.
doi: 10.1103/PhysRevC.103.055808
2020GA02 Phys.Rev. C 101, 014308 (2020) B.Gao, R.G.T.Zegers, J.C.Zamora, D.Bazin, B.A.Brown, P.Bender, H.L.Crawford, J.Engel, A.Falduto, A.Gade, P.Gastis, T.Ginter, C.J.Guess, S.Lipschutz, A.O.Macchiavelli, K.Miki, E.M.Ney, B.Longfellow, S.Noji, J.Pereira, J.Schmitt, C.Sullivan, R.Titus, D.Weisshaar Gamow-Teller transitions to 93Zr via the 93Nb (t, 3He + γ) reaction at 115 MeV/u and its application to the stellar electron-capture rates NUCLEAR REACTIONS 93Nb(t, 3He), E=115 MeV/nucleon; measured 3He particle spectra, Eγ, double-differential σ(θ) using S800 spectrograph and GRETINA array at NSCL-MSU Coupled Cyclotron Facility. 93Zr; deduced levels, L-transfer, J, π, B(GT), electron capture (EC) rates in the late evolution of core-collapse supernovae, DWBA and multipole decomposition analysis (MDA). Comparison with QRPA and shell-model calculations.
doi: 10.1103/PhysRevC.101.014308
2020NE08 Phys.Rev. C 102, 034326 (2020) E.M.Ney, J.Engel, T.Li, N.Schunck Global description of β- decay with the axially deformed Skyrme finite-amplitude method: Extension to odd-mass and odd-odd nuclei RADIOACTIVITY Z=20, A=50-61(β-); Z=21, A=50-66(β-); Z=22, A=52-73(β-); Z=23, A=53-74(β-); Z=24, A=56-79(β-); Z=25, A=57-80(β-); Z=26, A=60-83(β-); Z=27, A=62-88(β-); Z=28, A=68-93(β-); Z=29, A=68-96(β-); Z=30, A=74-99(β-); Z=31, A=74-102(β-); Z=32, A=80-103(β-); Z=33, A=80-110(β-); Z=34, A=84-113(β-); Z=35, A=84-116(β-); Z=36, A=88-117(β-); Z=37, A=88-120(β-); Z=38, A=90-121(β-); Z=39, A=90-124(β-); Z=40, A=97-125(β-); Z=41, A=96-128(β-); Z=42, A=102-135(β-); Z=43, A=102-138(β-); Z=44, A=106-143(β-); Z=45, A=106-146(β-); Z=46, A=112-147(β-); Z=47, A=112-150(β-); Z=48, A=118-157(β-); Z=49, A=124-160(β-); Z=50, A=128-163(β-); Z=51, A=128-168(β-); Z=52, A=134-171(β-); Z=53, A=134-176(β-); Z=54, A=138-179(β-); Z=55, A=138-182(β-); Z=56, A=140-183(β-); Z=57, A=141-184(β-); Z=58, A=144-185(β-); Z=59, A=146-186(β-); Z=60, A=152-187(β-); Z=61, A=152-188(β-); Z=62, A=156-189(β-); Z=63, A=156-192(β-); Z=64, A=162-207(β-); Z=65, A=162-210(β-); Z=66, A=166-213(β-); Z=67, A=167-218(β-); Z=68, A=172-221(β-); Z=69, A=172-224(β-); Z=70, A=180-227(β-); Z=71, A=180-228(β-); Z=72, A=184-233(β-); Z=73, A=185-238(β-); Z=74, A=190-241(β-); Z=75, A=191-248(β-); Z=76, A=194-255(β-); Z=77, A=195-256(β-); Z=78, A=202-261(β-); Z=79, A=202-262(β-); Z=80, A=206-265(β-); Z=81, A=210-266(β-); Z=82, A=212-267(β-); Z=83, A=214-268(β-); Z=84, A=220-269(β-); Z=85, A=220-270(β-); Z=86, A=224-271(β-); Z=87, A=225-272(β-); Z=88, A=230-273(β-); Z=89, A=231-274(β-); Z=90, A=236-275(β-); Z=91, A=237-278(β-); Z=92, A=242-281(β-); Z=93, A=242-302(β-); Z=94, A=246-305(β-); Z=95, A=247-308(β-); Z=96, A=252-309(β-); Z=97, A=254-314(β-); Z=98, A=260-315(β-); Z=99, A=260-318(β-); Z=100, A=268-323(β-); Z=101, A=268-326(β-); Z=102, A=274-329(β-); Z=103, A=274-332(β-); Z=104, A=282-335(β-); Z=105, A=282-336(β-); Z=106, A=286-339(β-); Z=107, A=290-340(β-); Z=108, A=292-345(β-); Z=109, A=294-348(β-); Z=110, A=300-369(β-); calculated asymptotic quantum numbers of the blocked proton or neutron quasiparticle, HFB binding energy, β2 deformation parameter, β- decay half-lives of 3983 neutron-rich nuclei, Q(β-), percent first-forbidden rate, QRPA energy and B(GT) Gamow-Teller strength for selected nuclei. Statistical extension of the charge-changing Finite-amplitude method (FAM), with a global Skyrme density functional. Comparison with experimental data, and with other theoretical calculations. Relevance to r process in nucleosynthesis.
doi: 10.1103/PhysRevC.102.034326
2019LY02 Phys.Rev. C 100, 025806 (2019) S.Lyons, A.Spyrou, S.N.Liddick, F.Naqvi, B.P.Crider, A.C.Dombos, D.L.Bleuel, B.A.Brown, A.Couture, L.Crespo Campo, J.Engel, M.Guttormsen, A.C.Larsen, R.Lewis, P.Moller, S.Mosby, M.R.Mumpower, E.M.Ney, A.Palmisano, G.Perdikakis, C.J.Prokop, T.Renstrom, S.Siem, M.K.Smith, S.J.Quinn 69, 71Co β-decay strength distributions from total absorption spectroscopy RADIOACTIVITY 69,71Co(β-)[from 9Be(86Kr, X), E=140 MeV/nucleon, followed by in flight separation of fragments by the A1900 fragment separator at NSCL-MSU]; measured Eγ, Iγ, Eβ, βγ-coin, half-lives of decays of 69,71Co decays, total absorption spectra using Summing NaI(Tl) (SuN) detector for γ rays and double-sided silicon strip detector (DSSD) for β; deduced cumulative Iβ distributions and compared to QRPA and Skyrme QRPA calculations, Gamow-Teller (GT) strength distribution. Comparison of decay half-lives with ENSDF values, and theoretical calculations using shell mode, QRPA and Skyrme QRPA. Relevance to r process in nucleosynthesis.
doi: 10.1103/PhysRevC.100.025806
2019TI09 Phys.Rev. C 100, 045805 (2019) R.Titus, E.M.Ney, R.G.T.Zegers, D.Bazin, J.Belarge, P.C.Bender, B.A.Brown, C.M.Campbell, B.Elman, J.Engel, A.Gade, B.Gao, E.Kwan, S.Lipschutz, B.Longfellow, E.Lunderberg, T.Mijatovic, S.Noji, J.Pereira, J.Schmitt, C.Sullivan, D.Weisshaar, J.C.Zamora Constraints for stellar electron-capture rates on 86Kr via the 86Kr(t, 3He+γ)86Br reaction and the implications for core-collapse supernovae NUCLEAR REACTIONS 86Kr, 12C, 14N(t, 3He), E=115 MeV/nucleon, [tritons from 9Be(16O, X), E=150 MeV/nucleon primary reaction, and separated using A1900 fragment separator]; measured 3He spectra, Eγ, Iγ, γγ- and (3He)γ-coin, differential σ(θ) using S800 spectrograph for particles and GRETINA array for γ detection at the NSCL-MSU facility. Data from 12C 14N present as contaminants used for energy calibration. 86Br; deduced levels, L-transfers, Gamow-Teller strength distributions. 86Kr; calculated electron capture rates at T=10 GK using the deduced Gamow-Teller strength distributions. Comparison with shell-model and quasiparticle random-phase approximation (QRPA) calculations. Z=26-41, N=75-93; calculated electron capture rates for 78 nuclides near N=50 and Z=28 (see 2018Ti02) using quasiparticle random-phase approximation (QRPA), with Jπ assignments made for ground states of some nuclides using Gallagher-Moszkowski (GM) rule. Relevance to astrophysical simulations of core-collapse supernovae.
doi: 10.1103/PhysRevC.100.045805
2019ZA07 Phys.Rev. C 100, 032801(R) (2019) J.C.Zamora, R.G.T.Zegers, SamM.Austin, D.Bazin, B.A.Brown, P.C.Bender, H.L.Crawford, J.Engel, A.Falduto, A.Gade, P.Gastis, B.Gao, T.Ginter, C.J.Guess, S.Lipschutz, B.Longfellow, A.O.Macchiavelli, K.Miki, E.Ney, S.Noji, J.Pereira, J.Schmitt, C.Sullivan, R.Titus, D.Weisshaar Experimental constraint on stellar electron-capture rates from the 88Sr(t, 3He + γ) 88Rb reaction at 115 MeV/u NUCLEAR REACTIONS 88Sr(t, 3He)88Rb, E=115 MeV/nucleon, [secondary triton beam from 9Be(16O, X), E=150 MeV/nucleon using Coupled Cyclotron Facility and A1900 fragment separator at NSCL-MSU]; measured 3He ejectiles, angular distributions using S800 spectrograph, and Eγ, Iγ using GRETINA array; deduced double-differential cross sections, L-transfers from fitting of the σ(θ) distributions in the multipole decomposition analysis (MDA), two-dimensional histogram of γ-ray energy versus excitation energy of 88Rb. 88Sr; deduced B(GT) strength distributions, electron capture (EC) rates on 88Sr as a function of stellar density at a temperature of 10 GK. 86,87,88Rb; deduced transitions. 12C(t, 3He)12B, E=115 MeV/nucleon; measured 3He ejectiles, reaction used for calibration and for absolute measurement of the triton beam intensity. Comparison of experimental EC rates on 88Sr with shell model and QRPA calculations. Relevance to the late evolution of core-collapse supernovae.
doi: 10.1103/PhysRevC.100.032801
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