NSR Query Results
Output year order : Descending NSR database version of April 27, 2024. Search: Author = T.Sprouse Found 20 matches. 2024LI09 Phys.Lett. B 848, 138385 (2024) M.Li, T.M.Sprouse, B.S.Meyer, M.R.Mumpower Atomic masses with machine learning for the astrophysical r process NUCLEAR STRUCTURE N<160; analyzed available data; deduced mass deviations between Machine-Learning (ML) approach and HFB-32 model, neutron separation energies, abundances, β-decay rates. Comparison with AME 2020 data.
doi: 10.1016/j.physletb.2023.138385
2024VA02 Phys.Rev.Lett. 132, 052701 (2024) N.Vassh, X.Wang, M.Lariviere, T.Sprouse, M.R.Mumpower, R.Surman, Zh.Liu, G.C.McLaughlin, P.Denissenkov, F.Herwig Thallium-208: A Beacon of In Situ Neutron Capture Nucleosynthesis
doi: 10.1103/PhysRevLett.132.052701
2023HO02 Eur.Phys.J. A 59, 28 (2023) E.M.Holmbeck, T.M.Sprouse, M.R.Mumpower Nucleosynthesis and observation of the heaviest elements
doi: 10.1140/epja/s10050-023-00927-7
2023HO14 Phys.Rev.Lett. 131, 262701 (2023) D.E.M.Hoff, K.Kolos, G.W.Misch, D.Ray, B.Liu, A.A.Valverde, M.Brodeur, D.P.Burdette, N.Callahan, J.A.Clark, A.T.Gallant, F.G.Kondev, G.E.Morgan, M.R.Mumpower, R.Orford, W.S.Porter, F.Rivero, G.Savard, N.D.Scielzo, K.S.Sharma, K.Sieja, T.M.Sprouse, L.Varriano Direct Mass Measurements to Inform the Behavior of 128mSb in Nucleosynthetic Environments ATOMIC MASSES 128,128mSb; measured cyclotron frequencies; deduced mass excesses, isomer excitation energy. Comparison with AME2020, NUBASE2020, state-of-the-art shell model calculations using the GCN5082 interaction. The phase-imaging ion-cyclotron resonance (PI-ICR) technique with the Canadian Penning Trap (CPT) mass spectrometer at the Californium Rare Isotope Breeder Upgrade facility.
doi: 10.1103/PhysRevLett.131.262701
2022KI23 Astrophys.J. 936, 107 (2022) G.G.Kiss, A.Vitez-Sveiczer, Y.Saito, A.Tarifeno-Saldivia, M.Pallas, J.L.Tain, I.Dillmann, J.Agramunt, A.Algora, C.Domingo-Pardo, A.Estrade, C.Appleton, J.M.Allmond, P.Aguilera, H.Baba, N.T.Brewer, C.Bruno, R.Caballero-Folch, F.Calvino, P.J.Coleman-Smith, G.Cortes, T.Davinson, N.Fukuda, Z.Ge, S.Go, C.J.Griffin, R.K.Grzywacz, O.Hall, A.Horvath, J.Ha, L.J.Harkness-Brennan, T.Isobe, D.Kahl, T.T.King, A.Korgul, S.Kovacs, R.Krucken, S.Kubono, M.Labiche, J.Liu, J.Liang, M.Madurga, K.Miernik, F.Molina, A.I.Morales, M.R.Mumpower, E.Nacher, A.Navarro, N.Nepal, S.Nishimura, M.Piersa-Silkowska, V.Phong, B.C.Rasco, B.Rubio, K.P.Rykaczewski, J.Romero-Barrientos, H.Sakurai, L.Sexton, Y.Shimizu, M.Singh, T.Sprouse, T.Sumikama, R.Surman, H.Suzuki, T.N.Szegedi, H.Takeda, A.Tolosa, K.Wang, M.Wolinska-Cichocka, P.Woods, R.Yokoyama, Z.Xu Measuring the β-decay Properties of Neutron-rich Exotic Pm, Sm, Eu, and Gd Isotopes to Constrain the Nucleosynthesis Yields in the Rare-earth Region NUCLEAR REACTIONS 9Be(238U, X), E=345 MeV/nucleon; measured reaction products, TOF, Eβ, Iβ. 159,160,161,162,163,164,165,166Pm, 161,162,163,164,165,166,167,168Sm, 165,166,167,168,169,170Eu, 167,168,169,170,171,172Gd; deduced new isotopes T1/2 and β-delayed neutron emission probabilities, relative r-process abundance pattern for the neutron-star merger scenario. RIKEN Nishina Center, the Advanced Implantation Detector Array (AIDA) and the BRIKEN neutron detector array.
doi: 10.3847/1538-4357/ac80fc
2022LI20 Phys.Rev.Lett. 128, 152701 (2022) H.F.Li, S.Naimi, T.M.Sprouse, M.R.Mumpower, Y.Abe, Y.Yamaguchi, D.Nagae, F.Suzaki, M.Wakasugi, H.Arakawa, W.B.Dou, D.Hamakawa, S.Hosoi, Y.Inada, D.Kajiki, T.Kobayashi, M.Sakaue, Y.Yokoda, T.Yamaguchi, R.Kagesawa, D.Kamioka, T.Moriguchi, M.Mukai, A.Ozawa, S.Ota, N.Kitamura, S.Masuoka, S.Michimasa, H.Baba, N.Fukuda, Y.Shimizu, H.Suzuki, H.Takeda, D.S.Ahn, M.Wang, C.Y.Fu, Q.Wang, S.Suzuki, Z.Ge, Y.A.Litvinov, G.Lorusso, P.M.Walker, Z.Podolyak, T.Uesaka First Application of Mass Measurements with the Rare-RI Ring Reveals the Solar r-Process Abundance Trend at A=122 and A=123 ATOMIC MASSES 123Pd, 125Cd, 126In; measured frequencies; deduced mass excess values with low uncertainties. Comparison with calculations. Radioactive Isotope Beam Factory (RIBF) in RIKEN.
doi: 10.1103/PhysRevLett.128.152701
2022LO09 Phys.Rev. C 106, 014305 (2022) A.E.Lovell, A.T.Mohan, T.M.Sprouse, M.R.Mumpower Nuclear masses learned from a probabilistic neural network ATOMIC MASSES Z=20-110, N=16-160; calculated atomic masses and S(n) using the probabilistic Mixture Density Network (MDN) for six models: M2, MS2, MS6, MS8, MS10, and MS12, and compared with evaluated atomic masses in AME2016 and theoretical masses in Moller's FRDM2012. Relevance to accuracy of the match to the training data, and providing physically meaningful extrapolations beyond the limits of experimental data.
doi: 10.1103/PhysRevC.106.014305
2022MU14 Phys.Rev. C 106, L021301 (2022) M.R.Mumpower, T.M.Sprouse, A.E.Lovell, A.T.Mohan Physically interpretable machine learning for nuclear masses ATOMIC MASSES 137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,160,161,162Nd; calculated masses. Results obtained with probabilistic machine learning algorithm. Comparison to AME2016.
doi: 10.1103/PhysRevC.106.L021301
2022MU18 Phys.Rev. C 106, 065805 (2022) M.R.Mumpower, T.Kawano, T.M.Sprouse β-delayed fission in the coupled quasiparticle random-phase approximation plus Hauser-Feshbach approach RADIOACTIVITY 282Bk(β-F); calculated probabilities for neutron, γ, and fission channels, and total transmission coefficient sum. 290Am, 295Fm(β-n), (β-F); calculated probabilities for delayed neutron and delayed fission as a function of j-th neutrons emitted from the daughter nuclei. Z=94, A=254-324(β-n), (β-F); Z=97, A=257-327(β-n), (β-F); calculated cumulative probabilities for emitting neutrons or fission after β- decay, S(n) and maximum fission barriers. Z=85-120, N=160-230(β-n), (β-F); calculated average neutron multiplicities, average β--delayed neutron emission energies, cumulative probability of β--delayed fission (βdf). 244,246Pa, 248,250Np, 252,254Am, 256,258,259Bk, 261Cf, 262,263Es, 264,266,267Md, 269No, 268,269,270,271Lr, 271,273Rf, 272,273,274,275Db, 280,281,282,283Bh, 285Hs, 284,285,286,287Mt(β-F); calculated β-delayed fission (βdf) branching ratios greater than 1% among 72 model variations. Z=80, A=207-266; Z=81, A=210-268; Z=82, A=211-273; Z=83, A=212-276; Z=84, A=215, 217-279; Z=85, A=216-282; Z=86, A=221, 223-286; Z=87, A=222-289; Z=88, A=225, 227, 229-292; Z=89, A=224, 226, 228-295; Z=90, A=233-299; Z=91, A=230, 232, 234-302; Z=92, A=239-305; Z=93, A=236, 238, 240-308; Z=94, A=243, 245-312; Z=95, A=242, 244-315; Z=96, A=249, 251-318; Z=97, A=248, 250-321; Z=98, A=253, 255, 257-325; Z=99, A=252, 254-328; Z=100, A=261, 263-331; Z=101, A=260, 262-334; Z=102, A=265, 267-338; Z=103, A=264, 266-339; Z=104, A=269, 271, 273, 275-339; Z=105, A=270, 272-339; Z=106, A=279, 281-339; Z=107, A=274, 276, 278, 280-339; Z=108, A=285, 287-339; Z=109, A=282, 284-339; Z=110, A=291, 293-339; Z=111, A=288, 290-339; Z=112, A=295, 297-339; Z=113, A=294, 296-339; Z=114, A=301, 303, 305-339; Z=115, A=300, 302, 304-339; Z=116, A=309, 313, 315-339; Z=117, A=306, 308, 310-339; Z=118, A=323-339; Z=119, A=312, 316-339; Z=120, A=323, 325, 327-339; Z=121, A=320, 322, 324-339; Z=122, A=329, 331, 335-339; Z=123, A=326, 328-339; Z=124, A=337; Z=125, A=332, 334, 336-339; Z=127, A=338; calculated j-neutron emission probabilities (%β-xn or Pxn up to x=0-10), average neutron emission energies, average neutron multiplicities, and j-th neutron beta-delayed fission (βdf) probabilities after β- decay for 2436 neutron-rich nuclei, with numerical values listed in Supplemental Material. Los Alamos coupled quasiparticle random-phase approximation plus Hauser-Feshbach (QRPA+HF) approach.
doi: 10.1103/PhysRevC.106.065805
2022SC17 J.Phys.(London) G49, 110502 (2022) H.Schatz, A.D.Becerril Reyes, A.Best, E.F.Brown, K.Chatziioannou, K.A.Chipps, C.M.Deibel, R.Ezzeddine, D.K.Galloway, C.J.Hansen, F.Herwig, A.P.Ji, M.Lugaro, Z.Meisel, D.Norman, J.S.Read, L.F.Roberts, A.Spyrou, I.Tews, F.X.Timmes, C.Travaglio, N.Vassh, C.Abia, P.Adsley, S.Agarwal, M.Aliotta, W.Aoki, A.Arcones, A.Aryan, A.Bandyopadhyay, A.Banu, D.W.Bardayan, J.Barnes, A.Bauswein, T.C.Beers, J.Bishop, T.Boztepe, B.Cote, M.E.Caplan, A.E.Champagne, J.A.Clark, M.Couder, A.Couture, S.E.de Mink, S.Debnath, R.J.deBoer, J.den Hartogh, P.Denissenkov, V.Dexheimer, I.Dillmann, J.E.Escher, M.A.Famiano, R.Farmer, R.Fisher, C.Frohlich, A.Frebel, C.Fryer, G.Fuller, A.K.Ganguly, S.Ghosh, B.K.Gibson, T.Gorda, K.N.Gourgouliatos, V.Graber, M.Gupta, W.C.Haxton, A.Heger, W.R.Hix, W.C.G.Ho, E.M.Holmbeck, A.A.Hood, S.Huth, G.Imbriani, R.G.Izzard, R.Jain, H.Jayatissa, Z.Johnston, T.Kajino, A.Kankainen, G.G.Kiss, A.Kwiatkowski, M.La Cognata, A.M.Laird, L.Lamia, P.Landry, E.Laplace, K.D.Launey, D.Leahy, G.Leckenby, A.Lennarz, B.Longfellow, A.E.Lovell, W.G.Lynch, S.M.Lyons, K.Maeda, E.Masha, C.Matei, J.Merc, B.Messer, F.Montes, A.Mukherjee, M.R.Mumpower, D.Neto, B.Nevins, W.G.Newton, L.Q.Nguyen, K.Nishikawa, N.Nishimura, F.M.Nunes, E.O'Connor, B.W.O'Shea, W.-J.Ong, S.D.Pain, M.A.Pajkos, M.Pignatari, R.G.Pizzone, V.M.Placco, T.Plewa, B.Pritychenko, A.Psaltis, D.Puentes, Y.-Z.Qian, D.Radice, D.Rapagnani, B.M.Rebeiro, R.Reifarth, A.L.Richard, N.Rijal, I.U.Roederer, J.S.Rojo, J.S K, Y.Saito, A.Schwenk, M.L.Sergi, R.S.Sidhu, A.Simon, T.Sivarani, A.Skuladottir, M.S.Smith, A.Spiridon, T.M.Sprouse, S.Starrfield, A.W.Steiner, F.Strieder, I.Sultana, R.Surman, T.Szucs, A.Tawfik, F.Thielemann, L.Trache, R.Trappitsch, M.B.Tsang, A.Tumino, S.Upadhyayula, J.O.Valle Martinez, M.Van der Swaelmen, C.Viscasillas Vazquez, A.Watts, B.Wehmeyer, M.Wiescher, C.Wrede, J.Yoon, R.G.T.Zegers, M.A.Zermane, M.Zingale, the Horizon 2020 Collaborations Horizons: nuclear astrophysics in the 2020s and beyond
doi: https://dx.doi.org/10.1088/1361-6471/ac8890
2022SP02 Astrophys.J. 929, 22 (2022) T.M.Sprouse, G.W.Misch, M.R.Mumpower Isochronic Evolution and the Radioactive Decay of r-process Nuclei
doi: 10.3847/1538-4357/ac470f
2021HO13 Astrophys.J. 909, 21 (2021) E.M.Holmbeck, A.Frebel, G.C.McLaughlin, R.Surman, R.Fernandez, B.D.Metzger, M.R.Mumpower, T.M.Sprouse Reconstructing Masses of Merging Neutron Stars from Stellar r-process Abundance Signatures
doi: 10.3847/1538-4357/abd720
2021MI12 Astrophys.J. 913, L2 (2021) G.W.Misch, T.M.Sprouse, M.R.Mumpower Astromers in the Radioactive Decay of r-process Nuclei RADIOACTIVITY 69,71Zn, 79,81Se, 83,85Kr, 93,95,97Nb, 99Tc, 113,115,117Cd, 115,117,119In, 119,121,129Sn, 126,128,130Sb, 125,127,129,131,133Te, 131,133Xe, 137Ba, 144Pr, 166Ho, 189Os, 191,195Ir, 195Pt(IT); analyzed available data; deduced the dynamic population of nuclear isomers in the r process.
doi: 10.3847/2041-8213/abfb74
2021SP05 Phys.Rev. C 104, 015803 (2021) T.M.Sprouse, M.R.Mumpower, R.Surman Following nuclei through nucleosynthesis: A novel tracing technique NUCLEAR STRUCTURE A=80-240; calculated relative contributions to final isotopic abundances by terminating all the fission channels for different conditions of neutron star merger, relative contributions to final isotopic abundances for the β-delayed and neutron-induced fission products of neptunium and plutonium isotopes, comparison of fission yield to final traced abundances for the neutron-induced fission of 290Np and β-delayed fission of 270Bk. N=158-205; calculated integrated β-delayed and neutron-induced fission flows for individual nuclides during the cold tidal-tail ejecta conditions of neutron star merger. A=126-210; calculated isotopic abundances based on tracing β- decay of 152,176,186Nd. Z=40-80, N=50-134; calculated traced abundances of individual β-decays for Z=40-80 isotopes. Nucleosynthesis tracing framework for the r process, starting with system of coupled differential equations, and by quantifying relative fraction of nuclear abundances that pass through individual nuclear reaction, decay, and fission processes during nucleosynthesis.
doi: 10.1103/PhysRevC.104.015803
2021ZH02 Astrophys.J. 906, 94 (2021) Y.L.Zhu, K.A.Lund, J.Barnes, T.M.Sprouse, N.Vassh, G.C.McLaughlin, M.R.Mumpower, R.Surman Modeling Kilonova Light Curves: Dependence on Nuclear Inputs RADIOACTIVITY 254Cf, 254Cm, 258,259Fm, 267,269,270,271Rf, 273Db, 288Hs(SF); calculated total spontaneous fission heating, electron fractions using HFB22, HFB27, FRDM2012, UNEDF1 and ETFSI models.
doi: 10.3847/1538-4357/abc69e
2020SP04 Phys.Rev. C 101, 055803 (2020) T.M.Sprouse, R.Navarro-Perez, R.Surman, M.R.Mumpower, G.C.McLaughlin, N.Schunck Propagation of statistical uncertainties of Skyrme mass models to simulations of r-process nucleosynthesis ATOMIC MASSES Z=1-120; calculated atomic mass tables within the nuclear density functional theory (DFT) approach to nuclear structure with Skyrme energy density functionals (EDFs), and UNEDF1 parametrization. A=120-200; analyzed propagation of uncertainties in the Skyrme mass models using Bayesian statistics for the simulated r-process abundance patterns, by considering nuclear masses and the influence of the masses on β-decay and neutron capture rates.
doi: 10.1103/PhysRevC.101.055803
2020WU04 Phys.Rev. C 101, 042801 (2020) J.Wu, S.Nishimura, P.Moller, M.R.Mumpower, R.Lozeva, C.B.Moon, A.Odahara, H.Baba, F.Browne, R.Daido, P.Doornenbal, Y.F.Fang, M.Haroon, T.Isobe, H.S.Jung, G.Lorusso, B.Moon, Z.Patel, S.Rice, H.Sakurai, Y.Shimizu, L.Sinclair, P.-A.Soderstrom, T.Sumikama, H.Watanabe, Z.Y.Xu, A.Yagi, R.Yokoyama, D.S.Ahn, F.L.Bello Garrote, J.M.Daugas, F.Didierjean, N.Fukuda, N.Inabe, T.Ishigaki, D.Kameda, I.Kojouharov, T.Komatsubara, T.Kubo, N.Kurz, K.Y.Kwon, S.Morimoto, D.Murai, H.Nishibata, H.Schaffner, T.M.Sprouse, H.Suzuki, H.Takeda, M.Tanaka, K.Tshoo, Y.Wakabayashi β-decay half-lives of 55 neutron-rich isotopes beyond the N = 82 shell gap RADIOACTIVITY 134,135,136,137,138,139Sn, 134,135,136,137,138,139,140,141,142Sb, 137,138,139,140,141,142,143,144Te, 140,141,142,143,144,145,146I, 142,143,144,145,146,147,148Xe, 145,146,147,148,149,150,151Cs, 148,149,150,151,152,153Ba, 151,152,153,154,155La(β-)[from 9Be(238U, F), E=345 MeV/nucleon, followed by separation of fragments using BigRIPS separator at RIBF-RIKEN]; measured β and γ radiations, half-lives by (implant)β and (implant)βγ correlations using the Wide range Active Silicon-Strip Stop per Array for Beta and ion (WAS3ABi) detection system and Euroball RIKEN Cluster Array (EURICA) of 84 Ge cluster detectors. Comparison with previously available experimental half-lives, and with theoretical calculations using FRDM+QRPA, KTUY+GT2, RHB+pn-RQRPA, and DF+CQRPA models. 141Te(β-); calculated half-life and Gamow-Teller strengths using FRDM+QRPA(2019) model, and compared with experimental data. Discussed and calculated effects of new half-life data on r-process abundance.
doi: 10.1103/PhysRevC.101.042801
2018MU17 Astrophys.J. 869, 14 (2018) M.R.Mumpower, T.Kawano, T.M.Sprouse, N.Vassh, E.M.Holmbeck, R.Surman, P.Moller β-delayed Fission in r-process Nucleosynthesis
doi: 10.3847/1538-4357/aaeaca
2018ZH34 Astrophys.J. 863, L23 (2018) Y.Zhu, R.T.Wollaeger, N.Vassh, R.Surman, T.M.Sprouse, M.R.Mumpower, P.Moller, G.C.McLaughlin, O.Korobkin, T.Kawano, P.J.Jaffke, E.M.Holmbeck, C.L.Fryer, W.P.Even, A.J.Couture, J.Barnes Californium-254 and Kilonova Light Curves RADIOACTIVITY 254Cf(SF); calculated abundance, fission product yields, heating rates, mid-IR light curves.
doi: 10.3847/2041-8213/aad5de
2017MU13 Phys.Rev. C 96, 024612 (2017) M.R.Mumpower, T.Kawano, J.L.Ullmann, M.Krticka, T.M.Sprouse Estimation of M1 scissors mode strength for deformed nuclei in the medium- to heavy-mass region by statistical Hauser-Feshbach model calculations NUCLEAR REACTIONS 152,154,155,156,157,158Gd(n, γ), E=1 keV-4.5 MeV; calculated capture σ(E) with and without M1 scissors mode strength, capture γ-ray spectra, and compared with available experimental data. A=90-200; calculated capture cross sections at 200 keV with and without M1 scissors mode strength, and compared with evaluated cross sections in ENDF/B-VII.1 and JENDL-4 libraries; deduced additional M1 strength for nuclei in the fission product region nuclei required to reproduce evaluated capture cross section. A=50-250; calculated average photon width Γγ and compared with values in RIPL-3 database. Z=10-100, N=10-180; evaluated M1 enhancement of neutron capture reaction rates at a temperature of 1.0 GK. A=100-250; deduced isotopic abundances with the inclusion of M1 enhancement in the neutron capture rates relevant to r-process simulations. Impact of M1 scissors mode on neutron capture cross sections. Hauser-Feshbach calculation with a simple Lorentzian form for the M1 scissors mode.
doi: 10.1103/PhysRevC.96.024612
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