NSR Query Results
Output year order : Descending NSR database version of April 11, 2024. Search: Author = R.Surman Found 45 matches. 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
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
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
2022OR02 Phys.Rev. C 105, L052802 (2022) R.Orford, N.Vassh, J.A.Clark, G.C.McLaughlin, M.R.Mumpower, D.Ray, G.Savard, R.Surman, F.Buchinger, D.P.Burdette, M.T.Burkey, D.A.Gorelov, J.W.Klimes, W.S.Porter, K.S.Sharma, A.A.Valverde, L.Varriano, X.L.Yan Searching for the origin of the rare-earth peak with precision mass measurements across Ce-Eu isotopic chains ATOMIC MASSES 152,153,154Ce, 152,153,154,156,157Pr, 157Nd, 161Pm, 163,165Eu; measured cyclotron frequency; deduced mass excess, solar abundances of rare-earth elements. Comparison to AME2016 and AME2020 evaluations, previous experimental data and calculations using Markov chain Monte Carlo (MCMC) technique. Canadian Penning Trap (CPT) with low-energy ion beams from the Californium Rare Isotope Breeder Upgrade(CARIBU) facility at Argonne National Laboratory. Systematics of CPT mass-measurements for Ce, Pr, Nd, Pm, Sm, Eu (Z=58-63).
doi: 10.1103/PhysRevC.105.L052802
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
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
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
2020VI04 Phys.Rev. C 101, 034312 (2020) M.Vilen, J.M.Kelly, A.Kankainen, M.Brodeur, A.Aprahamian, L.Canete, R.P.de Groote, A.de Roubin, T.Eronen, A.Jokinen, I.D.Moore, M.R.Mumpower, D.A.Nesterenko, J.O'Brien, A.Pardo Perdomo, H.Penttila, M.Reponen, S.Rinta-Antila, R.Surman Exploring the mass surface near the rare-earth abundance peak via precision mass measurements at JYFLTRAP ATOMIC MASSES 154Nd, 161Pm, 163Sm, 162,162m,163,164,165Eu, 163,163m,167Gd, 165,166,167,168Tb; measured time-of-flight ion-cyclotron-resonances (TOF-ICR) and phase-imaging ion-cyclotron-resonances (PI-ICR), frequency ratios, mass excesses using the JYFLTRAP double penning trap at the IGISOL facility of University of Jyvaskyla; deduced S(n), S(2n), pairing-gap energies, and average proton neutron interaction of valence nucleons. 162mEu, 163mGd; deduced absolute energies of the isomers. Comparison with previous experimental measurements, and with evaluated data in AME2016. Isotopes formed in U(p, F), E=25 MeV reaction. Discussed impact on solar r-process abundances as a function of the mass number.
doi: 10.1103/PhysRevC.101.034312
2019HO18 J.Phys.(London) G46, 083001 (2019) C.J.Horowitz, A.Arcones, B.Cote, I.Dillmann, W.Nazarewicz, I.U.Roederer, H.Schatz, A.Aprahamian, D.Atanasov, A.Bauswein, T.C.Beers, J.Bliss, M.Brodeur, J.A.Clark, A.Frebel, F.Foucart, C.J.Hansen, O.Just, A.Kankainen, G.C.McLaughlin, J.M.Kelly, S.N.Liddick, D.M.Lee, J.Lippuner, D.Martin, J.Mendoza-Temis, B.D.Metzger, M.R.Mumpower, G.Perdikakis, J.Pereira, B.W.O'Shea, R.Reifarth, A.M.Rogers, D.M.Siegel, A.Spyrou, R.Surman, X.Tang, T.Uesaka, M.Wang r-process nucleosynthesis: connecting rare-isotope beam facilities with the cosmos
doi: 10.1088/1361-6471/ab0849
2019YO03 Phys.Rev. C 100, 031302(R) (2019) R.Yokoyama, R.Grzywacz, B.C.Rasco, N.Brewer, K.P.Rykaczewski, I.Dillmann, J.L.Tain, S.Nishimura, D.S.Ahn, A.Algora, J.M.Allmond, J.Agramunt, H.Baba, S.Bae, C.G.Bruno, R.Caballero-Folch, F.Calvino, P.J.Coleman-Smith, G.Cortes, T.Davinson, C.Domingo-Pardo, A.Estrade, N.Fukuda, S.Go, C.J.Griffin, J.Ha, O.Hall, L.J.Harkness-Brennan, J.Heideman, T.Isobe, D.Kahl, M.Karny, T.Kawano, L.H.Khiem, T.T.King, G.G.Kiss, A.Korgul, S.Kubono, M.Labiche, I.Lazarus, J.Liang, J.Liu, G.Lorusso, M.Madurga, K.Matsui, K.Miernik, F.Montes, A.I.Morales, P.Morrall, N.Nepal, R.D.Page, V.H.Phong, M.Piersa, M.Prydderch, V.F.E.Pucknell, M.M.Rajabali, B.Rubio, Y.Saito, H.Sakurai, Y.Shimizu, J.Simpson, M.Singh, D.W.Stracener, T.Sumikama, R.Surman, H.Suzuki, H.Takeda, A.Tarifeno-Saldivia, S.L.Thomas, A.Tolosa-Delgado, M.Wolinska-Cichocka, P.J.Woods, X.X.Xu Strong one-neutron emission from two-neutron unbound states in β decays of the r-process nuclei 86, 87Ga RADIOACTIVITY 84,85,86,87Ga(β-), (β-n), (β-2n)[from 9Be(238U, F), E=345 MeV/nucleon, followed by separation and identification of fragments using the BigRIPS in-flight separator at RIBF-RIKEN facility]; measured secondary ions implanted into active stoppers made of double-sided silicon-strip detectors (DSSSDs), neutrons by BRIKEN array of 3He counters, WAS3ABi for β and ion detection, and γ rays by two clover-type HPGe detectors, (ions)βn-coin, half-lives of decays of 84,85,86,87Ga; deduced decay curves, %β-n (P1n) and %β-2n (P2n). Comparison with shell-model and QRPA calculations. Relevance to r-process modeling.
doi: 10.1103/PhysRevC.100.031302
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
2018OR02 Phys.Rev.Lett. 120, 262702 (2018) R.Orford, N.Vassh, J.A.Clark, G.C.McLaughlin, M.R.Mumpower, G.Savard, R.Surman, A.Aprahamian, F.Buchinger, M.T.Burkey, D.A.Gorelov, T.Y.Hirsh, J.W.Klimes, G.E.Morgan, A.Nystrom, K.S.Sharma Precision Mass Measurements of Neutron-Rich Neodymium and Samarium Isotopes and Their Role in Understanding Rare-Earth Peak Formation ATOMIC MASSES 154,156,158,159,160Nd, 162,163,164Sm; measured cyclotron frequency ratios; deduced mass excess values. Comparison with AME16 evaluation.
doi: 10.1103/PhysRevLett.120.262702
2018TA20 Acta Phys.Pol. B49, 417 (2018) J.L.Tain, J.Agramunt, D.S.Ahn, A.Algora, J.M.Allmond, H.Baba, S.Bae, N.T.Brewer, R.Caballero-Folch, F.Calvino, P.J.Coleman-Smith, G.Cortes, T.Davinson, I.Dillmann, C.Domingo-Pardo, A.Estrade, N.Fukuda, S.Go, C.Griffin, R.Grzywacz, J.Ha, O.Hall, L.Harkness-Brennan, T.Isobe, D.Kahl, M.Karny, G.G.Kiss, M.Kogimtzis, A.Korgul, S.Kubono, M.Labiche, I.Lazarus, J.Lee, J.Liu, G.Lorusso, K.Matsui, K.Miernik, F.Montes, B.Moon, A.I.Morales, N.Nepal, S.Nishimura, R.D.Page, Z.Podolyak, V.F.E.Pucknell, B.C.Rasco, P.H.Regan, A.Riego, B.Rubio, K.P.Rykaczewski, Y.Saito, H.Sakurai, Y.Shimizu, J.Simpson, P.A.Soderstrom, D.W.Stracener, T.Sumikama, R.Surman, H.Suzuki, M.Takechi, H.Takeda, A.Tarifeno-Saldivia, S.L.Thomas, A.Tolosa-Delgado, V.H.Phong, P.Woods The BRIKEN Project: Extensive Measurements of β-delayed Neutron Emitters for the Astrophysical r Process
doi: 10.5506/aphyspolb.49.417
2018VI02 Phys.Rev.Lett. 120, 262701 (2018) M.Vilen, J.M.Kelly, A.Kankainen, M.Brodeur, A.Aprahamian, L.Canete, T.Eronen, A.Jokinen, T.Kuta, I.D.Moore, M.R.Mumpower, D.A.Nesterenko, H.Penttila, I.Pohjalainen, W.S.Porter, S.Rinta-Antila, R.Surman, A.Voss, J.Aysto Precision Mass Measurements on Neutron-Rich Rare-Earth Isotopes at JYFLTRAP: Reduced Neutron Pairing and Implications for r-Process Calculations ATOMIC MASSES 156,158Nd, 158,160Pm, 162Sm, 162,163Eu, 163,164,165,166Gd, 164Tb; measured time-of-flight spectra, frequency ratios; deduced mass-excess values. Comparison with AME16 evaluation.
doi: 10.1103/PhysRevLett.120.262701
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
2017MU08 J.Phys.(London) G44, 034003 (2017) M.R.Mumpower, G.C.McLaughlin, R.Surman, A.W.Steiner Reverse engineering nuclear properties from rare earth abundances in the r process COMPILATION A<250; compiled experimental nuclear reaction and structure data.
doi: 10.1088/1361-6471/44/3/034003
2017SP03 J.Phys.(London) G44, 044002 (2017) A.Spyrou, A.C.Larsen, S.N.Liddick, F.Naqvi, B.P.Crider, A.C.Dombos, M.Guttormsen, D.L.Bleuel, A.Couture, L.Crespo Campo, R.Lewis, S.Mosby, M.R.Mumpower, G.Perdikakis, C.J.Prokop, S.J.Quinn, T.Renstrom, S.Siem, R.Surman Neutron-capture rates for explosive nucleosynthesis: the case of 68Ni(n, γ)69Ni RADIOACTIVITY 69Co(β-); measured decay products, Eγ, Iγ; deduced the γ-ray strength function and the nuclear level density, T1/2. Comparison with available data.
doi: 10.1088/1361-6471/aa5ae7
2016AL10 Phys.Rev. C 93, 044325 (2016) M.F.Alshudifat, R.Grzywacz, M.Madurga, C.J.Gross, K.P.Rykaczewski, J.C.Batchelder, C.Bingham, I.N.Borzov, N.T.Brewer, L.Cartegni, A.Fijalkowska, J.H.Hamilton, J.K.Hwang, S.V.Ilyushkin, C.Jost, M.Karny, A.Korgul, W.Krolas, S.H.Liu, C.Mazzocchi, A.J.Mendez, K.Miernik, D.Miller, S.W.Padgett, S.V.Paulauskas, A.V.Ramayya, D.W.Stracener, R.Surman, J.A.Winger, M.Wolinska-Cichocka, E.F.Zganjar Reexamining Gamow-Teller decays near 78Ni RADIOACTIVITY 82,83Zn, 82,83Ga(β-), (β-n)[from 238U(p, F), E=50 MeV]; measured Eγ, Iγ, Eβ, βγ-, γγ-coin, half-lives of decay of 82,83Zn, 83Ga, β-delayed neutron branching ratio Pn for 82Zn decay at HRIBF-ORNL facility. 81,82,83Ga, 81,82Ge; deduced levels, J, π, beta feedings, logft. Comparison of level spectra with shell-model calculations, and with previous experimental results. 82,83Zn, 82,83Ga(β-); calculated B(GT) strengths using shell-model with NUSHELLX computer code.
doi: 10.1103/PhysRevC.93.044325
2016LI30 Phys.Rev.Lett. 116, 242502 (2016) S.N.Liddick, A.Spyrou, B.P.Crider, F.Naqvi, A.C.Larsen, M.Guttormsen, M.Mumpower, R.Surman, G.Perdikakis, D.L.Bleuel, A.Couture, L.C.Campo, A.C.Dombos, R.Lewis, S.Mosby, S.Nikas, C.J.Prokop, T.Renstrom, B.Rubio, S.Siem, S.J.Quinn Experimental Neutron Capture Rate Constraint Far from Stability RADIOACTIVITY 70Co(β-) [from 9Be(86Kr, X), E=140 MeV/nucleon]; measured decay products, Eγ, Iγ; deduced nuclear level density as a function of excitation energy. Comparison with available data. NUCLEAR REACTIONS 69Ni(n, γ), E<10 GK; calculated nuclear reaction capture rates using experimental level densities and code TALYS.
doi: 10.1103/PhysRevLett.116.242502
2016MU01 Prog.Part.Nucl.Phys. 86, 86 (2016); Erratum Prog.Part.Nucl.Phys. 87, 116 (2016) M.R.Mumpower, R.Surman, G.C.McLaughlin, A.Aprahamian The impact of individual nuclear properties on r-process nucleosynthesis
doi: 10.1016/j.ppnp.2015.09.001
2016SH39 Phys.Rev. C 94, 055802 (2016) T.Shafer, J.Engel, C.Frohlich, G.C.McLaughlin, M.Mumpower, R.Surman β decay of deformed r-process nuclei near A=80 and A=160, including odd-A and odd-odd nuclei, with the Skyrme finite-amplitude method RADIOACTIVITY 68,69,70,71,72Cr, 71,72,73,74,75Mn, 72,73,74,75,76Fe, 76,77Co, 80,81Cu, 84,85,86Zn, 86,87Ga, 86,87,88,89,90,91,92Ge, 89,90,91,92,93,94,95As, 92,93,94,95,96,97,98Se, 157,159,161,163,165,167Cs, 163,165,167,169,171,173,175La, 146,148,150,152,160,164,166,168,170,172,174,176Ce, 152,154,156,164,166,172,174,176,178Nd(β-); calculated half-lives using proton-neutron finite-amplitude method (pn-FAM) with Skyrme energy-density functionals (EDFs) in the quasiparticle random-phase approximation (QRPA), after optimizing the nuclear interaction to best fit the measured half-lives in A=80 and A=160 regions. Deduced r-process abundances. Comparison with other theoretical calculations and experimental values.
doi: 10.1103/PhysRevC.94.055802
2016SU08 Acta Phys.Pol. B47, 673 (2016) R.Surman, M.Mumpower, A.Aprahamian Uncorrelated Nuclear Mass Uncertainties and r-process Abundance Predictions NUCLEAR STRUCTURE A=50-220; calculated isotopic yields and abundances of elements produced during the r-process.
doi: 10.5506/APhysPolB.47.673
2015MU04 J.Phys.(London) G42, 034027 (2015) M.Mumpower, R.Surman, D.L.Fang, M.Beard, A.Aprahamian The impact of uncertain nuclear masses near closed shells on the r-process abundance pattern
doi: 10.1088/0954-3899/42/3/034027
2015MU12 Phys.Rev. C 92, 035807 (2015) M.R.Mumpower, R.Surman, D.-L.Fang, M.Beard, P.Moller, T.Kawano, A.Aprahamian Impact of individual nuclear masses on r-process abundances NUCLEAR STRUCTURE Z=30-75, N=60-130, A=120-210; calculated relevant Q values, neutron capture rates, photodissociation rates, β-decay rates, and β-delayed neutron emission probabilities using the 2012 version of the Finite-Range Droplet Model (FRDM), and by considering variations of individual nuclear masses; deduced influence of uncertainties in individual masses on the r-process abundance distribution.
doi: 10.1103/PhysRevC.92.035807
2013MA87 Phys.Rev. C 88, 064320 (2013) C.Mazzocchi, R.Surman, R.Grzywacz, J.C.Batchelder, C.R.Bingham, D.Fong, J.H.Hamilton, J.K.Hwang, M.Karny, W.Krolas, S.N.Liddick, P.F.Mantica, A.C.Morton, W.F.Mueller, K.P.Rykaczewski, M.Steiner, A.Stolz, J.A.Winger, I.N.Borzov New half-lives of very neutron-rich iron isotopes NUCLEAR REACTIONS 9Be(86Kr, X)69Fe/70Fe/71Fe/72Fe, E=140 MeV/nucleon; measured reaction products and half-lives using A1900 separator at NSCL-MSU cyclotron facility. RADIOACTIVITY 69,70,71,72Fe(β-)[from 9Be(86Kr, X), E=140 MeV/nucleon]; measured Eβ, Eγ, βγ-coin, half-lives. Comparison with theoretical calculations using FRDM+QRPA, DF3a+CQRPA, and gross theory (GT2+HF-09).
doi: 10.1103/PhysRevC.88.064320
2013MI13 Phys.Rev. C 88, 014309 (2013) K.Miernik, K.P.Rykaczewski, R.Grzywacz, C.J.Gross, D.W.Stracener, J.C.Batchelder, N.T.Brewer, L.Cartegni, A.Fijalkowska, J.H.Hamilton, J.K.Hwang, S.V.Ilyushkin, C.Jost, M.Karny, A.Korgul, W.Krolas, S.H.Liu, M.Madurga, C.Mazzocchi, A.J.Mendez, D.Miller, S.W.Padgett, S.V.Paulauskas, A.V.Ramayya, R.Surman, J.A.Winger, M.Wolinska-Cichocka, E.F.Zganjar β-decay study of neutron-rich bromine and krypton isotopes RADIOACTIVITY 93Br, 93,94Kr(β-), (β-n)[from 238U(p, F), E=50 MeV]; measured Eβ, Eγ, Iγ, βγ-, γγ-coin, T1/2, delayed neutron emission probability P(n) using LeRIBSS system at HRIBF facility. 92,93Kr; deduced levels, J, π. 92Rb, 93Y(β-); observed gamma rays. Comparison of half-lives and P(n) values with previous experimental studies, and with model predictions.
doi: 10.1103/PhysRevC.88.014309
2012BR17 Eur.Phys.J. A 48, 184 (2012) S.Brett, I.Bentley, N.Paul, R.Surman, A.Aprahamian Sensitivity of the r-process to nuclear masses COMPILATION Sn; compiled masses, Q from AME-2003, Duflo-Zucker, HFB-21 and FRDM calculations. A≈70-210 suggested, evaluated new mass formula. A≈125-240; compiled, calculated r-process abundances for different scenarii, neutron Q-values.
doi: 10.1140/epja/i2012-12184-4
2012MA37 Phys.Rev.Lett. 109, 112501 (2012) M.Madurga, R.Surman, I.N.Borzov, R.Grzywacz, K.P.Rykaczewski, C.J.Gross, D.Miller, D.W.Stracener, J.C.Batchelder, N.T.Brewer, L.Cartegni, J.H.Hamilton, J.K.Hwang, S.H.Liu, S.V.Ilyushkin, C.Jost, M.Karny, A.Korgul, W.Krolas, A.Kuzniak, C.Mazzocchi, A.J.Mendez, K.Miernik, W.Padgett, S.V.Paulauskas, A.V.Ramayya, J.A.Winger, M.Wolinska-Cichocka, E.F.Zganjar New Half-lives of r-process Zn and Ga Isotopes Measured with Electromagnetic Separation RADIOACTIVITY 82,83Zn, 85Ga(β-); measured decay products, Eγ, Iγ, Eβ, Iβ; deduced T1/2. Comparison with FRDM, QRPA, density functional calculations.
doi: 10.1103/PhysRevLett.109.112501
2012MU06 Phys.Rev. C 85, 045801 (2012) M.R.Mumpower, G.C.McLaughlin, R.Surman Formation of the rare-earth peak: Gaining insight into late-time r-process dynamics ATOMIC MASSES A=150-180, N=90-115; calculated effects of neutron capture rates, S(n) and β-decay rates on rare earth peak formation in elemental abundance plot using three nuclear data set simulations: ETFSI-Q, FRDM and HFB-17. R-process nucleosynthesis. Comparison between hot and cold r-process environments and with nuclear models.
doi: 10.1103/PhysRevC.85.045801
2012MU11 Phys.Rev. C 86, 035803 (2012) M.R.Mumpower, G.C.McLaughlin, R.Surman Influence of neutron capture rates in the rare earth region on the r-process abundance pattern NUCLEAR STRUCTURE Z=58-66, N=94-109, A=153-175; calculated sensitivity of rare earth elemental abundances to neutron capture rates in the rare earth region of the r-process abundance pattern. Introduced concepts of large nuclear flow and flow saturation.
doi: 10.1103/PhysRevC.86.035803
2012QU01 Phys.Rev. C 85, 035807 (2012) M.Quinn, A.Aprahamian, J.Pereira, R.Surman, O.Arndt, T.Baumann, A.Becerril, T.Elliot, A.Estrade, D.Galaviz, T.Ginter, M.Hausmann, S.Hennrich, R.Kessler, K.-L.Kratz, G.Lorusso, P.F.Mantica, M.Matos, F.Montes, B.Pfeiffer, M.Portillo, H.Schatz, F.Schertz, L.Schnorrenberger, E.Smith, A.Stolz, W.B.Walters, A.Wohr β decay of nuclei around 90Se: Search for signatures of a N=56 subshell closure relevant to the r process NUCLEAR REACTIONS 9Be(136Xe, X)86As/87As/88As/88Se/89Se/90Se/90Br/91Br/92Br/93Br/91Kr/92Kr/93Kr/94Kr/95Kr/93Rb/94Rb/95Rb/96Rb/97Rb/95Sr/96Sr/97Sr/98Sr/99Sr/97Y/98Y/99Y/100Y/101Y/100Zr/101Zr/102Zr/103Zr, E=120 MeV/nucleon; measured fragment spectra by energy loss and time-of-flight, total kinetic energies (TKE) of 97,98,99Sr fragments in 36+, 37+, 38+ charge states, half-lives by fragment-β correlations. Beta Counting System (BCS) at NSCL. RADIOACTIVITY 87,88As, 88,89,90Se, 90,91,92,93Br, 93,94,95Kr, 95,96,97Rb, 96,97,98,99Sr, 99,100,101Y(β-)[from 9Be(136Xe, X), E=120 MeV/nucleon]; measured Eβ, Eγ, (fragment)β correlations, half-lives. Beta Counting System (BCS) at NSCL and SEGA array. Maximum likelihood and least-squares analyses for half-lives. Comparison of measured half-lives with QRPA calculations used in r process, and with previous measurements. Role of g9/2 proton and h11/2 neutron intruders. No evidence of N=56 subshell closure in 90Se. Relevance to r-process nuclei.
doi: 10.1103/PhysRevC.85.035807
2010KI02 Phys.Rev. C 81, 025802 (2010) L.-T.Kizivat, G.Martinez-Pinedo, K.Langanke, R.Surman, G.C.McLaughlin ψ-ray bursts black hole accretion disks as a site for the νp process
doi: 10.1103/PhysRevC.81.025802
2009BE01 J.Phys.(London) G36, 025201 (2009) J.Beun, J.C.Blackmon, W.R.Hix, G.C.McLaughlin, M.S.Smith, R.Surman Neutron capture on 130Sn during r-process freeze-out
doi: 10.1088/0954-3899/36/2/025201
2009SU07 Phys.Rev. C 79, 045809 (2009) R.Surman, J.Beun, G.C.McLaughlin, W.R.Hix Neutron capture rates near A=130 that effect a global change to the r-process abundance distribution NUCLEAR REACTIONS Sn, In, Cd(n, γ); calculated σ for A=105-155, neutron capture rates, separation energies. Implications for r-process model.
doi: 10.1103/PhysRevC.79.045809
2008BE07 Phys.Rev. C 77, 035804 (2008) J.Beun, G.C.McLaughlin, R.Surman, W.R.Hix Fission cycling in a supernova r process
doi: 10.1103/PhysRevC.77.035804
2008SU04 J.Phys.(London) G35, 014059 (2008) R.Surman, J.Beun, G.C.McLaughlin, S.Kane, W.R.Hix The role of neutrinos in r-process nucleosynthesis in supernovae and gamma-ray bursts
doi: 10.1088/0954-3899/35/1/014059
2006KN01 J.Phys.(London) G32, 443 (2006) J.P.Kneller, G.C.McLaughlin, R.A.Surman Neutrino scattering, absorption and annihilation above the accretion discs of gamma ray bursts
doi: 10.1088/0954-3899/32/4/004
2005MC10 Nucl.Phys. A758, 189c (2005) Prospects for obtaining an r process from Gamma Ray Burst Disk Winds
doi: 10.1016/j.nuclphysa.2005.05.036
2001SU15 Phys.Rev. C64, 035801 (2001) Changes in r-Process Abundances at Late Times
doi: 10.1103/PhysRevC.64.035801
1999EN03 Phys.Rev. C60, 014302 (1999) J.Engel, M.Bender, J.Dobaczewski, W.Nazarewicz, R.Surman β Decay Rates of r-Process Waiting-Point Nuclei in a Self-Consistent Approach RADIOACTIVITY 76,78,80Zn, 82Ge, 124,126,128,130Cd, 68,70,72,74,76,78Ni, 82Ge, 80Zn, 78Ni, 76Fe, 74Cr, 72Ti(β-); calculated β-decay T1/2 vs pairing strength. Self-consistent approach. Implications for nucleosynthesis discussed.
doi: 10.1103/PhysRevC.60.014302
1998PO20 Nucl.Phys. A644, 263 (1998) D.C.Powell, C.Iliadis, A.E.Champagne, S.E.Hale, V.Y.Hansper, R.A.Surman, K.D.Veal Low-Energy Resonance Strengths for Proton Capture on Mg and Al Nuclei NUCLEAR REACTIONS 24,25,26Mg, 27Al(p, p), E ≈ 330-450 MeV; measured σ(θ). 24,25,26Mg, 27Al(p, γ), E ≈ 330-450 MeV; measured Eγ, Iγ; deduced γ-ray brancing ratios, resonance strengths.
doi: 10.1016/S0375-9474(98)00593-4
1998SU25 Phys.Rev. C58, 2526 (1998) Neutrino Capture by r-Process Waiting-Point Nuclei NUCLEAR REACTIONS 78Ni, 124Mo, 190Gd(ν, X), E < 25 MeV; calculated spectrum-averaged capture σ; deduced role of low-lying Gamow-Teller and first forbidden strengths.
doi: 10.1103/PhysRevC.58.2526
1997SU19 Phys.Rev.Lett. 79, 1809 (1997) R.Surman, J.Engel, J.R.Bennett, B.S.Meyer Source of the Rare-Earth Element Peak in r-Process Nucleosynthesis NUCLEAR STRUCTURE A=150-175; analyzed r-process abundance distribution; deduced rare-earth element peak associated features in nucleosynthesis.
doi: 10.1103/PhysRevLett.79.1809
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