NSR Query Results
Output year order : Descending NSR database version of April 11, 2024. Search: Author = R.Talwar Found 33 matches. 2023NE04 Phys.Rev. C 107, 035801 (2023) D.Neto, K.Bailey, J.F.Benesch, B.Cade, B.DiGiovine, A.Freyberger, J.M.Grames, A.Hofler, R.J.Holt, R.Kazimi, D.Meekins, M.McCaughan, D.Moser, T.O'Connor, M.Poelker, K.E.Rehm, S.Riordan, R.Suleiman, R.Talwar, C.Ugalde Measuring the cross section of the 15N(α, γ)19F reaction using a single-fluid bubble chamber NUCLEAR REACTIONS 19F(γ, α)15N, E=4.0-5.4 MeV bremsstrahlung beam; measured reaction products; deduced yields, excitation functions, σ(E). 15N(α, γ)19F, E=4.7-5.4; deduced σ(E) using reciprocity theorem. Comparison to other experimental data. Single-fluid bubble chamber filled with C3F8 superheated liquid at the Thomas Jefferson National Accelerator Facility.
doi: 10.1103/PhysRevC.107.035801
2022JA08 Phys.Rev. C 105, L042802 (2022) H.Jayatissa, M.L.Avila, K.E.Rehm, R.Talwar, P.Mohr, K.Auranen, J.Chen, D.A.Gorelov, C.R.Hoffman, C.L.Jiang, B.P.Kay, S.A.Kuvin, D.Santiago-Gonzalez First direct measurement of the 13N(α, p)16O reaction relevant for core-collapse supernovae nucleosynthesis NUCLEAR REACTIONS 4He(13N, p), E=34.6 MeV; measured energies and yields of reaction products; deduced σ(Ε) in the range E(cm)=3.26–6.02 MeV, astrophysical S-factor. 4He(13N, p), T=0.8-10.0 GK; deduced astrophysical reaction rates. Comparison to other experimental data, TALYS calculations and data from REACLIB. MUlti-Sampling Ionization Chamber (MUSIC) detector filled with He-Kr gas mixture at ATLAS (ANL).
doi: 10.1103/PhysRevC.105.L042802
2021CH16 Phys.Rev. C 103, 035809 (2021) Y.Chen, G.P.A.Berg, R.J.deBoer, J.Gorres, H.Jung, A.Long, K.Seetedohnia, R.Talwar, M.Wiescher, S.Adachi, H.Fujita, Y.Fujita, K.Hatanaka, C.Iwamoto, B.Liu, S.Noji, H.-J.Ong, A.Tamii Neutron transfer studies on 25Mg and its correlation to neutron radiative capture processes NUCLEAR REACTIONS 25Mg(d, p)26Mg, E=56 MeV; measured E(p), I(p), σ(θ) using Grand Raiden (GR) spectrometer at the RCNP, AVF cyclotron facility. 26Mg; deduced levels, J, π, L-transfers, spectroscopic factors, and compared with previous experimental results for levels populated in (d, p) and (n, γ) reactions. 25Mg(n, γ)26Mg, E<275 keV; deduced σ(E) using the structure parameters such as level energies and widths from surrogate (d, p) neutron transfer reaction and R-matrix analysis. Relevance to proton-induced nucleosynthesis in the CNO cycles and the rp process.
doi: 10.1103/PhysRevC.103.035809
2019AU02 Phys.Lett. B 792, 187 (2019) K.Auranen, D.Seweryniak, M.Albers, A.D.Ayangeakaa, S.Bottoni, M.P.Carpenter, C.J.Chiara, P.Copp, H.M.David, D.T.Doherty, J.Harker, C.R.Hoffman, R.V.F.Janssens, T.L.Khoo, S.A.Kuvin, T.Lauritsen, G.Lotay, A.M.Rogers, C.Scholey, J.Sethi, R.Talwar, W.B.Walters, P.J.Woods, S.Zhu Proton decay of 108I and its significance for the termination of the astrophysical rp-process RADIOACTIVITY 108I(α), (p), 109I(p), 107,108Te(α) [from 54Fe(58Ni, X)108I/109I/108Te/107Te, E=254 MeV]; measured Eα, Iα, Ep, Ip; deduced Q-values, T1/2, mass excesses, branching ratio. Comparison with theoretical calculations.
doi: 10.1016/j.physletb.2019.03.039
2019CH51 Phys.Rev. C 100, 064314 (2019) J.Chen, K.Auranen, M.L.Avila, B.B.Back, M.A.Caprio, C.R.Hoffman, D.Gorelov, B.P.Kay, S.A.Kuvin, Q.Liu, J.L.Lou, A.O.Macchiavelli, D.G.McNeel, T.L.Tang, D.Santiago-Gonzalez, R.Talwar, J.Wu, G.Wilson, R.B.Wiringa, Y.L.Ye, C.X.Yuan, H.L.Zang Experimental study of the low-lying negative-parity states in 11Be using the 12B (d, 3He) 11Be reaction NUCLEAR REACTIONS 2H(12B, 3He)11Be, (12B, 12B'), E=12 MeV/nucleon, [secondary 12Be beam from 2H(11B, 12B), E=13.5 MeV/nucleon primary reaction]; measured reaction products, E(3He), I(3He), (3He)(11Be)- and (3He)(10Be)-coin, σ(θ) using the HELical Orbit Spectrometer (HELIOS) at the ATLAS In-Flight facility at ANL. Deuterated polyethylene (CD2)n target. 11Be; deduced levels, l-transfers, configurations, spectroscopic factors. Distorted wave Born approximation (DWBA) analysis. Comparison with previous experimental data, and with results from variational Monte Carlo and no-core shell-model calculations. Comparison with 11B(d, 3He)10Be experimental data.
doi: 10.1103/PhysRevC.100.064314
2019PA57 Nucl.Instrum.Methods Phys.Res. B438, 172 (2019) R.C.Pardo, T.Palchan-Hazan, R.Scott, M.Paul, O.Nusair, W.Bauder, R.Vondrasek, D.Seweryniak, S.Baker, R.Talwar, P.Collon, F.G.Kondev, G.Youinou, M.Salvatores, G.Palmiotti, J.Berg, J.Giglio, M.T.Giglio, G.Imel, C.Nair, C.L.Jiang Laser Ablation Positive-Ion AMS of Neutron Activated Actinides NUCLEAR REACTIONS 236U, 242Pu(n, X), E not given; measured reaction products; deduced neutron transmutation rates by accelerator mass spectrometry.
doi: 10.1016/j.nimb.2018.05.004
2018AS03 Nucl.Instrum.Methods Phys.Res. A899, 6 (2018) B.W.Asher, S.Almaraz-Calderon, O.Nusair, K.E.Rehm, M.L.Avila, A.A.Chen, C.A.Dickerson, C.L.Jiang, B.P.Kay, R.C.Pardo, D.Santiago-Gonzalez, R.Talwar Development of an Isomeric beam of 26Al for nuclear reaction studies NUCLEAR REACTIONS 1H(26Mg, 26Al), E=158.5 MeV; measured reaction products, Eγ, Iγ. 26mAl; deduced σ. Comparison with available data.
doi: 10.1016/j.nima.2018.05.015
2018AU04 Phys.Rev.Lett. 121, 182501 (2018) K.Auranen, D.Seweryniak, M.Albers, A.D.Ayangeakaa, S.Bottoni, M.P.Carpenter, C.J.Chiara, P.Copp, H.M.David, D.T.Doherty, J.Harker, C.R.Hoffman, R.V.F.Janssens, T.L.Khoo, S.A.Kuvin, T.Lauritsen, G.Lotay, A.M.Rogers, J.Sethi, C.Scholey, R.Talwar, W.B.Walters, P.J.Woods, S.Zhu Superallowed α Decay to Doubly Magic 100Sn RADIOACTIVITY 108Xe, 104Te(α) [from 54Fe(58Ni, 4n)108Xe, E=245 MeV]; measured decay products, Eα, Iα; deduced α-particles energies, T1/2. A heavy self-conjugate nucleus, comparison with available data.
doi: 10.1103/PhysRevLett.121.182501
2018CH36 Phys.Rev. C 98, 014325 (2018) J.Chen, C.R.Hoffman, T.Ahn, K.Auranen, M.L.Avila, B.B.Back, D.W.Bardayan, D.Blankstein, P.Copp, D.Gorelov, B.P.Kay, S.A.Kuvin, J.P.Lai, D.G.McNeel, P.D.O'Malley, A.M.Rogers, D.Santiago-Gonzalez, J.P.Schiffer, J.Sethi, R.Talwar, J.R.Winkelbauer Experimental study of the effective nucleon-nucleon interaction using the 21F(d, p)22F reaction NUCLEAR REACTIONS 2H(21F, p), E=10 MeV/nucleon, [21F secondary beam from 9Be(22Ne, 21F), E=11 MeV/nucleon primary reaction using ATLAS-ANL facility]; measured Ep, Ip, 22Fe recoils, (22F)p-coin, and σ(θ) using HELIcal Orbit Spectrometer (HELIOS). 22F; deduced levels, J, π, spectroscopic factors and strengths, energy centroids and diagonal particle-hole two-body matrix elements (TBMEs) as function of angular momentum, N=14, 16 shell gaps. Distorted wave Born approximation (DWBA) method for theoretical σ(θ) calculations. Comparison with theoretical spectroscopic strengths by shell-model calculation using the USDA and USDB interactions.
doi: 10.1103/PhysRevC.98.014325
2018JI01 Phys.Rev. C 97, 012801 (2018) C.L.Jiang, D.Santiago-Gonzalez, S.Almaraz-Calderon, K.E.Rehm, B.B.Back, K.Auranen, M.L.Avila, A.D.Ayangeakaa, S.Bottoni, M.P.Carpenter, C.Dickerson, B.DiGiovine, J.P.Greene, C.R.Hoffman, R.V.F.Janssens, B.P.Kay, S.A.Kuvin, T.Lauritsen, R.C.Pardo, J.Sethi, D.Seweryniak, R.Talwar, C.Ugalde, S.Zhu, D.Bourgin, S.Courtin, F.Haas, M.Heine, G.Fruet, D.Montanari, D.G.Jenkins, L.Morris, A.Lefebvre-Schuhl, M.Alcorta, X.Fang, X.D.Tang, B.Bucher, C.M.Deibel, S.T.Marley Reaction rate for carbon burning in massive stars NUCLEAR REACTIONS 12C(12C, p)23Na, (12C, α)20Ne, E=5.5-10 MeV; measured Eγ, Iγ, (particle)γ-coin, σ(E) using Gammasphere array and an array of three annular double-sided silicon strip detectors at the ATLAS-ANL facility; deduced S factors and astrophysical reaction rates. Comparison with previous measurements, and with data from other reactions. Relevance to carbon burning is a critical phase for nucleosynthesis in massive stars.
doi: 10.1103/PhysRevC.97.012801
2018LO11 Phys.Rev. C 97, 054613 (2018) A.M.Long, T.Adachi, M.Beard, G.P.A.Berg, M.Couder, R.J.deBoer, M.Dozono, J.Gorres, H.Fujita, Y.Fujita, K.Hatanaka, D.Ishikawa, T.Kubo, H.Matsubara, Y.Namiki, S.O'Brien, Y.Ohkuma, H.Okamura, H.J.Ong, D.Patel, Y.Sakemi, Y.Shimbara, S.Suzuki, R.Talwar, A.Tamii, A.Volya, T.Wakasa, R.Watanabe, M.Wiescher, R.Yamada, J.Zenihiro α-unbound levels in 34Ar from 36Ar(p, t)34Ar reaction measurements and implications for the astrophysical 30S (α, p)33Cl reaction rate NUCLEAR REACTIONS 36Ar(p, t), E=100 MeV; measured triton spectra, σ(θ) using Grand Raiden spectrograph at RCNP, Osaka. 34Ar; deduced levels, α-unbound states; calculated single proton widths, spin distributions for selected excitation energies, and α-spectroscopic factors using back-shifted Fermi gas (BSFG) model and shell model calculations. Comparison of 34Ar levels in several previous experiments. 30S(α, p)33Cl, T9=0.10-3.0; calculated astrophysical reaction rates at temperatures relevant to x-ray bursts (XRB) using a Monte Carlo approach within a narrow-resonance formalism. Comparison of reaction rates with two standard Hauser-Feshbach model predictions.
doi: 10.1103/PhysRevC.97.054613
2018MO28 Phys.Rev. C 98, 045805 (2018) Cross sections of α-induced reactions slightly below doubly magic 40Ca from the statistical model NUCLEAR REACTIONS 38Ar(α, n), (α, p), (α, α)E=5-15 MeV; analyzed σ(E) experimental data with and without width fluctuation correction factor (WFCF), and with different α-nucleus optical model potentials (A-OMPs) within the statistical model using the TALYS code; deduced best fit parameters. 36,40Ar(α, p), (α, n), (α, α), 38Ca(α, p), (α, 2p), E=5-15 MeV; predicted total σ(E) and astrophysical reaction rate of 41Sc producing reaction using the best fit parameters.
doi: 10.1103/PhysRevC.98.045805
2018SA13 Phys.Rev.Lett. 120, 122503 (2018) D.Santiago-Gonzalez, K.Auranen, M.L.Avila, A.D.Ayangeakaa, B.B.Back, S.Bottoni, M.P.Carpenter, J.Chen, C.M.Deibel, A.A.Hood, C.R.Hoffman, R.V.F.Janssens, C.L.Jiang, B.P.Kay, S.A.Kuvin, A.Lauer, J.P.Schiffer, J.Sethi, R.Talwar, I.Wiedenhover, J.Winkelbauer, S.Zhu Probing the Single-Particle Character of Rotational States in 19F Using a Short-Lived Isomeric Beam NUCLEAR REACTIONS 2H(18F, p), E=14 MeV/nucleon; measured reaction products, Ep, Ip. 19F; deduced energy levels, J, π, relative spectroscopic factors, rotational band. Comparison with shell-model calculations.
doi: 10.1103/PhysRevLett.120.122503
2018TA12 Phys.Rev. C 97, 055801 (2018) R.Talwar, M.J.Bojazi, P.Mohr, K.Auranen, M.L.Avila, A.D.Ayangeakaa, J.Harker, C.R.Hoffman, C.L.Jiang, S.A.Kuvin, B.S.Meyer, K.E.Rehm, D.Santiago-Gonzalez, J.Sethi, C.Ugalde, J.R.Winkelbauer Experimental study of 38Ar + α reaction cross sections relevant to the 41Ca abundance in the solar system NUCLEAR REACTIONS 4He(38Ar, p), (38Ar, n), (38Ar, α'), E=133 MeV; measured energies and yields of reaction products, energy- and angle integrated σ(E) using multisampling ionization chamber (MUSIC) detector at the ATLAS-ANL facility. Comparison with previous experimental values, and with statistical model calculations using TALYS code. 41K(p, α)38Ar, 41Ca(n, α)38Ar, T=0.1-10.0 GK; deduced astrophysical reaction rates, and compared with statistical model calculations, and with REACLIB fits. Discussed relevance to 41Ca abundance in the solar system.
doi: 10.1103/PhysRevC.97.055801
2018TE04 Phys.Rev.Lett. 121, 112701 (2018) M.Tessler, M.Paul, S.Halfon, B.S.Meyer, R.Pardo, R.Purtschert, K.E.Rehm, R.Scott, M.Weigand, L.Weissman, S.Almaraz-Calderon, M.L.Avila, D.Baggenstos, P.Collon, N.Hazenshprung, Y.Kashiv, D.Kijel, A.Kreisel, R.Reifarth, D.Santiago-Gonzalez, A.Shor, I.Silverman, R.Talwar, D.Veltum, R.Vondrasek Stellar 36, 38Ar(n, γ)37, 39Ar Reactions and Their Effect on Light Neutron-Rich Nuclide Synthesis NUCLEAR REACTIONS 36,38Ar(n, γ), E ∼ 30 keV; measured reaction products, Eβ, Iβ; deduced thermal σ, Maxwellian average cross sections (MACS). Comparison with available data.
doi: 10.1103/PhysRevLett.121.112701
2017AL29 Phys.Rev.Lett. 119, 072701 (2017) S.Almaraz-Calderon, K.E.Rehm, N.Gerken, M.L.Avila, B.P.Kay, R.Talwar, A.D.Ayangeakaa, S.Bottoni, A.A.Chen, C.M.Deibel, C.Dickerson, K.Hanselman, C.R.Hoffman, C.L.Jiang, S.A.Kuvin, O.Nusair, R.C.Pardo, D.Santiago-Gonzalez, J.Sethi, C.Ugalde Study of the 26Alm(d, p)27Al Reaction and the Influence of the 26Al 0+ Isomer on the Destruction of 26Al in the Galaxy NUCLEAR REACTIONS C, 2H(26Al, p), E=120 MeV; measured reaction products, Eγ, Iγ. 26Al; deduced σ(θ), reaction rates. Comparison with available data, DWBA calculations.
doi: 10.1103/PhysRevLett.119.072701
2017AV03 Nucl.Instrum.Methods Phys.Res. A859, 63 (2017) M.L.Avila, K.E.Rehm, S.Almaraz-Calderon, A.D.Ayangeakaa, C.Dickerson, C.R.Hoffman, C.L.Jiang, B.P.Kay, J.Lai, O.Nusair, R.C.Pardo, D.Santiago-Gonzalez, R.Talwar, C.Ugalde Study of (α, p) and (α, n) reactions with a Multi-Sampling Ionization Chamber NUCLEAR REACTIONS 4He(17O, n), (17O, α'), E=34.8 MeV; 4He(23Na, α), (23Na, p), E=51.5, 57.4 MeV; measured reaction products, Eα, Iα, Ep, Ip; deduced σ. Comparison with available data.
doi: 10.1016/j.nima.2017.03.060
2017LO05 Phys.Rev. C 95, 055803 (2017) A.M.Long, T.Adachi, M.Beard, G.P.A.Berg, Z.Buthelezi, J.Carter, M.Couder, R.J.deBoer, R.W.Fearick, S.V.Fortsch, J.Gorres, J.P.Mira, S.H.T.Murray, R.Neveling, P.Papka, F.D.Smit, E.Sideras-Haddad, J.A.Swartz, R.Talwar, I.T.Usman, M.Wiescher, J.J.Van Zyl, A.Volya Indirect study of the stellar 34Ar(α, p)37K reaction rate through 40Ca(p, t)38Ca reaction measurements NUCLEAR REACTIONS 40Ca(p, t)38Ca, E=100 MeV; measured spectra using the K=600 magnetic spectrograph, triton spectra at K=200 Separated Sector Cyclotron facility of iThemba LABS. 38Ca; deduced levels, α-unbound states, resonances, α-spectroscopic factors. Comparison with previous experimental results. 34Ar(α, p)37K, T9=0.2-3.0; deduced reaction rates as a function of stellar temperature, and compared with theoretical model calculations using NON-SMOKER-v5.0w and TALYS 1.8 codes. Relevance to type I x-ray bursts (XRBs).
doi: 10.1103/PhysRevC.95.055803
2017TA21 Phys.Rev. C 96, 024310 (2017) R.Talwar, B.P.Kay, A.J.Mitchell, S.Adachi, J.P.Entwisle, Y.Fujita, G.Gey, S.Noji, H.J.Ong, J.P.Schiffer, A.Tamii High-j neutron excitations outside 136Xe NUCLEAR REACTIONS 136Xe(α, 3He), E=100 MeV; measured 3He spectra and σ(θ) using Grand-Raiden (GR) magnetic spectrometer, vertical drift chambers and scintillators at RCNP-Osaka accelerator facility. Enriched 136Xe target. 137Xe; deduced levels, L-transfers, J, π, spectroscopic factors, configuration. DWBA calculations using different parametrizations of optical-model potentials. Discussed details and systematics of high-j, 9/2- and 13/2+ single-neutron excitations in N=83 isotones 135Te, 137Xe, 139Ba, 141Ce, 143Nd, 145Sm, 147Gd, 149Dy, 151Er and 153Yb, and comparison with two-level mixing model calculations. NUCLEAR REACTIONS 144Sm(α, 3He)145Sm, E=100 MeV; measured reaction products; deduced absolute σ, σ(θ), outgoing 3He spectra, excitation energies, mixing matrix elements parameters, normalized spectroscopic factors.
doi: 10.1103/PhysRevC.96.024310
2016AV06 Phys.Rev. C 94, 065804 (2016) M.L.Avila, K.E.Rehm, S.Almaraz-Calderon, A.D.Ayangeakaa, C.Dickerson, C.R.Hoffman, C.L.Jiang, B.P.Kay, J.Lai, O.Nusair, R.C.Pardo, D.Santiago-Gonzalez, R.Talwar, C.Ugalde Experimental study of the astrophysically important 23Na(α, p)26Mg and 23Na(α, n)26Al reactions NUCLEAR REACTIONS 4He(23Na, p), (23Na, n), E=51.5, 57.4 MeV; measured particle spectra, and cross section using multisampling ionization chamber (MUSIC) detector at ATLAS-ANL facility. Comparison with previous measurements, NACRE compilation, and with statistical-model calculations. Technique to measure simultaneously excitation functions of angle- and excitation energy-integrated cross sections of (α, p) and (α, n) reactions. Relevance to 26Al production in massive stars.
doi: 10.1103/PhysRevC.94.065804
2016MU06 Phys.Rev. C 93, 065803 (2016) M.Munch, M.Alcorta, H.O.U.Fynbo, M.Albers, S.Almaraz-Calderon, M.L.Avila, A.D.Ayangeakaa, B.B.Back, P.F.Bertone, P.F.F.Carnelli, M.P.Carpenter, C.J.Chiara, J.A.Clark, B.DiGiovine, J.P.Greene, J.L.Harker, C.R.Hoffman, N.J.Hubbard, C.L.Jiang, O.S.Kirsebom, T.Lauritsen, K.L.Laursen, S.T.Marley, C.Nair, O.Nusair, D.Santiago-Gonzalez, J.Sethi, D.Seweryniak, R.Talwar, C.Ugalde, S.Zhu Independent measurement of the Hoyle state β feeding from 12B using Gammasphere RADIOACTIVITY 12B(β-)[from 2H(11B, p), E=40 MeV from ATLAS-ANL facility]; measured Eγ, Iγ, γγ-coin, γγ(θ) for the Hoyle state using Gammasphere array. 12C; deduced first excited 2+ and 0+ levels, β branching ratio to the Hoyle state in 12C, logft, indication of higher clustering for the Hoyle state as compared to previous results. Comparison with theoretical calculations using antisymmetrized molecular dynamics (AMD), and with previous experimental results.
doi: 10.1103/PhysRevC.93.065803
2016TA09 Phys.Rev. C 93, 055803 (2016) R.Talwar, T.Adachi, G.P.A.Berg, L.Bin, S.Bisterzo, M.Couder, R.J.deBoer, X.Fang, H.Fujita, Y.Fujita, J.Gorres, K.Hatanaka, T.Itoh, T.Kadoya, A.Long, K.Miki, D.Patel, M.Pignatari, Y.Shimbara, A.Tamii, M.Wiescher, T.Yamamoto, M.Yosoi Probing astrophysically important states in the 26Mg nucleus to study neutron sources for the s process NUCLEAR REACTIONS 26Mg(α, α'), E=206 MeV; 22Ne(6Li, d)26Mg, E=82.3 MeV; measured Eα, Iα, E(d), I(d), σ(θ) using Grand Raiden (GR) spectrometer at RCNP-Osaka. 26Mg; deduced α-unbound resonance energies, levels, J, π, α-spectroscopic factors, resonance strengths. Angular distributions for inelastic scattering analyzed by coupled channel code PTOLEMY and for transfer reactions by FRESCO code. 22Ne(α, γ)26Mg, 22Ne(α, n)25Mg, T9=0.01-10; deduced astrophysical reaction rates from resonance parameters. Comparison with previous results. Relevance to slow neutron capture process (s process) in massive stars.
doi: 10.1103/PhysRevC.93.055803
2015BU08 Phys.Rev.Lett. 114, 251102 (2015) B.Bucher, X.D.Tang, X.Fang, A.Heger, S.Almaraz-Calderon, A.Alongi, A.D.Ayangeakaa, M.Beard, A.Best, J.Browne, C.Cahillane, M.Couder, R.J.deBoer, A.Kontos, L.Lamm, Y.J.Li, A.Long, W.Lu, S.Lyons, M.Notani, D.Patel, N.Paul, M.Pignatari, A.Roberts, D.Robertson, K.Smith, E.Stech, R.Talwar, W.P.Tan, M.Wiescher, S.E.Woosley First Direct Measurement of 12C(12C, n)23Mg at Stellar Energies NUCLEAR REACTIONS 12C(12C, n), E=7.5, 9.5 MeV; measured reaction products, Eγ, Iγ, En, In; deduced yields, S-factors, astrophysical reaction rate. Comparison with available data.
doi: 10.1103/PhysRevLett.114.251102
2015QU01 Phys.Rev. C 92, 045805 (2015) S.J.Quinn, A.Spyrou, A.Simon, A.Battaglia, M.Bowers, B.Bucher, C.Casarella, M.Couder, P.A.DeYoung, A.C.Dombos, J.Gorres, A.Kontos, Q.Li, A.Long, M.Moran, N.Paul, J.Pereira, D.Robertson, K.Smith, M.K.Smith, E.Stech, R.Talwar, W.P.Tan, M.Wiescher (α, γ) cross section measurements in the region of light p nuclei NUCLEAR REACTIONS 74Ge, 90,92Zr(α, γ), E=9.5-12 MeV; measured Eγ, Iγ, σ(E) using the SuN detector and gamma-summing technique at Notre Dame Tandem Van de Graaff accelerator; deduced stellar reaction rates for 90Zr(α, γ) reaction. Nucleosynthesis of light p-process nuclei. Comparison with statistical model calculations using TALYS and NON-SMOKER codes.
doi: 10.1103/PhysRevC.92.045805
2015SI13 Phys.Rev. C 92, 025806 (2015) A.Simon, M.Beard, A.Spyrou, S.J.Quinn, B.Bucher, M.Couder, P.A.DeYoung, A.C.Dombos, J.Gorres, A.Kontos, A.Long, M.T.Moran, N.Paul, J.Pereira, D.Robertson, K.Smith, E.Stech, R.Talwar, W.P.Tan, M.Wiescher Systematic study of (α, γ) reactions for stable nickel isotopes NUCLEAR REACTIONS 58,60,61,62,64Ni(α, γ), E=5-9 MeV; measured Eγ, Iγ, σ(E) using γ-summing detector SuN at Notre Dame tandem (FN) Pelletron accelerator facility; deduced astrophysical reaction rates. Comparison with available experimental data, and with Hauser-Feshbach calculations using TALYS 1.6 code with different combinations of α-optical potentials. nuclear level densities, and E1 γ-ray strength functions. Comparisons with results in NON-SMOKER and BRUSLIB databases.
doi: 10.1103/PhysRevC.92.025806
2014QU01 Phys.Rev. C 89, 054611 (2014) S.J.Quinn, A.Spyrou, E.Bravo, T.Rauscher, A.Simon, A.Battaglia, M.Bowers, B.Bucher, C.Casarella, M.Couder, P.A.DeYoung, A.C.Dombos, J.Gorres, A.Kontos, Q.Li, A.Long, M.Moran, N.Paul, J.Pereira, D.Robertson, K.Smith, M.K.Smith, E.Stech, R.Talwar, W.P.Tan, M.Wiescher Measurement of the 58Ni(α, γ)62Zn reaction and its astrophysical impact NUCLEAR REACTIONS 58Ni(α, γ)62Zn, E=5.5-9.5 MeV; measured Eγ, Iγ, σ(E) using Summing NaI(Tl) (SuN) detector at NSL-Notre Dame facility; deduced astrophysical reaction rates. Comparison with predictions from statistical Hauser-Feshbach model using SMARAGD code. Discussed Astrophysical implications and elemental abundances.
doi: 10.1103/PhysRevC.89.054611
2014QU04 Nucl.Instrum.Methods Phys.Res. A 757, 62 (2014) S.J.Quinn, A.Spyrou, A.Simon, A.Battaglia, M.Bowers, B.Bucher, C.Casarella, M.Couder, P.A.Deyoung, A.C.Dombos, J.P.Greene, J.Gorres, A.Kontos, Q.Li, A.Long, M.Moran, N.Paul, J.Pereira, D.Robertson, K.Smith, M.K.Smith, E.Stech, R.Talwar, W.P.Tan, M.Wiescher First application of the technique in inverse kinematics NUCLEAR REACTIONS 1H(27Al, γ), 1H(58Ni, γ), 27Al(p, γ), 58Ni(p, γ), E=956 keV-1.5 GeV; measured products, Eγ, Iγ; deduced resonance parameters. Data were imported from EXFOR entry C2123.
doi: 10.1016/j.nima.2014.05.020
2013BE11 Phys.Rev. C 87, 045805 (2013) A.Best, M.Beard, J.Gorres, M.Couder, R.deBoer, S.Falahat, R.T.Guray, A.Kontos, K.-L.Kratz, P.J.LeBlanc, Q.Li, S.O'Brien, N.Ozkan, M.Pignatari, K.Sonnabend, R.Talwar, W.Tan, E.Uberseder, M.Wiescher Measurement of the reaction 17O(α, n)20Ne and its impact on the s process in massive stars NUCLEAR REACTIONS 17O(α, n), E=800-2300 keV; measured Eγ, Iγ, E(n), I(n), yields as function of incident Eα for (α, n0) and (α, n1) channels; deduced R-matrix parameters, S factors, reaction rates. 21Ne; deduced levels, resonances, J, π, width, resonance strengths. R-matrix analyses. 17O(α, n), (α, γ), E at 0.1 to 10 GK; comparison of experimental and theoretical (NACRE, CF88/1000) reaction rates. Hauser-Feshbach theory. Astrophysical implications for the s-process, and elemental abundance.
doi: 10.1103/PhysRevC.87.045805
2013BE12 Phys.Rev. C 87, 045806 (2013) A.Best, S.Falahat, J.Gorres, M.Couder, R.deBoer, R.T.Guray, A.Kontos, K.-L.Kratz, P.J.LeBlanc, Q.Li, S.O'Brien, N.Ozkan, K.Sonnabend, R.Talwar, E.Uberseder, M.Wiescher Measurement of the reaction 18O(α, n)21Ne NUCLEAR REACTIONS 18O(α, n), E=851-2300 keV; measured Eγ, Iγ, E(n), I(n), yields as function of incident Eα for (α, n0) and (α, n1) channels; deduced R-matrix parameters, S factors, reaction rates. 22Ne; deduced levels, resonances, J, π, width, resonance strengths. R-matrix analyses. 18O(α, n), (α, γ), E at 0.1 to 10 GK; comparison of experimental and theoretical (NACRE, CF88) reaction rates. Hauser-Feshbach theory.
doi: 10.1103/PhysRevC.87.045806
2013PA27 Phys.Lett. B 726, 178 (2013) D.Patel, U.Garg, M.Fujiwara, T.Adachi, H.Akimune, G.P.A.Berg, M.N.Harakeh, M.Itoh, C.Iwamoto, A.Long, J.T.Matta, T.Murakami, A.Okamoto, K.Sault, R.Talwar, M.Uchida, M.Yosoi Testing the mutually enhanced magicity effect in nuclear incompressibility via the giant monopole resonance in the 204, 206, 208Pb isotopes NUCLEAR REACTIONS 204,206,208Pb(α, X), (α, α), E<100 MeV/nucleon; measured reaction products, Eα, Iα; deduced σ(θ, E), strength distributions of the isoscalar giant monopole resonance, optical model parameters, lack of of mutually enhanced magicity effect. Comparison with available data.
doi: 10.1016/j.physletb.2013.08.027
2012BE55 J.Phys.:Conf.Ser. 387, 012003 (2012) G.P.A.Berg, Y.Fujita, J.Gorres, M.N.Harakeh, K.Hatanaka, A.Long, R.Neveling, F.D.Smit, R.Talwar, A.Tamii, M.Wiescher High precision measurements for the rp-process NUCLEAR REACTIONS 38Ca(α, p), E not given; measured Ep, Ip(θ). 40Ca(p, t), E=100 MeV; measured E(t), I(t, θ); deduced triton spectrum. 46Ti(α, 8He), E=206 MeV; measured E(particle), I(particle, θ). To be deduced rp-process reaction rates.
doi: 10.1088/1742-6596/387/1/012003
2012BU19 J.Phys.:Conf.Ser. 381, 012121 (2012) B.Bucher, J.Browne, S.Almaraz-Calderon, A.Alongi, A.D.Ayangeakaa, A.Best, M.Couder, J.DeBoer, X.Fang, W.Lu, M.Notani, D.Patel, N.Paul, A.Roberts, R.Talwar, W.Tan, X.D.Tang, A.Villano The Role of 12C(12C, n) in the Astrophysical S-Process NUCLEAR REACTIONS 12C(12C, n), E(cm)=3.54-8.74 MeV; measured thin and thick target (4.23-8.74 MeV and 3.54-4.74 MeV, respectively) β-delayed γ rays; deduced modified S-factor, reaction rates. Compared with other data and predictions.
doi: 10.1088/1742-6596/381/1/012121
2011BE17 Phys.Rev. C 83, 052802 (2011) A.Best, J.Gorres, M.Couder, R.deBoer, S.Falahat, A.Kontos, P.J.LeBlanc, Q.Li, S.O'Brien, K.Sonnabend, R.Talwar, E.Uberseder, M.Wiescher First direct measurement of resonance strengths in 17O(α, γ)21Ne NUCLEAR REACTIONS 17O(α, γ), E=750-1650 keV; measured Eγ, Iγ. 21Ne; deduced resonances, resonance strengths, levels, J, π, γ-branching ratios. Implications for neutron poisoning efficiency of 16O in the weak s-process. Comparison with previous experimental data, Caughlan-Fowler reaction rates, and calculated rates based on a microscopic three-cluster model of Descouvemont.
doi: 10.1103/PhysRevC.83.052802
Back to query form |