NSR Query Results
Output year order : Descending NSR database version of March 21, 2024. Search: Author = M.Beard Found 37 matches. 2019LA15 Phys.Rev. C 100, 034614 (2019) E.Lamere, M.Couder, M.Beard, A.Simon, A.Simonetti, M.Skulski, G.Seymour, P.Huestis, K.Manukyan, Z.Meisel, L.Morales, M.Moran, S.Moylan, C.Seymour, E.Stech Proton-induced reactions on molybdenum NUCLEAR REACTIONS 92Mo(p, α)89Nb/89mNb, (p, np)91Mo/91mMo, (p, 2p)91mNb, (p, n)92Tc, (p, γ)93Tc/93mTc, E=10.52, 13.03, 15.07, 16.07, 17.05, 18.07 MeV; 94Mo(p, α)91mNb, (p, np)93mMo, (p, 2n)93Tc/93mTc, (p, n)94Tc/94mTc, E=9.04, 10.06, 11.05, 12.05, 13.04, 14.04, 15.04, 16.06, 17.06, 18.05, 19.06 MeV; 95Mo(p, nα)91mNb, (p, α)92mNb, (p, 2n)94Tc/94mTc, (p, n)95mTc/95mTc, E=10.57, 12.01, 13.02, 4.03, 15.07, 16.03, 17.99, 19.03 MeV; 96Mo(p, nα)92mNb, (p, 2n)95Tc/95mTc, (p, n)96Tc/96mTc, E=8.04, 10.06, 11.07, 11.55, 12.07, 12.55, 13.06, 14.05, 15.05, 16.05, 17.05, 18.05, 19.06 MeV; 97Mo(p, 2n)96Tc/96mTc, (p, n)97mTc, E=9.01, 10.05, 10.98, 11.98, 13.02, 14.02, 15.04 MeV; 98Mo(p, α)95Nb/95mNb, (p, 2n)97mTc, (p, γ)99mTc, E=10.06, 11.06, 12.05, 13.06, 14.05, 15.05, 16.06, 17.06, 18.02, 19.05 MeV; 100Mo(p, nα)96Nb, (p, α)97Nb/97mNb, (p, np)99Mo, (p, 2n)99mTc, (p, γ)101Tc, E=8.01, 9.01, 10.07, 11.01, 12.02, 13.03, 14.03, 15.07, 16.04, 17.03, 18.07, 19.07 MeV; measured Eγ, Iγ, σ(E) by γ-activation method. Comparison with HF calculations using TALYS-1.8 code, and with previous experimental results. Measurement made at the Nuclear Science Laboratory at the University of Notre Dame.
doi: 10.1103/PhysRevC.100.034614
2018LA06 Astrophys.J. 859, 62 (2018) R.Lau, M.Beard, S.S.Gupta, H.Schatz, A.V.Afanasjev, E.F.Brown, A.Deibel, L.R.Gasques, G.W.Hitt, W.R.Hix, L.Keek, P.Moller, P.S.Shternin, A.W.Steiner, M.Wiescher, Y.Xu Nuclear Reactions in the Crusts of Accreting Neutron Stars
doi: 10.3847/1538-4357/aabfe0
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
2017BE18 Phys.Rev.Lett. 119, 1127501 (2017) Enhancement of the Triple Alpha Rate in a Hot Dense Medium NUCLEAR REACTIONS 4He(α, X)8Be, 8Be(α, X)12C, E<30 MeV; calculated 3α σ, reaction rates; deduced that in hot and dense astrophysical environment the rate of the triple-alpha reaction can increase greatly over the value appropriate for helium burning stars owing to hadronically induced deexcitation of the Hoyle state.
doi: 10.1103/PhysRevLett.119.112701
2017FA10 Phys.Rev. C 96, 045804 (2017) X.Fang, W.P.Tan, M.Beard, R.J.deBoer, G.Gilardy, H.Jung, Q.Liu, S.Lyons, D.Robertson, K.Setoodehnia, C.Seymour, E.Stech, B.Vande Kolk, M.Wiescher, R.T.deSouza, S.Hudan, V.Singh, X.D.Tang, E.Uberseder Experimental measurement of 12C + 16O fusion at stellar energies NUCLEAR REACTIONS 12C(16O, p), (16O, n), (16O, α), E=8.5-11.7 MeV in steps of 100 or 200 keV; measured Eγ, Iγ, Ep, Ip, pγ-coin, charged particles, partial and total fusion σ(E) at the (ANA) accelerator laboratory (NSL) of University of Notre Dame; deduced S factors, astrophysical reaction rates, uncertainty range of the reaction rate within the temperature range of late stellar burning environments. Results analyzed using Statistical model calculations with SAPPHIRE code. 27Al, 24Mg, 27Si; deduced levels, relative γ strengths of the observed transitions with respect to the strength of the ground state transition of the first excited states.
doi: 10.1103/PhysRevC.96.045804
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
2017OZ01 Phys.Rev. C 96, 045805 (2017) N.Ozkan, R.T.Guray, C.Yalcin, W.P.Tan, A.Aprahamian, M.Beard, R.J.deBoer, S.Almaraz-Calderon, S.Falahat, J.Gorres, Q.Li, A.Sauerwein, K.Sonnabend, M.Wiescher, Zs.Fulop, Gy.Gyurky, E.Somorjai, J.Greene Proton capture reaction cross section measurements on 162Er as a probe of statistical model calculations NUCLEAR REACTIONS 162Er(p, γ)163Tm, 162Er(p, n)162Tm, E=4.0-9.0 MeV in steps of 0.5 MeV; measured reaction products, Eγ, Iγ, σ(E) by activation method using the FN tandem accelerator at the University of Notre Dame; deduced S factors. Comparison with Hauser Feshbach (HF) statistical model calculations using NON-SMOKER and TALYS codes.
doi: 10.1103/PhysRevC.96.045805
2017SI11 J.Phys.(London) G44, 064006 (2017) A.Simon, M.Beard, B.S.Meyer, B.Roach Impact of the α optical model potential on the γ-process nucleosynthesis NUCLEAR REACTIONS 156,158,160Dy, 152,154Er, 168Yb(α, γ), E<5 GK; 106Cd, 112Sn, 144Sm, 151Eu, 168Yb, 197Au(α, n), E(cm)<24 MeV; calculated σ, astrophysical reaction rates. NON-SMOKER, TALYS nuclear model codes, comparison with available data.
doi: 10.1088/1361-6471/aa6bb4
2016MA66 Phys.Rev. C 94, 044304 (2016) A.Makinaga, R.Massarczyk, M.Beard, R.Schwengner, H.Otsu, T.Al-Abdullah, M.Anders, D.Bemmerer, R.Hannaske, R.John, A.R.Junghans, S.E.Muller, M.Roder, K.Schmidt, A.Wagner Dipole strength in 80Se for s process and nuclear transmutation of 79Se NUCLEAR REACTIONS 80Se(γ, γ'), E<11.5 MeV bremsstrahlung beam from γELBE facility at Dresden; measured Eγ, Iγ, energy-integrated σ, γ(θ). 80Se; deduced levels, J, photoabsorption σ(E) and compared to (γ, n) data. 79Se(n, γ), E=1 keV to 9 MeV; calculated σ(E), Maxwellian-averaged cross sections (MACs), reaction rates as a function of temperature from 0.0001 to 10 GK using TALYS code with various input strength functions. 80Se(γ, n), T9=2-5.5; calculated reaction rates using TALYS code with various input strength functions. Comparison with σ data in KADoNiS database.
doi: 10.1103/PhysRevC.94.044304
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
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
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
2014BE34 Phys.Rev. C 90, 034619 (2014) M.Beard, E.Uberseder, R.Crowter, M.Wiescher Comparison of statistical model calculations for stable isotope neutron capture NUCLEAR REACTIONS 36S, 37Cl, 38,40Ar, 39,40,41K, 40,42,43,44,46,48Ca, 45Sc, 46,47,48,49,50Ti, 196,198,199,200,201,202,204Hg, 203,205Tl, 204,206,207,208Pb(n, γ), E at kT=30 keV; calculated Maxwellian-averaged neutron capture cross sections (MACS) at 30 keV for 340 stable isotopes with N=20-127, Z=16-82 using statistical Hauser-Feshbach model codes TALYS and NON-SMOKER, and two new HF codes, CIGAR and SAPPHIRE. Comparison with data in KAdoNiS database, and other available experimental data. Note that only 32 isotopes out of a total of 340 isotopes studied are listed here.
doi: 10.1103/PhysRevC.90.034619
2014MA81 Phys.Rev. C 90, 044301 (2014) A.Makinaga, R.Massarczyk, R.Schwengner, M.Beard, F.Donau, M.Anders, D.Bemmerer, R.Beyer, R.Hannaske, A.R.Junghans, M.Kempe, T.Kogler, M.Roder, K.Schmidt, A.Wagner Dipole strength of 181Ta for the evaluation of the 180Ta stellar neutron capture rate NUCLEAR REACTIONS 181Ta(γ, γ'), E<10 MeV; measured Eγ, Iγ, γγ-coin, photoabsorption σ(E) using the bremsstrahlung facility γ-ELBE at the electron accelerator of Dresden-Rossendorf (HZDR) facility; deduced mean branching ratios and uncertainty range of ground-state transitions from γ-ray cascades, dipole-strength distribution. Comparison with 181Ta(γ, n) experimental data, and QRPA calculations. NUCLEAR REACTIONS 180,180m,181Ta(n, γ), E<15 MeV; calculated σ(E), Maxwellian-averaged cross sections (MACS). 181Ta(γ, n) at T=2-5.5 GK; 180mTa(n, γ) at T=0.1-1 GK; calculated stellar reaction rates. Calculations using the code TALYS with various models for the input strength function. Comparison with data in KADoNiS database.
doi: 10.1103/PhysRevC.90.044301
2014SC01 Nature(London) 505, 62 (2014) H.Schatz, S.Gupta, P.Moller, M.Beard, E.F.Brown, A.T.Deibel, L.R.Gasques, W.R.Hix, L.Keek, R.Lau, A.W.Steiner, M.Wiescher Strong neutrino cooling by cycles of electron capture and β- decay in neutron star crusts NUCLEAR STRUCTURE 105Zr; calculated single-particle energy levels, J, π, hexadecapole deformation parameters.
doi: 10.1038/nature12757
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
2013BO30 Phys.Rev. C 88, 065802 (2013) M.Bowers, Y.Kashiv, W.Bauder, M.Beard, P.Collon, W.Lu, K.Ostdiek, D.Robertson Measurement of the 33S(α, p)36Cl cross section: Implications for production of 36Cl in the early Solar System NUCLEAR REACTIONS 33S(α, p)36Cl, E=0.70-2.42 MeV/nucleon; measured reaction products, σ(E), 36Cl/Cl ratio using accelerator mass spectrometry (AMS) technique from 36Cl ions extracted from the (α, p) reaction at Notre Dame accelerator facility. Comparison of measured σ with theoretical cross sections used in the early solar system (ESS) irradiation models, and calculated values from NON-SMOKER and TALYS Hauser-Feshbach codes. Relevance to production of τ<100 My in the early Solar System.
doi: 10.1103/PhysRevC.88.065802
2013CH39 Bull.Rus.Acad.Sci.Phys. 77, 890 (2013); Izv.Akad.Nauk RAS, Ser.Fiz 77, 978 (2013) A.I.Chugunov, A.V.Afanasjev, M.Beard, M.Wiescher, D.G.Yakovlev Simple approximation of cross sections for nuclear reactions involving Z = 3-12, 14 nuclei NUCLEAR REACTIONS Be, B, C, N, O, F, Ne, Na, Mg, Si(Be, X), B, C, N, O, F, Ne, Na, Mg, Si(B, X), C, N, O, F, Ne, Na, Mg, Si(C, X), N, O, F, Ne, Na, Mg, Si(N, X), O, F, Ne, Na, Mg, Si(O, X), F, Ne, Na, Mg, Si(F, X), Ne, Na, Mg, Si(Ne, X), Na, Mg, Si(Na, X), Mg, Si(Mg, X), Si(Si, X), E not given; San Paulo potential, below the Coulomb barrier energies.
doi: 10.3103/S1062873813070083
2012AF01 Phys.Rev. C 85, 054615 (2012) A.V.Afanasjev, M.Beard, A.I.Chugunov, M.Wiescher, D.G.Yakovlev Large collection of astrophysical S factors and their compact representation NUCLEAR REACTIONS Be(Be, X), (B, X), (C, X), (N, X), (O, X), (F, X), (Ne, X), (Na, X), (Mg, X), (Si, X), B(B, X), (C, X), (N, X), (O, X), (F, X), (Ne, X), (Na, X), (Mg, X), (Si, X), C(C, X), (N, X), (F, X), (O, X), (Ne, X), (Na, X), (Mg, X), (Si, X), N(N, X), (O, X), (F, X), (Ne, X), (Na, X), (Mg, X), (Si, X), O(O, X), (F, X), (Ne, X), (Na, X), (Mg, X), (Si, X), F(F, X), (Ne, X), (Na, X), (Mg, X), (Si, X), Ne(Ne, X), (Na, X), (Mg, X), (Si, X), Na(Na, X), (Mg, X), (Si, X), Mg(Mg, X), (Si, X), Si(Si, X), E<39.8 MeV; calculated astrophysical S factors as function of incident energy for A=8-14 Be, A=9-21 for B, A=10-24 for C, A=11-27 for N, A=12-28 for O, A=17-29 for F, A=18-40 for Ne, A=19-43 for Na, A=20-46 for Mg and A=24-52 for Si for a database of 5000 nonresonant fusion reactions. Sao Paulo method and the barrier penetration model. Comparison with experimental data.
doi: 10.1103/PhysRevC.85.054615
2012AL23 Phys.Rev. C 86, 065805 (2012); Erratum Phys.Rev. C 88, 059902 (2013) S.Almaraz-Calderon, W.P.Tan, A.Aprahamian, M.Beard, G.P.A.Berg, B.Bucher, M.Couder, J.Gorres, S.O'Brien, D.Patel, A.Roberts, K.Sault, M.Wiescher, C.R.Brune, T.N.Massey, K.Fujita, K.Hatanaka, D.Ishiwaka, H.Matsubara, H.Okamura, H.J.Ong, Y.Sakemi, Y.Shimizu, T.Suzuki, Y.Tameshige, A.Tamii, J.Zenihiro, T.Kubo, Y.Namiki, Y.Ohkuma, Y.Shimbara, S.Suzuki, R.Watanabe, R.Yamada, T.Adachi, Y.Fujita, H.Fujita, M.Dozono, T.Wakasa Level structure of 30S and its importance in the 26Si(α, p)29P and 29P(p, γ)30S reaction rates NUCLEAR REACTIONS 32S(p, t), E=98.7 MeV; measured triton spectra at two angles using Grand Raiden (GR) magnetic spectrometer at RCNP facility. 28Si(3He, n), E=15 MeV; measured neutron (TOF) spectra, charged-particle spectra, (charged-particle)n-coin, angular distributions using LESA array and scintillation detectors at Notre Dame NSL facility. 30S; deduced levels, proton- and α- unbound levels, J, π, proton branching ratios, partial proton widths. DWBA analysis. Comparison with several previous experimental studies. 29P(p, γ)30S, 26Si(α, p)29P, T9=0.01-10 GK; deduced astrophysical reaction rates. Comparison with previous theoretical calculations. Contribution of resonances to total reaction rates.
doi: 10.1103/PhysRevC.86.065805
2012BE22 Phys.Rev. C 85, 065808 (2012) M.Beard, S.Frauendorf, B.Kampfer, R.Schwengner, M.Wiescher Photonuclear and radiative-capture reaction rates for nuclear astrophysics and transmutation: 92-100Mo, 88Sr, 90Zr, and 139La NUCLEAR REACTIONS 92,94,96,98,100Mo, 88Sr, 90Zr, 139La(γ, n), (γ, p), (γ, α), (n, γ), (p, γ), (α, γ), E<16 MeV; calculated γ strength functions, σ(E), stellar reaction rates. Statistical model code TALYS, single Lorentzian (SLO), double Lorentzian (DLO), and generalized Lorentzian (GLO) calculations. Enhancement of radiative capture reaction cross sections by pygmy resonances in 88Sr, 90Zr and 139La. Comparison with experimental data.
doi: 10.1103/PhysRevC.85.065808
2012SH23 Phys.Rev. C 86, 015808 (2012) P.S.Shternin, M.Beard, M.Wiescher, D.G.Yakovlev Neutron degeneracy and plasma physics effects on radiative neutron captures in neutron star crust NUCLEAR REACTIONS 38Mg(n, γ), E<1.5 MeV; 39Mg(n, γ), E<0.1 MeV; 46Mg(n, γ), E<6 MeV; 62Ca(n, γ), E<10 MeV; calculated astrophysical σ(E), Rn ratios (Fermi-Dirac to Maxwell-Boltzmann cross sections), forward and inverse reaction rates in dense stellar medium with consideration of effects of plasma physics and neutron degeneracy in neutron star crust.
doi: 10.1103/PhysRevC.86.015808
2011ES06 Phys.Rev.Lett. 107, 172503 (2011) A.Estrade, M.Matos, H.Schatz, A.M.Amthor, D.Bazin, M.Beard, A.Becerril, E.F.Brown, R.Cyburt, T.Elliot, A.Gade, D.Galaviz, S.George, S.S.Gupta, W.R.Hix, R.Lau, G.Lorusso, P.Moller, J.Pereira, M.Portillo, A.M.Rogers, D.Shapira, E.Smith, A.Stolz, M.Wallace, M.Wiescher Time-of-Flight Mass Measurements for Nuclear Processes in Neutron Star Crusts ATOMIC MASSES 53,54,55Sc, 57Ti, 60,61V, 63Cr, 65,66Mn, 67,68Fe, 68,69,70,71Co, 74Ni; measured time of flight; deduced masses. Stellar nucleosynthesis implications.
doi: 10.1103/PhysRevLett.107.172503
2011MA46 Phys.Rev. C 84, 025801 (2011) A.Matic, A.M.van den Berg, M.N.Harakeh, H.J.Wortche, M.Beard, G.P.A.Berg, J.Gorres, P.LeBlanc, S.O'Brien, M.Wiescher, K.Fujita, K.Hatanaka, Y.Sakemi, Y.Shimizu, Y.Tameshige, A.Tamii, M.Yosoi, T.Adachi, Y.Fujita, Y.Shimbara, H.Fujita, T.Wakasa, J.P.Greene, R.Crowter, H.Schatz High-precision 28Si( p, t)26Si reaction to determine 22Mg(α, p)25Al reaction rates NUCLEAR REACTIONS 28Si(p, t)26Si, E=98.7 MeV; measured E(t), I(t), angular distributions using Grand Raiden spectrometer at RCNP facility. 26Si; deduced levels above the α-emission threshold, J, π, α-resonances, spectroscopic factors. 22Mg(α, p)25Al; deduced stellar reaction rates using the narrow resonance formalism. Comparison with theoretical calculations.
doi: 10.1103/PhysRevC.84.025801
2010BE12 At.Data Nucl.Data Tables 96, 541 (2010) M.Beard, A.V.Afanasjev, L.C.Chamon, L.R.Gasques, M.Wiescher, D.G.Yakovlev Astrophysical S factors for fusion reactions involving C, O, Ne, and Mg isotopes NUCLEAR REACTIONS C(C, X), (O, X), (Ne, X), (Mg, X), O(O, X), (Ne, X), (Mg, X), Ne(Ne, X), (Mg, X), Mg(Mg, X), E≈18-30 MeV MeV; calculated S-factors; deduced reaction rates calculation procedure.
doi: 10.1016/j.adt.2010.02.005
2010LE02 Phys.Rev. C 81, 015802 (2010) H.Y.Lee, J.P.Greene, C.L.Jiang, R.C.Pardo, K.E.Rehm, J.P.Schiffer, A.H.Wuosmaa, N.J.Goodman, J.C.Lighthall, S.T.Marley, K.Otsuki, N.Patel, M.Beard, M.Notani, X.D.Tang Experimental study of the 11, 12B(n, γ) reactions and their influence on r-process nucleosynthesis of light elements NUCLEAR REACTIONS 2H(11B, p), E=81 MeV; 2H(12B, p), E=75 MeV; measured proton and 11,12,13B particle spectra, σ(θ). 12,13B; deduced levels, J, π, l-transfers. Comparison with DWBA calculations. 11B, 12B(n, γ); deduced reaction rates of astrophysical relevance, and abundances of 11B and 12B in r process.
doi: 10.1103/PhysRevC.81.015802
2010LE21 Phys.Rev. C 82, 055804 (2010), Erratum Phys.Rev. C 84, 019902 (2011) P.J.LeBlanc, G.Imbriani, J.Gorres, M.Junker, R.Azuma, M.Beard, D.Bemmerer, A.Best, C.Broggini, A.Caciolli, P.Corvisiero, H.Costantini, M.Couder, R.deBoer, Z.Elekes, S.Falahat, A.Formicola, Zs.Fulop, G.Gervino, A.Guglielmetti, C.Gustavino, Gy.Gyurky, F.Kappeler, A.Kontos, R.Kuntz, H.Leiste, A.Lemut Q.Li, B.Limata, M.Marta, C.Mazzocchi, R.Menegazzo, S.O'Brien, A.Palumbo, P.Prati, V.Roca, C.Rolfs, C.Rossi Alvarez, E.Somorjai, E.Stech, O.Straniero, F.Strieder, W.Tan, F.Terrasi, H.P.Trautvetter, E.Uberseder, M.Wiescher Constraining the S factor of 15N(p, γ)16O at astrophysical energies NUCLEAR REACTIONS 15N(p, γ), E=130-1800 keV; measured Ep, Ip, Eγ, Iγ, σ(E), σ(θ); deduced resonances, branching ratios, astrophysical S factors and reaction rates. Multilevel R-matrix analysis. Implications for the first and second cycles of the CNO cycles.
doi: 10.1103/PhysRevC.82.055804
2010YA19 Phys.Rev. C 82, 044609 (2010) D.G.Yakovlev, M.Beard, L.R.Gasques, M.Wiescher Simple analytic model for astrophysical S factors NUCLEAR REACTIONS 46Mg(46Mg, X), E=29.9 MeV; 12C(12C, X), E=1-12 MeV; C(C, X), (O, X), E=2-17.9 MeV; C(Ne, X), (Mg, X), O(O, X), E=2-19.9 MeV; O(Ne, X), (Mg, X), Ne(Ne, X), E=2-21.9 MeV; Ne(Mg, X), E=2-24.9 MeV; Mg(Mg, X), E=2-29.9 MeV; calculated astrophysical S factors using a simple model with physically meaningful parameters. Comparison with experimental data.
doi: 10.1103/PhysRevC.82.044609
2009TA09 Phys.Rev. C 79, 055805 (2009) W.P.Tan, J.Gorres, M.Beard, M.Couder, A.Couture, S.Falahat, J.L.Fisker, L.Lamm, P.J.LeBlanc, H.Y.Lee, S.O'Brien, A.Palumbo, E.Stech, E.Strandberg, M.Wiescher Measurement of the decay branching ratios of the α-unbound states in 19Ne and the 15O(α, γ) reaction rate NUCLEAR REACTIONS 19F(3He, t), E=24 MeV; measured triton spectra, tα-coin, α(θ), α-decay branching ratios. 19Ne; deduced levels, J, π, α-unbound resonances. 15O(α, γ); deduced reaction rates versus temperature.
doi: 10.1103/PhysRevC.79.055805
2008CO03 Phys.Rev. C 77, 015802 (2008) A.Couture, M.Beard, M.Couder, J.Gorres, L.Lamm, P.J.LeBlanc, H.Y.Lee, S.O'Brien, A.Palumbo, E.Stech, E.Strandberg, W.Tan, E.Uberseder, C.Ugalde, M.Wiescher, R.Azuma Measurement of the 19F(p, γ)20Ne reaction and interference terms from Ec.m.=200-760 keV NUCLEAR REACTIONS 19F(p, γ), E(cm)=200-700 keV; measured Eγ, Iγ, resonance parameters, interference signs. 20Ne, 16O, 19F; deduced levels, J, π.
doi: 10.1103/PhysRevC.77.015802
2008ST11 Phys.Rev. C 77, 055801 (2008) E.Strandberg, M.Beard, M.Couder, A.Couture, S.Falahat, J.Gorres, P.J.LeBlanc, H.Y.Lee, S.O'Brien, A.Palumbo, E.Stech, W.P.Tan, C.Ugalde, M.Wiescher, H.Costantini, K.Scheller, M.Pignatari, R.Azuma, L.Buchmann 24Mg(α, γ)28Si resonance parameters at low alpha-particle energies NUCLEAR REACTIONS 24Mg(α, γ), E=1.0-1.5 MeV; measured Eγ, Iγ, γγ-coin, branching ratios, resonance strengths. 28Si; deduced levels, J, π, reaction rates. 13C, 17O, 21,22Ne, 25Mg(α, n); 16O, 20Ne(α, γ); 23Na, 24Mg, 27Al(p, γ); 23Na, 24Mg, 27Al, 28Si(n, γ); 25Al(γ, p); 27Al(p, α); analyzed reaction rates.
doi: 10.1103/PhysRevC.77.055801
2007GA50 Phys.Rev. C 76, 045802 (2007) L.R.Gasques, A.V.Afanasjev, M.Beard, J.Lubian, T.Neff, M.Wiescher, D.G.Yakovlev Sao Paulo potential as a tool for calculating S factors of fusion reactions in dense stellar matter NUCLEAR REACTIONS 16O(16O, X), E(cm)=0-20 MeV; 20O(20O, X), E=0-28 MeV; 20O(26Ne, X), E=0-20 MeV; 20O(32Mg, X), E=0-24 MeV; 26Ne(26Ne, X), E=0-24 MeV; 26Ne(32Mg, X), E=0-28 MeV; 32Mg(32Mg, X), E=0-28 MeV; 22O(22O, X), E=0-20 MeV; 24O(24O, X), E(cm)=0-20 MeV; calculated astrophysical S-factors for fusion reactions. Sao Paulo potential.
doi: 10.1103/PhysRevC.76.045802
2006YA14 Phys.Rev. C 74, 035803 (2006) D.G.Yakovlev, L.R.Gasques, A.V.Afanasjev, M.Beard, M.Wiescher Fusion reactions in multicomponent dense matter NUCLEAR REACTIONS 12C, 16O(12C, X), (16O, X), E(cm)=0-20 MeV; calculated astrophysical S-factors, fusion rates in dense matter.
doi: 10.1103/PhysRevC.74.035803
2005GA33 Phys.Rev. C 72, 025806 (2005) L.R.Gasques, A.V.Afanasjev, E.F.Aguilera, M.Beard, L.C.Chamon, P.Ring, M.Wiescher, D.G.Yakovlev Nuclear fusion in dense matter: Reaction rate and carbon burning NUCLEAR REACTIONS 12C(12C, 12C), E(cm)=6-10 MeV; calculated σ(θ). 12C(12C, X), E(cm) ≈ 0-10 MeV; calculated astrophysical S-factor, fusion rate in dense matter.
doi: 10.1103/PhysRevC.72.025806
2005GA38 Nucl.Phys. A758, 134c (2005) L.R.Gasques, A.V.Afanasjev, M.Beard, L.C.Chamon, P.Ring, M.Wiescher Pycnonuclear reaction rates between neutron-rich nuclei NUCLEAR REACTIONS 22,24O(22O, X), 24O, 34Ne, 42Mg(24O, X), 34Ne, 42Mg(34Ne, X), 42Mg(42Mg, X), E(cm) ≈ 0-18 MeV; calculated S-factors, pycnonuclear reactions rates.
doi: 10.1016/j.nuclphysa.2005.05.027
2005GA48 J.Phys.(London) G31, S1859 (2005) L.R.Gasques, M.Beard, L.C.Chamon, M.Wiescher Pycnonuclear 12C + 12C reaction at zero temperature NUCLEAR REACTIONS 12C(12C, X), E ≈ 0-10 MeV; calculated astrophysical S-factor, pycnonuclear reaction rate.
doi: 10.1088/0954-3899/31/10/088
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