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Search: Author = R.Lewis

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2023CR03      Nucl.Instrum.Methods Phys.Res. A1055, 168525 (2023)

B.P.Crider, C.J.Prokop, S.N.Liddick, H.M.Albers, M.Alshudifat, A.D.Ayangeakaa, M.P.Carpenter, J.J.Carroll, J.Chen, C.J.Chiara, A.C.Dombos, S.Go, R.Grzywacz, J.Harker, R.V.F.Janssens, N.Larson, T.Lauritsen, R.Lewis, S.J.Quinn, F.Recchia, D.Seweryniak, A.Spyrou, S.Suchyta, W.B.Walters, S.Zhu

New method for level-lifetime measurements with thick scintillators

NUCLEAR REACTIONS 9Be(76Ge, X)68Ni/68Zn/69Ni/70Ni, E=140 MeV/nucleon; measured reaction products, Eγ, Iγ, Eβ, Iβ, βγ-coin.; deduced γ-ray energies, level T1/2. Comparison with available data. The National Superconducting Cyclotron Laboratory (NSCL), the coupled cyclotron facility.

doi: 10.1016/j.nima.2023.168525
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2023LE04      Eur.Phys.J. A 59, 42 (2023)

R.Lewis, A.Couture, S.N.Liddick, A.Spyrou, D.L.Bleuel, L.Crespo Campo, B.P.Crider, A.C.Dombos, M.Guttormsen, T.Kawano, A.C.Larsen, A.M.Lewis, S.Mosby, G.Perdikakis, C.J.Prokop, S.J.Quinn, T.Renstrom, S.Siem

Statistical (n, γ) cross section model comparison for short-lived nuclei

NUCLEAR REACTIONS 73Zn(n, γ), E<1 MeV; calculated σ using TALYS, EMPIRE, and CoH, level densities, γ-ray strength function. Comparison with experimental data.

doi: 10.1140/epja/s10050-023-00920-0
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2023LU07      Phys.Rev. C 108, 014329 (2023)

R.S.Lubna, S.N.Liddick, T.H.Ogunbeku, A.Chester, J.M.Allmond, S.Bhattacharya, C.M.Campbell, M.P.Carpenter, K.L.Childers, P.Chowdhury, J.Christie, B.R.Clark, R.M.Clark, I.Cox, H.L.Crawford, B.P.Crider, A.A.Doetsch, P.Fallon, A.Frotscher, T.Gaballah, T.J.Gray, R.Grzywacz, J.T.Harke, A.C.Hartley, R.Jain, T.T.King, N.Kitamura, K.Kolos, F.G.Kondev, E.Lamere, R.Lewis, B.Longfellow, S.Lyons, S.Luitel, M.Madurga, R.Mahajan, M.J.Mogannam, C.Morse, S.K.Neupane, W.-J.Ong, D.Perez-Loureiro, C.Porzio, C.J.Prokop, A.L.Richard, E.K.Ronning, E.Rubino, K.Rykaczewski, D.Seweryniak, K.Siegl, U.Silwal, M.Singh, D.P.Siwakoti, D.C.Smith, M.K.Smith, S.L.Tabor, T.L.Tang, V.Tripathi, A.Volya, T.Wheeler, Y.Xiao, Z.Xu

β decay of 36Mg and 36Al: Identification of a β-decaying isomer in 36Al

RADIOACTIVITY 36Mg, 36Al(β-)[from 9Be(48Ca, X), E=140 MeV/nucleon for experiment at NSCL and 9Be(48Ca, X), E=172.3 MeV/nucleon for experiment at FRIB]; 36Al, 36mAl(β-)[from 36Mg(β-); measured Eγ, Iγ; deduced T1/2. 36Al; deduced levels, J, π, newly-observed β-decaying isomer, T1/2 of the isomer. 36Si; deduced levels, J, π. Comparison to shell model calculations performed with the FSU interaction using code CoSMo. For experiment at NSCL - CeBr3 based implantation detector with position-sensitive photomultiplier tube was surrounded by 16 segmented germanium detectors (SeGa) and 15 LaBr3 detectors. For experiment at FRIB - YSO scintillator based implantation detector segmented into 48x48 pixels was surrounded by 11 HPGe clover detectors and LaBr3 detectors from one side and the neutron detector array VANDLE from the other side.

doi: 10.1103/PhysRevC.108.014329
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2023OG04      Phys.Rev. C 108, 034304 (2023)

T.H.Ogunbeku, B.P.Crider, S.N.Liddick, B.A.Brown, A.Chester, K.L.Childers, P.Chowdhury, E.Lamere, R.Lewis, B.Longfellow, R.S.Lubna, S.Lyons, S.K.Neupane, D.Perez-Loureiro, C.J.Prokop, A.L.Richard, U.Silwal, D.P.Siwakoti, D.C.Smith, M.K.Smith, Y.Xiao

First half-life measurement of a low-lying isomer in 37Si

doi: 10.1103/PhysRevC.108.034304
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2022NA07      Nucl.Phys. A1018, 122359 (2022)

F.Naqvi, S.Karampagia, A.Spyrou, S.N.Liddick, A.C.Dombos, D.L.Bleuel, B.A.Brown, L.Crespo Campo, A.Couture, B.Crider, T.Ginter, M.Guttormsen, A.C.Larsen, R.Lewis, P.Moller, S.Mosby, G.Perdikakis, C.Prokop, T.Renstrom, S.Siem

Total absorption spectroscopy measurement on neutron-rich 74, 75Cu isotopes

RADIOACTIVITY 74,75Cu(β-) [from 9Be(86Kr, X), E=140 MeV/nucleon]; measured decay products, Eγ, Iγ; deduced T1/2, cumulative β-decay intensities, B(GT). Comparison with available data.

doi: 10.1016/j.nuclphysa.2021.122359
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2022SH22      Nucl.Instrum.Methods Phys.Res. A1035, 166789 (2022)

O.A.Shehu, B.P.Crider, T.Ginter, C.R.Hoffman, T.H.Ogunbeku, Y.Xiao, K.L.Childers, P.Chowdhury, C.Fry, E.Lamere, R.Lewis, S.N.Liddick, B.Longfellow, S.Lyons, S.K.Neupane, D.Perez-Loureiro, C.J.Prokop, A.L.Richard, U.Silwal, D.P.Siwakoti, D.C.Smith, M.K.Smith

Experimental study of the 34mCl beam production at intermediate energies

RADIOACTIVITY 34Cl(IT), (EC) [from 9Be(36Ar, X), E=150 MeV/nucleon]; measured decay products, Eγ, Iγ; deduced γ-ray energies, the beam production rates and isomeric state composition. The National Superconducting Cyclotron Laboratory (NSCL).

doi: 10.1016/j.nima.2022.166789
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2022WA34      Phys.Rev. C 106, 044317 (2022)

S.Waniganeththi, D.E.M.Hoff, A.M.Rogers, C.J.Lister, P.C.Bender, K.Brandenburg, K.Childers, J.A.Clark, A.C.Dombos, E.R.Doucet, S.Jin, R.Lewis, S.N.Liddick, Z.Meisel, C.Morse, H.Schatz, K.Schmidt, D.Soltesz, S.K.Subedi

Establishing the ground-state spin of 71Kr

RADIOACTIVITY 71Kr(EC), (β+), (β+p) [from 9Be(92Mo, X), E=140 MeV/nucleon, followed by separation of fragments using A1900 fragment separator and a Radio Frequency Fragment Separator (RFFS) at the NSCL-MSU facility]; measured particle identification plot of implanted ions, Eγ, Iγ, E(p), I(p), (implants)β-coin, (implants)(β-delayed protons)-coin, (implants)γγ-coin, (implants)βγ-coin, T1/2 of decay of 71Kr; deduced absolute number of βγ-coin events, β events, absolute γ intensities, and intensities of β-delayed protons, logft for ground-state to ground-state superallowed β transition using SeGA array with 16 HPGe detectors for γ detection, and double-sided silicon-strip detector (DSSSDs) for particle detection. 71Kr; deduced Jπ and T1/2 of the ground state, decay branching ratios. 70Br; deduced T1/2 of the 0+ g.s. and 9+ isomer. 71Br, 70Se; deduced levels, J, π, β feedings, logft, I(p) feedings. Discussed structure of 71Kr and 71Br mirror nuclei. Comparison with previous experimental results.

doi: 10.1103/PhysRevC.106.044317
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2021PE08      Phys.Rev. C 103, 055808 (2021)

C.F.Persch, P.A.DeYoung, S.Lyons, A.Spyrou, S.N.Liddick, F.Naqvi, B.P.Crider, A.C.Dombos, J.Gombas, D.L.Bleuel, B.A.Brown, A.Couture, L.Crespo Campo, J.Engel, M.Guttormsen, A.C.Larsen, R.Lewis, S.Karampagia, S.Mosby, E.M.Ney, A.Palmisano, G.Perdikakis, C.J.Prokop, T.Renstrom, S.Siem, M.K.Smith, S.J.Quinn

β-decay feeding intensity distributions of 71, 73Ni

RADIOACTIVITY 71,73Ni(β-)[from 9Be(86Kr, X), E=140 MeV/nucleon, followed by separation of fragments using A1900 fragment separator at NSCL-MSU facility]; measured implantation events and β particles using position-sensitive, double-sided, silicon-strip detector (DSSD), and two silicon PIN detectors for TOF and energy loss, Eγ, Iγ, half-lives of decays of 71,73Ni using a total absorption summing NaI(Tl) detector (SuN) surrounding the DSSD; deduced multiplicity spectra, Iβ(E) feedings, B(GT). GEANT4 and DICEBOX analysis of total absorption spectrum (TAS). Comparison with QRPA, and shell-model calculations, the latter using NuShellX@MSU code with JJ44B and JUN45 interaction Hamiltonians. Relevance to improvement in the nuclear input for r-process calculations.

NUCLEAR REACTIONS 9Be(86Kr, X)71Ni/73Ni/71Cu/73Cu/, E=140 MeV/nucleon; measured yields of reaction products using A1900 fragment separator and two silicon PIN detectors for TOF and energy loss at NSCL-MSU facility.

doi: 10.1103/PhysRevC.103.055808
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2020HO06      Nature(London) 580, 52 (2020)

D.E.M.Hoff, A.M.Rogers, S.M.Wang, P.C.Bender, K.Brandenburg, K.Childers, J.A.Clark, A.C.Dombos, E.R.Doucet, S.Jin, R.Lewis, S.N.Liddick, C.J.Lister, Z.Meisel, C.Morse, W.Nazarewicz, H.Schatz, K.Schmidt, D.Soltesz, S.K.Subedi, S.Waniganeththi

Mirror-symmetry violation in bound nuclear ground states

RADIOACTIVITY 73Sr(β+p), (β+), (EC) [from Be(92Mo, X), E=140 MeV/nucleon]; measured decay products, Eβ, Iβ, Ep, Ip; deduced T1/2, γ-ray energies, level scheme, J, π, branching ratios, isobaric-analogue state (IAS), log ft. Comparison with calculations, available data.

doi: 10.1038/s41586-020-2123-1
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2020HO17      Phys.Rev. C 102, 045810 (2020)

D.E.M.Hoff, A.M.Rogers, Z.Meisel, P.C.Bender, K.Brandenburg, K.Childers, J.A.Clark, A.C.Dombos, E.R.Doucet, S.Jin, R.Lewis, S.N.Liddick, C.J.Lister, C.Morse, H.Schatz, K.Schmidt, D.Soltesz, S.K.Subedi, S.M.Wang, S.Waniganeththi

Influence of 73Rb on the ashes of accreting neutron stars

RADIOACTIVITY 73Sr(β+), (β+p)[from 9Be(92Mo, X), E=140 MeV/nucleon, followed by the separation and purification of 73Sr beam by A1900 and radiofrequency fragment separators at NSCL-MSU, and implanted in double-sided silicon strip detector]; measured Ep, Ip. 73Rb; deduced energy of the isobaric analogue state (IAS), J, π, isospin, S(p), β++ϵ feedings and logft for transitions to the 3/2- g.s. and the IAS, influence of 73Rb S(p) on x-ray bursts, and impact on the products of the rp process. Bayesian analysis of beta-delayed proton spectrum.

ATOMIC MASSES 73Rb, 73Sr; analyzed mass excesses by IMME analysis for A=73 isobars of 73Sr, 73Rb, 73Kr and 73Br; deduced mass excesses for 73Rb and 73Sr, and S(p) for 73Rb. Comparison with data in AME2016.

doi: 10.1103/PhysRevC.102.045810
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2020ON01      Phys.Rev.Lett. 125, 262701 (2020)

W.-J.Ong, E.F.Brown, J.Browne, S.Ahn, K.Childers, B.P.Crider, A.C.Dombos, S.S.Gupta, G.W.Hitt, C.Langer, R.Lewis, S.N.Liddick, S.Lyons, Z.Meisel, P.Moller, F.Montes, F.Naqvi, J.Pereira, C.Prokop, D.Richman, H.Schatz, K.Schmidt, A.Spyrou

β Decay of 61V and its Role in Cooling Accreted Neutron Star Crusts

RADIOACTIVITY 61V(β-), (β-n) [from 9Be(82Se, X), E=140 MeV/nucleon]; measured decay products, Eγ, Iγ, En, In; deduced branching for β-delayed neutron emission, β-feeding intensities, B(GT) strengths, log ft.

doi: 10.1103/PhysRevLett.125.262701
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2019LE05      Phys.Rev. C 99, 034601 (2019)

R.Lewis, S.N.Liddick, A.C.Larsen, A.Spyrou, D.L.Bleuel, A.Couture, L.Crespo Campo, B.P.Crider, A.C.Dombos, M.Guttormsen, S.Mosby, F.Naqvi, G.Perdikakis, C.J.Prokop, S.J.Quinn, T.Renstrom, S.Siem

Experimental constraints on the 73Zn(n, γ)74Zn reaction rate

RADIOACTIVITY 74Cu(β-)[74Cu ions from Be(86Kr, X), E=140 MeV/nucleon reaction and using A1900 separator at NSCL-MSU facility]; measured β particles, Eγ, Iγ, βγ-coin, half-life of 74Cu decay using the Summing NaI detector for total absorption spectroscopy (TAS); deduced nuclear level density (NLD), and γ strength function (γSF) using the β-Oslo method, distribution of spins for levels in 74Zn around S(n). Comparison with previous experimental results, and with theoretical calculations using TALYS code. Results used to deduce σ for 73Zn(n, γ) reaction.

NUCLEAR REACTIONS 73Zn(n, γ), E=0.01-1 MeV; deduced σ(E), and astrophysical reaction rates using the experimental NLD and γSF. Comparison with Hauser-Feshbach statistical model calculations using TALYS code.

doi: 10.1103/PhysRevC.99.034601
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2019LI35      Phys.Rev. C 100, 024624 (2019)

S.N.Liddick, A.C.Larsen, M.Guttormsen, A.Spyrou, B.P.Crider, F.Naqvi, J.E.Midtbo, F.L.Bello Garrote, D.L.Bleuel, L.Crespo Campo, A.Couture, A.C.Dombos, F.Giacoppo, A.Gorgen, K.Hadynska-Klek, T.W.Hagen, V.W.Ingeberg, B.V.Kheswa, R.Lewis, S.Mosby, G.Perdikakis, C.J.Prokop, S.J.Quinn, T.Renstrom, S.J.Rose, E.Sahin, S.Siem, G.M.Tveten, M.Wiedeking, F.Zeiser

Benchmarking the extraction of statistical neutron capture cross sections on short-lived nuclei for applications using the β-Oslo method

RADIOACTIVITY 51Sc(β-)[from 9Be(86Kr, X), E=140 MeV/nucleon]; measured Eβ, Iβ, Eγ, Iγ, βγ-coin; deduced level density, γ-strength function. Measurement was performed at NSCL using the Summing NaI(Tl) detector SuN, used as a TAS.

NUCLEAR REACTIONS 50Ti(d, p)51Ti, E=12.5 MeV; measured Ep, Ip, Eγ, Iγ, γp-coin; deduced nuclear level density (NLD), γ strength function (γSF). Measurement was performed at the Oslo Cyclotron Laboratory, Sweden using the CACTUS NaI scintillator array.

doi: 10.1103/PhysRevC.100.024624
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2019LY02      Phys.Rev. C 100, 025806 (2019)

S.Lyons, A.Spyrou, S.N.Liddick, F.Naqvi, B.P.Crider, A.C.Dombos, D.L.Bleuel, B.A.Brown, A.Couture, L.Crespo Campo, J.Engel, M.Guttormsen, A.C.Larsen, R.Lewis, P.Moller, S.Mosby, M.R.Mumpower, E.M.Ney, A.Palmisano, G.Perdikakis, C.J.Prokop, T.Renstrom, S.Siem, M.K.Smith, S.J.Quinn

69, 71Co β-decay strength distributions from total absorption spectroscopy

RADIOACTIVITY 69,71Co(β-)[from 9Be(86Kr, X), E=140 MeV/nucleon, followed by in flight separation of fragments by the A1900 fragment separator at NSCL-MSU]; measured Eγ, Iγ, Eβ, βγ-coin, half-lives of decays of 69,71Co decays, total absorption spectra using Summing NaI(Tl) (SuN) detector for γ rays and double-sided silicon strip detector (DSSD) for β; deduced cumulative Iβ distributions and compared to QRPA and Skyrme QRPA calculations, Gamow-Teller (GT) strength distribution. Comparison of decay half-lives with ENSDF values, and theoretical calculations using shell mode, QRPA and Skyrme QRPA. Relevance to r process in nucleosynthesis.

doi: 10.1103/PhysRevC.100.025806
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2018LA07      Phys.Rev. C 97, 054329 (2018)

A.C.Larsen, J.E.Midtbo, M.Guttormsen, T.Renstrom, S.N.Liddick, A.Spyrou, S.Karampagia, B.A.Brown, O.Achakovskiy, S.Kamerdzhiev, D.L.Bleuel, A.Couture, L.Crespo Campo, B.P.Crider, A.C.Dombos, R.Lewis, S.Mosby, F.Naqvi, G.Perdikakis, C.J.Prokop, S.J.Quinn, S.Siem

Enhanced low-energy γ-decay strength of 70Ni and its robustness within the shell model

RADIOACTIVITY 70Co(β-)[from 9Be(86Kr, X), E=140 MeV/nucleon followed by fragment separation using A1900 fragment separator at NSCL-MSU]; measured Eγ, Iγ, summed γ energies, β-γ-coin using double-sided silicon strip detector (DSSD) for electrons placed in the center of the Summing NaI (SuN) total absorption spectrometer for γ radiation. 70Ni; deduced nuclear level density (NLD) and γ-strength function (γSF) using β-Oslo method. Comparison with previous experimental results, and with HFB+c calculations.

NUCLEAR STRUCTURE 70Ni; calculated levels, J, π, B(E2), level densities, γSF, summed γSF, and M1 γ strengths for A=56-76 Ni isotopes. Quasiparticle time-blocking approximation and large-scale shell-model calculations with CA48MH1G and JUN45 interactions. Comparison with experimental results.

doi: 10.1103/PhysRevC.97.054329
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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
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2016CR05      Phys.Lett. B 763, 108 (2016)

B.P.Crider, C.J.Prokop, S.N.Liddick, M.Al-Shudifat, A.D.Ayangeakaa, M.P.Carpenter, J.J.Carroll, J.Chen, C.J.Chiara, H.M.David, A.C.Dombos, S.Go, R.Grzywacz, J.Harker, R.V.F.Janssens, N.Larson, T.Lauritsen, R.Lewis, S.J.Quinn, F.Recchia, A.Spyrou, S.Suchyta, W.B.Walters, S.Zhu

Shape coexistence from lifetime and branching-ratio measurements in 68, 70Ni

RADIOACTIVITY 70Co, 68Fe, 68Co(β-) [from 9Be(76Ge, X)70Co/68Fe]; measured reaction products, Eγ, Iγ; deduced energy levels, J, π, T1/2, branching ratios, B(E2).

doi: 10.1016/j.physletb.2016.10.020
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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
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2016SP04      Phys.Rev.Lett. 117, 142701 (2016)

A.Spyrou, S.N.Liddick, F.Naqvi, B.P.Crider, A.C.Dombos, D.L.Bleuel, B.A.Brown, A.Couture, L.Crespo Campo, M.Guttormsen, A.C.Larsen, R.Lewis, P.Moller, S.Mosby, M.R.Mumpower, G.Perdikakis, C.J.Prokop, T.Renstrom, S.Siem, S.J.Quinn, S.Valenta

Strong Neutron-γ Competition above the Neutron Threshold in the Decay of 70Co

RADIOACTIVITY 70Co(β-) [9Be(86Kr, X)70Co, E=140 MeV/nucleon]; measured decay products, Eβ, Iβ, Eγ, Iγ; deduced β-decay intensity, the large fragmentation of the β intensity at high energies, as well as the strong competition between γ-rays and neutrons. Comparison with shell model calculations.

doi: 10.1103/PhysRevLett.117.142701
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2015HO07      J.Radioanal.Nucl.Chem. 305, 267 (2015)

J.J.Horkley, K.P.Carney, E.M.Gantz, J.E.Davies, R.R.Lewis, J.P.Crow, C.A.Poole, T.S.Grimes, J.J.Giglio

Production of highly-enriched 134Ba for a reference material for isotope dilution mass spectrometry measurements

doi: 10.1007/s10967-015-4047-z
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2015PR10      Phys.Rev. C 92, 061302 (2015)

C.J.Prokop, B.P.Crider, S.N.Liddick, A.D.Ayangeakaa, M.P.Carpenter, J.J.Carroll, J.Chen, C.J.Chiara, H.M.David, A.C.Dombos, S.Go, J.Harker, R.V.F.Janssens, N.Larson, T.Lauritsen, R.Lewis, S.J.Quinn, F.Recchia, D.Seweryniak, A.Spyrou, S.Suchyta, W.B.Walters, S.Zhu

New low-energy 0+ state and shape coexistence in 70Ni

RADIOACTIVITY 70,70mCo(β-)[from 9Be(76Ge, X), E=130 MeV/nucleon using A1900 fragment separator at NSCL-MSU]; measured Eγ, Iγ, βγγ-, γγ-coin, level half-life by βγ(t) using SeGA array and silicon PIN detectors. 70Ni; deduced levels, J, π, energy and half-life of excited (0+) state, configuration. Comparison with Monte Carlo shell-model calculations with A3DA interaction. 68Co, 69Ni, 70Zn; observed γ rays from decay of contaminants.

doi: 10.1103/PhysRevC.92.061302
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2009DE33      Phys.Rev. C 80, 035806 (2009)

C.M.Deibel, J.A.Clark, R.Lewis, A.Parikh, P.D.Parker, C.Wrede

Toward an experimentally determined 26Alm(p, γ)27Si reaction rate in ONe novae

NUCLEAR REACTIONS 27Al(3He, t), E=25 MeV; 28Si(3He, α), E=17.5 MeV; measured Et, It, Eα, Iα, Ep, Ip, αp-coin, αp(θ). 27Si; deduced levels, angular momentum transfer, proton branching ratios from resonances. 26Al; deduced levels and feedings from proton decay of unbound states in 27Si. Deduced reaction rates for 26mAl(p, γ) reaction as a function of stellar temperature.

doi: 10.1103/PhysRevC.80.035806
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2009HE10      Astrophys.J. 701, 1415 (2009)

P.R.Heck, S.Amari, P.Hoppe, H.Baur, R.S.Lewis, R.Wieler

Ne Isotopes in Individual Presolar Graphite Grains from the Murchison Meteorite Together with He, C, O, Mg-Al Isotopic Analyses as Tracers of Their Origins

doi: 10.1088/0004-637X/701/2/1415
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2009MU07      Phys.Rev. C 79, 058801 (2009)

A.St.J.Murphy, A.M.Laird, C.Angulo, L.Buchmann, T.Davinson, P.Descouvemont, S.P.Fox, J.Jose, R.Lewis, C.Ruiz, K.Vaughan, P.Walden

Simultaneous measurement of the 18F(p, p)18F and 18F(p, α)15O reactions: Implications for the level structure of 19Ne, and for 18F production in novae

NUCLEAR REACTIONS 1H(18F, α), (18F, p), E=1.750 MeV/nucleon; measured particle spectra, σ. 19Ne; deduced levels, J, π, resonances, α widths, proton widths. R-matrix analysis. 18F(p, α)15O; deduced reaction rates.

doi: 10.1103/PhysRevC.79.058801
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2008VI06      Phys.Rev. C 78, 028802 (2008)

D.W.Visser, C.Wrede, J.A.Caggiano, J.A.Clark, C.M.Deibel, R.Lewis, A.Parikh, P.D.Parker

Addendum to "Measurement of 23Mg(p, γ)24Al resonance energies"

NUCLEAR REACTIONS 23Mg(p, γ), E not given; analyzed resonance energies. 24Al; deduced levels, J, resonances.

doi: 10.1103/PhysRevC.78.028802
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2007AB20      Eur.Phys.J. A 31, 773 (2007)

A.M.Abdel-Rehim, R.Lewis, R.M.Woloshyn, J.M.S.Wu

Lattice QCD with a twisted mass term and a strange quark

doi: 10.1140/epja/i2006-10245-y
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2007LE33      Eur.Phys.J. A 32, 409 (2007)

R.Lewis

Isospin breaking in the vector current of the nucleon

doi: 10.1140/epja/i2006-10401-5
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2007VI13      Phys.Rev.Lett. 99, 112002 (2007)

M.Viviani, R.Schiavilla, B.Kubis, R.Lewis, L.Girlanda, A.Kievsky, L.E.Marcucci, S.Rosati

Isospin Mixing in the Nucleon and 4He and the Nucleon Strange Electric Form Factor

NUCLEAR STRUCTURE 4He; calculated isospin breaking corrections needed to isolate the contribution of nucleon strange electric form factor to the parity violating assymetry measured in polarized electron scattering.

doi: 10.1103/PhysRevLett.99.112002
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2007VI16      Phys.Rev. C 76, 065803 (2007)

D.W.Visser, C.Wrede, J.A.Caggiano, J.A.Clark, C.Deibel, R.Lewis, A.Parikh, P.D.Parker

Measurement of 23Mg(p, γ)24Al resonance energies

NUCLEAR REACTIONS 24Mg(3He, t), E=30 MeV/nucleon; measured triton spectra, angular distributions. 24Al; deduced resonance energies, reaction rates. 23Mg(p, γ)24Al; resonance parameters.

doi: 10.1103/PhysRevC.76.065803
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2007VO06      Phys.Rev. C 76, 035801 (2007)

C.Vockenhuber, C.O.Ouellet, L.-S.The, L.Buchmann, J.Caggiano, A.A.Chen, H.Crawford, J.M.D'Auria, B.Davids, L.Fogarty, D.Frekers, A.Hussein, D.A.Hutcheon, W.Kutschera, A.M.Laird, R.Lewis, E.O'Connor, D.Ottewell, M.Paul, M.M.Pavan, J.Pearson, C.Ruiz, G.Ruprecht, M.Trinczek, B.Wales, A.Wallner

Measurement of the 40Ca(α, γ)44Ti reaction relevant for supernova nucleosynthesis

NUCLEAR REACTIONS 4He(40Ca, γ)44Ti, E=0.60-1.15 MeV/nucleon; measured recoil energies, yields, and cross section.

doi: 10.1103/PhysRevC.76.035801
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2006KU12      Phys.Rev. C 74, 015204 (2006)

B.Kubis, R.Lewis

Isospin violation in the vector form factors of the nucleon

NUCLEAR STRUCTURE A=1; calculated isospin-breaking vector form factors.

doi: 10.1103/PhysRevC.74.015204
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2006RU09      Phys.Rev.Lett. 96, 252501 (2006)

C.Ruiz, A.Parikh, J.Jose, L.Buchmann, J.A.Caggiano, A.A.Chen, J.A.Clark, H.Crawford, B.Davids, J.M.D'Auria, C.Davis, C.Deibel, L.Erikson, L.Fogarty, D.Frekers, U.Greife, A.Hussein, D.A.Hutcheon, M.Huyse, C.Jewett, A.M.Laird, R.Lewis, P.Mumby-Croft, A.Olin, D.F.Ottewell, C.V.Ouellet, P.Parker, J.Pearson, G.Ruprecht, M.Trinczek, C.Vockenhuber, C.Wrede

Measurement of the Ec.m. = 184 keV Resonance Strength in the 26gAl(p, γ)27Si Reaction

NUCLEAR REACTIONS 1H(26Al, γ), E=5.122, 5.226, 5.850 MeV; measured Eγ, (recoil)γ-coin. 26Al(p, γ), E(cm) ≈ 184 keV; deduced resonance strength. Astrophysical implications discussed.

doi: 10.1103/PhysRevLett.96.252501
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2005CH30      Nucl.Phys. A752, 510c (2005)

A.A.Chen, R.E.Azuma, S.Bishop, L.Buchmann, M.L.Chatterjee, J.M.D'Auria, S.Engel, D.Gigliotti, U.Greife, D.Hunter, A.Hussein, D.Hutcheon, C.C.Jewett, J.Jose, J.D.King, A.M.Laird, M.Lamey, R.Lewis, W.Liu, A.Olin, D.Ottewell, P.Parker, J.Rogers, C.Ruiz, M.Trinczek, C.Wrede

The 21Na(p, γ)22Mg reaction in novae and x-ray bursts

NUCLEAR REACTIONS 1H(21Na, γ), E(cm) ≈ 200-1100 keV; measured thick-target yield. 21Na(p, γ), E=low; deduced resonance parameters, astrophysical reaction rate.

doi: 10.1016/j.nuclphysa.2005.02.136
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2005CO15      Nucl.Phys. A758, 276c (2005)

A.L.Cole, R.N.Boyd, M.E.Davis, L.G.Thompson, A.M.Davis, R.S.Lewis, E.Zinner

The Search for Supernova Signatures in an Ice Core

doi: 10.1016/j.nuclphysa.2005.05.047
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2005LE30      Nucl.Phys. A758, 84c (2005)

R.Lewis, J.Caggiano, A.Parikh, C.Deibel, D.Visser, K.Fear, P.Parker, W.R.Hix

26Alg, m + p resonances studied via proton decays of 27Si

NUCLEAR REACTIONS 27Al(3He, t), E=25 MeV; measured Ep following residual nucleus decay to ground and metastable states. 27Si deduced resonance energy. Astrophysical implications discussed.

doi: 10.1016/j.nuclphysa.2005.05.166
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2005PA31      Phys.Rev. C 71, 055804 (2005)

A.Parikh, J.A.Caggiano, C.Deibel, J.P.Greene, R.Lewis, P.D.Parker, C.Wrede

Mass measurements of 22Mg and 26Si via the 24Mg(p, t)22Mg and 28Si(p, t)26Si reactions

NUCLEAR REACTIONS 24Mg, 28Si(p, t), E=33 MeV; measured triton spectra; deduced reaction Q-values. 22Mg, 26Si deduced mass excesses.

doi: 10.1103/PhysRevC.71.055804
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2005TR11      Nucl.Phys. A758, 729c (2005)

M.Trinczek, C.C.Jewett, J.M.D'Auria, S.Bishop, L.Buchmann, A.A.Chen, S.Engel, D.Gigliotti, U.Greife, D.Hunter, A.Hussein, D.Hutcheon, J.Jose, A.M.Laird, M.Lamey, R.Lewis, A.Olin, D.Ottewell, P.Parker, M.M.Pavan, J.E.Pearson, J.Rogers, C.Ruiz, C.Wrede

Direct Measurement of the 21Na(p, γ)22Mg Reaction: Resonance Strengths and Gamma-Gamma Analysis

NUCLEAR REACTIONS 1H(21Na, γ), E(cm)=200-1135 keV; measured Eγ, Iγ, γγ-coin. 22Mg deduced levels, J, π, resonance strengths.

doi: 10.1016/j.nuclphysa.2005.05.131
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2004DA17      Phys.Rev. C 69, 065803 (2004)

J.M.D'Auria, R.E.Azuma, S.Bishop, L.Buchmann, M.L.Chatterjee, A.A.Chen, S.Engel, D.Gigliotti, U.Greife, D.Hunter, A.Hussein, D.Hutcheon, C.C.Jewett, J.Jose, J.D.King, A.M.Laird, M.Lamey, R.Lewis, W.Liu, A.Olin, D.Ottewell, P.Parker, J.Rogers, C.Ruiz, M.Trinczek, C.Wrede

The 21Na(p, γ)22Mg reaction from Ec.m. = 200 to 1103 keV in novae and x-ray bursts

NUCLEAR REACTIONS 1H(21Na, γ), E(cm)=200-1103 keV; measured Eγ, Iγ, (particle)γ-coin; deduced resonance energies and strengths. 21Na(p, γ), E=low; deduced astrophysical reaction rates.

doi: 10.1103/PhysRevC.69.065803
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2004SC16      Phys.Rev.Lett. 92, 162501 (2004); Erratum Phys.Rev.Lett. 110, 169901 (2013)

J.P.Schiffer, S.J.Freeman, J.A.Caggiano, C.Deibel, A.Heinz, C.-L.Jiang, R.Lewis, A.Parikh, P.D.Parker, K.E.Rehm, S.Sinha, J.S.Thomas

Is the Nuclear Spin-Orbit Interaction Changing with Neutron Excess?

NUCLEAR REACTIONS 112,114,116,118,120,122,124Sn(α, t), E=40 MeV; measured σ(E, θ). 113,115,117,119,121,123,125Sb levels deduced spectroscopic factors, decrease in nuclear spin-orbit interaction. Nuclides near N=82 also discussed.

doi: 10.1103/PhysRevLett.92.162501
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2004VI05      Phys.Rev. C 69, 048801 (2004)

D.W.Visser, J.A.Caggiano, R.Lewis, W.B.Handler, A.Parikh, P.D.Parker

Particle decay branching ratios for states of astrophysical importance in 19Ne

NUCLEAR REACTIONS 19F(3He, t), E=25 MeV; measured triton spectra, Ep, Eα, angular distributions from residual nucleus decay. 19Ne levels deduced proton and α decay branching ratios. Astrophysical implications discussed.

doi: 10.1103/PhysRevC.69.048801
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2003AZ05      Nucl.Phys. A718, 119c (2003)

R.E.Azuma, S.Bishop, L.Buchmann, M.L.Chatterjee, A.A.Chen, J.M.D'Auria, T.Davinson, S.Engel, B.R.Fulton, D.Gigliotti, U.Greife, D.Groombridge, D.Hunter, A.Hussein, D.Hutcheon, C.Jewett, J.D.King, N.Khan, S.Kubono, A.M.Laird, M.Lamey, R.Lewis, L.Ling, W.Liu, S.Michimasa, A.S.Murphy, A.Olin, D.Ottewell, P.Parker, J.Pearson, I.Roberts, A.Robinson, J.G.Rogers, G.Roy, C.Ruiz, F.Sarazin, A.C.Shotter, H.Sprenger, F.Strieder, P.Walden, P.J.Woods, C.Wrede

Results of 21Na + p Experiments at ISAC

NUCLEAR REACTIONS 1H(21Na, 21Na), E=0.45-1.4 MeV; measured recoil proton spectra; deduced excitation function. 1H(21Na, γ), E=220, 855 keV/nucleon; measured Eγ, (particle)γ-coin. 22Mg deduced resonance features.

doi: 10.1016/S0375-9474(03)00688-2
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2003BI03      Phys.Rev.Lett. 90, 162501 (2003); Erratum Phys.Rev.Lett. 90, 229902 (2003)

S.Bishop, R.E.Azuma, L.Buchmann, A.A.Chen, M.L.Chatterjee, J.M.D'Auria, S.Engel, D.Gigliotti, U.Greife, M.Hernanz, D.Hunter, A.Hussein, D.Hutcheon, C.Jewett, J.Jose, J.King, S.Kubono, A.M.Laird, M.Lamey, R.Lewis, W.Liu, S.Michimasa, A.Olin, D.Ottewell, P.D.Parker, J.G.Rogers, F.Strieder, C.Wrede

21Na(p, γ)22Mg Reaction and Oxygen-Neon Novae

NUCLEAR REACTIONS 1H(21Na, γ), E(cm) ≈ 202-223 keV; measured Eγ, (particle)γ-coin, thick-target yields; deduced resonance energy, width. 21Na(p, γ), E=low; deduced astrophysical reaction rate.

doi: 10.1103/PhysRevLett.90.162501
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2003BI08      Nucl.Phys. A718, 263c (2003)

S.Bishop, R.Azuma, L.Buchmann, A.A.Chen, M.L.Chatterjee, J.M.D'Auria, S.Engel, D.Gigliotti, U.Greife, D.Hunter, A.Hussein, D.Hutcheon, C.Jewett, J.King, S.Kubono, M.Lamey, R.Lewis, W.Liu, S.Michimasa, A.Olin, D.Ottewell, P.D.Parker, J.Rogers, C.Wrede

Nuclear Astrophysics Studies at DRAGON: The 21Na(p, γ)22Mg Reaction and Oxygen-Neon Novae

NUCLEAR REACTIONS 1H(21Na, γ), E(cm) ≈ 202-224 keV; measured thick target yields. 21Na(p, γ), E=low; deduced astrophysical reaction rate. Recoil mass separator.

doi: 10.1016/S0375-9474(03)00726-7
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2003EN08      Nucl.Phys. A719, 107c (2003)

S.Engel, S.Bishop, L.Buchmann, M.L.Chatterjee, A.Chen, J.M.D'Auria, D.Gigliotti, U.Greife, D.Hunter, A.Hussein, R.Lewis, W.Liu, A.Olin, D.Ottewell, P.Parker, J.Rogers, F.Strieder, C.Wrede

Measurements with DRAGON on resonances in the 21Na(p, γ)22Mg reaction with a radioactive ion beam

NUCLEAR REACTIONS 1H(21Na, γ), E(cm) ≈ 204, 821 keV; measured yields. 21Na(p, γ), E(cm) ≈ 204, 821 keV; deduced resonance strengths.

doi: 10.1016/S0375-9474(03)00976-X
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2003LE03      Phys.Rev. D 67, 013003 (2003)

R.Lewis, W.Wilcox, R.M.Woloshyn

Nucleon's strange electromagnetic and scalar matrix elements

NUCLEAR STRUCTURE 1n, 1H; calculated strangeness matrix elements. Quenched lattice QCD, quenched chiral perturbation theory, comparison with data.

doi: 10.1103/PhysRevD.67.013003
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2003LE21      Nucl.Phys. B(Proc.Supp.) S119, 404 (2003)

R.Lewis, W.Wilcox, R.M.Woloshyn

Strange matrix elements of the nucleon

NUCLEAR STRUCTURE 1n, 1H; calculated strangeness form factors.

doi: 10.1016/S0920-5632(03)01568-8
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2003OL08      Nucl.Phys. A721, 1019c (2003)

A.Olin, S.Bishop, L.Buchmann, M.L.Chatterjee, A.Chen, J.M.D'Auria, S.Engel, D.Gigliotti, U.Greife, D.Hunter, A.Hussein, D.Hutcheon, C.Jewett, J.King, S.Kubono, M.Lamey, A.M.Laird, R.Lewis, W.Liu, S.Michimasa, D.Ottewell, P.Parker, J.Rogers, F.Strieder, C.Wrede

Nuclear Astrophysics at ISAC with DRAGON: Initial Studies

NUCLEAR REACTIONS 1H(21Na, γ), E(cm) ≈ 212, 822 keV/nucleon; measured resonance excitation functions.

doi: 10.1016/S0375-9474(03)01275-2
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2002CA24      Phys.Rev. C65, 055801 (2002)

J.A.Caggiano, W.Bradfield-Smith, R.Lewis, P.D.Parker, D.W.Visser, J.P.Greene, K.E.Rehm, D.W.Bardayan, A.E.Champagne

Identification of New States in 26Si using the 29Si(3He, 6He)26Si Reaction and Consequences for the 25Al(p, γ)26Si Reaction Rate in Explosive Hydrogen Burning Environments

NUCLEAR REACTIONS 29Si(3He, 6He), E=51 MeV; measured particle spectra. 26Si deduced levels, J, π. 25Al(p, γ), E=stellar; calculated astrophysical reaction rates.

doi: 10.1103/PhysRevC.65.055801
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2002CA36      Phys.Rev. C66, 015804 (2002)

J.A.Caggiano, W.Bradfield-Smith, J.P.Greene, R.Lewis, P.D.Parker, K.E.Rehm, D.W.Visser

Excitation Energies in 22Mg from the 25Mg(3He, 6He)22Mg Reaction

NUCLEAR REACTIONS 25Mg(3He, 6He), E=51 MeV; measured particle spectra. 22Mg deduced level energies. Comparison with previous results.

doi: 10.1103/PhysRevC.66.015804
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2001BA49      Phys.Rev. C63, 065802 (2001)

D.W.Bardayan, J.C.Blackmon, W.Bradfield-Smith, C.R.Brune, A.E.Champagne, T.Davinson, B.A.Johnson, R.L.Kozub, C.S.Lee, R.Lewis, P.D.Parker, A.C.Shotter, M.S.Smith, D.W.Visser, P.J.Woods

Destruction of 18F via 18F(p, α)15O Burning Through the Ec.m. = 665 keV Resonance

NUCLEAR REACTIONS 1H(18F, p), (18F, α), E=10-14 MeV; measured particle spectra, σ(θ), σ. 18F(p, α), E(cm)=663 keV; deduced σ. 19Ne deduced resonance energy, width, proton branching ratio. Astrophysical implications discussed.

doi: 10.1103/PhysRevC.63.065802
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2001BA59      Nucl.Phys. A688, 475c (2001)

D.W.Bardayan, J.C.Blackmon, W.Bradfield-Smith, C.R.Brune, A.E.Champagne, T.Davinson, B.A.Johnson, R.L.Kozub, C.S.Lee, R.Lewis, P.D.Parker, A.C.Shotter, M.S.Smith, D.W.Visser, P.J.Woods

Determination of the Properties of the 7.08 MeV State in 19Ne by Measurement of the 1H(18F, p)18F and 1H(18F, α)15O Cross Sections with a Radioactive 18F Beam

NUCLEAR REACTIONS 1H(18F, p), (18F, α), E(cm)=500-800 keV; measured σ(θ). 19Ne deduced resonance parameters. Comparison with earlier data.

doi: 10.1016/S0375-9474(01)00760-6
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2001CH35      Phys.Rev. C63, 065807 (2001)

A.A.Chen, R.Lewis, K.B.Swartz, D.W.Visser, P.D.Parker

Structure of 22Mg and Its Implications for Explosive Nucleosynthesis

NUCLEAR REACTIONS 12C(16O, 6He), E=90 MeV; measured particle spectra, σ(θ). 22Mg deduced levels, resonances. 18Ne(α, p), E not given; calculated stellar reaction rates.

doi: 10.1103/PhysRevC.63.065807
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2001CH43      Nucl.Phys. A688, 146c (2001)

A.A.Chen, R.Lewis, K.B.Swartz, D.W.Visser, P.D.Parker

The Structure of 22Mg and Its Implications for Explosive Nucleosynthesis

NUCLEAR REACTIONS 12C(16O, 6He), E=90 MeV; measured 6He excitation energy spectrum. 18Ne(α, p), E=low; calculated reaction rate at temperatures of astrophysical interest, comparison with previous calculations. 22Mg deduced levels energy.

doi: 10.1016/S0375-9474(01)00687-X
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2001FE08      Nucl.Phys. A684, 377c (2001)

H.W.Fearing, Th.R.Hemmert, R.Lewis, C.Unkmeir

Charged Radiative Pion Capture on the Nucleon in Heavy Baryon Chiral Perturbation Theory

NUCLEAR REACTIONS 1H(π-, γ), 1n(π+, γ), E not given; analyzed data; deduced parameters. Heavy baryon chiral perturbation theory.

doi: 10.1016/S0375-9474(01)00399-2
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2001VI08      Nucl.Phys. A688, 456c (2001)

D.W.Visser, P.D.Parker, W.Bradfield-Smith, R.Lewis

Planned Measurement of Particle Branching Ratios of Astrophysically Interesting States in 22Mg

doi: 10.1016/S0375-9474(01)00754-0
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2000BA87      Phys.Rev. C62, 042802 (2000)

D.W.Bardayan, J.C.Blackmon, W.Bradfield-Smith, C.R.Brune, A.E.Champagne, T.Davinson, B.A.Johnson, R.L.Kozub, C.S.Lee, R.Lewis, P.D.Parker, A.C.Shotter, M.S.Smith, D.W.Visser, P.J.Woods

Kinematically Complete Measurement of the 1H(18F, p)18F Excitation Function for the Astrophysically Important 7.08-MeV State in 19Ne

NUCLEAR REACTIONS 1H(18F, 18F), E=10-14 MeV; measured proton spectra, yields, (fluorine)(proton)-coin. 19Ne deduced resonance E, Γ. Kinematically complete measurement.

doi: 10.1103/PhysRevC.62.042802
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2000FE15      Phys.Rev. C62, 054006 (2000)

H.W.Fearing, T.R.Hemmert, R.Lewis, C.Unkmeir

Radiative Pion Capture by a Nucleon

NUCLEAR REACTIONS 1H(π-, γ), E=10-39 MeV; 1H(γ, π+), E=153 MeV; calculated σ(θ). 1n(γ, π-), 1H(γ, π+), E=threshold; calculated s- and p-wave multipoles. Heavy baryon chiral perturbation theory, comparisons with data.

doi: 10.1103/PhysRevC.62.054006
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1999LE04      Phys.Rev. C59, 1211 (1999)

R.Lewis, A.C.Hayes

Deuteron Stripping as a Probe of the Proton Halo in 17F

NUCLEAR REACTIONS 16O(d, n), (d, p), E=8 MeV; analyzed σ(θ); deduced parameters. 17O, 17F deduced radii, halo features.

doi: 10.1103/PhysRevC.59.1211
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1999LE08      Phys.Rev. D59, 073002 (1999)

R.Lewis, N.Mobed

Isospin Violation and the Proton's Neutral Weak Magnetic Form Factor

NUCLEAR STRUCTURE 1H; calculated neutral weak magnetic form factor, isospin violation effects, resonance contributions. Two-flavor chiral perturbation theory.

doi: 10.1103/PhysRevD.59.073002
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1998FE02      Nucl.Phys. A631, 735c (1998)

H.W.Fearing, R.Lewis, N.Mobed, S.Scherer

Radiative and Non Radiative Muon Capture on the Proton in Heavy Baryon Chiral Perturbation Theory

doi: 10.1016/S0375-9474(98)00101-8
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1998NI12      Astrophys.J. 504, 492 (1998)

G.K.Nicolussi, M.J.Pellin, R.S.Lewis, A.M.Davis, R.N.Clayton, S.Amari

Zirconium and Molybdenum in Individual Circumstellar Graphite Grains: New isotopic data on the nucleosynthesis of heavy elements

doi: 10.1086/306072
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1998NI15      Phys.Rev.Lett. 81, 3583 (1998)

G.K.Nicolussi, M.J.Pellin, R.S.Lewis, A.M.Davis, R.N.Clayton, S.Amari

Strontium Isotopic Composition in Individual Circumstellar Silicon Carbide Grains: A record of s-process nucleosynthesis

doi: 10.1103/PhysRevLett.81.3583
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1997FE10      Phys.Rev. D56, 1783 (1997)

H.W.Fearing, R.Lewis, N.Mobed, S.Scherer

Muon Capture by a Proton in Heavy Baryon Chiral Perturbation Theory

NUCLEAR REACTIONS 1H(μ-, n), E not given; calculated form factors. Chiral Perturbation Theory, Ecker-Mojzis Lagrangian.

doi: 10.1103/PhysRevD.56.1783
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1996FE05      Yad.Fiz. 59, No 9, 1551 (1996); Phys.Atomic Nuclei 59, 1492 (1996)

X.Feng, M.H.Holzscheiter, M.Charlton, F.Cverna, T.Ichioka, N.S.P.King, R.A.Lewis, G.L.Morgan, J.Rochet, Y.Yamazaki

Ultralow-Energy Antiprotons for Antihydrogen Spectroscopy and Antimatter Gravity


1994SI30      Z.Phys. A347, 277 (1994)

A.A.Sibirtsev, T.A.Armstrong, C.Lam, R.A.Lewis, E.D.Minor, G.A.Smith

Fast Deuteron Production from Antiproton Annihilation at Rest on Carbon and Uranium Targets

NUCLEAR REACTIONS 12C, 238U(p-bar, d), E at rest; measured deuteron yields up to Ed < 120 MeV following annihilation. Coalescence model.

doi: 10.1007/BF01289795
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1993AR03      Phys.Rev. C47, 1957 (1993)

T.A.Armstrong, J.P.Bocquet, G.Ericsson, T.Johansson, T.Krogulski, R.A.Lewis, F.Malek, M.Maurel, E.Monnand, J.Mougey, H.Nifenecker, J.Passaneau, P.Perrin, S.M.Polikanov, M.Rey-Campagnolle, C.Ristori, G.A.Smith, G.Tibell

Fission of Heavy Hypernuclei Formed in Antiproton Annihilation

NUCLEAR REACTIONS 238U(p-bar, X), E at 105 MeV/c; measured hypernuclei yield, fission (fragment)(fragment)-coin; deduced fission hypernuclei T1/2.

doi: 10.1103/PhysRevC.47.1957
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1993PR05      Astrophys.J. 410, 393 (1993)

C.A.Prombo, F.A.Podosek, S.Amari, R.S.Lewis

s-Process Ba Isotopic Compositions in Presolar SiC from the Murchiscon Meteorite

doi: 10.1086/172756
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1992AR27      Yad.Fiz. 55, 1568 (1992); Sov.J.Nucl.Phys. 55, 865 (1992)

T.Armstrong, D.Bettoni, V.Bharadwaj, C.Biino, G.Borreani, D.Broemmelsiek, A.Buzzo, R.Galabrese, A.Ceccucci, R.Cester, M.Church, P.Dalpiaz, P.F.Dalpiaz, R.Dibenedetto, D.Dimitroyannis, M.Fabbri, J.Fast, E.Ferroni, A.Gianoli, C.M.Ginsburg, K.Gollwitzer, A.Hahn, M.Hasan, S.Hsueh, R.Lewis, E.Luppi, M.Macri, A.M.Majewska, M.Mandelkern, F.Marchetto, M.Marinelli, J.Marques, W.Marsh, M.Martini, M.Masuzawa, E.Minechetti, A.Migliori, R.Mussa, S.Palestini, N.Pastrone, C.Patrignani, J.Peoples, Jr., L.Pesando, R.Petrucci, M.G.Pia, S.Pordes, P.Rapidis, R.Ray, J.Reid, G.Rinaudo, B.Roccuzzo, J.Rosen, A.Santroni, M.Sarmineto, M.Savrie, A.Scalisi, J.Schultz, K.Seth, A.Smith, G.A.Smith, M.Sozzi, S.Trokenheim, M.F.Weber, S.Werkema, Y.Zhang, J.Zhao, G.Zioulas

A New Measurement of the Proton Electromagnetic Form Factor in the Time-Like Region at High Energy

NUCLEAR REACTIONS 1H(p-bar, e-e+), E not given; measured (e+e-) opening angle σ(θ). 1H deduced electromagnetic form factor.


1992CH12      Phys.Rev. C45, 2332 (1992)

B.Chen, T.A.Armstrong, R.A.Lewis, R.Newton, G.A.Smith, J.P.Bocquet, F.Malek, H.Nifenecker, M.Maurel, E.Monnand, P.Perrin, C.Ristori, G.Ericsson, T.Johansson, G.Tibell, M.Rey-Campagnolle, S.Polikanov, T.Krogulski, J.Mougey

Neutron Yields and Angular Distributions Produced in Antiproton Annihilation at Rest in Uranium

NUCLEAR REACTIONS U(p-bar, F), E at rest; measured fission (fragment)n-coin, neutron yields; deduced fragment neutron emission mechanism.

doi: 10.1103/PhysRevC.45.2332
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1991GR22      Phys.Rev. D44, 1945 (1991)

N.A.Graf, M.Fero, M.Gee, M.Mandelkern, R.Ray, D.Schultz, J.Schultz, T.Usher, T.A.Armstrong, J.Biard, R.A.Lewis, S.M.Playfer, G.A.Smith, M.J.Soulliere, B.Bassalleck, D.M.Wolfe, P.Denes, G.Buche, L.Burcker, H.Koch, J.Schwertel, A.Angelopoulos, A.Apostolakis, H.Rozaki, L.Sakelliou

Search for Narrow States in the Inclusive γ-Ray Spectra Resulting from Antiproton Annihilations at Rest in Liquid Hydrogen and Deuterium

NUCLEAR REACTIONS 1H(p-bar, X), E at rest; measured annihilation γ-spectra.

doi: 10.1103/PhysRevD.44.1945
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1990MI09      Z.Phys. A336, 461 (1990)

E.D.Minor, T.A.Armstrong, R.Bishop, V.Harris, R.A.Lewis, G.A.Smith

Charged Pion Spectra and Energy Transfer following Antiproton Annihilation at Rest in Carbon and Uranium

NUCLEAR REACTIONS C, U(p-bar, X), E at rest; measured charge pion multiplicities; deduced total energy yield. Intranuclear cascade model.


1988MU13      Phys.Rev. D38, 742 (1988)

G.S.Mutchler, J.Clement, J.Kruk, R.Moss, E.Hungerford, T.Kishimoto, B.Mayes, L.Pinsky, L.Tang, Y.Xu, B.Bassalleck, T.Armstrong, K.Hartman, A.Hicks, R.Lewis, W.Lochstet, G.A.Smith, D.Lowenstein, H.Poth, W.von Witsch, M.Furic

Measurement of the Imaginary Part of the I = 1 (N-Bar)N S-Wave Scattering Length

NUCLEAR REACTIONS 1H(p-bar, n-bar), E at 415 MeV/c; measured n-bar spectra; deduced (p)(n-bar) S-wave scattering length.

doi: 10.1103/PhysRevD.38.742
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1965LE25      Trans.Am.Nucl.Soc. 8, 79 (1965)

R.E.Lewis, R.E.McHenry, T.A.Butler

Half-Life of Cs-137

NUCLEAR STRUCTURE 137Cs; measured not abstracted; deduced nuclear properties.


1959CO92      Phys.Rev.Letters 3, 420 (1959)

F.D.Colegrove, P.A.Franken, R.R.Lewis, R.H.Sands

Novel Method of Spectroscopy with Applications to Precision Fine Structure Measurements

doi: 10.1103/PhysRevLett.3.420
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1958BE97      Phys.Rev. 112, 232 (1958)

J.Bernstein, R.R.Lewis

Vector Interaction in Beta Decay

doi: 10.1103/PhysRev.112.232
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1956SM03      J.Chem.Phys. 25, 502 (1956)

R.R.Smith, S.D.Reeder, R.H.Lewis

Successive Neutron Capture in Tb159

doi: 10.1063/1.1742953
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1956SM25      Phys.Rev. 101, 1053 (1956)

R.R.Smith, N.P.Alley, R.H.Lewis, A.VanderDoes

Neutron Absorption Cross Sections of Pa231 and Pa232

doi: 10.1103/PhysRev.101.1053
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset12273.


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Note: The following list of authors and aliases matches the search parameter R.Lewis: , R.A.LEWIS, R.E.LEWIS, R.H.LEWIS, R.R.LEWIS, R.S.LEWIS