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NSR database version of April 11, 2024.

Search: Author = C.Marshall

Found 14 matches.

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2024FO01      Phys.Rev.Lett. 132, 062701 (2024)

W.Fox, R.Longland, C.Marshall, F.P.Chaves

High Resolution Study of 40Ca to Constrain Potassium Nucleosynthesis in NGC 2419

NUCLEAR REACTIONS 39K(3He, d)40Ca, E=21 MeV; measured reaction products; deduced σ(θ), energies, J, π, spectroscopic factors, and proton partial widths, resonance parameters. Comparison with ENSDF library. The 10 MV FN tandem Van de Graaff accelerator, the Enge Split-Pole Spectrograph at the Triangle Universities Nuclear Laboratory (TUNL).

doi: 10.1103/PhysRevLett.132.062701
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2023CO08      Nucl.Instrum.Methods Phys.Res. A1056, 168654 (2023)

A.L.Cooper, S.Hunt, L.Downen, K.Setoodehnia, F.Portillo, C.Marshall, T.B.Clegg, A.E.Champagne, R.Longland

Correlated characterization of 20Ne-implanted targets using nuclear reaction analysis, Rutherford backscattering spectrometry, and ion transport modeling

NUCLEAR REACTIONS 20Ne(p, γ), E=1169 keV; 20Ne(α, α), E=2 MeV; measured reaction products, Eγ, Iγ; deduced resonance parameters, yields. The model FN tandem Van de Graaff accelerator at TUNL.

doi: 10.1016/j.nima.2023.168654
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2023CO09      Nucl.Instrum.Methods Phys.Res. A1056, 168648 (2023)

A.L.Cooper, S.Hunt, L.Downen, K.Setoodehnia, F.Portillo, C.Marshall, T.B.Clegg, A.E.Champagne, R.Longland

252Cf yield calibration method for nuclear material accountancy and safeguards practitioners

RADIOACTIVITY 252Cf(SF); measured decay products, En, In; deduced neutron yields using passive neutron correlation counting (PNCC). The neutron source used in this evaluation was previously certified by the National Institutes of Science and Technology (NIST), which provides a reference for the accuracy of the PNCC method.

doi: 10.1016/j.nima.2023.168648
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2023MA18      Phys.Rev. C 107, 035806 (2023)

C.Marshall, K.Setoodehnia, G.C.Cinquegrana, J.H.Kelly, F.Portillo Chaves, A.Karakas, R.Longland

New constraints on sodium production in globular clusters from the 23Na(3He, d)24Mg reaction

NUCLEAR REACTIONS 23Na(3He, d)24Mg, 23Na(3He, 3He), E=21 MeV; measured reaction products, angular distribution; deduced yields, resonances, resonance widths. 24Mg; deduced levels, spectroscopic factors, proton decay partial width for excited states. 23Na(p, γ), (p, α), T=0.01-0.5 GK; calculated reaction rate using data obtained in current work on the excited states of 24Mg. Bayesian method combined with the distorted wave Born approximation to assign statistically meaningful uncertainties to deduced values. Relevance to NeNa cycle and star-to-star anticorrelation of sodium and oxygen. Split-pole spectrograph (SPS) at 10 MV TUNL FN tandem accelerator.

doi: 10.1103/PhysRevC.107.035806
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2023PO03      Phys.Rev. C 107, 035809 (2023)

F.Portillo, R.Longland, A.L.Cooper, S.Hunt, A.M.Laird, C.Marshall, K.Setoodehnia

Spin-parities of subthreshold resonances in the 18F(p, α)15O reaction

NUCLEAR REACTIONS 20Ne(3He, α)19Ne, E=21 MeV; measured reaction products, Eα, Iα, α(θ); deduced exclusive σ(θ) for excited states of 19Ne, resonances, resonance widths. 19Ne; deduced levels, J, π. 18F(p, α)15O, E<1900 keV; deduced astrophysical S factor using obtained information on 19Ne excited states corresponding to 18F+p resonances, reaction rates. R-matrix analysis. Comparison to other experimental data. Enge split-pole magnetic spectrograph at 10 MV FN Tandem Van de Graaff accelerator (TUNL).

doi: 10.1103/PhysRevC.107.035809
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Data from this article have been entered in the XUNDL database. For more information, click here.


2022PS02      Phys.Rev.Lett. 129, 162701 (2022)

A.Psaltis, A.A.Chen, R.Longland, D.S.Connolly, C.R.Brune, B.Davids, J.Fallis, R.Giri, U.Greife, D.A.Hutcheon, L.Kroll, A.Lennarz, J.Liang, M.Lovely, M.Luo, C.Marshall, S.N.Paneru, A.Parikh, C.Ruiz, A.C.Shotter, M.Williams

Direct Measurement of Resonances in 7Be(α, γ)11C Relevant to νp-Process Nucleosynthesis

NUCLEAR REACTIONS 4He(7Be, γ)11C, E not given; measured reaction products, Eγ, Iγ; deduced resonance energies and strengths, thermonuclear reaction rates. Comparison with available data. DRAGON recoil separator, TRIUMF.

doi: 10.1103/PhysRevLett.129.162701
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Data from this article have been entered in the XUNDL database. For more information, click here.


2022PS03      Phys.Rev. C 106, 045805 (2022)

A.Psaltis, A.A.Chen, R.Longland, D.S.Connolly, C.R.Brune, B.Davids, J.Fallis, R.Giri, U.Greife, D.A.Hutcheon, L.Kroll, A.Lennarz, J.Liang, M.Lovely, M.Luo, C.Marshall, S.N.Paneru, A.Parikh, C.Ruiz, A.C.Shotter, M.Williams

First inverse kinematics measurement of resonances in 7Be(α, γ)11C relevant to neutrino-driven wind nucleosynthesis using DRAGON

NUCLEAR REACTIONS 4He(7Be, γ), E=351-464 keV/nucleon; measured reaction products, Eγ, Iγ, γ-sum, (particle)γ-coin; deduced 1110-, 1115- and 876-keV resonances strength, thermonuclear reaction rate (T=0.1-10 GK), astrophysical S-factor. Discussed the impact of newly determined rates on studies of nucleosynthesis in neutrino-driven winds. Helium-filled windowless gas target surrounded by γ-ray array of 30 BGO scintillator crystals at DRAGON recoil separator (TRIUMF).

doi: 10.1103/PhysRevC.106.045805
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Data from this article have been entered in the XUNDL database. For more information, click here.


2021MA61      Phys.Rev. C 104, L032801 (2021)

C.Marshall, K.Setoodehnia, F.Portillo, J.H.Kelley, R.Longland

New energy for the 133-keV resonance in the 23Na(p, γ)24Mg reaction and its impact on nucleosynthesis in globular clusters

NUCLEAR REACTIONS 23Na(3He, d)24Mg, E=21 MeV; measured E(d), I(d), σ(θ) using Enge split-pole spectrograph and a focal plane detector at the TUNL Tandem accelerator laboratory. 24Mg; deduced levels, resonances, excitation energy for a key proton resonance of 133-keV. 23Na(p, γ)24Mg, T9=0.01-0.5; deduced astrophysical reaction rates using the energy of the 133 keV resonance determined in the present work and the RatesMC Monte Carlo reaction rate code, median drop of 50% in the predicted 23Na abundance and corresponding increase by a factor of 2.5 in the 24Mg abundance using the present reaction rates, impact of 133-keV resonance on nucleosynthesis during hydrogen burning.

doi: 10.1103/PhysRevC.104.L032801
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2020FE10      Appl.Radiat.Isot. 166, 109294 (2020)

A.J.Fenwick, S.M.Collins, W.D.Evans, K.M.Ferreira, S.J.Paisey, A.P.Robinson, C.Marshall

Absolute standardisation and determination of the half-life and gamma emission intensities of 89Zr

RADIOACTIVITY 89Zr(EC); measured decay products, Eβ, Iβ, Eγ, Iγ; deduced γ-ray energies and intensities, T1/2. Comparison with available data.

doi: 10.1016/j.apradiso.2020.109294
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Data from this article have been entered in the XUNDL database. For more information, click here.


2020HA09      Eur.Phys.J. A 56, 36 (2020)

C.B.Hamill, P.J.Woods, D.Kahl, R.Longland, J.P.Greene, C.Marshall, F.Portillo, K.Setoodehnia

Study of the 25Mg(d, p)26Mg reaction to constrain the 25Al(p, γ)26Si resonant reaction rates in nova burning conditions

doi: 10.1140/epja/s10050-020-00052-9
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2020MA36      Phys.Rev. C 102, 024609 (2020)

C.Marshall, P.Morfouace, N.de Sereville, R.Longland

Bayesian analysis of the 70Zn(d, 3He) 69Cu transfer reaction

NUCLEAR REACTIONS 70Zn(d, 3He)69Cu, E=27.0 MeV; analyzed previous experimental data using Bayesian methods. 69Cu; deduced levels, L-transfers, J, π, and spectroscopic factors. Zero-range DWBA analysis of σ(θ) data using Markov chain Monte Carlo to quantify optical model uncertainties, with nested sampling to assign probabilities to ambiguous L-transfers.

doi: 10.1103/PhysRevC.102.024609
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2019SE09      Phys.Rev. C 99, 055812 (2019)

K.Setoodehnia, J.H.Kelley, C.Marshall, F.Portillo Chaves, R.Longland

Experimental study of 35Cl excited states via 32S(α, p)

NUCLEAR REACTIONS 32S(α, p), (α, α), E=21 MeV; measured Ep, Ip, Eα, Iα, and differential σ(θ) using Enge split-pole magnetic spectrograph at the 10-MV FN tandem Van de Graaff accelerator facility at TUNL. 35Cl; deduced levels, J, π. 34S(p, γ), at T=0.010-10.0 GK; deduced astrophysical reaction rate. DWBA analysis of σ(θ) data using FRESCO code. Comparison with previous experimental results, and evaluated data in the ENSDF database. 28Si(α, p)31P, E=21 MeV; measured Ep, Ip; deduced levels; used for spectral calibration.

doi: 10.1103/PhysRevC.99.055812
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2461. Data from this article have been entered in the XUNDL database. For more information, click here.


2018LO17      Phys.Rev. C 98, 025802 (2018)

R.Longland, J.Dermigny, C.Marshall

Reaction rates for the 39K (p, γ) 40Ca reaction

NUCLEAR REACTIONS 39K(p, γ)40Ca; 39K(p, α)36Ar; analyzed, compiled and evaluated data for energies and strengths of proton- and α-resonances. 39K(p, γ)40Ca, T9=0.010-10.0; deduced astrophysical reaction rates corresponding to the 16th, 50th, and 84th percentiles of the Monte Carlo probability density distributions.Discussed Mg-K anticorrelation in the globular cluster NGC 2419.

doi: 10.1103/PhysRevC.98.025802
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2018SE20      Phys.Rev. C 98, 055804 (2018)

K.Setoodehnia, C.Marshall, J.H.Kelley, J.Liang, F.Portillo Chaves, R.Longland

Excited states of 39Ca and their significance in nova nucleosynthesis

NUCLEAR REACTIONS 40Ca(3He, α), E=21 MeV; measured Eα, Iα, σ(θ), using Enge split-pole magnetic spectrograph at the 10-MV FN tandem Van de Graaff accelerator of TUNL facility. DWBA analysis of σ(θ) data. 39Ca; deduced levels, J, π, resonances. Comparison with previous experimental data for 39Ca levels from (3He, α), (d, t) and (p, d) reactions, and in ENSDF evaluation. 38K(p, γ), T9=0.1-0.5; calculated contributions of resonances to astrophysical reaction rate in the nova temperature regime.

doi: 10.1103/PhysRevC.98.055804
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2386. Data from this article have been entered in the XUNDL database. For more information, click here.


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