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NSR database version of May 24, 2024.

Search: Author = M.C.Spraker

Found 16 matches.

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2022LI18      Phys.Rev.Lett. 128, 132502 (2022)

X.Li, M.W.Ahmed, A.Banu, C.Bartram, B.Crowe, E.J.Downie, M.Emamian, G.Feldman, H.Gao, D.Godagama, H.W.Griesshammer, C.R.Howell, H.J.Karwowski, D.P.Kendellen, M.A.Kovash, K.K.H.Leung, D.M.Markoff, J.A.McGovern, S.Mikhailov, R.E.Pywell, M.H.Sikora, J.A.Silano, R.S.Sosa, M.C.Spraker, G.Swift, P.Wallace, H.R.Weller, C.S.Whisnant, Y.K.Wu, Z.W.Zhao

Proton Compton Scattering from Linearly Polarized Gamma Rays

NUCLEAR REACTIONS 1H(polarized γ, γ'), E=83.4 MeV; measured reaction products, Eγ, Iγ; deduced σ(θ), electromagnetic dipole polarizabilities of the proton. The High Intensity Gamma-Ray Source facility at the Triangle Universities Nuclear Laboratory.

doi: 10.1103/PhysRevLett.128.132502
Citations: PlumX Metrics


2020LI10      Phys.Rev. C 101, 034618 (2020)

X.Li, M.W.Ahmed, A.Banu, C.Bartram, B.Crowe, E.J.Downie, M.Emamian, G.Feldman, H.Gao, D.Godagama, H.W.Griesshammer, C.R.Howell, H.J.Karwowski, D.P.Kendellen, M.A.Kovash, K.K.H.Leung, D.Markoff, S.Mikhailov, R.E.Pywell, M.H.Sikora, J.A.Silano, R.S.Sosa, M.C.Spraker, G.Swift, P.Wallace, H.R.Weller, C.S.Whisnant, Y.K.Wu, Z.W.Zhao

Compton scattering from 4He at the TUNL HIγS facility

NUCLEAR REACTIONS 4He(polarized γ, γ), E=81.3 MeV, 100% circularly and linearly polarized γ-ray beam via Compton backscattering from HiγS at TUNL; measured Compton scattered photons at different angles, time-of-flight spectra using an array of large NaI(Tl) detectors; deduced differential σ(θ). Comparison with previous experimental data from Lund at Eγ=87 MeV.

doi: 10.1103/PhysRevC.101.034618
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetL0259.


2017SI26      Phys.Rev. C 96, 055209 (2017)

M.H.Sikora, M.W.Ahmed, A.Banu, C.Bartram, B.Crowe, E.J.Downie, G.Feldman, H.Gao, H.W.Griesshammer, H.Hao, C.R.Howell, H.J.Karwowski, D.P.Kendellen, M.A.Kovash, X.Li, D.M.Markoff, S.Mikhailov, V.Popov, R.E.Pywell, J.A.Silano, M.C.Spraker, P.Wallace, H.R.Weller, C.S.Whisnant, Y.K.Wu, W.Xiong, X.Yan, Z.W.Zhao

Compton scattering from 4He at 61 MeV

NUCLEAR REACTIONS 4He(γ, γ'), E=61 MeV; measured Eγ, Iγ, Compton scattering differential σ(θ) using NaI(Tl) detectors and liquid 4He target at HIγS facility at TUNL. Data interpreted using phenomenological model sensitive to the dipole isoscalar electromagnetic polarizabilities of the nucleon. Comparison with previous experimental data. Benchmarks for future calculations from effective field theories and lattice quantum chromodynamics.

doi: 10.1103/PhysRevC.96.055209
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetL0232.


2015MU09      Phys.Rev. C 92, 034604 (2015)

J.M.Mueller, M.W.Ahmed, B.J.Davis, H.J.Karwowski, D.M.Markoff, L.S.Myers, M.C.Spraker, S.Stave, J.R.Tompkins, H.R.Weller, W.R.Zimmerman

Polarization asymmetries in the 9Be (γ, n0)reaction

NUCLEAR REACTIONS 9Be(polarized γ, n), E=5.5-15.5 MeV from High Intensity γ-ray Source (HIγS) at Duke University and TUNL; measure neutron spectra, time-of-flight spectrum, neutron yields parallel and perpendicular to the plane of beam polarization, polarization asymmetries using nearly 100% linearly polarized and monoenergetic γ-ray beam. Comparison with direct capture calculations using only E1 contributions. Relevance to new method of assaying special nuclear materials (SNM).

doi: 10.1103/PhysRevC.92.034604
Citations: PlumX Metrics


2014MU01      Phys.Rev. C 89, 034615 (2014)

J.M.Mueller, M.W.Ahmed, R.H.France, M.S.Johnson, H.J.Karwowski, L.S.Myers, J.Randrup, M.H.Sikora, M.C.Spraker, S.Stave, J.R.Tompkins, R.Vogt, H.R.Weller, C.S.Whisnant, W.R.Zimmerman

Prompt neutron polarization asymmetries in photofission of 232Th, 233, 235, 238U, 237Np, and 239, 240Pu

NUCLEAR REACTIONS 232Th, 233,235,238U, 237Np, 239,240Pu(polarized γ, F), E=5.3-7.6 MeV; measured E(n), I(n), time-of flight spectrum, angular distribution, and polarization asymmetry of prompt neutrons generated by fission, θ(fragment) at HIγS-TUNL facility; deduced angular distribution coefficients b and c, and compared with predicted values from FREYA computer code of event-by-event Monte Carlo prompt neutron+γ-ray emission calculation. Discussed differences in polarization asymmetries between the even-even actinides and odd-A actinides.

doi: 10.1103/PhysRevC.89.034615
Citations: PlumX Metrics


2013KA48      Nucl.Instrum.Methods Phys.Res. B316, 48 (2013)

A.Kafkarkou, M.W.Ahmed, P.H.Chu, R.H.France, H.J.Karwowski, D.P.Kendellen, G.Laskaris, I.Mazumdar, J.M.Mueller, L.S.Myers, R.M.Prior, M.H.Sikora, M.C.Spraker, H.R.Weller, W.R.Zimmerman

Study of the 10B(p, α) reaction between 2.1 and 6.0 MeV

NUCLEAR REACTIONS 10B(p, α), E=2.1-6 MeV; measured reaction products, Eα, Iα; deduced σ(θ), S-factors and their uncertainties. Comparison with available data.

doi: 10.1016/j.nimb.2013.08.029
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2072.


2012SP03      J.Fus.Energy 31, 357 (2012)

M.C.Spraker, M.W.Ahmed, M.A.Blackston, N.Brown, R.H.France, S.S.Henshaw, B.A.Perdue, R.M.Prior, P.-N.Seo, S.Stave, H.R.Weller

The 11B(p, α)8Be → α + α and the 11B(α, α)11B Reactions at Energies Below 5.4 MeV

NUCLEAR REACTIONS 11B(p, α), E=0.15-3.8 MeV; 11B(α, α), E=2-5.4 MeV; measured reaction products, Eα, Iα; deduced σ(θ), Legendre polynomial fits. The Triangle Universities Nuclear Laboratory (TUNL), FN Tandem Van de Graaff and Mini-Tandem accelerators.

doi: 10.1007/s10894-011-9473-5
Citations: PlumX Metrics


2011ST01      Phys.Lett. B 696, 26 (2011)

S.Stave, M.W.Ahmed, R.H.France III, S.S.Henshaw, B.Muller, B.A.Perdue, R.M.Prior, M.C.Spraker, H.R.Weller

Understanding the 11B(p, α)αα reaction at the 0.675 MeV resonance

NUCLEAR REACTIONS 11B(p, α), E=2.64 MeV; measured Eα, Iα, α-α coin.; deduced implications on reaction model, astrophysical reaction rates.

doi: 10.1016/j.physletb.2010.12.015
Citations: PlumX Metrics

Data from this article have been entered in the XUNDL database. For more information, click here.


2008AH01      Phys.Rev. C 77, 044005 (2008)

M.W.Ahmed, M.A.Blackston, B.A.Perdue, W.Tornow, H.R.Weller, B.Norum, B.Sawatzky, R.M.Prior, M.C.Spraker

Near-threshold deuteron photodisintegration: An indirect determination of the Gerasimov-Drell-Hearn sum rule and forward spin polarizability (γ0) for the deuteron at low energies

NUCLEAR REACTIONS 2H(polarized γ, n)p, E=2.44, 2.60, 2.72 MeV; measured analyzing power, σ, photon asymmetry, angular distributions, neutron spectra by time-of-flight; deduced Gerasimov-Drell-Hearn sum rule integrand and sum rule integrand for forward spin polarizability. Compared with theoretical predictions.

doi: 10.1103/PhysRevC.77.044005
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetL0137.


2008ST10      Phys.Rev. C 77, 054607 (2008)

S.Stave, M.W.Ahmed, A.J.Antolak, M.A.Blackston, A.S.Crowell, B.L.Doyle, S.S.Henshaw, C.R.Howell, P.Kingsberry, B.A.Perdue, P.Rossi, R.M.Prior, M.C.Spraker, H.R.Weller

Cross section measurements of the 10B(d, n0)11C reaction below 160 keV

NUCLEAR REACTIONS 10B(d, n)11C, E<160 keV; measured σ, astrophysical S factors, neutron spectra, angular distributions. Comparison with DWBA and Hauser-Feshbach calculations.

doi: 10.1103/PhysRevC.77.054607
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC1626.


2006PA27      Phys.Rev. C 74, 015804 (2006); Erratum Phys.Rev. C 74, 029903 (2006)

Y.Parpottas, M.W.Ahmed, M.A.Blackston, R.H.France III, B.A.Perdue, R.M.Prior, A.Sabourov, M.C.Spraker, H.R.Weller

Astrophysical S factor for the 11B(d, n)12C reaction below 135 keV

NUCLEAR REACTIONS 11B(d, n), E=120-160 keV; measured En, yields, angular distributions; deduced astrophysical S-factors.

doi: 10.1103/PhysRevC.74.015804
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC1503.


2006SA03      Phys.Rev. C 73, 015801 (2006)

A.Sabourov, M.W.Ahmed, M.A.Blackston, A.S.Crowell, C.R.Howell, B.A.Perdue, K.Sabourov, A.Tonchev, H.R.Weller, R.M.Prior, M.C.Spraker

Astrophysical S factor for the 7Li(d, n0)8Be and 7Li(d, n1)8Be reactions

NUCLEAR REACTIONS 7Li(d, n), E=45, 60, 80 keV; measured neutron spectra, σ(E); deduced integrated yields, astrophysical S-factor.

doi: 10.1103/PhysRevC.73.015801
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC1408.


2006SA49      Phys.Rev.C 74, 064611 (2006)

A.Sabourov, M.W.Ahmed, M.A.Blackston, A.S.Crowell, C.R.Howell, K.Joshi, S.O.Nelson, B.A.Perdue, K.Sabourov, A.Tonchev, H.R.Weller, R.M.Prior, M.C.Spraker, B.Braizinha, N.Kalantar-Nayestanaki

The 7Li(d(pol), n0)8Be and 7Li(d(pol), n1)8Be reactions below 160 keV

NUCLEAR REACTIONS 7Li(polarized d, n), E=80, 130, 160 keV; measured σ(E, θ), analyzing powers; deduced transition matrix elements. Finite-range DWBA calculations, coupled reaction channels calculations.

doi: 10.1103/PhysRevC.74.064611
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC1529.


2004PE24      Phys.Rev. C 70, 064305 (2004)

B.A.Perdue, M.W.Ahmed, A.P.Tonchev, H.R.Weller, G.Feldman, V.N.Litvinenko, I.V.Pinayev, B.E.Norum, R.M.Prior, M.C.Spraker, B.D.Sawatzky

Compton scattering of polarized γ rays by 16O for Eγ = 25-40 MeV

NUCLEAR REACTIONS 16O(polarized γ, γ'), E=25-40 MeV; measured polarization asymmetries; deduced resonance features.

doi: 10.1103/PhysRevC.70.064305
Citations: PlumX Metrics


2004PR09      Phys.Rev. C 70, 055801 (2004)

R.M.Prior, M.C.Spraker, A.M.Amthor, K.J.Keeter, S.O.Nelson, A.Sabourov, K.Sabourov, A.Tonchev, M.Ahmed, J.H.Kelley, D.R.Tilley, H.R.Weller, H.M.Hofmann

Energy dependence of the astrophysical S factor for the 6Li(p, γ)7Be reaction

NUCLEAR REACTIONS 6Li(polarized p, γ), E=80, 95, 110, 120, 130 keV; measured Eγ, Iγ, analyzing power; deduced energy dependence of astrophysical S-factor.

doi: 10.1103/PhysRevC.70.055801
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC1136.


2004SA61      Phys.Rev. C 70, 064601 (2004)

K.Sabourov, M.W.Ahmed, R.S.Canon, B.Crowley, K.Joshi, J.H.Kelley, S.O.Nelson, B.A.Perdue, E.C.Schreiber, A.Sabourov, A.Tonchev, H.R.Weller, E.A.Wulf, R.M.Prior, M.C.Spraker, H.M.Hofmann, M.Trini

Experimental and theoretical study of the 2H(d(pol), γ)4He reaction below Ec.m.=60keV

NUCLEAR REACTIONS 2H(polarized d, γ), E<115 keV; measured Eγ, Iγ, σ(θ), Ay(θ), T20(θ); deduced transition matrix elements. Comparison with resonating group model predictions.

doi: 10.1103/PhysRevC.70.064601
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC1493.


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