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NSR database version of April 26, 2024.

Search: Author = D.S.Armstrong

Found 30 matches.

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2021SU25      Nat.Phys. 17, 687 (2021), Erratum Nat.Phys. 18, 473 (2022)

V.Sulkosky, C.Peng, J.Chen, A.Deur, S.Abrahamyan, K.A.Aniol, D.S.Armstrong, T.Averett, S.L.Bailey, A.Beck, P.Bertin, F.Butaru, W.Boeglin, A.Camsonne, G.D.Cates, C.-C.Chang, S.Choi, E.Chudakov, L.Coman, J.C.Cornejo, B.Craver, F.Cusanno, R.De Leo, C.W.de Jager, J.D.Denton, S.Dhamija, R.Feuerbach, J.M.Finn, S.Frullani, K.Fuoti, H.Gao, F.Garibaldi, O.Gayou, R.Gilman, A.Glamazdin, C.Glashausser, J.Gomez, J.-O.Hansen, D.Hayes, F.W.Hersman, D.W.Higinbotham, T.Holmstrom, T.B.Humensky, C.E.Hyde, H.Ibrahim, M.Iodice, X.Jiang, L.J.Kaufman, A.Kelleher, K.E.Keister, W.Kim, A.Kolarkar, N.Kolb, W.Korsch, K.Kramer, G.Kumbartzki, L.Lagamba, V.Laine, G.Laveissiere, J.J.Lerose, D.Lhuillier, R.Lindgren, N.Liyanage, H.-J.Lu, B.Ma, D.J.Margaziotis, P.Markowitz, K.R.McCormick, M.Meziane, Z.-E.Meziani, R.Michaels, B.Moffit, P.Monaghan, S.Nanda, J.Niedziela, M.Niskin, R.Pandolfi, K.D.Paschke, M.Potokar, A.Puckett, V.A.Punjabi, Y.Qiang, R.D.Ransome, B.Reitz, R.Roche, A.Saha, A.Shabetai, S.Sirca, J.T.Singh, K.Slifer, R.Snyder, P.Solvignon, R.Stringer, R.Subedi, W.A.Tobias, N.Ton, P.E.Ulmer, G.M.Urciuoli, A.Vacheret, E.Voutier, K.Wang, L.Wan, B.Wojtsekhowski, S.Woo, H.Yao, J.Yuan, X.Zhan, X.Zheng, L.Zhu

Measurement of the generalized spin polarizabilities of the neutron in the low-Q² region

NUCLEAR REACTIONS ³He(polarized e^-, e^-), E=1.1-4.4 GeV; measured reaction products, Eβ, Iβ. ¹NN; deduced transverse-transverse and longitudinal-transverse interference σ, generalized neutron spin polarizabilities. Comparison with chiral effective field theory calculations.

doi: 10.1038/s41567-021-01245-9
Citations: PlumX Metrics

2007AR23      Phys.Rev.Lett. 99, 092301 (2007)

D.S.Armstrong, and the G0 Collaboration

Transverse Beam Spin Asymmetries in Forward-Angle Elastic Electron-Proton Scattering

doi: 10.1103/PhysRevLett.99.092301
Citations: PlumX Metrics

2007AR28      Eur.Phys.J. A 32, 451 (2007)

D.S.Armstrong, for the HAPPEX Collaboration

New results from the HAPPEX Experiments at Q² = 0.1 GeV/c²

doi: 10.1140/epja/i2006-10394-y
Citations: PlumX Metrics

2007TR05      Phys.Rev. C 75, 064603 (2007)

S.Tripathi, D.S.Armstrong, M.E.Christy, J.H.D.Clark, T.P.Gorringe, M.D.Hasinoff, M.A.Kovash, D.H.Wright, P.A.Zolnierczuk

Double radiative pion capture on hydrogen and deuterium and the nucleon's pion cloud

doi: 10.1103/PhysRevC.75.064603
Citations: PlumX Metrics

2005AR21      Phys.Rev.Lett. 95, 092001 (2005)

D.S.Armstrong, and the G0 Collaboration

Strange-Quark Contributions to Parity-Violating Asymmetries in the Forward G0 Electron-Proton scattering Experiment

NUCLEAR REACTIONS ¹H(e, e), E=3.03 GeV; measured forward angle parity-violating asymmetries, strange-quark contributions.

doi: 10.1103/PhysRevLett.95.092001
Citations: PlumX Metrics

2005KR14      Phys.Rev.Lett. 95, 142002 (2005)

K.Kramer, D.S.Armstrong, T.D.Averett, W.Bertozzi, S.Binet, C.Butuceanu, A.Camsonne, G.D.Cates, J.-P.Chen, S.Choi, E.Chudakov, F.Cusanno, A.Deur, P.Djawotho, D.Dutta, J.M.Finn, H.Gao, F.Garibaldi, O.Gayou, R.Gilman, A.Glamazdin, V.Gorbenko, K.A.Griffioen, J.-O.Hansen, D.W.Higinbotham, W.Hinton, T.Horn, C.W.de Jager, X.Jiang, W.Korsch, J.LeRose, D.Lhuillier, N.Liyanage, D.J.Margaziotis, K.McCormick, Z.-E.Meziani, R.Michaels, B.Milbrath, B.Moffit, S.Nanda, C.F.Perdrisat, R.Pomatsalyuk, V.Punjabi, B.Reitz, J.Roche, R.Roche, M.Roedelbronn, N.Savvinov, J.Secrest, J.Singh, S.Sirca, K.Slifer, P.Solvignon, D.J.Steiner, R.Suleiman, V.Sulkosky, A.Tobias, A.Vacheret, Y.Xiao, X.Zheng, J.Zhou, L.Zhu, X.Zhu, P.A.Zolnierczuk

Q² Dependence of the Neutron Spin Structure Function gⁿ₂ at Low Q²

NUCLEAR REACTIONS ³He(polarized e, e'), E=3.465-5.727 GeV; measured parallel and perpendicular cross section differences. ¹n, ³He deduced momentum transfer dependence of spin structure function.

doi: 10.1103/PhysRevLett.95.142002
Citations: PlumX Metrics

2004ZO04      Phys.Lett. B 597, 131 (2004)

P.A.Zolnierczuk, D.S.Armstrong, E.Christy, J.H.D.Clark, T.P.Gorringe, M.D.Hasinoff, M.A.Kovash, S.Tripathi, D.H.Wright

Search for exotic baryons in double radiative capture on pionic hydrogen

NUCLEAR REACTIONS ¹H(π^-, γ), E at rest; measured Eγ, Iγ, γγ-coin; deduced branching ratio upper limit for exotic baryon production.

doi: 10.1016/j.physletb.2004.07.008
Citations: PlumX Metrics

2002AR19      Phys.Rev. C 66, 065501 (2002)

S.Arole, D.S.Armstrong, T.P.Gorringe, M.D.Hasinoff, M.A.Kovash, V.Kuzmin, B.A.Moftah, R.Sedlar, T.J.Stocki, T.Tetereva

Muon capture on ³⁵Cl

NUCLEAR REACTIONS ³⁵Cl(μ^-, ν), E at rest; measured Eγ, Iγ; deduced capture rate, hyperfine dependences, γ-ν correlation coefficients. Comparison with model predictions.

doi: 10.1103/PhysRevC.66.065501
Citations: PlumX Metrics

2002TR17      Phys.Rev.Lett. 89, 252501 (2002)

S.Tripathi, D.S.Armstrong, M.E.Christy, J.H.D.Clark, T.P.Gorringe, M.D.Hasinoff, M.A.Kovash, D.W.Wright, P.A.Zolnierczuk

Observation of Double Radiative Capture on Pionic Hydrogen

NUCLEAR REACTIONS ¹H(π^-, 2γ), E at 81.5 MeV/c; measured Eγ, γγ-coin, angular distributions; deduced branching ratio for double radiative capture.

doi: 10.1103/PhysRevLett.89.252501
Citations: PlumX Metrics

1999BE16      Phys.Rev. C59, 2853 (1999)

P.C.Bergbusch, D.S.Armstrong, M.Blecher, C.Q.Chen, B.C.Doyle, T.P.Gorringe, P.Gumplinger, M.D.Hasinoff, G.Jonkmans, J.A.Macdonald, J.-M.Poutissou, R.Poutissou, C.N.Sigler, D.H.Wright

Radiative Muon Capture on O, Al, Si, Ti, Zr, and Ag

NUCLEAR REACTIONS O, ²⁷Al, Si, Ti, Zr, Ag(μ^-, γ), E at rest; measured branching ratio for radiative capture; deduced ratio of weak pseudoscaler to axial coupling constants.

doi: 10.1103/PhysRevC.59.2853
Citations: PlumX Metrics

1999GO23      Phys.Rev. C60, 055501 (1999)

T.P.Gorringe, D.S.Armstrong, S.Arole, M.Boleman, E.Gete, V.Kuzmin, B.A.Moftah, R.Sedlar, T.J.Stocki, T.Tetereva

Measurement of Partial Muon Capture Rates in 1s-0d Shell Nuclei

NUCLEAR REACTIONS ²⁴Mg, ²⁸Si, ³¹P, ³²S(μ^-, γ), (μ^-, ν), E at rest; measured Eγ, Iγ, γ-ray yields, capture rates; deduced effective axial coupling. Comparisons with shell model predictions, previous data.

doi: 10.1103/PhysRevC.60.055501
Citations: PlumX Metrics

1998GO18      Phys.Rev. C58, 1767 (1998)

T.P.Gorringe, D.S.Armstrong, C.Q.Chen, E.Christy, B.C.Doyle, P.Gumplinger, H.W.Fearing, M.D.Hasinoff, M.A.Kovash, D.H.Wright

Isotope Dependence of Radiative Muon Capture on the ^{58, 60, 62}Ni Isotopes

NUCLEAR REACTIONS ^58,60,62Ni(μ^-, ν), E at 63 MeV/c; measured Eγ, Iγ, radiative capture branching ratios; deduced weak pseudoscalar coupling constant. Comparison with Fermi gas model.

doi: 10.1103/PhysRevC.58.1767
Citations: PlumX Metrics

1998WR01      Phys.Rev. C57, 373 (1998)

D.H.Wright, S.Ahmad, D.S.Armstrong, G.Azuelos, W.Bertl, M.Blecher, C.Q.Chen, P.Depommier, B.C.Doyle, T.von Egidy, T.P.Gorringe, P.Gumplinger, M.D.Hasinoff, D.Healey, G.Jonkmans, A.J.Larabee, J.A.Macdonald, S.C.McDonald, M.Munro, J.-M.Poutissou, R.Poutissou, B.C.Robertson, D.G.Sample, E.Saettler, C.N.Sigler, G.N.Taylor, N.S.Zhang

Measurement of the Induced Pseudoscalar Coupling using Radiative Muon Capture on Hydrogen

NUCLEAR REACTIONS ¹H(μ^-, n), E at 63 MeV/c; measured Eγ, Iγ; deduced radiative muon capture branching ratio, weak pseudoscalar coupling.

doi: 10.1103/PhysRevC.57.373
Citations: PlumX Metrics

1997MO11      Phys.Lett. 395B, 157 (1997)

B.A.Moftah, E.Gete, D.F.Measday, D.S.Armstrong, J.Bauer, T.P.Gorringe, B.L.Johnson, B.Siebels, S.Stanislaus

Muon Capture in ²⁸Si and g(p)/g(a)

NUCLEAR REACTIONS ²⁸Si(μ^-, ν), E at rest; measured νγ(θ); deduced angular correlation coefficient, g(p)/g(a).

doi: 10.1016/S0370-2693(97)00081-6
Citations: PlumX Metrics

1996AB32      Nucl.Phys. A609, 562 (1996); Erratum Nucl.Phys. A625, 899 (1997)

A.Abele, J.Adomeit, D.S.Armstrong, C.A.Baker, C.J.Batty, M.Benayoun, A.Berdoz, K.Beuchert, S.Bischoff, P.Blum, K.Braune, D.V.Bugg, T.Case, A.R.Cooper, O.Cramer, K.M.Crowe, H.P.Dietz, N.Djaoshvili, W.Dunnweber, D.Engelhardt, M.Englert, M.A.Faessler, R.P.Haddock, F.H.Heinsius, M.Herz, N.P.Hessey, P.Hidas, C.Holtzhaussen, P.Illinger, D.Jamnik, B.Kammle, P.Kammel, T.Kiel, H.Koch, C.Kolo, M.Lakata, H.Matthay, R.McCrady, J.Meier, C.A.Meyer, L.Montanet, C.N.Pinder, G.Pinter, C.Regenfus, J.Reissmann, W.Rothel, P.Schmidt, I.Scott, R.Seibert, C.Strassburger, U.Strohbusch, M.Suffert, U.Thoma, M.Tischhauser, C.Volcker, D.Walther, B.Zou

Further Analysis of (p-bar)p → 3π⁰, ηηπ⁰ and ηπ⁰π⁰ at Rest

NUCLEAR REACTIONS ¹H(p-bar, X), E at rest; analyzed 3π⁰, 2ηπ⁰, η2π⁰ production data; deduced f₀, f₂ resonances, widths.

doi: 10.1016/S0375-9474(96)00306-5
Citations: PlumX Metrics

1996AR31      Hyperfine Interactions 103, 169 (1996)

D.S.Armstrong, J.Bauer, J.Evans, T.P.Gorringe, B.L.Johnson, S.Kalvoda, R.Porter, B.Siebels, E.Gete, D.F.Measday, B.A.Moftah, S.Stanislaus

Muon Capture by Silicon 28

NUCLEAR REACTIONS ²⁸Si(μ^-, γ), E at rest; measured Eγ, Iγ; deduced nuclear recoil, γν-correlation coefficient.

1996JO21      Phys.Rev. C54, 2714 (1996)

B.L.Johnson, T.P.Gorringe, D.S.Armstrong, J.Bauer, M.D.Hasinoff, M.A.Kovash, D.F.Measday, B.A.Moftah, R.Porter, D.H.Wright

Observables in Muon Capture on ²³Na and the Effective Weak Couplings g(∼)(a) and g(∼)(p)

NUCLEAR REACTIONS ²³Na(μ^-, X), E at rest; measured γ spectra, yield after residuals decay. ^23,22,21,20Ne, ²⁰F levels deduced capture rates, hyperfine dependence.

doi: 10.1103/PhysRevC.54.2714
Citations: PlumX Metrics

1996JO22      Phys.Rev.Lett. 77, 4512 (1996)

G.Jonkmans, S.Ahmad, D.S.Armstrong, G.Azuelos, W.Bertl, M.Blecher, C.Q.Chen, P.Depommier, B.C.Doyle, T.von Egidy, T.P.Gorringe, P.Gumplinger, M.D.Hasinoff, D.Healey, A.J.Larabee, J.A.Macdonald, S.C.McDonald, M.Munro, J.-M.Poutissou, R.Poutissou, B.C.Robertson, D.G.Sample, E.Saettler, C.M.Sigler, G.N.Taylor, D.H.Wright, N.S.Zhang

Radiative Muon Capture on Hydrogen and the Induced Pseudoscalar Coupling

NUCLEAR REACTIONS ¹H(μ^-, γ), E at rest; measured photons partial branching ratio; deduced weak pseudoscalar coupling constant, related features.

doi: 10.1103/PhysRevLett.77.4512
Citations: PlumX Metrics

1994GO07      Phys.Rev.Lett. 72, 3472 (1994)

T.P.Gorringe, B.L.Johnson, D.S.Armstrong, J.Bauer, M.A.Kovash, M.D.Hasinoff, D.F.Measday, B.A.Moftah, R.Porter, D.H.Wright

Hyperfine Effect in μ^- Capture on ²³Na and g(p)/g(a)

NUCLEAR REACTIONS ²³Na(μ^-, γ), E at rest; measured capture rates, hyperfine transition rate in Na metal; deduced (g(p)/g(a)).

ATOMIC PHYSICS ²³Na(μ^-, γ), E at rest; measured capture rates, hyperfine transition rate in Na metal; deduced (g(p)/g(a)).

doi: 10.1103/PhysRevLett.72.3472
Citations: PlumX Metrics

1993GO09      Phys.Lett. 309B, 241 (1993)

T.P.Gorringe, B.L.Johnson, J.Bauer, M.A.Kovash, R.Porter, P.Gumplinger, M.D.Hasinoff, D.F.Measday, B.A.Moftah, D.S.Armstrong, D.H.Wright

Measurement of Hyperfine Transition Rates in Muonic ¹⁹F, ²³Na, ³¹P, and (nat)Cl

NUCLEAR REACTIONS ¹⁹F, ²³Na, Cl(μ^-, ν), E at rest; measured capture transitions time spectra; deduced hyperfine transition rates.

ATOMIC PHYSICS, Mesic-Atoms ¹⁹F, ²³Na, Cl(μ^-, ν), E at rest; measured capture transitions time spectra; deduced hyperfine transition rates.

doi: 10.1016/0370-2693(93)90927-A
Citations: PlumX Metrics

1993GO27      Nucl.Instrum.Methods Phys.Res. B79, 303 (1993)

T.P.Gorringe, J.Bauer, B.L.Johnson, M.A.Kovash, R.Porter, P.Gumplinger, M.D.Hasinoff, D.F.Measday, B.Moftah, D.S.Armstrong, D.H.Wright

Measurement of the Hyperfine Transition Rates in μ^- F, Na, Al, P, and Cl, and the Hyperfine Dependence of μ^- Capture

NUCLEAR MOMENTS ¹⁹F, ²³Na, ²⁷Al, ³¹P, ^35,37Cl; measured hyperfine transition rates following muon capture.

doi: 10.1016/0168-583X(93)95350-E
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1992AR14      Phys.Rev. C46, 1094 (1992)

D.S.Armstrong, A.Serna-Angel, S.Ahmad, G.Azuelos, W.Bertl, M.Blecher, C.Q.Chen, P.Depommier, T.von Egidy, T.P.Gorringe, M.D.Hasinoff, R.S.Henderson, A.J.Larabee, J.A.Macdonald, S.C.McDonald, J.-M.Poutissou, R.Poutissou, B.C.Robertson, D.G.Sample, G.N.Taylor, D.H.Wright, N.S.Zhang

Radiative Muon Capture on Al, Si, Ca, Mo, Sn, and Pb

NUCLEAR REACTIONS ²⁷Al, ²⁸Si, ⁴⁰Ca, Mo, Sn, Pb(μ^-, γ), E at rest; measured γ yield; deduced induced pseudoscalar coupling constant (g(p)).

doi: 10.1103/PhysRevC.46.1094
Citations: PlumX Metrics

1992BE70      Z.Phys. C56, S150 (1992)

W.Bertl, S.Ahmad, D.S.Armstrong, G.Azuelos, M.Blecher, C.Q.Chen, P.Depommier, P.Gumplinger, T.P.Gorringe, M.D.Hasinoff, R.Henderson, G.Jonkmans, A.J.Larabee, J.A.Macdonald, S.C.McDonald, J.-M.Poutissou, R.Poutissou, B.C.Robertson, D.G.Sample, W.Schott, G.N.Taylor, T.von Egidy, D.H.Wright, N.S.Zhang

Radiative muon capture on hydrogen

NUCLEAR REACTIONS ¹H(π^-, γ), (π^-, π⁰), (μ^-, X), (μ⁺, X), E at rest; measured Eγ, Iγ.

doi: 10.1007/BF02426790
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1991AR02      Phys.Rev. C43, 1425 (1991)

D.S.Armstrong, S.Ahmad, R.A.Burnham, T.P.Gorringe, M.D.Hasinoff, A.J.Larabee, C.E.Waltham, G.Azuelos, J.A.Macdonald, T.Numao, J.-M.Poutissou, M.Blecher, D.H.Wright, E.T.H.Clifford, J.Summhammer, P.Depommier, R.Poutissou, H.Mes, B.C.Robertson

Radiative Muon Capture on Carbon, Oxygen, and Calcium

NUCLEAR REACTIONS ¹²C, ¹⁶O, ⁴⁰Ca(μ^-, γ), E at rest; measured Eγ, Iγ; deduced g(p)/g(a).

doi: 10.1103/PhysRevC.43.1425
Citations: PlumX Metrics

1990AZ05      Ann.Phys.(Paris) 15, 13 (1990)

G.Azuelos, S.Ahmad, D.S.Armstrong, W.Bertl, M.Blecher, R.A.Burnham, C.-Q.Chen, P.Depommier, T.von Egidy, T.P.Gorringe, M.D.Hasinoff, R.Henderson, A.J.Larabee, J.A.MacDonald, S.C.McDonald, J.-M.Poutissou, R.Poutissou, B.C.Robertson, A.Serna-Angel, G.N.Taylor, C.E.Waltham, D.H.Wright, N.-S.Zhang

Capture Radiative des Muons sur les Noyaux et le Proton

NUCLEAR REACTIONS ¹H(μ^-, ν), E at rest; analyzed capture reaction data; deduced g(P) inference features.

1989AR07      Phys.Rev. C40, R1100 (1989)

D.S.Armstrong, S.Ahmad, R.A.Burnham, T.P.Gorringe, M.D.Hasinoff, A.J.Larabee, C.E.Waltham, G.Azuelos, J.A.Macdonald, J.-M.Poutissou, M.Blecher, D.H.Wright, E.T.H.Clifford, J.Summhammer, P.Depommier, R.Poutissou, H.Mes, B.C.Robertson

Radiative Muon Capture on Oxygen and the Induced Pseudoscalar Coupling

NUCLEAR REACTIONS ¹⁶O(μ^-, γ), E at rest; measured γ spectrum. ¹⁶O deduced (gp/ga).

doi: 10.1103/PhysRevC.40.R1100
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1989GO17      Phys.Rev. C40, 2390 (1989)

T.P.Gorringe, S.Ahmad, D.S.Armstrong, R.A.Burnham, M.D.Hasinoff, A.J.Larabee, C.E.Waltham, G.Azuelos, J.A.Macdonald, J.-M.Poutissou, M.Blecher, D.H.Wright, P.Depommier, R.Poutissou, E.T.H.Clifford

Search for the Tetraneutron using the Reaction ⁴He(π^-, π⁺)⁴n

NUCLEAR REACTIONS ⁴He(π^-, π⁺), E=80 MeV; measured pion momentum spectra; deduced tetraneutron production σ upper limit.

doi: 10.1103/PhysRevC.40.2390
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1989ST01      Phys.Rev. C39, 295 (1989)

S.Stanislaus, D.S.Armstrong, D.F.Measday

Search for the Spontaneous Emission of Pions

RADIOACTIVITY Pb, ²⁰⁹Bi, ²³²Th, ^238,235U, ²⁵²Cf; measured π⁰ production limit; deduced branching ratio limit relative to SF-decay.

doi: 10.1103/PhysRevC.39.295
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1989ST03      Phys.Lett. 219B, 237 (1989)

S.Stanislaus, D.S.Armstrong, D.F.Measday, P.Weber, M.Harston

Search for T = 2 Dibaryons via π^-d → γX

NUCLEAR REACTIONS ²H(π^-, X), E at rest; measured γ-yields; deduced no T=2 dibaryon evidence.

ATOMIC PHYSICS, Mesic-Atoms ²H(π^-, X), E at rest; measured γ-yields; deduced π^-d mesic atom transition branching ratio limit.

doi: 10.1016/0370-2693(89)90384-5
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1985AR14      Nucl.Phys. A441, 397 (1985)

D.S.Armstrong, S.K.Saha, C.-W.Cheng, E.Adamides, A.Henrikson, M.A.Lone, B.C.Robertson

Gamma-Ray Strength Function of ¹⁹⁸Hg

NUCLEAR REACTIONS, ICPND ¹⁹⁷Au(p, γ), E=4 MeV; measured σ(Eγ); deduced γ-production σ. ¹⁹⁸Hg deduced E1 γ-strength function. Natural target.

doi: 10.1016/0375-9474(85)90152-6
Citations: PlumX Metrics
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