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Search: Author = D.Barlow

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2017SE02      Phys.Rev. C 95, 015501 (2017)

S.J.Seestrom, E.R.Adamek, D.Barlow, M.Blatnik, L.J.Broussard, N.B.Callahan, S.M.Clayton, C.Cude-Woods, S.Currie, E.B.Dees, W.Fox, M.Hoffbauer, K.P.Hickerson, A.T.Holley, C.-Y.Liu, M.Makela, J.Medina, D.J.Morley, C.L.Morris, R.W.Pattie, J.Ramsey, A.Roberts, D.J.Salvat, A.Saunders, E.I.Sharapov, S.K.L.Sjue, B.A.Slaughter, P.L.Walstrom, Z.Wang, J.Wexler, T.L.Womack, A.R.Young, J.Vanderwerp, B.A.Zeck

Total cross sections for ultracold neutrons scattered from gases

NUCLEAR REACTIONS ¹H, ³He(n, n'), E=ultracold neutrons; measured scattered neutrons, transmission ratio as a function of pressure, total cross sections, total cross section as a function of the number of hydrogen atoms using the following gas targets: hydrogen, ethane, methane, isobutene, n-butane, ethylene, water vapor, propane, neopentane, isopropyl alcohol, and ³He; deduced cross section per hydrogen atom as a function of molecular mass. Relevance to ongoing experiments pn neutron half-life measurements using ultracold neutrons (UCN) at LANL facility.

doi: 10.1103/PhysRevC.95.015501
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2015SE18      Phys.Rev. C 92, 065501 (2015)

S.J.Seestrom, E.R.Adamek, D.Barlow, L.J.Broussard, N.B.Callahan, S.M.Clayton, C.Cude-Woods, S.Currie, E.B.Dees, W.Fox, P.Geltenbort, K.P.Hickerson, A.T.Holley, C.-Y.Liu, M.Makela, J.Medina, D.J.Morley, C.L.Morris, J.Ramsey, A.Roberts, D.J.Salvat, A.Saunders, E.I.Sharapov, S.K.L.Sjue, B.A.Slaughter, B.VornDick, P.L.Walstrom, Z.Wang, T.L.Womack, A.R.Young, B.A.Zeck, for the UCN|t Collaboration

Upscattering of ultracold neutrons from gases

NUCLEAR REACTIONS ^1,2H, C, F, N, Ne, Ar, Xe(n, n'), E=UCNs from Los Alamos Neutron Science Center (LANSCE) ultracold neutron source; measured Eγ, Iγ, E(n), I(n), upscattered cross sections for room temperature gas targets of hydrogen, deuterium, nitrogen, neon, argon, xenon, C₄H₁₀, CF₄, and air. Comparison with experimental values for higher neutron energies, and with theoretical calculations. Relevance to measurement of the half-life of free neutron decay at LANSCE using a magnetogravitational trap.

doi: 10.1103/PhysRevC.92.065501
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2014SA31      Phys.Rev. C 89, 052501 (2014)

D.J.Salvat, E.R.Adamek, D.Barlow, J.D.Bowman, L.J.Broussard, N.B.Callahan, S.M.Clayton, C.Cude-Woods, S.Currie, E.B.Dees, W.Fox, P.Geltenbort, K.P.Hickerson, A.T.Holley, C.-Y.Liu, M.Makela, J.Medina, D.J.Morley, C.L.Morris, S.I.Penttila, J.Ramsey, A.Saunders, S.J.Seestrom, E.I.Sharapov, S.K.L.Sjue, B.A.Slaughter, J.Vanderwerp, B.VornDick, P.L.Walstrom, Z.Wang, T.L.Womack, A.R.Young

Storage of ultracold neutrons in the magneto-gravitational trap of the UCN_T experiment

RADIOACTIVITY ¹n(β^-); measured mean storage times of ultracold neutrons (UCN) in a magneto-gravitational trap at the LANSCE-LANL UCN source, with and without activation of the field; discussed half-life of neutron decay, and systematic effects.

doi: 10.1103/PhysRevC.89.052501
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1996DH01      Phys.Rev. C54, 2823 (1996)

K.S.Dhuga, B.L.Berman, W.J.Briscoe, R.W.Caress, S.K.Matthews, D.B.Barlow, B.M.K.Nefkens, C.Pillai, J.W.Price, S.J.Greene, I.Slaus, I.Supek

Investigation of Nuclear Charge Symmetry by Pion Elastic Scattering from ³H and ³He

NUCLEAR REACTIONS ³H, ³He(π⁺, π⁺), (π^-, π^-), E=180-295 MeV; measured σ(E, θ); deduced role of charge symmetry breaking in the pion-nucleus system.

doi: 10.1103/PhysRevC.54.2823
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1995BE04      Phys.Rev. C51, 1882 (1995)

B.L.Berman, G.C.Anderson, W.J.Briscoe, A.Mokhtari, A.M.Petrov, M.E.Sadler, D.B.Barlow, B.M.K.Nefkens, C.Pillai

Inelastic Pion Scattering from ³H and ³He

NUCLEAR REACTIONS ³H, ³He(π⁺, π⁺'), (π^-, π^-'), E=142, 180, 220 MeV; measured σ(θ(π), E(π)), ratios; deduced no violation of charge symmetry in inelastic channel. Comparison with electron, elastic pion scattering.

doi: 10.1103/PhysRevC.51.1882
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1995MA32      Phys.Rev. C51, 2534 (1995)

S.K.Matthews, W.J.Briscoe, C.Bennhold, B.L.Berman, R.W.Caress, K.S.Dhuga, S.N.Dragic, S.S.Kamalov, N.J.Nicholas, M.F.Taragin, L.Tiator, S.J.Greene, D.B.Barlow, B.M.K.Nefkens, C.Pillai, J.W.Price, L.D.Isenhower, M.E.Sadler, I.Slaus, I.Supek

Elastic Scattering of Pions from ³H and ³He into the Backward Hemisphere

NUCLEAR REACTIONS ³He, ³H(π⁺, π⁺), E=142-256 MeV; measured σ(θ).

doi: 10.1103/PhysRevC.51.2534
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1994BU09      Phys.Rev. C49, 2226 (1994)

G.Burleson, G.Blanpied, W.Cottingame, G.Daw, B.Park, K.K.Seth, D.Barlow, S.Iversen, M.Kaletka, H.Nann, A.Saha, D.Smith, R.P.Redwine, W.Burger, M.Farkhondeh, B.Saghai, R.Anderson

Negative Pion-Nucleus Elastic Scattering at 20 and 40 MeV

NUCLEAR REACTIONS ¹²C, ¹⁶O, ⁴⁸Ca, ⁹⁰Zr, ²⁰⁸Pb(π^-, π^-), E=20 MeV; ¹²C, ^16,18O, ⁴⁰Ca, ⁵⁸Ni, ²⁰⁸Pb(π^-, π^-), E=40 MeV; measured σ(θ); deduced optical model parameters. Range telescope.

doi: 10.1103/PhysRevC.49.2226
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1993BR03      Nucl.Phys. A553, 585c (1993)

W.J.Briscoe, D.B.Barlow, B.L.Berman, R.W.Caress, K.S.Dhuga, S.N.Dragic, S.J.Greene, L.D.Isenhower, D.Knowles, D.Macek, S.K.Matthews, A.Mokhtari, B.M.K.Nefkens, N.J.Nicholas, C.Pillai, J.W.Price, M.E.Sadler, I.Slaus, I.Supek, M.F.Taragin

π± Elastic and Inelastic Scattering from ³H and ³He

NUCLEAR REACTIONS ³H, ³He(π⁺, π⁺), (π⁺, π⁺'), (π^-, π^-), (π^-, π^-'), E=142-256 MeV; measured σ(θ). ³H, ³He deduced matter form factors differences.

doi: 10.1016/0375-9474(93)90663-I
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1993LA18      Nucl.Instrum.Methods Phys.Res. A325, 187 (1993)

J.Langenbrunner, M.B.Barakat, E.V.Hungerford III, C.T.Pillai, N.Tanaka, H.A.Thiessen, L.J.Rybarcyk, K.W.Jones, D.B.Barlow, J.B.McClelland, D.C.Dressman, S.C.Piltch, D.N.Mihailidis, J.B.Donahue, C.L.Morris, R.D.Werbeck

Pion Production at Small Angles

NUCLEAR REACTIONS C, Cu(p, xπ⁺), (p, xπ^-), E=800 MeV; measured pion production σ. Tof techniques.

doi: 10.1016/0168-9002(93)91020-N
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1993SU21      Phys.Rev. D47, 1762 (1993)

I.Supek, D.B.Barlow, W.J.Briscoe, J.F.Davis, G.J.Kim, D.W.Lane, A.Mokhtari, B.M.K.Nefkens, C.Pillai, M.E.Sadler, C.J.Seftor, M.F.Taragin, J.A.Wightman

Spin-Rotation Parameters A and R for π⁺p and π^-p Elastic Scattering from 427 to 657 MeV/c

NUCLEAR REACTIONS ¹H(π⁺, π⁺), (π^-, π^-), E at 427-657 MeV/c; measured spin rotation parameter, πp-coin. Polarized target.

doi: 10.1103/PhysRevD.47.1762
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1992BA03      Phys.Rev. C45, 293 (1992)

D.B.Barlow, B.M.K.Nefkens, C.Pillai, J.W.Price, I.Slaus, M.J.Wang, J.A.Wightman, K.W.Jones, M.J.Leitch, C.S.Mishra, C.L.Morris, J.-C.Peng, P.K.Teng, J.M.Tinsley

³He and ⁴He Production by 800 MeV Protons from ¹²C, Ti, and Pb at Forward Angles

NUCLEAR REACTIONS ¹²C, Ti, Pb(p, X)³He/⁴He, E=800 MeV; measured σ(θ) vs momentum for ^4,3He; deduced ^3,4He production σ ratio, reaction mechanism.

doi: 10.1103/PhysRevC.45.293
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1992GL02      Phys.Rev. C45, 35 (1992)

G.Glass, T.S.Bhatia, J.C.Hiebert, R.A.Kenefick, S.Nath, L.C.Northcliffe, W.B.Tippens, D.B.Barlow, J.J.Jarmer, J.E.Simmons, R.H.Jeppesen, G.E.Tripard

Measurement of Spin-Correlation Parameters A(LL) and A(SL) in p-p Elastic Scattering from 500 to 800 MeV

NUCLEAR REACTIONS ¹H(polarized p, p), E=500-800 MeV; measured spin correlation observables. Model, other data comparisons.

doi: 10.1103/PhysRevC.45.35
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1991PI03      Phys.Rev. C43, 1838 (1991)

C.Pillai, D.B.Barlow, B.L.Berman, W.J.Briscoe, A.Mokhtari, B.M.K.Nefkens, M.E.Sadler

Angle and Energy Dependence of the Superratio for π⁺ and π^- ELastic Scattering from ³H and ³He: Evidence for charge-symmetry violation

NUCLEAR REACTIONS ³H, ³He(π⁺, π⁺), (π^-, π^-), E=142-220 MeV; measured missing mass spectra, σ(ratio), σ(θ); deduced charge symmetry violation evidence. High pressure gas targets. Models comparison.

doi: 10.1103/PhysRevC.43.1838
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1990SE04      Phys.Rev. C41, 2800 (1990)

K.K.Seth, D.Barlow, S.Iversen, M.Kaletka, H.Nann, D.Smith, M.Artuso, G.Burleson, G.Blanpied, G.Daw, W.J.Burger, R.P.Redwine, B.Saghai, R.Anderson

Negative Pion-Nucleus Elastic Scattering at 30 and 50 MeV

NUCLEAR REACTIONS ^12,13C, ¹⁶O, ^40,48Ca, ⁹⁰Zr, ²⁰⁸Pb(π^-, π^-), E=30, 50 MeV; ¹²C, ⁴⁸Ca, ²⁰⁸Pb(π⁺, π⁺), E=50 MeV; measured σ(θ); deduced optical model fits. ¹³C, ⁴⁸Ca, ⁹⁰Zr, ²⁰⁸Pb enriched targets, range spectrometer. DWBA analysis.

doi: 10.1103/PhysRevC.41.2800
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1989BA08      Phys.Rev.Lett. 62, 1009 (1989)

D.B.Barlow, R.S.Kessler, G.J.Kim, B.M.K.Nefkens, C.Pillai, J.W.Price, J.A.Wightman, S.Hall, D.W.Lane, S.R.Loe, L.K.Morton, M.E.Sadler, S.D.Adrian, W.J.Briscoe, L.H.Kramer, A.Mokhtari, A.M.Petrov, C.J.Seftor, M.F.Taragin, J.F.Davis, I.Supek

Measurement of the Spin-Rotation Parameters A and R for π⁺p → π⁺p and π^-p → π^-p Scattering from 471 to 625 MeV/c

NUCLEAR REACTIONS ¹H(π⁺, π⁺), (π^-, π^-), E at 471-625 MeV/c; measured spin rotation parameters. Frozen spin polarized target.

doi: 10.1103/PhysRevLett.62.1009
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1989SE05      Phys.Rev. D39, 2457 (1989)

C.J.Seftor, S.D.Adrian, W.J.Briscoe, A.Mokhtari, M.F.Taragin, M.E.Sadler, D.B.Barlow, B.M.K.Nefkens, C.Pillai

Recoil-Proton Polarization in πp Elastic Scattering at 547 and 625 MeV/c

NUCLEAR REACTIONS ¹H(π⁺, π⁺), (π^-, π^-), E at 547, 625 MeV/c; measured recoil proton polarization.

doi: 10.1103/PhysRevD.39.2457
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1988BA14      Phys.Rev. C37, 1977 (1988)

D.B.Barlow, A.Saha, K.K.Seth, T.S.Bhatia, G.Glass, J.C.Hiebert, R.A.Kenefick, S.Nath, L.C.Northcliffe, W.B.Tippens, J.J.Jarmer, J.E.Simmons, R.H.Jeppesen, G.E.Tripard

Measurement of the Spin Correlation Parameters A(ll) and A(sl) for the Reaction pp → dπ⁺ in the Energy Region 500-800 MeV

NUCLEAR REACTIONS ¹H(polarized p, π⁺), E=500-800 MeV; measured spin correlation parameters; deduced no dibaryon resonances. Coupled-channels, partial wave analyses. Polarized target.

doi: 10.1103/PhysRevC.37.1977
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1988BA58      Nucl.Instrum.Methods Phys.Res. A271, 471 (1988)

D.B.Barlow, B.M.K.Nefkens, C.T.Pillai, K.W.Jones

Production of High Momentum Negative Pions by 800 MeV Protons at 0° to 20°

NUCLEAR REACTIONS ⁹Be, C(p, π^-), E=800 MeV; measured pion yield vs momentum.

doi: 10.1016/0168-9002(88)90307-5
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1988PI09      Phys.Lett. 207B, 389 (1988)

C.Pillai, D.B.Barlow, B.L.Berman, W.J.Briscoe, A.Mokhtari, B.M.K.Nefkens, A.M.Petrov, M.E.Sadler

A Study of Charge-Symmetry Violation in π⁺ and π^- Elastic Scattering from ³H and ³He

NUCLEAR REACTIONS ³H, ³He(π⁺, π⁺), (π^-, π^-), E=142, 180, 220 MeV; measured σ(θ), ratios; deduced charge symmetry violation mechanism.

doi: 10.1016/0370-2693(88)90670-3
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1987KA45      Phys.Lett. 199B, 336 (1987)

M.Kaletka, K.K.Seth, A.Saha, D.Barlow, D.Kielczewska

Correlation Effects in Pion Double Charge Exchange in the f_7/2 Shell

NUCLEAR REACTIONS ⁴⁸Ca, ⁴⁸Ti(π⁺, π^-), E=130, 180, 235, 292 MeV; measured σ(E(π)). ⁴⁸Ti, ⁴⁸Cr deduced analog, nonanalog transition σ ratios.

doi: 10.1016/0370-2693(87)90929-4
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1987SE05      Phys.Rev.Lett. 58, 1930 (1987)

K.K.Seth, M.Artuso, D.Barlow, S.Iversen, M.Kaletka, H.Nann, B.Parker, R.Soundranayagam

Exotic Nucleus Helium-9 and Its Excited States

NUCLEAR REACTIONS ⁹Be(π^-, π⁺), E at 180 MeV/c; measured missing-mass spectrum. ⁹He deduced mass excess, neutron binding energy, levels. Magnetic spectrometer, tof.

doi: 10.1103/PhysRevLett.58.1930
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1986SE04      Phys.Lett. 173B, 397 (1986)

K.K.Seth, S.Iversen, M.Kaletka, D.Barlow, A.Saha, R.Soundranayagam

Mass of Proton-Rich ⁵⁸Zn by Pion Double Charge Exchange

NUCLEAR REACTIONS ⁵⁸Ni(π⁺, π^-), E=292 MeV; measured missing mass spectra. ⁵⁸Zn deduced mass excess.

doi: 10.1016/0370-2693(86)90402-8
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1985GL02      Phys.Rev. C31, 288 (1985)

G.Glass, T.S.Bhatia, J.C.Hiebert, R.A.Kenefick, S.Nath, L.C.Northcliffe, W.B.Tippens, D.B.Barlow, A.Saha, K.K.Seth, J.G.J.Boissevain, J.J.Jarmer, J.E.Simmons, R.H.Jeppesen, G.E.Tripard

Measurements of Spin-Correlation Parameters A(LL) and A(SL) for p(pol)p(pol) → πd between 500 and 800 MeV

NUCLEAR REACTIONS ¹H(polarized p, π), E=500, 650, 800 MeV; measured spin correlation parameters vs θ.

doi: 10.1103/PhysRevC.31.288
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1985SE10      Phys.Lett. 155B, 339 (1985)

K.K.Seth, M.Kaletka, D.Barlow, D.Kielczewska, A.Saha, L.Casey, D.Godman, R.Seth, J.Stuart

Observation of Double Analog States in ⁸⁸Zr and ⁹⁰Mo and the Neutron Excess and Mass Systematics of Pion Double Charge Exchange

NUCLEAR REACTIONS ⁸⁸Sr, ⁹⁰Zr(π⁺, π^-), E=180, 292 MeV; measured σ(θ=5°), missing mass spectra; deduced neutron excess, mass systematics of reaction mechanism. ⁸⁸Zr, ⁹⁰Mo deduced double IAS excitation, energy, T.

doi: 10.1016/0370-2693(85)91583-7
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1985SE14      Phys.Lett. 158B, 23 (1985)

K.K.Seth, D.Barlow, A.Saha, R.Soundranayagam, S.Iversen, M.Kaletka, M.Bosko, D.Smith, G.W.Hoffmann, M.L.Barlett, R.Fergerson, J.McGill, E.C.Milner

Polarized Proton Inelastic Scattering from ⁴⁰Ca and ⁴⁸Ca at 500 MeV

NUCLEAR REACTIONS ^40,48Ca(polarized p, p'), E=500 MeV; measured σ(θ), analyzing power vs θ. ⁴⁰Ca(polarized p, p), E=500 MeV; analyzed spin rotation parameter vs θ; deduced optical potential parameters. ^40,48Ca deduced mass deformation parameters, lengths.

doi: 10.1016/0370-2693(85)90731-2
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1984HA29      Phys.Rev.Lett. 53, 152 (1984)

P.Harihar, K.K.Seth, D.Barlow, S.Iversen, M.Kaletka, H.Nann, A.Saha, C.F.Williamson, J.W.Wong, M.Deady, W.J.Gerace

Direct Verification of the Coexistence Model for ⁴⁰Ca: Electroexcitation of the second monopole state

NUCLEAR REACTIONS ⁴⁰Ca(e, e'), E=81.6-380 MeV; measured σ(E(e')), form factors. ⁴⁰Ca level deduced electroexcitation transition density.

doi: 10.1103/PhysRevLett.53.152
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1984SE04      Phys.Rev.Lett. 52, 894 (1984)

K.K.Seth, M.Kaletka, S.Iversen, A.Saha, D.Barlow, D.Smith, L.C.Liu

Core-Excitation Effects in Pion Double Charge Exchange

NUCLEAR REACTIONS ⁴²Ca(π⁺, π^-), E ≈ 125-300 MeV; measured σ(θ); deduced pion-nucleus potential characteristics. ⁴²Ca deduced ground state core excitation components. Optical model, first-, second-order one-body density terms.

doi: 10.1103/PhysRevLett.52.894
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1983SA19      Phys.Rev.Lett. 51, 759 (1983)

A.Saha, K.K.Seth, D.Kielczewska, S.Iversen, M.Kaletka, D.Barlow, D.Smith

Energy Variation of the Analyzing Power in the Reaction p(pol) + p → d + π⁺

NUCLEAR REACTIONS ¹H(polarized p, π⁺), E ≈ 550, 600, 650, 700, 800 MeV; measured analyzing power vs θ; deduced isobar dominance in pion production. Phenomenological analysis, other data input, Legendre polynomial fits.

doi: 10.1103/PhysRevLett.51.759
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1983SE13      Phys.Lett. 126B, 164 (1983)

K.K.Seth, A.Saha, D.Kielczewska, S.Iversen, M.Kaletka, D.Barlow, B.Hoistad

Analyzing Power for the p(pol) + p → d + π⁺ Reaction at 0.8 GeV and Effects of Dibaryon Admixtures

NUCLEAR REACTIONS ¹H(polarized p, π⁺), E=0.8 GeV; measured σ(θ(π)), analyzing power vs θ; deduced no dibaryon admixtures. Legendre polynomial analysis.

doi: 10.1016/0370-2693(83)90583-X
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1982SA15      Phys.Lett. 114B, 419 (1982)

A.Saha, K.K.Seth, D.Barlow, H.Nann, W.W.Jacobs

Measurement of the Relative Sign of Neutron and Proton Transition Matrix Elements of the 2⁺ States in ³⁰Si

NUCLEAR REACTIONS ³⁰Si(α, α'), E=120 MeV; measured σ(θ). ³⁰Si level deduced neutron, proton matrix element relative sign. DWBA analysis.

doi: 10.1016/0370-2693(82)90083-1
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1981HO26      Phys.Rev.Lett. 47, 1436 (1981)

G.W.Hoffmann, L.Ray, M.L.Barlett, R.Fergerson, J.McGill, E.C.Milner, K.K.Seth, D.Barlow, M.Bosko, S.Iversen, M.Kaletka, A.Saha, D.Smith

Elastic Scattering of 500-MeV Polarized Protons from ^40,48Ca, ⁹⁰Zr, and ²⁰⁸Pb, and Breakdown of the Impulse Approximation at Small Momentum Transfer

NUCLEAR REACTIONS ^40,48Ca, ⁹⁰Zr, ²⁰⁸Pb(polarized p, p), E=500 MeV; measured σ(θ), A(θ); deduced impulse approximation breakdown. Second-order. Kerman-McManus-Thaler optical potential.

doi: 10.1103/PhysRevLett.47.1436
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1980NA12      Phys.Lett. B96, 261 (1980)

H.Nann, K.K.Seth, S.G.Iversen, M.O.Kaletka, D.B.Barlow, D.Smith

Identification and Measurement of the Mass of ²⁶Ne(g.s.) by the ²⁶Mg(π^-, π⁺)²⁶Ne Reaction

NUCLEAR REACTIONS ²⁶Mg(π^-, π⁺), E=162.4 MeV; measured σ(E(π⁺)), Q. ²⁶Ne deduced level, mass excess.

doi: 10.1016/0370-2693(80)90762-5
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Note: The following list of authors and aliases matches the search parameter D.Barlow: , D.B.BARLOW