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NSR database version of April 26, 2024.

Search: Author = R.W.Dunford

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2007DU20      J.Phys.(London) G34, 2099 (2007)

R.W.Dunford, R.J.Holt

Parity violation in hydrogen revisited

doi: 10.1088/0954-3899/34/10/001
Citations: PlumX Metrics

2000AH03      Phys.Rev. C61, 051304 (2000)

I.Ahmad, R.W.Dunford, H.Esbensen, D.S.Gemmell, E.P.Kanter, U.Rutt, S.H.Southworth

Nuclear Excitation by Electronic Transition in ¹⁸⁹Os

NUCLEAR REACTIONS ¹⁸⁹Os(X-ray, X), E=69.47-69.97 keV; measured isomer yield; deduced probability for nuclear excitation by electronic transition.

RADIOACTIVITY ^189mOs(IT); measured T_1/2.

doi: 10.1103/PhysRevC.61.051304
Citations: PlumX Metrics

1999AH07      Phys.Rev. C60, 064601 (1999)

I.Ahmad, S.M.Austin, B.B.Back, R.R.Betts, F.P.Calaprice, K.C.Chan, A.Chishti, C.M.Conner, R.W.Dunford, J.D.Fox, S.J.Freedman, M.Freer, S.B.Gazes, A.L.Hallin, Th.Happ, D.Henderson, N.I.Kaloskamis, E.Kashy, W.Kutschera, J.Last, C.J.Lister, M.Liu, M.R.Maier, D.M.Mercer, D.Mikolas, P.A.A.Perera, M.D.Rhein, D.E.Roa, J.P.Schiffer, T.A.Trainor, P.Wilt, J.S.Winfield, M.Wolanski, F.L.H.Wolfs, A.H.Wuosmaa, A.R.Young, J.E.Yurkon

Positron-Electron Pairs Produced in Heavy-Ion Collisions

NUCLEAR REACTIONS ²³²Th(²³⁸U, X), E=5.95 MeV/nucleon; ¹⁸¹Ta(²³⁸U, X), E=5.95, 6.1, 6.3 MeV/nucleon; measured positron, electron spectra, multiplicities, e^-e⁺-coin, angular correlation; deduced no sharp structure in sum-energy spectra. APEX spectrometer.

doi: 10.1103/PhysRevC.60.064601
Citations: PlumX Metrics

1998WU02      Phys.Rev. C57, R2794 (1998)

A.H.Wuosmaa, C.M.Conner, I.Ahmad, B.B.Back, R.R.Betts, R.W.Dunford, S.M.Fischer, R.Ganz, J.P.Greene, N.I.Kaloskamis, L.Lamm, C.J.Lister, V.Nanal, D.E.Roa, J.P.Schiffer

Positron-Electron Angular Correlations in Internal Pair Conversion

RADIOACTIVITY ⁹⁰Y(β^-); ^206,207Bi(EC); measured e⁺e^--coin, sum energy spectra, opening angle correlations from internal pair conversion in daughter nuclei. ⁹⁰Zr, ^206,207Pb deduced transitions internal pair conversion coefficients.

doi: 10.1103/PhysRevC.57.R2794
Citations: PlumX Metrics

1997AH01      Phys.Rev.Lett. 78, 618 (1997)

I.Ahmad, S.M.Austin, B.B.Back, R.R.Betts, F.P.Calaprice, K.C.Chan, A.Chishti, C.Conner, R.W.Dunford, J.D.Fox, S.J.Freedman, M.Freer, S.B.Gazes, A.L.Hallin, T.Happ, D.Henderson, N.I.Kaloskamis, E.Kashy, W.Kutschera, J.Last, C.J.Lister, M.Liu, M.R.Maier, D.J.Mercer, D.Mikolas, P.A.A.Perera, M.D.Rhein, D.E.Roa, J.P.Schiffer, T.A.Trainor, P.Wilt, J.S.Winfield, M.R.Wolanski, F.L.H.Wolfs, A.H.Wuosmaa, G.Xu, A.Young, J.E.Yurkon, and the APEX Collaboration

Search for Monoenergetic Positron Emission from Heavy-Ion Collisions at Coulomb-Barrier Energies

NUCLEAR REACTIONS ¹⁸¹Ta(²³⁸U, X), E=5.95-6.3 MeV/nucleon; ²³²Th(²³⁸U, X), E=5.95 MeV/nucleon; measured positron energy spectra; deduced no structure.

doi: 10.1103/PhysRevLett.78.618
Citations: PlumX Metrics

1997AH04      Phys.Rev. C55, R2755 (1997)

I.Ahmad, S.M.Austin, B.B.Back, R.R.Betts, F.P.Calaprice, K.C.Chan, A.A.Chishti, C.Conner, R.W.Dunford, J.D.Fox, S.J.Freedman, M.Freer, J.S.Greenberg, S.B.Gazes, A.L.Hallin, T.Happ, D.Henderson, N.I.Kaloskamis, E.Kashy, W.Kutschera, J.Last, C.J.Lister, M.Liu, M.R.Maier, D.J.Mercer, D.Mikolas, P.A.A.Perera, M.D.Rhein, D.E.Roa, J.P.Schiffer, T.A.Trainor, P.Wilt, J.S.Winfield, M.Wolanski, F.L.H.Wolfs, A.H.Wuosmaa, G.Xu, A.Young, J.E.Yurkon, and the APEX Collaboration

Internal Pair Conversion in Heavy Nuclei

NUCLEAR REACTIONS ²⁰⁶Pb(²⁰⁶Pb, X), E=5.90 MeV/nucleon; measured e⁺e^--sum energy spectra, Doppler corrected Eγ; deduced internal pair conversion to gamma branching ratio. ²³²Th(²⁰⁸Pb, X), E=5.80 MeV/nucleon; ²³⁸U(²⁰⁸Pb, X), E=5.80 MeV/nucleon; ¹⁸¹Ta(²³⁸U, X), E=5.95 MeV/nucleon; ²³²Th(²³⁸U, X), E=5.90 MeV/nucleon; measured e⁺e^--sum energy, Doppler corrected Eγ; deduced no discrete lines evidence in e⁺e^- spectra. ²³⁸U deduced new levels evidence.

doi: 10.1103/PhysRevC.55.R2755
Citations: PlumX Metrics

1997AH05      Z.Phys. A358, 235 (1997)

I.Ahmad, S.M.Austin, B.B.Back, R.R.Betts, F.P.Calaprice, K.C.Chan, A.Chishti, P.Chowdhury, C.Conner, R.W.Dunford, J.D.Fox, S.J.Freedman, M.Freer, S.B.Gazes, A.L.Hallin, T.Happ, D.Henderson, N.I.Kaloskamis, E.Kashy, W.Kutschera, J.Last, C.J.Lister, M.Liu, M.R.Maier, D.J.Mercer, D.Mikolas, P.A.A.Perera, M.D.Rhein, D.E.Roa, J.P.Schiffer, T.A.Trainor, P.Wilt, J.S.Winfield, M.Wolanski, F.L.H.Wolfs, A.H.Wuosmaa, A.Young, J.E.Yurkon, and the APEX Collaboration

The Positron-Electron Peak Puzzle: Results from APEX

NUCLEAR REACTIONS ²³²Th(²³⁸U, X), E=5.78-5.95 MeV/nucleon; ¹⁸¹Ta(²³⁸U, X), E=5.79-6.3 MeV/nucleon; measured total (e⁺)(heavy-ion)-, (e⁺e^-)(heavy-ion)-coin events number; deduced very low light neutral particle production upper limits.

doi: 10.1007/s002180050316
Citations: PlumX Metrics

1996AH05      Acta Phys.Pol. B27, 387 (1996)

I.Ahmad, S.M.Austin, B.B.Back, R.R.Betts, F.P.Calaprice, K.C.Chan, A.Chishti, P.Chowdhury, C.Conner, R.W.Dunford, J.D.Fox, S.J.Freedman, M.Freer, S.Gazes, A.L.Hallin, T.Happ, N.Kaloskamis, E.Kashy, W.Kutschera, J.Last, C.J.Lister, M.Liu, M.R.Maier, D.J.Mercer, D.Mikolas, A.Perera, M.D.Rhein, D.E.Roa, J.P.Schiffer, T.Trainor, P.Wilt, J.S.Winfield, M.Wolanski, F.L.H.Wolfs, A.H.Wuosmaa, A.Young, J.E.Yurkon, and the APEX Collaboration

The Positron Peak Puzzle - Recent Results from APEX

NUCLEAR REACTIONS ²³²Th(²³⁸U, X), E=5.95 MeV/nucleon; ¹⁸¹Ta(²³⁸U, X), E=5.96-6.3 MeV/nucleon; ²⁰⁶Pb(²⁰⁶Pb, X), E not given; analyzed e⁺e^--sum energy spectra. ²³²Th, ²³⁸U(²⁰⁸Pb, X), E=5.8 MeV/nucleon; ²³²Th, ¹⁸¹Ta(²³⁸U, X), E=5.95 MeV/nucleon; ²⁰⁶Pb(²⁰⁶Pb, X), E=5.9 MeV/nucleon; analyzed Doppler reconstructed γ spectra; deduced limits on 1.78 MeV ²³⁸U transition possible contribution to (heavy ion)γ-coin.

1996AH07      Nucl.Instrum.Methods Phys.Res. A370, 539 (1996)

I.Ahmad, S.M.Austin, B.B.Back, R.R.Betts, F.P.Calaprice, K.C.Chan, A.Chishti, P.Chowdhury, C.Conner, R.W.Dunford, J.D.Fox, S.J.Freedman, M.Freer, S.B.Gazes, J.S.Greenberg, J.P.Greene, A.L.Hallin, Th.Happ, D.Henderson, N.I.Kaloskamis, E.Kashy, W.Kutschera, J.Last, C.J.Lister, M.Liu, M.R.Maier, D.M.Mercer, D.Mikolas, P.A.A.Perera, M.D.Rhein, D.E.Roa, J.P.Schiffer, T.A.Trainor, P.Wilt, J.S.Winfield, M.Wolanski, F.L.H.Wolfs, A.H.Wuosmaa, G.Xu, A.R.Young, J.E.Yurkon

A Solenoidal Spectrometer for Positron-Electron Pairs Produced in Heavy-Ion Collisions

RADIOACTIVITY ⁸⁵Sr(EC); ¹¹³Sn(EC); ²⁰³Hg(β^-); measured electron spectra; deduced apparatus response, efficiency. New solenoidal spectrometer.

NUCLEAR REACTIONS ¹⁸¹Ta(²³⁸U, X), E=6.1 MeV/nucleon; measured γ-, positron energy spectra. New solenoidal spectrometer.

doi: 10.1016/0168-9002(95)00829-2
Citations: PlumX Metrics

1995AH01      Nucl.Phys. A583, 247c (1995)

I.Ahmad, S.M.Austin, B.B.Back, D.Bazin, R.R.Betts, F.P.Calaprice, K.C.Chan, A.Chishti, P.Chowdhury, R.W.Dunford, J.D.Fox, S.J.Freedman, M.Freer, S.B.Gazes, J.S.Greenberg, A.L.Hallin, T.Happ, J.Last, N.Kaloskamis, E.Kashy, W.Kutschera, C.J.Lister, M.Liu, M.R.Maier, D.Mercer, A.Perera, M.D.Rhein, D.E.Roa, J.P.Schiffer, T.Trainor, P.Wilt, J.S.Winfield, M.Wolanski, F.L.H.Wolfs, A.H.Wuosmaa, G.Xu, A.Young, J.E.Yurkon

Positron Production in Heavy Ion Collisions: Current status of the problem

NUCLEAR REACTIONS ¹⁸¹Ta(²³⁸U, X), E=5.9-6.3 MeV/nucleon; compiled, analyzed, reviewed electron, positron production data.

doi: 10.1016/0375-9474(94)00667-C
Citations: PlumX Metrics

1995AH06      Phys.Rev.Lett. 75, 2658 (1995)

I.Ahmad, S.M.Austin, B.B.Back, R.R.Betts, F.P.Calaprice, K.C.Chan, A.Chishti, P.Chowdhury, C.Conner, R.W.Dunford, J.D.Fox, S.J.Freedman, M.Freer, S.B.Gazes, A.L.Hallin, T.Happ, D.Henderson, N.I.Kaloskamis, E.Kashy, W.Kutschera, J.Last, C.J.Lister, M.Liu, M.R.Maier, D.J.Mercer, D.Mikolas, P.A.A.Perera, M.D.Rhein, D.E.Roa, J.P.Schiffer, T.A.Trainor, P.Wilt, J.S.Winfield, M.Wolanski, F.L.H.Wolfs, A.H.Wuosmaa, G.Xu, A.Young, J.E.Yurkon, and the APEX Collaboration

Search for Narrow Sum-Energy Lines in Electron-Positron Pair Emission from Heavy-Ion Collisions Near the Coulomb Barrier

NUCLEAR REACTIONS ¹⁸¹Ta(²³⁸U, X), E=5.95-6.3 MeV/nucleon; ²³²Th(²³⁸U, X), E=5.95 MeV/nucleon; measured pair emission sum spectra; deduced no sharp lines evidence, neutral particle isolated decay related features.

doi: 10.1103/PhysRevLett.75.2658
Citations: PlumX Metrics

1995KA61      Z.Phys. D35, 15 (1995)

T.Kandler, Th.Stohlker, P.H.Mokler, C.Kozhuharov, H.Geissel, C.Scheidenberger, P.Rymuza, Z.Stachura, A.Warczak, R.W.Dunford, J.Eichler, A.Ichihara, T.Shirai

Photon Angular Distribution of Radiative Electron Capture into the M Shell of He-Like Uranium Ions at 110-140 MeV/u

NUCLEAR REACTIONS C(U, X), E at 110-140 MeV/nucleon; measured radiative electron capture (into M-shell) associated γ(θ).

doi: 10.1007/BF01439978
Citations: PlumX Metrics

1988AV02      Phys.Rev. D37, 618 (1988)

F.T.Avignone III, C.Baktash, W.C.Barker, F.P.Calaprice, R.W.Dunford, W.C.Haxton, D.Kahana, R.T.Kouzes, H.S.Miley, D.M.Moltz

Search for Axions from the 1115-keV Transition of ⁶⁵Cu

RADIOACTIVITY ⁶⁵Zn(EC), (β⁺); measured γγ-coin; deduced axion search constraints.

doi: 10.1103/PhysRevD.37.618
Citations: PlumX Metrics

1982EN01      Phys.Rev. C25, 1047 (1982)

J.M.Enagonio, F.P.Calaprice, R.W.Dunford, M.M.Lowry

Pair Decay of the 15.1 MeV Level of ¹²C

NUCLEAR REACTIONS ¹²C(p, p'), E=12 MeV; measured (e⁺)(e^-)-coin. ¹²C level deduced pair decay branching ratio. Intermediate image pair spectrometer.

doi: 10.1103/PhysRevC.25.1047
Citations: PlumX Metrics