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Search: Author = K.C.Chan

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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
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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
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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
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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
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1997GE03      Phys.Rev. C55, 2959 (1997)

J.Gehring, B.B.Back, K.C.Chan, M.Freer, D.Henderson, C.L.Jiang, K.E.Rehm, J.P.Schiffer, M.Wolanski, A.H.Wuosmaa

Deep-Inelastic Scattering in ^124,136Xe + ^58,64Ni at Energies Near the Coulomb Barrier

NUCLEAR REACTIONS ^58,64Ni(¹²⁴Xe, X), E=522-556 MeV; ^56,64Ni(¹³⁶Xe, X), E=522-556 MeV; σ(θ), fragment E, mass; deduced deep inelastic σ. Modified extra push model.

doi: 10.1103/PhysRevC.55.2959
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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
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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

1993KA34      Nucl.Instrum.Methods Phys.Res. A330, 447 (1993)

N.I.Kaloskamis, K.C.Chan, A.A.Chishti, J.S.Greenberg, C.J.Lister, S.J.Freedman, M.Wolanski, J.Last, B.Utts

The Trigger Detector for APEX: An array of position-sensitive NaI(Tl) detectors for the imaging of positrons from heavy-ion collisions

RADIOACTIVITY ⁶⁸Ge(EC); measured γγ-coin. Position sensitive cylindrical NaI(Tl) detector.

doi: 10.1016/0168-9002(93)90574-2
Citations: PlumX Metrics

1986LO08      Radiat.Eff. 94, 53 (1986)

M.A.Lone, K.C.D.Chan, P.Y.Wong

Neutron and Bremsstrahlung Yields from 5-25 MeV Electrons on Natural Element Targets of Various Thickness

NUCLEAR REACTIONS Cu, Ta(e, γ), (e, n), E=5-25 MeV; calculated neutron, bremsstrahlung yields.

doi: 10.1080/00337578608208353
Citations: PlumX Metrics

1985CH41      Nucl.Instrum.Methods Phys.Res. B10/11, 419 (1985)

K.C.D.Chan, M.A.Lone, S.E.Adams, P.Y.Wong

Bremsstrahlung and Photo-Neutron Yields from 5-25 MeV Electrons on Thin Slabs of Al, Fe, Cu and Pb

NUCLEAR REACTIONS ²⁷Al, Fe, Cu, Pb(e, γ), E=5-25 MeV; measured bremsstrahlung yields. ²⁷Al, Fe, Cu, Ta, W, Pb(γ, n), E=15, 25 MeV; measured photoneutron yield vs target thickness.

doi: 10.1016/0168-583X(85)90282-4
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1977CH15      Phys.Rev. C15, 1698 (1977)

K.C.Chan, L.Shabason, B.L.Cohen, J.Alzona, T.Congedo

Compound Nucleus (α, p) and (p, p') Reactions on Odd-A Nuclei in the Ni Region

NUCLEAR REACTIONS ⁵⁵Mn, ⁵⁷Fe, ⁵⁹Co, ⁶¹Ni, ^63,65Cu(α, p), E=15, 18 MeV; ⁵⁵Mn, ⁵⁷Fe, ⁵⁹Co, ⁶¹Ni, ⁶³Cu(p, p'), E=12 MeV; measured σ(Ep); deduced compound nucleus σ.

doi: 10.1103/PhysRevC.15.1698
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1977CH24      J.Inorg.Nucl.Chem. 39, 1915 (1977)

K.C.Chan, B.P.Pathak, L.Nikkinen, L.Lessard, I.S.Grant

Independent Yields of Indium and Gallium in the Proton Induced Fission Of Natural Uranium

NUCLEAR REACTIONS ²³⁸U(p, F), E=30-98.6 MeV; measured σ(E, A, Z).

doi: 10.1016/0022-1902(77)80516-2
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetB0112.

1976CH06      Phys.Rev. C13, 1112 (1976)

K.C.Chan, L.Shabason, J.E.Alzona, B.L.Cohen

Analysis of Compound Nucleus Contributions from (α, p) Reactions in Ni and Sn Regions

NUCLEAR REACTIONS ^54,56Fe, ^58,60,62Ni, ^64,66Zn(α, p), E=15, 18 MeV; ^106,110Cd, ^112,114,116Sn(α, p), E=18 MeV; measured σ(Ep, θ).

doi: 10.1103/PhysRevC.13.1112
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1975AL06      Phys.Rev. C11, 1669 (1975)

J.E.Alzona, K.C.Chan, L.Shabason, B.L.Cohen

Compound-Nucleus Contribution to (α, α') Reactions in Ni, Zn, and Sn

NUCLEAR REACTIONS ^58,60,62Ni, ^64,66Zn, ¹¹²Sn(α, α'), E=18 MeV; measured σ(Eα'); deduced reaction parameters.

doi: 10.1103/PhysRevC.11.1669
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1975CH07      Phys.Rev. C11, 1064 (1975)

K.C.Chan, B.L.Cohen, L.Shabason

Nuclear Structure Studies with (d, t) Reactions on ¹¹⁰Cd

NUCLEAR REACTIONS ¹¹⁰Cd(d, t), E=16 MeV; measured σ(Et, θ). ¹⁰⁹Cd deduced levels, L, J, π.

doi: 10.1103/PhysRevC.11.1064
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1975CH38      Phys.Rev. C12, 1844 (1975)

K.C.Chan, B.L.Cohen, L.Shabason, J.E.Alzona, T.Congedo

(d, p) Reactions in the Continuum

NUCLEAR REACTIONS ⁶⁵Cu, ¹¹⁶Cd(d, p), E=9, 10.5, 12 MeV; measured σ(Ep, θ); compared DWBA calculations.

doi: 10.1103/PhysRevC.12.1844
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1973CH34      Phys.Rev. C8, 1363 (1973)

K.C.Chan, G.R.Rao, B.L.Cohen, J.H.Degnan, L.Shabason

Compound-Nucleus Contribution for (p, α) Reaction from Sn and Cd Isotopes

NUCLEAR REACTIONS ^{106,110,112,114,116}Cd, ^{112,114,116,118,120,122,124}Sn(p, α), E=12, 17 MeV; measured σ(Eα). Deduced compound nucleus contribution.

doi: 10.1103/PhysRevC.8.1363
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1973CO01      Phys.Rev. C7, 331 (1973)

B.L.Cohen, G.R.Rao, J.H.Degnan, K.C.Chan

Reaction Mechanisms in (p, p') Reactions Exciting the High-Energy Continuum

NUCLEAR REACTIONS Ni, Cd, Sn, Au, ⁶⁴Ni, ⁹⁴Zr, Zr, ^114,116Cd, ^{118,120,122,124}Sn(p, p'), (d, d'), E=12, 14, 16, 17 MeV; measured σ(Ep'), σ(Ed'); deduced reaction mechanism.

doi: 10.1103/PhysRevC.7.331
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1973DE01      Phys.Rev. C7, 316 (1973)

J.H.Degnan, B.L.Cohen, G.R.Rao, K.C.Chan, L.Shabason

Inelastic Proton Scattering Angular Distributions

NUCLEAR REACTIONS ^112,119,122Sn(p, p'), E=15, 17 MeV; measured σ(Ep', θ), θ(γ); deduced direct, pre-equilibrium contributions.

doi: 10.1103/PhysRevC.7.316
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1973DE44      Phys.Rev. C8, 2255 (1973)

J.H.Degnan, B.L.Cohen, G.R.Rao, K.C.Chan, L.Shabason

Gamma-Ray-Multiplicity Measurements for (α, p), (α, α'), (d, α), (p, α), (d, p), and (p, p') Reactions

NUCLEAR REACTIONS ⁵¹V, ^56,57Fe(p, αγ), (d, αγ), (α, pγ), (α, α'γ), ^58,64Ni, ⁹³Nb, Ag(α, pγ), ⁵⁵Mn, ⁵⁹Co, ⁶⁴Ni(α, α'γ), ⁵¹V, ⁵⁵Mn, ⁵⁶Fe, Ag, ¹¹⁹Sn(d, pγ), ⁵⁶Fe, ^112,122Sn(p, p'γ), E=12-19 MeV; measured Eγ, γ-multiplicity.

doi: 10.1103/PhysRevC.8.2255
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1973RA03      Phys.Rev. C7, 733 (1973)

G.R.Rao, B.L.Cohen, J.H.Degnan, K.C.Chan

Low-Energy Neutron Energy Spectra and the 'Inverse Reaction' Cross Section

NUCLEAR REACTIONS ⁹¹Zr, ⁶¹Ni(p, n), E=12, 13, 14 MeV; measured σ(En).

doi: 10.1103/PhysRevC.7.733
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1972DE32      Phys.Rev. C6, 248 (1972)

J.H.Degnan, B.L.Cohen, G.R.Rao, K.C.Chan

Comparison of Gamma-Ray Multiplicity for Compound-Nucleus and Direct-Reaction Mechanisms

NUCLEAR REACTIONS ⁶⁰Ni, ⁶⁴Ni, ¹⁰⁶Cd, ¹¹²Sn, ¹¹⁶Cd, ¹²²Sn(p, p'γ), E=12, 17 MeV; measured γ-multiplicity.

doi: 10.1103/PhysRevC.6.248
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