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NSR database version of April 11, 2024.

Search: Author = J.Last

Found 22 matches.

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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
Citations: PlumX Metrics


1997AB32      Phys.Lett. 407B, 212 (1997)

H.Abele, S.Baessler, D.Dubbers, J.Last, U.Mayerhofer, C.Metz, T.M.Muller, V.Nesvizhevsky, C.Raven, O.Scharpf, O.Zimmer

A Measurement of the Beta Asymmetry A in the Decay of Free Neutrons

RADIOACTIVITY 1n(β-); measured β asymmetry from polarized neutron decay; deduced axial vector to vector coupling constants ratio, right-handed currents limits.

doi: 10.1016/S0370-2693(97)00739-9
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


1995AL26      Yad.Fiz. 58, No 5, 799 (1995); Phys.Atomic Nuclei 58, 737 (1995)

V.P.Alfimenkov, G.V.Valsky, A.M.Gagarsky, B.Geltenborg, I.S.Guseva, J.Last, G.A.Petrov, A.K.Petukhov, L.B.Pikelner, Yu.S.Pleva, V.E.Sokolov, V.I.Furman, K.Schreckenbach, O.A.Shcherbakov

Interference Effects in the Angular Distributions of Fragments of Heavy-Nucleus Fission Induced by Thermal and Resonance Neutrons

NUCLEAR REACTIONS 229Th, 239,241Pu, 233,235U, 241Am, 245Cm(polarized n, F), E=cold; 233,235U, 239Pu(polarized n, F), E=slow; analyzed P-odd, P-even asymmetry data following fission.

Data from this article have been entered in the EXFOR database. For more information, access X4 dataset41174.


1995GL04      Nucl.Phys. A593, 125 (1995)

F.Gluck, I.Joo, J.Last

Measurable Parameters of Neutron Decay

RADIOACTIVITY 1n(β-); analyzed electron, proton asymmetries; deduced important phenomenological parameters. Statistical methods.

doi: 10.1016/0375-9474(95)00354-4
Citations: PlumX Metrics


1994AL05      Nucl.Phys. A567, 541 (1994)

A.Ya.Aleksandrovich, A.M.Gagarsky, I.A.Krasnoschokova, G.A.Petrov, V.I.Petrova, A.K.Petukhov, Yu.S.Pleva, P.Geltenbort, J.Last, K.Schreckenbach

New Observation of Space-Parity Violation in Neutron-Induced Fission of 229Th, 241Pu and 241Am

NUCLEAR REACTIONS 229Th, 233U, 237Np, 241Pu, 241Am(polarized n, F), E=cold; measured fission fragment σ(θ); deduced parity violating asymmetry coefficients.

doi: 10.1016/0375-9474(94)90023-X
Citations: PlumX Metrics


1994GO02      Nucl.Phys. A567, 303 (1994)

F.Gonnenwein, A.V.Belozerov, A.G.Beda, S.I.Burov, G.V.Danilyan, A.N.Martemyanov, V.S.Pavlov, V.A.Shchenev, L.N.Bondarenko, Yu.A.Mostovoi, P.Geltenbort, J.Last, K.Schreckenbach

Parity Violation in Ternary Fission

NUCLEAR REACTIONS 233U, 239Pu(polarized n, F), E=cold; measured correlation between neutron spin, fragment momentum for binary, ternary fission. 234U, 240Pu deduced ratio of parity-violating asymmetries for ternary relative to binary fission.

doi: 10.1016/0375-9474(94)90150-3
Citations: PlumX Metrics


1993AB11      Phys.Lett. 316B, 26 (1993)

H.Abele, G.Helm, U.Kania, C.Schmidt, J.Last, D.Dubbers

On the Origin of the 17 keV Neutrino Signals, and a Loss-Free Measurement of the 35S β-Spectrum

RADIOACTIVITY 35S(β-); measured β-spectra; deduced no 17 keV neutrino evidence. Virtually loss free β-spectroscopy method.

doi: 10.1016/0370-2693(93)90652-X
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


1991BE37      Pisma Zh.Eksp.Teor.Fiz. 54, 136 (1991); JETP Lett.(USSR) 54, 132 (1991)

A.V.Belozerov, A.G.Beda, S.I.Burov, G.V.Danilyan, A.N.Martemyanov, V.S.Pavlov, V.A.Shchenev, L.H.Bondarenko, Yu.A.Mostovoi, P.G.Geltenbort, J.Last, K.Schreckenbach, F.Gonnenwein

Ratio of the P-Odd Asymmetry Coefficients in the Separation of Fragments in Double and Triple Fission of U-233 Nuclei by Polarized Neutrons

NUCLEAR REACTIONS 233U(polarized n, F), E=reactor; measured fission fragment P-odd asymmetry coefficients; deduced double, triple fission channel equivalence.


1989DO17      Nucl.Instrum.Methods Phys.Res. A284, 123 (1989)

J.Dohner, H.Abele, I.Reichert, H.Borel, D.Dubbers, S.J.Freedman, J.Last

Measurement of Neutron-Decay Parameters with PERKEO

RADIOACTIVITY 1n(β-); measured β-decay asymmetry T1/2; deduced g(A), g(V). Solenoidal electron spectrometer.

doi: 10.1016/0168-9002(89)90263-5
Citations: PlumX Metrics


1988DO15      Phys.Rev. D38, 2722 (1988)

J.Dohner, J.Last, M.Arnold, S.J.Freedom, D.Dubbers

Pair Decay of the 2.2-MeV Excited State of the Deuteron: Limits on light-particle emission

NUCLEAR REACTIONS 1H(n, γ), E=cold neutron; measured pair spectra features; deduced 2H level Γ(pair)/Γγ.

doi: 10.1103/PhysRevD.38.2722
Citations: PlumX Metrics


1988KL01      Z.Phys. C37, 179 (1988)

E.Klemt, P.Bopp, L.Hornig, J.Last, S.J.Freedman, D.Dubbers, O.Scharpf

The Beta-Decay Asymmetry of the Neutron

RADIOACTIVITY 1n(β-); measured β-decay asymmetry; deduced g(A)/g(V).

doi: 10.1007/BF01579905
Citations: PlumX Metrics


1988LA04      Phys.Rev.Lett. 60, 995 (1988)

J.Last, M.Arnold, J.Dohner, D.Dubbers, S.J.Freedman

Pulsed-Beam Neutron-Lifetime Measurement

RADIOACTIVITY 1n; measured T1/2; deduced (G(A)/G(V)).

doi: 10.1103/PhysRevLett.60.995
Citations: PlumX Metrics


1986BO04      Phys.Rev.Lett. 56, 919 (1986); Erratum Phys.Rev. 57, 1192 (1986)

P.Bopp, D.Dubbers, L.Hornig, E.Klemt, J.Last, H.Schutze, S.J.Freedman, O.Scharpf

Beta-Decay Asymmetry of the Neutron and g(A)/g(V)

RADIOACTIVITY 1n; measured β-asymmetry, Eβ, Iβ; deduced (g(A)/g(V)). Polarized neutron beam, long solenoidal β-spectrometer.

doi: 10.1103/PhysRevLett.56.919
Citations: PlumX Metrics


1984BO28      J.Phys.(Paris), Colloq.C3, 21 (1984)

P.Bopp, D.Dubbers, E.Klemt, J.Last, H.Schutze, W.Weibler, S.J.Freedman, O.Scharpf

The β-Decay Asymmetry of the Free Neutron

RADIOACTIVITY 1n(β-); measured β-decay asymmetry vs E; deduced (gp/g(A)). Polarized source, superconducting spectrometer.


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