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NSR database version of May 24, 2024.

Search: Author = S.Yokoyama

Found 11 matches.

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2001TH01      Phys.Rev. C63, 014308 (2001)

M.Thoennessen, S.Yokoyama, P.G.Hansen

First Evidence for Low Lying s-Wave Strength in 13Be

NUCLEAR REACTIONS 9Be(18O, X), E=80 MeV/nucleon; measured n-12Be relative velocity spectra following projectile fragmentation. 13Be deduced low-lying s wave strength, virtual state features. Sequential neutron decay spectroscopy.

doi: 10.1103/PhysRevC.63.014308
Citations: PlumX Metrics


1999TH01      Phys.Rev. C59, 111 (1999)

M.Thoennessen, S.Yokoyama, A.Azhari, T.Baumann, J.A.Brown, A.Galonsky, P.G.Hansen, J.H.Kelley, R.A.Kryger, E.Ramakrishnan, P.Thirolf

Population of 10Li by Fragmentation

NUCLEAR REACTIONS 9Be(18O, X)10Li, E=80 MeV/nucleon; measured n-9Li relative velocity spectra. 10Li deduced low-lying s-wave strength.

doi: 10.1103/PhysRevC.59.111
Citations: PlumX Metrics


1998AZ01      Phys.Rev. C57, 628 (1998)

A.Azhari, T.Baumann, J.A.Brown, M.Hellstrom, J.H.Kelley, R.A.Kryger, D.J.Millener, H.Madani, E.Ramakrishnan, D.E.Russ, T.Suomijarvi, M.Thoennessen, S.Yokoyama

Proton Decay of States in 11N

NUCLEAR REACTIONS 9Be(12N, 11N), E=40 MeV/nucleon; measured projectile-like fragment decay p(10C)-coin. 11N deduced levels J, π, Γ, proton decay branching ratios.

doi: 10.1103/PhysRevC.57.628
Citations: PlumX Metrics


1998BA37      Nucl.Phys. A635, 428 (1998)

T.Baumann, E.Ramakrishnan, A.Azhari, J.R.Beene, R.J.Charity, J.F.Dempsey, M.L.Halbert, P.-F.Hua, R.A.Kryger, P.E.Mueller, R.Pfaff, D.G.Sarantites, L.G.Sobotka, D.W.Stracener, M.Thoennessen, G.Van Buren, R.L.Varner, S.Yokoyama

Evolution of the Giant Dipole Resonance in Excited 120Sn and 208Pb Nuclei Populated by Inelastic Alpha Scattering

NUCLEAR REACTIONS 120Sn(α, α'), E=40, 50 MeV/nucleon; 208Pb(α, α'), E=40 MeV/nucleon; measured Eγ, Iγ, Eα, Iα, αγ-coin. 120Sn, 208Pb deduced GDR width vs temperature, shape effects. Adiabatic coupling model.

doi: 10.1016/S0375-9474(98)00197-3
Citations: PlumX Metrics


1996RA15      Nucl.Phys. A599, 49c (1996)

E.Ramakrishnan, T.Baumann, A.Azhari, R.A.Kryger, R.Pfaff, M.Thoennessen, S.Yokoyama, J.R.Beene, M.L.Halbert, P.E.Mueller, D.W.Stracener, R.L.Varner, G.Van Buren, R.J.Charity, J.F.Dempsey, P.-F.Hua, D.G.Sarantites, L.G.Sobotka

Giant Dipole Resonance in Excited 120Sn and 208Pb Nuclei Populated by Inelastic Alpha Scattering

NUCLEAR REACTIONS 120Sn(α, α'), (α, X), E=40, 50 MeV/nucleon; 208Pb(α, α'), (α, X), E=40 MeV/nucleon; measured αγ-coin. 120Sn, 208Pb deduced GDR width vs excitation.

doi: 10.1016/0375-9474(96)00046-2
Citations: PlumX Metrics


1996RA20      Phys.Rev.Lett. 76, 2025 (1996)

E.Ramakrishnan, T.Baumann, A.Azhari, R.A.Kryger, R.Pfaff, M.Thoennessen, S.Yokoyama, J.R.Beene, M.L.Halbert, P.E.Mueller, D.W.Stracener, R.L.Varner, R.J.Charity, J.F.Dempsey, D.G.Sarantites, L.G.Sobotka

Giant Dipole Resonance Built on Highly Excited States of 120Sn Nuclei Populated by Inelastic α Scattering

NUCLEAR REACTIONS 120Sn(α, α'), E=40, 50 MeV/nucleon; measured γα-coin. 120Sn deduced GDR built on highly excited states, width.

doi: 10.1103/PhysRevLett.76.2025
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1996RA36      Phys.Lett. 383B, 252 (1996)

E.Ramakrishnan, A.Azhari, J.R.Beene, R.J.Charity, M.L.Halbert, P.-F.Hua, R.A.Kryger, P.E.Mueller, R.Pfaff, D.G.Sarantites, L.G.Sobotka, M.Thoennessen, G.Van Buren, R.L.Varner, S.Yokoyama

Temperature Dependence of the Giant Dipole Resonance Width in 208Pb

NUCLEAR REACTIONS 208Pb(α, α'), E=40 MeV/nucleon; measured α-spectra, γγ-coin. 208Pb deduced GDR width temperature dependence.

doi: 10.1016/0370-2693(96)00746-0
Citations: PlumX Metrics


1995KR03      Phys.Rev.Lett. 74, 860 (1995)

R.A.Kryger, A.Azhari, M.Hellstrom, J.H.Kelley, T.Kubo, R.Pfaff, E.Ramakrishnan, B.M.Sherrill, M.Thoennessen, S.Yokoyama, R.J.Charity, J.Dempsey, A.Kirov, N.Robertson, D.G.Sarantites, L.G.Sobotka, J.A.Winger

Two-Proton Emission from the Ground State of 12O

RADIOACTIVITY 12O(2p) [from 9Be(13O, 12O), secondary beam from 9Be(16O, X), projectile fragmentation]; measured (2p)(12C)-coin decay energy; deduced 2He emission upper limit, branching ratio.

doi: 10.1103/PhysRevLett.74.860
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1995KR24      Nucl.Instrum.Methods Phys.Res. B99, 312 (1995)

R.A.Kryger, A.Azhari, M.Hellstrom, J.H.Kelley, T.Kubo, R.Pfaff, E.Ramakrishnan, B.M.Sherrill, M.Thoennessen, S.Yokoyama, R.J.Charity, J.Dempsey, A.Kirov, N.Robertson, D.G.Sarantites, L.G.Sobotka, J.A.Winger

Studies of Light Nuclei Beyond the Particle Driplines: The two-proton emitter 12O

NUCLEAR REACTIONS 9Be(13O, 12O), E=33.4 MeV/nucleon; measured (10C)(2p)-coin events relative energy, (10C)(2p)(θ) following ejectile breakup; deduced ejectile breakup mechanism related features. 12O deduced no 2He emission evidence.

doi: 10.1016/0168-583X(95)00337-1
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1994KR21      Nucl.Instrum.Methods Phys.Res. A346, 544 (1994)

R.A.Kryger, A.Azhari, E.Ramakrishnan, M.Thoennessen, S.Yokoyama

Efficiency of a BaF2 Scintillator Detector for 15-150 MeV Neutrons

doi: 10.1016/0168-9002(94)90589-4
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1993KR09      Phys.Rev. C47, R2439 (1993)

R.A.Kryger, A.Azhari, A.Galonsky, J.H.Kelley, R.Pfaff, E.Ramakrishnan, D.Sackett, B.M.Sherrill, M.Thoennessen, J.A.Winger, S.Yokoyama

Neutron Decay of 10Li Produced by Fragmentation

NUCLEAR REACTIONS C(18O, X), E=80 MeV/nucleon; measured n(9Li)-coin. 10Li deduced level, neutron decay features.

doi: 10.1103/PhysRevC.47.R2439
Citations: PlumX Metrics


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