NSR Query Results
Output year order : Descending NSR database version of March 21, 2024. Search: Author = J.Helgesson Found 34 matches. 2006GH01 Nucl.Phys. A765, 307 (2006) R.Ghetti, J.Helgesson, G.Lanzano, E.De Filippo, M.Geraci, S.Aiello, S.Cavallaro, A.Pagano, G.Politi, J.L.Charvet, R.Dayras, E.Pollacco, C.Volant, C.Beck, D.Mahboub, R.Nouicer Correlation functions of light charged particles from projectile-like fragment source in E/A = 44 and 77 MeV 40Ar + 27Al collisions NUCLEAR REACTIONS 27Al(40Ar, X), E=44, 77 MeV/nucleon; measured light charged particle and projectile-like fragments energies, two-particle correlation functions; deduced emission time sequence, other reaction mechanism features. ARGOS detector array.
doi: 10.1016/j.nuclphysa.2005.11.019
2006HE12 Phys.Rev. C 73, 044602 (2006) J.Helgesson, R.Ghetti, J.Ekman Implications of two-body fragment decay for the interpretation of emission chronology from velocity-gated correlation functions NUCLEAR REACTIONS 27Al(40Ar, X), E=44 MeV/nucleon; 124Sn(36Ar, X), E=61 MeV/nucleon; analyzed velocity-gated small-angle correlation functions for light charged particles, contributions from independent emission and two-body decay, implications for emission chronology.
doi: 10.1103/PhysRevC.73.044602
2006VE05 Eur.Phys.J. A 30, 81 (2006) G.Verde, A.Chbihi, R.Ghetti, J.Helgesson Correlations and characterization of emitting sources
doi: 10.1140/epja/i2006-10109-6
2005GH02 Nucl.Phys. A752, 480c (2005) Isospin effects in two-particle correlation functions: A probe for the isospin dependence of the nuclear equation of state NUCLEAR REACTIONS 112,124Sn(36Ar, X), E=61 MeV/nucleon; measured Ep, En, neutron-proton and proton-proton correlation functions; deduced isospin effects.
doi: 10.1016/j.nuclphysa.2005.02.052
2005MO15 Phys.Rev.Lett. 94, 202701 (2005) L.G.Moretto, K.A.Bugaev, J.B.Elliott, R.Ghetti, J.Helgesson, L.Phair The Complement: A Solution to Liquid Drop Finite Size Effects in Phase Transitions
doi: 10.1103/PhysRevLett.94.202701
2004AV03 Nucl.Phys. A736, 22 (2004) V.Avdeichikov, R.Ghetti, J.Helgesson, B.Jakobsson, P.Golubev, N.Colonna, H.W.Wilschut Analysis of charged particle emission sources and coalescence in E/A=61 MeV 36Ar + 27Al, 112Sn and 124Sn collisions NUCLEAR REACTIONS 27Al, 112,124Sn(36Ar, pX), (36Ar, dX), (36Ar, tX), E=61 MeV/nucleon; measured particle spectra, correlations; deduced particle source features. Coalescence model.
doi: 10.1016/j.nuclphysa.2004.02.023
2004GH07 Phys.Rev. C 69, 031605 (2004) R.Ghetti, V.Avdeichikov, B.Jakobsson, P.Golubev, J.Helgesson, N.Colonna, G.Tagliente, H.W.Wilschut, S.Kopecky, V.L.Kravchuk, E.W.Anderson, P.Nadel-Turonski, L.Westerberg, V.Bellini, M.L.Sperduto, C.Sutera Isospin effects on two-particle correlation functions in E/A = 61 MeV 36Ar + 112, 124Sn reactions NUCLEAR REACTIONS 112,124Sn(36Ar, nX), (36Ar, pX), (36Ar, dX), (36Ar, tX), E=61 MeV/nucleon; measured particle spectra, two-particle correlation functions; deduced isospin effects.
doi: 10.1103/PhysRevC.69.031605
2004GH10 Nucl.Phys. A734, 597 (2004) R.Ghetti, J.Helgesson, and the CHIC Collaboration Chronology of neutron, proton and deuteron emission in intermediate energy heavy ion reactions NUCLEAR REACTIONS 27Al, 112,124Sn(36Ar, X), E=61 MeV/nucleon; analyzed velocity-gated correlation functions; deduced particle emission times.
doi: 10.1016/j.nuclphysa.2004.01.110
2004GH15 Phys.Rev. C 70, 027601 (2004) R.Ghetti, J.Helgesson, G.Lanzano, E.De Filippo, M.Geraci Two-particle correlation functions in projectilelike emission experiments at very forward angles NUCLEAR REACTIONS 27Al(40Ar, X), E=44, 77 MeV/nucleon; measured Ep, Eα, two-particle correlation functions.
doi: 10.1103/PhysRevC.70.027601
2004GH16 Phys.Rev. C 70, 034601 (2004) R.Ghetti, J.Helgesson, V.Avdeichikov, B.Jakobsson, N.Colonna, H.W.Wilschut Isospin effects on particle emission time sequence in E/A=61 MeV 36Ar + 112, 124Sn reactions NUCLEAR REACTIONS 112,124Sn(36Ar, X), E=61 MeV/nucleon; measured two-particle neutron, proton, and deuteron correlation functions; deduced emission time sequence, isospin effects.
doi: 10.1103/PhysRevC.70.034601
2004HE08 Nucl.Phys. A734, 549 (2004) J.Helgesson, R.Ghetti, L.G.Moretto, D.E.Breus, J.B.Elliot, L.W.Phair, G.J.Wozniak Finite Size Scalings and the Nuclear Liquid-Gas Phase Transition
doi: 10.1016/j.nuclphysa.2004.01.102
2003GH09 Phys.Rev.Lett. 91, 092701 (2003) R.Ghetti, J.Helgesson, V.Avdeichikov, P.Golubev, B.Jakobsson, N.Colonna, G.Tagliente, S.Kopecky, V.L.Kravchuk, H.W.Wilschut, E.W.Anderson, P.Nadel-Turonski, L.Westerberg, V.Bellini, M.L.Sperduto, C.Sutera Chronology of Particle Emission from the E/A = 61 MeV 36Ar + 27Al Reaction NUCLEAR REACTIONS 27Al(36Ar, X), E=61 MeV/nucleon; measured neutron, proton, and deuteron correlation functions; deduced emission time distributions, dissipative binary reaction scenario.
doi: 10.1103/PhysRevLett.91.092701
2003GH13 Nucl.Phys. A721, 313c (2003) R.Ghetti, J.Helgesson, and the CHIC Collaboration Particle emission time sequence intermediate energy heavy ion reactions NUCLEAR REACTIONS 27Al(58Ni, X), E=45 MeV/nucleon; 27Al(36Ar, X), E=60 MeV/nucleon; measured En, Ep, np-coin; deduced correlation functions, emission time sequence.
doi: 10.1016/S0375-9474(03)01058-3
2001GH03 Phys.Rev. C64, 017602 (2001) R.Ghetti, J.Helgesson, N.Colonna, B.Jakobsson, A.Anzalone, V.Bellini, L.Carlen, S.Cavallaro, L.Celano, E.De Filippo, G.D'Erasmo, D.Di Santo, E.M.Fiore, A.Fokin, M.Geraci, F.Giustolisi, A.Kuznetsov, G.Lanzano, D.Mahboub, S.Marrone, F.Merchez, J.Martensson, F.Palazzolo, M.Palomba, A.Pantaleo, V.Paticchio, G.Riera, M.L.Sperduto, C.Sutera, G.Tagliente, M.Urrata, L.Westerberg, and the CHIC Collaboration Influence of Multiple Sources on the Two-Neutron Correlation Function in Ni-Induced, Intermediate Energy, Heavy Ion Reactions NUCLEAR REACTIONS 27Al, Ni, 197Au(58Ni, X), E=45 MeV/nucleon; measured neutron-neutron correlation functions; deduced multiple neutron sources, related reaction mechanism features.
doi: 10.1103/PhysRevC.64.017602
2001GH04 Phys.Rev.Lett. 87, 102701 (2001) R.Ghetti, J.Helgesson, N.Colonna, B.Jakobsson, A.Anzalone, V.Bellini, L.Carlen, S.Cavallaro, L.Celano, E.De Filippo, G.D'Erasmo, D.Di Santo, E.M.Fiore, A.Fokin, M.Geraci, F.Giustolisi, A.Kuznetsov, G.Lanzano, D.Mahboub, S.Marrone, J.Martensson, M.Palomba, A.Pantaleo, V.Paticchio, G.Riera, M.L.Sperduto, C.Sutera, G.Tagliente, M.Urrata Possibility to Deduce the Emission Time Sequence of Neutrons and Protons from the Neutron-Proton Correlation Function NUCLEAR REACTIONS 27Al(58Ni, X), E=45 MeV/nucleon; analyzed neutron-proton correlation functions; deduced emission time sequence.
doi: 10.1103/PhysRevLett.87.102701
2001HE09 Nucl.Phys. A685, 346c (2001) Spin-Isospin Modes in Heavy-Ion Collisions
doi: 10.1016/S0375-9474(01)00551-6
2000GH05 Nucl.Phys. A674, 277 (2000) R.Ghetti, J.Martensson, N.Colonna, J.Helgesson, B.Jakobsson, E.De Filippo, G.Tagliente, G.Lanzano, A.Pantaleo, V.Bellini, A.Anzalone, L.Carlen, S.Cavallaro, L.Celano, G.D'Erasmo, D.Di Santo, E.M.Fiore, A.Fokin, M.Geraci, F.Giustolisi, A.Kuznetsov, D.Mahboub, F.Palazzolo, M.Palomba, V.Paticchio, G.Riera, M.L.Sperduto, C.Sutera, M.Urrata, and the CHIC Collaboration Characterization of Nuclear Sources from Neutron-Neutron, Proton-Proton and Neutron-Proton Correlation Function NUCLEAR REACTIONS 27Al(58Ni, X), E=45 MeV/nucleon; measured proton spectra, neutron spectra, correlation functions; deduced source characteristics. Fermion interferometry.
doi: 10.1016/S0375-9474(00)00156-1
2000GH09 Phys.Rev. C62, 037603 (2000) R.Ghetti, N.Colonna, B.Jakobsson, J.Helgesson, J.Martensson, E.De Filippo, G.Tagliente, G.Lanzano, A.Pantaleo, V.Bellini, A.Anzalone, S.Cavallaro, L.Celano, G.D'Erasmo, D.Di Santo, E.M.Fiore, M.Geraci, F.Giustolisi, A.Kuznetsov, D.Mahboub, F.Merchez, M.Palomba, V.Paticchio, G.Riera, M.L.Sperduto, C.Sutera, M.Urrata, and the CHIC Collaboration Neutron-Neutron Intensity Interferometry in E/A = 45 MeV 58Ni + 27Al, natNi, and 197Au Reactions NUCLEAR REACTIONS 27Al, Ni, 197Au(58Ni, X), E=45 MeV/nucleon; measured neutron spectra, two-neutron correlation functions; deduced dynamical and evaporative emission mechanisms.
doi: 10.1103/PhysRevC.62.037603
1999GH05 Nucl.Phys. A660, 20 (1999) R.Ghetti, N.Colonna, J.Helgesson, E.De Filippo, G.Tagliente, A.Anzalone, V.Bellini, L.Carlen, S.Cavallaro, L.Celano, G.D'Erasmo, D.Di Santo, E.M.Fiore, A.Fokin, M.Geraci, B.Jakobsson, A.Kuznetsov, G.Lanzano, D.Mahboub, Yu.Murin, J.Martensson, A.Pagano, F.Palazzolo, M.Palomba, A.Pantaleo, V.Paticchio, R.Potenza, G.Riera, A.Siwek, M.L.Sperduto, C.Sutera, M.Urrata, L.Westerberg, and the CHIC Collaboration Characterization of Nuclear Sources via Two-Neutron Intensity Interferometry NUCLEAR REACTIONS 27Al(58Ni, X), E=45 MeV/nucleon; measured neutron spectra, two-neutron correlation functions; deduced source features. Two-neutron intensity interferometry, comparisons with evaporative, statistical model predictions.
doi: 10.1016/S0375-9474(99)00377-2
1999HE19 Ann.Phys.(New York) 274, 1 (1999) Spin-Isospin Modes in Heavy-Ion Collisions II. Transport Simulations NUCLEAR REACTIONS 1H(p, nX), E(cm)=2-3 GeV; calculated Δ production σ. 197Au(197Au, X), E=1 GeV/nucleon; 40Ar(p, X), E=500 MeV; calculated Δ production rates, invariant mass spectra, pions production rate, transverse momentum, related in-medium quantities. Transport simulations.
doi: 10.1006/aphy.1999.5906
1998HE30 Phys.Lett. 439B, 243 (1998) Transport Simulations with π and Δ In-Medium Properties NUCLEAR REACTIONS 197Au(197Au, X), E=1 GeV/nucleon; calculated Δ resonance decay widths, invariant mass, pions transverse momentum spectra; deduced in-medium effects. Transport calculations.
doi: 10.1016/S0370-2693(98)01109-5
1997HE12 Phys.Rev. C56, 1187 (1997) Comment on ' Influence of the In-Medium Pion Dispersion Relation in Heavy Ion Collisions '
doi: 10.1103/PhysRevC.56.1187
1997HE17 Phys.Rev. C56, 2626 (1997) J.Helgesson, T.Csorgo, M.Asakawa, B.Lorstad Quantum Statistical Correlations and Single Particle Distributions for Slowly Expanding Systems with Temperature Profile NUCLEAR REACTIONS 197Au(40Ar, X), E=30 MeV/nucleon; analyzed proton spectrum, np correlation function; deduced particle emission time scale, collective radial flow.
doi: 10.1103/PhysRevC.56.2626
1997HE19 Phys.Lett. 411B, 1 (1997) Effects of Spin-Isospin Modes in Transport Simulations NUCLEAR REACTIONS 197Au(197Au, X), E=1 GeV/nucleon; calculated pion, Δ multiplicity, decay rates vs time, neutral pion transverse momentum spectra; deduced in-medium properties effects. Transport model.
doi: 10.1016/S0370-2693(97)00965-9
1996HE04 Nucl.Phys. A597, 672 (1996) Treatment of Pionic Modes at the Nuclear Surface for Transport Descriptions
doi: 10.1016/0375-9474(95)00433-5
1995HE15 Phys.Rev. C52, 427 (1995) Dilepton Production from Pion Annihilation in a Realistic Δ-Hole Model
doi: 10.1103/PhysRevC.52.427
1995HE37 Ann.Phys.(New York) 244, 12 (1995) Spin-Isospin Modes in Heavy-Ion Collisions I: Nuclear Matter at Finite Temperatures NUCLEAR REACTIONS 1H(π, X), E=high; calculated σ for Δ++ production σ vs invariant mass. 1H(p, X), E=high; calculated σ(θ) for Δ++. Microscopic transport simulations.
doi: 10.1006/aphy.1995.1106
1995MU07 Phys.Rev. C51, 2794 (1995) Yu.Murin, V.Avdeychikov, A.Bogdanov, O.Lozhkin, M.Zubkov, M.Berg, L.Carlen, R.Elmer, R.Ghetti, J.Helgesson, B.Jakobsson, B.Noren, J.Nyberg, L.Westerberg, K.Nybo, E.Olberg, T.-F.Thorsteinsen, M.Guttormsen, G.Lovhoiden, J.Bondorf, K.Sneppen, St.Mrowczynski, and the CHIC Collaboration Isobaric Ratios of Fragments Emitted in Incomplete Fusion Reactions NUCLEAR REACTIONS 112,124Sn, 197Au(14N, X), E=14, 32 MeV/nucleon; measured fragments yield, Z=1-5; deduced ratios of 3He/t, 6He/6Li yields, Coulomb barriers. Statistical models.
doi: 10.1103/PhysRevC.51.2794
1994AR04 Nucl.Phys. A572, 600 (1994) The NN-1, π and ΔN-1 Delta Decay Modes in the Nuclear Medium
doi: 10.1016/0375-9474(94)90402-2
1994HE06 Phys.Scr. 49, 21 (1994) Effects of Energy Dependent Δ-Nucleus Optical Potential in Charge Exchange Reactions NUCLEAR REACTIONS 12C(3He, t), E=2 GeV; 12C(p, n), E=830 MeV; calculated σ(θ, Et), σ(θ, En). Energy-dependent Δ-nucleus optical potential.
doi: 10.1088/0031-8949/49/1/003
1994HE36 Z.Phys. A350, 237 (1994) The Decay of Spin-Isospin Modes in a Semi-Infinite Slab
doi: 10.1007/BF01289588
1993CR05 Phys.Lett. 317B, 505 (1993) M.Cronqvist, O.Skeppstedt, M.Berg, L.Carlen, R.Elmer, R.Ghetti, J.Helgesson, B.Jakobsson, B.Noren, A.Oskarsson, F.Merchez, D.Rebreyend, L.Westerberg, V.Avdeychikov, A.Bogdanov, O.Lozhkin, Yu.Murin, K.Nybo, E.Olberg, T.-F.Thorsteinsen, and the CHIC Collaboration Neutron-Proton Interferometry in 30A MeV 40Ar + 197Au Collisions NUCLEAR REACTIONS 197Au, 12C, C, 1H(40Ar, X), E=30 MeV/nucleon; measured nn-, np-, pp-correlation functions; deduced relative correlation strength, mechanisms causing differences.
doi: 10.1016/0370-2693(93)91363-R
1990GU08 Phys.Lett. 241B, 322 (1990) H.-A.Gustafsson, B.Jakobsson, A.Kristiansson, A.Oskarsson, M.Westenius, P.Arve, J.Helgesson, L.Westerberg, K.Aleklett, A.J.Kordyasz, L.Lavergne-Gosselin, L.Stab Deviations from Pure Target Fragmentation in 94A MeV 16O Induced Heavy Ion Reactions NUCLEAR REACTIONS 27Al(16O, X), E=94 MeV/nucleon; measured σ(fragment θ, E); deduced reaction mechanism.
doi: 10.1016/0370-2693(90)91650-Z
1989HE30 Phys.Scr. 40, 595 (1989) Dependence of Nuclear Moments of Inertia on the Triaxial Parameter NUCLEAR STRUCTURE A=152; calculated neutron, proton contribution to moment of inertia vs triaxial parameter.
doi: 10.1088/0031-8949/40/5/005
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