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1995 PACSSummary of Scheme20. NUCLEAR PHYSICS21. Nuclear structure 21.10.-k Properties of nuclei; nuclear energy levels (for properties of specific nuclei listed by mass ranges, see 27) 21.10.Dr Binding energies and masses 21.10.Ft Charge distribution 21.10.Gv Mass and neutron distributions 21.10.Hw Spin, parity, and isobaric spin 21.10.Jx Spectroscopic factors 21.10.Ky Electromagnetic moments 21.10.Ma Level density 21.10.Pc Single-particle levels and strength functions 21.10.Re Collective levels 21.10.Sf Coulomb energies 21.10.Tg Lifetimes 21.30.+y Nuclear forces (see also 13.75.C Nucleon-nucleon interactions) 21.45.+v Few-body systems 21.60.-n Nuclear-structure models and methods 21.60.Cs Shell model 21.60.Ev Collective models 21.60.Fw Models based on group theory 21.60.Gx Cluster models 21.60.Jz Hartree-Fock and random-phase approximations 21.60.Ka Monte Carlo models 21.65.+f Nuclear matter 21.80.+a Hypernuclei 21.90.+f Other topics in nuclear structure 23. Radioactive decay and in-beam spectroscopy (see also 82.55 Radiochemistry) 23.20.-g Electromagnetic transitions 23.20.En Angular distribution and correlation measurements 23.20.Gq Multipole mixing ratios 23.20.Js Multipole matrix elements 23.20.Lv Gamma transitions and level energies 23.20.Nx Internal conversion and extranuclear effects 23.20.Ra Internal pair production 23.40.-s Beta decay; electron and muon capture 23.40.Bw Weak-interaction and lepton (including neutrino) aspects 23.40.Hc Relation with nuclear matrix elements and nuclear structure 23.50.+z Decay by proton emission 23.60.+e Alpha decay 23.70.+j Heavy-particle decay 23.90.+w Other topics in radioactive decay and in-beam spectroscopy 24. Nuclear reactions: general 24.10.-i Nuclear-reaction models and methods 24.10.Cn Many-body theory 24.10.Eq Coupled-channel and distorted-wave models 24.10.Ht Optical and diffraction models 24.10.Jv Relativistic models 24.30.-v Resonance reactions 24.30.Cz Giant resonances 24.30.Gd Other resonances 24.50.+g Direct reactions 24.60.-k Statistical theory and fluctuations 24.60.Dr Statistical compound-nucleus reactions 24.60.Gv Statistical multistep direct reactions 24.60.Ky Fluctuation phenomena 24.60.Lz Chaos 24.70.+s Polarization phenomena in reactions 24.75.+i General properties of fission 24.80.-x Fundamental interactions in nuclei 24.80.Ba Tests of electroweak models 24.80.Dc Symmetries in nuclear processes 24.85.+p Quarks, gluons, and QCD in nuclei and nuclear processes 24.90.+d Other topics in nuclear reactions: general 25. Nuclear reactions: specific reactions 25.10.+s Nuclear reactions involving few-nucleon systems 25.20.-x Photonuclear reactions 25.20.Dc Photon absorption and scattering 25.20.Lj Photoproduction reactions 25.30.-c Lepton-induced reactions 25.30.Bf Elastic electron scattering 25.30.Dh Inelastic electron scattering to specific states 25.30.Fj Inelastic electron scattering to continuum 25.30.Hm Positron scattering 25.30.Mr Muon scattering (including the EMC effect) 25.30.Pt Neutrino scattering 25.30.Rw Electroproduction reactions 25.40.-h Nucleon-induced reactions (see also 28.20 Neutron physics) 25.40.Cm Elastic proton scattering 25.40.Dn Elastic neutron scattering 25.40.Ep Inelastic proton scattering 25.40.Fq Inelastic neutron scattering 25.40.Hs Transfer reactions 25.40.Kv Charge-exchange reactions 25.40.Lw Radiative capture 25.40.Ny Resonance reactions 25.40.Qa (p,pi) reactions 25.40.Sc Spallation reactions 25.40.Ve Other reactions above meson production thresholds (energies > 400 MeV) 25.43.+t Antiproton-induced reactions 25.45.-z Sup 2 H-induced reactions 25.45.De Elastic and inelastic scattering 25.45.Hi Transfer reactions 25.45.Kk Charge-exchange reactions 25.55.-e Sup 3 H-, sup 3 He-, and sup 4 He-induced reactions 25.55.Ci Elastic and inelastic scattering 25.55.Hp Transfer reactions 25.55.Kr Charge-exchange reactions 25.60.+v Reactions induced by unstable nuclei 25.70.-z Low and intermediate energy heavy-ion reactions 25.70.Bc Elastic and quasielastic scattering 25.70.De Coulomb excitation 25.70.Ef Resonances 25.70.Gh Compound nucleus 25.70.Hi Transfer reactions 25.70.Jj Fusion and fusion-fission reactions 25.70.Kk Charge-exchange reactions 25.70.Lm Strongly damped collisions 25.70.Mn Projectile and target fragmentation 25.70.Pq Multifragment emission and correlations 25.75.+r Relativistic heavy-ion reactions (includes collisions induced by light ions studied to calibrate relativistic heavy ion collisions, should be classified under both 25.75 and the 13 or 25 category appropriate to the light ions) 25.80.-e Meson- and hyperon-induced reactions 25.80.Dj Pion elastic scattering 25.80.Ek Pion inelastic scattering 25.80.Gn Pion charge-exchange reactions 25.80.Hp Pion-induced reactions 25.80.Ls Pion inclusive scattering and absorption 25.80.Nv Kaon-induced reactions 25.80.Pw Hyperon-induced reactions 25.85.-w Fission reactions 25.85.Ca Spontaneous fission 25.85.Ec Neutron-induced fission 25.85.Ge Charged-particle-induced fission 25.85.Jg Photofission 25.90.+k Other topics in nuclear reactions: specific reactions 27. Properties of specific nuclei listed by mass ranges (an additional heading must be chosen with these entries, where the given mass number limits are, to some degree, arbitrary) 27.10.+h A <_ 5 27.20.+n 6 <_ A <_ 19 27.30.+t 20 <_ A <_ 38 27.40.+z 39 <_ A <_ 58 27.50.+e 59 <_ A <_ 89 27.60.+j 90 <_ A <_ 149 27.70.+q 150 <_ A <_ 189 27.80.+w 190 <_ A <_ 219 27.90.+b 220 <_ A 28. Nuclear engineering and nuclear power studies 28.20.-v Neutron physics (see also 25.40 Nucleon-induced reactions) 28.20.Cz Neutron scattering 28.20.Fc Neutron absorption 28.20.Gd Neutron transport: diffusion and moderation 28.41.-i Fission reactors 28.41.Ak Theory, design, and computerized simulation 28.41.Bm Fuel elements, preparation, reloading, and reprocessing 28.41.Fr Reactor coolants, reactor cooling, and heat recovery 28.41.Kw Radioactive wastes, waste disposal 28.41.Mx Reactor control systems 28.41.Pa Moderators 28.41.Qb Structural and shielding materials 28.41.Rc Instrumentation 28.41.Te Protection systems, safety, radiation monitoring, accidents, and dismantling 28.50.-k Fission reactor types 28.50.Dr Research reactors 28.50.Ft Fast and breeder reactors 28.50.Hw Power and production reactors 28.50.Ky Propulsion reactors 28.50.Ma Auxiliary generators 28.50.Qd Other reactors 28.52.-s Fusion reactors (for fusion reactor types, see 52.55) 28.52.Av Theory, design, and computerized simulation 28.52.Cx Fueling, heating, and ignition 28.52.Fa Materials 28.52.Lf Components and instrumentation 28.52.Nh Safety 28.60.+s Isotope separation and enrichment 28.70.+y Nuclear explosions (see also 47.40 Compressional flows; shock and detonation phenomena, 87.50.N, P--in medical physics; 83.50.T--in rheology) 28.90.+i Other topics in nuclear engineering and nuclear power studies 29. Experimental methods and instrumentation for elementary-particle and nuclear physics 29.17.+w Electrostatic, collective, and linear accelerators 29.20.-c Cyclic accelerators and storage rings 29.20.Dh Storage rings 29.20.Fj Betatrons 29.20.Hm Cyclotrons 29.20.Lq Synchrotrons 29.20.Mr Other cyclic accelerators 29.25.-t Particle sources and targets 29.25.Bx Electron sources 29.25.Dz Neutron sources 29.25.Lg Ion sources: polarized 29.25.Ni Ion sources: positive and negative 29.25.Pj Polarized and other targets 29.25.Rm Sources of radioactive nuclei 29.27.-a Beams in particle accelerators (for low energy charged-particle beams, see 41.75) 29.27.Ac Beam injection and extraction 29.27.Bd Beam dynamics; collective effects and instabilities 29.27.Eg Beam handling; beam transport 29.27.Fh Beam characteristics 29.27.Hj Polarized beams 29.30.-h Spectrometers and spectroscopic techniques 29.30.Aj Charged-particle spectrometers: electric and magnetic 29.30.Dn Electron spectroscopy 29.30.Ep Charged-particle spectroscopy 29.30.Hs Neutron spectroscopy 29.30.Kv X- and gamma-ray spectroscopy 29.30.Lw Nuclear orientation devices 29.40.-n Radiation detectors (for mass spectrometers, see 07.75) 29.40.Cs Gas-filled counters: ionization chambers, proportional, and avalanche counters 29.40.Gx Tracking and position-sensitive detectors 29.40.Ka Cherenkov detectors 29.40.Mc Scintillation detectors 29.40.Rg Nuclear emulsions 29.40.Vj Calorimeters 29.40.Wk Solid-state detectors 29.40.Ym Other detectors 29.50.+v Computer interfaces (for electronic circuits, see 84.30) 29.85.+c Computer data analysis 29.90.+r Other topics in elementary-particle and nuclear physics experimental methods and instrumentation |

