PACS 2010 Regular Edition—Sec. 20

21. Nuclear structure (for nucleon structure, see 14.20.Dh Properties of protons and neutrons; 13.40.-f for electromagnetic processes and properties; 13.60.Hb for deep-inelastic structure functions)
21.10.-k Properties of nuclei; nuclear energy levels (for properties of specific nuclei listed by mass ranges, see section 27)
21.10.Dr Binding energies and masses
21.10.Ft Charge distribution
21.10.Gv Nucleon distributions and halo features
21.10.Hw Spin, parity, and isobaric spin
21.10.Jx Spectroscopic factors and asymptotic normalization coefficients
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, analogue states
21.10.Tg Lifetimes, widths
21.30.-x Nuclear forces (see also 13.75.Cs Nucleon-nucleon interactions)
21.30.Cb Nuclear forces in vacuum
21.30.Fe Forces in hadronic systems and effective interactions
21.45.-v Few-body systems
21.45.Bc Two-nucleon system
21.45.Ff Three-nucleon forces
21.60.-n Nuclear structure models and methods
21.60.Cs Shell model
21.60.De Ab initio methods
21.60.Ev Collective models
21.60.Fw Models based on group theory
21.60.Gx Cluster models
21.60.Jz Nuclear Density Functional Theory and extensions (includes Hartree-Fock and random-phase approximations)
21.60.Ka Monte Carlo models
21.65.-f Nuclear matter (for exotic atoms and molecules, see 36.10.-k)
21.65.Cd Asymmetric matter, neutron matter
21.65.Ef Symmetry energy
21.65.Jk Mesons in nuclear matter
21.65.Mn Equations of state of nuclear matter (see also 26.60.Kp Equations of state of neutron-star matter)
21.65.Qr Quark matter (see also 12.38.Mh Quark-gluon plasma in quantum chromodynamics; 25.75.Nq Quark deconfinement, quark-gluon plasma production and phase transitions in relativistic heavy-ion collisions)
21.80.+a Hypernuclei
21.85.+d Mesic nuclei
21.90.+f Other topics in nuclear structure (restricted to new topics in section 21)
23. Radioactive decay and in-beam spectroscopy
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 γ transitions and level energies
23.20.Nx Internal conversion and extranuclear effects (including Auger electrons and internal bremsstrahlung)
23.20.Ra Internal pair production
23.35.+g Isomer decay
23.40.-s β decay; double β decay; electron and muon capture
23.40.Bw Weak-interaction and lepton (including neutrino) aspects (see also 14.60.Pq Neutrino mass and mixing)
23.40.Hc Relation with nuclear matrix elements and nuclear structure
23.50.+z Decay by proton emission
23.60.+e α decay
23.70.+j Heavy-particle decay
23.90.+w Other topics in radioactive decay and in-beam spectroscopy (restricted to new topics in section 23)
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
24.10.Lx Monte Carlo simulations (including hadron and parton cascades and string breaking models)
24.10.Nz Hydrodynamic models
24.10.Pa Thermal and statistical 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 in nuclear systems
24.70.+s Polarization phenomena in reactions
24.75.+i General properties of fission
24.80.+y Nuclear tests of fundamental interactions and symmetries
24.85.+p Quarks, gluons, and QCD in nuclear reactions
24.87.+y Surrogate reactions
24.90.+d Other topics in nuclear reactions: general (restricted to new topics in section 24)
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-induced reactions
25.30.Mr Muon-induced reactions (including the EMC effect)
25.30.Pt Neutrino-induced reactions
25.30.Rw Electroproduction reactions
25.40.-h Nucleon-induced reactions (see also 28.20.-v 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, π) 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 2H-induced reactions
25.45.De Elastic and inelastic scattering
25.45.Hi Transfer reactions
25.45.Kk Charge-exchange reactions
25.55.-e 3H-, 3He-, and 4He-induced reactions
25.55.Ci Elastic and inelastic scattering
25.55.Hp Transfer reactions
25.55.Kr Charge-exchange reactions
25.60.-t Reactions induced by unstable nuclei
25.60.Bx Elastic scattering
25.60.Dz Interaction and reaction cross sections
25.60.Gc Breakup and momentum distributions
25.60.Je Transfer reactions
25.60.Lg Charge-exchange reactions
25.60.Pj Fusion reactions
25.60.Tv Radiative capture
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.-q Relativistic heavy-ion collisions (collisions induced by light ions studied to calibrate relativistic heavy-ion collisions should be classified under both 25.75.-q and sections 13 or 25 appropriate to the light ions)
25.75.Ag Global features in relativistic heavy ion collisions
25.75.Bh Hard scattering in relativistic heavy ion collisions
25.75.Cj Photon, lepton, and heavy quark production in relativistic heavy ion collisions
25.75.Dw Particle and resonance production
25.75.Gz Particle correlations and fluctuations
25.75.Ld Collective flow
25.75.Nq Quark deconfinement, quark-gluon plasma production, and phase transitions (see also 12.38.Mh Quark-gluon plasma in quantum chromodynamics; 21.65.Qr Quark matter in nuclear matter)
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 (restricted to new topics in section 25)
26. Nuclear astrophysics (see also 95.30.-k Fundamental aspects of astrophysics in astronomy)
26.20.-f Hydrostatic stellar nucleosynthesis (see also 97.10.Cv Stellar structure, interiors, evolution, nucleosynthesis, ages in astronomy)
26.20.Cd Stellar hydrogen burning
26.20.Fj Stellar helium burning
26.20.Kn s-process
26.20.Np Nucleosynthesis in late stellar evolution
26.20.Qr Quasistatistical processes
26.30.-k Nucleosynthesis in novae, supernovae, and other explosive environments
26.30.Ca Explosive burning in accreting binary systems (novae, x-ray bursts)
26.30.Ef Explosive burning in supernovae shock fronts
26.30.Hj r-process
26.30.Jk Weak interaction and neutrino induced processes, galactic radioactivity
26.35.+c Big Bang nucleosynthesis (see also 98.80.Ft Origin, formation, and abundances of the elements in astronomy)
26.40.+r Cosmic ray nucleosynthesis
26.50.+x Nuclear physics aspects of novae, supernovae, and other explosive environments
26.60.-c Nuclear matter aspects of neutron stars
26.60.Dd Neutron star core
26.60.Gj Neutron star crust
26.60.Kp Equations of state of neutron-star matter
26.65.+t Solar neutrinos (see also 96.60.Vg Particle emission, solar wind in solar physics)
26.90.+n Other topics in nuclear astrophysics (restricted to new topics in section 26)
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 A ≥ 220
28. Nuclear engineering and nuclear power studies
28.20.-v Neutron physics (see also 25.40.-h Nucleon-induced reactions and 25.85.Ec Neutron-induced fission)
28.20.Cz Neutron scattering
28.20.Fc Neutron absorption
28.20.Gd Neutron transport: diffusion and moderation
28.20.Ka Thermal neutron cross sections
28.20.Np Neutron capture γ-rays
28.20.Pr Neutron imaging; neutron tomography
28.41.-i Fission reactors (see also 89.30.Gg nuclear fission power in energy resources)
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.My 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
28.41.Vx Fuel cycles
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
28.52.-s Fusion reactors (see also 52.55.-s Magnetic confinement and equilibrium, 52.57.-z Laser inertial confinement, and 52.58.-c Other confinement methods in physics of plasmas; 89.30.Jj Nuclear fusion power in energy resources)
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 (see also 87.55.N- Radiation monitoring, control, and safety in biological and medical physics)
28.60.+s Isotope separation and enrichment
28.65.+a Accelerator-driven transmutation of nuclear waste
28.70.+y Nuclear explosions (see also 47.40.-x Compressible flows; shock waves; for radiation protection from fallout, see 87.53.Bn; for nuclear explosion seismology, see 91.30.Rz)
28.90.+i Other topics in nuclear engineering and nuclear power studies (restricted to new topics in section 28)
29. Experimental methods and instrumentation for elementary-particle and nuclear physics
29.20.-c Accelerators (for accelerators used in medical applications, see
29.20.Ba Electrostatic accelerators
29.20.D- Cyclic accelerators and storage rings
29.20.db Storage rings and colliders
29.20.df Betatrons
29.20.dg Cyclotrons Synchrotrons
29.20.Ej Linear accelerators
29.25.-t Particle sources and targets (see also 52.59.-f Intense particle beams and radiation sources in physics of plasmas; Radioactive sources in medical physics)
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.-i and 41.85.-p)
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 (for energy loss and stopping power, see 34.50.Bw in atomic physics, and 61.85.+p in condensed matter physics)
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 γ-ray spectroscopy
29.30.Lw Nuclear orientation devices
29.38.-c Radioactive beams
29.38.Db Fast radioactive beam techniques
29.38.Gj Reaccelerated radioactive beams
29.40.-n Radiation detectors (for mass spectrometers, see 07.75.+h; see also 95.55.Vj Neutrino, muon, pion, and other particle detectors; cosmic ray detectors in astronomy)
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
29.50.+v Computer interfaces
29.85.-c Computer data analysis
29.85.Ca Data acquisition and sorting
29.85.Fj Data analysis
29.87.+g Nuclear data compilation
29.90.+r Other topics in elementary-particle and nuclear physics experimental methods and instrumentation (restricted to new topics in section 29)