30.	ATOMIC AND MOLECULAR PHYSICS
31.	Electronic structure of atoms and molecules: theory
31.10.+z	Theory of electronic structure, electronic transitions, and chemical binding in atoms and molecules
31.15.-p	Calculations and mathematical techniques in atomic and molecular physics excluding electron correlation calculations
31.15.Ar	Ab initio calculations (atoms and molecules)
31.15.Bs	Statistical model calculations (atoms and molecules) including Thomas-Fermi and Thomas-Fermi-Dirac models
31.15.Ct	Semi-empirical and empirical calculations (atoms and molecules) including differential overlap, Hückel, PPP methods, etc
31.15.Dv	Coupled cluster theory (atoms and molecules)
31.15.Ew	Density-functional theory (atoms and molecules)
31.15.Fx	Finite-difference schemes (atoms and molecules)
31.15.Gy	Semiclassical methods (atoms and molecules)
31.15.Hz	Group theory (atoms and molecules)
31.15.Ja	Hyperspherical methods (atoms and molecules)
31.15.Kb	Path-integral methods (atoms and molecules)
31.15.Lc	Quasiparticle methods (atoms and molecules)
31.15.Md	Perturbation theory (atoms and molecules)
31.15.Ne	Self-consistent-field methods (atoms and molecules)
31.15.Pf	Variational techniques (atoms and molecules)
31.15.Qg	Molecular dynamics and other numerical methods (atoms and molecules)
31.15.Rh	Valence bond calculations (atoms and molecules)
31.25.-v	Electron correlation calculations for atoms and molecules
31.25.Eb	Electron-correlation calculations for atoms and ions: ground state
31.25.Jf	Electron-correlation calculations for atoms and ions: excited states
31.25.Nj	Electron-correlation calculations for diatomic molecules
31.25.Qm	Electron-correlation calculations for polyatomic molecules
31.30.-i	Corrections to electronic structure of atoms and molecules
31.30.Gs	Hyperfine interactions and isotope effects, Jahn-Teller effect in atoms and molecules
31.30.Jv	Relativistic and quantum electrodynamic effects in atoms and molecules
31.50.-x	Potential energy surfaces (atoms and molecules)
31.50.Bc	Potential energy surfaces for ground electronic states (atoms and molecules)
31.50.Df	Potential energy surfaces for excited electronic states (atoms and molecules)
31.50.Gh	Surface crossings, non-adiabatic couplings (atoms and molecules)
31.70.-f	Effects of atomic and molecular interactions on electronic structure
31.70.Dk	Environmental and solvent effects on electronic structure of atoms and molecules
31.70.Hq	Time-dependent phenomena: excitation and relaxation processes, and reaction rates (atoms and molecules)
31.70.Ks	Molecular solids (electronic structure)
31.90.+s	Other topics in the theory of the electronic structure of atoms and molecules (restricted to new topics in section 31)
32.	Atomic properties and interactions with photons
32.10.-f	Properties of atoms
32.10.Bi	Atomic masses, mass spectra, abundances, and isotopes
32.10.Dk	Atomic electric and magnetic moments, polarizability
32.10.Fn	Atomic fine and hyperfine structure
32.10.Hq	Atomic ionization potentials, electron affinities
32.30.-r	Atomic spectra
32.30.Bv	Radio-frequency, microwave, and infrared atomic spectra
32.30.Dx	Magnetic resonance atomic spectra
32.30.Jc	Visible and ultraviolet atomic spectra
32.30.Rj	X-ray atomic spectra
32.50.+d	Atomic fluorescence, phosphorescence including quenching
32.60.+i	Zeeman and Stark effects in atoms
32.70.-n	Intensities and shapes of atomic spectral lines
32.70.Cs	Atomic oscillator strengths, lifetimes, transition moments
32.70.Fw	Atomic absolute and relative intensities
32.70.Jz	Atomic line shapes, widths, and shifts
32.80.-t	Photon interactions with atoms
32.80.Bx	Atomic level crossing and optical pumping
32.80.Cy	Atomic scattering, cross sections, and form factors including Compton scattering
32.80.Dz	Atomic autoionization
32.80.Fb	Photoionization of atoms and ions
32.80.Gc	Photodetachment of atomic negative ions
32.80.Hd	Auger effect and inner-shell atomic excitation or ionization
32.80.Lg	Mechanical effects of light on atoms, molecules, and ions
32.80.Pj	Optical cooling of atoms; trapping
32.80.Qk	Coherent control of atomic interactions with photons
32.80.Rm	Multiphoton ionization and excitation to highly excited states in atoms e.g., Rydberg states
32.80.Wr	Other multiphoton processes in atoms
32.80.Ys	Weak-interaction effects in atoms
32.90.+a	Other topics in atomic properties and interactions of atoms with photons (restricted to new topics in section 32)
33.	Molecular properties and interactions with photons
33.15.-e	Properties of molecules
33.15.Bh	General molecular conformation and symmetry; stereochemistry
33.15.Dj	Interatomic distances and angles in molecules
33.15.Fm	Molecular bond strengths, dissociation energies
33.15.Hp	Molecular barrier heights (internal rotation, inversion, rotational isomerism, conformational dynamics)
33.15.Kr	Molecular electric and magnetic moments (and derivatives), polarizability, and magnetic susceptibility
33.15.Mt	Molecular rotation, vibration, and vibration-rotation constants
33.15.Pw	Molecular fine and hyperfine structure
33.15.Ry	Molecular ionization potentials, electron affinities, molecular core binding energy
33.15.Ta	Molecular mass spectra
33.15.Vb	Correlation times in molecular dynamics
33.20.-t	Molecular spectra
33.20.Bx	Radio-frequency and microwave molecular spectra
33.20.Ea	Infrared molecular spectra
33.20.Fb	Raman and Rayleigh molecular spectra including optical scattering
33.20.Kf	Visible molecular spectra
33.20.Lg	Ultraviolet molecular spectra
33.20.Ni	Vacuum ultraviolet molecular spectra
33.20.Rm	X-ray molecular spectra
33.20.Sn	Rotational analysis (molecular spectra)
33.20.Tp	Vibrational analysis (molecular spectra)
33.20.Vq	Vibration-rotation analysis (molecular spectra)
33.20.Wr	Vibronic, rovibronic, and rotation-electron-spin interactions (molecular spectra)
33.25.+k	Nuclear resonance and relaxation in molecules
33.35.+r	Electron resonance and relaxation of molecules
33.40.+f	Multiple resonances of molecules including double and higher-order resonance processes, such as double nuclear magnetic resonance, electron double resonance, and microwave optical double resonance
33.45.+x	Mössbauer spectra of molecules
33.50.-j	Molecular fluorescence and phosphorescence; radiationless transitions, quenching (intersystem crossing, internal conversion)
33.50.Dq	Molecular fluorescence and phosphorescence spectra
33.50.Hv	Molecular radiationless transitions, quenching
33.55.-b	Optical activity and dichroism; magnetooptical and electrooptical spectra (molecules)
33.55.Ad	Optical activity, optical rotation; circular dichroism (molecules)
33.55.Be	Zeeman and Stark effects (molecules)
33.55.Fi	Other magnetooptical and electrooptical effects (molecules)
33.60.-q	Photoelectron spectra of molecules
33.60.Cv	Ultraviolet and vacuum ultraviolet photoelectron spectra of molecules
33.60.Fy	X-ray photoelectron spectra of molecules
33.70.-w	Intensities and shapes of molecular spectral lines and bands
33.70.Ca	Molecular oscillator and band strengths, lifetimes, transition moments, and Franck-Condon factors
33.70.Fd	Molecular absolute and relative line and band intensities
33.70.Jg	Molecular line and band widths, shapes, and shifts
33.80.-b	Photon interactions with molecules
33.80.Be	Molecular level crossing and optical pumping
33.80.Eh	Autoionization, photoionization, and photodetachment of molecules
33.80.Gj	Diffuse molecular spectra; predissociation, photodissociation
33.80.Ps	Optical cooling of molecules; trapping
33.80.Rv	Multiphoton ionization and excitation to highly excited states in molecules e.g., Rydberg states
33.80.Wz	Other multiphoton processes in molecules
33.90.+h	Other topics in molecular properties and interactions with photons (restricted to new topics in section 33)
34.	Atomic and molecular collision processes and interactions
34.10.+x	General theories and models of atomic and molecular collisions and interactions including statistical theories, transition state, stochastic and trajectory models, etc
34.20.-b	Interatomic and intermolecular potentials and forces, potential energy surfaces for collisions
34.20.Cf	Interatomic potentials and forces
34.20.Gj	Intermolecular and atom-molecule potentials and forces
34.20.Mq	Potential energy surfaces for collisions (atoms and molecules)
34.30.+h	Intramolecular energy transfer; intramolecular dynamics; dynamics of van der Waals molecules
34.50.-s	Scattering of atoms and molecules
34.50.Bw	Energy loss and stopping power (atoms and molecules)
34.50.Dy	Interactions of atoms and molecules with surfaces; photon and electron emission; neutralization of ions
34.50.Ez	Rotational and vibrational energy transfer (atoms and molecules)
34.50.Fa	Electronic excitation and ionization of atoms including beam-foil excitation and ionization
34.50.Gb	Electronic excitation and ionization of molecules; intermediate molecular states including lifetimes, state mixing, etc
34.50.Lf	Chemical reactions, energy disposal, and angular distribution, as studied by atomic and molecular beams
34.50.Pi	State-to-state scattering analyses (atoms and molecules)
34.50.Rk	Laser-modified scattering and reactions (atoms and molecules)
34.60.+z	Scattering in highly excited states (atoms and molecules) e.g. Rydberg states
34.70.+e	Charge transfer (atoms and molecules)
34.80.-i	Electron scattering (atoms and molecules)
34.80.Bm	Elastic scattering of electrons by atoms and molecules
34.80.Dp	Atomic excitation and ionization by electron impact
34.80.Gs	Molecular excitation and ionization by electron impact
34.80.Ht	Dissociation and dissociative attachment by electron impact (atoms and molecules)
34.80.Kw	Electron-ion scattering; excitation and ionization
34.80.Lx	Electron-ion recombination and electron attachment
34.80.My	Fundamental electron inelastic scattering processes in weakly ionized gases
34.80.Nz	Spin dependence of cross sections; polarized electron beam scattering experiments
34.80.Pa	Coherence and correlation in electron scattering (atoms and molecules)
34.80.Qb	Laser-modified scattering (atoms and molecules)
34.85.+x	Positron scattering (atoms and molecules)
34.90.+q	Other topics in atomic and molecular collision processes and interactions (restricted to new topics in section 34)
36.	Exotic atoms and molecules; macromolecules; clusters
36.10.-k	Exotic atoms and molecules (containing mesons, muons, and other unusual particles)
36.10.Dr	Positronium, muonium, muonic atoms and molecules
36.10.Gv	Mesonic atoms and molecules, hyperonic atoms and molecules
36.20.-r	Macromolecules and polymer molecules
36.20.Cw	Molecular weights of macromolecules, dispersity
36.20.Ey	Macromolecular conformation (statistics and dynamics)
36.20.Fz	Macromolecular constitution (chains and sequences)
36.20.Hb	Macromolecular configuration (bonds, dimensions)
36.20.Kd	Electronic structure and spectra of macromolecules
36.20.Ng	Vibrational and rotational structure, infrared and Raman spectra of macromolecules
36.40.-c	Atomic and molecular clusters
36.40.Cg	Electronic and magnetic properties of atomic and molecular clusters
36.40.Ei	Phase transitions in atomic and molecular clusters
36.40.Gk	Plasma and collective effects in atomic and molecular clusters
36.40.Jn	Reactivity of atomic and molecular clusters
36.40.Mr	Spectroscopy and geometrical structure of atomic and molecular clusters
36.40.Qv	Stability and fragmentation of atomic and molecular clusters
36.40.Sx	Diffusion and dynamics of atomic and molecular clusters
36.40.Vz	Optical properties of atomic and molecular clusters
36.40.Wa	Charged atomic and molecular clusters
36.90.+f	Other exotic atoms and molecules; macromolecules; clusters (restricted to new topics in section 36)
39.	Instrumentation and techniques for atomic and molecular physics
39.10.+j	Atomic and molecular beam sources and techniques
39.20.+q	Atom interferometry techniques
39.25.+k	Atom manipulation including scanning probe microscopy, laser cooling, etc
39.30.+w	Spectroscopic techniques for atomic and molecular physics
39.90.+d	Other instrumentation and techniques for atomic and molecular physics (restricted to new topics in section 39)