laboratory computer use   01.50.Lc  
laboratory course design, organization, and evaluation   01.50.Qb  
laboratory experiments and apparatus   01.50.Pa  
laboratory facilities # national and international    01.52.+r  
laboratory procedures   06.60.-c  
laboratory procedures # metrology, measurements, and    06.  
laboratory procedures # other topics in metrology, measurements, and    06.90.+v  
laboratory safety procedures   06.60.Wa  
laboratory studies of space-plasma and astrophysical-plasma processes   52.72.+v  
Lacertae objects, blazars, Seyfert galaxies, Markarian galaxies, and active galactic nuclei) # active and peculiar galaxies and related systems (including BL    98.54.Cm  
Lagrangian and Hamiltonian approach   11.10.Ef  
Lagrangian and Hamiltonian mechanics   45.20.Jj  
Lagrangians # chiral    12.39.Fe  
Lagrangians, and variational principles # canonical formalism,    04.20.Fy  
lamellae, amphiphilic systems, (hydrophilic and hydrophobic interactions) # surfactants, micellar solutions, vesicles,    82.70.Uv  
lamellipods, cilia, and flagella # pseudopods,    87.16.Qp  
laminar boundary layers   47.15.Cb  
laminar flows   47.15.-x  
laminar flows # stability of    47.15.Fe  
laminar flows in cavities   47.15.Rq  
laminar suspensions   47.15.Pn  
Landau levels   71.70.Di  
landmarks, mineralogy, petrology, and atmosphere # features,    96.20.Dt  
Langevin, etc.) # stochastic analysis methods (Fokker - Planck,    05.10.Gg  
Langmuir - Blodgett films on liquids   68.18.-g  
Langmuir - Blodgett films on solids, polymers on surfaces, biological molecules on surfaces   68.47.Pe  
languages, and utilities # computer systems: hardware, operating systems, computer    07.05.Bx  
Laplace equations, boundary-value problems # electrostatics; Poisson and    41.20.Cv  
large islands (e.g., Greenland)   93.30.Kh  
large numbers of components (e.g., 1/Nc expansions) # expansions for    11.15.Pg  
large or froehlich polarons   71.38.Fp  
large scale structure of the Universe # galaxy groups, clusters, and superclusters;    98.65.-r  
large-Q2 scattering # jets in    13.87.-a  
large-scale structure of the Universe (including voids, pancakes, great wall, etc.) # superclusters;    98.65.Dx  
laser ablation   52.38.Mf  
laser applications   42.62.-b  
laser beams (laser-foil, laser-cluster, etc.) # plasma production and heating by    52.50.Jm  
laser behavior # dynamical laser instabilities; noisy    42.60.Mi  
laser cooling, etc.) # atom manipulation (scanning probe microscopy,    39.25.+k  
laser deposition   81.15.Fg  
laser diodes # semiconductor lasers;    42.55.Px  
laser doppler velocimeters, SAR, and LIDAR # range finders, remote sensing devices;    42.79.Qx  
laser imaging # visible radiation: diaphanography, transillumination,    87.63.Lk  
laser inertial confinement   52.57.-z  
laser instabilities; noisy laser behavior # dynamical    42.60.Mi  
laser light absorption in plasmas (collisional, parametric, etc.)   52.38.Dx  
laser materials   42.70.Hj  
laser optical systems: design and operation   42.60.-v  
laser radiation) # ultraviolet, visible, and infrared radiation effects (including    61.80.Ba  
laser spectroscopy   42.62.Fi  
laser systems # design of specific    42.60.By  
laser theory # general    42.55.Ah  
laser-assisted deposition   81.16.Mk  
laser-beam impact phenomena   79.20.Ds  
laser-cluster, etc.) # plasma production and heating by laser beams (laser-foil,    52.50.Jm  
laser-driven acceleration   41.75.Jv  
laser-foil, laser-cluster, etc.) # plasma production and heating by laser beams (   52.50.Jm  
laser-induced magnetic fields in plasmas   52.38.Fz  
laser-modified scattering   34.80.Qb  
laser-modified scattering and reactions   34.50.Rk  
laser-plasma acceleration of electrons and ions   52.38.Kd  
laser-plasma interactions   52.38.-r  
lasers   42.55.-f  
lasers # chemical    42.55.Ks  
lasers # diode-pumped    42.55.Xi  
lasers # doped-insulator lasers and other solid state    42.55.Rz  
lasers # dye    42.55.Mv  
lasers # fiber    42.55.Wd  
lasers # free-electron    41.60.Cr  
lasers # gas lasers including excimer and metal-vapor    42.55.Lt  
lasers # microcavity and microdisk    42.55.Sa  
lasers # Raman    42.55.Ye  
lasers # x-ray and y-ray    42.55.Vc  
lasers and other solid state lasers # doped-insulator    42.55.Rz  
lasers including excimer and metal-vapor lasers # gas    42.55.Lt  
lasers; laser diodes # semiconductor    42.55.Px  
late stages of stellar evolution (including black holes)   97.60.-s  
late-type stars (G, K, and M) # main-sequence:    97.20.Jg  
lattice and discrete methods   04.60.Nc  
lattice dynamics   63.  
lattice dynamics # other topics in    63.90.+t  
lattice dynamics, andsound propagation # structure,    67.80.Cx  
lattice fermion models (Hubbard model, etc.)   71.10.Fd  
lattice gauge theory   11.15.Ha  
lattice modes # anharmonic    63.20.Ry  
lattice QCD calculations   12.38.Gc  
lattice theory and statistics (Ising, Potts, etc.)   05.50.+q  
lattice vibrations and displacive phase transitions # statistical mechanics of    63.70.+h  
lattice, and heavy-fermion phenomena # valence fluctuation, Kondo    75.30.Mb  
lattices # coupled map    05.45.Ra  
lattices # phonons in crystal    63.20.-e  
lava   91.40.Hw  
laws # symmetry and conservation    11.30.-j  
laws # systems obeying scaling    89.75.Da  
layer and shear turbulence # boundary    47.27.Nz  
layer effects # plasma-material interactions; boundary    52.40.Hf  
layer heat flow # boundary    44.20.+b  
layer structure and processes # boundary    92.60.Fm  
layering, surface-induced ordering, wetting, prewetting transitions, and wetting transitions # surface phenomena: alignment, anchoring, anchoring transitions, surface-induced    61.30.Hn  
layers # laminar boundary    47.15.Cb  
layers and thin films # adsorbed    79.60.Dp  
layers on liquids) # liquid phase epitaxy; deposition from liquid phases (melts, solutions, and surface    81.15.Lm  
layers, films, monolayers # thin    82.45.Mp  
layers, Schottky barriers, and work functions # surface double    73.30.+y  
layout and modeling # computer-aided design of microcircuits;    85.40.Bh  
LCAO, etc.) and related methodology (scattering methods, ASA, linearized methods) # basis sets (plane-wave, APS,    71.15.Ap  
leak detectors # vacuum testing methods;    07.30.Hd  
lectures (advanced institutes, summer schools, etc.) # publications of    01.30.Bb  
lectures, and institutes # conferences,    01.10.Fv  
LEED) and reflection high-energy electron diffraction (RHEED) # low-energy electron diffraction (   61.14.Hg  
LEEM) # low energy electron microscopy (   68.37.Nq  
lengths, volume, angles, displacements) # spatial dimensions (e.g., position,    06.30.Bp  
lenses and luminous arcs # gravitational    98.62.Sb  
lenses, prisms and mirrors   42.79.Bh  
lenses, septa # electrostatic    41.85.Ne  
lenticular (S0) galaxies   98.52.Lp  
lepton (including neutrino) aspects # weak-interaction and    23.40.Bw  
lepton masses and mixing # quark and    12.15.Ff  
lepton number) # global symmetries (e.g., baryon number,    11.30.Fs  
lepton-induced reactions   25.30.-c  
leptonic and semileptonic decays   13.30.Ce  
leptonic and semileptonic decays of mesons   13.20.-v  
leptons   14.60.-z  
leptons # decays of    13.35.-r  
leptons # other charged heavy    14.60.Hi  
leptons (see also 13.35.-r decays of leptons) # weak and electromagnetic interactions of    13.10.+q  
leptons) # weak and electromagnetic interactions of leptons (see also 13.35.-r decays of    13.10.+q  
leptons, photons, or other nonhadronic particles # inclusive production with identified    13.85.Qk  
less than 12 hours) # free oscillations (periods    91.30.Ks  
less than or equal to 10 GeV) # hadron-induced low-energy and intermediate-energy reactions and scattering (energy    13.75.-n  
less than or equal to 149 # A is greater than or equal to 90 and is    27.60.+j  
less than or equal to 189 # A is greater than or equal to 150 and is    27.70.+q  
less than or equal to 19 # A is greater than or equal to 5 and is    27.20.+n  
less than or equal to 219 # A is greater than or equal to 190 and is    27.80.+w  
less than or equal to 38 # A is greater than or equal to 20 and is    27.30.+t  
less than or equal to 5 # A is    27.10.+h  
less than or equal to 58 # A is greater than or equal to 39 and is    27.40.+z  
less than or equal to 89 # A is greater than or equal to 59 and is    27.50.+e  
LET # high    87.52.Ln  
LET: associated neutron shielding and measurement # low    87.52.Ga  
LET: therapeutic and diagnostic x-rays and electrons # low    87.52.Df  
letters # surveys and tutorial papers; resource    01.30.Rr  
level # surface waves, tides, and sea    92.10.Hm  
level crossing and optical pumping   32.80.Bx  
level crossing and optical pumping   33.80.Be  
level density   21.10.Ma  
level energies # gamma transitions and    23.20.Lv  
level splitting and interactions   71.70.-d  
levels # collective    21.10.Re  
levels # impurity and defect    71.55.-i  
levels # Landau    71.70.Di  
levels # properties of nuclei; nuclear energy    21.10.-k  
levels and strength functions # single-particle    21.10.Pc  
levels; energy states of adsorbed species # impurity and defect    73.20.Hb  
levitation devices # superconducting magnets; magnetic    85.25.Ly  
levitation, propulsion and control devices # magnetic    85.70.Rp  
levy flights # random walks and    05.40.Fb  
LH, collisional heating # plasma heating by microwaves; ECR,    52.50.Sw  
LIDAR # range finders, remote sensing devices; laser doppler velocimeters, SAR, and    42.79.Qx  
LIDAR and adaptive systems # remote sensing;    42.68.Wt  
Lie algebras of Lie groups   02.20.Sv  
Lie groups # discrete subgroups of    02.20.Rt  
Lie groups # general properties, structure, and representation of    02.20.Qs  
Lie groups # infinite-dimensional    02.20.Tw  
Lie groups # Lie algebras of    02.20.Sv  
lifetime, and trapping # charge carriers: generation, recombination,    72.20.Jv  
lifetime, particle and heat loss, energy balance, field structure, etc. # general theory and basic studies of plasma    52.55.Dy  
lifetimes   21.10.Tg  
lifetimes, state mixing, etc.) # electronic excitation and ionization of molecules; intermediate molecular states (including    34.50.Gb  
lifetimes, transition moments # oscillator strengths,    32.70.Cs  
lifetimes, transition moments, and Franck - Condon factors # oscillator and band strengths,    33.70.Ca  
ligand fields # crystal and    71.70.Ch  
light # effects of atomic coherence on propagation, absorption, and amplification of    42.50.Gy  
light # processes caused by visible and UV    82.50.Hp  
light absorption in plasmas (collisional, parametric, etc.) # laser    52.38.Dx  
light and color detection # scales for    42.66.Qg  
light and matter; related experiments # quantum description of interaction of    42.50.Ct  
light detection, adaptation, and discrimination # vision:    42.66.Lc  
light ions studied to calibrate relativistic heavy ion collisions, should be classified under both 25.75.-q and the 13. or 25. category appropriate to the light ions) # relativistic heavy-ion collisions (collisions induced by    25.75.-q  
light ions) # 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 the 13. or 25. category appropriate to the    25.75.-q  
light microscopy: bright-field, dark-field, phase contrast, DIC   87.64.Rr  
light on atoms, molecules, and ions # mechanical effects of    32.80.Lg  
light on atoms, molecules, electrons, and ions # mechanical effects of    42.50.Vk  
light quarks   14.65.Bt  
light ratio; Tully - Fisher relation, etc.) # statistical and correlative studies of properties (luminosity and mass functions; mass-to-   98.62.Ve  
light scattering # Brillouin and Rayleigh scattering; other    78.35.+c  
light) # interplanetary gas and dust (including gegenschein and zodiacal    96.50.Dj  
light-emitting devices   85.60.Jb  
light-ion inertial confinement   52.58.Ei  
light-sensitive materials   42.70.Gi  
lightning; atmospheric electricity (see also 92.60.Pw in hydrospheric and atomospheric geophysics) # arcs; sparks;    52.80.Mg  
limited devices, and Gunn effect devices) # bulk semiconductor and conductivity oscillation devices (including Hall effect devices, space-charge-   85.30.Fg  
limiters, and compressors # modulators and demodulators; discriminators, comparators, mixers,    84.30.Qi  
limits are, to some degree, arbitrary) # properties of specific nuclei listed by mass ranges (an additional heading must be chosen with these entries, where the given mass number    27.  
limits on production of particles   13.85.Rm  
limnology   92.40.Ni  
line and band intensities # absolute and relative    33.70.Fd  
line and band widths, shapes, and shifts   33.70.Jg  
line formation # stellar atmospheres (photospheres, chromospheres, coronae, magnetospheres); radiative transfer; opacity and    97.10.Ex  
line identification, oscillator strengths, gf values, transition probabilities, etc.) # atomic and molecular data, spectra, and spectral parameters (opacities, rotation constants,    95.30.Ky  
line shapes, widths, and shifts   32.70.Jz  
line-of-sight velocities); space motions # proper motions and radial velocities (   97.10.Wn  
linear accelerators # electrostatic, collective, and    29.17.+w  
linear acoustics # general    43.20.+g  
linear algebra   02.10.Ud  
linear algebra # numerical    02.60.Dc  
linear defects: dislocations, disclinations   61.72.Lk  
linear dynamical systems # general    45.30.+s  
linear viscoelasticity   83.60.Bc  
linear waves # other    52.35.Lv  
linearized methods) # basis sets (plane-wave, APS, LCAO, etc.) and related methodology (scattering methods, ASA,    71.15.Ap  
lines # intensities and shapes of atomic spectral    32.70.-n  
lines and bands # intensities and shapes of molecular spectral    33.70.-w  
lines and cables (including superconducting cables) # high-current and high-voltage technology: power systems; power transmission    84.70.+p  
lines) # radio frequency and microwave radiation (power    87.50.Jk  
lines, striplines # waveguides, transmission    84.40.Az  
lines; diffuse, translucent, and high-velocity clouds # H I regions and 21-cm    98.38.Gt  
lines; diffuse, translucent, and high-velocity clouds # H I regions and 21-cm    98.58.Ge  
link transport # films and weak    67.40.Rp  
lipids   87.14.Cc  
liquid 3He # ions in normal    67.55.Ig  
liquid 3He # normal phase of    67.55.-s  
liquid 3He # superfluid phase of    67.57.-z  
liquid 3He, 4He mixtures # mixed systems;    67.60.-g  
liquid 3He-4He mixtures # ions in    67.60.Js  
liquid 4He # ions in    67.40.Jg  
liquid 4He) # quantum effects on the structure and dynamics of nondegenerate fluids (e.g., normal phase    67.20.+k  
liquid and solid helium # other topics in quantum fluids and solids;    67.90.+z  
liquid and solid helium # quantum fluids and solids;    67.  
liquid crystal structure # continuum models and theories of    61.30.Dk  
liquid crystal structure # molecular and microscopic models and theories of    61.30.Cz  
liquid crystals   42.70.Df  
liquid crystals   61.30.-v  
liquid crystals # defects in    61.30.Jf  
liquid crystals # liquids, emulsions, and suspensions;    77.84.Nh  
liquid crystals # polymer    61.30.Vx  
liquid crystals # transitions in    64.70.Md  
liquid crystals, and porous systems # microconfined liquid crystals: droplets, cylinders, randomly confined liquid crystals, polymer dispersed    61.30.Pq  
liquid crystals, polymer dispersed liquid crystals, and porous systems # microconfined liquid crystals: droplets, cylinders, randomly confined    61.30.Pq  
liquid crystals: droplets, cylinders, randomly confined liquid crystals, polymer dispersed liquid crystals, and porous systems # microconfined    61.30.Pq  
liquid crystals: nematic, cholesteric, smectic, discotic, etc   83.80.Xz  
liquid crystals; electric and magnetic field effects on order # orientational order of    61.30.Gd  
liquid ground states, electron phase diagrams and phase transitions in model systems # non-Fermi-   71.10.Hf  
liquid metals and alloys   61.25.Mv  
liquid metals and alloys # electrical and thermal conduction in amorphous and    72.15.Cz  
liquid metals and semiconductors and their alloys # electronic structure of    71.22.+i  
liquid noble gases   61.25.Bi  
liquid phase epitaxy; deposition from liquid phases (melts, solutions, and surface layers on liquids)   81.15.Lm  
liquid phases (melts, solutions, and surface layers on liquids) # liquid phase epitaxy; deposition from    81.15.Lm  
liquid semiconductors   72.80.Ph  
liquid structure # computer simulation of    61.20.Ja  
liquid structure # theory and models of    61.20.Gy  
liquid structures # studies of specific    61.25.-f  
liquid thin films   68.15.+e  
liquid, etc.) # fermions in reduced dimensions (anyons, composite fermions, Luttinger    71.10.Pm  
liquid-crystal devices # display devices,    42.79.Kr  
liquid-liquid interfaces   68.05.-n  
liquid-liquid transitions   64.70.Ja  
liquid-solid interfaces   68.08.-p  
liquid-vapor transitions   64.70.Fx  
liquids   78.30.Cp  
liquids   78.40.Dw  
liquids   78.55.Bq  
liquids # acoustical properties of    62.60.+v  
liquids # dielectric properties of solids and    77.22.-d  
liquids # diffusion and ionic conduction in    66.10.-x  
liquids # femtosecond probes of molecules in    82.53.Uv  
liquids # high-pressure and shock-wave effects in solids and    62.50.+p  
liquids # Langmuir - Blodgett films on    68.18.-g  
liquids # magnetic    75.50.Mm  
liquids # mechanical properties of    62.10.+s  
liquids # molecular    61.25.Em  
liquids # other topics in structure of solids and    61.90.+d  
liquids # structure of    61.20.-p  
liquids # structure of simple    61.20.Ne  
liquids # thermal conduction in nonmetallic    66.60.+a  
liquids and solids # discharge in    52.80.Wq  
liquids and solids and impact phenomena # other topics in electron and ion emission by    79.90.+b  
liquids and solids; impact phenomena # electron and ion emission by    79.  
liquids) # liquid phase epitaxy; deposition from liquid phases (melts, solutions, and surface layers on    81.15.Lm  
liquids, emulsions, and suspensions; liquid crystals   77.84.Nh  
liquids: electrolytes, molten salts, etc. # structure of associated    61.20.Qg  
liquids: heat capacity, thermal expansion, etc. # thermal properties of    65.20.+w  
liquids; crystallography # structure of solids and    61.  
liquids; diffusive momentum transport # viscosity of    66.20.+d  
listed by mass ranges (an additional heading must be chosen with these entries, where the given mass number limits are, to some degree, arbitrary) # properties of specific nuclei    27.  
literature and publications # physics    01.30.-y  
lithography, masks and pattern transfer   85.40.Hp  
lithography, pattern transfer # fabrication techniques;    42.82.Cr  
lithosphere and mantle # rheology of    91.10.Rn  
loads # mechanical testing, impact tests, static and dynamic    81.70.Bt  
local density approximation, gradient and other corrections # density functional theory,    71.15.Mb  
local group; Magellanic Clouds   98.56.-p  
local moment in compounds and alloys; Kondo effect, valence fluctuations, heavy fermions   75.20.Hr