Join in expert discussion on atomic and condensed matter. Methods for atoms, molecules, condensed matter. This includes the structure of the atom, its energy states, and its interactions.
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Graduate Nuclear moments in molecular spectroscopy
- Malamala
- · Replies 19 ·
Graduate Extracting the uncertainty on a measured atomic transition
- Malamala
- · Replies 4 ·
Undergrad Understanding Diffraction Condition in Kittle's Intro to Solid State Physics
- Mart1234
- · Replies 1 ·
Undergrad Using the Ewald sphere to find lattice constant for cubic crystals
- Lars Ph
- · Replies 3 ·
Undergrad Use the Ewald sphere to calculate h,k,l?
- Lars Ph
- · Replies 1 ·
High School What causes the drop of latent heat at lower temperatures in liquid helium?
- snorkack
- · Replies 2 ·
Graduate Energy levels shifts in a time-varying electric field
- BillKet
- · Replies 1 ·
High School How can I learn about atomic energy levels without advanced math?
- abrogard
- · Replies 2 ·
High School Quantum Physics and Atomic Physics
- Vectronix
- · Replies 3 ·
High School Can atoms not notice each other?
- icakeov
- · Replies 10 ·
Graduate Why is the Brillouin zone a torus?
- taishizhiqiu
- · Replies 18 ·
Graduate Superconducting and normal electrons are not interchangeable
- StanislavD
- · Replies 2 ·
Graduate Electric field selection rules for molecular rotation states with different m_N
- BillKet
- · Replies 1 ·
Graduate What is the Wigner–Seitz cell of diamond?
- Urza_tron
- · Replies 4 ·
Undergrad Collision-induced free-free absorption in fluids and superfluids
- snorkack
- · Replies 13 ·
Undergrad Selection Rules for a Diatomic Molecule?
- Sebacide
- · Replies 4 ·
Undergrad Compton scattering experiment
- Viona
- · Replies 1 ·
Graduate Time dependent perturbation theory applied to energy levels
- BillKet
- · Replies 5 ·
Graduate Poor convergence using Fe HMOs for FMO in Gamess
- WillCawdell
- · Replies 4 ·
Undergrad Is it possible to have "ideal surface" whose highest peak is ~1 nm?
- gggnano
- · Replies 13 ·
Graduate Trying to reproduce the energy levels of a molecule from a paper
- BillKet
- · Replies 5 ·
Undergrad Characteristic X Rays: Understanding Atom Reversion
- Viona
- · Replies 1 ·
Undergrad Why is resistivity inversely proportional to resistance for NTC semiconductors?
- homeworkhelpls
- · Replies 3 ·
Undergrad Energy levels of atoms and spectroscopic analysis
- MartinG
- · Replies 13 ·
Undergrad Emission of light from incandescence of metals
- bentzy
- · Replies 5 ·
Graduate Kirkendall effect: vacancy concentration and pair interaction energy
- always_learning
- · Replies 1 ·
Undergrad How azimutal quantum number got its range value
- Avanthica
- · Replies 5 ·
Graduate Why are electrical and thermal conductivities correlated in metals?
- bentzy
- · Replies 6 ·
Graduate Error signal when locking a cavity
- kelly0303
- · Replies 56 ·
Undergrad What do the Roman Numerals mean in Spectroscopic Data?
- arthurhaythornthwait
- · Replies 4 ·
Graduate Quantum projection when measuring state population
- BillKet
- · Replies 8 ·
Graduate Weird beam behavior in a cavity
- kelly0303
- · Replies 6 ·
Graduate Description of in-band relaxation?
- mksiver
- · Replies 2 ·
Graduate Unknown large linewidth of the fringes of a cavity
- kelly0303
- · Replies 5 ·
Graduate Experiments for temperature dependence of persistent supercurrent?
- StanislavD
- · Replies 2 ·
Undergrad Electron transitions within the same excited state?
- pingaan
- · Replies 7 ·
Graduate What is electronic dispersion and why does it matter?
- nouha
- · Replies 1 ·
Undergrad Is a phonon a quasiparticle or a collective excitation?
- emmaphysicshelp229
- · Replies 12 ·
Undergrad Trying to better understand temperature and entropy
- Jaccobtw
- · Replies 1 ·
Undergrad Polarization in Rabi oscillations
- Malamala
- · Replies 5 ·
Undergrad Why do atoms become stable with 8 valence electrons?
- jwags99
- · Replies 2 ·
High School Can you create neutronium by colliding electrons and protons?
- arusse02
- · Replies 3 ·
Undergrad Can Superconductors Reach Relativistic Speeds and Emit Synchrotron Photons?
- sol47739
- · Replies 6 ·
Graduate AC Stark shift in diatomic molecules
- BillKet
- · Replies 6 ·
Graduate How can I overcome alignment issues with a bow-tie cavity?
- kelly0303
- · Replies 3 ·
Graduate Laser frequency locking in bow-tie cavities with angled mirrors
- kelly0303
- · Replies 7 ·
Undergrad Questions about Curie Temperature Characteristics
- korneld
- · Replies 2 ·
Undergrad Superconductors and moving/accelerating charges
- sol47739
- · Replies 3 ·
Graduate Dressed states for a 3 level system
- BillKet
- · Replies 6 ·
Graduate BCS theory of superconductivity and eternal supercurrents?
- StanislavD
- · Replies 8 ·
Graduate Experimental Semiconductor Bandgap Databases
- NikolaiSimonov
- · Replies 3 ·
Undergrad Absorption and emission spectroscopy of atoms
- MartinG
- · Replies 3 ·
Graduate Which one of the GGA or G0W0 calculations is more accurate?
- Mohammad-gl
- · Replies 2 ·
Undergrad Why are the spectral lines weak in my hydrogen Geissler tube?
- Orthoceras
- · Replies 8 ·
Undergrad What actually is the free energy? Why is it useful?
- Tim667
- · Replies 1 ·
Graduate Selection rule for spectra with circular polarization
- forever_physicist
- · Replies 2 ·
Undergrad P-n junction diodes (Both bias)
- kev0
- · Replies 1 ·
Undergrad Ion Ablation Target Experiment: Estimating Energy Spread
- kelly0303
- · Replies 6 ·
Graduate Purpose of index j in equation 1.48a of Modern quantum chemistry
- compchemrulez
- · Replies 9 ·
Undergrad Mathematical model of reflective curves
- hagopbul
- · Replies 5 ·
Undergrad Questions about Hartree-Fock theory from Szabo & Ostlund
- compchemrulez
- · Replies 2 ·
High School Something strange about doping semiconductors
- DrDu
- · Replies 1 ·
Undergrad XRD Scherrer Equation -- need explanation
- physicist888
- · Replies 1 ·
High School Did Mendeleev's periodic table prove the existence of atoms?
- Thecla
- · Replies 53 ·
Undergrad Bragg condition and Bloch states
- Simobartz
- · Replies 7 ·
Graduate Interpreting UV absorption spectra
- nana_yaw
- · Replies 1 ·
Undergrad Transition Dipole Moments for Strontium
- thatboi
- · Replies 1 ·
Graduate Probability of resonant ionization
- Malamala
- · Replies 18 ·
Graduate Indirect and direct band gaps in silicon
- Aun-shi
- · Replies 1 ·
High School What is the focus of Atkins' popular textbook in physical chemistry?
- chow_dhury
- · Replies 20 ·
Undergrad Calculating the specific heat capacity for the 2D Ising model
- julian
- · Replies 1 ·
Undergrad Numerical Calculation of Hamiltonian Overlaps
- thatboi
- · Replies 1 ·
Undergrad What determines the time between atomic absorption and emission of photons?
- dsaun777
- · Replies 19 ·
Graduate Fourier Transform MW spectroscopy in a FB cavity
- kelly0303
- · Replies 1 ·
Undergrad Derivation of Voigt's Shear Modulus
- mgong21
- · Replies 1 ·
Graduate How Can You Identify Perovskite in Solar Cells Without Advanced Lab Techniques?
- Ananya2018
- · Replies 5 ·
Graduate How Do Measurements and Excitation Wavelengths Affect Single NV Center Analysis?
- annaphys
- · Replies 1 ·
Undergrad Measuring the built-in potential of a pn junction
- Mayan Fung
- · Replies 10 ·
Graduate Vibrations in a bow-tie cavity
- kelly0303
- · Replies 16 ·
Graduate Ray Tracing Simulator: Simulating Gaussian Beam in Bow Tie Cavity
- kelly0303
- · Replies 1 ·
Undergrad Wave in phonon as "forward and backward" movement vs temperature
- C Roth
- · Replies 4 ·
Undergrad Isotope measurements in molecules
- BillKet
- · Replies 4 ·
Undergrad How Small Can a Transistor Be and Still Work Reliably?
- OscarCP
- · Replies 19 ·
Undergrad Can resonance be used to split a molecule of CO2?
- Sveral
- · Replies 34 ·
Graduate Magnetic sublevels of a random atom
- Malamala
- · Replies 8 ·
Undergrad Vanadium oxide oxidation states binding energy -- unequal spacing
- sliqu
- · Replies 2 ·
Graduate Laser signal input for PDH lock
- kelly0303
- · Replies 6 ·
Undergrad What are hyperfine levels in the caesium-133 ground state?
- vcsharp2003
- · Replies 56 ·
Graduate Accounting for Astigmatism in Bow Tie Cavity: Finding the Optimal Cavity Length
- kelly0303
- · Replies 9 ·
Graduate Surface impedance equation for resonators
- annaphys
- · Replies 8 ·
Undergrad Space Group Symmetry: What is F d3m Spinel Structure?
- Rzbs
- · Replies 2 ·
Undergrad Capping layer in semiconductor quantum dot fabrication
- ubergewehr273
- · Replies 1 ·
Undergrad Magnetization inside a diamagnetic material antiparallel to ##B_{ext}##
- Wrynn
- · Replies 1 ·
Graduate A good quantum number for Cnv symmetry?
- Amentia
- · Replies 5 ·
Undergrad Broken symmetry in ferromagnetism
- jean194
- · Replies 6 ·
Graduate How to simulate an isotope shift measurement
- Malamala
- · Replies 1 ·
Graduate Centrifugal distortion of a diatomic molecule
- kelly0303
- · Replies 1 ·
Graduate Perturbative treatment of c(I·n)(S·n) term in anapole measurement
- BillKet
- · Replies 1 ·
Graduate "Cross-section" and "half-life" of excited states
- DenisH
- · Replies 3 ·
Graduate Fitting molecular spectra with multiple vibrational levels in Hund case c
- BillKet
- · Replies 7 ·