This document provides a comprehensive reference on the physical and optical properties of rubidium-85 (Rb-85), particularly relevant to quantum optics experiments. It includes fundamental physical constants, overall physical properties, and detailed optical properties of the D lines (D1 and D2 transitions). The document also covers hyperfine structure, interactions with static external fields (magnetic and electric), reduction of the dipole operator, and resonance fluorescence. Key topics include: 1. **Fundamental Physical Constants and Properties**: Values of CODATA-recommended physical constants, mass, density, melting point, boiling point, heat capacities, vapor pressure, and ionization limit. 2. **Optical Properties**: Detailed tables for the D1 and D2 transitions, including frequency, vacuum wavelength, wave number, and air wavelength. 3. **Hyperfine Structure**: Energy level splittings, hyperfine energy shifts, and interaction with magnetic and electric fields. 4. **Dipole Operator Reduction**: Reduced matrix elements for dipole transitions between hyperfine sublevels. 5. **Resonance Fluorescence**: Symmetries of the dipole operator, effective dipole moments, optical Bloch equations, and scattering rates. 6. **Optical Pumping**: Analysis of optical pumping in atomic vapor, including steady-state populations, scattering rates, and angular distributions. The document is intended for researchers and students working in quantum optics and related fields, providing a detailed and accurate reference for the physical and optical properties of Rb-85.This document provides a comprehensive reference on the physical and optical properties of rubidium-85 (Rb-85), particularly relevant to quantum optics experiments. It includes fundamental physical constants, overall physical properties, and detailed optical properties of the D lines (D1 and D2 transitions). The document also covers hyperfine structure, interactions with static external fields (magnetic and electric), reduction of the dipole operator, and resonance fluorescence. Key topics include: 1. **Fundamental Physical Constants and Properties**: Values of CODATA-recommended physical constants, mass, density, melting point, boiling point, heat capacities, vapor pressure, and ionization limit. 2. **Optical Properties**: Detailed tables for the D1 and D2 transitions, including frequency, vacuum wavelength, wave number, and air wavelength. 3. **Hyperfine Structure**: Energy level splittings, hyperfine energy shifts, and interaction with magnetic and electric fields. 4. **Dipole Operator Reduction**: Reduced matrix elements for dipole transitions between hyperfine sublevels. 5. **Resonance Fluorescence**: Symmetries of the dipole operator, effective dipole moments, optical Bloch equations, and scattering rates. 6. **Optical Pumping**: Analysis of optical pumping in atomic vapor, including steady-state populations, scattering rates, and angular distributions. The document is intended for researchers and students working in quantum optics and related fields, providing a detailed and accurate reference for the physical and optical properties of Rb-85.