Rb87

There are two main transitions for the Rb 87 used in various experiments: $5 S_{1/2} \rightarrow 5P_{1/2}$ (D1) and $5 S_{1/2} \rightarrow 5P_{3/2}$ (D2 respectivly). Mass of Rubidium is 85.4678(3) unified atomic mass units, what is equal to $m=85.4678\cdot 1.66 \cdot 10^{-27} \text{kg}\approx 141.9 \cdot 10^{-27} \text{kg}$ . Radius of Rubidium atom is 248 pm or 4.68 Bohr radius's.

Available Rubidium Cells

Cell number	Company name	Item code	Isotope	Length, cm	Quality/Current state
cell-1	Triad Technologies	TT-RB87/Kr-0.5T-44-Q-R	Rb-87		Poor (April 2014)
cell-2	Triad Technologies	TT-RB87/Ne-5T-Q-AR	Rb-87		Medium (April 2014)
cell-3	Triad Technologies	TT-RB87/Ne-30T-25x50-AR	Rb-87	$A=B+C$	Good (June 20, 2014)
cell-4	Triad Technologies	TT-RB85-50-P	Rb-85		Good (June 20, 2014)
cell-5	Thorlabs		Natural Rb	7.18
cell-6	Velichansky		Natural Rb	2.5
cell-7
cell-8	TT		RB85
cell-9
cell-10

The level structure

**Rb 87 hyperfine structure**
Error creating thumbnail: Unable to save thumbnail to destination Rb87 D1 transition hyperfine structure, with frequency splittings between the hyperfine energy levels. The approximate Lande gF -factors for each level are also given, with the corresponding Zeeman splittings between adjacent magnetic sublevels.	Error creating thumbnail: Unable to save thumbnail to destination Rb87 D2 transition hyperfine structure, with frequency splittings between the hyperfine energy levels. The approximate Lande gF -factors for each level are also given, with the corresponding Zeeman splittings between adjacent magnetic sublevels.

Optical Properties

Property	Symbol	D1 line	D2 Line
Frequency	$\omega_0$	2π · 377.107 463 5(4) THz	2π · 384.230 484 468 5(62) THz
Wavelength	$\lambda$	794.978 850 9(8) nm	780.241 209 686(13) nm
Transition Energy	$\hbar \omega_0$	1.559 590 99(6) eV	1.589 049 439(58) eV
Decay Rate/ Natural Line Width (FWHM)	$\Gamma$	36.10(5) 10^6 / 2π · 5.746(8) MHz	38.11(6) × 10^6 s^-1 / 2π · 6.065(9) MHz
Absorption oscillator strength	$f$	0.3420(14)	0.6956(15)
Recoil Velocity	$v_r$	5.7754 mm/s	5.8845 mm/s
Recoil Energy	$\omega_r$	2π · 3.6325 kHz	2π · 3.7710 kHz
Recoil Temperature	$T_r$	348.66 nK	361.96 nK
Doppler Temperature	$T_D$		146 μK
Doppler Shift for recoil speed	$\Delta \omega$	2π · 7.2649 kHz	2π · 7.5419 kHz
Frequency shift for standing wave moving with recoil speed	$\Delta\omega_{sw}(v_{sw} = v_r)$	2π · 14.530 kHz	2π · 15.084 kHz