Hydrogen maser wall shift experiments and determination of the unperturbed hyperfine frequency of the ground state of the hydrogen atom

Conference · Mon Dec 01 00:00:00 EST 1980 · IEEE Trans. Instrum. Meas.; (United States)

OSTI ID:5500533

Cheng, Y M; Hua, Y L; Chen, C B; Gao, J H; Shen, W

Experiments on hydrogen maser wall shift are described in detail. Values of K(40 C) -293 + or - 17 mHz.cm and a(40 C) (-17 + or 2) x 10 to the -3rd per deg C were obtained. The unperturbed hyperfine frequency of the ground state of the hydrogen atom was obtained by comparing five hydrogen masers to Loran C signals for one month. The average value with respect to TAI is 1,420,405,751.768 + or - 0.002 Hz.

• Research Organization: Shanghai Bureau of Metrology, Hydrogen Maser Research Group, Shanghai, Communist China
• OSTI ID: 5500533
• Report Number(s): CONF-8006222-
• Journal Information: IEEE Trans. Instrum. Meas.; (United States), Vol. IM-29; Conference: Conference on precision electromagnetic measurements, Braunschweig, F.R. Germany, 23 Jun 1980
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
HYDROGEN
HYPERFINE STRUCTURE
ATOM COLLISIONS
FREQUENCY MEASUREMENT
GROUND STATES
MASERS
WALLS
WAVE FUNCTIONS
AMPLIFIERS
COLLISIONS
ELECTRONIC EQUIPMENT
ELEMENTS
ENERGY LEVELS
EQUIPMENT
FUNCTIONS
MICROWAVE AMPLIFIERS
MICROWAVE EQUIPMENT
NONMETALS
640302* - Atomic
Molecular & Chemical Physics- Atomic & Molecular Properties & Theory