Details

Title

LSRH ammonia absorption frequency standard

Date of Issue

1954

Linked Datasets

Photo of the ammonia absorption frequency standard  

Photo of spectrometer used with ammonia absorption cell  

Photo of LSRH ammonia absorption cell  

Device Type

frequency

Operating Principle

cell

Reference Species

ammonia

Quantum Transition

J=3, K=3

Reference Frequency

23 870 129 420

Fabrication Source

noncommercial

Host Institution

LSRH

Status Timeline

Project iniated: late 1952; work starts: beginning 1953; operational: 1954

Technical specifications: stability, precision

Stability: 2E-9 per day

Identifiers

https://libra.unine.ch/handle/20.500.14713/99872