摘要:

A new type of instrument for measuring ionization currents is described. Whenever a charge is placed upon the electrode of the ionization chamber, an alternating voltage is obtained by electrostatic translation of the motion of a reed. The alternating voltage is amplified in an amplifier containing only standard radio parts and used to measure the ionization current by a condenser balance method. An instrument tested in the laboratory measured a quantity of 1.5 × 10−12coulombs with about the same accuracy as a DuBridge and Brown instrument. The readings were recorded automatically and could be taken as rapidly as every three seconds with no linearity correction.

ISSN:1923-4287    

DOI:10.1139/cjr41a-002

出版商:NRC Research Press    

年代:1941

数据来源: NRC

摘要:

In a discharge in helium with a trace of boron trichloride and hydrogen three new bands are found at 3415 Å, 3396 Å, and 3099 Å. Measurements of these bands show that they are due to two new electronic transitions of the BH molecule. The upper states of both transitions are previously unknown1Σ+states. The lower state of both transitions is the same and is a known1Π state. The rotational constants of both new states have been determined and their electron configuration is suggested.

ISSN:1923-4287    

DOI:10.1139/cjr41a-003

出版商:NRC Research Press    

年代:1941

数据来源: NRC