摘要:

In a discharge through helium with traces of boron trichloride and nitrogen two new band systems (a triplet system and a singlet system) were found which are shown to be due to the BN molecule. The first system represents a3II–3II transition similar to the Swan bands of the C2molecule with which BN is isoelectronic. A vibrational and rotational analysis of this system is carried out and yields the formula for the heads:and theBand α values and internuclear distances:,, α′ = 0.010, α″ = 0.025,,. An analysis of the singlet system has not as yet been possible.

ISSN:1923-4287    

DOI:10.1139/cjr40a-018

出版商:NRC Research Press    

年代:1940

数据来源: NRC

摘要:

Theoretical analysis has predicted that considerable variation is permissible in the distance between the linear light source (a slit) and the "collimating" lens comprising a commonly used spectrophotometric system. This prediction has been tested experimentally over a wide range of source-to-lens distances. The results are in accord with the theoretical expectation.

ISSN:1923-4287    

DOI:10.1139/cjr40a-019

出版商:NRC Research Press    

年代:1940

数据来源: NRC