Accession Number : AD0702816

Title :   THE STUDY OF NITROGEN(A triplet Sigma) GENERATED BY 1849 ANGSTROM MERCURY PHOTOSENSITIZATION.

Descriptive Note : Final technical rept.,

Corporate Author : BOSTON UNIV MASS

Personal Author(s) : Lichtin,Norman N. ; Hoffman,Morton Z.

Report Date : 02 MAR 1970

Pagination or Media Count : 11

Abstract : The possibility that energy transfer from Hg(singlet P(1)) produces N2(A triplet Sigma(u)(+)) was suggested by emission of 2537 A radiation when mercury vapor was irradiated by 1849 A mercury resonance radiation. However, the same scintillation phenomenon is observed with many quenchers including rare gases. The efficiency of quenching of 1849 A mercury fluorescence does not depend on the chemical nature of the quenching gas but only on its mass. Satellite fluorescence bands near 1849 A are easily induced by various quenchers. The absence of observable slow decay of 2537 A scintillation when 1849 A irradiation of mercury vapor and N2 is abruptly terminated suggests that N2(A triplet Sigma(u)(+)) is not involved in the scintillation process. All data can be accommodated by collision induced HG(singlet P(1)) to Hg(triplet P(1)) intersystem crossing but this mechanism has not yet been confirmed. (Author)

Descriptors :   (*NITROGEN, FLUORESCENCE), (*MERCURY, *FLUORESCENCE), QUENCHING(INHIBITION), EMISSIVITY, MOLECULAR ORBITALS

Subject Categories : Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE