Experimental Study of Dissociative Attachment in Optically-Pumped Lithium Molecules.

reportActive / Technical Report | Accession Number: ADA131601 | Open PDF

Abstract:

Details are presented of an experimental study which has as its goal the observation of lithium negative ions by the process of dissociative attachment in optically-pumped lithium dimer molecules. A description is given of a new lithium supersonic beam apparatus with a slit nozzle and gravitational recirculation of the molten lithium. The source operates up to 900 degrees C and yields a lithium density of 31 x 10 to the 14th power cm at 10 cm downstream from the slit. The beam density is modelled as a function of spatial coordinates. Two- and three-step photoionization of lithium dimers and lithium atoms has been performed using multiple, tunable nitrogen-pumped dye lasers. An electron density of up to 310 to the 10th power cm has been created in the beam.

Author(s):
Mcgeoch, Malcolm W. ; Schlier, Robert E.
Author Organization(s):
AVCO EVERETT RESEARCH LAB INC EVERETT MA
Descriptive Note:
Final rept. 1 May 82-30 Apr 83,
Supplementary Note:
DOI: 10.21236/ADA131601
Pagination:
0072

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
AFOSR-TR-83-0725
Contract/Grant Number(s):
F49620-82-C-0051
Task Number(s):
A7
Project Number(s):
2301
Monitor Series:
TR-83-0725
 Subject Terms
Joint Capability Areas:
JCA_1.2.7_Experimentation; JCA_5_Command and Control; JCA_5.3_Planning
Modernization Areas:
Directed Energy; Microelectronics
Communities of Interest:
Energy and Power Technologies
Descriptor(s):
*Ion beams, *Optical pumping, *Lithium, *Molecules, *Dye lasers, Electron density, Attachment, Dissociation, Atoms, Melts, Spatial distribution, Nozzles
Field(s)/Group(s):
Optics, Nuclear Physics and Elementary Particle Physics
Keyword(s):
Lithium supersonic beams, Rotational temperature, WUAFOSR2301A7, PE61102F
Report Date:
1983 May 01