Document Type



Master of Science (MS)



First Advisor's Name

Kenneth A. Hardy

First Advisor's Committee Title

Committee Chair

Second Advisor's Name

Xuewen Wang

Third Advisor's Name

Yifu Zhu

Fourth Advisor's Name

John T. Landrum

Date of Defense



Dissociative recombination reaction has been studied theoretically and experimentally for about four decades. Because of the complexity of this process there is not yet a definite agreement between theory and experiment. In this work, dissociative recombination (DR) of helium molecular ion in thermal plasma was studied using Time of Flight (TOF) spectroscopy. This method allowed the identification of the final atom states products of DR. We found the following final products of the DR of the molecular ion: He(3S; 1s3s), He(1S; 1s3s), He(3P; 1s3p), He(3D; 1s3d), He(1D; 1s3d), He(1P; 1s3p), He(3S; 1s2s), He(1S; 1s2s) and possibly He(1S; 1s2). Results similar to ours were obtained in experiments done using optical methods. The actual theoretical models predicts only n=2 manifold states. Further theoretical modeling for this complex process is required.




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