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Published January 1993 | public
Journal Article Open

He→3(e→e′) quasielastic asymmetry


Measurements of the spin-dependent asymmetry in scattering longitudinally polarized electrons from polarized He3 at quasielastic kinematics are reported. The measurements were made at two kinematics and spin angles, one sensitive to the helicity-dependent transverse-longitudinal interference response function, RTL′, and the other to the helicity-dependent transverse response function, RT′. For the experiment a metastability exchange optically pumped polarized He3 target was used; a general discussion of the technique used to polarized the He3, along with the details of the design and operation of the target system, are presented here. A comparison is made of the world's data on the He→3(e→,e′) quasielastic asymmetry with several theoretical predictions, including calculations that use the plane wave impulse approximation and a fully spin-dependent spectral function. There is good agreement between data and theory at the current level of experimental precision.

Additional Information

©1993 The American Physical Society Received 11 September 1992 We would like to thank B. Blankleider and R. Woloshyn for providing us with their computer code. We also thank T. Gentile and H. Gao for their help with the analysis. The research was supported by the National Science Foundation Grant No. PHY88-17296 (Caltech) and by the U.S. Department of Energy Contract No. DEAC02-76ER03069 (MIT).


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