APS » PROLA » Phys. Rev. Lett. » Volume 86 » Issue 24

Phys. Rev. Lett. 86, 5446 - 5449 (2001)

Measurement of the Elastic Magnetic Form Factor of 3He at High Momentum Transfer
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I. Nakagawa2 *, J. Shaw1, S. Churchwell1 †, X. Jiang1 ‡, B. Asavapibhop1, M. C. Berisso1 §, P. E. Bosted1, K. Burchesky1, F. Casagrande3, A. Cichocki4, R. S. Hicks1, A. Hotta1, T. Kobayashi5, R. A. Miskimen1, G. A. Peterson1, S. E. Rock1, T. Suda2 **, T. Tamae2, W. Turchinetz3, and K. Wang4
1Department of Physics, University of Massachusetts, Amherst, Massachusetts, 01003
2Laboratory of Nuclear Science, Tohoku University, Sendai 982-0826, Japan
3MIT-Bates Linear Accelerator Center, Middleton, Massachusetts 01949
4Department of Physics, University of Virginia, Charlottesville, Virginia 22901
5College of Radiology, Teikyo University, Tokyo 173-8605, Japan

Received 29 August 2000; revised 19 March 2001

New electron scattering measurements have been made that extend data on the 3He elastic magnetic form factor up to Q2  =  42.6 fm-2. These new data test theoretical conjectures regarding non-nucleonic effects in the three-body system. The very small cross sections, as low as 10-40 cm2/sr, required the use of a high-pressure cryogenic gas target and a detector system with excellent background rejection capability. No existing theoretical calculation satisfactorily accounts for all the available data.


©2001 The American Physical Society

URL: http://link.aps.org/abstract/PRL/v86/p5446
DOI: 10.1103/PhysRevLett.86.5446
PACS: 27.10.+h, 25.10.+s, 25.30.Bf

* Present address: Laboratory for Nuclear Science, MIT, Cambridge, Massachusetts 02139.
† Present address: Duke University, Durham, North Carolina 27708.
‡ Present address: Rutgers, The State University of New Jersey, Piscataway, New Jersey 08855.
§ Present address: Shasta College, Redding, California 96003.
** Present address: The Institute of Physical and Chemical Research, Wako 351-0198, Japan.

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