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19 April 2024 |
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Measuring the Neutron's Mean Square Charge Radius Using Neutron Interferometry | | F.E. Wietfeldt
; M. Huber
; T.C. Black
; H. Kaiser
; M. Arif
; D.L. Jacobson
; S.A. Werner
; | | Date: |
14 Sep 2005 | | Subject: | nucl-ex | | Abstract: | The neutron is electrically neutral, but its substructure consists of charged quarks so it may have an internal charge distribution. In fact it is known to have a negative mean square charge radius (MSCR), the second moment of the radial charge density. In other words the neutron has a positive core and negative skin. In the first Born approximation the neutron MSCR can be simply related to the neutron-electron scattering length b_ne. In the past this important quantity has been extracted from the energy dependence of the total transmission cross-section of neutrons on high-Z targets, a very difficult and complicated process. A few years ago S.A. Werner proposed a novel approach to measuring b_ne from the neutron’s dynamical phase shift in a perfect crystal close to the Bragg condition. We are conducting an experiment based on this method at the NIST neutron interferometer which may lead to a five-fold improvement in precision of b_ne and hence the neutron MSCR. | | Source: | arXiv, nucl-ex/0509018 | | Services: | Forum | Review | PDF | Favorites | |
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