1. Determination of the radius of theLi11neutron halo from pion double charge exchange
- Author
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Gibbs Wr and Hayes Ac
- Subjects
Physics ,Nuclear reaction ,education.field_of_study ,Pion ,Isotopes of lithium ,Population ,General Physics and Astronomy ,Inverse ,Neutron ,Radius ,Atomic physics ,Ground state ,education - Abstract
We have analyzed the pion-induced double-charge-exchange data for the direct population of the ground state of {sup 11}Li by the {sup 11}B({pi}{sup {minus}},{pi}{sup +}){sup 11}Li reaction. We find that the measured cross section determines the rms radius of the last two neutrons in {sup 11}Li to be 5.1{sub {minus}0.9}{sup +0.6} fm, which corresponds to a total neutron rms radius for the nucleus of 3.28{sub {minus}0.33}{sup 0.24} fm. We show that for large assumed neutron-halo radii the cross section decreases as the radius of the halo to the inverse sixth power and that a radius of 12 fm leads to a cross section which is 3 orders of magnitude smaller than that measured.
- Published
- 1991
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