Abstract
The first measurement of the momentum distribution for one-neutron removal from at performed at GSI, Darmstadt is reported. The observed distribution has a width (FWHM) of in the projectile rest frame and a one-neutron removal cross section of . The results are well explained with a nearly pure neutron spectroscopic factor of within the eikonal model. This large -wave probability shows a spherical shell closure thereby confirming earlier suggestions that is a new doubly magic nucleus.
- Received 8 November 2008
DOI:https://doi.org/10.1103/PhysRevLett.102.152501
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