Phys. Rev. Lett. 102, 152501 (2009) [4 pages]One-Neutron Removal Measurement Reveals 24O as a New Doubly Magic Nucleus
The first measurement of the momentum distribution for one-neutron removal from 24O at 920A MeV performed at GSI, Darmstadt is reported. The observed distribution has a width (FWHM) of 99±4 MeV/c in the projectile rest frame and a one-neutron removal cross section of 63±7 mb. The results are well explained with a nearly pure 2s1/2 neutron spectroscopic factor of 1.74±0.19 within the eikonal model. This large s-wave probability shows a spherical shell closure thereby confirming earlier suggestions that 24O is a new doubly magic nucleus. © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.102.152501
DOI:
10.1103/PhysRevLett.102.152501
PACS:
25.60.Gc, 21.10.Jx, 21.60.Cs, 27.30.+t
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