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Updated: Jun 22, 2026

Preparing an Isotopically Pure 229Th Ion Beam for Studies of 229mTh
Published on: May 3, 2019
One-neutron removal measurement reveals 24O as a new doubly magic nucleus
R Kanungo1, C Nociforo, A Prochazka
1Astronomy and Physics Department, Saint Mary's University, Halifax, NS B3H 3C3, Canada. ritu@triumf.ca
Abstract:
The first measurement of the momentum distribution for one-neutron removal from (24)O 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 2s_{1/2} 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 (24)O is a new doubly magic nucleus.
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