One-neutron removal measurement reveals 24O as a new doubly magic nucleus.
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.
Kanungo
R
R
Astronomy and Physics Department, Saint Mary's University, Halifax, NS B3H 3C3, Canada. ritu@triumf.ca
Nociforo
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Prochazka
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Aumann
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Boutin
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Cortina-Gil
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Davids
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Diakaki
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Farinon
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Geissel
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Gernhäuser
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Gerl
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Janik
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Jonson
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Kindler
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Knöbel
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Krücken
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Lantz
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Lenske
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Litvinov
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Lommel
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Mahata
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Maierbeck
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Musumarra
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Nilsson
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Otsuka
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Perro
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Scheidenberger
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Strmen
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Szarka
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Tanihata
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Utsuno
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Weick
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Winkler
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