NDLI: Missing mass spectroscopy on oxygen isotopes beyond the proton-drip line: mirror symmetry of nuclear shell evolution

Content Provider	Springer Nature Link
Author	Suzuki, D.
Copyright Year	2012
Abstract	Missing mass spectroscopy of the proton-rich 12O and 13O nuclei was performed via the neutron transfer (p, t and (p, d reactions, respectively, using a 14O beam of 51 MeV/u at GANIL (Grand Accélérateur National d’Ions Lourds). In addition to the ground states, an excited state of 12O at 1.8(4) MeV and two excited states of 13O at 2.8(3) and 4.2(3) MeV were observed. Spin-parity and/or spectroscopic factors were obtained from the comparison of the differential cross-sections to distorted-wave calculations. The excited state of 12O with a suggested spin-parity of 0+ or 2+ has a significantly low excitation energy, indicating that the proton shell closure at Z = 8 vanishes in 12O. The spin-parity of 1/2+ was suggested for the 2.8MeV state, which implies that the proton shell gap is weak in 13O, whereas the large spectroscopic factor extracted from the 14O(p , d reaction indicates that the ground 3/2− state remains dominated by normal p-shell configurations. These features of 12O and 13O have marked similarities with their neutron-rich mirror partners 12Be and 13B, respectively, demonstrating mirror symmetry in the fading of the shell closure at magic numbers 8 near the drip lines.
Starting Page	1
Ending Page	26
Page Count	26
File Format	PDF
ISSN	14346001
Journal	The European Physical Journal A - Hadrons and Nuclei
Volume Number	48
Issue Number	9
e-ISSN	1434601X
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2012-09-28
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Nuclear Physics, Heavy Ions, Hadrons Particle and Nuclear Physics Nuclear Fusion
Content Type	Text
Resource Type	Article
Subject	Nuclear and High Energy Physics

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