EPJ

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EPJ A - Hadrons and Nuclei
Hadrons and Nuclei


Eur. Phys. J. A 13, 9-14 (2002)

Nuclear structure in the vicinity of the $\mth{N=Z}$ line in the $\mth{A=90\mbox{--}100}$ region

A. Johnson

Department of Physics, Royal Institute of Technology, S-104 05 Stockholm, Sweden

(Received: 1 May 2001)

Abstract
Neutron-deficient nuclei in the mass region $A\approx90$-100 exhibit a large variety of phenomena. In this region the heaviest N=Z nuclei are identified and enhanced neutron-proton correlations are expected when protons and neutrons occupy identical orbitals. A variety of nuclear shapes are predicted and observed for $A \leq 91$, including superdeformed shapes. The nucleus $\chem{^{100}Sn}$ is the heaviest N=Z doubly magic nucleus believed to be bound. Knowledge of the shell structure around $\chem{^{100}Sn}$ is of utmost importance for understanding the nuclear shell model. New results on both the N=Z nucleus $\chem{^{88}Ru}$, superdeformed structures in $A\approx90$ nuclei as well as the first result on the level structure in $\chem{^{103}Sn}$, and an extended level structure in $\chem{^{102}In}$ are presented. The limitations of using stable beams and targets and the possibilities with new radioactive beams are briefly outlined.

PACS
21.10.Re - Collective levels.
21.60.Cs - Shell model.
27.50.+e - $59 \leq A \leq 89$ .
27.60.+j - $90 \leq A \leq 149$ .

© Società Italiana di Fisica, Springer-Verlag 2002

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