New mass measurements at the neutron drip-line

• Published in: The European physical journal. A, Hadrons and Nuclei Vol. 25; no. S1; pp. 23 - 26
• Main Authors: Savajols, H., Jurado, B., Mittig, W., Baiborodin, D., Catford, W., Chartier, M., Demonchy, C. E., Dlouhy, Z., Gillibert, A., Giot, L., Khouaja, A., Lépine-Szily S. Lukyanov, A., Mrazek, J., Orr, N., Penionzhkevich, Y., Pita, S., Rousseau, M., Roussel-Chomaz, P., Villari, A. C. C.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Springer 01.01.2005; EDP Sciences ; Springer [1998-....]
• Subjects: Nuclear Experiment; Physics
• ISSN: 1434-6001; 1434-601X
• DOI: 10.1140/epjad/i2005-06-189-6

A new SPEG mass measurement experiment has been performed to determine masses closer to the neutron drip-line in the mass region A $\sim$ 10-50. The precision of 37 masses has been improved and 8 masses were measured for the first time. The region covered was motivated by the study of shell structure and of shape coexistence in the region of closed shells N = 20 and N = 28. The evolution of the two neutron separation energies and the shell correction energy have been studied as a function of the neutron number. The results thus obtained provide a means of identifying, in exotic nuclei, new nuclear structure effects that are well illustrated by the changes of the conventional magic structure.