Evolution of the Ar isotopic chain: the N=28 shell gap south of 48Ca

• Published in: Nuclear physics. A 2010-03, Vol.834 (1), p.69c-71c
• Main Authors: Mengoni, D., Valiente-Dobón, J.J., Gadea, A., Lenzi, S.M., Lunardi, S., Broda, R., Dewald, A., Pissulla, T., Angus, L., Aydin, S., Bazzacco, D., Benzoni, G., Bizzeti, P.G., Bizzeti-Sona, A.M., Corradi, L., Crespi, F., de Angelis, G., Farnea, E., Fioretto, E., Goergen, A., Gottardo, A., Grodner, E., Królas, W., Leoni, S., Mason, P., Montanari, D., Montagnoli, G., Napoli, D.R., Obertelli, A., Pawłat, T., Pollarolo, G., Recchia, F., Algora, A., Rubio, B., Sahin, E., Scarlassara, F., Smith, J.F., Stefanini, A.M., Szilner, S., Ur, C.A., Wady, P.T., Wrzesiński, J.
• Format: Article
• Language: English
• ISSN: 0375-9474
• DOI: 10.1016/j.nuclphysa.2010.01.020

The lifetimes of the first excited states of the Z = 18 44Ar and 46Ar isotopes have been determined using a novel technique that combines the Recoil Distance Doppler Shift method with the CLARA-PRISMA spectrometers for Multinucleon Transfer Reactions. The B(E2) values extracted for the 2 + → 0 + transitions in both nuclei, as well as for higher excites states in 44Ar, are discussed and compared with the available experimental results and with the new large-scale shell-model calculations.