g-factor measurements on relativistic isomeric beams produced by fragmentation and U-fission: the g-Rising project at GSI

Neyens, G.; Atanasova, L.; Balabanski, D. L.; Becker, F.; Bednarczyk, P.; Caceres, L.; Doornenbal, P.; Gerl, J.; Gorska, M.; Grebosz, J.; Hass, M.; Ilie, G.; Kurz, N.; Kojouharov, I.; Lozeva, R.; Maj, A.; Pfutzner, M.; Pietri, S.; Podolyak, Zs.; Prokopowicz, W.; Saitoh, T. R.; Schaffner, H.; Simpson, G.; Vermeulen, N.; Werner-Malento, E.; Walker, J.; Wollersheim, H. J.; Bazzacco, D.; Benzoni, G.; Blazhev, A.; Blasi, N.; Bracco, A.; Brandau, C.; Camera, F.; Chamoli, S. K.; Chmel, S.; Crespi, F. C. L.; Daugas, J. M.; Rydt, M. de; Detistov, P.; Fahlander, C.; Farnea, E.; Georgiev, G.; Gladnishki, K.; Hoischen, R.; Ionescu-Bujor, M.; Iordachescu, A.; Jolie, J.; Jungclaus, A.; Kmiecik, M.; Krasznahorkay, A.; Kulessa, R.; Lakshmi, S.; Lo Bianco, G.; Mallion, S.; Mazurek, K.; Meczynski, W.; Montanari, D.; Myalsky, S.; Perru, O.; Rudolph, D.; Rusev, G.; Saltarelli, A.; Schwengner, R.; Styczen, J.; Turzo, K.; Valiente-Dobon, J. J.; Wieland, O.; Zieblinski, M.

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g-factor measurements on relativistic isomeric beams produced by fragmentation and U-fission: the g-Rising project at GSI

Neyens, G.; Atanasova, L.; Balabanski, D. L.; Becker, F.; Bednarczyk, P.; Caceres, L.; Doornenbal, P.; Gerl, J.; Gorska, M.; Grebosz, J.; Hass, M.; Ilie, G.; Kurz, N.; Kojouharov, I.; Lozeva, R.; Maj, A.; Pfutzner, M.; Pietri, S.; Podolyak, Z.; Prokopowicz, W.; Saitoh, T. R.; Schaffner, H.; Simpson, G.; Vermeulen, N.; Werner-Malento, E.; Walker, J.; Wollersheim, H. J.; Bazzacco, D.; Benzoni, G.; Blazhev, A.; Blasi, N.; Bracco, A.; Brandau, C.; Camera, F.; Chamoli, S. K.; Chmel, S.; Crespi, F. C. L.; Daugas, J. M.; de Rydt, M.; Detistov, P.; Fahlander, C.; Farnea, E.; Georgiev, G.; Gladnishki, K.; Hoischen, R.; Ionescu-Bujor, M.; Iordachescu, A.; Jolie, J.; Jungclaus, A.; Kmiecik, M.; Krasznahorkay, A.; Kulessa, R.; Lakshmi, S.; Lo Bianco, G.; Mallion, S.; Mazurek, K.; Meczynski, W.; Montanari, D.; Myalsky, S.; Perru, O.; Rudolph, D.; Rusev, G.; Saltarelli, A.; Schwengner, R.; Styczen, J.; Turzo, K.; Valiente-Dobon, J. J.; Wieland, O.; Zieblinski, M.

Abstract

Within the RISING (Rare ISotope INvestigations @ GSI) Collabora-tion at GSI, g factor measurements have been performed on isomeric states in neutron-rich isotopes approaching 132 Sn and in the neutron deficient Pb-region (the g-RISING campaign). We present the experimental technique and some typical aspects related to such studies on relativistic beams selected with the FRS fragment separator. First results are presented for the (19/2+ ) 4.5 µs isomeric state in 127 Sn, which has been produced by means of fission of a relativistic 238 U beam on the one hand, and by the fragmentation of a relativistic 136 Xe beam on the other hand. Spin-alignment has been observed in both reactions. It was the first time that spin-alignment has been established in a relativistic fission reaction.

Keywords: Nuclear structure; radioactive beams; g-factor measurements

Contribution to proceedings
Zakopane Conference on Nuclear Physics, 04.-10.10.2006, Zakopane, Poland
Acta Physica Polonica B 38, 1237-1245

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