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g-factor measurements at RISING: The cases of Sn-127 and Sn-128

Atanasova, L, Balabanski, DL, Chamoli, SK, Hass, M, Simpson, GS, Bazzacco, D, Becker, F, Bednarczyk, P, Benzoni, G, Blasi, N, Blazhev, A, Bracco, A, Brandau, C, Caceres, L, Camera, F, Crespi, FCL, Detistov, P, Doornenbal, P, Fahlander, C, Farnea, E, Georgiev, G, Gerl, J, Gladnishki, KA, Gorska, M, Grebosz, J, Hoischen, R, Ilie, G, Ionescu-Bujor, M, Iordachescu, A, Jungclaus, A, Lo Bianco, G, Kmiecik, M, Kojouharov, I, Kurz, N, Lakshmi, S, Lozeva, R, Maj, A, Montanari, D, Neyens, G, Pfuetzner, M, Pietri, S, Podolyak, Z, Prokopowicz, W, Rudolph, D, Rusev, G, Saito, TR, Saltarelli, A, Schaffner, H, Schwengner, R, Tashenov, S, Valiente-Dobon, JJ, Vermeulen, N, Walker, J, Werner-Malento, E, Wieland, O, Wollersheim, HJ, Grawe, H and Hjorth-Jensen, M (2010) g-factor measurements at RISING: The cases of Sn-127 and Sn-128 EPL, 91 (4). ? - ?. ISSN 0295-5075

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Abstract

We report on g-factor measurements of the 19/2+ T1/2=4.5(3) μs isomer in 127Sn and the 10+ T1/2=2.69(23) μs isomer in 128Sn. These isomers were produced and spin-aligned in relativistic heavy-ion fragmentation at GSI and were selected and separated by the GSI fragment separator (FRS). The γ-rays of the isomeric decay were detected by the RISING γ-ray spectrometer. The method of time-differential perturbed angular distributions was utilized. The measured g-factors, g(19/2+; 127Sn)=− 0.17(2) and g(10+; 128Sn)=− 0.20(4), are compared with shell model calculations. The measured g-factors confirm the predominantly νh11/2− 2 and ν(s1/2− 1h11/2−2) character of the 10+ and 19/2− isomers in 128Sn and 127Sn, respectively. The results demonstrate the feasibility of the method for similar measurements in exotic neutron-rich nuclei.

Item Type: Article
Additional Information: Copyright EPLA, 2010
Uncontrolled Keywords: Science & Technology, Physical Sciences, Physics, Multidisciplinary, Physics, SPIN-ALIGNMENT, FRAGMENTATION, GSI, FISSION, ISOMER, BEAMS
Divisions: Faculty of Engineering and Physical Sciences > Physics
Depositing User: Symplectic Elements
Date Deposited: 14 Sep 2012 14:44
Last Modified: 23 Sep 2013 19:33
URI: http://epubs.surrey.ac.uk/id/eprint/711997

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