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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), ARTN 4.

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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
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
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
Hjorth-Jensen, M
Date : 1 August 2010
DOI : 10.1209/0295-5075/91/42001
Uncontrolled Keywords : Science & Technology, Physical Sciences, Physics, Multidisciplinary, Physics, SPIN-ALIGNMENT, FRAGMENTATION, GSI, FISSION, ISOMER, BEAMS
Additional Information : Copyright EPLA, 2010
Depositing User : Symplectic Elements
Date Deposited : 14 Sep 2012 14:44
Last Modified : 31 Oct 2017 14:39

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