Spin-alignment and g-factor measurement of the Iπ = 12+ isomer in 192Pb produced in the relativistic-energy fragmentation of a 238U beam

M. Kmiecik, A. Maj, J. Gerl, G. Neyens, L. Atanasova, D. L. Balabanski, F. Becker, P. Bednarczyk, G. Benzoni, N. Blasi, A. Bracco, S. Brambilla, L. Caceres, F. Camera, M. Ciemała, F. C.L. Crespi, S. K. Chamoli, S. Chmel, J. M. Daugas, P. DetistovP. Doornenbal, G. Georgiev, K. Gladnishki, M. Górska, H. Grawe, J. Grȩbosz, M. Hass, R. Hoischen, G. Ilie, M. Ionescu-Bujor, J. Jolie, I. Kojuharov, A. Krasznahorkay, R. Kulessa, M. Lach, S. Lakshmi, S. Leoni, G. Lo Bianco, R. Lozeva, K. H. Maier, S. Mallion, K. Mazurek, W. Mȩczyński, B. Million, D. Montanari, S. Myalski, C. Petrache, M. Pfützner, S. Pietri, Zs Podolyák, W. Prokopowicz, D. Rudolph, N. Saito, T. R. Saito, A. Saltarelli, G. S. Simpson, J. Styczeń, N. Vermeulen, E. Werner-Malento, O. Wieland, H. J. Wollersheim, M. Ziȩbliński

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Abstract

The feasibility of measuring g -factors using the TDPAD method applied to high-energy, heavy fragmentation products is explored. The 2623 keV Iπ = 12+ isomer in 192Pb with τ = 1.57 μs has been produced using the fragmentation of a 1A GeV 238U beam. The results presented demonstrate for the first time that such heavy nuclei produced in a fragmentation reaction with a relativistic beam are sufficiently well spin-aligned. Moreover, the rather large value of the alignment, 28(10)% of the maximum possible, is preserved during the separation process allowing the determination of magnetic moments. The measured values of the lifetime, τ = 1.54(9) μs, and the g-factor, g = -0.175(20), agree with the results of previous investigations using fusion-evaporation reactions.

Original languageEnglish
Pages (from-to)153-158
Number of pages6
JournalEuropean Physical Journal A
Volume45
Issue number2
DOIs
Publication statusPublished - Jan 1 2010

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ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Kmiecik, M., Maj, A., Gerl, J., Neyens, G., Atanasova, L., Balabanski, D. L., Becker, F., Bednarczyk, P., Benzoni, G., Blasi, N., Bracco, A., Brambilla, S., Caceres, L., Camera, F., Ciemała, M., Crespi, F. C. L., Chamoli, S. K., Chmel, S., Daugas, J. M., ... Ziȩbliński, M. (2010). Spin-alignment and g-factor measurement of the Iπ = 12+ isomer in 192Pb produced in the relativistic-energy fragmentation of a 238U beam. European Physical Journal A, 45(2), 153-158. https://doi.org/10.1140/epja/i2010-11003-4