301. Lifetime measurements of the yrast 8+ and 9+ states in 70As.
- Author
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Morse, C., Iwasaki, H., Lemasson, A., Baugher, T., Bazin, D., Berryman, J. S., Dewald, A., Fransen, C., Gade, A., McDaniel, S., Nichols, A. J., Ratkiewicz, A., Stroberg, S. R., Voss, P., Wadsworth, R., Weisshaar, D., Wimmer, K., and Winkler, R.
- Subjects
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YRAST states , *NUCLEAR particle research , *NUCLEAR reactions , *BERYLLIUM , *RUBIDIUM - Abstract
The lifetimes of the yrast 8+ and 9+ states of 70As have been measured via the γ-ray lineshape method following population by the 9Be(78Rb,70As) reaction at 101.6 MeV/nucleon. The strength of the E18+→7- transition is found to be B(E1)=1.3(5)x 10-5 e²fm² or 1.2(4) x 10-5 Weisskopf units (W.u.) while the 9+→8+ M1 transition is found to have a strength of B(M1)=1.5(8) μN² or 0.85(42) W.u. The implications for the structure of these states is discussed and found to be consistent with an assignment to a πg9/2vg9/2 configuration. [ABSTRACT FROM AUTHOR]
- Published
- 2014
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