Abstract.
The β--decay of 147Cs to 147Ba has been studied by means of γ- and X-ray spectroscopy. A new level scheme of 147Ba is significantly modified and extended in comparison to the one previously reported. The Advanced Time-Delayed βγγ(t) method has been applied to measure half-lives of the 46.2 and 85.4 keV levels in 147Ba yielding T 1/2 of 510(80) ps and 370(100) ps, respectively. The lifetime results combined with the deduced internal conversion coefficients allowed to assign M1 multipolarity to three γ transitions. The B(M1) values obtained for the 39.2, 46.2 and 85.4 keV transitions range from 0.017 to 0.043 W.u. and represent typical B(M1) strength in the Ba-Er region. Model calculations using a shell correction approach with the axially deformed Woods-Saxon potential predict for 147Ba an octupole deformed ground state with β3 = 0.11.
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W. Nazarewicz, P. Olanders, I. Ragnarsson, J. Dudek, G.A. Leander, P. Möller, E. Ruchowska, Nucl. Phys. A 429, 269 (1984).
W.R. Phillips, I. Ahmad, H. Emling, R. Holzmann, R.V.F. Janssens, T.-L. Khoo, M.W. Drigert, Phys. Rev. Lett. 57, 3257 (1986).
P. Schüler, Ch. Lauterbach, Y.K. Agarwal, J. De Boer, K.P. Blume, P.A. Butler, K. Euler, Ch. Fleischmann, C. Gunther, E. Hauber, H.J. Maier, M. Marten-Tolle, Ch. Schandera, R.S. Simon, R. Tolle, P. Zeyen, Phys. Lett. B 174, 241 (1986).
H. Mach, W. Nazarewicz, D. Kusnezov, M. Moszyński, B. Fogelberg, M. Hellström, L. Spanier, R.L. Gill, R.F. Casten, A. Wolf, Phys. Rev. C 41, R2469 (1990).
P.A. Butler, W. Nazarewicz, Nucl. Phys. A 533, 249 (1991).
G.A. Leander, W. Nazarewicz, P. Olanders, I. Ragnarsson, J. Dudek, Phys. Lett. B 152, 284 (1985).
S. Ćwiok, W. Nazarewicz, Nucl. Phys. A 496, 367 (1989).
S.J. Zhu, Q.H. Lu, J.H. Hamilton, A.V. Ramayya, L.K. Peker, M.G. Wang, W.C. Ma, B.R.S. Babu, T.N. Ginter, J. Kormicki, D. Shi, J.K. Deng, W. Nazarewicz, J.O. Rasmussen, M.A. Stoyer, S.Y. Chu, K.E. Gregorich, M.F. Mohar, S. Asztalos, S.G. Prussin, J.D. Cole, R. Aryaeinejad, Y.K. Dardenne, M. Drigert, K.J. Moody, R.W. Lougheed, J.F. Wild, N.R. Johnson, I.Y. Lee, F.K. McGowan, G.M. Ter-Akopian, Yu.Ts. Oganessian, Phys. Lett. B 357, 273 (1995).
M.A. Jones, W. Urban, J.L. Durell, M. Leddy, W.R. Phillips, A.G. Smith, B.J. Varley, I. Ahmad, L.R. Morss, M. Bentaleb, E. Lubkiewicz, N. Schulz, Nucl. Phys. A 605, 133 (1996).
W. Urban, T. Rzaca-Urban, J.L. Durell, W.R. Phillips, A.G. Smith, B.J. Varley, N. Schulz, I. Ahmad, Phys. Rev. C 69, 017305 (2004).
W. Kurcewicz, Hyperfine Interact. 129, 175 (2000).
F. Schussler, B. Pfeiffer, H. Lawin, E. Monnand, J. Münzel, J.A. Pinston, K. Sistemisch, Proceedings of the 4th International Conference on Nuclei Far from Stability, Helsingør, Denmark, 1981, CERN Report 81-09, edited by P.G. Hansen, O.B. Nielsen (1981) p. 589.
G. Audi, O. Bersillon, J. Blachot, A.H. Wapstra, Nucl. Phys. A 729, 3 (2003).
B.R.S. Babu, S.J. Zhu, A.V. Ramayya, J.H. Hamilton, L.K. Peker, M.G. Wang, T.N. Ginter, J. Kormicki, W.C. Ma, J.D. Cole, R. Aryaeinejad, K. Butler-Moore, Y.X. Dardenne, M.W. Drigert, G.M. Ter-Akopian, Yu.Ts. Oganessian, J.O. Rasmussen, S. Asztalos, I.Y. Lee, A.O. Macchiavelli, S.Y. Chu, K.E. Gregorich, M.F. Mohar, S. Prussin, M.A. Stoyer, R.W. Lougheed, K.J. Moody, J.F. Wild, Phys. Rev. C 54, 568 (1996).
A. Syntfeld, H. Mach, R. Kaczarowski, W. Kurcewicz, W. Płóciennik, W. Urban, B. Fogelberg, P. Hoff, Nucl. Phys. A 710, 221 (2002).
A. Syntfeld, H. Mach, W. Kurcewicz, B. Fogelberg, W. Płóciennik, E. Ruchowska, Phys. Rev. C 68, 024304 (2003).
B. Fogelberg, M. Hellström, L. Jacobsson, D. Jerrestam, L. Spanier, G. Rudstam, Nucl. Instrum. Methods B 70, 137 (1992).
E. der Mateosian, L.K. Peker, Nucl. Data Sheets 66, 705 (1992).
H. Mach, R.L. Gill, M. Moszyński, Nucl. Instrum. Methods Phys. Res. A 280, 49 (1989).
M. Moszyński, H. Mach, Nucl. Instrum. Methods Phys. Res. A 277, 407 (1989).
H. Mach, F.K. Wohn, G. Molnar, K. Sistemich, J.C. Hill, M. Moszyński, R.L. Gill, W. Krips, D.S. Brenner, Nucl. Phys. A 523, 197 (1991).
R.S. Hager, E.C. Seltzer, Nucl. Data A 4, 1 (1968).
P.M. Endt, At. Data Nucl. Data Tables 26, 47 (1981).
T. Duguet, P. Bonche, P.-H. Heenen, J. Meyer, Phys. Rev. C 65, 014310 (2002).
A.C. Mueller, F. Buchinger, W. Klempt, E.W. Otten, R. Neugart, C. Ekstrom, J. Heinemeier, Nucl. Phys. A 403, 234 (1983).
S. Ćwiok, J. Dudek, W. Nazarewicz, J. Skalski, T. Werner, Comput. Phys. Commun. 46, 379 (1987).
R. Bengtsson, J. Dudek, W. Nazarewicz, P. Olanders, Phys. Scr. 39, 196 (1989).
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Syntfeld, A., Mach, H., Kurcewicz, W. et al. The βdecay of 147Cs to 147Ba. Eur. Phys. J. A 23, 481–490 (2005). https://doi.org/10.1140/epja/i2004-10112-y
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DOI: https://doi.org/10.1140/epja/i2004-10112-y