Sidebands in 219Ra.

作者: M. Wieland , J. Fernández Niello , F. Riess , M. Aïche , A. Chevallier

DOI: 10.1103/PHYSREVC.45.1035

关键词: BaryonAtomic physicsNuclear reactionQuantum numberHadronElementary particleNucleonPhysicsExcited stateFermion

摘要: Excited states in {sup 219}Ra were studied by means of the 208}Pb({sup 14}C, 3{ital n}) reaction at 65 MeV. The investigation was made with 12 Compton-suppressed Ge detectors and a multicounter array. Transitions selected requiring appropriate conditions on fold sum energy. proposed level scheme shows two sidebands alternating parity structure decaying to ground-state band. It is consistent recent description framework reflection-asymmetric mean-field approach, which predicts {ital K}=1/2 band low-lying bands quantum numbers K}=3/2 K}=5/2.

参考文章(13)
G.A. Leander, W. Nazarewicz, G.F. Bertsch, J. Dudek, Low-energy collective E1 mode in nuclei Nuclear Physics. ,vol. 453, pp. 58- 76 ,(1986) , 10.1016/0375-9474(86)90029-1
G.A. Leander, R.K. Sheline, Intrinsic reflection asymmetry in odd-A nuclei Nuclear Physics. ,vol. 413, pp. 375- 415 ,(1984) , 10.1016/0375-9474(84)90417-2
G.A. Leander, R.K. Sheline, P. Möller, P. Olanders, I. Ragnarsson, A.J. Sierk, The breaking of intrinsic reflection symmetry in nuclear ground states Nuclear Physics. ,vol. 388, pp. 452- 476 ,(1982) , 10.1016/0375-9474(82)90471-7
P. D. Cottle, M. Gai, J. F. Ennis, J. F. Shriner, D. A. Bromley, C. W. Beausang, L. Hildingsson, W. F. Piel, D. B. Fossan, J. W. Olness, E. K. Warburton, Level spectrum of Ra 219 and weak coupling in the light actinide region Physical Review C. ,vol. 36, pp. 2286- 2296 ,(1987) , 10.1103/PHYSREVC.36.2286
S. Khazrouni, A. Chevallier, J. Chevallier, O. Helene, G. Ramanantsizehena, N. Schulz, Occurrence of alternating parity levels in bands of the odd-Z 219 Ac nucleus Zeitschrift f�r Physik A Atoms and Nuclei. ,vol. 320, pp. 535- 536 ,(1985) , 10.1007/BF01415734
J. Fernández-Niello, C. Mittag, F. Riess, E. Ruchowska, M. Stallknecht, Observation of parity doublets in 221Ra Nuclear Physics. ,vol. 531, pp. 164- 176 ,(1991) , 10.1016/0375-9474(91)90575-Q
M. Dahlinger, E. Kankeleit, D. Habs, D. Schwalm, B. Schwartz, R.S. Simon, J.D. Burrows, P.A. Butler, Alternating parity bands and octupole effects in 221Th and 223Th Nuclear Physics. ,vol. 484, pp. 337- 375 ,(1988) , 10.1016/0375-9474(88)90076-0
A. Celler, Ch. Briançon, J.S. Dionisio, A. Lefebvre, Ch. Vieu, J. Żylicz, R. Kulessa, C. Mittag, J. Fernandez-Niello, Ch. Lauterbach, H. Puchta, F. Riess, Yrast levels of 220Ra populated in the 208Pb(14C, 2n) reaction Nuclear Physics A. ,vol. 432, pp. 421- 435 ,(1985) , 10.1016/0375-9474(85)90252-0
Evan D. Hackett, J. A. Kuehner, J. C. Waddington, G. D. Jones, Spin of the 219Ra ground state. Physical Review C. ,vol. 40, pp. 1234- 1236 ,(1989) , 10.1103/PHYSREVC.40.1234
A M Y El-Lawindy, J D Burrows, P A Butler, J R Cresswell, V Holliday, G D Jones, R Tanner, R Wadsworth, D L Watson, K A Connell, J Simpson, C Lauterbach, J R Mines, Low-lying structure of 215Rn and 219Ra Journal of Physics G: Nuclear Physics. ,vol. 13, pp. 93- 101 ,(1987) , 10.1088/0305-4616/13/1/011