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Nilsson states nuclei

Strutinsky developed an extension of the liquid drop model which satisfactorily explains the fission isomers and asymmetric fission. For such short half-lives the barrier must be only 2-3 MeV. Noting the manner in which the shell model levels vary with deformation ( 11.5, the "Nilsson levels"), Strutinsky added shell corrections to the basic liquid-drop model and obtained the "double-well" potential energy curve in Figure 14.14b. In the first well the nucleus is a spheroid with the major axis about 25 % larger than the minor. In the second well, the deformation is much larger, the axis ratio being about 1.8. A nucleus in the second well is metastable (i.e. in isomeric state) as it is unstable to y-decay to the first well or to fission. Fission from the second well is hindered by a 2 - 3 MeV barrier, while from the first well the barrier is 5 - 6 MeV, accounting for the difference in half-lives. [Pg.386]


See other pages where Nilsson states nuclei is mentioned: [Pg.171]    [Pg.173]    [Pg.331]    [Pg.111]    [Pg.776]    [Pg.233]    [Pg.161]    [Pg.163]    [Pg.324]    [Pg.191]    [Pg.21]    [Pg.375]    [Pg.95]    [Pg.43]   
See also in sourсe #XX -- [ Pg.165 , Pg.166 , Pg.167 , Pg.168 , Pg.169 ]




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Nilsson

Nilsson states

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