The isovector quadrupole-quadrupole interaction used in shell model calculations
نویسندگان
چکیده
منابع مشابه
The Isovector Quadrupole-Quadrupole Interaction Used in Shell Model Calculations
An interaction −χQ ·Q(1+B~τ(1) · ~τ(2)) is used in a shell model calculation for 10Be. Whereas for B = 0 the 21 state is two-fold degenerate, introducing a negative B causes an ‘isovector’ 2+ state to come down to zero energy at B = −0.67 and an S = 1 L = 1 triplet (J = 0+, 1+, 2+) to come down to zero energy at B = −0.73. These are undesirable properties, but a large negative B is apparently n...
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The effect of the " B " term in the interaction −χQ · Q(1 + B τ (1) · τ (2)), which was previously considered in the 0p shell, is now studied in a larger space which includes ∆N = 2 excitations. We still get a collapse of low-lying states below the conventional J = 0 + ground state when B is made sufficiently negative.
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We carry out a study of the study of the Q · Q interaction in a model space which consists of several nucleons in an open shell and all 2¯ hω excitations. Xo 2 Q · Q, where for t=1 we get the 'accepted strength'. In the 0p space, the spectrum would scale with t. In this space, the 2 + 1 and 2 + 2 states of 10 Be are degenerate, as are the [330] and [411] sets of J = 0 + , 1 + and 2 + triplets. ...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 1995
ISSN: 0370-2693
DOI: 10.1016/0370-2693(95)00899-v