The seniority v representation of SO(5) is the "one-rowed" irrep of SO(5) having Dynkin label (v,0). It has dimension (v+1)(v+2)(2v+3)/6. On restricting this irrep to the particular subgroup SO(3) of SO(5) defined by the Bohr model [Bo1952] (see [RW2010] for a modern overview) of the atomic nucleus, the SO(3) irrep of angular momentum L occurs with a multiplicity dv,L given by dv,L= (⌊(v-b)/3⌋+1)θv-b -⌊(v-L+2)/3⌋θv-L+2, where b=L/2 for L even, and b=(L+3)/2 for L odd, and we define θk=1 for k≥0, and θk=0 for k<0. The missing label then takes the range 1≤α≤dv,L. Lists of valid labels (v,L;α) may be found here. Expressions for the SO(5) spherical harmonics Υv,α,L,M may be found here.
Each SO(5) Clebsch-Gordon coefficient (v1,&alpha1,L1,M1; v2,&alpha2,L2,M2 | v3,&alpha3,L3,M3) may be expressed
| (v1,&alpha1,L1,M1; v2,&alpha2,L2,M2 | v3,&alpha3,L3,M3) = (v1,&alpha1,L1; v2,&alpha2,L2 || v3,&alpha3,L3) (L1,M1; L2,M2 | L3,M3), |
For various v1, v2, v3, these reduced Clebsch-Gordon coefficients are given in the files listed below, with each file dealing with fixed values of v1,v2,v3. Thus for each file, the data may be interpreted as the entries in a matrix of coefficients, the rows of which correspond to pairs of vectors with fixed seniorities v1 and v2, and the columns of which correspond to vectors with fixed seniority v3. These data files have been compiled using the algorithm developed in [RTR2004], and refined in [CRW2009]. Note that the ordering employed in the generation of these components is that in the latter of these papers (this choice arises from the multiplicity in the spaces of constant v and L).
Each "raw data" file comprises a sequence of lines containing 10 values. The first value is the reduced CG coefficient (v1,&alpha1,L1; v2,&alpha2,L2 || v3,&alpha3,L3) in scientific format. Following it are the corresponding nine integers v1,&alpha1,L1, v2,&alpha2,L2, v3,&alpha3,L3. The data in this format is readily read using Maple's "readdata" command. Only those values for which the "triangle condition" |L1-L2|≤ L3≤ L1+L2 holds are given, for all other reduced CG coefficients are zero. A zipped archive containing all the raw data files listed below is available here.
The "annotated data" file contains the same information listed without the nine integers, and with sequences of 0s compressed (the triangle condition is not used here to exclude 0s). This file is also headed by other interesting information, such as the number of reduced CG coefficients in the file and the time taken to carry out the calculation.
If you have any questions, comments or complaints, please contact David Rowe or Trevor Welsh (David will handle the complaints).
Last Updated: 04/02/2010
[Bo1952] "The coupling of nuclear surface oscillations to the motion of individual nucleons", by A. Bohr, Mat. Fys. Medd. Dan. Vid. Selsk. 26:14 (1952).
[RTR2004] "Spherical harmonics and basic coupling coefficients for the group SO(5) in an SO(3) basis", by D.J. Rowe, P.S. Turner and J. Repka, J. Math. Phys. 45 (2004) 2761-2784.
[CRW2009] "Construction of SO(5) ⊃ SO(3) spherical harmonics and Clebsch-Gordan coefficients", by M.A. Caprio, D.J. Rowe and T.A. Welsh, Comp. Phys. Comm. 180 (2009) 1150-1163. (arXiv)
[RWC2009] "The Bohr Model as an algebraic collective model", by D.J. Rowe, T.A. Welsh and M.A. Caprio, Phys. Rev. C79 (2009) 054304.
[RW2010] "Fundamentals of Nuclear Models: I Foundational Models", by D.J. Rowe and J.L Wood, to appear 2010 (World Scientific, Singapore).