Roots of BESSJ0:

                  x           F(x)

 Root  1      2.404826     -0.4961E-07
 Root  2      5.520078      0.4911E-07
 Root  3      8.653728      0.6095E-07
 Root  4     11.791534     -0.7776E-07
 Root  5     14.930918      0.5961E-07
 Root  6     18.071064     -0.5490E-07
 Root  7     21.211637     -0.9485E-07
 Root  8     24.352472      0.7356E-07
 Root  9     27.493479      0.1030E-06
 Root 10     30.634607      0.7590E-07
 Root 11     33.775818      0.1037E-06
 Root 12     36.917095     -0.2078E-06
 Root 13     40.058426     -0.2176E-06
 Root 14     43.199791      0.1006E-06
 Root 15     46.341187      0.3058E-07
 Root 16     49.482609      0.5500E-07