#define SI 0x0e
#define LC_SI 0.543105e-9 /* m */
#define M_SI (28.085*AMU) /* kg */
-#define LJ_SIGMA_SI ((0.25*sqrt(3.0)*LC_SI)/1.122462) /* m */
+#define LJ_SIGMA_SI ((0.20*sqrt(3.0)*LC_SI)/1.122462) /* m */
#define LJ_EPSILON_SI (2.1678*1.60e-19) /* Nm */
/* function prototypes */