Table 1.

The target masses (with platinum disc) before and after the subsequent three bombardments as well as the corresponding mass losses for the irradiated discs 1 and 2

Disc	N${}^o$	Mass before production [g]	Mass after production [g]	$\mathrm{\Delta }$Mass
1	1	13.2790	13.2750	0.0040
	2	13.2750	13.2712	0.0038
	3	13.2712	13.2678	0.0034
2	1	13.0700	13.0675	0.0025
	2	13.0675	13.0642	0.0033
	3	13.0642	13.0611	0.0031