Investigation of Proton Beam-Driven Fusion Reactions Generated by an Ultra-Short Petawatt-Scale Laser Pulse

Table 2

Activation results for the pitcher-catcher shots after 30-shot integration.

Isotope	^11C	^13N	^18F
Half-life (min)	20.4	9.94	109.8
Decay constant (min^−1)	0.034	0.0697	0.0063
Relative contribution (%)	93.435	6.531	0.034
Activity A at t = 0 (Bq)	9143	639	3.3
Number of nuclei N2	1.6 × 10^7	5.5 × 10^5	3.2 × 10^4
N2 per shot per J	37,000	1300	75

Each column lists physical and fit parameters for the three discussed nuclei. N₂ is the calculated number of nuclei based on the measured activity A. The last row is the same number, normalized per shot per 1 J of energy.