Neutron Production in Thick Targets Irradiated with High-Energy Ions

Table 3

𝐵(¹⁴⁰La)-values on the “Gamma-2” Pb target, irradiated with protons at the Nuclotron [9] and compared with different model calculations.

Proton energy + Target	Experiment: 𝐵(^140La) 10^−5[g^−1∗proton^−1]	Calculation: neutrons/proton (𝑛/𝑝)
		MCNPX 2.7a	LAHET [8]	DCM [8]
1.0 GeV + Pb	4.69±0.32	15.0	15.3	17.4
2.0 GeV + Pb	8.86±0.62	26.4	—	—
3.7 GeV + Pb	11.35±0.80	43.0	38.7	43.9
Ratio 2.0 GeV/1.0 GeV	1.89±0.19	1.76	—	—
Ratio 3.7 GeV/1.0 GeV	2.5±0.2	2.87	2.52	2.52