Proton-induced activation cross section measurement for aluminum with proton energy range from 0.4 to 3 GeV at J-PARC

Figures & data

Figure 1. J-PARC facility layout.

Figure 2. A schematic layout of the experimental location in J-PARC. A rectangular indicated by the arrow shows the chamber position.

Figure 3. A chamber views. (a) the front view of the chamber; (b) the side view of the chamber.

Figure 4. A schematic and real view of sample holder. (a–c) Drawings; (d) A real view of the sample and the holder.

Table 1. Proton-beam parameters for irradiation

Energy (GeV)	Irradiation time (s.)	Total number of protons
0.4	75	1.77 × 10^14
1.3	75	1.72 × 10^14
2.2	75	1.78 × 10^14
3.0	95	2.20 × 10^14

Table 2. Properties of activation products

Nuclide	Half-life time	Main γ-rays energies (keV)	Absolute intensity (%)
^7Be	53.22 days	477.6	10.44
^22Na	2.6108 years	1274.5	99.9
^24Na	14.997 hours	1368.6, 2754	99.99, 99.86

Figure 5. Typical spectrum of Al 47 hours after irradiation with 2.2 GeV proton.

Table 3. Table of uncertainties

Contribution	Uncertainty (%)
HPGe spectrometer detection efficiency	3
The number of nuclide in the samples	1
Beam current	1
Total	3

Figure 6. A schematic drawing of the proton number correction (6-2) and a real image of the imaging plate (6-1).

Table 4. The activation cross sections. Only statistical uncertainty is shown

	Cross sections (mb)
Proton energy (GeV)	^7Be	^22Na	^24Na
0.4	3.55±0.46	16.24±0.99	11.45±0.83
1.3	8.95±0.82	14.93±1.07	13.94±1.06
2.2	10.14±0.85	13.49±0.97	13.16±0.96
3.0	9.66±0.80	11.96±0.89	11.51±0.87

Figure 7. The measured activation cross sections. This works (full circle) and other experiments (other symbols) taken from EXFOR  [3,10–18] data are plotted. (7-1) ²⁷Al(p, X)⁷Be (7-2) ²⁷Al(p, X)²²Na (7-3) ²⁷Al(p, X)²⁴Na.

Figure 8. (color online). Residue mass production of ²⁰⁸Pb+p reaction.

Figure 9. (color online). The measured, calculated, and evaluated activation cross sections. Same calculation results were obtained for the cross sections of ²⁷Al(p, X)²²Na and ²⁷Al(p, X)²⁴Na. (a) ²⁷Al(p, X)⁷Be (b) ²⁷Al(p, X)²²Na (c) ²⁷Al(p, X)²⁴Na.

Michel R, Bodemann R, Busemann H, et al. Cross sections for the production of residual nuclides by low- and medium-energy protons from the target elements C, N, O, Mg, Al, Si, Ca, Ti, V, Mn, Fe, Co, Ni, Cu, Sr, Y, Zr, Nb, Ba and Au. Nucl Instrum Meth B. 1997 Jul;129:153–193.

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