Isotopic production cross sections in proton-nucleus collisions at 200 MeV

Intermediate-mass fragments from the interaction of ${}^{27}\mathrm{Al}$, ${}^{59}\mathrm{Co}$, and ${}^{197}\mathrm{Au}$ with 200-MeV protons were measured in an angular range from ${20}^{°}$ to ${120}^{°}$ in the laboratory system. The fragments, ranging from isotopes of helium up to isotopes of carbon, were isotopically resolved. Double-differential cross sections, energy-differential cross sections, and total cross sections were extracted.

Figure 1

Mass distributions from the interaction of 200-MeV protons with ${}^{59}\mathrm{Co}$ measured at 20${}^{°}$.

Figure 2

Energy spectra of α particles for the given angles and the given targets.

Figure 3

Same as Fig. 2, but for ${}^6\mathrm{He}$ emission.

Figure 4

Same as Fig. 2, but for ${}^6\mathrm{Li}$ emission.

Figure 5

Same as Fig. 2, but for ${}^7\mathrm{Li}$ emission.

Figure 6

Same as Fig. 2, but for ${}^8\mathrm{Li}$ emission.

Figure 7

Same as Fig. 2, but for ${}^7\mathrm{Be}$ emission.

Figure 8

Same as Fig. 2, but for ${}^9\mathrm{Be}$ emission.

Figure 9

Same as Fig. 2, but for ${}^{10}\mathrm{B}$ emission.

Figure 10

The slope parameter as a function of the Coulomb corrected energy.

Figure 11

Fit with one source to the low-energy data. The laboratory emission angle is given next to the appropriate data set or fit curve, respectively. The data and the fits were multiplied with the indicated factors.

Figure 12

Double-differential cross sections for $A=7$ emission following the bombardment of ${}^{27}\mathrm{Al}$ with protons. The data from Ref. 27 are shown as histograms and are for 180 MeV; the present data are shown as dots with error bars. The emission angles are given in the legend in which the first angle is for the present data, the second for those from Ref. 27.

Figure 13

Cross sections for total IMF production. The present data are shown by solid symbols, those from Ref. 19 by open dots, and those from Ref. 18 by open squares.

Figure 14

Angular distributions of Li and Be fragments for the indicated targets (this work) and for a silver target at 161-MeV proton energy [19].

Figure 15

Comparison of double-differential cross sections from the $p+$${}^{59}\mathrm{Co}$$\to$${}^6\mathrm{Li}$$+X$ reaction (this work, dots with error bars) and $p+\mathrm{Ag}\to$${}^6\mathrm{Li}$$+X$ reaction (Ref. 18, histograms). The first angle given is for the present data while the second is for those from Ref. 18.

Figure 16

Similar as Fig. 15, but for the indicated reactions and data from Ref. 14, normalized by a factor of 4.

Figure 17

(Color online) Energy-differential cross sections for indicated IMFs for aluminum. The data are shown by the different symbols indicated in the figure. The histograms are calculations described in the text.

Figure 18

(Color online) Same as Fig. 17, but for cobalt.

Figure 19

(Color online) Same as Fig. 17, but for gold.