EXCITATION-FUNCTIONS OF THRESHOLD REACTIONS ON SC-45 AND MN-55 INDUCED BY 6 TO 13 MEV NEUTRONS

Excitation functions were measured for the Sc-45(n,2n)Sc-44(m), Sc-45( n,2n)Sc-44(m+g), and Mn-55(n,2n)Mn-54 reactions from threshold to 13 M eV, and for the Sc-45(n,p)Ca-45, Sc-45(n,alpha)K-42, Mn-55(n,p)Cr-55, and Mn-55(n,alpha)V-52 reactions over the neutron energy range of 6 to 13 MeV. The quasimonoenergetic neutrons were produced via the H-2(d,n )He-3 reaction using a deuterium gas target at a variable energy compa ct cyclotron. The activation technique in combination with high resolu tion gamma-ray spectroscopy was used. In the case of the Sc-45(n,p)Ca- 45 and Mn-55(n,p)Cr-55 reaction products, ''low-level'' beta(-) counti ng was applied. The reaction product Ca-45 was separated radiochemical ly prior to beta(-) counting. Statistical model calculations taking in to account precompound effects were performed for all the reactions st udied. The experimental excitation functions are reproduced well by th e calculation except for the (n,alpha) reaction on the (SC)-S-45 targe t.