INTERACTION OF SLOW-NEUTRONS WITH NUCLIDES OF SCANDIUM, TITANIUM, VANADIUM AND MANGANESE

Total cross section measurements at various neutron energies were perf ormed on metallic and oxide samples of natural Sc, Ti, V, and Mn. By m eans of the Christiansen filter technique the coherent scattering leng ths were determined on natural and isotopically enriched samples of Ti -, V-, and Mn-compounds. From the measured values we deduced the follo wing data: the absorption cross sections (at 0.0253 eV in barn) of (na t)Ti (6.43 +/- 0.06) and of (nat)V (5.06 +/- 0.04); the bound coherent scattering lengths (in fm) of (nat)Ti (-3.370 +/- 0.013), Ti-46 (4.72 +/- 0.05), Ti-47 (3.5 3 +/- 0.07), Ti-48 (-5.86 +/- 0.02), Ti-49 (0.9 8 +/- 0.05), (-0.443 +/- 0.014), and Mn (-3.750 +/- 0.018); the free p otential radii (in fm) of Sc (3.60 +/- 0.10), Ti-46 (3.50 +/- 0.10), T i-47 (3.60 +/- 0.10), Ti-48 (3.90 +/- 0.10), Ti-49 (4.10 +/- 0.15), Ti -50 (4.50 +/- 0.15), V-51 (5.20 +/- 0.20), and Mn (6.50 +/- 20). On th e basis of the well known resonance parameters in combination with new fits of bound levels the spin state scattering lengths, the spin inco herence, and the obtained potential radii are discussed. Total cross s ection calculations were performed by multi-level formalism and are co mpared with the measurements.