First direct measurement of the total cross section of 12C(alpha,gamma)16O

Schuermann, D.; Di Leva, A.; Gialanella, L.; Rogalla, D.; Strieder, F.; De Cesare, N.; D'Onofrio, A.; Imbriani, G.; Kunz, R.; Lubritto, C.; Ordine, A.; Roca, V.; Rolfs, C.; Romano, M.; Schuemann, F.; Terrasi, F.; Trautvetter, H. -P.

First direct measurement of the total cross section of 12C(alpha,gamma)16O

Authors

Description

The total cross section of 12C(alpha,gamma)16O was measured for the first time by a direct and ungated detection of the 16O recoils. This measurement in inverse kinematics using the recoil mass separator ERNA in combination with a windowless He gas target allowed to collect data with high precision in the energy range E=1.9 to 4.9 MeV. The data represent new information for the determination of the astrophysical S(E) factor.
5 pages, 3 figures, 1 table, accepted for publication Eur.Phys.J. A (Online first available)