The y activity from 11Li beta decay

C. Détraz (1) , D. Guillemaud (1) , M. Langevin (1) , F. Naulin (1) , M. Epherre (2) , R. Klapisch (2) , M. de Saint-Simon (2) , C. Thibault (2) , F. Touchard (2)

1 IPNO - Institut de Physique Nucléaire d'Orsay
2 CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse

The energies and absolute intensities of the γ-rays from the β-decay of 11Li are measured. There is no sizable β branch to the 11Be ground state. Only (5.2 ± 1.4) % of the β-decay strength does not lead to β-delayed particle emission. New β-delayed neutron branches to excited states of 10Be are observed and the total delayed neutron emission probability is deduced.

Mots clés: beta decay; delayed neutrons; gamma ray spectra; nuclear branching and mixing ratios; nuclei with mass number 6 to 19; gamma activity; sup 11 Li beta decay; beta branch; sup 11 Be ground state; beta delayed neutron branches; excited states; sup 10 Be; total delayed neutron emission probability

Domaines: Articles anciens; Physique Nucléaire Expérimentale [nucl-ex]

C. Détraz, D. Guillemaud, M. Langevin, F. Naulin, M. Epherre, et al.. The y activity from 11Li beta decay. Journal de Physique Lettres, 1980, 41 (19), pp.459-461. ⟨10.1051/jphyslet:019800041019045900⟩. ⟨jpa-00231821⟩