Search for beta-delayed charged particles from the halo nucleus 14Be

Summary, in English

In a search for β-delayed charged particles from 14Be we have obtained an upper limit on β-delayed greek small letter alpha particles, B(βgreek small letter alpha)<1.2×10−4, and found evidence for β-delayed tritons at intensity of 6×10−5<B(βt)<4×10−4 (both at 95% confidence level). By adding information on the β-delayed neutron branches from direct measurements at low neutron energy and indirect detection via recoiling nuclei at high energy, and by including also information from earlier experiments, we deduce the β strength distribution from 14Be. This differs significantly from shell-model calculations at high excitation energy.

• Author: H. Jeppesen; U.C. Bergmann; M.J.G. Borge; Joakim Cederkäll; V.N. Fedoseyev; H.O.U. Fynbo; V.Y. Hansper; Björn Jonson; Karin Markenroth Bloch; V.I. Mishin; T. Nilsson; G. Nyman; K. Riisager; O Tengblad; K Wilhelmsen Rolander
• Publishing year: 2002
• Language: English
• Pages: 119-130
• Publication/Series: Nuclear Physics, Section A
• Volume: 709
• Issue: 1-4
• Links: http://dx.doi.org/10.1016/S0375-9474(02)01093-X
• Document type: Journal article
• Publisher: Elsevier
• Topic: Subatomic Physics
• Keywords: Time distribution analysis; 14Be(β−); (β−n) [from Ta(p; X)]; measured; β-delayed charged particle spectra; branching ratios; β-delayed neutron spectra; Mass separated source; Si-gas telescope
• Status: Published
• ISBN/ISSN/Other: ISSN: 0375-9474