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

AutorJeppesen, H.; Bergmann, U. C.; García Borge, María José ; Cederkäll, J.; Fedoseyev, V. N.; Fynbo, H. O. U.; Hansper, V. Y.; Jonson, B.; Markenroth, K.; Mishin, V. I.; Nilsson, T.; Nyman, G.; Riisager, K.; Tengblad, Olof ; Wilhelmsen Rolander, K.
Palabras claveRadioactivity Be-14(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
Time distribution analysis
[PACS] Relation with nuclear matrix elements and nuclear structure
[PACS] Properties of specific nuclei listed by mass ranges: 6 ≤ A ≤ 19
[PACS] Single-particle levels and strength functions
Fecha de publicación14-ago-2002
CitaciónNuclear Physics A 709(1-4): 119–130 (2002)
ResumenIn a search for β-delayed charged particles from Be-14 we have obtained an upper limit on β-delayed α particles, B(βα) < 1.2 x 10(-4), and found evidence for β-delayed tritons at intensity of 6 x 10(-5) < B(βt) < 4 x 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 Be-14. This differs significantly from shell-model calculations at high excitation energy.
Descripción12 pages, 1 table, 6 figures.-- PACS nrs.: 23.40.Hc; 27.20.+n; 21.10.Pc.-- Printed version published Oct 21, 2002.
Versión del editorhttp://dx.doi.org/10.1016/S0375-9474(02)01093-X
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