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Título

New information on β-delayed neutron emission from Be-12, Be-14

AutorBergmann, U. C.; Axelsson, L.; García Borge, María José ; Fedoseyev, V. N.; Forssén, C.; Fynbo, H. O. U.; Grévy, S.; Hornshøj, P.; Jading, Y.; Jonson, B.; Köster, U.; Markenroth, K.; Marqués, F. M.; Mishin, V. I.; Nilsson, T.; Oberstedt, A.; Ravn, H. L.; Riisager, K.; Schrieder, G.; Sebastian, V.; Simon, H.; Tengblad, Olof ; Wenander, F.; Wilhelmsen Rolander, K.
Palabras claveRadioactivity: Be-12, Be-14 (from 1 GeV p on UC target, selective mass separation)
Measured βn, nn time correlations
Be-12, Be-14 deduced P(n) values, Be-14 deduced P(xn) values
Neutron long counters
[PACS] Properties of specific nuclei listed by mass ranges: 6 ≤ A ≤ 19
[PACS] Relation with nuclear matrix elements and nuclear structure
Fecha de publicación18-oct-1999
EditorElsevier
CitaciónNuclear Physics A 658(2): 129-145 (1999)
ResumenThe β-delayed neutron branches from neutron-rich Be-isotopes have been measured with a setup sensitive down to thermal energies. For Be-14 a new value of P(n) = 101 ± 4% has been found for the total neutron-emission probability and an upper limit of 2.4% (95% confidence level) is imposed on the combination P(2n) + 3P(3n) of multi-neutron emission probabilities. Moreover, an improved value of P(n) = 0.50 ± 0.03% has been obtained for Be-12. A time-correlation method, previously developed for a continuous radioactive beam to determine neutron branching ratios, has been revised and adapted to the pulsed secondary beam at ISOLDE, CERN.
Descripción17 pages, 3 tables, 5 figures, 1 appendix.-- PACS nrs.: 23.40.Hc; 27.20.+n.
Versión del editorhttp://dx.doi.org/10.1016/S0375-9474(99)00348-6
URIhttp://hdl.handle.net/10261/10048
DOI10.1016/S0375-9474(99)00348-6
ISSN0375-9474
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