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

Jeppesen, H.; Bergmann, U.C.; Borge, M.J.G.; Cederkäll, Joakim LU ; Fedoseyev, V.N.; Fynbo, H.O.U.; Hansper, V.Y.; Jonson, Björn; Markenroth Bloch, Karin LU and Mishin, V.I., et al. (2002) In Nuclear Physics, Section A 709(1-4). p.119-130
Abstract
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.
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publication status
published
subject
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
in
Nuclear Physics, Section A
volume
709
issue
1-4
pages
11 pages
publisher
Elsevier
external identifiers
  • scopus:0037152253
ISSN
0375-9474
DOI
10.1016/S0375-9474(02)01093-X
language
English
LU publication?
no
id
3455dab6-a068-46b7-92c7-f6b5df8d8c1a (old id 1124625)
date added to LUP
2008-05-23 09:11:09
date last changed
2017-11-14 09:55:47
@article{3455dab6-a068-46b7-92c7-f6b5df8d8c1a,
  abstract     = {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)&lt;1.2×10−4, and found evidence for β-delayed tritons at intensity of 6×10−5&lt;B(βt)&lt;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       = {Jeppesen, H. and Bergmann, U.C. and Borge, M.J.G. and Cederkäll, Joakim and Fedoseyev, V.N. and Fynbo, H.O.U. and Hansper, V.Y. and Jonson, Björn and Markenroth Bloch, Karin and Mishin, V.I. and Nilsson, T. and Nyman, G. and Riisager, K. and Tengblad, O and Wilhelmsen Rolander, K and , },
  issn         = {0375-9474},
  keyword      = {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},
  language     = {eng},
  number       = {1-4},
  pages        = {119--130},
  publisher    = {Elsevier},
  series       = {Nuclear Physics, Section A},
  title        = {Search for beta-delayed charged particles from the halo nucleus 14Be},
  url          = {http://dx.doi.org/10.1016/S0375-9474(02)01093-X},
  volume       = {709},
  year         = {2002},
}