Asymmetry in the super-allowed β-transitions of the A=9 isobars

M.J.G. Borge; Y. Prezado; R. Boutami; L.M. Fraile; I. Martel; O. Tengblad; U.C. Bergmann; Christian Aaen Diget; H.O.U. Fynbo; H. Jeppesen; K. Riisager; J. Cederkäll; Y. Jading; T. Nilsson; H. Simon; L. Weissman; B. Jonson; M. Meister; G. Nyman; F. Wenander; K. Wilhelmsen

doi:10.1016/j.nuclphysa.2004.04.074

Asymmetry in the super-allowed β-transitions of the A=9 isobars

M.J.G. Borge, Y. Prezado, R. Boutami, L.M. Fraile, I. Martel, O. Tengblad, U.C. Bergmann, Christian Aaen Diget, H.O.U. Fynbo, H. Jeppesen, K. Riisager, J. Cederkäll, Y. Jading, T. Nilsson, H. Simon, L. Weissman, B. Jonson, M. Meister, G. Nyman, F. WenanderK. Wilhelmsen

Physics

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Abstract

We report here on the recent β-decay studies of the A = 9 isobar made at ISOLDE/CERN. Mirror beta transitions in the A=9 chain are compared and a large asymmetry factor is deduced for the transitions to high excitation energy in Be (11.8 MeV) arid B (12.2 MeV) fed in the β-decay of Li and C respectively. It is shown that the asymmetry is not due to experimental problems or differences in the mechanisms of breakup or in the spin of the states. Only differences in the partial decay branches of the breakup channels have been found. As no asymmetry is found in the gs to gs transition it must be due to the particular structure of these excited states.

Original language	English
Pages (from-to)	206-210
Number of pages	5
Journal	Nuclear Physics A
Volume	738
Issue number	1-4 SUPPL.
DOIs	https://doi.org/10.1016/j.nuclphysa.2004.04.074
Publication status	Published - 28 Jun 2004

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Borge, M. J. G., Prezado, Y., Boutami, R., Fraile, L. M., Martel, I., Tengblad, O., Bergmann, U. C., Diget, C. A., Fynbo, H. O. U., Jeppesen, H., Riisager, K., Cederkäll, J., Jading, Y., Nilsson, T., Simon, H., Weissman, L., Jonson, B., Meister, M., Nyman, G., ... Wilhelmsen, K. (2004). Asymmetry in the super-allowed β-transitions of the A=9 isobars. Nuclear Physics A, 738(1-4 SUPPL.), 206-210. https://doi.org/10.1016/j.nuclphysa.2004.04.074

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title = "Asymmetry in the super-allowed β-transitions of the A=9 isobars",

abstract = "We report here on the recent β-decay studies of the A = 9 isobar made at ISOLDE/CERN. Mirror beta transitions in the A=9 chain are compared and a large asymmetry factor is deduced for the transitions to high excitation energy in Be (11.8 MeV) arid B (12.2 MeV) fed in the β-decay of Li and C respectively. It is shown that the asymmetry is not due to experimental problems or differences in the mechanisms of breakup or in the spin of the states. Only differences in the partial decay branches of the breakup channels have been found. As no asymmetry is found in the gs to gs transition it must be due to the particular structure of these excited states.",

author = "M.J.G. Borge and Y. Prezado and R. Boutami and L.M. Fraile and I. Martel and O. Tengblad and U.C. Bergmann and Diget, {Christian Aaen} and H.O.U. Fynbo and H. Jeppesen and K. Riisager and J. Cederk{\"a}ll and Y. Jading and T. Nilsson and H. Simon and L. Weissman and B. Jonson and M. Meister and G. Nyman and F. Wenander and K. Wilhelmsen",

year = "2004",

month = jun,

day = "28",

doi = "10.1016/j.nuclphysa.2004.04.074",

language = "English",

volume = "738",

pages = "206--210",

journal = "Nuclear Physics A",

issn = "0375-9474",

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Borge, MJG, Prezado, Y, Boutami, R, Fraile, LM, Martel, I, Tengblad, O, Bergmann, UC, Diget, CA, Fynbo, HOU, Jeppesen, H, Riisager, K, Cederkäll, J, Jading, Y, Nilsson, T, Simon, H, Weissman, L, Jonson, B, Meister, M, Nyman, G, Wenander, F & Wilhelmsen, K 2004, 'Asymmetry in the super-allowed β-transitions of the A=9 isobars', Nuclear Physics A, vol. 738, no. 1-4 SUPPL., pp. 206-210. https://doi.org/10.1016/j.nuclphysa.2004.04.074

TY - JOUR

T1 - Asymmetry in the super-allowed β-transitions of the A=9 isobars

AU - Borge, M.J.G.

AU - Prezado, Y.

AU - Boutami, R.

AU - Fraile, L.M.

AU - Martel, I.

AU - Tengblad, O.

AU - Bergmann, U.C.

AU - Diget, Christian Aaen

AU - Fynbo, H.O.U.

AU - Jeppesen, H.

AU - Riisager, K.

AU - Cederkäll, J.

AU - Jading, Y.

AU - Nilsson, T.

AU - Simon, H.

AU - Weissman, L.

AU - Jonson, B.

AU - Meister, M.

AU - Nyman, G.

AU - Wenander, F.

AU - Wilhelmsen, K.

PY - 2004/6/28

Y1 - 2004/6/28

N2 - We report here on the recent β-decay studies of the A = 9 isobar made at ISOLDE/CERN. Mirror beta transitions in the A=9 chain are compared and a large asymmetry factor is deduced for the transitions to high excitation energy in Be (11.8 MeV) arid B (12.2 MeV) fed in the β-decay of Li and C respectively. It is shown that the asymmetry is not due to experimental problems or differences in the mechanisms of breakup or in the spin of the states. Only differences in the partial decay branches of the breakup channels have been found. As no asymmetry is found in the gs to gs transition it must be due to the particular structure of these excited states.

AB - We report here on the recent β-decay studies of the A = 9 isobar made at ISOLDE/CERN. Mirror beta transitions in the A=9 chain are compared and a large asymmetry factor is deduced for the transitions to high excitation energy in Be (11.8 MeV) arid B (12.2 MeV) fed in the β-decay of Li and C respectively. It is shown that the asymmetry is not due to experimental problems or differences in the mechanisms of breakup or in the spin of the states. Only differences in the partial decay branches of the breakup channels have been found. As no asymmetry is found in the gs to gs transition it must be due to the particular structure of these excited states.

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U2 - 10.1016/j.nuclphysa.2004.04.074

DO - 10.1016/j.nuclphysa.2004.04.074

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SN - 0375-9474

VL - 738

SP - 206

EP - 210

JO - Nuclear Physics A

JF - Nuclear Physics A

IS - 1-4 SUPPL.

ER -

Asymmetry in the super-allowed β-transitions of the A=9 isobars

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