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<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>β</mml:mi></mml:math>-Delayed Deuteron Emission from<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi>Li</mml:mi><mml:mprescripts/><mml:none/><mml:mn>11</mml:mn></mml:mmultiscripts></mml:math>: Decay of the Halo

R. RaabeInstituut voor Kern- en Stralingsfysica, K.U.Leuven, B-3001 Leuven, BelgiumA. N. AndreyevTRIUMF, Vancouver, British Columbia, Canada V6T 2A3M. J. G. BorgeInstituto de Estructura de la Materia, CSIC, Madrid, SpainL. BuchmannTRIUMF, Vancouver, British Columbia, Canada V6T 2A3P. CapelTRIUMF, Vancouver, British Columbia, Canada V6T 2A3H. O. U. FynboDepartment of Physics and Astronomy, University of Aarhus, DK-8000 Aarhus C, DenmarkM. HuyseInstituut voor Kern- en Stralingsfysica, K.U.Leuven, B-3001 Leuven, BelgiumR. KanungoTRIUMF, Vancouver, British Columbia, Canada V6T 2A3T. KirchnerTRIUMF, Vancouver, British Columbia, Canada V6T 2A3Caleb MattoonDepartment of Physics, Colorado School of Mines, Golden, Colorado 80401, USAA. C. MortonTRIUMF, Vancouver, British Columbia, Canada V6T 2A3I. MukhaInstituut voor Kern- en Stralingsfysica, K.U.Leuven, B-3001 Leuven, BelgiumJ. PearsonTRIUMF, Vancouver, British Columbia, Canada V6T 2A3J. PonsaersInstituut voor Kern- en Stralingsfysica, K.U.Leuven, B-3001 Leuven, BelgiumJ. J. ResslerDepartment of Chemistry, Simon Fraser University, Burnaby, B.C. Canada V5A-1S6K. RiisagerDepartment of Physics and Astronomy, University of Aarhus, DK-8000 Aarhus C, DenmarkCamilo RuízDepartment of Physics, Simon Fraser University, Burnaby, B.C. Canada V5A-1S6G. RuprechtTRIUMF, Vancouver, British Columbia, Canada V6T 2A3F. SarazinDepartment of Physics, Colorado School of Mines, Golden, Colorado 80401, USAO. TengbladInstituto de Estructura de la Materia, CSIC, Madrid, SpainP. Van DuppenInstituut voor Kern- en Stralingsfysica, K.U.Leuven, B-3001 Leuven, BelgiumP. WaldenTRIUMF, Vancouver, British Columbia, Canada V6T 2A3

2008lv

ABI

Annotatsiya

The deuteron-emission channel in the $\ensuremath{\beta}$ decay of the halo nucleus $^{11}\mathrm{Li}$ was measured at the Isotope Separator and Accelerator facility at TRIUMF by implanting postaccelerated $^{11}\mathrm{Li}$ ions into a segmented silicon detector. The events of interest were identified by correlating the decays of $^{11}\mathrm{Li}$ with those of the daughter nuclei. This method allowed the energy spectrum of the emitted deuterons to be extracted, free from contributions from other channels, and a precise value for the branching ratio ${B}_{d}=1.30(13)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}4}$ to be deduced for ${E}_{\mathrm{c}.\mathrm{m}.}>200\text{ }\text{ }\mathrm{keV}$. The results provide the first unambiguous experimental evidence that the decay takes place essentially in the halo of $^{11}\mathrm{Li}$ and that it proceeds mainly to the $^{9}\mathrm{Li}+d$ continuum, opening up a new means to study the halo wave function of $^{11}\mathrm{Li}$.

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Identifikatorlar

DOI: 10.1103/physrevlett.101.212501

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