4.8 Article

Direct Observation of Proton Emission in 11Be

Journal

PHYSICAL REVIEW LETTERS
Volume 123, Issue 8, Pages -

Publisher

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.123.082501

Keywords

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Funding

  1. National Research Council Canada
  2. Natural Sciences and Engineering Research Council of Canada
  3. DOE Office of Science [DE-SC-0017649]
  4. DOE Office of Science (FRIB Theory Alliance Award) [DE-SC0013617]
  5. U.S. National Science Foundation (NSF) [PHY-1565546, PHY-1713857]
  6. U.S. Department of Energy (DOE) [DE-SC0013617] Funding Source: U.S. Department of Energy (DOE)

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The elusive beta(-) p(+) decay was observed in Be-11 by directly measuring the emitted protons and their energy distribution for the first time with the prototype Active Target Time Projection Chamber in an experiment performed at ISAC-TRIUMF. The measured beta(-) p(+) branching ratio is orders of magnitude larger than any previous theoretical model predicted. This can be explained by the presence of a narrow resonance in B-11 above the proton separation energy.

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