Delayed particles from the beta decay of /sup 11/Be

Journal Article · Wed Dec 31 23:00:00 EST 1980 · Phys. Rev., C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.23.473· OSTI ID:6745308

Alburger, D E; Millener, D J; Wilkinson, D H

Heavy particles emitted in the ..beta.. decay of /sup 11/Be were studied by forming the activity in the /sup 9/Be(t,p)/sup 11/Be reaction at E/sub t/=3.4 MeV and measuring the radiations by means of a helium-jet system together with Si and NaI(Tl) detectors. ..cap alpha.. particles and corresponding /sup 7/Li recoil ions were observed both in singles and in coincidence with 478-keV ..gamma.. rays. It is deduced that /sup 11/Be branches 2.9 +- 0.4 % by ..beta..-ray emission to the 9875-keV J/sup ..pi../=3/2/sup +/ excited state of /sup 11/B, which then decays by ..cap alpha.. emission 87.4 +- 1.2 % to the ground state of /sup 7/Li and 12.6 +- 1.2 % to the 478-keV excited state. The experimental logft of 4.04 +- 0.08 for the /sup 11/Be ..beta.. branch to the 9875-keV state agrees with a theoretical estimate of approx. =4.0, and the ambiguity in an earlier result is thereby resolved. The ..cap alpha.. branching intensity to the /sup 7/Li 478-keV state is in reasonable agreement with a theoretical estimate.

• Research Organization: Brookhaven National Laboratory, Upton, New York 11973
• OSTI ID: 6745308
• Journal Information: Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 23:1; ISSN PRVCA
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALI METAL ISOTOPES
ALKALINE EARTH ISOTOPES
ALPHA PARTICLES
BERYLLIUM 11
BERYLLIUM 9
BERYLLIUM ISOTOPES
BETA DECAY
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY
BETA-MINUS DECAY RADIOISOTOPES
BORON 11
BORON ISOTOPES
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
COINCIDENCE SPECTROMETRY
DECAY
DELAYED ALPHA PARTICLES
DIRECT REACTIONS
ENERGY LEVELS
ENERGY RANGE
EVEN-ODD NUCLEI
FT VALUE
GAMMA SPECTRA
ISOTOPES
LIGHT NUCLEI
LITHIUM 7
LITHIUM ISOTOPES
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 01-10
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
ODD-EVEN NUCLEI
PROTON SPECTRA
RADIOISOTOPES
RECOILS
SECONDS LIVING RADIOISOTOPES
SHELL MODELS
SPECTRA
STABLE ISOTOPES
STRIPPING
TRANSFER REACTIONS
TRITON REACTIONS