Large asymmetry in the strongest beta-transition for A=9

• A new measurement of the beta-decay of Li-9 has clarified the feeding to the highest accessible states in Be-9. It is found that the P-decay mainly populates the 11.8 MeV state, whose spin is determined as 5/2(-). The extracted B-GT value of 5.3(0.9) is a factor 4.4(1.0) larger than that of the mirror transition from C-9. A theoretical explanation of such a pronounced beta-decay asymmetry is presently lacking. (C) 2003 Elsevier B.V. All rights reserved.

Ämnesord

NATURVETENSKAP  -- Fysik -- Subatomär fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences -- Subatomic Physics (hsv//eng)

Nyckelord

measured beta-delayed E-alpha

HE-8

asymmetry

Li-9(beta(-)[from UC(p

A=9 beta-decay

alpha-coinc

alpha

LI-9

NUCLEAR

DECAY

X)])

Be-9 deduced beta-branching strengths

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