Measurement of the Gamow-Teller Branching Ratio in the β-Decay of 21Na.

Authors :: Achouri, N. L.
Angélique, J.-C.
Ban, G.
Bastin, B.
Blank, B.
Dean, S.
Dendooven, P. G.
Giovinazzo, J.
Grévy, S.
Jungmann, K.
Laurent, B.
Liénard, E.
Naviliat-Cuncic, O.
Orr, N. A.
Rogachevskiy, A.
Sohani, M.
Traykov, E.
Wilschut, H.
Source :: AIP Conference Proceedings. 1/28/2009, Vol. 1090 Issue 1, p362-366. 5p. 1 Diagram, 3 Graphs.
Publication Year :: 2009
Abstract: The β-decay branching ratio of the GT transition in 21Na to the first excited state in 21Ne has been measured. The value obtained of 4.93(20)% is in agreement with the most recent measurement and with the value adopted so far. This confirms that the branching ratio is not the source of discrepancy in a previous measurement of β-v correlation coefficient which exhibited a 3σ difference with respect to the Standard Model prediction. [ABSTRACT FROM AUTHOR]