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Gamma-transition strengths of T = 1 states in 10B

Author:
J. Keinonen   A. Anttila  


Journal:
Nuclear Physics A


Issue Date:
1979


Abstract(summary):

The 1.74 ( Jpi=0 1+, T =1) and 5.16 (2 2+, 1) MeV states in 10 B have been studied through the reaction 6Li(alpha,gamma) 10B. The lifetimes tau m =7plusmn3 and <6 fs, respectively, have been obtained with the DSA method. The gamma-ray decay scheme of the 5.16 MeV state has been revised and the ambiguous isoscalar E2 branch to the 1.74 MeV state has been clarified and shown to have an intensity of (0.7plusmn0.2)%. The angular distributions of gamma-rays from the 5.16 MeV state have been measured and mixing ratios determined. The M1 transition 1.74(0 +,1)rarr0.72(1 +,0) MeV is compared with the analogue beta-decay from the ground state of 10C(0 +,1) to the 0.72 MeV state and is discussed in terms of shell-model calculations. The E2 strength of the 5.16(2 +,1)rarr1.74(0 +,1) MeV isoscalar transition is compared with its analogues in the neighbouring T=1 nuclei 10B and 10C in the light of isospin selection rules


Page:
397-408


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