a-PARTICLE DECAY OF 10B AND 12BOBSERVED IN 9Be +7Li REACTIONS

Fizika B (Zagreb)

NEVEN SOI¹ 

关键词: nuclear reactions;    9Be +7Li;    Ebeam=52 MeV;    10B and 12B levels;    a +6Li;    a +6Li*and a +8Li decays;   

DOI  :  

学科分类：物理（综合）

来源: Fizika B: a journal of experimental and theoretical physics

【 摘 要 】

The ¹⁰B and ¹²B excitation energy spectra have been obtained fromthe inclusive and coincident measurements of the ⁹Be +⁷Lireactions at E_beam=52 MeV. Contributions of the ¹⁰Bstates below 10 MeV and of the ¹²B states below 16 MeV excitation have beenresolved. ¹⁰B states at 4.77 and 6.56 MeV as well as groups of states around5.1 and 6 MeV decaying into a +⁶Li, and of thestate at 7.0 MeV decaying into a +⁶Li^*have been found. These measurements give the first evidence for a +⁸Lidecay of the ¹²B states. In our data, there is no evidence for the a +⁸Li^*(0.98 MeV) and a +⁸Li^*(2.26MeV) decays of ¹²B. The influence of a-decaying ¹²Bstates on the cross section of the astrophysically important ⁸Li(a,n)¹¹B reaction is discussed.

【 授权许可】

Unknown