Original scientific paper

α-particle decay of 10B and 12B observed in 9Be+7Li reactions

Neven Soić ; Ruđer Bošković Institute, Zagreb, Croatia
Silvio Cherubini ; INFN-Laboratori Nazionali del Sud and Universita di Catania, Catania, Italy
Marcello Lattuada ; INFN-Laboratori Nazionali del Sud and Universita di Catania, Catania, Italy
Đuro Miljanić ; Ruđer Bošković Institute, Zagreb, Croatia
Stefano Romano ; INFN-Laboratori Nazionali del Sud and Universita di Catania, Catania, Italy
Claudio Spitaleri ; INFN-Laboratori Nazionali del Sud and Universita di Catania, Catania, Italy
Mile Zadro ; Ruđer Bošković Institute, Zagreb, Croatia

Abstract

The 10B and 12B excitation energy spectra have been obtained from the inclusive and coincident measurements of the 9Be +7Li reactions at Ebeam=52 MeV. Contributions of the 10B states below 10 MeV and of the 12B states below 16 MeV excitation have been resolved. 10B states at 4.77 and 6.56 MeV as well as groups of states around 5.1 and 6 MeV decaying into α +6Li, and of the state at 7.0 MeV decaying into α +6Li∗ have been found. These measurements give the first evidence for α +8Li decay of the 12B states. In our data, there is no evidence for the α +8Li∗ (0.98 MeV) and α +8Li∗ (2.26 MeV) decays of 12B. The influence of α-decaying 12B states on the cross section of the astrophysically important 8Li(α,n)11B reaction is discussed.

Keywords

nuclear reactions; 9Be +7Li; Ebeam=52 MeV; 10B and 12B levels; α + 6Li; α +6Li∗and α +8Li decays

Hrčak ID:

305220

URI

https://hrcak.srce.hr/305220

Publication date:

4.5.2003.

Article data in other languages: croatian

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