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Experimental evidence for the existence of 7H and for a specific structure of 8He
A A Korsheninnikov1, E Yu Nikolskii, E A Kuzmin
1RIKEN, Hirosawa 2-1, Wako, Saitama 351-0198, Japan.
Physical Review Letters
|March 14, 2003
Abstract:
Experimental search for the superheavy 7H isotope was performed in the reaction p(8He,pp)7H with the 8He beam at 61.3A MeV. The evidence for existence of the 7H state near the t+4n threshold was obtained. In the same experiment, the p(8He,t) reaction populating the ground and excited 2(+) state of 6He was investigated. The obtained results argue on a specific structure of the 8He ground state containing the 6He subsystem in the excited 2(+) state with a large weight.