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Title:
Experimental Evidence for the Existence of 7H and for a Specific Structure of 8He
Authors:
Korsheninnikov, A. A.; Nikolskii, E. Yu.; Kuzmin, E. A.; Ozawa, A.; Morimoto, K.; Tokanai, F.; Kanungo, R.; Tanihata, I.; Timofeyuk, N. K.; Golovkov, M. S.; Fomichev, A. S.; Rodin, A. M.; Chelnokov, M. L.; Ter-Akopian, G. M.; Mittig, W.; Roussel-Chomaz, P.; Savajols, H.; Pollacco, E.; Ogloblin, A. A.; Zhukov, M. V.
Affiliation:
AA(RIKEN, Hirosawa 2-1, Wako, Saitama 351-0198, Japan), AB(RIKEN, Hirosawa 2-1, Wako, Saitama 351-0198, Japan), AC(RIKEN, Hirosawa 2-1, Wako, Saitama 351-0198, Japan), AD(RIKEN, Hirosawa 2-1, Wako, Saitama 351-0198, Japan), AE(RIKEN, Hirosawa 2-1, Wako, Saitama 351-0198, Japan), AF(RIKEN, Hirosawa 2-1, Wako, Saitama 351-0198, Japan), AG(RIKEN, Hirosawa 2-1, Wako, Saitama 351-0198, Japan), AH(RIKEN, Hirosawa 2-1, Wako, Saitama 351-0198, Japan), AI(University of Surrey, Guildford, Surrey GU2 7XH, United Kingdom), AJ(JINR, 141980 Dubna, Moscow region, Russia), AK(JINR, 141980 Dubna, Moscow region, Russia), AL(JINR, 141980 Dubna, Moscow region, Russia), AM(JINR, 141980 Dubna, Moscow region, Russia), AN(JINR, 141980 Dubna, Moscow region, Russia), AO(GANIL, BP 5027, F-14076 CAEN, CEDEX 5, France), AP(GANIL, BP 5027, F-14076 CAEN, CEDEX 5, France), AQ(GANIL, BP 5027, F-14076 CAEN, CEDEX 5, France), AR(DAPNIA-SPhN, CEA Saclay, France), AS(Kurchatov Institute, Kurchatov Square 1, 123182 Moscow, Russia), AT(Chalmers University of Technology and Göteborg University, S-41296 Göteborg, Sweden)
Publication:
Physical Review Letters, vol. 90, Issue 8, id. 082501 (PhRvL Homepage)
Publication Date:
02/2003
Origin:
APS
PACS Keywords:
6<, =A<, =19, Transfer reactions
DOI:
10.1103/PhysRevLett.90.082501
Bibliographic Code:
2003PhRvL..90h2501K

Abstract

Experimental search for the superheavy
7
H isotope was performed in the reaction p(
8
He,pp)
7
H with the
8
He beam at 61.3A MeV. The evidence for existence of the
7
H state near the t+4n threshold was obtained. In the same experiment, the p(
8
He,t) reaction populating the ground and excited 2+ state of
6
He was investigated. The obtained results argue on a specific structure of the
8
He ground state containing the
6
He subsystem in the excited 2+ state with a large weight.
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