Search for superheavy hydrogen isotopes 6H and 7H in stopped π-absorption reactions

Yu. B. Gurov; B. A. Chernyshev; S. V. Isakov; V. S. Karpukhin; S. V. Lapushkin; I. V. Laukhin; V. A. Pechkurov; N. O. Poroshin; V. G. Sandukovsky

doi:10.1140/epja/i2007-10388-3

EPJ

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2023 Impact factor 2.6

Hadrons and Nuclei

Eur. Phys. J. A (2007) 32: 261-266
https://doi.org/10.1140/epja/i2007-10388-3

Regular Article - Nuclear Structure and Reactions

Search for superheavy hydrogen isotopes ⁶H and ⁷H in stopped π-absorption reactions

Yu. B. Gurov¹, B. A. Chernyshev¹, S. V. Isakov¹, V. S. Karpukhin¹, S. V. Lapushkin¹, I. V. Laukhin¹, V. A. Pechkurov¹, N. O. Poroshin¹ and V. G. Sandukovsky²

¹ Moscow Engineering Physics Institute (State University), 115409, Moscow, Russia
² Joint Institute for Nuclear Research, 141980, Dubna, Russia

Received: 29 January 2007
Accepted: 22 May 2007
Published online: 12 June 2007

Abstract

Experimental search for superheavy hydrogen isotopes ⁶H and ⁷H was performed in the stopped pion absorption on ⁹Be and ¹¹B nuclei. The structures in the missing-mass spectra were observed in the reaction channels ⁹Be(π^-, pd )X and ¹¹B(π^-, p⁴He)X . Four states of ⁶H were proposed. Evidences for ⁷H formation were obtained in the reaction channels ⁹Be(π^-, pp)X and ¹¹B(π^-, p³He)X .