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Resonance states of hydrogen nuclei 4H and 5H obtained in transfer reactions with exotic beams

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Abstract

To investigate 5H resonance states with a better instrumental resolution, we utilized the two-neutron transfer reaction 3H(t, p)5H accomplished with the use of a cryogenic liquid-tritium target and 57.5-MeV triton beam. As a result of this study, a valuable fraction of protons detected at ϑ lab=18°–32° in ptn coincidence events was attributed to the states of the 5H nucleus. Two resonance states situated at 1.8±0.1 and 2.7±0.1 MeV above the t + n + n decay threshold were obtained in the missing mass energy spectrum of the 5H nucleus. The peak located close to E5H was clearly seen in the 5H spectrum obtained from the energy distributions of 3H nuclei emitted in the reaction 2H(6He, 5H)3He at ϑ lab=17°–32°. The width (Γobs≤0.5 MeV) obtained for the two 5H resonance states is surprisingly small. A state of 4H with E res=3.3 MeV and γ 2=2.3 MeV was obtained in the reaction 2H(t, p)4H from the spectra of protons leaving the target at ϑ lab=18°–32° and detected in coincidence with neutrons emitted in the decay of 4H nuclei.

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From Yadernaya Fizika, Vol. 66, No. 8, 2003, pp. 1587–1594.

Original English Text Copyright © 2003 by Ter-Akopian, Bogdanov, Fomichev, Golovkov, Oganessian, Rodin, Sidorchuk, Slepnev, Stepantsov, Wolski, Gorshkov, Chelnokov, Korsheninnikov, Nikolski, Tanihata, Hanappe, Materna, Stuttge, Ninane.

This article was submitted by the authors in English.

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Ter-Akopian, G.M., Bogdanov, D.D., Fomichev, A.S. et al. Resonance states of hydrogen nuclei 4H and 5H obtained in transfer reactions with exotic beams. Phys. Atom. Nuclei 66, 1544–1551 (2003). https://doi.org/10.1134/1.1601763

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