Resonant states in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi mathvariant="normal">H</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>7</mml:mn></mml:mrow></mml:mmultiscripts></mml:math> : Experimental studies of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi mathvariant="normal">H</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:mmultiscripts><mml:mo>(</mml:mo><mml:…

The extremely neutron-rich system $^{7}$H was studied in the direct $^2$H($^8$He,$^3$He)$^7$H transfer reaction with a 26 AMeV secondary $^{8}$He beam [Bezbakh et al., Phys. Rev. Lett. 124 (2020) 022502]. missing mass spectrum and center-of-mass (c.m.) angular distributions of $^{7}$H, as well momentum distribution $^{3}$H fragment frame, were constructed. In addition to investigation reported Ref. 022502], we carried out another experiment same but modified setup, which cross-checked by study $^2$H($^{10}$Be,$^3$He$)^{9}$Li reaction. A solid experimental evidence is provided that two resonant states are located its at 2.2(5) 5.5(3) MeV relative $^3$H+4$n$ decay threshold. Also, there indications 7.5(3) 11.0(3) present measured spectrum. Based on energy distributions, obtained for reaction, weakly populated peak ascribed $^7$H ground state. It highly plausible firmly ascertained state $5/2^+$ member excitation $5/2^+$-$3/2^+$ doublet, built $2^+$ configuration valence neutrons. supposed 7.5 can be this could not resolved Consequently, doublet members appeared 022502] single broad 6.5 peak.