Observation of the ${}^7$H excited state

Abstract

The ${}^7$H system was populated in the ${}^2$H(${}^8$He,${}^3$He)${}^7$H reaction with a 26 AMeV ${}^8$He beam. The ${}^7$H missing mass energy spectrum, the ${}^3$H energy and angular distributions in the ${}^7$H decay frame were reconstructed. The ${}^7$H missing mass spectrum shows a peak which can be interpreted either as unresolved $5/2^{+}$ and $3/2^{+}$ doublet or one of these states at 6.5(5) MeV. The data also provide indications on the $1/2^{+}$ ground state of ${}^7$H located at 2.0(5) MeV with quite a low population cross section of $\sim 10$ $\mu$b/sr within angular range ${\theta }_{\text{cm}}\simeq 6^{\circ }-30^{\circ }$.

References in corpus (2)

• The ${}^8$He and ${}^{10}$He spectra studied in the $(t$,$p)$ reaction
• Pauli-principle driven correlations in four-neutron nuclear decays

Cited by in corpus (7)

• Two-proton emission and related phenomena
• Resonant states in ${}^7$H. I. Experimental studies of the ${}^2$H(${}^8$He,${}^3$He) reaction
• Measurement of ${}^6\mathrm{H}$ ground state energy in an electron scattering experiment at MAMI-A1
• The ${}^6$H states studied in the ${}^2\text{He}{(}^8\text{He}{,}^4\text{He})$ reaction and evidence of extremely correlated character of the ${}^5$H ground state
• A Vision for the Science of Rare Isotopes
• ${}^7$H ground state as a ${}^3$H+4n resonance
• Experimental investigation of ground-state properties of ${}^7$H with transfer reactions