Resonance state in 7H.
The existence of the 7H nuclear system was investigated via a one-proton transfer reaction with a 8He beam at 15.4A MeV and a 12C gas target. The experimental setup was based on the active-target MAYA which allowed a complete reconstruction of the reaction kinematics. The existence of the 7H was confirmed with the identification of seven events where the system was formed with a resonance energy of 0.57(-0.21)(+0.42) MeV above the 3H+4n threshold and a resonance width of 0.09(-0.06)(+0.94) MeV. This study represents an unambiguous proof of the existence of the most neutron-proton unbalanced system presently found.
Caamaño
M
M
Department of Particle Physics, Universidade de Santiago de Compostela, E-15782, Santiago de Compostela, Spain. caamano@ganil.fr
Cortina-Gil
D
D
Mittig
W
W
Savajols
H
H
Chartier
M
M
Demonchy
C E
CE
Fernández
B
B
Gómez Hornillos
M B
MB
Gillibert
A
A
Jurado
B
B
Kiselev
O
O
Lemmon
R
R
Obertelli
A
A
Rejmund
F
F
Rejmund
M
M
Roussel-Chomaz
P
P
Wolski
R
R