The t+n+n system and 5H.
The one-proton knockout channel from 6He (240 MeV/u) impinging on a carbon target has been investigated. The triton fragments originating from this channel were detected in coincidence with the two neutrons. A broad structure, peaked at 3 MeV above the t+2n threshold, is observed in the t+n+n-relative energy spectrum. It is shown that this structure is mainly due to a I(pi)=1/2(+) resonance as expected for the 5H ground state, and from the observed angular and energy correlations, being used for the first time in 5H studies, that the neutrons to a large extent occupy the p shell.
Meister
M
M
Fysiska Institutionen, Chalmers Tekniska Högskolaoch Göteborgs Universitet, S-412 96 Göteborg, Sweden.
Chulkov
L V
LV
Simon
H
H
Aumann
T
T
Borge
M J G
MJ
Elze
Th W
TW
Emling
H
H
Geissel
H
H
Hellström
M
M
Jonson
B
B
Kratz
J V
JV
Kulessa
R
R
Leifels
Y
Y
Markenroth
K
K
Münzenberg
G
G
Nickel
F
F
Nilsson
T
T
Nyman
G
G
Pribora
V
V
Richter
A
A
Riisager
K
K
Scheidenberger
C
C
Schrieder
G
G
Tengblad
O
O
Zhukov
M V
MV