Analog states of 7He observed via the 6He(p,n) reaction.
Isobaric analog states of 7He have been investigated by a novel technique involving the observation of the resonant yield of neutrons from the 6He(p,n) reaction in coincidence with gamma rays from the decay of the (0(+),T=1) state in 6Li. The gamma rays provide a clean signature for the isospin-conserving neutron decay of the low-lying isobaric analog resonances. It is conclusively shown that the analog of the recently observed low-lying spin-orbit partner of the 7He ground state does not exist. Evidence is presented that this state lies at much higher energies, in agreement with microscopic calculations.
Rogachev
G V
GV
Physics Department, University of Notre Dame, Notre Dame, Indiana 46556, USA. grogache@nd.edu
Boutachkov
P
P
Aprahamian
A
A
Becchetti
F D
FD
Bychowski
J P
JP
Chen
Y
Y
Chubarian
G
G
DeYoung
P A
PA
Goldberg
V Z
VZ
Kolata
J J
JJ
Lamm
L O
LO
Peaslee
G F
GF
Quinn
M
M
Skorodumov
B B
BB
Wöhr
A
A