Alpha:2n:alpha molecular band in 10Be.
The 10.15 MeV resonance in 10Be has been probed via resonant 6He+4He elastic scattering. It is demonstrated that it is the Jpi=4+ member of a rotational band built on the 6.18 MeV 0+ state. A Gammaalpha of 0.10-0.13 MeV and Gammaalpha/Gamma=0.35-0.46 were deduced. The corresponding reduced alpha width, gamma2alpha, indicates one of the largest alpha-cluster spectroscopic factors known. The deformation of the band, including the 7.54 MeV, 2+ member, is large (h2/2I=200 keV). Such a deformation and the significant degree of clusterization signals a well-developed alpha:2n:alpha molecular structure.
Freer
M
M
School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham, B15 2TT, United Kingdom.
Casarejos
E
E
Achouri
L
L
Angulo
C
C
Ashwood
N I
NI
Curtis
N
N
Demaret
P
P
Harlin
C
C
Laurent
B
B
Milin
M
M
Orr
N A
NA
Price
D
D
Raabe
R
R
Soić
N
N
Ziman
V A
VA