Study of the Be14 continuum: Identification and structure of its second 2+ state
Artikel i vetenskaplig tidskrift, 2013
The coupling between bound quantum states and those in the continuum is of high theoretical interest. Experimental studies of bound drip-line nuclei provide ideal testing grounds for such investigations since they, due to the feeble binding energy of their valence particles, are easy to excite into the continuum. In this Letter, continuum states in the heaviest particle-stable Be isotope, Be14, are studied by employing the method of inelastic proton scattering in inverse kinematics. New continuum states are found at excitation energies E*=3.54(16) MeV and E*=5.25(19) MeV. The structure of the earlier known 21+ state at 1.54(13) MeV was confirmed with a predominantly (0d5/2)2 configuration while there is very clear evidence that the 22+ state has a predominant (1s1/2, 0d 5/2) structure with a preferential three-body decay mechanism. The region at about 7 MeV excitation shows distinct features of sequential neutron decay via intermediate states in Be13. This demonstrates that the increasing availability of energetic beams of exotic nuclei opens up new vistas for experiments leading towards a new understanding of the interplay between bound and continuum states. © 2013 American Physical Society.
Författare
Y. Aksyutina
T. Aumann
K. Boretzky
M. J. G. Borge
C. Caesar
A. Chatillon
L.V. Chulkov
D. Cortina-Gil
U. Datta Pramanik
H. Emling
H. O. U. Fynbo
H. Geissel
Andreas Martin Heinz
Chalmers, Teknisk fysik, Subatomär fysik
G. Ickert
Håkan T Johansson
Chalmers, Teknisk fysik, Subatomär fysik
Björn Jonson
Chalmers, Teknisk fysik, Subatomär fysik
R. Kulessa
C.E. Langer
T. LeBleis
K. Mahata
G. Münzenberg
Thomas Nilsson
Chalmers, Teknisk fysik, Subatomär fysik
G. Nyman
R. Palit
S. Paschalis
W. Prokopowicz
R. Reifarth
D. Rossi
A.W. Richter
K. Riisager
G. Schrieder
H. Simon
K. Sümmerer
O. Tengblad
Ronja Thies
Chalmers, Teknisk fysik, Subatomär fysik
H. Weick
Mikhail Zhukov
Chalmers, Teknisk fysik, Subatomär fysik
Physical Review Letters
0031-9007 (ISSN) 1079-7114 (eISSN)
Vol. 111 24 article nr. 242501- 242501Ämneskategorier
Subatomär fysik
Fundament
Grundläggande vetenskaper
DOI
10.1103/PhysRevLett.111.242501