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-

Ämneskategorier

Subatomär fysik

Fundament

Grundläggande vetenskaper

DOI

10.1103/PhysRevLett.111.242501

Mer information

Skapat

2017-10-07