Author:
Kern Ralph,Zidarova Radostina,Pietralla Norbert,Rainovski Georgi,Gaffney Liam P.,Blazhev Andrey,Boukhari Amar,Cederkäll Joakim,Cubiss James G.,Djongolov Martin,Fransen Christoph,Gladnishki Kalin,Giannopoulos Efstathios,Hess Herbert,Jolie Jan,Karayonchev Vasil,Kaya Levent,Keatings James M.,Kocheva Diana,Kröll Thorsten,Möller Oliver,O’Neill George G.,Pakarinen Janne,Reiter Peter,Rosiak Dawid,Scheck Marcus,Snall Jacob,Söderström Pär-Anders,Spagnoletti Pietro,Stegmann Robert,Stoyanova Milena,Thiel Stefan,Vogt Andreas,Warr Nigel,Welker Andree,Werner Volker,Wiederhold Johannes,Witte Hilde De
Abstract
Abstract
A projectile Coulomb-excitation experiment was performed at the radioactive ion beam facility HIE-ISOLDE at CERN. The radioactive 140Nd and 142Sm ions were post accelerated to the energy of 4.62 MeV/A and impinged on a 1.45 mg/cm2-thin 208Pb target. The γ rays depopulating the Coulomb-excited states were recorded by the HPGe-array MINIBALL. The scattered charged particles were detected by a double-sided silicon strip detector in forward direction. Experimental γ-ray intensities were used for the determination of electromagnetic transition matrix elements. Preliminary results for the reduced transition strength of the
B
(
M
1
;
2
3
+
→
2
1
+
)
=
0.35
(
19
)
μ
N
2
of 140Nd and a first estimation for 142Sm have been deduced using the Coulomb-excitation calculation software GOSIA. The
2
3
+
states of 140Nd and 142Sm show indications of being the main fragment of the proton-neutron mixed-symmetry
2
1
,
ms
+
state.
Subject
General Physics and Astronomy