Open AccessQuadrupole Transition Strength in theNi 74
Author(s) -
T. Marchi,
G. de Angelis,
J. J. Valiente-Dobón,
V. M. Bader,
T. Baugher,
D. Bazin,
J. S. Berryman,
A. Bonaccorso,
R. M. Clark,
L. Coraggio,
H. L. Crawford,
M. Doncel,
E. Farnea,
A. Gade,
A. Gadea,
A. Gargano,
T. Glasmacher,
A. Gottardo,
F. Gramegna,
N. Itaco,
P. R. John,
Ravinder Kumar,
S. M. Lenzi,
S. Lunardi,
S. McDaniel,
C. Michelagnoli,
D. Mengoni,
V. Modamio,
D. R. Napoli,
B. Quintana,
A. Ratkiewicz,
F. Recchia,
E. Şahin,
R. Stroberg,
D. Weißhaar,
K. Wimmer,
R. Winkler
Publication year - 2014
Publication title -
physical review letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.688
H-Index - 673
eISSN - 1079-7114
pISSN - 0031-9007
DOI - 10.1103/physrevlett.113.182501
Subject(s) - physics , computer science
The reduced transition probability B(E2;0(+) -> 2(+)) has been measured for the neutron-rich nucleus Ni-74 in an intermediate energy Coulomb excitation experiment performed at the National Superconducting Cyclotron Laboratory at Michigan State University. The obtained B(E2;0(+) -> 2(+)) = 642(-226)(+216) e(2) fm(4) value defines a trend which is unexpectedly small if referred to Ni-70 and to a previous indirect determination of the transition strength in Ni-74. This indicates a reduced polarization of the Z = 28 core by the valence neutrons. Calculations in the pfgd model space reproduce well the experimental result indicating that the B(E2) strength predominantly corresponds to neutron excitations. The ratio of the neutron and proton multipole matrix elements supports such an interpretation