Lifetime measurements of the neutron-rich N = 30 isotones 50Ca and 51Sc: orbital dependence of effective charges in the fp shell.
The lifetimes of the first excited states of the N = 30 isotones (50)Ca and (51)Sc have been determined using the Recoil Distance Doppler Shift method in combination with the CLARA-PRISMA spectrometers. This is the first time such a method is applied to measure lifetimes of neutron-rich nuclei populated via a multinucleon transfer reaction. This extends the lifetime knowledge beyond the f_{7/2} shell closure and allows us to derive the effective proton and neutron charges in the fp shell near the doubly magic nucleus (48)Ca, using large-scale, shell-model calculations. These results indicate an orbital dependence of the core polarization along the fp shell.
Valiente-Dobón
J J
JJ
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, Legnaro, Italy. valiente@lnl.infn.it
Mengoni
D
D
Gadea
A
A
Farnea
E
E
Lenzi
S M
SM
Lunardi
S
S
Dewald
A
A
Pissulla
Th
T
Szilner
S
S
Broda
R
R
Recchia
F
F
Algora
A
A
Angus
L
L
Bazzacco
D
D
Benzoni
G
G
Bizzeti
P G
PG
Bizzeti-Sona
A M
AM
Boutachkov
P
P
Corradi
L
L
Crespi
F
F
de Angelis
G
G
Fioretto
E
E
Görgen
A
A
Gorska
M
M
Gottardo
A
A
Grodner
E
E
Guiot
B
B
Howard
A
A
Królas
W
W
Leoni
S
S
Mason
P
P
Menegazzo
R
R
Montanari
D
D
Montagnoli
G
G
Napoli
D R
DR
Obertelli
A
A
Pawłat
T
T
Pollarolo
G
G
Rubio
B
B
Sahin
E
E
Scarlassara
F
F
Silvestri
R
R
Stefanini
A M
AM
Smith
J F
JF
Steppenbeck
D
D
Ur
C A
CA
Wady
P T
PT
Wrzesiński
J
J
Maglione
E
E
Hamamoto
I
I