Double-magic nature of 132Sn and 208Pb through lifetime and cross-section measurements.
Single-neutron states in (133)Sn and (209)Pb, which are analogous to single-electron states outside of closed atomic shells in alkali metals, were populated by the ((9)Be, (8)Be) one-neutron transfer reaction in inverse kinematics using particle-γ coincidence spectroscopy. In addition, the s(1/2) single-neutron hole-state candidate in (131)Sn was populated by ((9)Be, (10)Be). Doubly closed-shell (132)Sn (radioactive) and (208)Pb (stable) beams were used at sub-Coulomb barrier energies of 3 MeV per nucleon. Level energies, γ-ray transitions, absolute cross sections, spectroscopic factors, asymptotic normalization coefficients, and excited-state lifetimes are reported and compared with shell-model expectations. The results include a new transition and precise level energy for the 3p(1/2) candidate in (133)Sn, new absolute cross sections for the 1h(9/2) candidate in (133)Sn and 3s(1/2) candidate in (131)Sn, and new lifetimes for excited states in (133)Sn and (209)Pb. This is the first report on excited-state lifetimes of (133)Sn, which allow for a unique test of the nuclear shell model and (132)Sn double-shell closure.
JINPA, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
J M
JM
Allmond
Department of Nuclear Physics, Australian National University, Canberra ACT 0200, Australia.
A E
AE
Stuchbery
Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
J R
JR
Beene
Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA and Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA.
A
A
Galindo-Uribarri
Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
J F
JF
Liang
Instituto de Ciencias Nucleares, UNAM, AP 70-543, 04510 Mexico, D.F., Mexico.
E
E
Padilla-Rodal
Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
D C
DC
Radford
Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
R L
RL
Varner
Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA.
A
A
Ayres
UNIRIB, Oak Ridge Associated Universities, Oak Ridge, Tennessee 37831, USA.
J C
JC
Batchelder
Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA.
A
A
Bey
Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA and Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA.
C R
CR
Bingham
Department of Physics and Astronomy, Rutgers University, New Brunswick, New Jersey 08903, USA.
M E
ME
Howard
Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA.
K L
KL
Jones
Department of Physics and Astronomy, Rutgers University, New Brunswick, New Jersey 08903, USA.
B
B
Manning
Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
P E
PE
Mueller
Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
C D
CD
Nesaraja
Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
S D
SD
Pain
Oak Ridge Associated Universities, Oak Ridge, Tennessee 37830, USA.
W A
WA
Peters
Department of Physics and Astronomy, Rutgers University, New Brunswick, New Jersey 08903, USA.
A
A
Ratkiewicz
Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA and Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA.
K T
KT
Schmitt
Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
D
D
Shapira
Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
M S
MS
Smith
Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA and Department of Physics, Oxford University, Oxford OX1 3PU, United Kingdom.
N J
NJ
Stone
Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
D W
DW
Stracener
Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
C-H
CH
Yu