Spectroscopy of element 115 decay chains.
A high-resolution α, x-ray, and γ-ray coincidence spectroscopy experiment was conducted at the GSI Helmholtzzentrum für Schwerionenforschung. Thirty correlated α-decay chains were detected following the fusion-evaporation reaction 48Ca + 243Am. The observations are consistent with previous assignments of similar decay chains to originate from element Z=115. For the first time, precise spectroscopy allows the derivation of excitation schemes of isotopes along the decay chains starting with elements Z>112. Comprehensive Monte Carlo simulations accompany the data analysis. Nuclear structure models provide a first level interpretation.
Lund University, 22100 Lund, Sweden.
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D
Rudolph
U
U
Forsberg
P
P
Golubev
L G
LG
Sarmiento
A
A
Yakushev
L-L
LL
Andersson
A
A
Di Nitto
Ch E
ChE
Düllmann
J M
JM
Gates
K E
KE
Gregorich
C J
CJ
Gross
F P
FP
Heßberger
R-D
RD
Herzberg
J
J
Khuyagbaatar
J V
JV
Kratz
K
K
Rykaczewski
M
M
Schädel
S
S
Åberg
D
D
Ackermann
M
M
Block
H
H
Brand
B G
BG
Carlsson
D
D
Cox
X
X
Derkx
K
K
Eberhardt
J
J
Even
C
C
Fahlander
J
J
Gerl
E
E
Jäger
B
B
Kindler
J
J
Krier
I
I
Kojouharov
N
N
Kurz
B
B
Lommel
A
A
Mistry
C
C
Mokry
H
H
Nitsche
J P
JP
Omtvedt
P
P
Papadakis
I
I
Ragnarsson
J
J
Runke
H
H
Schaffner
B
B
Schausten
P
P
Thörle-Pospiech
T
T
Torres
T
T
Traut
N
N
Trautmann
A
A
Türler
A
A
Ward
D E
DE
Ward
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N
Wiehl