Download - Mass and Half-Life Measurements of Stored Exotic Nuclei Yu.A. Litvinov, Hirschegg 19.01.2006
Mass and Half-Life Measurements
of Stored Exotic Nuclei
Yu.A. Litvinov, Hirschegg 19.01.2006
nuclides w ith know n m assesG .Audi e t a l., N ucl. Phys. A729 (2003) 3
stable nucle i
observed nucle i
nuclides w ith know n m assesG .Audi e t a l., N ucl. Phys. A595 (1995) 409
r-processpath
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nuclides w ith know n m assesG .Audi et a l., N ucl. Phys. A729 (2003) 3
stable nucle i
m easured at FR S-ESR (published)
observed nucle i
r-processpath
m easured at FR S-ESR (in analysis)
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Present Knowledge of Atomic Masses
Highly-Charged IonsIn-Flight Separation
Cocktail or Monoisotopic Beams
SIS
FRS
ESRSchottky P ick-U ps
from
UN
ILA
C Target
Electron cooler
TO F detector
Experimental facility at GSI
Electron cooler
G as-target
Q uadrupole-trip let
Septum -m agnet
D ipole m agnet
Fast kickerm agnet
RF-Acceleratingcavity
Hexapole-m agnets
From the FR S
Extraction
To the S IS
Q uadrupole-dublet
Schottky p ick-ups
Schottky Mass Spectrometry (SMS)
0v
v
SchottkyP ick-ups
Stored ion beam
f ~ 2 M H z0
FFT
am plificationsum m ation
0 1 0 . 0 2 0 . 0 3 0 . 0 4 0 . 0 5 0 . 0 6 0 . 0 7 0 . 0 8 0 . 00
5
1 0
8 0 . 0 9 0 . 0 1 0 0 . 0 1 1 0 . 0 1 2 0 . 0 1 3 0 . 0 1 4 0 . 0 1 5 0 . 0 1 6 0 . 0
1 6 0 . 0 1 7 0 . 0 1 8 0 . 0 1 9 0 . 0 2 0 0 . 0 2 1 0 . 0 2 2 0 . 0 2 3 0 . 0 2 4 0 . 0
240.0 250.0 260.0 270.0 280.0 290.0 300.0 310.0 320.0
know n m asses A q+X unknow n m asses
N um ber of channels 216
R ecord ing tim e 30 sec
188 78+Pt
0
5
10
0
5
10
0
5
10
Frequency / kH z
Inte
nsity
/ ar
b. u
nits
201 84+
194 81+Tl
182 76+Pt182 76+
182 76+
189 79+
Ir
O s
Po
Hg
189 79+Au
177 74+W
196 82+Bi
196 82+Pb
184 77+Pt
184 77+Ir198 83+Bi
191 80+Tl
191 80+Hg
194 81+Au
200 83+Bi
183 76+Ir
183 76+O s
195 81+Tl195 81+PbPb
188 78+ 178 74+Re
190 79+Au
197 82+Bi
197 82+Pb
185 77+Ir
185 77+Pt192 80+Tl
192 80+Hg
199 83+Bi187 78+Pt
187 78+Au
Pb
190 79+Hg
IrAu 181 75+
198 82+Pb
193 80+Tl
193 80+Hg
194 80+Tl194 80+
189 78+
Tl191 79+Hg
187 77+
199 82+ Pb
Hg
196 81+
204 84+
Pt
Pb
Pt Ir186 77+
Po
187 77+Au
BiPbPb
182 75+Ir
194 80+Hg 189 78+Au189 78+
201 83+Po
201 83+Bi184 76+
184 76+O s
191 79+Au
203 84+Po
186 77+Pt
186 77+Ir181 75+R e198 82+Bi
193 80+Pb199 82+
O s181 75+
200 82+Bi
195 80+Tl
197 81+Pb
197 81+Bi 192 79+Hg
192 79+Au
198 81+Bi
198 81+Pb193 79+Tl
193 79+Hg
188 77+Au 205 84+Po
200 82+Pb200 82+Po195 80+Pb
190 78+Hg
190 78+Au
185 76+Pt
202 83+Po
202 83+Bi 197 81+Tl198 81+Pb
188 77+Pt
A q+X
15
0m,g
65+
Dy
150
65+
Tb
143
62+
143m
,g
62+
Eu S
m
157
6
8+E
r12
7
5
5+C
s
157
68+
Tm
173
75+
166
72+
166
72+
180
78+
Pt
Re
Hf
Ta
152
66+
152
66+
Ho
Dy
159
69
+
159
69
+
136
59
+
Tm
Yb
Pr
W
164
71+
171
74
Lu
164
71+
Hf
145
63+
122
53+
Gd
I
175
76+
161
70+
138
60+16
1
7
0+
168
73+
168
7
3+
Os
TaW
Yb
Nd
Lu
149
65+
Tb
156
6
8+
156
68+
Er
Tm
154
67+
154
67+
HoEr
163
71+
147
64+
147
64+
147
64+
Dy
Tb
Gd
Lu
165
72+
165
72+
172
75+16
3
71+
170
74+
Hf
TaRe
W
Hf
10000 20000 30000 40000 50000 60000 70000 80000 90000 100000
8
7
6
5
4
3
2
1
0
Frequency / H z
Inte
nsi
ty /
arb.
uni
ts
m ass know n m ass unknow n
Broad-band Schottky frequency spectra
N eutron N um ber
Pro
ton
Num
ber
82
2850
82
126
50
mass surfacemeasured
with the SMS
nuclides with known
masses
Measured Mass Surface
About 1/3 of all known masseswere covered in one experiment
Typical mass accuracy 1.5 10-7
Mass resolving power 2 106 reached
275 new masses determinedMore than 300 improved values
Yu.A. Litvinov et al., Nucl. Phys. A756 (2005) 3
Predictive Powers of Mass Models
200
400
600
800
1000
1200
Sat
path
y-N
ayak
Tach
iban
a et
al.
Spa
nier
-Joh
anss
on
Mas
son-
Jäne
cke
Möl
ler
et a
l. (F
RLD
M)
Gor
iely
et a
l. (H
F-B
CS
, MS
k7)
M ass m odel
rm
s/ k
eV
Gor
iely
et a
l. (E
TF
SI-
2)
Möl
ler
et a
l. (F
RD
M)
Duf
lo-Z
ucke
r (2
8 pa
r.)
Mye
rs-S
wia
teck
i
Gor
iely
et a
l. (H
FB
, BS
k1)
Two new SMS experiments
92.0 92 05. 92 1. 92 15. 92 2. 92 25. 92 3. 92 35. 92 4.
Time [s]
Frequency H z[k ]
0
60
Noi
se p
ower
den
sity
235 Ac 88+
120
180
Identification, Mass and Half-life valuesin one experiment
Isohronous Mass Spectrometry (IMS)
t
Valve
Test position
M easuringposition M agnets
Tim e-of-flight detector system
1m
C irculating beam
Time-of-Flight Spectra
m/q range is 2.4-2.7
0
100
200
300
400
500
600
700
506 506.2 506.4 506.6 506.8 507
106 41+Mo
106 41+Nb
unknow n m ass
119 46+Ag
119 46+Pd
88 34+Se
132 51+Sb
101 39+Y
114 44+Rh
114 44+Ru
127 49+In
know n m ass
127 49+Sn
83 32+Ge
96 37+Rb133
52 Te 51+
13351 Sb 51+
133m51 Sb 51+
E * = 4.5 M eV
Isochronicity curvesfor several mass-to-charge ratios
Improved resolving power
238U Fission Fragments
M. Matos, PhD Thesis, JLU Giessen 2004
Predictive Powers of Mass Models
200
400
600
800
1000
1200
Sat
path
y-N
aya
k
Tach
iban
a et
al.
Mas
son-
Jäne
cke
Möl
ler
et a
l. (F
RLD
M)
Gor
iely
et a
l. (H
F-B
CS
, MS
k7)
M ass m odel
rm
s/ k
eV
Gor
iely
et
al.
(ET
FS
I-2)
Möl
ler
et a
l. (F
RD
M)
Duf
lo-Z
ucke
r (2
8 p
.)
Mye
rs-S
wia
teck
i
Gor
iely
et a
l. (H
FB
, BS
k2)
H. Geissel, Yu.A. Litvinov et al, Nucl. Phys. A746 (2004) 150c
Predictive Powers of Mass Models
UNILACSIS
FRS
ESR
HESRSuperFRS
NESR
CR
RESR
SIS 300
SIS 100
GSI today
PANDA
El.Cooler
Atom.Phys.
CBM
Plasma Phys.
FLAIR
Low En. Expt.
High En. Expt.
NESR Expts
Antiproton Production Target
SIS18 Upgrade
Beamlines
The FAIR Project
PAX/ASSIA
v
v
qm
qm
f
f
t
t
tt
1/
)/(2
22
t Δv v
→ 0
Isomeric beams, LIfetimes, and MAsses
nuclides w ith know n m assesG .Audi e t a l., N ucl. Phys. A729 (2003) 3
stable nucle i
to be m easured w ith existing FR S-ESRG SI report C . Scheidenberger e t a l., 2002observed nucle i
r-processpath
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nuclides w ith know n m assesG .Audi et a l., N ucl. Phys. A729 (2003) 3
stable nucle i
m easured at FR S-ESR (published)
observed nucle i
r-processpath
m easured at FR S-ESR (in analysis)
2028
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nuclides w ith know n m assesG .Audi e t a l., N ucl. Phys. A729 (2003) 3
stable nucle i
to be m easured w ith SU PER -FR S-C R -R ESR -N ESRC onceptual D esign R eport, G S I 2001observed nucle i
r-processpath
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Where do we stand now? And where to go?
Direct Mass and Half-life Measurements
F. Attallah, G. Audi, K. Beckert, P. Beller, F. Bosch, D. Boutin, T. Buervenich, R.S. Chakrawarthy, L. Chen, D. Cullen, T. Faestermann, M. Falch,
B. Franczak, B. Franzke, H.-Geissel, M. Hausmann, M. Hellström, G. Jones, E. Kaza, Th. Kerscher, P. Kienle, O. Klepper, H.-J. Kluge, C. Kozhuharov, K.-L. Kratz, R. Knöbel, K.E.G. Löbner, S.A. Litvinov, Yu.A. Litvinov, Z. Liu,
M. Matoš, L. Maier, G. Münzenberg, F. Nolden, Yu.N. Novikov, T. Ohtsubo, A. Ostrowski, A. Ozawa, Z. Patyk, B. Pfeiffer, W.R. Plass,
Z. Podolyak, M. Portillo, T. Radon, H. Schatz, C. Scheidenberger, M. Shindo, V. Shishkin, J. Stadlmann, M. Steck, K. Sümmerer, T. Suzuki,
M.B. Trzhakovskaya, S. Typel, D.J. Vieira, G. Vorobjev, P.M. Walker, H. Weick, S. Williams, M. Winkler, H. Wollnik, T. Yamaguchi, and
The FRS-ESR Collaboration
UniS