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

2028

50

82

8

8

20

28

50

82

126

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

2028

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126

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

50

82

8

8

20

28

50

82

126

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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126

Where do we stand now? And where to go?

Direct Mass and Half-life Measurements

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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,

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The FRS-ESR Collaboration

UniS