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Workshop on The Future of Superheavy Element Research February 17 - 18, 2004 Gesellschaft f ü r Schwerionenforschung Darmstadt, Germany. One End of Nuclear Chart. 116. 176. 115. 209 Bi + 70 Zn →. 114. 209 Bi + 64 Ni → 272 111 + n. 113. 208 Pb + 64 Ni → 271 Ds + n. 112. 111. Ds.

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Workshop on The Future of Superheavy Element Research February 17 - 18, 2004

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Workshop on the future of superheavy element research february 17 18 2004

Workshop on

The FutureofSuperheavy Element Research

February 17 - 18, 2004

Gesellschaft für SchwerionenforschungDarmstadt, Germany


Workshop on the future of superheavy element research february 17 18 2004

One End of Nuclear Chart

116

176

115

209Bi + 70Zn →

114

209Bi + 64Ni → 272111 + n

113

208Pb + 64Ni → 271Ds + n

112

111

Ds

Mt

170

Hs

Bh

Sg

Db

Rf

162

Lr

No

Md

a

Fm

SF

Es

b+ or EC

Cf

b-

152


Workshop on the future of superheavy element research february 17 18 2004

CSM Dec. Tank

CSMAcc. Tanks

RILAC Acc. Tanks

RFQ-Linac

GARIS

18GHz ECR Ion Source

RILAC Facility


Workshop on the future of superheavy element research february 17 18 2004

Gas-filled recoil separator (気体充填型反跳分離装置)

差動排気システム

Heガスの領域

入射ビーム

入射ビームの軌道

Heガス導入

ビームストッパー(Ta)

マイラフォイル

回転式標的

弾性散乱による

ビーム強度モニター

半導体検出器

 (真空領域)

D1 Q1 Q2 D2

目的とするイオンの軌道

(m)

0

1

2

RIKEN


Workshop on the future of superheavy element research february 17 18 2004

PSD

SSD box

MCP2

ions

MCP1

Focal Plane Detectors


Workshop on the future of superheavy element research february 17 18 2004

New Rotating Target f = 300 mm, w = 2000 rpm

cf. old one f = 125 mm, w = 1000 rpm

Tested with 1pmA 86Kr beam


Workshop on the future of superheavy element research february 17 18 2004

20

208Pb

18

209Bi

Bohr’s theorem

16

169Tm

14

198At

271110

208Pb

12

272111

qeq

265Hs

209Bi

212Ac

10

192Bi

203Fr

8

208Pb

204Fr

234Bk

254No

6

255Lr

245Fm

209Bi

4

30

5

25

20

15

10

v0: Bohr velocity

(v/v0)Z1/3


Workshop on the future of superheavy element research february 17 18 2004

projectile target recoil compound nucleus

energy separator velocity separator gas-filled separator


Workshop on the future of superheavy element research february 17 18 2004

271110

272110

a1

208Pb + 64Ni → 271Ds + n

267Hs

a2

263Sg

a3

259Rf

a4

255No

a5

255Md

251Fm


Workshop on the future of superheavy element research february 17 18 2004

5

5

5

5

5

0

0

0

0

0

a

b

t=2.9ms

t=120ms

5

a1

a1

0

11

5

1000s

1ms

0.1s

10s

8

9

t=77ms

a2

a2

0

5

1000s

1ms

0.1s

10s

8

9

10

11

Counts/bin

t=1.0s

a3

a3

Counts/100keV

0

5

1000s

1ms

0.1s

10s

8

9

10

11

t=3.7s

a4

a4

0

5

1000s

1ms

0.1s

10s

8

9

10

11

t=220s

a5

a5

0

1000s

10ms

1ms

0.1s

10s

7

8

9

10

11

Ea (MeV)

Tdecay


Workshop on the future of superheavy element research february 17 18 2004

Summary of 208Pb + 64Ni → 271110 + n reaction


Workshop on the future of superheavy element research february 17 18 2004

272111

273111

a1 (14)

209Bi + 64Ni → 272111 + n

268Mt

a2 (14)

264Bh

a3 (12)

SF (2)

260Db

a4 (11)

SF (1)

256Lr

a5

256No

a5

252Md


Workshop on the future of superheavy element research february 17 18 2004

272111

273111

a1 (14)

209Bi + 64Ni → 272111 + n

268Mt

a2 (14)

264Bh

a3 (12)

264Sg

260Db

a4 (11)

260Rf

SF (2)

256Lr

a5

SF (1)

256No

a5

252Md

possibility not excluded experimentally


Workshop on the future of superheavy element research february 17 18 2004

5

5

0

0

5

5

0

0

Counts / 100 keV

5

5

Counts / bin

0

0

5

5

0

0

E

/ MeV

α

254Md ← 256Lr ← 260Db ← 264Bh ← 268Mt ← 272111

t=5.5ms

a1

a1

a2

a2

t=30ms

a3

t=1.3s

a3

a4

a4

t=8.2s

5

5

a5

a5

t=26s

0

0

8

9

10

11

12

100ms

10ms

1s

100s

10000s

Tdecay


Workshop on the future of superheavy element research february 17 18 2004

Summary of 209Bi + 64Ni → 272111 + n reaction


Workshop on the future of superheavy element research february 17 18 2004

Summary of 209Bi + 70Zn experiment

period9/5/2003 ~ 12/29/2003

Beam Energy5.03 AMeV

348 MeV at target half depth

Total Dose1.21x1019

Target Thickness1.37x1018 /cm2(0.48 mg/cm2)

e_GARIS0.8(assumption)

s(1-ev.)7.5x10-38 cm2

upper limit (1s)1.38x10-37 cm2

Irradiation time1390 Hours(58 Days / 74 Days)

Beam Intensity2.42x1012 /s(0.4 p-mA)


Workshop on the future of superheavy element research february 17 18 2004

208Pb,209Bi(HI,1n) reaction

1mb

100nb

10nb

1nb

100pb

10pb

1pb

present work

0.1pb

102

104

106

108

110

112

114

100

Atomic Number


Workshop on the future of superheavy element research february 17 18 2004

K. MorimotoRIKEN

D. KajiCNS

H. HabaRIKEN

E. IdeguchiRIKEN

R. KanumgoRIKEN

K. KatoriRIKEN

H. KouraRIKEN

T. OhnishiRIKEN

A. OzawaRIKEN

T. SudaRIKEN

I. TanihataRIKEN

A. YonedaRIKEN

A. YoshidaRIKEN

H. KudoNiigata U.

K. SuekiUniv. of Tsukuba

F. Tokanai Yamagata U.

H. XuIMP Lanzhou

Y.-L. ZhaoIHEP Beijing

T. ZengPeking U.

A. V. YereminFLNR JINR

J. PeterCaen/GANIL


Workshop on the future of superheavy element research february 17 18 2004

February 17, 2004

FEST COLLOQUIUM: On the Occasion of Sigurd Hofmann’s 60th Birthday

What Do We Know about SHE - Expectations and RealityYuri Oganessian

February 18, 2004

Chair:Gottfried Münzenberg

Welcome Walter Henning

Theory of Superheavy Nuclei: Old and New - Open ProblemsWalter Greiner

Chemistry of Spherical Superheavy Elements - The Road to SuccessHeinz Gäggeler

Superheavy Element Research at Berkeley Ken Gregorich

Possibilities of the RF Nuclear Center Arzamas-16´

in Producing Pure Actinide Isotopes for Science and Applications Stanislav Vesnovskii

In Beam Studies of SHE at High Beam Intensities Matti Leino

Superheavy-Element Experiments at RIKEN Kosuke Morita

Studies of SHE at GANILChristelle Stodel

Heavy Element Research at IMP LanzhouWenlong Zhan

Heavy Element Research with Laser Spectroscopy and Buffer Gas Traps Hartmut Backe

Efficient Production of Intensive Beams of Rare Isotopes Georgy Gulbekian

Steps towards an Optimized Linac for SHE Production at GSI Ulrich Ratzinger

Studies of SHE at High Beam Intensities Sigurd Hofmann

Closing Remarks Walter Henning


Workshop on the future of superheavy element research february 17 18 2004

GSI SHIP


Workshop on the future of superheavy element research february 17 18 2004

JINR/FLNR DUBNA

Gas-Filled Separator


Workshop on the future of superheavy element research february 17 18 2004

JINR/FLNR DUBNA


Workshop on the future of superheavy element research february 17 18 2004

LBNL BGS


Workshop on the future of superheavy element research february 17 18 2004

GANIL LISE (Wien Filter)


Workshop on the future of superheavy element research february 17 18 2004

Z=110に対する計算値


Workshop on the future of superheavy element research february 17 18 2004

2004年1月9日於京都大学理学部物理学第二教室

qeq

(v/v0)Z1/3


Workshop on the future of superheavy element research february 17 18 2004

169Tm(40Ar,5n)204Fr

169Tm(40Ar,6n)203Fr

169Tm(48Ca,5n)212Ac

208Pb(40Ar,3n)245Fm

208Pb(48Ca,2n)254No

209Bi(48Ca,2n)255Lr

140Ce(58Fe,p5n)192Bi

140Ce(64Ni,p5n)198At

208Pb(58Fe,n)265Hs

208Pb(64Ni,n)271110

209Bi(64Ni,n)272111

113

112

111

110

Mt

Hs

Bh

Sg

Db

Rf

Lr

No

Md

Fm

Es

Cf

Bk

Cm

Am

Pu

Np

U

Pa

Th

Ac

Ra

Fr

Rn

At

Po

Bi

Pb


Workshop on the future of superheavy element research february 17 18 2004

Transmission

v/v0


Workshop on the future of superheavy element research february 17 18 2004

Experimental conditions

Beam64Ni0.4~1 pmA

Total dose4.0 x 1018

Target208Pb190~250 mg/cm2 (98% enriched)

evaporated on 30 mg/cm2 C

covered by 10 mg/cm2 C

Br (GARIS)2.05 Tm

P (GARIS)75Pa

Counting rate10~20cps


Workshop on the future of superheavy element research february 17 18 2004

2004年1月9日於京都大学理学部物理学第二教室

Summary of the measurement in year 2002.

208Pb(64Ni,n)271110 reaction

Total 40 4.0 14

Ein :energy from the accelerator. Tav: average target thickness


Workshop on the future of superheavy element research february 17 18 2004

103

102

10

1

10-1

Tdecay (s)

a1

a2

10-2

a3

10-3

a4

a5

10-4

10-5

8

7

9

10

11

Ea (MeV)


Workshop on the future of superheavy element research february 17 18 2004

208Pb + 64Ni → 271110 + n

errors

statistical (1s)

RIKEN

GSI

s (pb)

energy loss

in the target

E(64Ni) /MeV


Workshop on the future of superheavy element research february 17 18 2004

Experimental conditions

Beam64Ni0.7~1.8 pmA

Total dose1.30 x 1019

Target209Bi210~310 mg/cm2

evaporated on 30 mg/cm2 C

covered by 10 mg/cm2 C

Br (GARIS)2.05 Tm

P (GARIS)75Pa

Counting rate2~10cps


Workshop on the future of superheavy element research february 17 18 2004

Summary of the measurement in year 2003.

209Bi(64Ni,n)272111 reaction

Total 50 12.6 14

Ein :energy from the accelerator. Tav: average target thickness


Workshop on the future of superheavy element research february 17 18 2004

a

a

a

a

a

a

a

a

a

a

a

a

a

a

a

17-Feb-2003

17-Feb-2003

CN

CN

272111

272111

4.4 ms

11.04 MeV (PSD)

11.0 ms

11.08 MeV (PSD+SSD)

268Mt

268Mt

CN

272111

13.0 ms

10.68 MeV (PSD)

9.2 ms

10.36 MeV (PSD)

14.9 ms

11.56 MeV (PSD+SSD)

264Bh

264Bh

268Mt

1.45 s

9.60 MeV (PSD)

1.38 s

9.81 MeV (PSD+SSD)

122 ms

1.12 MeV (PSD) escape

260Db

260Db

264Bh

1.93 s

9.17 MeV (PSD+SSD)

10.88 s

9.05 MeV (PSD)

21.8 ms

9.85 MeV (PSD)

256Lr

256Lr

260Db

21.9 s

8.37 MeV (PSD)

11.9 s

8.39 MeV (PSD+SSD)

0.51 s

9.34 MeV (PSD)

252Md

252Md

256Lr

33.5 s

8.65 MeV (PSD)

20-Feb-2003

252Md

209Bi(64Ni,n)272111

Eproj=323MeV

1st

2nd

3rd


Workshop on the future of superheavy element research february 17 18 2004

a

a

a

a

a

a

a

a

a

a

a

26-Feb-2003

CN

272111

1.42 ms

11.25 MeV (PSD)

209Bi(64Ni,n)272111

Eproj=323MeV

268Mt

36.6 ms

10.43 MeV (PSD+SSD)

26-Feb-2003

CN

272111

264Bh

4th

7.11 ms

10.82 MeV (PSD+SSD)

1.87 s

9.66 MeV (PSD+SSD)

268Mt

260Db

0.715 ms

10.28 MeV (PSD)

1.52 s

9.40 MeV (PSD)

CN

272111

264Bh

256Lr

2.82 ms

11.31 MeV (LG)

0.54 s

9.57 MeV (PSD)

268Mt

260Db

44 ms

10.78 MeV (PSD+SSD)

S.F.

264Bh

1.71 s

231 MeV (PSD+SSD)

0.44 s

9.58 MeV (PSD)

260Db

5th

48.46 s

8.81 MeV (PSD)

6th

256Lr

8-Apr-2003


Workshop on the future of superheavy element research february 17 18 2004

a

a

a

a

a

a

a

a

a

a

a

a

14-Apr-2003

CN

272111

1.17 ms

10.58 MeV (LG)

268Mt

CN

272111

38.33 ms

10.35 MeV (PSD)

5.11 ms

11.06 MeV (PSD)

264Bh

268Mt

3.6 ms

9.31 MeV (PSD)

19.1 ms

10.43 MeV (PSD)

260Db

264Bh

4.87 s

9.01 MeV (PSD)

1.34 s

9.50 MeV (PSD)

256Lr

260Db

45.84 s

8.50 MeV (PSD)

3.69 s

9.10 MeV (PSD)

252Md

256Lr

7.87 s

8.41 MeV (PSD)

16-Apr-2003

252Md

209Bi(64Ni,n)272111

Eproj=323MeV

15-Apr-2003

CN

272111

7th

8.89 ms

10.96 MeV (PSD+SSD)

268Mt

26.18 ms

2.76 MeV (PSD)esc

264Bh

S.F.

0.97 s

208 MeV (PSD)

8th

9th


Workshop on the future of superheavy element research february 17 18 2004

CN

272111

1.0 ms

10.21 MeV (PSD)

268Mt

a

a

a

a

a

a

a

a

a

a

a

8.8 ms

10.03 MeV (PSD+SSD)

264Bh

S.F.

4.93 s

206 MeV (PSD+SSD)

CN

272111

6.92 ms

11.00 MeV (PSD+SSD)

268Mt

35.5 ms

10.58 MeV (PSD)

264Bh

1.0 s

9.85 MeV (PSD)

260Db

1.14 s

9.14 MeV (PSD)

256Lr

38.62 s

8.47 MeV (PSD+SSD)

5-May-2003

252Md

30-Apr-2003

209Bi(64Ni,n)272111

Eproj=320MeV

5-May-2003

CN

272111

0.77 ms

10.85 MeV (PSD+SSD)

268Mt

32.4 ms

10.34 MeV (PSD)

264Bh

1.91 s

8.87 MeV (PSD+SSD)

10th

260Db

21.04 s

8.503 MeV (PSD)

256Lr

11th

12th


Workshop on the future of superheavy element research february 17 18 2004

a

a

a

a

a

a

a

a

a

CN

272111

6.84 ms

11.01 MeV (PSD+SSD)

12-May-2003

CN

272111

268Mt

4.5 ms

11.08 MeV (PSD+SSD)

37.2 ms

9.40 MeV (PSD)

268Mt

264Bh

3.35 ms

10.28 MeV (PSD)

1.23 s

9.56 MeV (PSD+SSD)

264Bh

260Db

0.81 s

9.63 MeV (PSD)

0.33 s

8.29MeV (PSD+SSD)

260Db

256Lr

2.42s

9.131 MeV (PSD+SSD)

256Lr

6.85 s

8.63 MeV (PSD)

252Md

8-May-2003

209Bi(64Ni,n)272111

Eproj=323MeV

13th

14th


Workshop on the future of superheavy element research february 17 18 2004

254Md ← 256Lr ← 260Db ← 264Bh ← 268Mt ← 272111

102

a1

10

a2

a3

1

a4

a5

Tdecay (s)

10-1

10-2

10-3

10-4

9.0

10.0

12.0

8.0

11.0

Ea (MeV)


Workshop on the future of superheavy element research february 17 18 2004

Optimum excitation energies for 1n evaporation channel


Workshop on the future of superheavy element research february 17 18 2004

RARF_PAC 02Jul2003

140Ce + 64Ni evaporation residues

209Bi + 64Ni transfer products

to GARIS

64Ni

199At 6.643 MeV p4n evap.

400

196Po 6.520 MeV a4n evap.

209Bi

Nat.Ce

212mAt 7.837,7.897 MeV 2pn transfer

300

211Po 7.450 MeV pn transfer

213Rn 8.088 MeV 3pn transfer

197Po 6.281 MeV a3n evap.

212At 7.679 MeV 2pn transfer

213Fr 6.775 MeV 4p transfer

200

Counts/10keV

197mPo 6.383 MeV

214mFr 8.546, 8.478 MeV 4pn transfer

211mPo 7.275 MeV pn transfer

214Fr 8.426 MeV 4pn transfer

198Po 6.182 MeV

200Po 5.862 MeV

100

199Po 6.058 MeV

system check &

energy calibration

0

7.5

6.0

7.0

8.0

5.5

6.5

9.5

8.5

Ea (MeV)


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