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New Result in Production and Decay of an Isotope, 278 113, of the 113 th Element Kosuke Morita Superheavy Element Laboratory RIKEN Nishina Center for Accelerator-Based Science, RIKEN. The Periodic Table has been evolving!. Region of interest. 120?. 114?. new nuclides: ~ 40/year. - PowerPoint PPT Presentation
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New Result in Production and Decay of an Isotope, 278113, of the 113th Element
Kosuke Morita
Superheavy Element LaboratoryRIKEN Nishina Center for Accelerator-Based Science, RIKEN
12013/1/15 RIBF SEMINAR
2013/1/15 2RIBF SEMINAR
The Periodic Table has been evolving!
32013/1/15 RIBF SEMINAR
N
Z
Region of interest
114?
184
120?
new nuclides: ~ 40/year
new element: ~ 0.3/year
42013/1/15 RIBF SEMINAR
a b c d e f
a bc
de
f
V= Z1Z2e2
R
Pote
ntial
ene
rgy
Bf: fission barrier
Deformation or distance between two centers of fragments R
: saddle: scission
52013/1/15 RIBF SEMINAR
2013/1/15 6
deformation
Pote
ntial
ene
rgy
RIBF SEMINAR
Z=116
72013/1/15 RIBF SEMINAR
2013/1/15 RIBF SEMINAR 8
spherical deformed (axially symmetric)
factorscalePRRn
nn :])(cos1[)(2
0
surfaceenergy
Coulombenergy
3/2
20
0 4
Aa
RE
S
S
)75
521(
),,(
23
22
0
32
S
S
E
E
3/1
2
0
220
53
AZa
ReZE
C
C
)4910
511(
),,(
23
22
0
32
C
C
E
E
0R )(R
)()(),( 3/123/2 AAZaAZNaAaAaZAB CiSV Weizsächer-Bethe
)2
1(52)()0( 0
002
223S
CSCS E
EEEEE b2 deformation only
)804.17,710.0(501
22)(
22
0
0
MeVaMeVaAZ
AZ
aa
EEfissilityx
SC
S
C
S
C
deformation
Ener
gy
saddle
scission
9
Physics of heavy and superheavy nuclei
large scale nuclear transmutation quantum mechanical shell effect
2013/1/15 RIBF SEMINAR
Superheavy Element
10
age of the universe ~ 4.3x1017 s
2013/1/15 RIBF SEMINAR
11
120
119
118
117
116
115
114
113
112
Rg
Ds
Mt
Hs
Bh
Sg
Db
Rf
162 184
262
266
265264
262
261
261
260259
258
257 258 260259
260 261 262
263
262261
SHE
A
A
A
-decay
Spontaneous fission
b+ or EC decay
one end of nuclear chart ’84 -’ 94
2013/1/15 RIBF SEMINAR
12
120
119
118
117
116
115
114
113
112
Rg
Ds
Mt
Hs
Bh
Sg
Db
Rf
162 184
262
266
265264
262
261
261
260259
258
257 258 260259
260 261 262
263
262261 263
265 266
267266
259
264
269 270 271
267266
262
272
268
269 270 271
277
278
273
274
261
270
265
263
264
267
267 268
268
271 272
271
275 276
275
279 280
279
278
281
284 285 286
282
282
283 284
283
287 288 289 290286
287 288
290 291 292 293
294
SHE
A
A
A
-decay
Spontaneous fission
b+ or EC decay
one end of nuclear chart 2009
263
278
274
270
294293
290289
286285
282281
one end of nuclear chart 2010
2013/1/15 RIBF SEMINAR
Main Limitations of Various Approaches to SHE
Reaction Mode Proj. (Aproj)
Limitation Heaviest Nuclide
comment
(Z) (N)
multiplen-capture
n SF* of Fm isotopes 100 157 maybe possible in nature (r-process)
hot fusion(HI,xn);x=3-6Ucn≥40 MeV
≤34&48
small survival prob.(Gn/Gf very small)
118 176 N-rich beam often improves.(cf. 48Ca;warm fusion)
cold fusion(HI,xn);x=1,2Ucn ≤20 MeV
50-70 small fusion prob.(dynamical hindrance of fusion?)
113 165
transferreaction
≤22 lack of target heavier than 254Es**
103 159
*SF: spontaneous fission. cf. T1/2 of 258Fm158 ≈ 400 ms.**254Es(Z=99): T1/2 ≈ 276 day
132013/1/15 RIBF SEMINAR
Ring Cyclotron pamphlet 1986 First Beam Dec. 1986
142013/1/15 RIBF SEMINAR
Ring Cyclotron pamphlet 1986
152013/1/15 RIBF SEMINAR
Ring Cyclotron pamphlet 1990
GARIS/IGiSOL
RIPS
162013/1/15 RIBF SEMINAR
172013/1/15 RIBF SEMINAR
Moved from RRC to RILAC facility
Layout of the RI Beam Factory (RIBF)
18
2000
2013/1/15 RIBF SEMINAR
GARIS, GARIS-IICL
Superheavy Element Study at RIKEN RIBF
Experimental setups
Hot Lab.
192013/1/15 RIBF SEMINAR
RILAC Facility 18GHz ECR Ion Source
RFQ-Linac
CSM Acc. Tanks RILAC Acc. Tanks
GARIS
CSM Dec. Tank
202013/1/15 RIBF SEMINAR
2013/1/15 RIBF SEMINAR 21
select the nuclei of ourinterest from the unwanted
then transport to thedetector chamber
Experimental setup
標的(金属薄膜)
incident ion beam(粒子の流れ)
イオン源
加速器
分離装置 (separator)
検出器 (detectors)
nucl. reaction
remove electrons from neutral atoms
accelerate ions using electric field information of energies or positionsof incoming ions and their decayparticles are transform to electric signal
18GHz ECR ion-source理研 original
RFQ-Linac
GARIS
22
116115114
113112
111Ds
MtHs
BhSg
DbRfLrNoMd
EsCf
Fm
162
152
SFb+ or ECb-
170
176
Reactions studied at RIKEN-GARIS
277112 2 chains
271Ds 14 chains
272Rg 14 chains 278113
New !
208Pb(58Fe, n)265Hs208Pb(64Ni, n)271Ds209Bi(64Ni, n)272Rg208Pb(70Zn, n)277Cn209Bi(70Zn, n)278113207Pb(58Fe, n)264Hs206Pb(58Fe, n)263Hs208Pb(56Fe, n)263Hs208Pb(58Fe, 2n)264Hs248Cm(18O,5n)261Rf248Cm(22Ne,5n)265Sg248Cm(23Na,5n)266Bh
263, 264, 265Hs
261Rf
265Sg
2013/1/15 RIBF SEMINAR
23
beamDifferential pumping section
D1Bending angle 45 degreePole gap 150 mmRadius of central ray 1200 mmMaximum field 1.54 TQ1, Q2Pole length 500 mmBore radius 150 mmMaximum field gradient 5.2 T/mD2Bending angle 10 degreePole gap 160 mmPole length 400 mmMaximum Field 1.04 T
Magnification X -0.76Y -1.99
Dispersion 0.97 cm/%Total length 5760 mmAcceptance ±68 mrad
f ±57 mradW 12.2 msr
Rotating Targetr 150 mmw 2000 rpm
RIKEN Gas-filled Recoil Separator GARIS
D1 Q1 Q2 D2
Standard method for heavy element physics: recoil separator + position sensitive FPD
2013/1/15 RIBF SEMINAR
24
MCP1MCP2
SSD box
PSD
ions
Focal Plane Detectors
2013/1/15 RIBF SEMINAR
2013/1/15 RIBF SEMINAR 25
Masses of Beams & TargetsAudi & Wapstra, Nucl. Phys A565, 1 (1993)
Masses of Compound NucleiMyers & Swiatecki, Nucl. Phys. A601, 141 (1996)
Calculated threshold of fission after 1n emission
5 10 15 20Ex of C.N. (MeV)
20
10
4
2
1
0.5
0.30.20.1
s (p
b)272Ds
273111
278112
279113
2013/1/15 RIBF SEMINAR 26
Sn
(A – n) + n
A
B + T
B + T + EcmSn
saddle pointDeformation
Bf
Second chance fissionsreshold
saddle pointDeformation
Energy diagram of 1n emission
Ecm
Ex(
CN
)
Cold fusion:
208Pb 209Bi など魔法数をもつ安定な標的に相手方となるビームを照射する。クーロン障壁近傍の入射エネルギーでは複合核の励起エネルギーが15 ~ 20MeV 程度。複合核の脱励起の過程で 1 個ないし 2 個の中性子を出して超重元素である蒸発残留核を生じる。核分裂との競合回数が少ないのが利点であるが積 Z1 ・ Z2 が大きくいわゆる融合阻害の度合いが大きい。より中性子欠損の大きい核が合成されるため既知核へ連結することが多い。Hot fusion :アクチノイド標的に 48Ca を照射する。クーロン障壁近傍の入射エネルギーでは複合核の励起エネルギーが 35 ~ 45MeV 程度。 2 ないし 4 個の中性子を出して脱励起しする。cold fusion に比べて標的とビームの原子番号がより非対称であるため、積 Z1 ・ Z2 がcold fusion に比べ小さく、いわゆる融合阻害は無いと言われている。より中性子欠損が少ない核が合成され、 α 崩壊チェーンは中性子過剰な側に突っ込み既知核へ到達しない。
2013/1/15 RIBF SEMINAR 27
RIBF SEMINAR
Cross-section systematics and extrapolation
300 fb 400 fb
23Na+248Cm => 266Bh+5n
2013/1/15 RIBF SEMINAR 29
2013/1/15 RIBF SEMINAR 30
Summary of 209Bi + 70Zn experiment
J. Phys. Soc. Jpn., Vol. 76 (2007) 045001J. Phys. Soc. Jpn., Vol. 73 (2004) 2593
period 2003/9/5 ~ 2012/8/18Beam Energy 5.03 AMeV
348 MeV at target half depth
Total Dose 1.35x1020
Target Thickness 1.3x1018 /cm2 (0.45 mg/cm2)e_GARIS 0.8s(3-events) 2.2x10-38 cm2
22 +20-13 fb
Irradiation time 13274 Hours (553 Days)Beam Intensity 2.8x1012 /s (0.47 p-mA)
J. Phys. Soc. Jpn., Vol. 81 (2012) 103201
beamtime irradiation time
beam dose/sum
number of observed
eventsyear month/day [days] [×1019]2003 9/5 - 12/29 57.9 1.24/1.24 02004 7/8 - 8/2 21.9 0.51/1.75 12005 1/20 - 1/23 3.0 0.07/1.82 02005 3/20 - 4/22 27.1 0.71/2.53 12005 5/19 - 5/21 2.0 0.05/2.58 02005 8/7 - 8/25 16.1 0.45/3.03 02005 9/7 - 10/20 39.0 1.17/4.20 02005 11/25 - 12/15 19.5 0.63/4.83 02006 3/14 - 5/15 54.2 1.37/6.20 02008 1/9 - 3/31 70.9 2.28/8.48 02010 9/7 - 10/18 30.9 0.52/9.00 02011 1/22 - 5/22 89.8 2.01/11.01 02011 12/2 - 12/19 14.4 0.33/11.34 02012 1/15 - 2/9 25.0 0.56/11.90 02012 3/13 - 4/17 33.7 0.79/12.69 02012 6/12 - 7/2 15.7 0.25/12.94 02012 7/14 - 8/18 32.0 0.57/13.51 1Total 553 13.51 3
Table I. Summary of beamtime used.
2013/1/15 RIBF SEMINAR 31
2013/1/15 RIBF SEMINAR 32
2013/1/15 RIBF SEMINAR 33
278113
274111
270Mt
266Bh
CN11.68 MeV (PSD)344 μs30.49 mm
11.15 MeV6.149+5.003 (PSD+SSD)9.260 ms30.40 mm
10.03 MeV 1.136+8.894(PSD+SSD)7.163 ms29.79 mm
9.08 MeV (PSD)2.469 s30.91 mm
36.75 MeVTOF 44.61 ns30.33 mm
23-July-2004 18:55 (JST)
1st chain
262Db
204.05 MeV(PSD)40.9 s30.25 mm
278113
274111
270Mt
266Bh
CN11.52 MeV (PSD)4.93 ms30.16 mm
0.88+10.43=11.31 MeV(PSD+SSD)34.3 ms29.61 mm
2.32 MeV (escape)1.63 s29.45 mm
9.77 MeV (PSD)1.31 s29.65 mm
36.47 MeVTOF 45.69 ns30.08 mm
2-April-2005 2:18 (JST)
209Bi + 70Zn → 278113 + n
262Db
192.32 MeV(PSD)0.787 s30.47 mm
2nd chain
s.f.s.f.
s = 31 fb
RIBF SEMINAR
266Bh267Bh262Db
200
150
100
50
250
E SF (D
augh
ter)
[MeV
]E
(Dau
ghte
r) [M
eV]
10
9
88 9 10
E (Mother) [MeV]
1-SF in (1-2-SF)2-SF in (1-2-SF)
J IH
G F E
2-3 in (1-2-3)1-2 in (1-2-3/SF)
1-3 in (1-2-3)1-2
1-SF
C A
B
D
a
b
262Db
258Lr
2013/1/15 34
278113
274Rg
270Mt
266Bh
279113
262Db
267Bh 268Bh 269Bh 270Bh 271Bh
S.F.258Lr
one n evaporation
five n evaporation
decays observed in 278113 synthesis
decays observed in the present work 209Bi + 70Zn → 279113*
248Cm + 23Na → 271Bh*
2013/1/15 35RIBF SEMINAR
362013/1/15 RIBF SEMINAR
278113
274Rg
270Mt
266Bh
262Db
278113
274Rg
270Mt
266Bh
262Db
278113
274Rg
270Mt
266Bh
262Db
258Lr
254Md
1
2
3
4
S. F.
1
2
3
4
S. F.
1
2
3
4
5
6
Jul. 23, 2004Apr. 2, 2005
Aug. 12, 2012
11.68 ± 0.04 MeV0.344 ms
11.15 ± 0.07 MeV9.26 ms
10.03 ± 0.07 MeV7.16 ms
9.08 ± 0.04 MeV2.47 s
204 MeV40.9 s
11.52 ± 0.04 MeV4.93 ms
11.31 ± 0.07 MeV34.3 ms
2.32 MeV (escape)1.63 s
9.77 ± 0.04 MeV1.31 s
192MeV0.787 s
11.82 ± 0.06 MeV0.667 ms
10.65 ± 0.06 MeV9.97 ms
10.26 ± 0.07 MeV 444 ms
9.39 ± 0.06 MeV5.26 s
8.63 ± 0.06 MeV 126 s
8.66 ± 0.06 MeV3.78 s
2013/1/15 RIBF SEMINAR 37
10 ms 1 ms 0.1 s 10 s 1000 s
278113 t = 2.0 ms
274Rg t = 18 ms
270Mt t = 0.69 s
266Bh t = 3.0 s
262Db t = 56 s
T_decay
previous
N=165
N=163
N=161
N=159
N=157
2013/1/15 RIBF SEMINAR 38
10 ms 1 ms 0.1 s 10 s 1000 s
278113 t = 2.0 ms
274Rg t = 18 ms
270Mt t = 0.69 s
266Bh t = 3.0 s
262Db t = 56 s
T_decay
previous
N=165
N=163
N=161
N=159
N=157
present
2013/1/15 RIBF SEMINAR 39
)exp(1)0()(tttNtn
)10lnexp(10 ut u
}]10ln)exp{(1[}]10ln)exp{(10ln)exp[()10)(ln0()(000
2 uuuuuuNduudn
崩壊時間の常用対数2013/1/15 RIBF SEMINAR 40
254Fm(Z = 100):b = 99.94%, T1/2 = 3.240 ± 0.002 h6.898 ± 0.003 MeV (0.0066%),7.050 ± 0.002 MeV (0.82%),7.150 ± 0.002 MeV (14.2%),7.192 ± 0.002 MeV (84.9%).
254Md/ 254mMd(Z = 101):bEC = 100%/ 100%, T1/2 = 10 ± 3 / 28 ± 8 min
258Lr(Z = 103): b = 97.5%.T1/2 = 3.92+0.35
–0.42 s8.565 ± 0.025 MeV (20%), 8.595 ± 0.010 MeV (46%), 8.621 ± 0.010 MeV (25%),8.654 ± 0.010 MeV (9%)
262Db(Z = 105):b/bSF = 67%/33%.T1/2 = 34 ± 4 s8.450 ± 0.020 MeV (75%),8.530 ± 0.020 MeV (16%),8.670 ± 0.020 MeV (9%)
5
E = 8.63 ± 0.06 MeVt = 126 s (present)t = 56 +77 -21 s T1/2 = 39 +53 –14 s (three events)
6
E = 8.66 ± 0.06 MeVt = 3.78 s T1/2 = 2.6 +12 -1.1 s (one events)
no signal :E(X-ray of 254Fm)max = 142 keVEnergy threshold of PSD = 800 keV
7-1
E = 7.26 ± 0.07 MeVt = 3.96 h Pacc = 0.43
7-2
E = 7.18 ± 0.06 MeVt = 6.42 h Pacc = 0.70
250Cf (Z=98):b = 99.92%T1/2 = 13.08 y
2013/1/15 RIBF SEMINAR 41
209Bi + 70Zn 278113 + n4: 266Bh (Z = 107)
1st E = 9.08 ± 0.04 MeV, t = 2.47 s2nd E = 9.77 ± 0.04 MeV, t = 1.31 s3rd E = 9.39 ± 0.06 MeV, t = 5.26 s
mean-life = 3.0 +4.2 -1.1 s T1/2 = 4.3 +6.1 -1.6 s
Cf:248Cm + 23Na 266Bh + 5n266Bh (Z = 107)
E = 9.05 - 9.23 MeV, t > s
2013/1/15 RIBF SEMINAR 42
113
112 277Cn
111 272Rg
110 269Ds 270Ds 271Ds 273Ds
109 266Mt 268Mt
108 263Hs 265Hs 266Hs 267Hs 269Hs 270Hs 271Hs
107 261Bh 262Bh 264Bh 266Bh 267Bh
106 258Sg 259Sg 261Sg 263Sg
105 259Db 260Db
104 256Rf 260Rf 261Rf 262Rf
103 255Lr 257Lr 258Lr 259Lr 260Lr 261Lr 262Lr
102 256No 258No 260No 262No
101 253Md 254Md 259Md 260Md
100 252Fm 254Fm 255Fm 257Fm 258Fm 259Fm
99 251Es 253Es 256Es 257Es
98 250Cf 251Cf 252Cf 253Cf 254Cf 255Cf 256Cf
262Db
264Hs
265Sg 266Sg262Sg260Sg
263Db
263Rf
261Db257Db 258Db
257Rf 258Rf 259Rf
255Md 256Md 257Md 258Md
259No
256Fm253Fm
255No
256Lr
257No254No
252Es 255Es254ES
278113
274Rg
270Mt
266Bh
262Db
SF
278113
274Rg
270Mt
266Bh
262Db
258Lr
254Md
254Fm
250Cf
118
117 293117 294117
116
115 287115 288115 289115 290115
114
113 282113 283113 284113 285113 286113
278Rg 279Rg 280Rg 281Rg 282Rg
274Mt 275Mt 276Mt 278Mt
270Bh 271Bh 272Bh 274Bh
266Db 267Db 268Db 270Db
294118
290Lv 291Lv
286Fl 287Fl
282Cn
275Hs
267Rf
283Cn
279Ds
271Sg
1st event Jul. 23 20042nd event Apr. 2 20053rd event Aug. 12 2012
既知核種
FLNR/LLNR/GSI/LBNL
209Bi + 70Zn n
CN
2013/1/15 RIBF SEMINAR 43
294118
290Lv 291Lv
286Fl 287Fl
282Cn 283Cn
275Hs
267Rf
271Sg
279Ds
113
112 277Cn
111 272Rg
110 269Ds 270Ds 271Ds 273Ds
109 266Mt 268Mt
108 263Hs 265Hs 266Hs 267Hs 269Hs 270Hs 271Hs
107 261Bh 262Bh 264Bh 266Bh 267Bh
106 258Sg 259Sg 261Sg 263Sg
105 259Db 260Db
104 256Rf 260Rf 261Rf 262Rf
103 255Lr 257Lr 258Lr 259Lr 260Lr 261Lr 262Lr
102 256No 258No 260No 262No
101 253Md 254Md 259Md 260Md
100 252Fm 254Fm 255Fm 257Fm 258Fm 259Fm
99 251Es 253Es 256Es 257Es
98 250Cf 251Cf 252Cf 253Cf 254Cf 255Cf 256Cf
262Db
264Hs
265Sg 266Sg262Sg260Sg
263Db
263Rf
261Db257Db 258Db
257Rf 258Rf 259Rf
255Md 256Md 257Md 258Md
259No
256Fm253Fm
255No
256Lr
257No254No
252Es 255Es254ES
278113
274Rg
270Mt
266Bh
262Db
278113
274Rg
270Mt
266Bh
262Db
258Lr
254Md
254Fm
250Cf
3rd event Aug. 12 2012
既知核種
118
117 293117 294117
116
115 287115 288115 289115 290115
114
113 282113 283113 284113 285113 286113
278Rg 279Rg 280Rg 281Rg 282Rg
274Mt 275Mt 276Mt 278Mt
270Bh 271Bh 272Bh 274Bh
266Db 267Db 268Db 270Db
FLNR/LLNR/GSI/LBNLActinide-based, 48Ca inducedHot fusion reactions
283113
279Rg
275Mt
271Bh
267Db
SF
287115
243Am + 48Ca 4n
284113
280Rg
276Mt
272Bh
268Db
SF
288115
243Am + 48Ca 3n
285113
281Rg
SF
289115
243Am + 48Ca 2n
282113
278Rg
274Mt
270Bh
266Db
SF
237Np + 48Ca 3n285113
281Rg
SF
289115
249Bk + 48Ca 4n
293117
286113
282Rg
278Mt
274Bh
270Db
SF
290115
294117
249Bk + 48Ca 3n
209Bi + 70Zn n
CN CN
CNCNCN
CNCN
2013/1/15 RIBF SEMINAR 44
294118
290Lv 291Lv
286Fl 287Fl
282Cn
275Hs
267Rf
CN113
112 277Cn
111 272Rg
110 269Ds 270Ds 271Ds 273Ds
109 266Mt 268Mt
108 263Hs 265Hs 266Hs 267Hs 269Hs 270Hs 271Hs
107 261Bh 262Bh 264Bh 266Bh 267Bh
106 258Sg 259Sg 261Sg 263Sg
105 259Db 260Db
104 256Rf 260Rf 261Rf 262Rf
103 255Lr 257Lr 258Lr 259Lr 260Lr 261Lr 262Lr
102 256No 258No 260No 262No
101 253Md 254Md 259Md 260Md
100 252Fm 254Fm 255Fm 257Fm 258Fm 259Fm
99 251Es 253Es 256Es 257Es
98 250Cf 251Cf 252Cf 253Cf 254Cf 255Cf 256Cf
262Db
264Hs
265Sg 266Sg262Sg260Sg
263Db
263Rf
261Db257Db 258Db
257Rf 258Rf 259Rf
255Md 256Md 257Md 258Md
259No
256Fm253Fm
255No
256Lr
257No254No
252Es 255Es254ES
278113
274Rg
270Mt
266Bh
262Db
278113
274Rg
270Mt
266Bh
262Db
258Lr
254Md
254Fm
250Cf
3rd event Aug. 12 2012
既知核種
118
117 293117 294117
116
115 287115 288115 289115 290115
114
113 282113 283113 284113 285113 286113
283Cn
278Rg 279Rg 280Rg 281Rg 282Rg
274Mt 275Mt 276Mt 278Mt
270Bh 271Bh 272Bh 274Bh
266Db 267Db 268Db 270Db
FLNR/LLNR/GSI/LBNLActinide-based, 48Ca inducedHot fusion reactions
249Bk + 48Ca 4n
243Am + 48Ca 2n
209Bi + 70Zn n
285113
281Rg
SF
289115
285113
281Rg
SF
289115
293117
CN
CN
279Ds
271Sg
2013/1/15 RIBF SEMINAR 45
46
1.E-01
1.E+00
1.E+01
1.E+02
1.E+03
156 158 160 162 164 166
112113113-2Hi
ndra
nce
Fact
or (T
exp/
T calc)
dcZQbaZTcalc 10log
Systematics by Viola & Seaborg
a=1.81040, b=-21.7199, c=-0.26488, d=-28.1319by Smolanczuk, Phys. Rev. C56(1997)812
112DsHs
SgRf
113
RgMtBh
neutron number
1661641621601580.1
156
1
10
100
1000
2013/1/15 RIBF SEMINAR
Program of SHE search and spectroscopy209Bi(70Zn, n)278113 experiment completed on Oct. 1, 2012.Study 208Pb(76Ge, n)283114(Fl) reaction (under discussion).Start 248Cm(54Cr, 3n)299120 experiment.Systematic study of 50Ti induced hot-fusion reactions 248Cm(48Ca, 3n)293Lv244Pu(50Ti, 3n)291Lv248Cm(50Ti, 3n)295118
New isotope search of the heaviest nuclei and detailed spectroscopy with cold and hot fusion reactions.
Mass measurement of the heaviest nuclei with m-TOF system coupled to GARIS (Wada-san’s group)
Study of heavy ion transfer reaction with GARIS for the study of neutron rich nuclei around N=126 region.
Try to measure X-ray from evaporation residues (in collaboration with W. Henning).
Developing FPD detector system for --e coincidence experiment
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RIKEN Nishina CenterH. Haba, H. Hasebe, D. Kaji, K. Katori, Y. Kudou,
T. Ohnishi, K. Ozeki, K. Morimoto, A. Yoneda, A. Yoshida,
Tokyo University of ScienceT. Sumita, K. Tanaka, J. Chiba
Saitama University
T. Akiyama, R. Sakai, S. Yamaki, T. Yamaguchi
Tohoku UniversityT. Suda, H. Kikunaga, T. Shinozuka
JAEA
H. Koura, S. Mitsuoka, K. Ooe, N. Sato, A. Toyoshima, K. Tsukada, Y. Wakabayashi
Niigata University
S. Goto, M. Murakami, M. Murayama, Y. Kanaya, H. Kudo,
YITP Kyoto University
T. Ichikawa,
University of TsukubaA. Ozawa, K. Sueki
Yamagata University
Y. Fujimori, K. Mayama, T. Mashiko ,S. Namai, M. Takeyama, F. Tokanai,
Center for Nuclear Science, University of Tokyo
E. Ideguchi
Osaka UniversityY. Kasamatsu, Y. Kitamoto, Y. Komori, T. Kuribayashi,
K. Matsuo, D. Saika, A. Shinohara, T. Takabe, Y. Tashiro, T. Yoshimura
Kanazawa University
T. Nanri, D. Suzuki, I. Yamazaki, A. Yokoyama
Collaborators (2006 - )
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Thank you very much for your kind attention!
2013/1/15 RIBF SEMINAR