1. 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 12013/1/15RIBF SEMINAR

2. 2013/1/152RIBF SEMINAR

3. The Periodic Table has been evolving! 32013/1/15RIBF SEMINAR

4. N Z Region of interest 114? 184 120? new nuclides: ～ 40/year new element: ～ 0.3/year 42013/1/15RIBF SEMINAR

5. abc de f a b c d e f V= Z1Z2e 2 R Potential energy Bf: fission barrier Deformation or distance between two centers of fragments R : saddle : scission 52013/1/15RIBF SEMINAR

6. 2013/1/156 deformation Potential energy RIBF SEMINAR

7. 72013/1/15RIBF SEMINAR

8. 2013/1/15RIBF SEMINAR8 spherical deformed (axially symmetric) surface energy Coulomb energy Weizsächer-Bethe  2 deformation only

9. deformation Energy saddle scission 9 Physics of heavy and superheavy nuclei  large scale nuclear transmutation  quantum mechanical shell effect 2013/1/15RIBF SEMINAR

10. Superheavy Element 10 age of the universe ～ 4.3x10 17 s 2013/1/15RIBF SEMINAR

11. 11 120 119 118 117 116 115 114 113 112 Rg Ds Mt Hs Bh Sg Db Rf 162 184 262 266 265 264 262 261 260 259 258 257 258260259 260 261 262 263 262 261 SHE A A A  -decay Spontaneous fission  + or EC decay one end of nuclear chart ’84 － ’94 2013/1/15RIBF SEMINAR

12. 12 120 119 118 117 116 115 114 113 112 Rg Ds Mt Hs Bh Sg Db Rf 162 184 262 266 265 264 262 261 260 259 258 257 258260259 260 261 262 263 262 261 263 265266 267266 259 264 269270271 267 266 262 272 268 269 270271 277 278 273 274 261 270 265 263 264 267 268 271 272 271 275 276 275 279 280 279 278 281 284 285 286 282 283 284 283 287 288 289 290 286 287 288 290 291 292 293 294 SHE A A A  -decay Spontaneous fission  + or EC decay one end of nuclear chart 2009 263 278 274 270 294 293 290 289 286285 282 281 one end of nuclear chart 2010 2013/1/15RIBF SEMINAR

13. Main Limitations of Various Approaches to SHE Reaction ModeProj. (Aproj) LimitationHeaviest Nuclide comment (Z)(N) multiple n-capture nSF* of Fm isotopes100157maybe possible in nature (r-process) hot fusion (HI,xn);x=3-6 Ucn≥40 MeV ≤34 &48 small survival prob. (  n /  f very small) 118176N-rich beam often improves. (cf. 48 Ca;warm fusion) cold fusion (HI,xn);x=1,2 Ucn ≤20 MeV 50-70small fusion prob. (dynamical hindrance of fusion?) 113165 transfer reaction ≤22lack of target heavier than 254 Es** 103159 *SF: spontaneous fission. cf. T 1/2 of 258 Fm 158 ≈ 400  s. ** 254 Es(Z=99): T 1/2 ≈ 276 day 132013/1/15RIBF SEMINAR

14. Ring Cyclotron pamphlet 1986 First Beam Dec. 1986 142013/1/15RIBF SEMINAR

15. Ring Cyclotron pamphlet 1986 152013/1/15RIBF SEMINAR

16. Ring Cyclotron pamphlet 1990 GARIS/IGiSOL RIPS 162013/1/15RIBF SEMINAR

17. 172013/1/15RIBF SEMINAR

18. 18 2000 2013/1/15RIBF SEMINAR

19. GARIS, GARIS-II CL Superheavy Element Study at RIKEN RIBF Experimental setups Hot Lab. 192013/1/15RIBF SEMINAR

20. RILAC Facility 18GHz ECR Ion Source RFQ-Linac CSM Acc. Tanks RILAC Acc. Tanks GARIS CSM Dec. Tank 202013/1/15RIBF SEMINAR

21. 2013/1/15RIBF SEMINAR21 select the nuclei of our interest from the unwanted then transport to the detector 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 positions of incoming ions and their decay particles are transform to electric signal 18GHz ECR ion-source 理研 original RFQ-Linac GARIS

22. 22 116 115 114 113 112 111 Ds Mt Hs Bh Sg Db Rf Lr No Md Es Cf Fm 162 152  SF  + or EC -- 170 176 Reactions studied at RIKEN-GARIS 277 112 2 chains 271 Ds 14 chains 272 Rg 14 chains 278 113 New ! 208 Pb( 58 Fe, n) 265 Hs 208 Pb( 64 Ni, n) 271 Ds 209 Bi( 64 Ni, n) 272 Rg 208 Pb( 70 Zn, n) 277 Cn 209 Bi( 70 Zn, n) 278 113 207 Pb( 58 Fe, n) 264 Hs 206 Pb( 58 Fe, n) 263 Hs 208 Pb( 56 Fe, n) 263 Hs 208 Pb( 58 Fe, 2n) 264 Hs 248 Cm( 18 O,5n) 261 Rf 248 Cm( 22 Ne,5n) 265 Sg 248 Cm( 23 Na,5n) 266 Bh 263, 264, 265 Hs 261 Rf 265 Sg 2013/1/15RIBF SEMINAR

23. 23 beam Differential pumping section D1 Bending angle45 degree Pole gap150 mm Radius of central ray1200 mm Maximum field1.54 T Q1, Q2 Pole length500 mm Bore radius150 mm Maximum field gradient5.2 T/m D2 Bending angle10 degree Pole gap160 mm Pole length400 mm Maximum Field1.04 T MagnificationX-0.76 Y-1.99 Dispersion0.97 cm/% Total length5760 mm Acceptance  ±68 mrad  ±57 mrad  12.2 msr Rotating Target r150 mm  2000 rpm RIKEN Gas-filled Recoil Separator GARIS D1 Q1 Q2 D2 Standard method for heavy element physics: recoil separator + position sensitive FPD 2013/1/15RIBF SEMINAR

24. 24 MCP1 MCP2 SSD box PSD ions Focal Plane Detectors 2013/1/15RIBF SEMINAR

25. 2013/1/15RIBF SEMINAR25 Masses of Beams & Targets Audi & Wapstra, Nucl. Phys A565, 1 (1993) Masses of Compound Nuclei Myers & Swiatecki, Nucl. Phys. A601, 141 (1996) Calculated threshold of fission after 1n emission 5 10 15 20 Ex of C.N. (MeV) 20 10 4 2 1 0.5 0.3 0.2 0.1  (pb) 272 Ds 273 111 278 112 279 113

26. 2013/1/15RIBF SEMINAR26 SnSn (A – n) + n A B + T B + T + Ecm SnSn saddle point Deformation BfBf Second chance fission sreshold saddle point Deformation Energy diagram of 1n emission Ecm Ex(CN)

27. Cold fusion: 208 Pb 209 Bi 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 Z 1 ・ Z 2 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 48 Ca 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 Z 1 ・ Z 2 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。 2013/1/15RIBF SEMINAR27

28. Cross-section systematics and extrapolation 300 fb 400 fb 23 Na+ 248 Cm => 266 Bh+5n RIBF SEMINAR

29. 2013/1/15RIBF SEMINAR29

30. 2013/1/15RIBF SEMINAR30 Summary of 209 Bi + 70 Zn experiment J. Phys. Soc. Jpn., Vol. 76 (2007) 045001 J. Phys. Soc. Jpn., Vol. 73 (2004) 2593 period2003/9/5 ～ 2012/8/18 Beam Energy5.03 AMeV 348 MeV at target half depth Total Dose1.35x10 20 Target Thickness1.3x10 18 /cm 2 (0.45 mg/cm 2 )  _GARIS0.8  (3-events)2.2x10 -38 cm 2 22 +20 -13 fb Irradiation time13274 Hours(553 Days) Beam Intensity2.8x10 12 /s(0.47 p-  A) J. Phys. Soc. Jpn., Vol. 81 (2012) 103201

31. beamtimeirradiation time beam dose/sum number of observed events yearmonth/day[days][×10 19 ] 20039/5 - 12/2957.91.24/1.240 20047/8 - 8/221.90.51/1.751 20051/20 - 1/233.00.07/1.820 20053/20 - 4/2227.10.71/2.531 20055/19 - 5/212.00.05/2.580 20058/7 - 8/2516.10.45/3.030 20059/7 - 10/2039.01.17/4.200 200511/25 - 12/1519.50.63/4.830 20063/14 - 5/1554.21.37/6.200 20081/9 - 3/3170.92.28/8.480 20109/7 - 10/1830.90.52/9.000 20111/22 - 5/2289.82.01/11.010 201112/2 - 12/1914.40.33/11.340 20121/15 - 2/925.00.56/11.900 20123/13 - 4/1733.70.79/12.690 20126/12 - 7/215.70.25/12.940 20127/14 - 8/1832.00.57/13.511 Total55313.513 Table I.Summary of beamtime used. 2013/1/15RIBF SEMINAR31

32. 2013/1/15RIBF SEMINAR32

33. 2013/1/15RIBF SEMINAR33 278 113 274 111 270 Mt 266 Bh CN 11.68 MeV (PSD) 344 μs 30.49 mm 11.15 MeV 6.149+5.003 (PSD+SSD) 9.260 ms 30.40 mm 10.03 MeV 1.136+8.894(PSD+SSD) 7.163 ms 29.79 mm 9.08 MeV (PSD) 2.469 s 30.91 mm 36.75 MeV TOF 44.61 ns 30.33 mm 23-July-2004 18:55 (JST)     1 st chain 262 Db 204.05 MeV(PSD) 40.9 s 30.25 mm 278 113 274 111 270 Mt 266 Bh CN 11.52 MeV (PSD) 4.93 ms 30.16 mm 0.88+10.43=11.31 MeV (PSD+SSD) 34.3 ms 29.61 mm 2.32 MeV (escape) 1.63 s 29.45 mm 9.77 MeV (PSD) 1.31 s 29.65 mm 36.47 MeV TOF 45.69 ns 30.08 mm 2-April-2005 2:18 (JST) 209 Bi + 70 Zn → 278 113 + n     262 Db 192.32 MeV(PSD) 0.787 s 30.47 mm 2 nd chain s.f.  = 31 fb

34. RIBF SEMINAR 266 Bh 267 Bh 262 Db 200 150 100 50 250 E SF (Daughter) [MeV] E  (Daughter) [MeV] 10 9 8 8 9 E  (Mother) [MeV]  1-SF in (  1-  2-SF)  2-SF in (  1-  2-SF) J I H 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 262 Db 258 Lr 2013/1/1534

35. 278 113 274 Rg 270 Mt 266 Bh 279 113     262 Db   267 Bh 268 Bh 269 Bh 270 Bh 271 Bh S.F. 258 Lr one n evaporation five n evaporation decays observed in 278 113 synthesis decays observed in the present work 209 Bi + 70 Zn → 279 113 * 248 Cm + 23 Na → 271 Bh * 2013/1/1535RIBF SEMINAR

36. 362013/1/15RIBF SEMINAR

37. 278 113 274 Rg 270 Mt 266 Bh 262 Db 278 113 274 Rg 270 Mt 266 Bh 262 Db 278 113 274 Rg 270 Mt 266 Bh 262 Db 258 Lr 254 Md 11 22 33 44 S. F. 11 22 33 44 11 22 33 44 55 66 Jul. 23, 2004 Apr. 2, 2005 Aug. 12, 2012 11.68 ± 0.04 MeV 0.344 ms 11.15 ± 0.07 MeV 9.26 ms 10.03 ± 0.07 MeV 7.16 ms 9.08 ± 0.04 MeV 2.47 s 204 MeV 40.9 s 11.52 ± 0.04 MeV 4.93 ms 11.31 ± 0.07 MeV 34.3 ms 2.32 MeV (escape) 1.63 s 9.77 ± 0.04 MeV 1.31 s 192MeV 0.787 s 11.82 ± 0.06 MeV 0.667 ms 10.65 ± 0.06 MeV 9.97 ms 10.26 ± 0.07 MeV 444 ms 9.39 ± 0.06 MeV 5.26 s 8.63 ± 0.06 MeV 126 s 8.66 ± 0.06 MeV 3.78 s 2013/1/15RIBF SEMINAR37

38. 10  s 1 ms 0.1 s 10 s 1000 s 278 113  = 2.0 ms 274 Rg  = 18 ms 270 Mt  = 0.69 s 266 Bh  = 3.0 s 262 Db  = 56 s T_decay previous N=165 N=163 N=161 N=159 N=157 2013/1/15RIBF SEMINAR38

39. 10  s 1 ms 0.1 s 10 s 1000 s 278 113  = 2.0 ms 274 Rg  = 18 ms 270 Mt  = 0.69 s 266 Bh  = 3.0 s 262 Db  = 56 s T_decay previous N=165 N=163 N=161 N=159 N=157 present 2013/1/15RIBF SEMINAR39

40. 崩壊時間の常用対数 2013/1/15RIBF SEMINAR40

41. 254 Fm(Z = 100): b  = 99.94%, T 1/2 = 3.240 ± 0.002 h 6.898 ± 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%). 254 Md/ 254m Md(Z = 101): b EC = 100%/ 100%, T 1/2 = 10 ± 3 / 28 ± 8 min 258 Lr(Z = 103): b  = 97.5%. T 1/2 = 3.92 +0.35 –0.42 s 8.565 ± 0.025 MeV (20%), 8.595 ± 0.010 MeV (46%), 8.621 ± 0.010 MeV (25%), 8.654 ± 0.010 MeV (9%) 262 Db(Z = 105): b  /b SF = 67%/33%. T 1/2 = 34 ± 4 s 8.450 ± 0.020 MeV (75%), 8.530 ± 0.020 MeV (16%), 8.670 ± 0.020 MeV (9%)  5 E  = 8.63 ± 0.06 MeV  = 126 s (present)  = 56 +77 -21 s  T 1/2 = 39 +53 –14 s (three events)  6 E  = 8.66 ± 0.06 MeV  = 3.78 s  T 1/2 = 2.6 +12 -1.1 s (one events) no signal : E(X-ray of 254 Fm) max = 142 keV Energy threshold of PSD = 800 keV  7-1 E  = 7.26 ± 0.07 MeV  = 3.96 h P acc = 0.43  7-2 E  = 7.18 ± 0.06 MeV  = 6.42 h P acc = 0.70 250 Cf (Z=98): b  = 99.92% T 1/2 = 13.08 y 2013/1/15RIBF SEMINAR41

42. 209 Bi + 70 Zn  278 113 + n  4 : 266 Bh (Z = 107) 1 st E  = 9.08 ± 0.04 MeV,  = 2.47 s 2 nd E  = 9.77 ± 0.04 MeV,  = 1.31 s 3 rd E  = 9.39 ± 0.06 MeV,  = 5.26 s mean-life = 3.0 +4.2 -1.1 s  T 1/2 = 4.3 +6.1 -1.6 s Cf: 248 Cm + 23 Na  266 Bh + 5n 266 Bh (Z = 107) E  = 9.05 － 9.23 MeV,  > s 2013/1/15RIBF SEMINAR42

43. 113 112 277 Cn 111 272 Rg 110 269 Ds 270 Ds 271 Ds 273 Ds 109 266 Mt 268 Mt 108 263 Hs 265 Hs 266 Hs 267 Hs 269 Hs 270 Hs 271 Hs 107 261 Bh 262 Bh 264 Bh 266 Bh 267 Bh 106 258 Sg 259 Sg 261 Sg 263 Sg 105 259 Db 260 Db 104 256 Rf 260 Rf 261 Rf 262 Rf 103 255 Lr 257 Lr 258 Lr 259 Lr 260 Lr 261 Lr 262 Lr 102 256 No 258 No 260 No 262 No 101 253 Md 254 Md 259 Md 260 Md 100 252 Fm 254 Fm 255 Fm 257 Fm 258 Fm 259 Fm 99 251 Es 253 Es 256 Es 257 Es 98 250 Cf 251 Cf 252 Cf 253 Cf 254 Cf 255 Cf 256 Cf 262 Db 264 Hs 265 Sg 266 Sg 262 Sg 260 Sg 263 Db 263 Rf 261 Db 257 Db 258 Db 257 Rf 258 Rf 259 Rf 255 Md 256 Md 257 Md 258 Md 259 No 256 Fm 253 Fm 255 No 256 Lr 257 No 254 No 252 Es 255 Es 254 ES 278 113 274 Rg 270 Mt 266 Bh 262 Db     SF 278 113 274 Rg 270 Mt 266 Bh 262 Db     258 Lr  254 Md  254 Fm  250 Cf 118 117 293 117 294 117 116 115 287 115 288 115 289 115 290 115 114 113 282 113 283 113 284 113 285 113 286 113 278 Rg 279 Rg 280 Rg 281 Rg 282 Rg 274 Mt 275 Mt 276 Mt 278 Mt 270 Bh 271 Bh 272 Bh 274 Bh 266 Db 267 Db 268 Db 270 Db 294 118 290 Lv 291 Lv 286 Fl 287 Fl 282 Cn 275 Hs 267 Rf 283 Cn 279 Ds 271 Sg 1 st event Jul. 23 20042 nd event Apr. 2 20053 rd event Aug. 12 2012 既知核種 FLNR/LLNR/GSI/LBNL 209 Bi + 70 Zn  n CN 2013/1/15RIBF SEMINAR43

44. 294 118 290 Lv 291 Lv 286 Fl 287 Fl 282 Cn 283 Cn 275 Hs 267 Rf 271 Sg 279 Ds 113 112 277 Cn 111 272 Rg 110 269 Ds 270 Ds 271 Ds 273 Ds 109 266 Mt 268 Mt 108 263 Hs 265 Hs 266 Hs 267 Hs 269 Hs 270 Hs 271 Hs 107 261 Bh 262 Bh 264 Bh 266 Bh 267 Bh 106 258 Sg 259 Sg 261 Sg 263 Sg 105 259 Db 260 Db 104 256 Rf 260 Rf 261 Rf 262 Rf 103 255 Lr 257 Lr 258 Lr 259 Lr 260 Lr 261 Lr 262 Lr 102 256 No 258 No 260 No 262 No 101 253 Md 254 Md 259 Md 260 Md 100 252 Fm 254 Fm 255 Fm 257 Fm 258 Fm 259 Fm 99 251 Es 253 Es 256 Es 257 Es 98 250 Cf 251 Cf 252 Cf 253 Cf 254 Cf 255 Cf 256 Cf 262 Db 264 Hs 265 Sg 266 Sg 262 Sg 260 Sg 263 Db 263 Rf 261 Db 257 Db 258 Db 257 Rf 258 Rf 259 Rf 255 Md 256 Md 257 Md 258 Md 259 No 256 Fm 253 Fm 255 No 256 Lr 257 No 254 No 252 Es 255 Es 254 ES 278 113 274 Rg 270 Mt 266 Bh 262 Db     278 113 274 Rg 270 Mt 266 Bh 262 Db 258 Lr  254 Md  254 Fm  250 Cf 3 rd event Aug. 12 2012 既知核種 118 117 293 117 294 117 116 115 287 115 288 115 289 115 290 115 114 113 282 113 283 113 284 113 285 113 286 113 278 Rg 279 Rg 280 Rg 281 Rg 282 Rg 274 Mt 275 Mt 276 Mt 278 Mt 270 Bh 271 Bh 272 Bh 274 Bh 266 Db 267 Db 268 Db 270 Db FLNR/LLNR/GSI/LBNL Actinide-based, 48 Ca induced Hot fusion reactions 283 113 279 Rg 275 Mt 271 Bh 267 Db     SF 287 115  243 Am + 48 Ca  4n 284 113 280 Rg 276 Mt 272 Bh 268 Db     SF 288 115  243 Am + 48 Ca  3n 285 113 281 Rg  SF 289 115  243 Am + 48 Ca  2n 282 113 278 Rg 274 Mt 270 Bh 266 Db     SF 237 Np + 48 Ca  3n 285 113 281 Rg  SF 289 115  249 Bk + 48 Ca  4n 293 117  286 113 282 Rg 278 Mt 274 Bh 270 Db     SF 290 115  294 117  249 Bk + 48 Ca  3n 209 Bi + 70 Zn  n CN 2013/1/15RIBF SEMINAR44

45. 294 118 290 Lv 291 Lv 286 Fl 287 Fl 282 Cn 275 Hs 267 Rf CN 113 112 277 Cn 111 272 Rg 110 269 Ds 270 Ds 271 Ds 273 Ds 109 266 Mt 268 Mt 108 263 Hs 265 Hs 266 Hs 267 Hs 269 Hs 270 Hs 271 Hs 107 261 Bh 262 Bh 264 Bh 266 Bh 267 Bh 106 258 Sg 259 Sg 261 Sg 263 Sg 105 259 Db 260 Db 104 256 Rf 260 Rf 261 Rf 262 Rf 103 255 Lr 257 Lr 258 Lr 259 Lr 260 Lr 261 Lr 262 Lr 102 256 No 258 No 260 No 262 No 101 253 Md 254 Md 259 Md 260 Md 100 252 Fm 254 Fm 255 Fm 257 Fm 258 Fm 259 Fm 99 251 Es 253 Es 256 Es 257 Es 98 250 Cf 251 Cf 252 Cf 253 Cf 254 Cf 255 Cf 256 Cf 262 Db 264 Hs 265 Sg 266 Sg 262 Sg 260 Sg 263 Db 263 Rf 261 Db 257 Db 258 Db 257 Rf 258 Rf 259 Rf 255 Md 256 Md 257 Md 258 Md 259 No 256 Fm 253 Fm 255 No 256 Lr 257 No 254 No 252 Es 255 Es 254 ES 278 113 274 Rg 270 Mt 266 Bh 262 Db     278 113 274 Rg 270 Mt 266 Bh 262 Db 258 Lr  254 Md  254 Fm  250 Cf 3 rd event Aug. 12 2012 既知核種 118 117 293 117 294 117 116 115 287 115 288 115 289 115 290 115 114 113 282 113 283 113 284 113 285 113 286 113 283 Cn 278 Rg 279 Rg 280 Rg 281 Rg 282 Rg 274 Mt 275 Mt 276 Mt 278 Mt 270 Bh 271 Bh 272 Bh 274 Bh 266 Db 267 Db 268 Db 270 Db FLNR/LLNR/GSI/LBNL Actinide-based, 48 Ca induced Hot fusion reactions 249 Bk + 48 Ca  4n 243 Am + 48 Ca  2n 209 Bi + 70 Zn  n 285 113 281 Rg  SF 289 115  285 113 281 Rg  SF 289 115  293 117  CN 279 Ds 271 Sg 2013/1/15RIBF SEMINAR45

46. 46 Hindrance Factor (T exp /T calc ) Systematics by Viola & Seaborg a=1.81040, b=-21.7199, c=-0.26488, d=-28.1319 by Smolanczuk, Phys. Rev. C56(1997)812 112 Ds Hs Sg Rf 113 Rg Mt Bh neutron number 166 164162 160158 0.1 156 1 10 100 1000 2013/1/15RIBF SEMINAR

47. Program of SHE search and spectroscopy 209 Bi( 70 Zn, n) 278 113 experiment completed on Oct. 1, 2012. Study 208 Pb( 76 Ge, n) 283 114(Fl) reaction (under discussion). Start 248 Cm( 54 Cr, 3n) 299 120 experiment. Systematic study of 50 Ti induced hot-fusion reactions 248 Cm( 48 Ca, 3n) 293 Lv 244 Pu( 50 Ti, 3n) 291 Lv 248 Cm( 50 Ti, 3n) 295 118 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 472013/1/15RIBF SEMINAR

48. 48 RIKEN Nishina Center H. Haba, H. Hasebe, D. Kaji, K. Katori, Y. Kudou, T. Ohnishi, K. Ozeki, K. Morimoto, A. Yoneda, A. Yoshida, Tokyo University of Science T. Sumita, K. Tanaka, J. Chiba Saitama University T. Akiyama, R. Sakai, S. Yamaki, T. Yamaguchi Tohoku University T. 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 Tsukuba A. 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 University Y. 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 - ) 2013/1/15RIBF SEMINAR

49. 49 Thank you very much for your kind attention! 2013/1/15RIBF SEMINAR