D1. TASCA Focal Plane Detector Setup (Physics) - first mounting and detector tests

Transcription

1 D1. TASCA Focal Plane Detector Setup (Physics) - first mounting and detector tests setup description installation of the PC (position check) detector & electronics next steps completion of the detector set-up further detector development dedicated detector chamber for Ge-array double sided Si strip detector electronics: pulse shape analysis... nuclear structure and SHE synthesis with TASCA VISHNu - news

2 TASCA Working groups

3 TASCA Detector Set-up Scheme wobbler target chamber beam diagnosis boxes dipole quadrupoles focal plane detector chambers differential pumping target GSI Darmstadt Matthias Schädel, GSI, Target Group Meeting, Mainz, 02 Mar 2005 REC SHE CHEM TASCA

4 TASCA Detector Set-up Scheme wobbler target chamber Transmission beam diagnosis boxes Detectors dipole PIN diode arrays (box) quadrupoles X-ray detector Ge-clover detector focal plane detector chambers differential pumping target stop X-ray detector detector GSI Darmstadt Matthias Schädel, GSI, Target Group Meeting, Mainz, 02 Mar 2005 REC SHE CHEM TASCA

5 The SHIP STOP Detector (80x35)mm 2 active area 16 strips - (5x35)mm 2 active area 300 µm thickness resistive layer position resolution = 200 µm total spatial resolution 1 mm 2 energy reslution E = E > 6 MeV α 32 signals

6 The TASCA Position Check (PC) Detector

7 The TASCA Position Check (PC) Detector

8 The TASCA Position Check (PC) Detector

9 Front-end Electronics

10 New DAQ SHIP NIM ADC Silena bit (8k) >> 50 parameters max. rate 50 khz random trigger real time clock dead time 10 µs NIM ADC multiplexer AMUX (J. Hoffmann, GSI) bit pattern // // SCSI ethernet R I O S A M GTB

11 AMUX/SHIP like Electronics - state of roadworks digital part ADC's AMUX's power supply RIO3 SAM TRIVA analog part sum & invert E low & E high position analog part (modules from JYFL/RITU) complete for: 16 strips 2 E ranges: E low and E high y-position (E low and E high ) digital part: 12 ADC channels (presently only 6 ADC's) all components tested and the set-up is almost completed PA's at the TASCA detector chamber

12 TASCA Focal Plane Detector Setup (Physics) - State of the Project test of X-ray detectors by summer student summer 2005 (Khuyagbaatar, Jadambaa) after/during completion of TASCA winter 2005/ mounting of stop detector for first tests of TASCA spring 2006 ( )ionoptics ( )transmission first reaction products in the focal plane of TASCA (April 27 th 2006) electronics set-up analog electronics (from Jyväskylä Cath Scholes) July 2006 ( ) set up of the DAQ-system Sept/Oct 2006 future completion of the set-up stop detector arrangment PIN diodes Ge detectors X-ray detectors Thomas Stöhlker GSI/AP transmission detectors (PPAC or channelplate/sed (window!)) first experiments... (

13 TASCA Focal Plane Detector Setup (Physics) - State of the Project test of X-ray detectors by summer student summer 2005 (Khuyagbaatar, Jadambaa) after/during completion of TASCA winter 2005/ mounting of stop detector for first tests of TASCA spring 2006 ( )ionoptics ( )transmission first reaction products in the focal plane of TASCA (April 27 th 2006) electronics set-up analog electronics (from Jyväskylä Cath Scholes) July 2006 ( ) set up of the DAQ-system Sept/Oct 2006 future completion of the set-up stop detector arrangment PIN diodes Ge detectors X-ray detectors money requested at the last BMBF round (A. Türler) ,- ( 10% of request) Thomas Stöhlker GSI/AP transmission detectors (PPAC or channelplate/sed (window!)) first experiments... ( 1 Ph.D. position

14 Nuclear Structure of Heavy Nuclei - Single Particle Levels and Deformation neutrons protons 184 7/2-[514] f 5/2 d 5/ /2+[624] 152 j 15/2 9/2-[734] f 7/2 i 13/ /2-[521] 3/2-[521] g 9/ /2+[631] h 9/ /2+[633] F.P. Heßberger Chiemsee workshop, last Monday

15 ER-α-γ Spectroscopy after Separation (e.g. SHIP, TASCA...) high eff. 15%

16 ER-α-γ Spectroscopy after Separation highly efficient (e.g. SHIP, TASCA...) clean structure information for SHE K-isomers indentified in 252 No ,3 +- 0,2 203,6 +- 0,2 γ - spectrum in coincidence high eff. 15% counts to 255 Rf α-decay (86,2 +- 0,3) E γ / kev

17 Nuclear Structure of the Heaviest Nuclei: Odd-A odd-z Istopes for Z = Present status of nuclear structure investigations of odd A odd Z elements in the region Z = Level assignments are partly tentive low spin isomers 209 Bi( 40 Ar,2n) 247 Md sf /2 - [521] 247 Md no γ Bi( 50 Ti,2n) 257 Db /2 - [521]? 1/2 - [521] 9/2 + [624] 257 Db 9/2 -? no γ Lr 249 Md 1/2 - [521] Md 209 Bi( 48 Ca,2n) 255 Lr 255 Lr 9/2 + [624]? 259 Db /2 - [521] (E1) (E1) (E1?) (E1) (E1) (E1) 9/2 + 9/2 + 9/2 + 9/2 + (?) 7/2 + [633] 7/2 + 7/2 + [633] 7/2 + [633] [633] 7/2 + [633] 243 3/2 - [521]? 3/2 - [521]? Es 3/2- [521]? 249 3/2 Es [521] Es Es Es g.s. not yet identified /2 - [521] 1/2 - [521] Md /2 -? 207 Pb( 48 Ca,2n) 253 No -EC-> 253 Md 9/2 + [624]? 261 Db 257 Lr 259 Lr / Md increasing deformation niv_mend_alles_aktuell, FPH

18 Nuclear Structure of the Heaviest Nuclei: Isotopes explored at SHIP Proton Number Discovered at SHIP, new or enhanced decay data measured 258 Sg 259 Sg 260 Sg 261 Sg 2.9 ms 0.48 s 3.6 ms 0.23 s 6.9 ms 0.3 s 0.9 s sf α α 8.77,8.72 α sf α 9.25 α 9.06 sf Decay data reproduced 255 Db 256 Db 257 Db 258 Db 259 Db 260 Db 261 Db 262 Db or confirmed 21.3 s 1.6 s 0.76 s 1.4 s 4.5 s 0.51 s 1.5 s 1.8 s 34 s α 8.10, α 9.01, α 9.16 α α 9.17, α 9.47 α 9.04,9.07 α 9.93 α 8.45, sf? sf? sf sf 253 Rf 254 Rf 255 Rf 256 Rf 257 Rf 258 Rf 259 Rf 260 Rf 261 Rf 48 µs 23 µs 1.64 s 6.2 ms 4.9 s 8.0 s 12 ms 3.0 s 21 ms 78 s α 8.28 sf α sf α 9.01, α sf 8.72 α sf 8.77,8.87 sf α sf? sf sf 252 Lr 253 Lr 254 Lr 255 Lr 256 Lr 257 Lr 258 Lr 259 Lr 260 Lr 0.36 s 1.5 s 0.57 s 13 s 2.1 s 17 s 25.9 s 0.65 s 3.9 s 6.3 s 3 m α 9.02, α 8.72 α 8.79 α 8.49, α α 8.43, α 8.66,8.80 α 8.59, α 8.72 α 8.03 sf sf sf No No No No 253 No 254 No 255 No 256 No 257 No 258 No 259 No 54 µs??? 0.93 s 0.78 s s 2.24s s 1.7 m 0.28 s 55 s 3.1 m 2.91 s 26 s 1.2 ms 58 m 54 µs 5.6 µs γα 8.41,8.37 α α 8.01 α Iγ 8.10 α α 8.45,8.40 α 8.22,8.27 sf α 7.52, sf? α 8.61 sf sf α 8.68 sf sf sf sf 246 Md 247 Md 248 Md 249 Md 250 Md 251 Md 252 Md 253 Md 254 Md 255 Md 256 Md 257 Md 258 Md 1 s 0.29s 1.12 s 7 s 24 s 52 s 4.0 m 2.3 m 27 m 1.3 h 5.0h α 8.74 α α α , α 8.03 α m 28 m α 7.75, m 56 d α 7.55 α 6.72, α ( ) α 7.33 α 7.21, α 7.06 sf Fm 246 Fm 247 Fm 248 Fm 249 Fm 250 Fm 251 Fm 252 Fm 253 Fm 254 Fm 255 Fm 256 Fm 257 Fm 4.2 s 1.1 s 36 s 2.6 m 3.0 d 3.24 h 20.1 h 70 ns 2.63 h d 9.2 s 35 s 1.8s 30 m 5.3 h h α 6.94, α 7.19, α 7.02, Iγ sf α α α 8.24 α 8.18 α α 7.53, α 7.53 α 7.43 α 6.88, α 7.04, sf Iγ sf sf sf sf sf α 8.92 sf 244 Es 245 Es 246 Es 247 Es 248 Es asymmetric reactions 249 Es 250 Es 251 Es 252 Es 253 Es 254 Es 255 Es 256 Es 37 s 1.3 m 7.7 m 4.7 m 28 m 1.7 h 2.22h 8.6h 33 h 471,7 h 20.4 d 39.3 h 276d 39.8 d 22 m α 6.63, α 6.30, h α 7.73 α 7.36 α 7.31 β α α 6.87 α 7.57 α 6.49,6.46 α 6.63, sf α β β β 243 Cf 244 Cf 245 Cf 246 Cf 247 Cf 248 Cf 249 Cf 250 Cf 251 Cf 252 Cf 253 Cf 254 Cf 255 Cf 10.7 m 19.7 m 43.6 m 35.7 h 3.11 h d a 13,08 a 898 a 2,64 a 60.5 d 1h? 12.3 m α 6.75, 6.71 α 6.26,6.22 α 5.81,5.95 α 6.03, α 5.68, β α 7.06,7.17 α α 6.12, sf α 7.21, 7.18 sf α 5.83 β α 6.30 sf sf sf sf α Neutron Number 262 Sg 263 Sg F.P. Heßberger,

19 Nuclear Structure of the Heaviest Nuclei: Isomeric states 252 No (Ph.D. Thesis B. Sulignano) ms 1254 kev 206 Pb( 48 Ca,2n) 252 No "offspin" from 48 Ca U kev Counts T 1/2 =101.2 ± 13.9 ms t (ms) Counts (4+ --> 2+) (line dublett) K α1,2 (+ 123?) (6+ --> 4+) 224 (8+ --> 6+) (evtl. diff. lifetime) E γ / kev No252iso F.P.Heßberger

20 Towards SHE - Where are we now where do we aim at? tools and goals: systematic reaction mechanism studies nuclear structure studies asymmetric reactions fill the gap between "cold" and "hot" fusion TASCA

21 Call for "Virtual Institutes" by the HGF - SHE Proposal Selcted by the GSI-WD VISHNu Virtual Institute SuperHeavy Nuclei Dr. D. Ackermann Abteilung KP2-SHIP GSI Darmstadt Prof. Dr. J.V. Kratz Institut für Kernchemie Johannes Gutenberg-Universität Mainz Prof. Dr. N.N. Institut für Kernchemie Johannes Gutenberg-Universität Mainz Prof. Dr. A. Türler Institut für Radiochemie Technische Universität München Dr. M. Schädel Abteilung KP2-Kernchemie GSI Darmstadt Prof. Dr. H.W. Gäggeler Dr. R. Eichler Paul Scherrer Institut -PSI Villigen Schweiz Prof. Dr. R.-D. Herzberg University of Liverpool U.K. Prof. Dr. M. Leino University of Jyväskylä Finnland Prof. J.P. Omtvedt University of Oslo Norway Partner Institutions and Spokespersons

22 Helmholtz Virtual Institute VISHNu - postponed to next year