Luis M Fraile Luis M Fraile ISOLDE, PH/IS, CERN, SwitzerlandISOLDE, PH/IS, CERN, SwitzerlandUniversidad Complutense, Madrid, SPAINUniversidad Complutense, Madrid, SPAIN

FastPoolFastPool

Fast timing pool of detectors and electronicsFast timing pool of detectors and electronics

FastPoolFastPool

Fast timing pool of detectors and electronicsFast timing pool of detectors and electronics

EURONS EURISOL-DS Town Meeting, Espoo, 17 September 2007

L.M. Fraile Helsinki Town meeting 19 September 2007

[H. Mach et al., NPA 523 (1991) 197]

HPGe

LaBr 3(C

e)

BaF2

ISOLDE beam

(NE111A)

The Advanced Time Delayed The Advanced Time Delayed (t) (t) methodmethod

HPGe: BRANCH SELECTIONHigh energy resolutionPoor time response

LaBr3(Ce)/BaF2: TIMINGFast response γ-detectors Poor energy resolutionStop detectors

Plastic scintillator: TIMINGFast response Efficient start detector

stop

start

1

2

T1/2

TAC

L.M. Fraile Helsinki Town meeting 19 September 2007

The Advanced Time Delayed The Advanced Time Delayed (t) method(t) method

TAC–BaF2–HPGe / –LaBr3–HPGe: lifetime measurements

–HPGe–HPGe: coincidences, level scheme

De-convolution of slope• Slope = T1/2

• Range: 30 ps to 30 ns (or longer)

• 3-5% precision

Centroid shift• Shift in centroid position = • Range: down to ~5-10 ps

L.M. Fraile Helsinki Town meeting 19 September 2007

T1/2

Branchings

B(X) transition rates→ Shell closures:

• N=82 Z=50 double shell closure

• N=20 island of inversion

• ...

→ Evolution of collectivity• Quadrupole deformation

• Octupole correlations

→ B(E2;2+ 0+) systematics in n-rich exotic nucleivs. CoulEx / vs. differential plunger method

The Advanced Time Delayed The Advanced Time Delayed (t) (t) methodmethod

L.M. Fraile Helsinki Town meeting 19 September 2007

Fast timing across European Facilities

ISOLDE → 30-33Mg→ 134-137Sb, 136Te... → 148Ba...→ 229,231Ra, 231Ac, 226Th...

JYFL→ 112Ru, 112Pd, 114Pd

GANIL ILL Grenoble…

→ First Application of LaBr3(Ce) to timing, ISOLDE 2006

L.M. Fraile Helsinki Town meeting 19 September 2007

FastPoolFastPool

Improve the coordination of European resources used in spectroscopy studies with the ATD method→ Profit from existing experience and scientific achievements

→ Explore new physics opportunities

→ Exploit technical advances

→ Natural extension of the Fast Timing pool of electronics

Network over 4 years16 participant institutions from 10 countries

L.M. Fraile Helsinki Town meeting 19 September 2007

GoalsGoals

Sharing→ State-of-the-art equipment for ATD spectroscopy for leading experiments at

EU research infrastructures New physics opportunities

→ Identify needs for instrumentation and new techniques→ Facilitate novel research programmes in these facilities

Coordination→ New R&D projects enhancing the ATD method and its range of

applicability→ Coordination of R&D work on fast response scintillators with other projects

New collaborations→ Encourage exchange information at the European nuclear physics

community. Future opportunities

→ Large arrays of fast timing crystals→ Future facilities (HIE-ISOLDE, SPIRAL2, FAIR, EURISOL)→ New fields (i.e. LaBr3:Ce for PAC)

L.M. Fraile Helsinki Town meeting 19 September 2007

ParticipantsParticipants

ISOLDE, CERN, Geneva, SWITZERLANDUppsala University, Uppsala, SWEDENUniversidad Complutense de Madrid, Madrid, SPAINLPSC, Grenoble, FRANCEUniversity of Sofia, Sofia, BULGARIAInstitute of Nuclear Physics, University of Cologne, Cologne, GERMANYINFN-LNL, Legnaro, ITALYIFJ PAN, Krakow, POLANDIEM-CSIC, Madrid, SPAINPhysics Department, University of Warsaw, POLANDILL, Grenoble, FRANCECSNSM, Orsay, FRANCEUniversity of Surrey, Guildford, UNITED KINGDOMIPN, Orsay, FRANCESINS, Swierk, POLANDNIPNE, ROMANIA