RoSphere: The germanium array at the Tandem accelerator of IFIN-HH A.Negret, D. Bucurescu, G. Cata-Danil, D. Deleanu, D. Filipescu, D.G. Ghita, I. Gheorghe,

RoSphere: The germanium array at the Tandem accelerator of IFIN-HH

A. Negret, D. Bucurescu, G. Cata-Danil, D. Deleanu, D. Filipescu, D.G. Ghita, I. Gheorghe, T. Glodariu, R. Lica, N. Marginean,

R. Marginean, A. Olacel, S. Pascu, T. Sava, L. Stroe, G. Suliman, R. Suvaiala, S. Toma, and N.V. Zamfir

Horia Hulubei National Institute for Physics and Nuclear Engineering, Bucharest-Magurele, ROMANIA

NSDD Meeting, KFAS, Safat, Kuwait, January 27-31, 2013

Summary


• A few words about IFIN-HH, Bucharest, ROMANIA

• The 9 MV Tandem accelerator

• RoSphere – Romanian Array for g Spectroscopy in Heavy Ion Reactions

• Recent measurements at RoSphere

• Other fields of research in the Nuclear Physics Department

• Conclusions

A. Negret et al. - RoSphere: The germanium array at the Tandem accelerator of IFIN-HH




• RoSphere



• Conclusions


A few words about The National Institute of Physics and Nuclear Engineering

IFIN-HH, Bucharest-Magurele, Romania - Location



IFIN-HH – Main facilities and departments



Cyclotron

Iradiation Facility

Hadronic Physics

Source Production

Reactor

9 MV Tandem

3 MV TandetronNUSTAR

1 MV Tandetron

Administration

Life & Environment




• RoSphere



• Conclusions


The 9 MV Tandem accelerator

The 9 MV Tandem accelerator



Built by High Voltage Engineering Corporation (HVEC) in 1973, upgraded from the original terminal voltage of 7.5 MV (FN machine) to 9 MV.Major upgrades during the last years.

The 9 MV Tandem



Ion sources:

Available beams: p (2 – 18 MeV), a (3 – 27 MeV) a broad range of heavy ions

Pulsing systems:

• SNICSII sputter negative ion source• source for negative helium ions• MC-SNICSII sputter negative ion source dedicated for AMS

HV generator: pelletron system; Voltage: 9 MV

• milliseconds: chopper• nanoseconds: chopper + buncher

Experimental area



• 2 experimental halls

• 7 beam lines




• RoSphere



• Conclusions


RoSphere: The Romanian Array for g Spectroscopy in Heavy Ion Reactions

RoSphere



Two configurations available:• Mixed array with 15 50% HPGe detectors with BGO

shields and 10-20 LaBr3(Ce) scintillators

• 25 HPGe detectors array

RoSphere with LaBr3(Ce)



14 HPGe detectors11 LaBr3(Ce) detectors

July 2012




• RoSphere



• Conclusions


Recent measurements at RoSphere

The first experiment with RoSphere:RDDS lifetime measurements in 120Te



110Pd(13C,3n) 120Te @50 MeV0.7 mg/cm2 110Pd Plunger device12 HPGe detectors mounted:5 @ 37◦ + 5 @ 143◦

1 @ 63◦ + 1 @ 117◦

C. Mihai et al.




Target supportStopper support

micrometer

Sliding bearings

inchworm

piezocrystalL=814 mm

Plunger device build after the widely used Cologne design (A. Dewald)

C. Mihai et al.




2+ 560 keV τ=12.2(4) ps 4+ 1161 keV τ=4.8(4) ps

VERY

PRE

LIM

INAR

Y RE

SULT

S

C. Mihai et al.

In-beam Fast Timing measurements: 199Tl



197Au(α,2n)199Tl @ 24 MeV

N.Mărginean et al., Eur. Phys. J. A46, 329 (2010)

332-369 keV coincidence“Prompt” coincidence

367-381 keV coincidenceCentroid shift

In-beam Fast Timing measurements in 99,101,103Ru



96Mo(α,n) 99Ru

98Mo(α,n)101Ru

100Mo(α,n)103Ru

S. Lalkovski et al.

96,98Ru have vibrational behaviour, while the mid-shell Ruisotopes are triaxialy deformed. Thus, 99,101,103Ru isotopes are placed in the region where the onset of deformation is expected to occur.

E a = 14-18

MeV

Experimental purpose: measurement of the half lives of positive parity low-lying states and 15/2- states in 99,101,103Ru




S. Lalkovski et al.




S. Lalkovski et al.




• RoSphere



• Conclusions


Other fields of research in the Nuclear Physics Department

Nuclear physics measurements for energetics: The development of Generation IV Nuclear Reactors

Precise Neutron Inelastic Cross Section Measurements @ GELINA, EC-JRC-IRMM, Belgium

A. Negret, C. Borcea, Ph. Dessagne, M. Kerveno, A.J.M. Plompen

Required uncertainty level: ~5%



Spectroscopy of the A=34 decay chain at ISOLDE, CERN



Spokespersons: F. Negoita, S. Grévy

• Structure – based on OSIRIS (Bucharest)• 3 CLOVER detectors (Bucharest)• 1 HPGe detector (90%) (CEA Arpajon)• 5 LaBr3 detectors (4 Legnaro, 1 Bucharest)• ~4p plastic scintilator (Bucharest)• 3 neutron detectors (DEMON)• Fast Tape Station (Strasbourg)



Large European Projects




• RoSphere



• Conclusions


Conclusions



Advertisement

The ERINDA consortium groups 13 partners, equipped with nuclear data research infrastructures. The project sponsors the transnational access for experiments performed at any of the 13 facilities.

The TANDEM accelerator of IFIN-HH is part of ERINDA.

The last deadline for proposals: September 30, 2012

www.erinda.org

Future project proposed for transnational access: CHANDA.



Conclusions

• The 9 MV Tandem accelerator in Bucharest delivers a large variety of stable beams. The facility was completely modernized during the last years.

• A large variety of detecting devices are available:• The RoSphere array with up to 25 HPGe detectors and/or LaBr3 detectors,• Clover detectors,• A plunger device,• Neutron detectors.

• We are particularly well equipped for nuclear lifetime measurements.

• Financial support is available for certain type of measurements.

• Two PAC meetings /year; usually the requested beam time represents 150%-200% of the available beam time.

Documents

RoSphere: The germanium array at the Tandem accelerator of IFIN-HH A.Negret, D. Bucurescu, G. Cata-Danil, D. Deleanu, D. Filipescu, D.G. Ghita, I. Gheorghe,