Laura Nelsonln@ns.ph.liv.ac.uk

PSA meeting, CSNSM Orsay28th June 2007

Current Status of Parametric PSA of In-beam

data

Experimental Details

BEAMx

yz

Target->Ge distance (y): 10.9cm

Target->Si distance (z): 3.4cm

Si angular range: 250<<520

Si thickness: 300m

Aluminium absorber: 16m thick

BEAM

48Ti beam @100MeVDeuterium targetInverse kinematicsDirect, fusion evaporation

and Coulex reactions

- S001 - S002 - S003

Separation of Reaction Channels

ReactionE* beam-like recoil

(keV)

E* target-like recoil

(keV)

Transfer48Ti (d,p) 49Ti* 1382 0

Fusevap

48Ti (d,p) 49Ti* 1382 0

Coulex48Ti(12C,12C*)48Ti* 984 4439

Coulex48Ti(16O,16O*)48Ti* 984 6049

Coulex

48Ti(d,d*)48Ti* 984 0

*4

*34

343121

EET

TMMTMM

EE fiin

For transfer and Coulex:Conservation of energy

44124

21

23 cos2 PPPPP

Conservation of momentum

For fusion-evaporation:Fit output of a PACE calculation

giving statistical proton energy as a function of angle.

Then consider the energy loss per unit path length in Ti target, Al absorber, and Si detector as a function of angle

TWOFNR calculation

S002 Singles Scan Results

Front face and tapered side singles scan

1GBq Cs-137 source, E = 662keV

Cartesian grid in 1mm steps

1 minute per position 1mm injection collimator

120mm long

Incident photons

Incident photons

Azimuthal ParameterICA ICA std

err

Radial ParameterT30 T90

correlation

T30 T90std err

Next Steps Fit risetime parameter as a function of radius => in-beam

radial interaction position

Fit ICA parameter as a function of azimuthal angle for each radius => determine in-beam azimuthal interaction position

Determine dependence of these parameters on the z depth of interaction position using singles side scan.

Use side singles scan to fit vertical ICA => in-beam vertical interaction position

Show the improvement to the Doppler correction at each stage and compare this to other PSA algorithms to determine their efficacy

Verify the reproducibility of parametric method by producing the same plots for S003.

Acknowledgements:A.J. Bostona, H.C. Bostona, J.R. Cresswella, M.R. Dimmocka, J.Ljungvallc,

P.J. Nolana, F. Recchiad, S.V. Rigbya, J. Simpsonb

AndAll AGATA collaborators.

aThe University of Liverpool, Oxford Street, Liverpool L69 7ZE, UK.b CCLRC Daresbury Laboratory, Warrington WA4 4AD, UK.

c CEA/DSM/DAPNIA/SPhN, Cedex, France.dUniversity and INFN Padova, Italy.

Laura Nelsonln@ns.ph.liv.ac.uk

PSA meeting, CSNSM Orsay28th June 2007

H2 Coulex particles still present.This is by far the strongest reaction.There are s from 48Ti at 1312keV and 1437keV.

Transfer reactionTotal x-section = 10.19mbQ-value = 5.91MeV

Fusevap reactionTotal x-section = 3.7mbQ-value = 13.87MeV

Cross Sections