Coulex Analysis Code – GOSIA: Current Status of Development

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Presentation transcript:

Coulex Analysis Code – GOSIA: Current Status of Development Paweł Napiorkowski (HIL UW -Warsaw) INTAG workshop, GSI, May 24-25, 2007

INTAG workshop, GSI, May 24-25, 2007 Overview What the GOSIA is. GOSIA2 GOSIA Manual Interpolation can make a problem (polynomials vs. spline) PIN option for GSI experiment INTAG workshop, GSI, May 24-25, 2007

COULEX Analysis Scheme Measured  yields Experimental setup geometry: particle and  detectors Level scheme MINIMALIZATION PROCEDURE Errors estimation available spectroscopic data (, BR, ) GOSIA set of matrix elements Quadrupole rotational invariant sum rules shape parameters for individual states SIGMA INTAG workshop, GSI, May 24-25, 2007

INTAG workshop, GSI, May 24-25, 2007 GOSIA2 GOSIA2 is intended to handle both target and projectile ”simultaneous” excitation with common normalization coefficients ”Simultaneous” inclusion of the lines originating from the second partner and usually known spectroscopic data makes it possible to achieve a unique solution for exotic case. For details – see upgraded manual INTAG workshop, GSI, May 24-25, 2007

INTAG workshop, GSI, May 24-25, 2007 GOSIA HomePage @ HIL http://www.slcj.uw.edu.pl/en/81.html http://web1.pas.rochester.edu/~cline/Research/ INTAG workshop, GSI, May 24-25, 2007

INTAG workshop, GSI, May 24-25, 2007 GOSIA mailing list To subscribe: send an e-mail to majordomo@slcj.uw.edu.pl a text message: subscribe gosia To get help, consultancy, to request a change in code… Also: Magda Zielińska: magda@slcj.uw.edu.pl Paweł Napiorkowski: pjn@slcj.uw.edu.pl INTAG workshop, GSI, May 24-25, 2007

Interpolation: be carefull Internal conversion coeficient 13 June 2006: Corrected ICC description in OP,YIEL to include use of four point interpolation and increase in number of ICC energies to 50. Integration: Using excessively fine meshpoints in the OP,INTG step or an excessive number of subdivisions may cause convergence issues. INTAG workshop, GSI, May 24-25, 2007

Polynominals vs. splines Expect a new option SPL in GOSIA1_002 soon (June 2007) INTAG workshop, GSI, May 24-25, 2007

COULEX with slow down beams Segmented annular Si detector (position and energy?) Event by event reconstruction: to group the same scattering angle to crate gamma spectrum for a given scattering angle Ge (Θ,φ) Target (Θ,φ) Ge INTAG workshop, GSI, May 24-25, 2007

”Virtual” particle detector M.Zielińska, 44Ar @ GANIL INTAG workshop, GSI, May 24-25, 2007

”Virtual” Detector Model for GOSIA PIN option useful to describe very difficult shapes of the particle detector The idea was successfully tested Problem: σp(Θ,φ) is not Rutherford’s But can be measured (e.g. downscaling) Modification of PIN option in necessary -weight parameter has to be applied to integration procedure (will be ready after summer 2007) INTAG workshop, GSI, May 24-25, 2007

Experiment – a physics case Something old, something new… Known - to test the procedure Unknown & exotic: to have a discover 100Mo & 102Mo INTAG workshop, GSI, May 24-25, 2007

Low laying 0+ in Mo isotopes INTAG workshop, GSI, May 24-25, 2007

Shape evolution in Mo isotopes M.Zielińska, K.Wrzosek,… INTAG workshop, GSI, May 24-25, 2007

What is a deformation of 102Mo? INTAG workshop, GSI, May 24-25, 2007