Discovery of highly excited long-lived isomers in neutron- rich hafnium and tantalum isotopes through direct mass measurements Matthew Reed, Brighton PRE-SPEC.

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Presentation transcript:

Discovery of highly excited long-lived isomers in neutron- rich hafnium and tantalum isotopes through direct mass measurements Matthew Reed, Brighton PRE-SPEC meeting January 2011

Region of Interest 2. I. J. Cullen, Private Communication Matthew Reed, Brighton PRE-SPEC meeting January 2011

Region of Interest 2. I. J. Cullen, Private Communication Matthew Reed, Brighton PRE-SPEC meeting January 2011

Region of Interest 3. P. Walker et al., Nature, 399 (1999) Matthew Reed, Brighton PRE-SPEC meeting January 2011

Ion Sources UNILAC SIS ESR SHIP FRS Experimental Areas 197 Au Beam at ~500 Mev/u 9 Be Target Matthew Reed, Brighton PRE-SPEC meeting January 2011

1. F. Bosch, J. Phys. B: At. Mol. Opt. Phys. 36(2003) Matthew Reed, Brighton PRE-SPEC meeting January 2011

time 4 particles with different mass over charge ratios

Sin(  1 ) Sin(  2 ) Sin(  3 ) Sin(  4 ) 11 22 33 44 time Fast Fourier Transform Schottky Mass Spectrometry Matthew Reed, Brighton PRE-SPEC meeting January 2011

A =190 q= W Re m Os g Os +74 Matthew Reed, Brighton PRE-SPEC meeting January 2011

Loss Mechanism Bare Ions Lorentz Corrected t 1/2 =21(4)m Matthew Reed, Brighton PRE-SPEC meeting January 2011

Hafnium A=183 Matthew Reed, Brighton PRE-SPEC meeting January 2011

Hafnium A=183 γ decay ~3s cooling time Matthew Reed, Brighton PRE-SPEC meeting January 2011

A= g Ta g Hf +72 Matthew Reed, Brighton PRE-SPEC meeting January 2011

A= g Ta g Hf m1 Hf +72 Matthew Reed, Brighton PRE-SPEC meeting January 2011

A= g Ta g Hf m1 Hf m2 Hf +72 Matthew Reed, Brighton PRE-SPEC meeting January 2011

Merging 2. I. J. Cullen, Thesis 2010

Tantalum A=186 Matthew Reed, Brighton PRE-SPEC meeting January 2011

Tantalum A=186 γ decay Matthew Reed, Brighton PRE-SPEC meeting January 2011

Tantalum A=186 β decay Matthew Reed, Brighton PRE-SPEC meeting January 2011

A= g Re g Ta g W +73 Matthew Reed, Brighton PRE-SPEC meeting January 2011

A= g Re g Ta g W m1 Ta +73 Matthew Reed, Brighton PRE-SPEC meeting January 2011

A= g Re g Ta g W m1 Ta m2 Ta +73 Matthew Reed, Brighton PRE-SPEC meeting January 2011

Results Matthew Reed, Brighton PRE-SPEC meeting January 2011

Results Matthew Reed, Brighton PRE-SPEC meeting January 2011

Results Matthew Reed, Brighton PRE-SPEC meeting January 2011

Collaborators P.M. Walker, K. Blaum, F. Bosch, C. Brandau, J.J. Carroll, D.M. Cullen, I.J. Cullen, A.Y. Deo, B. Detwiler, C. Dimopoulou, G.D.Dracoulis, F. Farinon, H. Geissel, E. Haettner, M. Heil, R.S. Kempley, R. Knöbel, C. Kozhuharov, J. Kurcewicz, N. Kuzminchuk, S. Litvinov, Yu.A.Litvinov, Z. Liu, R. Mao, C. Nociforo, F. Nolden, W.R. Plass, A. Prochazka, C.Scheidenberger, M. Steck, T. Stöhlker, B. Sun, T.D. Swan, G. Trees, H. Weick, N. Winckler, M.Winkler, P.J. Woods and T.Yamaguchi Thank you! Matthew Reed, Brighton PRE-SPEC meeting January 2011